CN112129162A - Firearm suppressor and method of manufacture - Google Patents
Firearm suppressor and method of manufacture Download PDFInfo
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- CN112129162A CN112129162A CN202010844815.3A CN202010844815A CN112129162A CN 112129162 A CN112129162 A CN 112129162A CN 202010844815 A CN202010844815 A CN 202010844815A CN 112129162 A CN112129162 A CN 112129162A
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- 238000007639 printing Methods 0.000 claims description 34
- 230000003584 silencer Effects 0.000 claims description 30
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Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F41—WEAPONS
- F41A—FUNCTIONAL FEATURES OR DETAILS COMMON TO BOTH SMALLARMS AND ORDNANCE, e.g. CANNONS; MOUNTINGS FOR SMALLARMS OR ORDNANCE
- F41A21/00—Barrels; Gun tubes; Muzzle attachments; Barrel mounting means
- F41A21/30—Silencers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/10—Sintering only
- B22F3/11—Making porous workpieces or articles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F5/00—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
- B22F5/10—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product of articles with cavities or holes, not otherwise provided for in the preceding subgroups
- B22F5/106—Tube or ring forms
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y10/00—Processes of additive manufacturing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y80/00—Products made by additive manufacturing
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Powder Metallurgy (AREA)
Abstract
The embodiment of the invention provides a firearm suppressor and a manufacturing method thereof, wherein the suppressor comprises an outer pipe body, an inner pipe body and a silencing body, wherein the outer pipe body and the inner pipe body are sleeved with each other; at least the noise reduction body is connected with the outer pipe body and the inner pipe body in a 3D printing and forming mode; the silencing bodies are distributed between the outer pipe body and the inner pipe body in a grid shape. According to the firearm suppressor and the manufacturing method provided by the embodiment of the invention, the suppressor is processed and molded by a 3D printing technology, so that the noise of the firearm is reduced, the hearing safety of a shooter is ensured, and meanwhile, a product is directly manufactured by using a selective laser sintering 3D printing technology, so that the manufacturing limitless performance is exerted; the automatic production equipment is utilized to reduce the mixing degree of ginseng and reduce factors influencing the product quality.
Description
Technical Field
The invention relates to the technical field of firearms, in particular to a firearm suppressor and a manufacturing method thereof.
Background
The muzzle suppressor (also called as a silencer) is a device attached to the muzzle end of a firearm, and when a bullet is shot out through the muzzle, high-pressure gas is dispersed and discharged by using the structural characteristics of the suppressor, so that the effect of silencing is achieved, and the hearing safety of a designer is ensured; on the other hand, the gas force acts on the structure of the suppressor, thereby reducing the recoil of the gun, improving the shooting precision and ensuring the physical safety of a shooter.
The most widely used steel suppressors at present have the following production technical routes: and cutting and blanking by using electric sparks, processing a steel blank into parts by reducing the material through a numerical control lathe, and welding a plurality of different parts into a whole to obtain a product. But the existing production method has more serious defects, such as high tooling and material cost; the production period is long, and the automation degree is low; structural design is limited; the product performance is inconsistent; excessive weight, etc.
The present invention has been made in view of the above.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention provides a firearm suppressor and aims to overcome the defects in the production and manufacturing process of the firearm suppressor in the prior art, the suppressor is processed and molded by a 3D printing technology, so that the noise of the firearm is reduced, the hearing safety of a shooter is ensured, and meanwhile, a product is directly manufactured by using a selective laser sintering 3D printing technology to play the limitless manufacturing performance; the automatic production equipment is utilized to reduce the mixing degree of ginseng and reduce factors influencing the product quality.
The invention further provides a manufacturing method of the firearm suppressor, which is used for overcoming the defects of a conventional processing method in the prior art, the suppressor is manufactured through a 3D printing technology, rapid forming is realized, and the suppressor is freely designed and structurally optimized from a design end by utilizing three-dimensional design and simulation software.
A firearm suppressor according to an embodiment of the first aspect of the invention, comprising:
the silencer comprises an outer pipe body, an inner pipe body and a silencer body, wherein the outer pipe body and the inner pipe body are sleeved with each other;
wherein, at least the amortization body is connected with outer body, interior body through 3D printing shaping mode.
According to one embodiment of the invention, the sound-attenuating bodies are distributed in a grid-like manner between the outer pipe body and the inner pipe body.
Particularly, the latticed silencer can be used for effectively carrying out turbulence and pressure relief on high-pressure gas generated by firearm shooting, the latticed silencer is respectively connected with the outer wall of the inner pipe body and the inner wall of the outer pipe body, the high-pressure gas transmitted into the inner pipe body is dispersedly transmitted to the outer pipe body, and the high-pressure gas is prevented from being rapidly transmitted to bring high noise and impact on vibration of a suppressor.
