CN108406630B - Anti-deformation automatic protection air pressure bench vice - Google Patents
Anti-deformation automatic protection air pressure bench vice Download PDFInfo
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- CN108406630B CN108406630B CN201810476644.6A CN201810476644A CN108406630B CN 108406630 B CN108406630 B CN 108406630B CN 201810476644 A CN201810476644 A CN 201810476644A CN 108406630 B CN108406630 B CN 108406630B
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- China
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- jaw module
- telescopic
- push plate
- fixed
- rear end
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B1/00—Vices
- B25B1/06—Arrangements for positively actuating jaws
- B25B1/10—Arrangements for positively actuating jaws using screws
- B25B1/103—Arrangements for positively actuating jaws using screws with one screw perpendicular to the jaw faces, e.g. a differential or telescopic screw
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B1/00—Vices
- B25B1/24—Details, e.g. jaws of special shape, slideways
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Jigs For Machine Tools (AREA)
Abstract
The invention provides an anti-deformation automatic protection pneumatic bench vice, which comprises a fixed jaw module, wherein a sliding groove is arranged on one side of the fixed jaw module, which is opposite to a movable jaw module, a push plate is assembled in the sliding groove in a sliding manner, a piezoelectric material is arranged on the front end surface of the push plate, and a telescopic rod is vertically fixed on the rear end surface of the push plate; a telescopic hole is formed in the rear end face of the sliding groove, an electromagnetic valve is assembled at the rear end of the telescopic hole in a sealing mode, and the electromagnetic valve is connected with the piezoelectric material through a lead; the rear end of the telescopic rod is provided with a piston, and the piston is assembled in the telescopic hole in a sliding manner; this automatic protection air pressure bench vice of preapring for an unfavorable turn of events shape is the change of the clamp force that the regulation automated inspection work piece that passes through atmospheric pressure received when step-up, when appearing excessively step-up, thereby the automatic protection work piece that loosens has shortened the clamping of work piece and has corrected long, has improved the device of clamping efficiency.
Description
Technical Field
The invention relates to the field of clamps, in particular to an air pressure clamp.
Background
The jig is a device for fixing a processing object to occupy a correct position for receiving construction or inspection in a machine manufacturing process, and is also called a jig. The clamping device is generally composed of a positioning element, a clamping device, a tool setting guide element, an indexing device, a connecting element, a clamping body and the like. When the existing clamp clamps a workpiece, two parallel surfaces of the workpiece are generally taken as reference surfaces, and then the workpiece is clamped through a clamping device on the clamp; when the material texture of the workpiece is soft, a user must reasonably control the clamping force during clamping, if the clamping force is too small, the clamping of the workpiece is loosened, and the workpiece moves during processing; if the clamping force is too large, the workpiece is extruded and deformed; the existing clamp is not provided with a device capable of detecting the clamping force, and a user also carries out manual measurement during clamping, so that the clamping error is large, and the clamping precision of a workpiece is not improved; meanwhile, the workpiece should be stressed stably in the clamping process, and a user has errors in controlling the clamping force during manual clamping, so that the workpiece is damaged. In addition, when a large amount of workpieces are processed, a user needs to repeatedly perform the processes of clamping and disassembling, the process is complicated, more time needs to be spent when the clamping force is adjusted by the user, and the improvement of the processing efficiency is not facilitated. In summary, there are drawbacks.
Disclosure of Invention
In view of the above problems, an object of the present invention is to provide an anti-deformation automatic-protection pneumatic bench vice, which automatically detects the change of the clamping force applied to a workpiece during clamping through the adjustment of the air pressure, and automatically releases the workpiece when the workpiece is excessively clamped, so as to protect the workpiece. In addition, the clamping and correcting time of the workpiece is shortened, and the clamping efficiency is improved.
