CN107270786B - Primer tightening machine and use method thereof - Google Patents
Primer tightening machine and use method thereof Download PDFInfo
- Publication number
- CN107270786B CN107270786B CN201710510606.3A CN201710510606A CN107270786B CN 107270786 B CN107270786 B CN 107270786B CN 201710510606 A CN201710510606 A CN 201710510606A CN 107270786 B CN107270786 B CN 107270786B
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- China
- Prior art keywords
- primer
- frame
- clamping
- fixing device
- driving device
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- 238000000034 method Methods 0.000 title claims description 14
- 238000001514 detection method Methods 0.000 claims abstract description 24
- 239000003638 chemical reducing agent Substances 0.000 claims description 10
- 238000006073 displacement reaction Methods 0.000 claims description 10
- 238000009434 installation Methods 0.000 claims 3
- 239000000843 powder Substances 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 239000002360 explosive Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
- F42B33/00—Manufacture of ammunition; Dismantling of ammunition; Apparatus therefor
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- General Engineering & Computer Science (AREA)
- Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)
- Portable Nailing Machines And Staplers (AREA)
Abstract
A primer tightening machine comprises a clamping machine and a tightening machine; the clamping machine comprises a clamping frame, a lifting mechanism and a clamping device, wherein the clamping frame is positioned on one side of the assembly detection conveying line, the lifting mechanism is fixedly arranged on the clamping frame and positioned above the assembly detection conveying line, and the clamping device is fixedly connected with the lifting mechanism; the screwing machine comprises a screwing rack, a frame, a longitudinal translation driving device, a guide rail, a sliding block, a mounting frame, a screwing driving device and a primer fixing device; the bottom of frame and screw up frame fixed connection, the fixed setting of guide rail is on the frame upper surface, and the slider sets up on the guide rail, and vertical translation drive arrangement sets up on the frame and drives slider reciprocating motion on the guide rail, and mounting bracket lower surface and slider upper surface fixed connection screw up drive arrangement fixed setting is at the mounting bracket upper surface, screw up drive arrangement's output shaft and primer fixing device and be connected, and the primer fixing device of tight drive arrangement drive is at mounting bracket upper surface reciprocating motion.
Description
Technical Field
The invention relates to the field of powder and explosive charging, in particular to a primer tightening machine and a using method thereof.
Background
During the process of loading the powder or explosive, the primer is screwed into the powder-filled product. In the prior art, the primer is screwed up by manpower, so that the labor intensity is high, the working efficiency is low, the primer screwing quality is low, and the full-automatic operation of the charging process is difficult to realize.
Disclosure of Invention
The technical solution of the invention is as follows: overcomes the defects of the prior art and provides a primer tightening machine and a use method thereof.
The technical scheme of the invention is as follows: a primer tightening machine comprises a clamping machine and a tightening machine; the clamping machine comprises a clamping frame, a lifting mechanism and a clamping device, wherein the clamping frame is positioned on one side of an assembly detection conveying line, the lifting mechanism is fixedly arranged on the clamping frame and positioned above the assembly detection conveying line, and the clamping device is fixedly connected with the lifting mechanism; the tightening machine comprises a tightening frame, a longitudinal translation mechanism frame, a longitudinal translation driving device, a guide rail, a sliding block, a mounting frame, a tightening driving device and a primer fixing device; the bottom of vertical translation mechanism frame is in with screw up frame fixed connection, the guide rail is fixed to be set up vertical translation mechanism frame upper surface, the slider sets up on the guide rail, vertical translation drive arrangement sets up on the vertical translation mechanism frame and drive the slider is in reciprocating motion on the guide rail, the mounting bracket lower surface with slider upper surface fixed connection, screw up drive arrangement fixed setting is in the mounting bracket upper surface, screw up drive arrangement's output shaft with primer fixing device connects, it drives to screw up drive arrangement primer fixing device is in mounting bracket upper surface reciprocating motion.
Further, the longitudinal translation driving device is a stepping motor, an output shaft of the longitudinal translation driving device is connected with a screw rod, a nut is fixedly arranged on the lower surface of the sliding block, and the nut is arranged on the screw rod.
Further, the primer tightening machine comprises a displacement sensor for detecting the horizontal movement position of the primer fixing device, wherein the displacement sensor comprises a travel switch touch plate and a travel switch assembly, the travel switch touch plate is arranged on the mounting frame, and the travel switch assembly is arranged on the longitudinal translation mechanism frame.
