CN102937548B - Electric wedge clamping device for samples without moving during initial clamping - Google Patents
Electric wedge clamping device for samples without moving during initial clamping Download PDFInfo
- Publication number
- CN102937548B CN102937548B CN201210428630.XA CN201210428630A CN102937548B CN 102937548 B CN102937548 B CN 102937548B CN 201210428630 A CN201210428630 A CN 201210428630A CN 102937548 B CN102937548 B CN 102937548B
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- China
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- collet body
- clamping device
- clamping
- excentric shaft
- transmission mechanism
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Abstract
The invention relates to an electric wedge clamping device for samples without moving during initial clamping, belongs to the technical field of clamps, particularly relates to a wedge clamping device used in tensile tests of material testing machines, and aims to solve problems that the accuracy of test data is reduced and the clamping force discreteness is large caused by manual clamping due to the fact that samples are clamped in a clamp block moving mode in the prior art. The electric wedge clamping device comprises a chuck body, a clamp block, an eccentric shaft, a power transmission mechanism and a deceleration electric motor. The power transmission mechanism is installed on the upper section of the eccentric shaft, and the chuck body is arranged on the lower section of the eccentric shaft; the deceleration electric motor drives the chuck body to move vertically through the power transmission mechanism; and accordingly, the clamping and the loosening of samples are achieved. According to the electric wedge clamping device for samples without moving during initial clamping, the deceleration electric motor is used to drive the chuck body to slide vertically to clamp or loosen samples, and the samples are guaranteed to not move in an initial clamping process, so that obtained test data are accurate; and compared with the hydro-pneumatic clamping, oil pipes and gas pipes are not needed to be connected externally, and the clamping device is pollution-free and noise-free.
Description
Technical field
The invention belongs to clamp technology field, a kind of wedge-shaped clamping device using while being specifically related to Material Testing Machine tension test.
Background technology
In engineering design and various mechanical industry department, in order to guarantee economy, practicality, the safety and reliability of product, must choose suitable material according to the mechanical property of material.Therefore need to test the mechanical property of material, in the tension test of material, clamp sample sample is applied to clamping force by fixture, the clamping mode of fixture directly has influence on the accuracy of determination experiment data.In conventional wedge-shaped clamping device, roughly there is collet body to move with collet body and fix two kinds of modes.Wherein the fixing wedge-shaped clamping device of collet body generally adopts hydraulic pressure or pneumatic mode to drive, it is firm that this method can make clamped sample clamp, but move up and down and clamp in the process of sample at fixture block, can inevitably to sample, apply an axial force, be unfavorable for the accuracy of experimental data.
The clamp device that collet body moves, great majority are for manually to realize the clamping of sample, and labour intensity is large, with manpower, by workpiece location and clamping, clamping force is uncertain, and it is larger that size differs, so cause clamping force discreteness to be difficult to greatly realize larger specification clamping force, inefficiency.
Summary of the invention
The object of the invention is to solve the deficiencies in the prior art, while proposing a kind of initial clamping, sample is without mobile electronic wedge-shaped clamping device.
For achieving the above object, during initial clamping of the present invention, sample comprises collet body, fixture block, excentric shaft, Poewr transmission mechanism and deceleration electric motor without mobile electronic wedge-shaped clamping device, described collet body interior tapered face coordinates with described fixture block, described Poewr transmission mechanism is arranged on the epimere of described excentric shaft, described collet body is arranged on the hypomere of described excentric shaft, and the epimere of described excentric shaft and hypomere have certain eccentric throw; Between described collet body and Poewr transmission mechanism, be provided with the screw thread cooperatively interacting, deceleration electric motor can make collet body move relative to Poewr transmission mechanism by driving Poewr transmission mechanism to rotate, and realizes the clamping of sample and unclamps.
Described collet body bottom coordinates with fixture block, and top is with externally threaded tubular, between described excentric shaft epimere and hypomere, has step A, is fixed with pressing plate bottom by screw, and described fixture block inner side has groove, and described pressing plate gos deep in the groove of fixture block.
Described Poewr transmission mechanism comprises minor sprocket, chain and hinge wheel, described hinge wheel inside upper part coordinates with described excentric shaft epimere, described hinge wheel lower inside is provided with internal thread, coordinate with the external thread on described collet body, described deceleration electric motor by minor sprocket and chain by transmission of power to hinge wheel.
The surface level B of described hinge wheel inside contacts with the step A on excentric shaft.