The technical scheme adopted by the invention for solving the technical problem is as follows: the deformation-preventing automatic protective air pressure bench vice comprises a fixed jaw module; the bottom of the fixed jaw module is provided with a turntable seat, a sliding hole is formed in the fixed jaw module, a nut is fixedly installed in the sliding hole, and a screw rod is assembled in the nut; a movable jaw module is arranged in front of the fixed jaw module, the movable jaw module comprises a screw rod rocker, the screw rod rocker is assembled at the end part of the screw rod, and the movable jaw module is in transmission connection with the fixed jaw module through the screw rod; a sliding groove is formed in one side, opposite to the movable jaw module, of the fixed jaw module, a push plate is assembled in the sliding groove in a sliding mode, a piezoelectric material is arranged on the front end face of the push plate, and a telescopic rod is vertically fixed on the rear end face of the push plate; a telescopic hole is formed in the rear end face of the sliding groove, an electromagnetic valve is assembled at the rear end of the telescopic hole in a sealing mode, and the electromagnetic valve is connected with the piezoelectric material through a lead; the rear end of the telescopic rod is provided with a piston, and the piston is assembled in the telescopic hole in a sliding mode.
Preferably, the telescopic rod, the piston and the electromagnetic valves are arranged into two symmetrical groups, and the electromagnetic valves are provided with manual switches.
Preferably, the movable jaw is provided with a positioning module, the positioning module comprises a fixed plate and a telescopic plate, the edge of the inner side of the fixed plate and the edge of the outer side of the push plate are on the same straight line, the telescopic plate is provided with a fixed block, and a spring is connected between the fixed block and the telescopic plate.
Preferably, a barometer is arranged in the telescopic hole, and an external pressure index meter is arranged on the barometer.
The invention has the beneficial effects that: when the anti-deformation automatic protection air pressure bench vice is used, a user firstly rotates the screw rod rocker to adjust the screw rod, and the distance between the fixed jaw module and the movable jaw module is adjusted to a proper distance; then, a workpiece is placed between the fixed jaw module and the movable jaw module, the reference surface of the workpiece is aligned to the push plate, and then the lead screw is continuously adjusted, so that the movable jaw module moves towards one side of the fixed jaw module, and the workpiece is slowly clamped by the movable jaw module and the push plate; when the workpiece is clamped to a certain degree, the push plate is subjected to the reverse thrust of the workpiece, and the force acts on the piezoelectric material on the push plate, so that the piezoelectric material generates an electric signal; when an electric signal is transmitted to the electromagnetic valve through the lead, the electromagnetic valve is closed, so that a closed space is formed in the telescopic hole; the workpiece can continuously apply thrust to the push plate in the clamping process, so that the telescopic rod drives the piston to move towards the inner side of the telescopic hole, and the air pressure in the telescopic hole is increased along with the movement; in the process, the thrust generated by clamping the workpiece can be slowly absorbed by the air pressure in the telescopic hole, so that the workpiece is uniformly and slowly stressed, and the phenomenon that the workpiece is damaged due to overlarge stress is avoided.
When the clamped workpiece reaches the optimal clamping force, the pushing force on the push plate is constant; if the user continues to clamp the workpiece, the workpiece is bent and deformed due to overlarge clamping force, the rigidity of the workpiece is changed, the thrust on the push plate is reduced, and the piezoelectric material on the push plate generates an electric signal again due to the change of the force; the electric signal acts on the electromagnetic valve, so that the electromagnetic valve is opened, at the moment, the gas in the telescopic hole is released, the internal air pressure of the telescopic hole is balanced in the external air pressure, the clamping force of the push plate on the workpiece disappears, the workpiece is not clamped any more, the phenomenon that the workpiece is scrapped due to excessive clamping is avoided, and the effect of protecting the workpiece is achieved. The user only needs to close when changing the work piece the solenoid valve promotes the push pedal is placed the work piece again the fixed jaw module reaches between the movable jaw module, the repeated clamping can of carrying out, such operation can shorten the work piece when the clamping the sliding distance of movable jaw module shortens the clamping time, very big improvement clamping efficiency.
Drawings
Fig. 1 is a left side view of the deformation preventing automatic protective air pressure bench vice of the present invention.
Fig. 2 is a plan view of the deformation-preventing automatic-protection air pressure bench vice of the present invention.
Fig. 3 is a top view of the anti-deformation automatic protection pneumatic bench vice of the present invention.