Further, the tightening driving device comprises a stepping motor and a speed reducer which are sequentially connected, and an output shaft of the speed reducer penetrates through the mounting frame and is connected with the primer fixing device.
Further, the primer tightening machine comprises a torque sensor for detecting the torque of the primer fixing device, and the torque sensor is sleeved on an output shaft of the speed reducer.
Further, the primer tightening machine comprises a depth detection sensor for detecting the depth of the primer fixing device entering the product, and the depth detection sensor is arranged on the primer fixing device.
Further, the lifting mechanism is a hydraulic cylinder or an air cylinder.
The method for screwing the primer by using the primer screwing machine comprises the following steps of:
a) The lifting mechanism drives the clamping device to descend to a preset position, and after the clamping device clamps a product, the lifting mechanism drives the clamping device to ascend until the axis of the product is coaxial with the axis of the primer fixing device;
b) The longitudinal translation driving device drives the sliding block to move to a preset position on the guide rail along the horizontal direction towards the product, and then the longitudinal translation driving device stops working;
c) The screwing driving device is started to drive the primer fixing device to move towards the product along the horizontal direction on the mounting frame, in the moving process, after the primer fixing device selects primer into a screw hole of the product to a preset position, the screwing driving device is started to drive the primer fixing device to move to an initial position on the mounting frame along the horizontal direction back to the product, and the longitudinal translation driving device drives the sliding block to move to the initial position along the horizontal direction back to the product on the guide rail, so that the longitudinal translation driving device stops working;
d) And the lifting mechanism drives the clamping device to descend to a preset position, the clamping device loosens the product, and after the product falls into the assembly detection conveying line, the lifting mechanism drives the clamping device to ascend to an initial position.
Further, the device comprises a displacement sensor for detecting the horizontal movement position of the primer fixing device, the displacement sensor comprises a travel switch touch plate and a travel switch assembly, the travel switch touch plate is arranged on the mounting frame, the travel switch assembly is arranged on the longitudinal translation mechanism frame, the longitudinal translation driving device drives the sliding block to face the product along the horizontal direction on the guide rail, and after the travel switch touch plate is contacted with the travel switch assembly, the longitudinal translation driving device stops working.
Further, including the torque sensor that is used for detecting primer fixing device moment of torsion and the degree of depth detection sensor that is used for detecting primer fixing device and gets into the product degree of depth, torque sensor cup joints on the output shaft of reduction gear, degree of depth detection sensor sets up on the primer fixing device, screw up drive arrangement and start, drive primer fixing device along the horizontal direction on the mounting bracket towards the product removal, in-process of movement, primer fixing device is selected into the screw of product with primer, torque sensor and degree of depth detection sensor reach the preset position after, screw up drive arrangement start, drive primer fixing device on the mounting bracket along the horizontal direction dorsad product removal to initial position.
Compared with the prior art, the invention has the advantages that:
by adopting the scheme, automatic primer screwing can be completely realized, the defects of high labor intensity, low working efficiency and the like caused by manual primer screwing in the prior art are fundamentally overcome, the primer screwing quality is high, meanwhile, the primer screwing machine disclosed by the invention is compact in structure, reasonable in layout, accurate and rapid in automatic primer screwing, wide in application range, convenient to install and low in investment, does not occupy more production space, and can provide guarantee for full-automatic operation of a charging production line.
Drawings
Fig. 1 is a front view of the primer screw-down machine of the present invention.
Detailed Description
As shown in fig. 1, the primer tightening machine is characterized by comprising a clamping machine, a tightening machine and a control system; the clamping machine comprises a clamping frame 1, a lifting mechanism 2 and a clamping device 3, wherein the clamping frame 1 is positioned on one side of an assembly detection conveying line 17, the lifting mechanism 2 is fixedly arranged on the clamping frame 1 and positioned above the assembly detection conveying line 17, and the clamping device 3 is fixedly connected with the lifting mechanism 2; the tightening machine comprises a tightening frame 4, a longitudinal translation mechanism frame 5, a longitudinal translation driving device 6, a guide rail 7, a sliding block 8, a mounting frame 9, a tightening driving device and a primer fixing device 12; the bottom of vertical translation mechanism frame 5 is in with screw up frame 4 fixed connection, guide rail 7 is fixed to be set up vertical translation mechanism frame 5 upper surface, slider 8 sets up on the guide rail 7, vertical translation drive arrangement 6 sets up on the vertical translation mechanism frame 5 and the drive slider 8 is in reciprocating motion on the guide rail 7, mounting bracket 9 lower surface with slider 8 upper surface fixed connection, screw up drive arrangement fixed setting is in mounting bracket 9 upper surface, screw up drive arrangement's output shaft with primer fixing device 12 is connected, it drives to screw up drive arrangement primer fixing device 12 is in mounting bracket 9 upper surface reciprocating motion.