According to one embodiment of the present invention, the sound-absorbing body is any one or a combination of tetrahedrons, hexahedrons, honeycombs and unit cell points.
Particularly, the latticed silencing bodies can be optimized according to the sizes of different suppressors, different types of silencing bodies can be selected, and lattice strengthening treatment is carried out on stress concentration points, so that the overall performance of the suppressors is improved.
According to one embodiment of the invention, a plurality of first through holes are uniformly distributed on the outer tube body, and the first through holes are communicated with the inner space and the outer space of the outer tube body;
a plurality of second through holes are uniformly distributed in the inner pipe body, and the second through holes are communicated with the inner space and the outer space of the inner pipe body.
Particularly, through setting up first through-hole and second through-hole for the high-pressure gas that the firearms sent can obtain timely derivation, realizes the amortization and the damping to the firearms.
According to one embodiment of the invention, the first through hole and/or the second through hole are arranged obliquely from the shooting direction of the firearm round towards the shooting direction.
Specifically, the first through hole and the second through hole are improved in orientation, so that the flow of high-pressure gas in the suppressor is guided, the recoil of the firearm is reduced, and the shooting precision is improved.
It should be noted that, just based on the machine-shaping of 3D printing technology to the inhibitor for the manufacturing process of the first through-hole of slope and second through-hole is more convenient, does not need complicated frock clamp alright realize.
According to one embodiment of the present invention, the first through holes and the second through holes are arranged in a one-to-one correspondence.
Particularly, the first through holes and the second through holes are arranged in a one-to-one correspondence mode, and the dredging effect on high-pressure gas of the firearm can be effectively improved.
In an application scene, first through-hole and second through-hole only are at outer body and interior body radial ascending position one-to-one, and the interior body inner space that the second through-hole switched on finally can be used in the inner wall of amortization body and outer body to the high-pressure gas of exterior space promptly, can realize discharging the gunshot layering, avoids high-pressure gas to discharge to the outside of outer body simultaneously, causes the poor problem of noise cancelling effect.
In an application scene, the incline direction of first through-hole and second through-hole is unanimous, and the axis collineation of first through-hole and second through-hole on the incline direction, and this kind of setting makes the internal high-pressure gas of inner tube that the second through-hole was derived transmit the outer external of body of inhibitor through first through-hole fast, and the inhibitor shake that has brought when having avoided high-pressure gas to strike outer body inner wall, and then drives the shooting precision problem that the shooter shake influences the firearms.
In an application scene, be sliding connection or threaded connection between outer body and the interior body, set up an adjustment mechanism promptly between outer body and interior body, can realize the slip or rotate between outer body and the interior body, and then can adjust the relative position between first through-hole and the second through-hole according to actual demand, provide the demand that satisfies the amortization preferentially or the damping.
Furthermore, the adjusting mechanism can be a slide rail and slide block structure arranged on the inner wall of the outer pipe body and the outer wall of the inner pipe body, and a buckle and a clamping hole for positioning the relative position between the outer pipe body and the inner pipe body; in addition, the adjusting mechanism is also integrally formed with the suppressor through a 3D printing rapid forming technology, namely the sliding rail, the sliding block, the buckle and the clamping hole are all formed through 3D printing.
Furthermore, the adjusting mechanism can be a section of thread arranged on the inner wall of the outer pipe body and one end of the outer part of the inner pipe body, rotation between the outer pipe body and the inner pipe body is realized through the thread, and finally position adjustment between the inner pipe body and the outer pipe body is realized. Furthermore, positioning elements, such as positioning pins, are provided which prevent a displacement between the inner and outer body when no adjustment is required. The adjusting mechanism is also integrally formed with the suppressor through a 3D printing rapid forming technology, namely a thread at one end of the outer wall of the inner pipe body, a thread and a positioning pin at one end of the inner wall of the outer pipe body and the adjusting mechanism are formed through 3D printing, and can also be formed through post-processing.
It should be noted that, when the displacement adjustment can be realized by sliding or rotating between the inner pipe body and the outer pipe body, the silencing body between the outer pipe body and the inner pipe body only occupies a part of position, and abuts against the outer pipe body and/or the inner pipe body, and the transmission function is realized only through contact, but not fixed connection. The part for connecting the inner pipe body and the outer pipe body is arranged between the inner pipe body and the outer pipe body, so that the inner pipe body and the outer pipe body are prevented from being separated.