Detailed Description
The invention is further illustrated with reference to the following figures and examples:
as shown in fig. 1, 2 and 3, the deformation-preventing automatic-protection air pressure bench vice is used for automatically detecting the change of clamping force applied to a workpiece during clamping through air pressure adjustment, and automatically releases to protect the workpiece when excessive clamping occurs. In addition, the device shortens the time for clamping and correcting the workpiece and improves the clamping efficiency, and comprises a fixed jaw module 1; the bottom of the fixed jaw module 1 is provided with a turntable base 10, a sliding hole is formed in the fixed jaw module 1, a nut is fixedly installed in the sliding hole, and a screw rod 3 is assembled in the nut; a movable jaw module 2 is arranged in front of the fixed jaw module 1, the movable jaw module 2 comprises a screw rod 3 rocker, the screw rod 3 rocker is assembled at the end part of the screw rod 3, and the movable jaw module 2 is in transmission connection with the fixed jaw module 1 through the screw rod 3; a sliding groove is formed in one side, opposite to the movable jaw module 2, of the fixed jaw module 1, a push plate 11 is assembled in the sliding groove in a sliding mode, a piezoelectric material is arranged on the front end face of the push plate 11, and a telescopic rod 12 is vertically fixed on the rear end face of the push plate 11; a telescopic hole is formed in the rear end face of the sliding groove, an electromagnetic valve 14 is assembled at the rear end of the telescopic hole in a sealing mode, and the electromagnetic valve 14 is connected with the piezoelectric material through a lead; the rear end of the telescopic rod 12 is provided with a piston 13, and the piston 13 is assembled in the telescopic hole in a sliding mode.
When the anti-deformation automatic protection air pressure bench vice is used, a user firstly rotates the lead screw 3 to adjust the lead screw 3 through rotating the lead screw 3 rocker, and the distance between the fixed jaw module 1 and the movable jaw module 2 is adjusted to be a proper distance; then, a workpiece 4 is placed between the fixed jaw module 1 and the movable jaw module 2, the reference surface of the workpiece 4 is aligned to the push plate 11, and then the screw rod 3 is continuously adjusted, so that the movable jaw module 2 moves towards one side of the fixed jaw module 1, and at the moment, the workpiece 4 is slowly clamped by the movable jaw module 2 and the push plate 11; when the workpiece 4 is clamped to a certain degree, the push plate 11 is subjected to the reverse thrust of the workpiece 4, and the force acts on the piezoelectric material on the push plate 11, so that the piezoelectric material generates an electric signal; when an electric signal is transmitted to the electromagnetic valve 14 through the lead, the electromagnetic valve 14 is closed, so that a closed space is formed in the telescopic hole; the workpiece 4 can continuously apply thrust to the push plate 11 in the clamping process, so that the telescopic rod 12 drives the piston 13 to move towards the inner side of the telescopic hole, and the air pressure in the telescopic hole is increased along with the movement; in the process, the air pressure in the telescopic hole can slowly absorb the thrust generated by clamping the workpiece 4, so that the workpiece 4 is uniformly and slowly stressed, and the phenomenon that the workpiece 4 is damaged due to overlarge stress is avoided.
When the clamped workpiece 4 reaches the optimal clamping force, the pushing force on the push plate 11 is constant; if the user continues to clamp the workpiece 4, the workpiece 4 is bent and deformed due to overlarge clamping force, the rigidity of the workpiece 4 is changed, the thrust on the push plate 11 is reduced, and the piezoelectric material on the push plate 11 generates an electric signal again due to the change of the force; the electric signal acts on the electromagnetic valve 14, so that the electromagnetic valve 14 is opened, at the moment, the gas in the telescopic hole is released, the internal air pressure of the telescopic hole is balanced with the external air pressure, the clamping force of the push plate 11 on the workpiece 4 disappears, the workpiece 4 is not clamped any more, the phenomenon that the workpiece 4 is scrapped due to excessive clamping is avoided, and the effect of protecting the workpiece 4 is achieved. The user only needs to close when changing work piece 4 the solenoid valve 14 promotes push pedal 11 places work piece 4 again the fixed module of keeping silent 1 reaches between the movable vice jaw module 2, the repeated clamping can of carrying out, such operation can shorten work piece 4 when the clamping the sliding distance of movable vice jaw module 2 shortens the clamping time, very big improvement clamping efficiency.
