CN121018336A - A precision grinding machine for mold steel production - Google Patents
A precision grinding machine for mold steel productionInfo
- Publication number
- CN121018336A CN121018336A CN202511550121.8A CN202511550121A CN121018336A CN 121018336 A CN121018336 A CN 121018336A CN 202511550121 A CN202511550121 A CN 202511550121A CN 121018336 A CN121018336 A CN 121018336A
- Authority
- CN
- China
- Prior art keywords
- support
- frame
- workpiece
- precision grinding
- grinding
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Constituent Portions Of Griding Lathes, Driving, Sensing And Control (AREA)
Abstract
The invention relates to the technical field of die steel production, in particular to a finish grinding machine for die steel production, which comprises a main processing machine tool, machine tool moving guide rail platforms at two ends and an outer workpiece conveying machine table, wherein the main processing machine tool comprises a main support base, a machine tool support foot pad, a finish grinding box body base and a finish grinding machining box at the top, and a workpiece support carrier assembly, a plurality of finish grinding machine units and a cold air circulating device are arranged in the finish grinding machining box in a staggered manner in sequence along the trend of the carrier. The fine grinding machine set comprises a fixed frame, an upper supporting frame, a lower supporting frame, a driving belt roller and a fine grinding machining belt which is wound around the fixed frame, a connecting rod driving assembly drives the lower driving belt roller to adjust the fine grinding speed and direction, the upper supporting frame adjusts the position of the upper driving belt roller to change the fine grinding direction, and guide limiting wheels on two sides of the machine set limit the edges of the fine grinding belt to ensure the track to be stable. The design reduces heat accumulation through instant cooling, solves the thermal deformation of die steel, and realizes dynamic parameter adjustment and high-precision grinding.
Description
Technical Field
The invention relates to the technical field of die steel production, in particular to a finish grinding machine for die steel production.
Background
The die steel is used as a key material for manufacturing various dies, and plays a vital role in a plurality of fields such as mechanical manufacturing, automobile industry, aerospace and the like. The quality and performance of the die directly affect the precision, surface quality and production efficiency of the product, and the processing precision of the die steel is one of the core factors for determining the quality of the die. The finish grinding can obviously improve the surface finish, the dimensional accuracy and the shape accuracy of the die steel, and ensure that the die steel meets the requirements of high-accuracy die manufacturing. In the field of precision machining of die steel, a precision grinding process is a key link for ensuring the dimensional accuracy, the surface quality and the microstructure stability of a workpiece.
The traditional die steel finish grinding equipment usually adopts a mode of concentrated cooling after continuous grinding or relies on a cooling device which is arranged in a scattered way, so that heat generated in the grinding process cannot be timely conducted out. Because the die steel (such as high-carbon high-alloy steel) has poor heat conductivity, heat is easy to accumulate in the workpiece during long-time continuous grinding or heavy-load processing, and the peak temperature of a grinding area is caused to be too high, so that microstructure burn and macroscopic thermal deformation are caused, and the performance and the service life of the workpiece are seriously influenced. In addition, the traditional fine grinding equipment mostly adopts a grinding wheel as a grinding medium, and the rigid structure of the grinding wheel can ensure certain processing efficiency, but has insufficient ductility and microcosmic consistency, and is difficult to adapt to the processing requirement of the hardness change of a workpiece or a material with a complex shape.
Disclosure of Invention
The invention aims to provide a finish grinding machine for producing die steel, which aims to solve the problems in the prior art.
In order to achieve the above purpose, the present invention provides the following technical solutions:
The fine grinding grinder for producing die steel comprises a main processing machine tool, two machine tool moving guide rail platforms respectively arranged at two ends of the main processing machine tool and two workpiece transmission machine platforms respectively arranged at the outer sides of the two machine tool moving guide rail platforms, wherein the main processing machine tool comprises a main support base, machine tool support foot pads arranged at two sides of the main support base, a fine grinding carriage body base arranged on the main support base and a fine grinding carriage arranged at the top of the fine grinding carriage body base, the workpiece transmission machine platform is arranged on the transmission machine support base on the machine tool support foot pads,
The fine grinding processing carriage is internally provided with a workpiece support carrier assembly, a plurality of fine grinding processing units and a plurality of cold air circulation devices, wherein the workpiece support carrier assembly is arranged at the bottom of the fine grinding processing carriage, and both ends of the workpiece support carrier assembly are respectively in butt joint with the corresponding movable guide rail platform of the machine tool;
the fine grinding machine units and the cold air circulation devices are sequentially staggered along the trend of the workpiece support carrier assembly, one cold air circulation device is arranged behind each fine grinding machine unit, and the next fine grinding machine unit is arranged behind each cold air circulation device.
As a further aspect of the present invention, the fine grinding machine set includes:
A unit internal fixed frame;
A lower supporting frame arranged below the internal fixed frame of the unit and a lower driving belt roller supported on the lower supporting frame;
an upper supporting frame arranged above the unit internal fixing frame and an upper driving belt roller supported on the upper supporting frame;
A fine grinding processing belt wound on the lower driving belt roller and the upper driving belt roller;
The connecting rod transmission assembly is arranged at the side part of the fixed frame in the unit and is used for driving the roller of the lower transmission belt to rotate so as to adjust the fine grinding speed and direction of the fine grinding processing belt;
The guiding limit wheels are arranged on two sides of the fixed frame in the unit and driven by the upper supporting frame, and are used for limiting the belt edges of the fine grinding processing belt;
Wherein the upper support frame is used for adjusting the position of the upper belt roller to change the fine grinding direction of the fine grinding processing belt.