According to an embodiment of the invention, the aperture of the first through hole is larger than the aperture of the second through hole.
Particularly, the aperture of the first through hole is larger than that of the second through hole, so that high-pressure gas can be ensured to flow out of the suppressor quickly, and the silencing effect is realized.
According to one embodiment of the invention, the outer pipe body, the inner pipe body and the sound-damping body are mainly made of a titanium alloy.
Particularly, titanium alloy powder is used as a raw material, and a 3D printing forming technology is combined, so that the performance of the suppressor can be improved, and the production period can be shortened; meanwhile, the method can realize automatic production, reduce production cost, and obtain products with high quality and low price.
According to one embodiment of the invention, the 3D printing formation is performed by selective laser sintering.
In particular, due to the nature of the suppressor itself and the characteristics of the material, the 3D printing forming technique of selective laser sintering is the best choice among the rapid forming techniques for processing firearms using the suppressor.
According to a second aspect of the present invention, a method for manufacturing the firearm suppressor described above includes the following steps:
calling a three-dimensional model of the suppressor and carrying out slicing treatment;
converting the three-dimensional model of the suppressor subjected to slicing processing into two-dimensional layered cross section information, and obtaining a motion track scanned layer by layer along the height direction;
printing the suppressor on the substrate according to the motion track;
after printing is finished, the substrate and the suppressor are placed in a hot isostatic pressing device for intensity improvement and density increase treatment;
performing stress relief heat treatment on the substrate together with the suppressor;
removing the suppressor by wire cutting;
and carrying out sand blasting treatment on the suppressor through steel balls and ceramic powder, and tapping at a port of the suppressor after the sand blasting is finished.
One or more technical solutions in the embodiments of the present invention have at least one of the following technical effects: according to the firearm suppressor and the manufacturing method provided by the embodiment of the invention, the suppressor is processed and molded by a 3D printing technology, so that the noise of the firearm is reduced, the hearing safety of a shooter is ensured, and meanwhile, a product is directly manufactured by using a selective laser sintering 3D printing technology, so that the manufacturing limitless performance is exerted; the automatic production equipment is utilized to reduce the mixing degree of ginseng and reduce factors influencing the product quality.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.
FIG. 1 is a first schematic view of an assembled relationship of an outer tube, an inner tube, and a silencer in a firearm suppressor according to an embodiment of the present invention;
FIG. 2 is a second schematic view of the assembled relationship of the outer tube, the inner tube and the silencer in the firearm suppressor according to the exemplary embodiment of the present invention;
FIG. 3 is a third schematic view of the assembled relationship of the outer tube, the inner tube and the silencer in the firearm suppressor according to the exemplary embodiment of the present invention;
FIG. 4 is a fourth schematic view of the assembled relationship of the outer tube, the inner tube and the silencer in the firearm suppressor according to the exemplary embodiment of the present invention;
FIG. 5 is a schematic diagram of a print model of an inner tube in a firearm suppressor according to an embodiment of the present invention;
FIG. 6 is a schematic diagram of a printing model of a sound damping body in the firearm suppressor according to the embodiment of the present invention;
fig. 7 is a schematic structural diagram of an outer tube printing model in the firearm suppressor provided in the embodiment of the present invention.
Reference numerals:
1. an outer tubular body; 101. a first through hole;
2. an inner tube body; 201. a second through hole;
3. a sound-deadening body.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the embodiments of the present invention and simplifying the description, but do not indicate or imply that the referred devices or elements must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the embodiments of the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In some embodiments of the invention, as shown in fig. 1-7, the present solution provides a firearm suppressor comprising:
the silencer comprises an outer pipe body 1, an inner pipe body 2 and a silencer body 3, wherein the outer pipe body 1 and the inner pipe body 2 are sleeved with each other;
wherein, at least the silencing body 3 is connected with the outer body 1 and the inner body 2 in a 3D printing and forming mode.
It should be noted that fig. 1 to 4 show specific arrangements of the outer pipe 1, the inner pipe 2 and the silencer 3 according to the present invention, wherein fig. 1 to 4 respectively show different technical solutions.
Fig. 5 to 7 show printing models of the inner pipe body, the silencer body and the outer pipe body, which are proposed by the present invention, and fig. 5 to 7 are not labeled, but show a printing model, and in practical applications, the printing models of fig. 5 to 7 can be combined with the embodiment provided in fig. 1 to 4.
In some embodiments, the sound attenuating bodies 3 are distributed in a grid pattern between the outer pipe body 1 and the inner pipe body 2.
