CN108356509A - Automatic nail beating device and its nailing method - Google Patents
Automatic nail beating device and its nailing method Download PDFInfo
- Publication number
- CN108356509A CN108356509A CN201810348536.0A CN201810348536A CN108356509A CN 108356509 A CN108356509 A CN 108356509A CN 201810348536 A CN201810348536 A CN 201810348536A CN 108356509 A CN108356509 A CN 108356509A
- Authority
- CN
- China
- Prior art keywords
- nailing
- spanner
- screwdriver bit
- extension rod
- elevating mechanism
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P19/00—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes
- B23P19/04—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes for assembling or disassembling parts
- B23P19/06—Screw or nut setting or loosening machines
- B23P19/069—Multi-spindle machines
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Dovetailed Work, And Nailing Machines And Stapling Machines For Wood (AREA)
Abstract
A kind of automatic nail beating device and its nailing method, the device include fixed frame, the nailing spanner supporting rack set on fixed frame top, nailing spanner, driving nailing spanner supporting rack move back and forth above and below elevating mechanism, set on fixed frame bottom wait twist nail product delivery track, it is characterised in that：The quantity of nailing spanner is multiple, the lower end of each nailing spanner is fixed with screwdriver bit sleeve, the cavity of bottom opening is equipped in screwdriver bit sleeve, and extension rod is inserted by bottom opening, extension rod upper end is equipped with positioning pin, the position that the cavity sidewalls of screwdriver bit sleeve correspond to positioning pin both ends offers longitudinal slot hole, compressed spring is equipped between extension rod top surface and the cavity floor of screwdriver bit sleeve, extension rod bottom is fixed with screwdriver bit.Its is reasonable in design, using reliable, fundamentally solves existing screw fastening device and is easy to screw not in place, causes to fasten hypodynamic problem, and can realize multiple screws while tighten, be uniformly controlled, production efficiency is high.
Description
Technical field
The present invention relates to screw tightening technology, especially a kind of automatic nail beating device and its nailing method.
Background technology
Existing nailing device is to screw tight screw using nailing spanner, according to spanner built-in chip preset torque value,
Screw direction.In actual use, before nailing, by manual operation by the fixed screwdriver bit in the lower part of nailing spanner
With the top surface groove of screw to be twisted to just, to carrying out nailing again after just, working efficiency is influenced on positive process, it is more in particular for beating
When a nail, to carry out first nail to just, nailing, second nail to just, nailing ....Labor intensity of operating staff is high, production efficiency
It is low.
Invention content
The purpose of the invention is to provide, a kind of automated procedures are high, can greatly improve the automatic nailing of production efficiency dress
It sets and its nailing method.
The technical scheme is that：
A kind of automatic nail beating device, including fixed frame, the nailing spanner supporting rack set on fixed frame top, nailing spanner,
Elevating mechanism that driving nailing spanner supporting rack pumps set on fixed frame bottom waits for nailing product delivery track,
It is characterized in that：The quantity of the nailing spanner is one or more, and the lower end of each nailing spanner is fixed with screwdriver bit sleeve, institute
The cavity for being equipped with bottom opening in screwdriver bit sleeve is stated, and extension rod, the extension rod upper end setting positioning are inserted by bottom opening
Pin, the position that the cavity sidewalls of the screwdriver bit sleeve correspond to positioning pin both ends offer longitudinal slot hole, the extension rod top surface and
Compressed spring is equipped between the cavity floor of screwdriver bit sleeve, the extension rod bottom is fixed with screwdriver bit.
Above-mentioned automatic nail beating device is additionally provided with the collection for the control chip for having gathered each nailing spanner on the fixed frame
Middle mounting box, the control interconnecting device and PLC that each control chip installed concentratedly in box passes through each nailing spanner of correspondence
Programmable controller is connected, and the signal input part of the PLC programmable controller is separately connected with detection and waits for whether nailing product arrives
The sensor I of position, the sensor II for detecting elevating mechanism stroke, the signal output end of the PLC programmable controller and lifting
Mechanism connects, and is connected with alarm.