As a further aspect of the present invention, the link transmission assembly includes:
the transmission rotating shaft is arranged at the side edge of the fixed frame in the unit;
The connecting rotary bolt is arranged at the shaft end of the transmission rotary shaft;
a transmission driving connecting rod arranged on the connecting rotary bolt;
the swing driving arm is arranged at the swing end of the transmission driving connecting rod;
the bottom support rod is arranged at the bottom of the lower support frame, a steering connecting sleeve is arranged at the top end of the bottom support rod through a swing joint, the terminal end of the rotating shaft section of the lower driving belt roller is fixed in the steering connecting sleeve, and the swing driving arm is connected with the steering connecting sleeve.
As a further aspect of the present invention, the upper support frame includes:
a frame supporting base;
the steering adjusting device is arranged on the frame supporting base and is driven by the driving end of the steering adjusting device to adjust the rotation axis;
A steering support base provided on the frame support base;
the swing driving rack is erected on the steering support base, and the shaft end of the adjusting rotating shaft is connected with the swing driving rack;
The shaft bracket end support rod is arranged at the top of the swing driving frame and is used for supporting a roller body mounting bracket of the upper transmission belt roller.
The guiding limiting wheel comprises a wheel body mounting seat, a wheel hub arranged on the wheel body mounting seat, and a left half guiding wheel and a right half guiding wheel coaxially sleeved on the wheel hub, wherein a guiding limiting gap for embedding a side line of a fine grinding processing belt is formed between the left half guiding wheel and the right half guiding wheel, and the wheel body mounting seat is fixed on a side edge protection bracket connected to the side edge of the swing driving frame.
The invention further provides a main body of the cold air circulation device, wherein the main body of the cold air circulation device is a cold air storage box body, the top of the cold air storage box body is provided with a cold air conveying spray head, the bottom of the cold air storage box body is provided with an airflow diffusion guide piece, the whole cold air storage box body is in a flat trapezoid shape, the inner space of the cold air storage box body is gradually reduced from one end of the cold air conveying spray head to one end of the airflow diffusion guide piece, the space width of the cold air storage box body is gradually increased, the airflow diffusion guide piece is in an inclined strip-shaped structure, and the cold air storage box body is hoisted on a top hoisting support arranged at the top of an inner cavity of the fine grinding processing box body through a plurality of hoisting connecting rods arranged around the cold air storage box body.
As a further proposal of the invention, the workpiece conveying machine comprises:
a main stand support;
The inner support frame plate is arranged at the inner edge of the main support frame of the machine table;
A plurality of workpiece transmission rollers which are arranged between the internal support frame plates in parallel, penetrate through the main support frame of the machine table in the roller end of the workpiece transmission rollers and are synchronously driven by the gear belt;
The lateral protection brackets are arranged at the two sides of the lower part of the main support frame body of the machine table;
the adjusting screw is arranged between the lateral protective brackets at two sides, and the bottom limiting base frame is movably arranged on the adjusting screw;
the lateral limiting guide wheels are arranged at the top of the bottom limiting base frame and are arranged in a row, and penetrate out of gaps among roller bodies of the workpiece conveying rollers and are used for being attached to two sides of a die steel workpiece.
As a further aspect of the invention, the workpiece support carrier assembly comprises:
carrier main bases respectively arranged at two sides of the accurate grinding carriage body base;
a structural reinforcing support block and an internal supporting chassis mounted on the main base of the carrier;
The support conveying rollers are arranged between the inner support underframes at two sides, each two support conveying rollers are in a group, and each group of support conveying rollers is provided with a workpiece clamping positioning disc through a synchronous driving wheel;
the workpiece clamping and positioning disc is arranged on the inner sliding guide rail in a sliding manner so as to adjust the interval between each group of supporting conveying rollers.
The invention further provides a scheme that a lateral auxiliary support frame is arranged on the inner carriage wall of the fine grinding processing carriage, one end of an internal fixing frame of the unit is fixedly arranged on the lateral auxiliary support frame, and the other end of the internal fixing frame is supported by a lower support frame;
One end of the supporting shaft section of the lower driving belt roller is provided with a rotating shaft section which is arranged on the lower supporting frame through a bearing; the other end of the support shaft section is provided with a shaft end support part, the main base of the carrier is provided with a support fixing seat and a plurality of fixed support bearings arranged on the support fixing seat, and the shaft end support part is fixedly arranged on the corresponding fixed support bearings.
The lifting driving cylinder is arranged on the frame connecting fixing seat, the lifting driving push rod driven by the lifting driving cylinder is arranged on the frame connecting fixing seat, and the bottom of the roller body mounting bracket of the upper driving belt roller is erected at the supporting end of the lifting driving push rod through the overturning bracket.
Compared with the prior art, the invention has the beneficial effects that:
The invention designs a staggered multi-stage grinding cooling principle, realizes the instant strong cooling after the local grinding by a staggered arrangement mode of a fine grinding machine set-cold air circulation device along the trend of a workpiece support carrier, breaks through the traditional continuous cooling mode after grinding, realizes the rapid cooling before a large amount of grinding heat is accumulated and diffused in a workpiece, reduces the peak temperature of a grinding area to the greatest extent, and particularly solves the problems of microstructure burn and macroscopic thermal deformation caused by heat accumulation, which are very easy to occur in the lower die steel for long-time continuous grinding and heavy-load grinding.
The upper supporting frame adjusts the action angle of the grinding belt, the connecting rod transmission assembly precisely controls the linear speed and the linear direction, the upper supporting frame, the connecting rod transmission assembly and the guiding limiting wheel are integrated into each fine grinding unit, the upper supporting frame, the connecting rod transmission assembly and the guiding limiting wheel are used for adjusting core technological parameters, and the guiding limiting wheel and the angle adjusting are synchronously moved, so that the high stability of the track of the grinding belt is ensured. The configuration endows the grinding machine with dynamic adjustment capability, and the grinding mode can be switched according to the shape, hardness and the like of a workpiece area in one-time processing, so that flexible processing is realized.