Particularly, latticed amortization body 3 can be effectual carries out turbulent flow, pressure relief to the high-pressure gas that firearms shooting produced, and latticed amortization body 3 connects the outer wall of interior body 2 and the inner wall of outer body 1 respectively, and the high-pressure gas that will transmit into interior body 2 disperses and transmits to outer body 1 department, avoids the high-pressure gas to propagate the impact that the noise that brings is big and lead to the suppressor vibration fast.
In some embodiments, the sound-damping body 3 is any one or a combination of tetrahedrons, hexahedrons, honeycombs, and unit cell points.
Particularly, the latticed silencer 3 can be optimized according to the sizes of different suppressors, different types of silencers 3 can be selected, and lattice strengthening treatment is carried out on stress concentration points, so that the overall performance of the suppressors is improved.
In some embodiments, the outer tube 1 has a plurality of first through holes 101 uniformly distributed thereon, and the first through holes 101 communicate the inner space and the outer space of the outer tube 1; a plurality of second through holes 201 are uniformly distributed on the inner pipe body 2, and the second through holes 201 are communicated with the inner space and the outer space of the inner pipe body 2.
Particularly, through setting up first through-hole 101 and second through-hole 201 for the high-pressure gas that the firearms sent can obtain timely derivation, realizes the amortization and the damping to the firearms.
In some embodiments, the first through-hole 101 and/or the second through-hole 201 are arranged obliquely from the shooting direction of the firearm round toward the shooting direction.
Specifically, the first through hole 101 and the second through hole 201 are improved in orientation, so that the flow of high-pressure gas in the suppressor is guided, the recoil of the firearm is reduced, and the shooting precision is improved.
It should be noted that, just based on the 3D printing technology to machine and mold the suppressor, the manufacturing process of the inclined first through hole 101 and the inclined second through hole 201 is more convenient, and can be realized without a complicated tooling fixture.
In some embodiments, the first through holes 101 and the second through holes 201 are arranged in a one-to-one correspondence.
Particularly, the first through holes 101 and the second through holes 201 are arranged in one-to-one correspondence, so that the dredging effect on high-pressure gas of the firearm can be effectively improved.
In an application scenario, the first through hole 101 and the second through hole 201 are only in one-to-one correspondence with radial positions of the outer pipe body 1 and the inner pipe body 2, that is, high-pressure gas in the inner space of the inner pipe body 2 conducted through the second through hole 201 to the outer space can be finally acted on the inner walls of the silencer 3 and the outer pipe body 1, so that layered discharge of the gunshot can be realized, and the problem of poor silencing effect caused by the fact that the high-pressure gas is simultaneously discharged to the outside of the outer pipe body 1 is avoided.
In an application scenario, the inclination directions of the first through hole 101 and the second through hole 201 are the same, and the axes of the first through hole 101 and the second through hole 201 in the inclination directions are collinear, so that high-pressure gas in the inner pipe body 2 led out by the second through hole 201 is quickly transmitted to the outside of the outer pipe body 1 of the suppressor through the first through hole 101, and the problem that the shooting precision of the firearm is influenced by the shaking of the firearm due to the fact that the suppressor shakes when the high-pressure gas impacts the inner wall of the outer pipe body 1 is avoided.
In an application scenario, the outer pipe body 1 and the inner pipe body 2 are in sliding connection or threaded connection, that is, an adjusting mechanism is arranged between the outer pipe body 1 and the inner pipe body 2, so that sliding or rotation between the outer pipe body 1 and the inner pipe body 2 can be realized, the relative position between the first through hole 101 and the second through hole 201 can be adjusted according to actual requirements, and requirements for preferentially meeting noise reduction or vibration reduction are provided.
Further, the adjusting mechanism can be a slide rail and slider structure arranged on the inner wall of the outer tube body 1 and the outer wall of the inner tube body 2, and a buckle and a clamping hole for positioning the relative position between the outer tube body 1 and the inner tube body 2; in addition, the adjusting mechanism is also integrally formed with the suppressor through a 3D printing rapid forming technology, namely the sliding rail, the sliding block, the buckle and the clamping hole are all formed through 3D printing.
Further, the adjusting mechanism can be a section of thread arranged on the inner wall of the outer pipe body 1 and one end of the outer part of the inner pipe body 2, and the rotation between the outer pipe body 1 and the inner pipe body 2 is realized through the thread, so that the position adjustment between the inner pipe body 2 and the outer pipe body 1 is finally realized. Furthermore, positioning elements, for example positioning pins, are provided which prevent a displacement between the inner tube 2 and the outer tube 1 when no adjustment is required. The adjusting mechanism is also integrally formed with the suppressor through a 3D printing rapid forming technology, namely, the threads at one end of the outer wall of the inner pipe body 2, the threads and the positioning pins at one end of the inner wall of the outer pipe body 1 are formed through 3D printing, and the adjusting mechanism can also be formed through post-processing.