Above-mentioned automatic nail beating device, the fixed frame by upper mounted plate, bottom plate, be connected to upper bottom plate quadrangle
Between position guiding axis composition, the nailing spanner supporting rack by upper backup pad, lower supporting plate, be connected to upper and lower support plate it
Between multiple support columns, be respectively arranged on upper backup pad and lower supporting plate corner location linear bearing, be set to lower supporting plate bottom surface
Slideway, can be slided along slideway and utilize spring thimble position nailing spanner fixed plate composition, the upper and lower support plate quadrangle
Correspondence is set on four guiding axis of fixed frame the linear bearing of position respectively, and the upper and lower support plate is respectively U-shaped, institute
Nailing spanner fixed plate is stated along the U-shaped inner region that slideway slides into lower supporting plate.
Above-mentioned automatic nail beating device, the elevating mechanism is using two liters being arranged symmetrically being inverted on upper mounted plate
The cylinder rod of sending down abnormally ascending cylinder, the lifting cylinder is connected and fixed across upper mounted plate with upper backup pad.
Above-mentioned automatic nail beating device, the end face center of the screwdriver bit sleeve is equipped with to be coordinated with nailing spanner lower end centre bore
Outer six sides gag lever post, it is concentric with outer six sides gag lever post and with nailing spanner lower end periphery face cooperation open spacing ring, with
It realizes double limit, overcomes the destabilizing factor brought due to increasing extension rod.
Above-mentioned automatic nail beating device, the extension rod upper end be equipped with corresponding positioning pin through-hole and it is vertical with the through-hole simultaneously
The threaded hole communicated, the interior screw being equipped with for holding out against positioning pin of the threaded hole, scurries out to avoid positioning pin and is detached from extension rod.
Above-mentioned automatic nail beating device, the position that the screwdriver bit sleeve corresponds to the threaded hole of extension rod are installed equipped with screw
Hole, with by the hole by screw-driving on extension rod.
Above-mentioned automatic nail beating device, it is described to wait for that nailing product delivery track is equipped with sliding machine and is set to sliding machine
The lifting body of lower section coordinates so that when product reaches nailing station, lifting body supports sliding machine and twists needle behaviour
Make.
A kind of nailing method of above-mentioned automatic nail beating device, which is characterized in that include the following steps：
1), wait for whether nailing product reaches designated position by the identification of sensor I, after product reaches designated position, PLC
Programmable controller outputs signal to elevating mechanism, drives nailing spanner supporting rack to decline by elevating mechanism；
2), after elevating mechanism drops to lower travel limit position, the feedback letter of PLC programmable controller receiving sensor II
Number and corresponding nailing spanner controlled by the control interconnecting device of each nailing spanner of correspondence inverted, the screwdriver bit
Its top realizes that centering is aligned with the top surface groove of screw to be tightened in Umklapp process, and the top of screwdriver bit is made to fall completely
In the top surface groove for entering screw to be tightened；
3), when inverted between reach setting time for the moment, PLC programmable controller sends out control instruction, makes nailing spanner
Stop reverse simultaneously starts to rotate forward, and during nailing spanner rotates in the forward direction, under compressed spring effect, screwdriver bit occurs simultaneously
Circumferencial direction and length travel, to drive screw secured product to be tightened, when torsion reaches setting value, striker pop-up passes
Sensor obtains signal, after PLC programmable controller receives the signal, sends out all member resets of halt instruction, and product passes through,
Action is tightened in completion.
Above-mentioned nailing method, in step 3), in two internal thread of the setting time after nailing spanner starts to rotate forward
When knife screwdriver bit not up to sets torque, PLC programmable controller output control signal makes all component stoppings act and passes through report
Alert device alarm, operative employee's manual handle defective products simultaneously press the reset button being connect with PLC, and mechanism restores normal.
Above-mentioned nailing method, the setting time one and setting time two are 0.5~1s.
The beneficial effects of the invention are as follows：
1, due to having redesigned the package assembly of unique screwdriver bit sleeve, extension rod and screwdriver bit, coordinate nailing
The method that spanner inverts centering, makes nailing wrench before rotating in the forward direction, the top surface groove of screwdriver bit and screw to be tightened is complete
Full alignment rotates in the forward direction and starts to enter rundown process, will not cause to tighten situation not in place, reasonable in design, use
It is reliable fundamentally to solve existing screw fastening device and be easy to screw not in place, it causes to fasten hypodynamic problem, ensure that stubborn
Tight effect, improves product quality.