Described Poewr transmission mechanism is nut, the internal thread of described nut coordinates with the external thread of described collet body, described nut inner hole top is connected with described excentric shaft by one group of rolling bearing, described gear motor is directly installed on collet body, be specially: together with described nut is fixed by screws in the rotor of described deceleration electric motor, guarantee that rotor is coaxial with nut; The stator of electro-motor is affixed by pin and excentric shaft, guarantees stator and rotor coaxial, and guarantees correct air gap delta.
The circular planes C of described nut inside contacts with the step A on described excentric shaft.
Beneficial effect of the present invention is: electronic wedge-shaped clamping device of the present invention adopts deceleration electric motor to drive the upper and lower slippage of collet body and then realizes the clamping to test, clamping process robotization, and while initially clamping, sample is without movement, clamping process is steady, be easy to control, compare hydraulic pressure, pneumatic type of drive, without external oil pipe, gas circuit, pollution-free, noiseless; It is controlled that clamping force is adjustable, can require according to test and sample different, the size of automatic or manual shift clamping force.
Accompanying drawing explanation
The structural representation that when Fig. 1 is initial clamping of the present invention, sample adopts sprocket wheel to connect without mobile electronic wedge-shaped clamping device;
Fig. 2 is the structural representation of excentric shaft in electronic wedge-shaped clamping device of the present invention;
Fig. 3 is the structural representation of hinge wheel in electronic wedge-shaped clamping device of the present invention;
Fig. 4 is the structural representation of collet body in electronic wedge-shaped clamping device of the present invention;
Fig. 5 is the structural representation that electronic wedge-shaped clamping device of the present invention adopts nut to connect;
Fig. 6 is electronic wedge-shaped clamping device scheme of installation of the present invention;
Wherein: 1, collet body, 2, fixture block, 3, excentric shaft, 301, epimere, 302, step A, 303, hypomere, 4, Poewr transmission mechanism, 401, minor sprocket, 402, chain, 403, hinge wheel, 404, nut, 5, deceleration electric motor, 501, stator, 502, rotor, 6, web member, 7, pressing plate, 8, sample.
Embodiment
Below in conjunction with accompanying drawing, the present invention is described further.
Embodiment mono-:
Referring to accompanying drawing 1, during initial clamping of the present invention, sample comprises collet body 1, fixture block 2, excentric shaft 3, Poewr transmission mechanism 4 and deceleration electric motor 5 without mobile electronic wedge-shaped clamping device; Described collet body 1 interior tapered face coordinates with described fixture block 2, and described Poewr transmission mechanism 4 is arranged on the epimere 301 of described excentric shaft 3, and described collet body 1 is arranged on the hypomere 303 of described excentric shaft 3, and the epimere 301 of described excentric shaft 3 and hypomere 303 eccentric throws are e; Between described collet body 1 and Poewr transmission mechanism 4, adopt and be threaded, deceleration electric motor 5 drives Poewr transmission mechanisms 4 rotations, drives collet body 1 to move up and down; And then realize the clamping of sample 8 and unclamp.
Described Poewr transmission mechanism 4 comprises minor sprocket 401, chain 402 and hinge wheel 403, deceleration electric motor 5 is fixed on web member 6, web member 6 is affixed by pin and excentric shaft 3, deceleration electric motor 5 is by minor sprocket 401, chain 402 by transmission of power to hinge wheel 403, referring to accompanying drawing 3, the female hinge wheel 403 of tool is around excentric shaft 3 epimere 301 center rotatings, hinge wheel 403 is arranged on an eccentric shaft 3 with collet body 1, referring to accompanying drawing 4, external thread is arranged at described collet body 1 top, be threaded with employing between hinge wheel 403, the drive that rotatablely moves of hinge wheel 403 has externally threaded collet body 1 and moves up and down along excentric shaft 3 hypomeres 303.Referring to accompanying drawing 2, because hypomere 303 and the epimere 301 of excentric shaft 3 exists eccentric distance e, so collet body 1 can only do rectilinear motion along excentric shaft 3, and can not rotatablely move.Excentric shaft 3 epimeres 301 have step A302, contact with a surface level B of hinge wheel 403, bear the axial force in clamping process and process of the test.Excentric shaft 3 hypomeres 303 are connected by screw a pressing plate 7, and pressing plate 7 stretches in the groove of fixture block.When collet body 1 moves upward along excentric shaft 3, the residing wedge shape space of fixture block narrows down, and collet body 1 interacts with the inclined-plane that coordinates of fixture block, and two fixture blocks are shunk to center, and sample 8 is applied to acting force.Equally, when collet body 1 moves downward, the residing wedge shape space of fixture block broadens, and sample 8 is relaxed.In the process that clamps or loosen, pressing plate 7 stops two fixture blocks 2 to do axially-movable along excentric shaft 3.Fixture block is in the wedge shape space of collet body 1 inside, and when collet body 1 moves up and down, the residing wedge shape space width of fixture block changes, and realizes the clamping of sample 8 and loosens.