It should be noted that, when the displacement adjustment is realized by sliding or rotating the inner pipe body 2 and the outer pipe body 1, the silencing body 3 between the outer pipe body 1 and the inner pipe body 2 only occupies a part of the position, and abuts against the outer pipe body 1 and/or the inner pipe body 2, and the transmission function is realized only by contact, but not fixed connection. A part for connecting the inner pipe body 2 and the outer pipe body 1 is arranged between the inner pipe body 2 and the outer pipe body 1, so that the inner pipe body 2 and the outer pipe body 1 are prevented from being separated.
In some embodiments, the aperture of the first via 101 is larger than the aperture of the second via 201.
Specifically, the aperture of the first through hole 101 is larger than that of the second through hole 201, so that high-pressure gas can be ensured to flow out of the suppressor quickly, and the silencing effect is realized.
In some embodiments, the outer tube 1, the inner tube 2 and the sound-damping body 3 are mainly made of a titanium alloy.
Particularly, titanium alloy powder is used as a raw material, and a 3D printing forming technology is combined, so that the performance of the suppressor can be improved, and the production period can be shortened; meanwhile, the method can realize automatic production, reduce production cost, and obtain products with high quality and low price.
In some embodiments, the 3D printing is patterned by selective laser sintering.
In particular, due to the nature of the suppressor itself and the characteristics of the material, the 3D printing forming technique of selective laser sintering is the best choice among the rapid forming techniques for processing firearms using the suppressor.
In some embodiments of the present invention, the present solution provides a method for manufacturing the firearm suppressor described above, comprising the steps of:
calling a three-dimensional model of the suppressor and carrying out slicing treatment;
converting a three-dimensional model of the slicer into two-dimensional layered cross section information, and obtaining a motion track which is scanned layer by layer along the height direction;
printing the suppressor on the substrate according to the motion track;
after printing is finished, placing the substrate and the suppressor in hot isostatic pressing equipment for improving strength and density;
carrying out stress relief heat treatment on the substrate and the suppressor;
taking down the suppressor by linear cutting;
and (3) carrying out sand blasting treatment on the suppressor through steel balls and ceramic powder, and tapping at the port of the suppressor after the sand blasting is finished.
In some embodiments of the invention, the process sequence of the invention is as follows: structural design, simulation, topology optimization, 3D printing process design, 3D printing process simulation, 3D printing and printing post-processing.
Firstly, redesigning the structure of the suppressor, wherein the structure is designed into a structure that an outer pipe body 1 and an inner pipe body 2 sandwich a silencer 3, and the silencer 3 adopts a net-shaped porous structure;
then, carrying out simulation on the shooting, and considering the degree of the shooting meeting the use;
then carrying out topology optimization on the whole, particularly carrying out multiple times of simulation and optimization on the size and the structure of the silencer 3, and reducing the length of the suppressor to the shortest according to the optimized silencer 3 structure;
aiming at the characteristics of a product, designing a 3D printing process route and parameters and simulating a printing effect in advance, so that factors influencing the smooth printing are optimized and eliminated;
and then, after the automatic 3D printing and the printing are finished, taking out the part, carrying out heat treatment stress removal, hot isostatic pressing strengthening, linear cutting, taking down the workpiece, and carrying out post-treatment such as sand blasting deburring, surface treatment, machining and the like.
By this time, suppressor production is complete.
The firearm suppressor according to the present invention is mainly composed of an inner tube 2, an outer tube 1, and a silencer 3.
The inner tube 2 is designed as a solid metal cylinder wall with a certain thickness, and second through holes 201 are uniformly distributed on the wall for introducing gas into the silencer 3.
The silencer 3 is designed as a grid stack structure for further dispersing the gas discharged from the inner wall.
The outer tube body 1 is designed as a solid metal tube wall of a certain thickness, on which first through holes 101 are evenly distributed for gas drainage.
The inner pipe body 2, the silencing body 3 and the outer pipe body 1 simultaneously ensure the strength and the performance of the suppressor.
Simulation process:
based on gas dynamics and thermodynamics, the designed structure is subjected to simulation, and the gas flow condition and the heat transfer condition are calculated. According to the type of the suppressor, the wall thickness of the inner pipe body 2, the size number of the second through holes 201 of the inner pipe body 2, the grating size of the silencer 3, the grating size change condition, the wall thickness of the outer pipe body 1 and the size number of the air holes of the outer pipe body 1 are determined.