2, the control chip of each nailing spanner is installed concentratedly, and each control chip passes through each nailing spanner of correspondence
Control interconnecting device be connected with PLC programmable controller, it can be achieved that multiple screws are tightened simultaneously, be uniformly controlled, significantly improve
Production efficiency.
3, simple in structure, manufacturing cost is low, cost-effective.
Description of the drawings
Fig. 1 is the structural schematic diagram of the present invention；
Fig. 2 is screwdriver bit sleeve, extension rod and the screwdriver bit assembly structure diagram of the present invention；
Fig. 3 is the left view of Fig. 2；
Fig. 4 be in Fig. 3 A-A to sectional view；
Fig. 5 is screwdriver bit sleeve, extension rod and the screwdriver bit assembling structure stereogram of the present invention；
Fig. 6 is the fundamental diagram of the present invention.
In figure：1. control interconnecting device, 2. install box, 3. lifting cylinders, 4. upper mounted plates, 5. upper backup pads, 6. concentratedly directly
Spool holds, 7. support columns, 8. lower supporting plates, 9. guiding axis, 10. screwdriver bit sleeves, 11. extension rods, 12. screwdriver bits, 13. waits for
Nailing product delivery track, 16. nailing spanner fixed plates, 17. slideways, 18. springs are waited in nailing product, 14. sliding machines, 15.
Thimble, 19. nailing spanners, 20. sensors II, 21. compressed springs, 22. positioning pins, 23. screw mounting holes, 24. threaded holes,
25. longitudinal slot hole, 26. outer six side's gag lever posts, 27. open spacing rings, 28. screws, 29. bottom plates.
Specific implementation mode
As shown in figs 1 to 6, the automatic nail beating device, including fixed frame, the nailing spanner set on fixed frame top support
Elevating mechanism that frame, nailing spanner 19, driving nailing spanner supporting rack pump set on fixed frame bottom waits for nailing
Product delivery track 15.The quantity of the nailing spanner 19 is multiple, and the lower end of each nailing spanner 19 is fixed with screwdriver bit sleeve
10, the cavity of bottom opening is equipped in the screwdriver bit sleeve 10, and extension rod 11 is inserted by bottom opening, on the extension rod 11
End is equipped with positioning pin 22, and the position that the cavity sidewalls of the screwdriver bit sleeve 10 correspond to 22 both ends of positioning pin offers longitudinal slot hole
25, compressed spring 21,11 bottom of the extension rod are equipped between 11 top surface of the extension rod and the cavity floor of screwdriver bit sleeve 10
It is fixed with screwdriver bit 12.The end face center of the screwdriver bit sleeve 10 is equipped with outer with the 19 lower end centre bore cooperation of nailing spanner
Six side's gag lever posts 26, it is concentric with outer six sides gag lever post 26 and with 19 lower end periphery face of nailing spanner cooperation open spacing ring
27, to realize double limit, overcome the destabilizing factor brought due to increasing extension rod 11.11 upper end of the extension rod be equipped with pair
The through-hole of positioning pin 22 and threaded hole 24 that is vertical with the through-hole and communicating are answered, is equipped in the threaded hole 24 for holding out against positioning
The screw of pin scurries out to avoid positioning pin 22 and is detached from extension rod 11.The screwdriver bit sleeve 10 corresponds to the threaded hole 24 of extension rod 11
Position be equipped with screw mounting hole 23, screw 28 to be tightened on extension rod 11 by the hole.It is additionally provided on the fixed frame
That has gathered the control chip of each nailing spanner 19 installs box 2 concentratedly, and each control chip installed concentratedly in box 2 is logical
The control interconnecting device 1 for crossing corresponding each nailing spanner 19 is connected with PLC programmable controller (being omitted in Fig. 1), and the PLC can be compiled
The signal input part of range controller be separately connected with detection wait for nailing product 13 whether sensor I in place, detection elevating mechanism row
The sensor II 20 of journey, the sensor I wait for the position, described in place of nailing product 13 using photoelectric sensor and setting corresponding
Sensor II 20 is corresponding to elevating mechanism lower travel limit position using magnetic switch and setting, the PLC programmable controller
Signal output end is connect with elevating mechanism, and connects alarm, this example alarm device uses buzzer.