The accurate grinding belt is adopted to replace the traditional grinding wheel, the ductility and the microcosmic consistency are better, and the guide limit wheels on two sides resist deflection or vibration by actively restraining and correcting the track, so that the accurate grinding belt is a core mechanical restraint for controlling the grinding precision, and the position precision of the grinding surface is ensured.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application as claimed.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the application and together with the description, serve to explain the principles of the application. Meanwhile, these drawings and the written description are not intended to limit the scope of the inventive concept in any way, but to illustrate the inventive concept to those skilled in the art by referring to specific embodiments.
Fig. 1 is a schematic diagram of the overall structure of a finish grinding machine for producing die steel according to an embodiment of the invention.
Fig. 2 is a schematic structural view of a fine grinding chamber according to an embodiment of the present invention.
Fig. 3 is a schematic view showing the installation of the cold air circulating device and the fine grinding machine set according to the embodiment of the present invention.
Fig. 4 is a schematic structural diagram of a workpiece conveying machine according to an embodiment of the present invention.
Fig. 5 is a schematic structural diagram of a cold air circulation device according to an embodiment of the present invention.
Fig. 6 is a schematic structural diagram of a workpiece support carrier assembly according to an embodiment of the present invention.
Fig. 7 is a schematic structural diagram of a lower belt roller according to an embodiment of the present invention.
Fig. 8 is a schematic structural diagram of a link transmission assembly according to an embodiment of the present invention.
Fig. 9 is a schematic structural view of an upper belt roller according to an embodiment of the present invention.
Fig. 10 is a schematic view of the structure of the area a in fig. 9 according to the present invention.
Fig. 11 is a schematic structural view of a guiding limiting wheel according to an embodiment of the present invention.
In the figure, 1, a main processing machine tool; 11, a main support base; 12, a machine tool supporting foot pad; 13, a fine grinding carriage body base, 14, a transmission table support base, 15, a fine grinding carriage, 16, a top hoisting bracket, 17, a side auxiliary support frame, 2, a machine tool moving guide rail platform, 3, a workpiece transmission machine table, 31, a machine table main support frame, 32, an inner support frame plate, a workpiece transmission roller, 34, a side protection bracket, 35, a bottom limit base frame, 36, a side limit guide wheel, 37, an adjusting screw, 4, a cold air circulating device, 41, a cold air conveying nozzle, 42, a cold air storage box body, 43, an air flow diffusion guide sheet, 44, a hoisting connecting rod, 5, a workpiece support carrier assembly, 51, a carrier main base, 52, a structure reinforcing support block, 53, an inner support base frame, 54, an inner sliding guide rail, 55, a support conveying roller, 56, a synchronous transmission wheel, 57, a workpiece clamping positioning disk, 58, a support fixing seat, 59, a fixed support bearing, 6, a fine grinding machine set, 61, a set inner fixing frame, 611, a frame connecting fixing seat, 612, a jack-up driving cylinder, 613, a jack-up driving push rod, 614, a turnover support bracket, 62, a turnover support bracket, 622, a guide support frame, a lower support frame, a guide support frame, a lower support frame, a frame support frame, a positioning frame support positioning frame positioning frame positioning, swing driving machine frame 655, steering supporting base 656, shaft frame end supporting rod, 657, lateral side supporting frame, 658, lateral side protecting frame 66, upper driving belt roller, 661, upper roller body, 662, roller body supporting shaft 663, roller body mounting frame 67, lower supporting frame and 7, fine grinding processing belt.
Detailed Description
The technical solutions according to the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings, examples of which are shown in the accompanying drawings. When the following description refers to the accompanying drawings, like numerals in the various drawings refer to like or similar elements, unless otherwise specified.
It will be apparent that the described embodiments are only some, but not all, embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Specific implementations of the invention are described in detail below in connection with specific embodiments.
Referring to fig. 1 to 3, an embodiment of a finish grinding machine for producing die steel is provided, which includes a main processing machine 1, a machine moving rail platform 2, and two workpiece transfer platforms 3 arranged side by side. The main processing machine tool 1 is a core supporting and processing unit of the whole grinding machine. The basic structure of the machine tool is composed of a main support base 11, and machine tool support foot pads 12 are respectively arranged at the bottoms of two sides of the main support base 11 and used for stably supporting the whole equipment and adjusting the level. A fine grinding carriage base 13 is fixedly installed at the top center of the main support base 11. Meanwhile, above the corresponding position of each machine tool support foot pad 12, a raised transfer table support base 14 is provided. The two workpiece conveying machine tables 3 are respectively erected on the corresponding conveying table supporting bases 14 and are used for conveying the die steel workpieces to be processed and processed. Two ends of the fine grinding carriage base 13 in the length direction are respectively fixedly provided with one (i.e. two) moving guide rail platforms 2 of the machine tool. The structural design of each machine tool moving guide rail platform 2 ensures that the machine tool moving guide rail platform can be accurately and seamlessly connected and butted with the corresponding workpiece conveying machine table 3, and a coherent material conveying channel is formed, so that workpieces can be stably and accurately conveyed between conveying and processing areas.
At the top of the refiner housing base 13, a closed refiner chamber 15 is provided to provide a stable environment for the refining operation. The interior space of the finishing chamber 15 integrates the core machining, workpiece support and environmental control components.