And (3) topology optimization process:
topology optimization is carried out on the shape of the grid (such as tetrahedron, hexahedron, honeycomb, unit cell lattice and the like), the stacking mode and the size change of the grid (uniform size and edge size distribution), and lattice strengthening treatment is carried out on stress concentration points, so that the overall performance of the suppressor is improved. After the optimal configuration of the attenuating body 3 is achieved, the minimum suppressor length is determined, thereby ensuring that the length of muzzle addition is minimized during use.
Designing 3D printing technological parameters:
according to the characteristics of the suppressor, corresponding processing parameters are designed for the inner pipe body 2, the second through hole 201 on the inner pipe body 2, the lattice grid silencing body 3, the outer pipe body 1 and the first through hole 101 on the outer pipe body 1, a whole set of process parameters of the outer contour, the outer surface, the entity and the inner surface are respectively compiled, a scanning path and a printing mode (a strip type, a chessboard type and the like) are designed, and interlayer scanning rotation is designed to be 50-70 degrees; special technological parameters are set for the joints of the grids and the inner and outer walls and the bending nodes to prevent collapse during printing. When the structure contour is printed, the structure contour is set to be scanned twice, the precision, the internal structure and the performance of the structure are ensured, and the integral density is more than 99.5 percent.
3D printing process simulation:
simulating the printing process, selecting an optimal placing mode and an optimal arrangement mode, and establishing a support with reasonable type, strength and density; particularly, the method focuses on the parts such as heat concentration, collapse generating points, bending or warping, sharp corners, edges and the like, sets special parameters and eliminates factors causing printing failure.
3D printing:
before printing, the equipment is cleaned and adjusted. Cleaning the filtration circulation system by using a pressure vibration cleaning function; after the dust-free paper is dipped in alcohol, circularly wiping the laser lens clockwise; using a rubber scraper, the moving speed of the scraper is set to be 0.5 time for the front 10 layers; then, carrying out preheating treatment on the substrate, and selecting a preheating temperature according to the product type and the titanium alloy; and setting the powder spreading amount and the scanning times of each layer according to the product placing mode and the structural characteristics. The process parameters can be properly adjusted according to the printing effect during printing.
Product post-treatment:
firstly, hot isostatic pressing treatment is carried out on the printed product, so that the performance is enhanced; then, carrying out heat treatment to remove residual stress; and separating the workpiece from the substrate after wire cutting. And then carrying out different post-treatments according to the use working condition, the use environment, the user and the type of the executed task. For example: sand blasting stress removal, surface micro-arc oxidation treatment, surface polishing, carburization, nitriding treatment and the like.
In one application scenario, the suppressor is designed and manufactured in a small size for use in a small gun such as a pistol. The length of the suppressor is small, and the size of the silencer body 3 is large, so that the suppressor is suitable for small-sized silencers.
The method is characterized in that TC4 titanium alloy spherical powder is used as a raw material, the particle size is 15-53 um and is in normal distribution, the particle size distribution D50 is less than or equal to 35um, the fluidity is less than or equal to 40s, and the density is 4.41g/cm 3. The powder comprises the following components in percentage by mass: 89.47% for Ti, 6.13% for Al, 4.19% for V, 0.13% for O, 0.005% for N, 0.014% for C, 0.001% for H, 0.034% for Fe, and 0.022% for Si.
The structure is as follows:
inner tube body 2: the length is 68mm, the inner diameter is 3.5mm, the wall thickness is 1mm, and round holes with the diameter of 1.0mm are uniformly distributed on the inner pipe body 2;
the silencer 3: the inner diameter is 5.5mm, the outer diameter is 8mm, the grids are tetrahedral nets and gradually sparse from the inner wall to the outer wall, and the side length of the tetrahedrons for stacking the grids is changed from 0.3mm at the end of the inner wall to 1.0mm at the end of the outer wall; the branches are cylinders with equal diameter, and the diameter is 0.2 mm;
outer tube 1: the length is 68mm, the outer diameter is 10mm, the wall thickness is 1.0mm, and round holes with the diameter of 2.0mm are uniformly distributed on the outer tube body 1;
3D printing process:
aiming at the characteristics of a plurality of fine grids, holes and thin walls of the part, the process design requirement is very strict.
From the space of putting the form and position, adopt and keep flat and add the mode of support: the part is designed to be flatly placed on the printing substrate, the shaft diameter of the suppressor is parallel to the substrate, and the part with the suspended outer wall at the bottom and the tangential angle smaller than 45 degrees is supported, so that the printing structure is complete.