As shown in fig. 2 and 3, the telescopic rod 12, the piston 13 and the electromagnetic valve 14 are symmetrically arranged in two groups, and the electromagnetic valve 14 is provided with a manual switch. The clamping force borne by the workpiece 4 is absorbed through a plurality of symmetrical positions, the effect of stress balance of the workpiece 4 can be enhanced, and in addition, the manual switch can greatly simplify the operation of repeated clamping.
As shown in fig. 2 and 3, a positioning module is arranged on the movable jaw and comprises a fixed plate and a telescopic plate, the inner edge of the fixed plate and the outer edge of the push plate 11 are on the same straight line, a fixed block is arranged on the telescopic plate, and a spring is connected between the fixed block and the telescopic plate. Through the fixed plate and the transverse clamping of the telescopic plate, the workpiece 4 can be positioned in a self-adaptive manner, so that the subsequent clamping operation is facilitated.
As shown in fig. 1, a barometer is arranged in the telescopic hole, and an external pressure index meter is arranged on the barometer. The user can carry out the control of certain degree to the clamp force that work piece 4 received through observing the index of barometer, has avoided the operation of repeated clamping for the clamping of work piece 4 can one step put in place.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, but rather as the subject matter of the invention is to be construed in all aspects and as broadly as possible, and all changes, equivalents and modifications that fall within the true spirit and scope of the invention are therefore intended to be embraced therein.
Claims (3)
1. An anti-deformation automatic protection air pressure bench vice comprises a fixed jaw module (1); a turntable seat (10) is arranged at the bottom of the fixed jaw module (1), a sliding hole is formed in the fixed jaw module (1), a nut is fixedly installed in the sliding hole, and a screw rod (3) is assembled in the nut; the place ahead of fixed jaw module (1) is provided with movable jaw module (2), movable jaw module (2) includes lead screw (3) rocker, lead screw (3) rocker assembly is in the tip of lead screw (3), movable jaw module (2) pass through lead screw (3) with fixed jaw module (1) transmission is connected, its characterized in that: a sliding groove is formed in one side, opposite to the movable jaw module (2), of the fixed jaw module (1), a push plate (11) is assembled in the sliding groove in a sliding mode, a piezoelectric material is arranged on the front end face of the push plate (11), and a telescopic rod (12) is vertically fixed on the rear end face of the push plate (11); a telescopic hole is formed in the rear end face of the sliding groove, an electromagnetic valve (14) is assembled at the rear end of the telescopic hole in a sealing mode, and the electromagnetic valve (14) is connected with the piezoelectric material through a lead; the rear end of the telescopic rod (12) is provided with a piston (13), and the piston (13) is assembled in the telescopic hole in a sliding manner; the movable jaw is provided with a positioning module, the positioning module comprises a fixed plate and a telescopic plate, the edge of the inner side of the fixed plate and the edge of the outer side of the push plate (11) are on the same straight line, the telescopic plate is provided with a fixed block, and a spring is connected between the fixed block and the telescopic plate.
2. The deformation-preventing automatic-protection pneumatic bench vice as claimed in claim 1, wherein: the telescopic rod (12), the piston (13) and the electromagnetic valves (14) are symmetrically arranged in two groups, and the electromagnetic valves (14) are provided with manual switches.