In the present embodiment, the fixed frame by upper mounted plate 4, bottom plate 29, be connected to 4,29 4 jiaos of upper and lower fixing plate
Guiding axis 9 between position forms, the nailing spanner supporting rack by upper backup pad 5, lower supporting plate 8, be connected to upper and lower support
Multiple support columns 7 between plate 5,8, are set to down the linear bearing 6 for being respectively arranged on 8 corner location of upper backup pad 5 and lower supporting plate
The slideway 17 of 8 bottom surface of support plate can be slided along slideway 17 and be formed using the nailing spanner fixed plate 16 that spring thimble 18 positions,
The upper and lower support plate 5,8 corner locations linear bearing 6 respectively correspondence be set on four guiding axis 9 of fixed frame, it is described
Upper and lower support plate 5,8 is respectively U-shaped, and the nailing spanner fixed plate 16 is along the U-shaped inner region that slideway 17 slides into lower supporting plate 8.
The elevating mechanism is using two lifting cylinders 3 being arranged symmetrically being inverted on upper mounted plate 4, the cylinder of the lifting cylinder 3
Bar is connected and fixed across upper mounted plate 4 with upper backup pad 5.It is described wait for nailing product delivery track 15 be equipped with sliding machine 14 and
Lifting body set on 14 lower section of sliding machine, with when product reaches nailing station, lifting body supports sliding machine 14
Get up, coordinates and twist needle operation.
Nailing method, includes the following steps：
1, wait for whether nailing product 13 reaches designated position by the identification of sensor I, after product reaches designated position,
The feedback signal of PLC programmable controller receiving sensor I simultaneously outputs signal to elevating mechanism, drives nailing to pull by elevating mechanism
Hand supporting rack declines.
2, after elevating mechanism drops to lower travel limit position, the feedback of PLC programmable controller receiving sensor II 20
Signal simultaneously exports " start ", " Rev " signal to the control interconnecting device 1 of each nailing spanner of correspondence, passes through and controls the control of interconnecting device 1
It makes corresponding nailing spanner 19 to be inverted, the top on the screwdriver bit 12 its top and screw to be tightened in Umklapp process
Face groove realizes centering alignment, and the top of screwdriver bit 12 is made to fall completely in the top surface groove of screw to be tightened.
3, when inverted between reach setting time for the moment, the present embodiment 0.5s, PLC programmable controller sends out control and refers to
It enables, makes 19 stop reverse of nailing spanner and export " stop " signal, nailing spanner 19 starts to rotate forward, and nailing spanner 19 rotates in the forward direction
In the process, under the effect of compressed spring 21, simultaneously circumferencial direction and length travel occur for screwdriver bit 12, wait twisting to drive
Tight screw secured product, when torsion reaches setting value, the control interconnecting device 1 of nailing spanner 19 exports " Stop " signal, and PLC can
After programmable controller receives the signal, all member resets of instruction are sent out, product passes through, and action is tightened in completion.It is pulled in nailing
Hand 19 starts after rotating forward when two internal thread knife screwdriver bit 12 of setting time not up to sets torque, this example setting time two is
1s, all component stoppings is made to act for PLC programmable controller output control signal and by buzzer warning, operative employee locates manually
Reason defective products simultaneously presses the reset button being connect with PLC, and mechanism restores normal.