For the inner tube body 2 thin-walled structure: the entity part adopts a strip scanning strategy; medium power 100 ~ 120W, scanning speed 1100mm/s, scanning interval is 75 ~ 100um, single scanning, and layering thickness 20 um/time. The contour part adopts two times of scanning, the first time has high power of 150W, the scanning speed is 900mm/s, and the scanning interval is 50 um; the power is 100W in the second time, the scanning speed is 900mm/s, and the scanning interval is 50 um.
Aiming at the 3 grid structure of the silencer: the scanning strategy is a chessboard strategy; the method adopts medium power of 100-120W, the scanning speed is 2000mm/s, the scanning interval is 75-100 um, the single scanning is carried out, and the layering thickness is 20 um/time. The profile part adopts one-time scanning, the high power is 150W, the scanning speed is 900mm/s, and the scanning interval is 50 um.
For the outer tube 1 thin-walled structure: the entity part adopts a strip scanning strategy; medium power 100 ~ 120W, scanning speed 1500mm/s, scanning interval is 75 ~ 100um, single scanning, and layering thickness 20 um/time. The contour part adopts two times of scanning, the first time has high power of 150W, the scanning speed is 1000mm/s, and the scanning interval is 75-100 um; the power is 100W in the second time, the scanning speed is 1000mm/s, and the scanning interval is 50 um.
3D printing:
the apparatus was protected with 99.99% pure argon and printing was started at oxygen levels below 500 ppm.
The equipment selects a rubber or carbon fiber soft scraper, the preheating temperature of the substrate is set to be 100 ℃, the heating is stopped after the printing is started, the powder feeding amount of the first 10 layers is 150%, each layer is sintered for 2 times by laser, the 11 th layer is started, and each layer is sintered once by laser until the printing is finished.
And (3) post-treatment:
after printing is finished, firstly, placing the substrate and the part on a hot isostatic pressing device for processing; then placing the substrate and the part in a muffle furnace for stress relief heat treatment; then, cutting off the parts in a linear mode, and carrying out sand blasting on the parts through a steel column; and after the sand blasting is finished, the mixture is machined and tapped at the suppressor port for being connected with the gun barrel.
In an application scene, the long-size suppressor is designed and manufactured in the application scene and is used for large guns such as sniper rifles and the like. This suppressor.
The method is characterized in that TC4 titanium alloy spherical powder is used as a raw material, the particle size is 15-53 um and is in normal distribution, the particle size distribution D50 is less than or equal to 35um, the fluidity is less than or equal to 40s, and the density is 4.41g/cm 3. The powder comprises the following components in percentage by mass: 89.47% for Ti, 6.13% for Al, 4.19% for V, 0.13% for O, 0.005% for N, 0.014% for C, 0.001% for H, 0.034% for Fe, and 0.022% for Si.
The structure is as follows:
inner tube body 2: the length is 110mm, the inner diameter is 5.0mm, the wall thickness is 2mm, and round holes with the diameter of 2.0mm are uniformly distributed on the inner pipe body 2;
the silencer 3: the inner diameter is 9mm, the outer diameter is 36mm, the grids are dodecahedral meshes and gradually sparse from the inner wall to the outer wall, and the side length of the dodecahedral meshes in the grid stacking process is changed from 0.5mm at the end of the inner wall to 1.5mm at the end of the outer wall; the branches are cylinders with equal diameter, and the diameter is 0.3 mm;
outer tube 1: the length is 110mm, the outer diameter is 40mm, the wall thickness is 2.0mm, and round holes with the diameter of 2.5mm are uniformly distributed on the outer tube body 1;
3D printing process:
aiming at the characteristics of a plurality of fine grids, holes and thin walls of the part, the process design requirement is very strict.
From the space of putting the form and position, adopt and keep flat and add the mode of support: the part is designed to be flatly placed on the printing substrate, the shaft diameter of the suppressor is parallel to the substrate, and the part with the suspended outer wall at the bottom and the tangential angle smaller than 45 degrees is supported, so that the printing structure is complete.
For the inner tube body 2 thin-walled structure: the entity part adopts a strip scanning strategy; medium power 100 ~ 120W, scanning speed 1100mm/s, scanning interval is 75 ~ 100um, single scanning, and layering thickness 20 um/time. The contour part adopts two times of scanning, the first time has high power of 150W, the scanning speed is 900mm/s, and the scanning interval is 50 um; the power is 100W in the second time, the scanning speed is 900mm/s, and the scanning interval is 50 um.