The workpiece support carrier assembly 5 is fixedly arranged in the central area of the bottom of the finish grinding processing carriage 15, and provides accurate and stable bearing and positioning for the die steel workpiece in the grinding process. The two ends of the workpiece support carrier assembly 5 in the length direction are opened, and the two ends of the workpiece support carrier assembly can be accurately butted with the left machine tool moving guide rail platform 2 and the right machine tool moving guide rail platform respectively through the structural design, so that the workpiece can be ensured to be smoothly input into and output from the accurate grinding station through the guide rail platform. Inside the finishing chamber 15, in the longitudinal direction of the workpiece support carrier assembly 5 (i.e. the workpiece transport and processing direction), a plurality of finishing units 6 and a plurality of cold air circulation devices 4 are provided. The fine grinding machine units 6 and the cold air circulation device 4 are arranged in a staggered manner in sequence. In particular, a cold air circulation device 4 is arranged immediately after the first finishing unit 6, and the next finishing unit 6 is arranged immediately after the cold air circulation device 4, seen in the workpiece processing advancement direction, so that the circulation is staggered. All the cold air circulation devices 4 are installed and fixed at the top of the compartment body cavity of the fine grinding compartment 15 in a hoisting mode, so that the high-efficiency cold air energy of the cold air circulation devices covers the workpiece grinding area from above. All the finishing units 6 are mounted and fixed inside the carriage body of the finishing carriage 15 by respective supporting structures and are positioned precisely directly above the workpiece rest carrier assembly 5, so that their grinding action points can act precisely on the workpiece surface carried on the workpiece rest carrier assembly 5.
Each refiner set 6 is an execution unit for achieving high precision grinding and its structure comprises a rigid set internal fixed frame 61. The fixed frame provides structural support for the entire unit. An upper support frame 65 is provided above the unit inner fixing frame 61 by a movable connection mechanism. On this upper support frame 65, an upper belt roller 66 is rotatably mounted. Correspondingly, a lower support frame 67 is also provided below the unit internal fixation frame 61. The lower support frame 67 has mounted thereon a rotatable lower belt roller 63. A continuous, fine grinding belt 7 with defined abrasive grain characteristics is fed between the upper belt roller 66 and the lower belt roller 63. One of the belt rollers is driven to rotate through the transmission system, so that the fine grinding processing belt 7 can be driven to circularly run at a high speed, and the work section can grind a workpiece. The key structure is that the upper supporting frame 65 can be adjusted relative to the fixed frame 61 in the machine set, and the adjustment can change the space position of the upper driving belt roller 66 relative to the lower driving belt roller 63, so as to accurately adjust the action angle of the grinding working section of the fine grinding processing belt 7 to adapt to the grinding requirements of different workpiece surfaces. A set of link transmission assemblies 62 are also mounted on the set internal fixed frame 61. The function of which is to directly connect and control the rotation of the lower belt roller 63. The rotational speed of the lower belt roller 63 can be steplessly or stepwise adjusted by means of the link drive assembly 62, whereby the linear speed (finish grinding rate) of the finish grinding belt 7 can be precisely controlled and the rotational direction (finish grinding direction, e.g. finish grinding or up-grind) can be controlled to meet the optimum grinding conditions for different materials and precision requirements. Furthermore, at least one pair of guiding and limiting wheels 64 are symmetrically arranged on both sides of the set internal fixation frame 61 (generally corresponding to both sides of the running direction of the finishing belt 7). These guiding and limiting wheels 64 are connected to a driving mechanism for adjusting the upper belt roller 66 by a linkage mechanism, ensuring that the guiding and limiting wheels 64 can move synchronously when the position of the upper belt roller 66 is adjusted to change the refining direction of the refining belt 7. The guiding and limiting wheels 64 are used for closing and restraining the two side edges or specific positions of the belt body of the fine grinding belt 7, applying guiding and lateral limiting forces to the belt body running at high speed, ensuring that the fine grinding belt 7 always keeps accurate track and stably runs even after angle or position adjustment, and avoiding deflection or distortion, thereby controlling the overall grinding precision and preventing the work piece out of tolerance caused by deviation.
The working procedure of this embodiment is designed as follows:
1. workpiece conveying and feeding, namely, placing a die steel workpiece to be refined on one of the workpiece conveying machine tables 3. The workpiece conveying machine table 3 is started to stably convey the workpiece to the inlet end of the machine tool moving guide rail platform 2 which is in butt joint with the workpiece conveying machine table.
2. Entering the finish grinding area, namely, the machine tool moving guide rail platform 2 works, receives and continues to convey the workpiece, accurately conveys the workpiece into the finish grinding processing carriage 15 through the interface of the workpiece moving guide rail platform and the workpiece supporting carrier assembly 5, and is positioned on the workpiece supporting carrier assembly 5. At the same time or slightly earlier, the workpiece transport machine 3 at the other end is ready to receive a finished workpiece (the process being coordinated by the control system in a continuous process).
3. The workpiece positioned on the workpiece support carrier assembly 5 is driven by a driving device (or by a conveying device of the workpiece, such as a roller or a chain), and moves at a constant speed along the trend (usually the longitudinal direction) of the workpiece support carrier assembly 5. When the workpiece moves under the first finishing unit 6, the finishing belt 7 of the unit performs the first finishing of the surface of the workpiece at a high speed operation, removing the allowance and improving the surface flatness. Immediately thereafter, the workpiece moves into the area below the first cold air circulation device 4. The device is started, low-temperature cold air is forcefully blown downwards to the surface of the workpiece just ground, forced cooling is carried out, local high heat generated by grinding is rapidly taken away, thermal deformation of the workpiece is effectively restrained, and burn is avoided. Subsequently, the workpiece enters under the next finishing unit 6, and a second finishing operation is performed, further improving the accuracy and surface quality, after which it is subjected to the cooling cycle of the next cold air circulation device 4 again. The above-described staggered arrangement flow of "refiner (set) -cooler (device) -refiner (set) -cooler (device)" is repeated until the workpiece sequentially passes through all the processing and cooling stations preset in the refiner processing box 15, completing the entire refiner flow.