3. The deformation-preventing automatic-protection pneumatic bench vice as claimed in claim 1, wherein: a barometer is arranged in the telescopic hole, and an external pressure index meter is arranged on the barometer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810476644.6A CN108406630B (en) | 2018-05-18 | 2018-05-18 | Anti-deformation automatic protection air pressure bench vice |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810476644.6A CN108406630B (en) | 2018-05-18 | 2018-05-18 | Anti-deformation automatic protection air pressure bench vice |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108406630A CN108406630A (en) | 2018-08-17 |
| CN108406630B true CN108406630B (en) | 2020-10-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810476644.6A Active CN108406630B (en) | 2018-05-18 | 2018-05-18 | Anti-deformation automatic protection air pressure bench vice |
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| CN (1) | CN108406630B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109396904A (en) * | 2018-10-20 | 2019-03-01 | 武汉雅虎光电设备有限公司 | A kind of Pneumatic flat tongs for miniature precision shaped piece |
| CN109877508B (en) * | 2019-03-08 | 2024-07-23 | 敏实汽车技术研发有限公司 | Be applied to aluminium battery case welded self-align floating mechanism |
| CN111688076B (en) * | 2020-04-27 | 2021-10-01 | 海安迪斯凯瑞探测仪器有限公司 | Anti-deformation high-precision integrated automatic die assembly system |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB230080A (en) * | 1924-03-01 | 1925-08-27 | Rudolf Joksch | Improvements in and connected with clamps, vices, and other gripping or holding devices |
| EP0115474A2 (en) * | 1983-02-01 | 1984-08-08 | Roger Gloor | Accessory device for machine vices |
| DE3627067A1 (en) * | 1986-08-09 | 1988-02-11 | Heringer & Schipper Gmbh | Compensating jaw for clamping devices |
| KR100648532B1 (en) * | 2006-08-18 | 2006-11-29 | (주) 대진유압기계 | Spring type automatic return oil pressure tool |
| CN201432430Y (en) * | 2009-04-09 | 2010-03-31 | 高尔荣 | Overload protection device for punch press |
| CN104476426A (en) * | 2014-12-21 | 2015-04-01 | 庞勇 | Jaw vice with clamping force measuring device |
| CN105151323A (en) * | 2015-09-10 | 2015-12-16 | 兰州空间技术物理研究所 | Connecting device suitable for extra-cabin handle of spacecraft |
| CN106625306A (en) * | 2017-03-02 | 2017-05-10 | 瑞安市智造科技有限公司 | Bidirectional electromagnetic type bench vice |
| CN105729330B (en) * | 2016-04-19 | 2017-06-09 | 苏州宏奇锐自动化有限公司 | One kind is automatically positioned clamping bench vice |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202240502U (en) * | 2011-09-08 | 2012-05-30 | 江阴市长龄机械制造有限公司 | Buffer for hydraulic clamp |
-
2018
- 2018-05-18 CN CN201810476644.6A patent/CN108406630B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB230080A (en) * | 1924-03-01 | 1925-08-27 | Rudolf Joksch | Improvements in and connected with clamps, vices, and other gripping or holding devices |
| EP0115474A2 (en) * | 1983-02-01 | 1984-08-08 | Roger Gloor | Accessory device for machine vices |
| DE3627067A1 (en) * | 1986-08-09 | 1988-02-11 | Heringer & Schipper Gmbh | Compensating jaw for clamping devices |
| KR100648532B1 (en) * | 2006-08-18 | 2006-11-29 | (주) 대진유압기계 | Spring type automatic return oil pressure tool |
| CN201432430Y (en) * | 2009-04-09 | 2010-03-31 | 高尔荣 | Overload protection device for punch press |
| CN104476426A (en) * | 2014-12-21 | 2015-04-01 | 庞勇 | Jaw vice with clamping force measuring device |
| CN105151323A (en) * | 2015-09-10 | 2015-12-16 | 兰州空间技术物理研究所 | Connecting device suitable for extra-cabin handle of spacecraft |
| CN105729330B (en) * | 2016-04-19 | 2017-06-09 | 苏州宏奇锐自动化有限公司 | One kind is automatically positioned clamping bench vice |
| CN106625306A (en) * | 2017-03-02 | 2017-05-10 | 瑞安市智造科技有限公司 | Bidirectional electromagnetic type bench vice |
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| Publication number | Publication date |
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| CN108406630A (en) | 2018-08-17 |
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| TA01 | Transfer of patent application right | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20201012 Address after: 276800 Li Jia Hu Village, happy town, Arashiyama District, Rizhao City, Shandong Applicant after: SHANDONG HUAYUAN RIGGING Co.,Ltd. Address before: 528000 228, 1 floor of 1 harvest 1 Street, Chao'an Road, Chancheng District, Foshan, Guangdong Applicant before: FOSHAN BENDA PUFEI AUTOMATION Co.,Ltd. |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of invention: Anti deformation automatic protection pneumatic Bench Vise Effective date of registration: 20211119 Granted publication date: 20201030 Pledgee: Lanshan Branch of Rizhao Bank Co.,Ltd. Pledgor: SHANDONG HUAYUAN RIGGING Co.,Ltd. Registration number: Y2021980012823 |