Aiming at the 3 grid structure of the silencer: the scanning strategy is a chessboard strategy; the method adopts medium power of 100-120W, the scanning speed is 2000mm/s, the scanning interval is 75-100 um, the single scanning is carried out, and the layering thickness is 20 um/time. The profile part adopts one-time scanning, the high power is 150W, the scanning speed is 900mm/s, and the scanning interval is 50 um.
For the outer tube 1 thin-walled structure: the entity part adopts a strip scanning strategy; medium power 100 ~ 120W, scanning speed 1500mm/s, scanning interval is 75 ~ 100um, single scanning, and layering thickness 20 um/time. The contour part adopts two times of scanning, the first time has high power of 150W, the scanning speed is 1000mm/s, and the scanning interval is 75-100 um; the power is 100W in the second time, the scanning speed is 1000mm/s, and the scanning interval is 50 um.
3D printing:
the apparatus was protected with 99.99% pure argon and printing was started at oxygen levels below 1000 ppm.
The equipment selects a rubber or carbon fiber soft scraper, the preheating temperature of the substrate is set to be 100 ℃, the heating is stopped after the printing is started, the powder feeding amount of the first 10 layers is 150%, each layer is sintered for 2 times by laser, the 11 th layer is started, and each layer is sintered once by laser until the printing is finished.
And (3) post-treatment:
after printing is finished, firstly, placing the substrate and the part on a hot isostatic pressing device for processing; then placing the substrate and the part in a muffle furnace for stress relief heat treatment; then, cutting off the parts in a linear mode, and carrying out sand blasting on the parts through a steel column; and after the sand blasting is finished, the mixture is machined and tapped at the suppressor port for being connected with the gun barrel.
In the description of the embodiments of the present invention, it should be noted that, unless explicitly stated or limited otherwise, the terms "connected" and "connected" are to be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. Specific meanings of the above terms in the embodiments of the present invention can be understood in specific cases by those of ordinary skill in the art.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of an embodiment of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
The above embodiments are merely illustrative of the present invention, and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the embodiments, it should be understood by those skilled in the art that various combinations, modifications or equivalents may be made to the technical solution of the present invention without departing from the spirit and scope of the technical solution of the present invention, and the technical solution of the present invention is covered by the claims of the present invention.
Claims (10)
1. A firearm suppressor, comprising:
the silencer comprises an outer pipe body, an inner pipe body and a silencer body, wherein the outer pipe body and the inner pipe body are sleeved with each other;
wherein, at least the amortization body is connected with outer body, interior body through 3D printing shaping mode.
2. The firearm suppressor according to claim 1, wherein said noise reducing body is disposed in a grid pattern between said outer tube and said inner tube.
3. The firearm suppressor according to claim 2, wherein said sound suppressor is any one or a combination of tetrahedrons, hexahedrons, honeycombs and cell sites.
4. The firearm suppressor of claim 1,
a plurality of first through holes are uniformly distributed on the outer tube body, and the first through holes are communicated with the inner space and the outer space of the outer tube body;
a plurality of second through holes are uniformly distributed in the inner pipe body, and the second through holes are communicated with the inner space and the outer space of the inner pipe body.
5. A firearm suppressor according to claim 4, wherein said first through-hole and/or said second through-hole are provided obliquely with respect to the direction of ejection from the direction of injection of the firearm round.
6. The firearm suppressor according to claim 4, wherein said first through-holes and said second through-holes are arranged in a one-to-one correspondence.
7. The firearm suppressor according to claim 4, wherein an aperture of said first through-hole is larger than an aperture of said second through-hole.
8. The firearm suppressor according to any of claims 1 to 7, characterized in that said outer tube, said inner tube and said sound attenuating body are made mainly of titanium alloy.
9. The firearm suppressor according to claim 8, wherein said 3D printing is performed by selective laser sintering.
10. A method of making a firearm suppressor according to any of the preceding claims 1 to 9, characterized in that it comprises the steps of:
calling a three-dimensional model of the suppressor and carrying out slicing treatment;
converting the three-dimensional model of the suppressor subjected to slicing processing into two-dimensional layered cross section information, and obtaining a motion track scanned layer by layer along the height direction;
printing the suppressor on the substrate according to the motion track;
after printing is finished, the substrate and the suppressor are placed in a hot isostatic pressing device for intensity improvement and density increase treatment;
performing stress relief heat treatment on the substrate together with the suppressor;
removing the suppressor by wire cutting;
and carrying out sand blasting treatment on the suppressor through steel balls and ceramic powder, and tapping at a port of the suppressor after the sand blasting is finished.
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Application publication date: 20201225 |