4. And (b) controlling the fine grinding process, namely, when each fine grinding machine unit 6 grinds a workpiece, the position of the upper driving belt roller 66 can be dynamically changed by adjusting the position of the upper supporting frame 65 of the unit according to the specific requirement of the current workpiece, so that the fine grinding direction (contact angle) of the fine grinding machine belt 7 and the workpiece can be adjusted in real time. b. By controlling the link drive assembly 62 of the unit, the rotational speed and direction of rotation of the lower belt roller 63 can be adjusted to precisely control the refining rate (linear velocity) and the refining direction (cis/up-grind) of the refining belt 7. c. When the adjustment of the item a and the item b is carried out, the guide limit wheels 64 automatically and synchronously move under the action of the driving mechanism, and constraint force is always applied to the two sides of the fine grinding processing belt 7, so that the accurate and stable belt position is ensured, the belt does not deflect, and the accuracy of controlling the grinding track is ensured.
5. And outputting the workpiece, namely finishing finish grinding and cooling the workpiece, moving out from the other end of the workpiece by the conveying of the workpiece support carrier assembly 5, and stably transferring the workpiece to a corresponding workpiece conveying machine table 3 at the side through a machine tool moving guide rail platform 2 at the end. The workpiece conveying machine 3 is started immediately, and the die steel workpiece after finish grinding is conveyed to be off line.
The present embodiment adopts the staggered multi-stage grinding cooling principle, and makes the fine grinding machine set 6 and the cold air circulation device 4 follow the sequential staggered arrangement mode of the processing machine set-cooling device-processing machine set-cooling device along the trend of the workpiece support carrier assembly 5, so that targeted strong cooling is performed immediately after each local grinding. The principle breaks through the traditional continuous grinding (post cooling) or dispersed cooling mode, realizes that the single grinding heat is not rapidly cooled before a large amount of accumulated and diffused heat is generated in the workpiece, reduces the peak temperature of a grinding area to the greatest extent, and particularly solves the problems of microstructure burn (tempering or secondary quenching) and macroscopic thermal deformation caused by heat accumulation, which are extremely easy to occur in the lower die steel for continuous grinding and heavy-load grinding for a long time.
The combined configuration of the upper support frame 65, the link drive assembly 62 and the guide limit wheels 64 is integrated in each finishing train 6. The adjustment of the position of the upper support frame 65 changes the angle of action (finish direction) of the grinding belt and the link drive assembly 62 precisely controls the linear speed (finish rate) and direction (finish direction) of the grinding belt, both actions being core process parameter adjustments. The guide limit wheel 64 is a key guarantee mechanism which moves synchronously with the angle adjusting action, and ensures that the running track of the grinding belt always keeps extremely high stability when the grinding angle and speed are changed. The principle gives the grinder the capability of timely and dynamically adjusting the technological parameters, so that in one processing flow, different grinding modes (angle, speed and direction) can be switched according to the shape of different areas of a workpiece, the change of material hardness or special precision requirements, and flexible processing is realized.
The present embodiment uses the finishing belt 7 as a grinding medium, which has better ductility and micro-consistency than conventional grinding wheels. The guiding limit wheels 64 arranged at key positions (two sides) of the running path of the grinding belt actively apply constraint force under the condition of changing processing parameters or long-term working load, continuously correct the running track of the grinding belt, and effectively resist potential deflection or vibration. This principle acts directly on ensuring the position accuracy of the grinding line/face and is a core mechanical constraint mechanism for controlling the grinding accuracy.
The embodiment of the invention provides a high-efficiency solution for fine grinding processing of die steel, especially high-precision and complex-molded-surface die steel parts through the innovative mechanical structure layout, dynamic parameter adjustment and precision guarantee mechanism and the accompanying high-efficiency thermal management flow, and comprehensively realizes multiple targets of high efficiency, high quality (high precision and no thermal damage), high flexibility and high equipment durability.
In the second embodiment, referring to fig. 1 and 4, the structure of the workpiece conveying machine 3 is further refined based on the finish grinding machine for producing die steel in the first embodiment.
Each workpiece transfer station 3 is a critical transfer unit for carrying and transporting die steel workpieces to be machined or processed. The main structure includes a rigid and longitudinally extending main frame support 31 that provides the basic support and contour positioning for the entire conveyor. A parallel inner support frame plate 32 is fixedly provided along the inner edge of the frame body of the main support frame 31 of the machine. These inner support frame plates 32 are distributed along the length of the machine to act as reinforcing structures and provide mounting bases.
Between the parallel inner support frame plates 32, a plurality of work conveying rollers 33 are installed at intervals in the longitudinal direction of the machine. The journals at both ends of each workpiece conveying roller 33 are internally and penetratingly mounted in the corresponding side walls of the main stand support 31. The key driving structure is that the same end of all the workpiece conveying rollers 33 is provided with a transmission gear. The gears are interconnected by one or more encircling gear belts and powered by a drive motor. The synchronous driving mode of the gear belt ensures that the rotation speeds of all the workpiece conveying rollers 33 are completely consistent, thereby ensuring that the workpieces can stably and uniformly move on the workpiece conveying machine table 3 and avoiding workpiece deviation or clamping stagnation caused by roller speed difference.
In order to further improve the positioning accuracy of the workpiece during the conveying process, particularly to prevent the workpiece from shifting or shaking in the lateral direction, two sets of firm lateral protection brackets 34 are fixedly arranged below the frame body of the main support 31 of the machine, and are respectively positioned at two sides of the width direction of the machine. The two lateral guard brackets 34 are disposed parallel to the length of the machine and support the positioning adjustment mechanism of the core along its length.
The adjusting mechanism formed by the bottom limit base frame 35 and the adjusting screw 37 is provided with a plurality of lateral limit guide wheels 36 on the top platform of the bottom limit base frame 35 along the length direction of the machine. These lateral limit guides 36 are typically free-wheeling rollers or bearing structures, and the lateral limit guides 36 on the same side are aligned in a row along the length of the machine. More importantly, the mounting position of the lateral limit guide wheel 36 is precisely calculated so that the lateral limit guide wheel can pass through the gap between the adjacent roller bodies of the workpiece conveying rollers 33, and the top working surface of the lateral limit guide wheel is slightly higher than the working surface of the workpiece conveying rollers 33.