Embodiment bis-:
Referring to accompanying drawing 5, the difference of the present embodiment and embodiment mono-is that drive unit adopts electro-motor to be directly installed to the mode on collet body 1, described Poewr transmission mechanism 4 is nut 404, described deceleration electric motor 5 by nut 404 by transmission of power to collet body 1, realize collet body 1 and move up and down, and then realize the clamping of sample 8 or unclamp; The endoporus of nut 404 has internal thread, coordinates with the external thread of collet body 1; The central upper portion of nut 404 is connected with excentric shaft 3 by one group of rolling bearing, makes nut 404 and excentric shaft 3 radial locations, and its inner circular planes contacts with the step A302 of excentric shaft 3, bears the axial load in clamping process and process of the test.Together with nut 404 is fixed by screws in the rotor 502 of electro-motor, guarantee that rotor 502 is coaxial with nut 404.The stator 501 of deceleration electric motor 5 is affixed by pin and excentric shaft 3, guarantees that stator 501 is coaxial with rotor 502, and guarantees correct air gap delta.
When deceleration electric motor 5 passes to electric current, the rotating magnetic field rotor driven 502 in air gap delta, together with nut 404, around excentric shaft 3 epimere 301 center line rotations, makes collet body 1 do rectilinear motion along excentric shaft 3, clamps sample 8.
Embodiment tri-:
Referring to accompanying drawing 6, when the present invention installs and uses on testing machine, upper and lower two clamp devices are used in pairs, guarantee that upper and lower two collet bodies 1 coaxially install.
In clamping process, sample 8 is without mobile, and in clamping process, when sprocket wheel rotarily drives collet body 1 and moves up and down, fixture block is fixed with sample 8, can not move thereupon, and the spacing h of upper and lower two pairs of fixture blocks remains constant in whole clamping process.Therefore, during clamping, sample 8, without axial deformation, is not subject to axial force, has guaranteed 8 effects of bearing test force of sample in process of the test, and test findings is more accurate.
Claims (5)
1. while initially clamping, sample is without mobile electronic wedge-shaped clamping device, comprise collet body (1), fixture block (2), described collet body (1) interior tapered face coordinates with described fixture block (2), it is characterized in that, also comprise excentric shaft (3), Poewr transmission mechanism (4) and deceleration electric motor (5); Described Poewr transmission mechanism (4) is arranged on the epimere (301) of described excentric shaft (3), described collet body (1) is arranged on the hypomere (303) of described excentric shaft (3), and epimere (301) and the hypomere (303) of described excentric shaft (3) have certain eccentric throw; Between described collet body (1) and Poewr transmission mechanism (4), be provided with the screw thread cooperatively interacting, deceleration electric motor (5) can be by driving Poewr transmission mechanism (4) to rotate, collet body (1) is moved relative to Poewr transmission mechanism (4), realize the clamping of sample (8) and unclamp;
Described collet body (1) bottom coordinates with fixture block (2), top is with externally threaded tubular, between described excentric shaft (3) epimere (301) and hypomere (303), there is step A (302), by screw, be fixed with pressing plate (7) bottom, described fixture block (2) inner side has groove, and described pressing plate (7) gos deep in the groove of fixture block (2).
During initial clamp according to claim 1 sample without mobile electronic wedge-shaped clamping device, it is characterized in that, described Poewr transmission mechanism (4) comprises minor sprocket (401), chain (402) and hinge wheel (403), described hinge wheel (403) inside upper part coordinates with described excentric shaft (3) epimere (301), described hinge wheel (403) lower inside is provided with internal thread, coordinate with the external thread on described collet body (1), described deceleration electric motor (5) by minor sprocket (401) and chain (402) by transmission of power to hinge wheel (403).
3. sample, without mobile electronic wedge-shaped clamping device, is characterized in that during initial clamp according to claim 2, and the inner surface level B of described hinge wheel (403) contacts with the step A on excentric shaft (3).