Preferably, the longitudinal translation driving device 6 is a stepping motor, an output shaft of the longitudinal translation driving device 6 is connected with a screw, a nut is fixedly arranged on the lower surface of the sliding block 8, and the nut is arranged on the screw.
Preferably, the primer tightening machine comprises a displacement sensor 13 for detecting the horizontal movement position of the primer fixing device 12, wherein the displacement sensor 13 comprises a travel switch touch plate and a travel switch assembly, the travel switch touch plate is arranged on the mounting frame 9, and the travel switch assembly is arranged on the longitudinal translation mechanism frame 5.
Preferably, the tightening driving device comprises a stepping motor 10 and a speed reducer 11 which are sequentially connected, and an output shaft of the speed reducer 11 penetrates through the mounting frame 9 and is connected with the primer fixing device 12.
Preferably, the primer tightening machine comprises a torque sensor 14 for detecting the torque of the primer fixing device 12, and the torque sensor 14 is sleeved on the output shaft of the speed reducer 11.
Preferably, the primer tightening machine comprises a depth detection sensor 15 for detecting the depth of the primer fixture 12 into the product 16, the depth detection sensor 15 being provided on the primer fixture 12.
Preferably, the lifting mechanism 2 is a hydraulic cylinder or an air cylinder.
The method for screwing the primer by using the primer screwing machine comprises the following steps of:
A. the lifting mechanism 2 drives the clamping device 3 to descend to a preset position, and after the clamping device 3 clamps a product 16, the lifting mechanism 2 drives the clamping device 3 to ascend until the axis of the product is coaxial with the axis of the primer fixing device 12;
B. the longitudinal translation driving device 6 drives the sliding block 8 to move to a preset position on the guide rail 7 along the horizontal direction towards the product 16, and then the longitudinal translation driving device 6 stops working;
C. the tightening driving device is started to drive the primer fixing device 12 to move towards the product along the horizontal direction on the mounting frame 9, in the moving process, after the primer fixing device 12 selects primer into a screw hole of the product 16 to a preset position, the tightening driving device is started to drive the primer fixing device 12 to move away from the product to an initial position along the horizontal direction on the mounting frame 9, and the longitudinal translation driving device 6 drives the sliding block 8 to move away from the product 16 to the initial position along the horizontal direction on the guide rail 7, so that the longitudinal translation driving device 6 stops working;
D. the lifting mechanism 2 drives the clamping device 3 to descend to a preset position, the clamping device 3 loosens the product 16, and after the product 16 falls into the assembly detection conveying line, the lifting mechanism 2 drives the clamping device 3 to ascend to an initial position.
Preferably, the device comprises a displacement sensor 13 for detecting the horizontal movement position of the primer fixing device 12, the displacement sensor 13 comprises a travel switch touch plate and a travel switch assembly, the travel switch touch plate is arranged on the mounting frame 9, the travel switch assembly is arranged on the longitudinal translation mechanism frame 5, the longitudinal translation driving device 6 drives the sliding block 8 to face the product 16 on the guide rail 7 along the horizontal direction, and after the travel switch touch plate is contacted with the travel switch assembly, the longitudinal translation driving device 6 stops working.
Preferably, the device comprises a torque sensor 14 for detecting the torque of the primer fixing device 12 and a depth detection sensor 15 for detecting the depth of the primer fixing device 12 entering the product 16, wherein the torque sensor 14 is sleeved on an output shaft of the speed reducer 11, the depth detection sensor 15 is arranged on the primer fixing device 12, a tightening driving device is started to drive the primer fixing device 12 to move towards the product along the horizontal direction on the mounting frame 9, in the moving process, the primer fixing device 12 selects primer into a screw hole of the product 16, and after the torque sensor 14 and the depth detection sensor 15 reach a preset position, the tightening driving device is started to drive the primer fixing device 12 to move to an initial position along the horizontal direction back to the product on the mounting frame 9.
What is not described in detail in the present specification belongs to the known technology of those skilled in the art.