Claims (10)
1. a kind of automatic nail beating device, including fixed frame, the nailing spanner supporting rack set on fixed frame top, nailing spanner, drive
Elevating mechanism that dynamic nailing spanner supporting rack moves back and forth above and below waits twisting nail product delivery track set on fixed frame bottom,
It is characterized in that：The quantity of the nailing spanner is multiple, and the lower end of each nailing spanner is fixed with screwdriver bit sleeve, the screwdriver bit set
It is equipped with the cavity of bottom opening in cylinder, and extension rod is inserted by bottom opening, the extension rod upper end is equipped with positioning pin, described
The position that the cavity sidewalls of screwdriver bit sleeve correspond to positioning pin both ends offers longitudinal slot hole, the extension rod top surface and screwdriver bit sleeve
Cavity floor between be equipped with compressed spring, the extension rod bottom is fixed with screwdriver bit, it is characterised in that：The fixation
The box of installing concentratedly for the control chip for having gathered each nailing spanner, each control installed concentratedly in box are additionally provided on frame
Chip is connected by the control interconnecting device of each nailing spanner of correspondence with PLC programmable controller, the PLC programmable controller
Signal input part be separately connected with detect wait twisting nail product whether sensor I in place, detect the sensor of elevating mechanism stroke
II, the signal output end of the PLC programmable controller is connect with elevating mechanism, and is connected with alarm.
2. automatic nail beating device according to claim 1, it is characterised in that：The fixed frame is by upper mounted plate, lower fixation
Plate, the guiding axis being connected between upper and lower fixing plate corner location composition, the nailing spanner supporting rack by upper backup pad, under
Support plate, is respectively arranged on upper backup pad and lower supporting plate corner location at the multiple support columns being connected between upper and lower support plate
Linear bearing, set on lower supporting plate bottom surface slideway, can along slideway slide and using spring thimble position nailing spanner fix
Board group is at correspondence is set on four guiding axis of fixed frame the linear bearing of the upper and lower support plate corner location respectively, institute
It is respectively U-shaped to state upper and lower support plate, and the nailing spanner fixed plate is along the U-shaped inner region that slideway slides into lower supporting plate.
3. automatic nail beating device according to claim 3, it is characterised in that：Fixed plate is equipped with elevating mechanism,
The elevating mechanism is two lifting cylinders being arranged symmetrically being inverted on upper mounted plate, and the cylinder rod of the lifting cylinder passes through
Upper mounted plate is connected and fixed with upper backup pad.
4. automatic nail beating device according to claim 1, it is characterised in that：The end face center of the screwdriver bit sleeve be equipped with
The outer six sides gag lever post of nailing spanner lower end centre bore cooperation, it is concentric with outer six sides gag lever post and with nailing spanner lower end periphery face
The open spacing ring of cooperation.
5. automatic nail beating device according to claim 1, it is characterised in that：The extension rod upper end is equipped with corresponding positioning pin
Through-hole and threaded hole that is vertical with the through-hole and communicating, the screw for holding out against positioning pin is equipped in the threaded hole.
6. automatic nail beating device according to claim 6, it is characterised in that：The screwdriver bit sleeve corresponds to the screw thread of extension rod
The position in hole is equipped with screw mounting hole.
7. automatic nail beating device according to claim 1, it is characterised in that：It is described to wait that twisting nail product delivery track is equipped with
Sliding machine and the lifting body below sliding machine.
8. a kind of stubborn nail method using automatic nail beating device as described in claim 1, which is characterized in that including walking as follows
Suddenly：1) it, is identified by sensor I and waits twisting whether nail product reaches designated position, after product reaches designated position, PLC can be compiled
Range controller outputs signal to elevating mechanism, drives nailing spanner supporting rack to decline by elevating mechanism；
2), after elevating mechanism descending stroke to limit, the feedback signal of PLC programmable controller receiving sensor II and by right
It answers the control interconnecting device of each nailing spanner to control corresponding nailing spanner to be inverted, the screwdriver bit is in Umklapp process
In the top surface groove of its top and screw to be tightened realize that centering is aligned, so that the top of screwdriver bit is fallen completely within spiral shell to be tightened
In the top surface groove of nail；
3), when inverted between reach setting time for the moment, PLC programmable controller sends out control instruction, and nailing spanner is made to stop
It inverts and starts to rotate forward, during nailing spanner rotates in the forward direction, under compressed spring effect, simultaneously circumferential direction occurs for screwdriver bit
And length travel, to drive screw secured product to be tightened, when torsion reaches setting value, the control interconnecting device of nailing spanner
Stop signal is exported, after PLC programmable controller receives the signal, sends out all member resets of instruction, product passes through, and completes
Tighten action.