The lateral limit rollers 36 arranged in rows form a continuous, rollable guide barrier in the conveying direction. The principle ensures that the whole side edge of the workpiece can obtain uniform and low-friction constraint force in the whole transmission process. Compared with a limiting block in point contact or intermittent contact, the linear continuous guide wheel constraint greatly improves positioning stability, reduces guide resistance and potential scratch risk, and ensures the precision of the linear motion of the workpiece.
Referring to fig. 2, 3 and 5, in this embodiment, on the basis of the finish grinding machine for producing die steel in the first embodiment, the specific structure and working principle of the cold air circulation device 4 are specifically and optimally designed:
In the first embodiment, a top hoisting bracket 16 is fixedly arranged at the top of the inner cavity of the fine grinding processing chamber 15. The support is a rigid beam structure which is crisscrossed vertically and horizontally, and provides stable and reliable suspension supporting points for the cold air circulating device. The core cold air circulation device 4 of the present embodiment has a hollow cold air storage box 42 as a main body. The cabinet is designed to receive and temporarily store cryogenic cold air (e.g., cryogenic dry air or nitrogen) supplied from an external refrigeration system (not shown). The cold air storage box 42 is suspended by a plurality of (typically 4 or more symmetrically distributed) hanger bars 44 provided at the peripheral edges or specific connection points thereof.
The cold air storage box 42 has a flat trapezoidal structure as a whole. Along the main direction of the flow of the gas inside it, i.e. from the end of the cold gas delivery nozzle 41 (inlet end) to the side of the gas flow diffusion guide 43 (bottom side, outlet end), the thickness of the inner space (the inner dimension of the box perpendicular to the bottom direction) tends to decrease gradually, while the width of the inner space (the inner dimension of the box parallel to the bottom and perpendicular to the main direction of the gas flow) tends to increase gradually. This carefully designed internal space tapering characteristic plays a critical regulatory role in airflow flow. An airflow diffusing guide piece 43 is provided at the bottom of the cold air storage box 42. The airflow diffusing guide piece 43 is not a flat plate, but is constituted by a plurality of elongated inclined stripe structures (or called guide pieces) arranged in parallel. Each deflector has a specific inclination angle (for example 30 ° -60 °) which is designed to direct the air flow exiting the interior of the tank towards the area desired to be covered.
After the cold air enters the box body, a preliminary buffer and speed reduction are obtained in a thicker space at the front section in the box body, and the injection impact is relieved. The gas flow then follows the main direction of the space in the tank (from the inlet end to the outlet end). During this flow, the flow channels are progressively compressed in the height direction, in which direction the flow velocity of the air flow is passively accelerated (venturi effect reverse application) due to the progressive reduction of the thickness of the space inside the tank. Meanwhile, because the space width in the box body is gradually increased, the air flow has space to be naturally diffused in the width direction. This combined effect of "compression + diffusion" causes the concentrated high velocity jet from cold gas delivery nozzle 41 to be effectively converted to a relatively low velocity fluid with a more uniform flow rate and wider coverage (matching grinding bandwidth).
The embodiment changes the traditional concentrated cooling into efficient, uniform and directional wide-area cooling, perfectly realizes the accurate temperature management of a high-temperature area in the accurate grinding process, effectively inhibits the thermal damage, provides strong hardware support for the staggered cooling mechanism provided in the first embodiment, and finally ensures the high-quality output of the accurate grinding of the die steel together.
In a fourth embodiment, referring to fig. 2 to 9, the structure of the workpiece support carrier assembly 5 and the linkage supporting and adjusting mechanism of the fine grinding machine set 6 are described in detail on the basis of the fine grinding machine for producing die steel in the first embodiment.
The workpiece support carrier assembly 5 is a core carrying and conveying unit of the grinding machine, and is precisely erected at the bottom of the fine grinding processing carriage 15. The main structure of the grinding machine comprises a main base 51 of a rigid carrier which is respectively arranged at two sides (length direction) of a base 13 of a grinding carriage body. On each carrier main base 51, a plurality of structural reinforcing struts 52 are fixedly mounted to enhance the overall rigidity. An inner support chassis 53 is supported along the longitudinal direction between the carrier main bases 51 on both sides. To provide greater load bearing stability and mounting base, the inner edge of the inner support chassis 53 (near the central region of the vehicle) is precisely provided with an inner slide rail 54.
The critical workpiece carrying and conveying unit is arranged between the inner supporting underframe 53 at two sides, and a plurality of supporting conveying rollers 55 are arranged at intervals along the length direction of the carrier. The unique design of these lug conveyor rollers 55 is that each two are mounted in a set. In each set, a workpiece clamping positioning disc 57 is mounted on both ends of the supporting and conveying roller 55 through a synchronous driving wheel 56 (such as a gear or a chain wheel). Importantly, the workpiece clamping puck 57 is not directly secured to the roller and is slidably mounted at its bottom to the aforementioned internal slide rail 54 by a suitable structure, such as a slider. This design allows an operator or drive mechanism (e.g., a lead screw nut or hydraulic cylinder, not shown) to flexibly adjust the spacing of each set of lug conveyor rollers 55 by moving the position of the workpiece clamping puck 57 on the guide rail, thereby accommodating the support and conveyance requirements for workpieces of different lengths. The synchronous drive 56 ensures complete synchronization of the rotation of the two rollers of the same set, preventing tilting of the workpiece.
The key support relationship of the finishing unit 6 and its linkage structure is further defined:
A lateral auxiliary support 17 is fixedly mounted on the inner side wall of the finishing chamber 15. The internal fixing frame 61 of the fine grinding machine set 6 has high structural strength, and one end of the internal fixing frame is fixedly arranged on the lateral auxiliary supporting frame 17 to obtain stable lateral support. The other end of the unit internal fixation frame 61 is supported on a lower support frame 67 below. While the bottom of the lower support frame 67 is secured to the inner support chassis 53 on the corresponding side of the workpiece support carrier assembly 5. This arrangement forms a complete and robust sandwich-type supporting and conducting system of "wall mount-unit frame-lower support frame-carrier chassis" that effectively distributes grinding forces to the carrier base and base of the large foundation.