Claims (4)
1. The primer tightening machine is characterized by comprising a clamping machine and a tightening machine; the clamping machine comprises a clamping frame (1), a lifting mechanism (2) and a clamping device (3), wherein the clamping frame (1) is positioned on one side of an assembly detection conveying line (17), the lifting mechanism (2) is fixedly arranged on the clamping frame (1) and positioned above the assembly detection conveying line (17), and the clamping device (3) is fixedly connected with the lifting mechanism (2);
the tightening machine comprises a tightening frame (4), a longitudinal translation mechanism frame (5), a longitudinal translation driving device (6), a guide rail (7), a sliding block (8), a mounting frame (9), a tightening driving device and a primer fixing device (12); the bottom of the longitudinal translation mechanism frame (5) is fixedly connected with the tightening rack (4), the guide rail (7) is fixedly arranged on the upper surface of the longitudinal translation mechanism frame (5), the sliding block (8) is arranged on the guide rail (7), the longitudinal translation driving device (6) is arranged on the longitudinal translation mechanism frame (5) and drives the sliding block (8) to reciprocate on the guide rail (7), the lower surface of the installation frame (9) is fixedly connected with the upper surface of the sliding block (8), the tightening driving device is fixedly arranged on the upper surface of the installation frame (9), an output shaft of the tightening driving device is connected with the primer fixing device (12), the tightening driving device drives the primer fixing device (12) to reciprocate on the upper surface of the installation frame (9), the lifting mechanism (2) drives the clamping device (3) to descend, the clamping device (3) clamps a product (16), and the lifting mechanism (2) drives the clamping device (3) to ascend to the axis of the product (16) and the axis of the primer fixing device (12) to be coaxial with the axis of the primer fixing device (12);
the tightening machine comprises a displacement sensor (13) for detecting the horizontal movement position of the primer fixing device (12), wherein the displacement sensor (13) comprises a travel switch touch plate and a travel switch assembly, the travel switch touch plate is arranged on the mounting frame (9), and the travel switch assembly is arranged on the longitudinal translation mechanism frame (5);
the tightening driving device comprises a stepping motor (10) and a speed reducer (11) which are sequentially connected, and an output shaft of the speed reducer (11) penetrates through the mounting frame (9) to be connected with the primer fixing device (12);
the primer tightening machine comprises a torque sensor (14) for detecting the torque of a primer fixing device (12), and the torque sensor (14) is sleeved on an output shaft of the speed reducer (11);
the primer tightening machine comprises a depth detection sensor (15) for detecting the depth of the primer fixing device (12) entering the product (16), and the depth detection sensor (15) is arranged on the primer fixing device (12).
2. The primer tightening machine according to claim 1, wherein: the longitudinal translation driving device (6) is a stepping motor, an output shaft of the longitudinal translation driving device (6) is connected with a screw rod, a nut is fixedly arranged on the lower surface of the sliding block (8), and the nut is arranged on the screw rod.
3. The primer tightening machine according to claim 1, wherein: the lifting mechanism is a hydraulic cylinder or an air cylinder.
4. A method of primer tightening using the primer tightening machine of any one of claims 1 to 3, comprising the steps of:
a) The lifting mechanism (2) drives the clamping device (3) to descend to a preset position, and after the clamping device (3) clamps a product (16), the lifting mechanism (2) drives the clamping device (3) to ascend until the axis of the product is coaxial with the axis of the primer fixing device (12);
b) The longitudinal translation driving device (6) drives the sliding block (8) to move towards the product (16) along the horizontal direction on the guide rail (7), and after the travel switch touch plate is contacted with the travel switch assembly, the longitudinal translation driving device (6) stops working;
c) The screwing driving device is started to drive the primer fixing device (12) to move towards the product along the horizontal direction on the mounting frame (9), in the moving process, the primer fixing device (12) screws primer into a screw hole of the product (16), after a torque sensor (14) and a depth detection sensor (15) reach preset positions, the screwing driving device is started to drive the primer fixing device (12) to move to an initial position along the horizontal direction on the mounting frame (9) back to the product, and the longitudinal translation driving device (6) drives the sliding block (8) to move to the initial position along the horizontal direction back to the product (16) on the guide rail (7) and then the longitudinal translation driving device (6) stops working;