During initial clamp according to claim 1 sample without mobile electronic wedge-shaped clamping device, it is characterized in that, described Poewr transmission mechanism (4) is nut (404), the internal thread of described nut (404) coordinates with the external thread of described collet body (1), described nut (404) endoporus top is connected with described excentric shaft (3) by one group of rolling bearing, described gear motor is directly installed on collet body (1), be specially: together with described nut (404) is fixed by screws in the rotor (502) of described deceleration electric motor (5), guarantee that rotor (502) is coaxial with nut (404), the stator of electro-motor (501) is affixed by pin and excentric shaft (3), guarantees that stator (501) is coaxial with rotor (502), and guarantees correct air gap.
5. sample, without mobile electronic wedge-shaped clamping device, is characterized in that during initial clamp according to claim 4, and the inner circular planes C of described nut (404) contacts with the step A on described excentric shaft (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210428630.XA CN102937548B (en) | 2012-10-31 | 2012-10-31 | Electric wedge clamping device for samples without moving during initial clamping |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210428630.XA CN102937548B (en) | 2012-10-31 | 2012-10-31 | Electric wedge clamping device for samples without moving during initial clamping |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102937548A CN102937548A (en) | 2013-02-20 |
| CN102937548B true CN102937548B (en) | 2014-10-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210428630.XA Expired - Fee Related CN102937548B (en) | 2012-10-31 | 2012-10-31 | Electric wedge clamping device for samples without moving during initial clamping |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102937548B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103454148A (en) * | 2013-09-03 | 2013-12-18 | 张家港市胜达钢绳有限公司 | Steel wire clamping device and steel wire tension testing system |
| CN103454147A (en) * | 2013-09-03 | 2013-12-18 | 张家港市胜达钢绳有限公司 | Steel wire clamping device and steel wire tension testing system |
| CN114544340A (en) * | 2022-02-10 | 2022-05-27 | 武汉钢铁有限公司 | Metal material strain fatigue testing device and method based on corrosion environment |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5061125A (en) * | 1989-08-23 | 1991-10-29 | Cross Europa-Werk, Gmbh | Boring device |
| CN2132582Y (en) * | 1992-07-22 | 1993-05-12 | 夏继华 | Electric taut (press) device for spindle of lathe |
| US5888033A (en) * | 1997-10-09 | 1999-03-30 | Zagar, Inc. | Precision quill-feed unit |
| CN2860690Y (en) * | 2005-12-27 | 2007-01-24 | 杨金平 | Lathe clamping device |
| CN201218788Y (en) * | 2008-06-05 | 2009-04-08 | 黑龙江科技学院 | Test member clamping apparatus |
| CN201965058U (en) * | 2011-03-22 | 2011-09-07 | 上海大学 | Traction clamping mechanism for tensile test of small sample |
-
2012
- 2012-10-31 CN CN201210428630.XA patent/CN102937548B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5061125A (en) * | 1989-08-23 | 1991-10-29 | Cross Europa-Werk, Gmbh | Boring device |
| CN2132582Y (en) * | 1992-07-22 | 1993-05-12 | 夏继华 | Electric taut (press) device for spindle of lathe |
| US5888033A (en) * | 1997-10-09 | 1999-03-30 | Zagar, Inc. | Precision quill-feed unit |
| CN2860690Y (en) * | 2005-12-27 | 2007-01-24 | 杨金平 | Lathe clamping device |
| CN201218788Y (en) * | 2008-06-05 | 2009-04-08 | 黑龙江科技学院 | Test member clamping apparatus |
| CN201965058U (en) * | 2011-03-22 | 2011-09-07 | 上海大学 | Traction clamping mechanism for tensile test of small sample |
Non-Patent Citations (4)
| Title |
|---|
| 台虎钳的巧改与巧用;李军利;《金属加工》;20120331(第6期);42-43页 * |
| 新型快速夹紧台虎钳的设计与应用;陈强;《轻工机械》;20100831;第28卷(第4期);111-112页及122页 * |
| 李军利.台虎钳的巧改与巧用.《金属加工》.2012,(第6期),42-43页. |
| 陈强.新型快速夹紧台虎钳的设计与应用.《轻工机械》.2010,第28卷(第4期),111-112页及122页. |
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|---|---|
| CN102937548A (en) | 2013-02-20 |
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Granted publication date: 20141008 Termination date: 20151031 |
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