The lower driving belt roller 63 is a key driving roller for driving the fine grinding processing belt 7 to operate, and the structure of the lower driving belt roller comprises a central supporting shaft section 631, and a lower roller body 634 which is in contact with the grinding belt is sleeved and fixed on the supporting shaft section 631. One end of the support shaft section 631 is provided with a rotation shaft section 633, and the rotation shaft section 633 is mounted on the lower support frame 67 through a precision bearing to realize rotation support. The other end of the support shaft section 631 is provided with a shaft end support 632. The carrier main base 51 is provided with a support fixing base 58, and a high-precision and high-rigidity fixed support bearing 59 is mounted on the support fixing base 58. The shaft end support 632 is fixedly mounted directly on the corresponding fixed support bearing 59. In this way, one end of the lower belt roller 63 is rotatable (driven end) on the lower support frame 67, and the other end thereof is rigidly and fixedly supported (fixed end) on the carrier main base 51 through the fixed support bearing 59, so as to form an extremely stable double-support structure, and suppress radial runout of the driving roller to the greatest extent.
At the bottom of the lower support frame 67 (near the rotation axis section 633) a bottom support bar 625 is provided vertically downward. The top end of the bottom support rod 625 is mounted with a steering connection sleeve 626 through a freely movable swing joint (e.g., a universal joint or a ball joint). The end of the rotation shaft segment 633 (i.e. the drive input) is fixed in the steering connection sleeve 626. The steering connection sleeve 626 is the junction of the power transmission and steering adjustment.
The linkage assembly 62 is a core actuator that drives the lower belt roller 63 in rotation (speed and direction). When the transmission shaft 621 rotates, the transmission driving link 623 is driven by the connection rotation bolt 622, and the swing driving arm 624 is driven to perform a swing motion. The oscillating drive arm 624 acts on the steering connection sleeve 626, since the rotating shaft segment 633 is fixed therein, thus forcing the rotating shaft segment 633 (i.e. the lower belt roller 63) to rotate about its own axis. By controlling the rotation angle and speed of the transmission shaft 621, the finish grinding rate (linear speed) and direction (normal/reverse rotation) of the finish grinding belt 7 can be precisely adjusted.
For the support and angular adjustment of the upper belt roller 66, this embodiment is designed as follows:
The upper belt roller 66 is a key driven roller for adjusting the angle and tension of the grinding belt, and its structure includes a support main body roller body mounting bracket 663, and an upper roller body 661 rotatably supported by a roller body support shaft 662 and mounted on the roller body mounting bracket 663. A frame connection fixing base 611 is provided at a middle position of the unit internal fixing frame 61. On the frame connection fixing base 611, a lift driving cylinder 612 (or other linear actuator such as a hydraulic cylinder) is installed. The piston rod end of the lift drive cylinder 612 is provided with a lift drive push rod 613. The bottom (non-roll end) of the roll mounting bracket 663 is mounted to the support end of the jacking drive ram 613 by a rigid flip bracket 614 (shaped like an L-bracket or bracket arm). In this way, the telescoping action of the lift drive cylinder 612 can directly raise or lower one end of the roll body mounting bracket 663 via the lift drive ram 613 and the roll-over bracket 614, thereby changing the spatial inclination of the entire upper belt roll 66 (i.e., the finish grinding orientation of the grinding belt working segment).
In order to stably support the other end of the roller mounting bracket 663 and to achieve a stable angle change, an upper support frame 65 is further provided on the set internal fixing frame 61.
The specific structure of the upper support frame 65 includes a frame support base 651 fixed to the unit frame, a set of precise steering adjustment devices 652 mounted on the frame support base 651, and an adjustment rotating shaft 653 mounted at an output end (driving end) of the steering adjustment devices 652. At the other end of the panel surface of the frame support base 651, a steering support base 655 is mounted. Mounted on the steering support base 655 is a swing drive housing 654 (e.g., bell crank or sector gear rack). The shaft end of the adjusting rotation shaft 653 is connected to the center or one end of the swing drive frame 654 by a coupler or a key groove. The top of the swing drive frame 654 is provided with a pedestal end support bar 656, the pedestal end support bar 656 being supported at the bottom of the roll body mounting bracket 663.
When it is necessary to adjust the grinding angle, first, the steering adjusting device 652 is driven to rotate the adjusting rotation shaft 653. The adjustment rotation shaft 653 drives the swing drive frame 654 to swing about its fulcrum on the steering support base 655. The oscillating motion of the oscillating drive frame 654 is transmitted through the pedestal end support pole 656, imparting an elevating or lateral displacement (depending on the direction of oscillation) to the bottom other end of the roll body mounting bracket 663. This action cooperates with the lifting drive of the lifting drive ram 613 to the bottom end of the roll body mounting bracket 663 by the combined action of the lifting drive ram 612, effecting a spatially stable change in the angle of inclination of the roll body mounting bracket 663, i.e., precisely driving the upper belt roll 66, and more precisely adjusting the relative position and angle of the grinding segments formed by the lower belt roll 63 and the upper belt roll 66 together to form the desired refined grinding orientation.
According to the embodiment, through the cooperative design of the adjustable structure in the workpiece support carrier assembly 5, the rigid linkage support of the fine grinding machine unit 6 and the base, the revolutionary double-support structure of the lower core transmission belt roller 63 and the angle adjustment mechanism of the upper transmission belt roller 66, the high flexibility of the workpiece support, the maximization of the system rigidity, the leap improvement of the transmission stability and the precision of grinding parameter adjustment are realized, and a core hardware foundation meeting the fine grinding of high-precision and high-efficiency die steel is jointly constructed.