9. the nailing method of automatic stubborn spike devices according to claim 8, it is characterised in that：In step 3), work as nailing
After spanner rotating forward when two internal thread knife screwdriver bit of setting time not up to sets torque, PLC programmable controller output control is believed
So that all component stoppings is acted and by alarm equipment alarm, operative employee's manual handle defective products simultaneously presses the machine being connect with PLC
Structure reset button, mechanism restore normal.
10. the nailing method of automatic nail beating device according to claim 9, it is characterised in that：One He of the setting time
Setting time two is 0.5~1s.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810348536.0A CN108356509B (en) | 2018-04-18 | 2018-04-18 | Automatic nailing device and nailing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810348536.0A CN108356509B (en) | 2018-04-18 | 2018-04-18 | Automatic nailing device and nailing method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108356509A true CN108356509A (en) | 2018-08-03 |
| CN108356509B CN108356509B (en) | 2023-08-08 |
Family
ID=63008647
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810348536.0A Active CN108356509B (en) | 2018-04-18 | 2018-04-18 | Automatic nailing device and nailing method thereof |
Country Status (1)
| Country | Link |
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| CN (1) | CN108356509B (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108857370A (en) * | 2018-09-10 | 2018-11-23 | 苏州华维乐自动化科技有限公司 | A kind of simple platform machine four-head synchronization the screwed lock equipment |
| CN109093372A (en) * | 2018-11-02 | 2018-12-28 | 珠海格力智能装备有限公司 | Assembling equipment |
| CN109531119A (en) * | 2018-11-30 | 2019-03-29 | 中国地质大学（武汉） | A kind of tooling device and method adjusting Microwave Cavity Filter bolt |
| CN109570987A (en) * | 2018-12-27 | 2019-04-05 | Tcl王牌电器(惠州)有限公司 | Take lock screw device and Full-automatic screw locking machine |
| CN110000554A (en) * | 2019-05-15 | 2019-07-12 | 长春合心机械制造有限公司 | It is automatic to twist nail equipment |
| CN111660277A (en) * | 2020-06-28 | 2020-09-15 | 中铁九局集团电务工程有限公司 | Bolt mounting arm |
| CN112935782A (en) * | 2021-03-22 | 2021-06-11 | 南京航空航天大学 | Actuator, assembly system and method for assembling T/R assembly of array antenna |
| CN114571220A (en) * | 2020-12-01 | 2022-06-03 | 福建星网元智科技有限公司 | Screw locking machine |
| CN114986139A (en) * | 2022-06-01 | 2022-09-02 | 北京航天控制仪器研究所 | Precise synchronous automatic tightening device and method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108857370A (en) * | 2018-09-10 | 2018-11-23 | 苏州华维乐自动化科技有限公司 | A kind of simple platform machine four-head synchronization the screwed lock equipment |
| CN109093372A (en) * | 2018-11-02 | 2018-12-28 | 珠海格力智能装备有限公司 | Assembling equipment |
| CN109531119A (en) * | 2018-11-30 | 2019-03-29 | 中国地质大学（武汉） | A kind of tooling device and method adjusting Microwave Cavity Filter bolt |
| CN109570987A (en) * | 2018-12-27 | 2019-04-05 | Tcl王牌电器(惠州)有限公司 | Take lock screw device and Full-automatic screw locking machine |
| CN110000554A (en) * | 2019-05-15 | 2019-07-12 | 长春合心机械制造有限公司 | It is automatic to twist nail equipment |
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| CN111660277A (en) * | 2020-06-28 | 2020-09-15 | 中铁九局集团电务工程有限公司 | Bolt mounting arm |
| CN111660277B (en) * | 2020-06-28 | 2023-02-10 | 中铁九局集团电务工程有限公司 | Bolt mounting arm |
| CN114571220A (en) * | 2020-12-01 | 2022-06-03 | 福建星网元智科技有限公司 | Screw locking machine |
| CN112935782A (en) * | 2021-03-22 | 2021-06-11 | 南京航空航天大学 | Actuator, assembly system and method for assembling T/R assembly of array antenna |
| CN114986139A (en) * | 2022-06-01 | 2022-09-02 | 北京航天控制仪器研究所 | Precise synchronous automatic tightening device and method |
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|---|---|
| CN108356509B (en) | 2023-08-08 |
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