d) The lifting mechanism (2) drives the clamping device (3) to descend to a preset position, the clamping device (3) loosens a product (16), and after the product (16) falls into the assembly detection conveying line, the lifting mechanism (2) drives the clamping device (3) to ascend to an initial position.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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CN201710510606.3A CN107270786B (en) | 2017-06-28 | 2017-06-28 | Primer tightening machine and use method thereof |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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CN201710510606.3A CN107270786B (en) | 2017-06-28 | 2017-06-28 | Primer tightening machine and use method thereof |
Publications (2)
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CN107270786A CN107270786A (en) | 2017-10-20 |
CN107270786B true CN107270786B (en) | 2023-11-14 |
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CN201710510606.3A Active CN107270786B (en) | 2017-06-28 | 2017-06-28 | Primer tightening machine and use method thereof |
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Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
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CN108387149B (en) * | 2018-02-01 | 2023-08-01 | 西安核发机电系统工程有限公司 | Primer tightening device and tightening method |
CN108213940A (en) * | 2018-03-14 | 2018-06-29 | 浙江巨龙自动化设备有限公司 | Motor assembling line locks machine and motor assembling line with nut |
Citations (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE689795C (en) * | 1938-07-23 | 1940-04-04 | Rheinmetall Borsig Akt Ges | Device for the automatic screwing together of projectile parts |
CN201020615Y (en) * | 2007-02-28 | 2008-02-13 | 重庆宗申技术开发研究有限公司 | Automatic screw down device for engine box and assembly clamp |
CN106342168B (en) * | 2003-10-08 | 2008-07-30 | 四川省绵阳西南自动化研究所 | The explosion-proof tightening machine of screw-in electric primer |
CN101249608A (en) * | 2008-03-28 | 2008-08-27 | 合肥工业大学 | Preloading device and preloading method for main reducer of automobile |
CN101290205A (en) * | 2008-06-25 | 2008-10-22 | 廊坊智通机器人系统有限公司 | Primer automatic screwing device |
CN205192347U (en) * | 2015-09-30 | 2016-04-27 | 中国人民解放军63908部队 | Scrap shrapnel bullet detonator and unload machine soon |
CN205394820U (en) * | 2016-03-25 | 2016-07-27 | 烟台中科蓝德数控技术有限公司 | Track board steel reinforcement cage automatic feeding and prestressing tendons and stretch -draw pole automatic installation machine |
KR20160135496A (en) * | 2015-05-18 | 2016-11-28 | 국방과학연구소 | Assembling apparatus for missile |
CN106855382A (en) * | 2015-12-09 | 2017-06-16 | 中国科学院沈阳自动化研究所 | A kind of ammunition fuze automatically tightens measuring apparatus |
CN207317647U (en) * | 2017-06-28 | 2018-05-04 | 北京航天三发高科技有限公司 | A kind of fire in a stove before fuel is added tightening machine |
-
2017
- 2017-06-28 CN CN201710510606.3A patent/CN107270786B/en active Active
Patent Citations (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE689795C (en) * | 1938-07-23 | 1940-04-04 | Rheinmetall Borsig Akt Ges | Device for the automatic screwing together of projectile parts |
CN106342168B (en) * | 2003-10-08 | 2008-07-30 | 四川省绵阳西南自动化研究所 | The explosion-proof tightening machine of screw-in electric primer |
CN201020615Y (en) * | 2007-02-28 | 2008-02-13 | 重庆宗申技术开发研究有限公司 | Automatic screw down device for engine box and assembly clamp |
CN101249608A (en) * | 2008-03-28 | 2008-08-27 | 合肥工业大学 | Preloading device and preloading method for main reducer of automobile |
CN101290205A (en) * | 2008-06-25 | 2008-10-22 | 廊坊智通机器人系统有限公司 | Primer automatic screwing device |
KR20160135496A (en) * | 2015-05-18 | 2016-11-28 | 국방과학연구소 | Assembling apparatus for missile |
CN205192347U (en) * | 2015-09-30 | 2016-04-27 | 中国人民解放军63908部队 | Scrap shrapnel bullet detonator and unload machine soon |
CN106855382A (en) * | 2015-12-09 | 2017-06-16 | 中国科学院沈阳自动化研究所 | A kind of ammunition fuze automatically tightens measuring apparatus |
CN205394820U (en) * | 2016-03-25 | 2016-07-27 | 烟台中科蓝德数控技术有限公司 | Track board steel reinforcement cage automatic feeding and prestressing tendons and stretch -draw pole automatic installation machine |
CN207317647U (en) * | 2017-06-28 | 2018-05-04 | 北京航天三发高科技有限公司 | A kind of fire in a stove before fuel is added tightening machine |
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