In the fifth embodiment, referring to fig. 3, 9, 10 and 11, the precise mounting structure of the guiding and limiting wheel 64 and the design of the two half wheels are further clarified based on the structure described in the fourth embodiment, and the mechanical linkage relationship between the guiding and limiting wheel and the swing driving frame 654 is clarified:
On the side edges (typically on both sides in the length direction) of the swing drive frame 654, a solid lateral side bracket 657 is provided. Which is an extension of the body structure of the swing drive housing 654.
From each lateral side bracket 657, a side guard bracket 658 extends outwardly (away from the center of the swing drive frame 654). The side guard bracket 658 is a rigid support arm that is configured at its distal end to mount the guide limit wheel 64 and precisely position the wheel body near the edge line of the finishing belt 7.
Each guide limit wheel 64 is composed of the following key components:
The wheel mount 641 is a base structure that is secured to a predetermined mounting hole on the side guard bracket 658 by bolts or a tight fit.
Hub 642 is an elongated spindle with its root (inner end) mounted to wheel mount 641 by means of bearings or interference fit, or the like, ensuring free rotation about its own axis.
Left half guide 643 and right half guide 644, which are two key friction guide components. They each have a rim (the working surface in contact with the grinding belt) that is sleeved in parallel on the outer cylindrical surface of the hub 642. The two half wheels may rotate independently or float slightly on hub 642. Importantly, the left guide wheel 643 and the right guide wheel 644 do not closely fit, but rather remain and form a guide limit gap 645 of precise width. The width of this gap is carefully calculated and manufactured to be slightly larger than the thickness of the corresponding edge of the finishing belt 7 (e.g. the thickness of the belt body edge + a few margins). The wheel body running surface formed by the left half guide wheel 643 and the right half guide wheel 644 can be stably fitted into the running track edge of the fine grinding belt 7 through the guide limit gap 645.
At the moment and throughout the course of the change of the refining direction leading to a corresponding adjustment of the running path (angle, position) of the refining strip 7:
The side edges (edges) of the finishing strip 7 are always embedded in the guiding limit gaps 645 of the respective guiding limit wheels 64. Since the guide limit wheels 64 are mechanically rigidly connected to the drive angle-adjusted wobble drive frame 654, their movements are completely synchronized. Thus, whichever new position in space the refining belt 7 moves due to the angular adjustment, the guiding and limiting wheel 64 responsible for constraining its edge will "follow" it synchronously to the new corresponding position. The edge of the refining belt 7 is always constrained to run in the guide limit gap 645 during high speed operation. The left and right guide wheels 643, 644 are free to rotate under the lateral forces of the belt body, providing a low friction rolling constraint. This "concomitantly constrained" of full synchronization ensures that the edge of the finishing belt 7 is always subjected to the exact lateral guiding forces exerted by the guiding limit wheel 64 in the correct position throughout the finishing direction change and any adjustment position thereafter, perfectly avoiding temporary strip removal, deviation or twisting due to angle or position changes. The high stability and accuracy of the belt running track are maintained.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Furthermore, it should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is provided for clarity only, and that the disclosure is not limited to the embodiments described in detail below, and that the embodiments described in the examples may be combined as appropriate to form other embodiments that will be apparent to those skilled in the art.
Claims (10)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202511550121.8A CN121018336A (en) | 2025-10-28 | 2025-10-28 | A precision grinding machine for mold steel production |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202511550121.8A CN121018336A (en) | 2025-10-28 | 2025-10-28 | A precision grinding machine for mold steel production |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN121018336A true CN121018336A (en) | 2025-11-28 |
Family
ID=97774841
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202511550121.8A Pending CN121018336A (en) | 2025-10-28 | 2025-10-28 | A precision grinding machine for mold steel production |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN121018336A (en) |
-
2025
- 2025-10-28 CN CN202511550121.8A patent/CN121018336A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN121018336A (en) | A precision grinding machine for mold steel production | |
| CN113319724A (en) | Bottle shoulder special plane of polishing | |
| RU188497U1 (en) | Rail grinding unit | |
| CN115106896B (en) | A wire drawing machine | |
| CN219255166U (en) | Online polishing machine for aluminum profile | |
| CN215236931U (en) | Operation side moving type straightener combined rack | |
| CN118321748A (en) | Automatic go up laser pipe cutting machine of unloading function | |
| CN206623593U (en) | A kind of embossing device for sheet fabrication | |
| CN113829111B (en) | Automatic feeding and discharging mechanism of intelligent manufacturing flexible production line | |
| KR20030026019A (en) | An apparatus for moving steel plate for cooling | |
| CN113458195B (en) | Numerical control universal plate rolling machine with rear discharging plate amplitude adjusting structure and method | |
| CN116141171A (en) | Online polishing machine for aluminum profile | |
| CN223405657U (en) | Transverse track mechanism and transverse roller changing device | |
| CN222874134U (en) | Wire drawing machine | |
| CN217800842U (en) | Wire drawing compensation mechanism | |
| CN223235911U (en) | Steel ingot sharpening machine | |
| CN217800843U (en) | Wire drawing mechanism | |
| CN120115587B (en) | A spinning machine | |
| CN222845835U (en) | A double-station discharging device for steel pipe processing | |
| CN112355870A (en) | Panel burnishing machine | |
| CN218613398U (en) | Automatic go up super smart machine of unloading | |
| CN223002166U (en) | Width adjustable track conveying device | |
| CN217344296U (en) | Trolley platform for replacing carrier roller of belt conveyor | |
| CN117536035B (en) | Fixed five-axis linkage rail profile intelligent polishing equipment | |
| CN218461729U (en) | Casting edge trimming device suitable for production of sewage discharge pump shell |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication |