CN202562808U - Sample prestress clamping device - Google Patents
Sample prestress clamping device Download PDFInfo
- Publication number
- CN202562808U CN202562808U CN2012202018167U CN201220201816U CN202562808U CN 202562808 U CN202562808 U CN 202562808U CN 2012202018167 U CN2012202018167 U CN 2012202018167U CN 201220201816 U CN201220201816 U CN 201220201816U CN 202562808 U CN202562808 U CN 202562808U
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- sample
- screw bolt
- cramping body
- locking double
- fixture block
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- Expired - Fee Related
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Abstract
The utility model provides a sample prestress clamping device, belongs to the field of testing machine clamps, and solves the problems of low measurement accuracy, complicated operation, and a complex structure of a device exerting pre-tightening force in a material tensile test. The sample prestress clamping device comprises a locking double-screw bolt, a clamping body, a clamping block, a gasket and a fixture, wherein the fixture is in clearance fit with the clamping body, the clamping body is connected with the locking double-screw bolt through threads, the clamping block is matched with an inner conical bore of the clamping body, the gasket is located between the clamping block and the locking double-screw bolt, one end of the locking double-screw bolt is provided with an outer hexagonal head, the other end of the locking double-screw bolt is provided with a cylinder, the middle of the locking double-screw bolt is provided with a through hole with a diameter bigger than a maximum sectional dimension of a sample, and the cylinder at the other end of the locking double-screw bolt is provided with external threads. According to the sample prestress clamping device, a large alteration of an original structure is not needed, and the device exerting pre-tightening force is simple in structure and easy to operate. The clamping block is pushed to exert pre-tightening force on the sample through the threads, and therefore slip of the sample in a test can be reduced or eliminated, and improvement of the measurement accuracy is facilitated.
Description
Technical field
The utility model belongs to the grip of testing machine field, is specifically related to a kind of sample prestress clamp device.
Background technology
In material tensile test, to the firm degree of the clamping of sample directly determining test figure accurately whether; Initial clamping force size is extremely important for the relative slippage that reduces sample, and in order to reduce this slippage, people adopt mode artificial or hydraulic pressure usually, promote wedge block, make it apply an initial clamping force to sample.During wedge shape commonly used clamps; Be along receiving moving of force direction by sample in the sample drawing process; Driving wedge block through initial friction force moves and makes sample receive the horizontal clamping force that increases along with tensile force; Sample can produce elasticity and plastic yield when this horizontal clamping force was enough big, made the tooth of cramping body get in the sample top layer, thereby kept the relative position of sample and anchor clamps constant basically.Existing sample clamp device precision is low, implementation and operation is complicated, and the apparatus structure that applies pretightning force is complicated.Therefore, a kind of clamping accuracy of needs is high, implementation and operation is simple, applies the simple sample prestress of the apparatus structure clamp device of pretightning force.
Summary of the invention
The purpose of the utility model is to propose a kind of sample prestress clamp device; Solution measuring accuracy in material tensile test is low, implementation and operation is complicated and apply pretightning force apparatus structure complicated problems; Under the prerequisite of being convenient to the sample installation; Reduce in the tension test process sample with respect to the slippage of anchor clamps, improve test accuracy, improve the reliability of machine works.
A kind of sample prestress of the utility model clamp device comprises sample holder device and anchor clamps, and said sample holder device comprises locking double-screw bolt, cramping body, fixture block and pad; Said anchor clamps and cramping body clearance fit, cramping body and locking double-screw bolt are through being threaded, and the shape of said fixture block cooperates with the female cone hole of cramping body, and said pad is at fixture block and lock between the double-screw bolt; One end of said locking double-screw bolt is the outer-hexagonal head, and the other end is for being provided with externally threaded right cylinder, and the centre is the through hole of diameter greater than the sample largest cross-sectional sized.
Described cramping body is a right cylinder, and the centre has through hole, and the through hole the first half in the middle of the cramping body has internal thread; Cooperate with the external thread of said locking double-screw bolt; The latter half is a bellmouth, cooperates with said fixture block, and the aperture of the internal thread of said cramping body is greater than the maximum gauge of cramping body bellmouth; The two ends of cramping body outer cylinder surface respectively are processed with the plane of two symmetries.
Described anchor clamps are U-shaped spare, have elongated slot in the middle of the anchor clamps, and said elongated slot cooperates with the plane at cramping body two ends.
Described fixture block is made up of plural long strip shaped piece, and the fixture block outside surface that said long strip shaped piece constitutes is conical.
The beneficial effect of the utility model is: this sample prestress clamp device need not original structure is done bigger change, and processing and manufacturing is easy, and the apparatus structure that applies pretightning force is simple; Clamping device was exactly the annex of testing machine originally, directly was fixed on anchor clamps on the machine again, and the user just can utilize it to reach the purpose that applies pretightning force easily, and implementation and operation is easy; Promote fixture block through engage thread sample is applied pretightning force, the skidding of sample helps improving the measuring accuracy of test in the time of can reducing or eliminate test, improves the reliability of experiment and the credibility of data.
Description of drawings
Fig. 1 is the perspective view of a kind of sample prestress of the utility model clamp device;
Fig. 2 is the cut-open view of clamping device in the utility model;
Fig. 3 is the vertical view of clamping device in the utility model;
Fig. 4 is the structural drawing of fixture block in the utility model;
Fig. 5 is the cut-open view of cramping body in the utility model;
Fig. 6 is the vertical view of cramping body in the utility model;
Fig. 7 is the cut-open view of locking double-screw bolt in the utility model;
Fig. 8 is the vertical view of locking double-screw bolt in the utility model;
Fig. 9 is installed in the operation chart on the testing machine for a kind of sample prestress of the utility model clamp device.
Wherein, 1, the locking double-screw bolt, 2, cramping body, 3, fixture block, 4, sample, 5, anchor clamps, 6, the support of testing machine, 7, screw, 8, apply the instrument of moment of torsion, 9, pad.
Embodiment
Below in conjunction with accompanying drawing the utility model is further described.
Embodiment one:
Like Fig. 1, Fig. 2, Fig. 3, Fig. 7, shown in Figure 8, a kind of sample prestress of the utility model clamp device comprises sample holder device and anchor clamps 5, and said sample holder device comprises locking double-screw bolt 1, cramping body 2, fixture block 3 and pad 9; Said anchor clamps 5 and cramping body 2 clearance fit, cramping body 2 and locking double-screw bolt 1 are through being threaded, and the shape of said fixture block 3 cooperates with the female cone hole of cramping body 2, and said pad 9 is at fixture block 3 and lock between the double-screw bolt 1; One end of said locking double-screw bolt 1 is the outer-hexagonal head, and the other end is for being provided with externally threaded right cylinder, and the centre is the through hole of diameter greater than sample 4 largest cross-sectional sized.Said anchor clamps 5 are U-shaped spare, have elongated slot in the middle of the anchor clamps 5, and said elongated slot cooperates with the plane at cramping body 2 two ends, and when tightening locking double-screw bolt 1, anchor clamps 5 bear moment of torsion, and said anchor clamps 5 are fixed on the support 6 of testing machine.
Like Fig. 5, shown in Figure 6; Described cramping body 2 is a right cylinder, and the centre has through hole, and the through hole the first half in the middle of the cramping body 2 has internal thread; Cooperate with the external thread of said locking double-screw bolt 1; The latter half is a bellmouth, cooperates with said fixture block 3, and the aperture of the internal thread of said cramping body 2 is greater than the maximum gauge of cramping body 2 bellmouths; The two ends of cramping body 2 outer cylinder surfaces respectively are processed with the plane of two symmetries.
As shown in Figure 4, said fixture block 3 is made up of plural long strip shaped piece, and fixture block 3 outside surfaces that said long strip shaped piece constitutes are conical, and the shape and size of long strip shaped piece are confirmed according to the shape and size of the sample 4 of clamping.
Embodiment two:
As shown in Figure 9, on a 300kN gauge steel twisted wire relaxation testing machine, to install and use clamping device and anchor clamps, sample is the steel strand wires of diameter 12mm; Anchor clamps are installed in the anterior right side of the work top of machine, and near the operator position, the outer-hexagonal spanner that the arm lengths of exerting oneself is not less than 300mm applies moment of torsion; Realization applies prestress to sample, and the two ends of the elongated slot on the anchor clamps 5 cooperate with the plane at cramping body 2 two ends, and anchor clamps 5 are fixed on the appropriate location on the support 6 of testing machine through screw 7; Generally be fixed on the position of work top operation of the support 6 of testing machine; Apply the moment of torsion of T direction, when applying moment of torsion, the angular range that applies power F is-60 °≤θ≤+ 60 °; Be directed downwards, the instrument 8 that applies moment of torsion can be any spanner that can twist the outer-hexagonal head.
When clamping sample, when screwing locking double-screw bolt 1, the bottom of locking double-screw bolt 1 contacts with the end of fixture block 3 through pad 9; And promote fixture block 3 and axially move, because fixture block 3 moves in the internal conical surface of cramping body 2, make fixture block 3 shrink to the center; Thereby sample 4 is applied radially clamping force; Reach before carrying out tension test sample is applied prestressed purpose, pad 9 plays homogenizing, transmits moment of torsion, the effect that reduces friction; For different size, difform sample, rely on the shape and the specification that change fixture block 3 to adapt to, fixture block 3 is made up of the part of polylith strip, and the fixture block of clamping circular specimen generally can be made up of three block length bars; The fixture block of clamping square sample generally can be made up of four block length bars.
Claims (4)
1. a sample prestress clamp device is characterized in that, this device comprises sample holder device and anchor clamps (5), and said sample holder device comprises locking double-screw bolt (1), cramping body (2), fixture block (3) and pad (9); Said anchor clamps (5) and cramping body (2) clearance fit; Cramping body (2) with locking double-screw bolt (1) through being threaded; The shape of said fixture block (3) cooperates with the female cone hole of cramping body (2), and said pad (9) is positioned between fixture block (3) and the locking double-screw bolt (1); One end of said locking double-screw bolt (1) is the outer-hexagonal head, and the other end is for being provided with externally threaded right cylinder, and the centre is the through hole of diameter greater than sample (4) largest cross-sectional sized.
2. a kind of sample prestress clamp device according to claim 1 is characterized in that described cramping body (2) is a right cylinder; The centre has through hole; Through hole the first half in the middle of the cramping body (2) has internal thread, cooperates with the external thread of said locking double-screw bolt (1), and the latter half is a bellmouth; Cooperate with said fixture block (3), the aperture of the internal thread of said cramping body (2) is greater than the maximum gauge of cramping body (2) bellmouth; The two ends of cramping body (2) outer cylinder surface respectively are processed with the plane of two symmetries.
3. a kind of sample prestress clamp device according to claim 1 and 2 is characterized in that described anchor clamps (5) are U-shaped spare, has elongated slot in the middle of the anchor clamps (5), and said elongated slot cooperates with the plane at cramping body (2) two ends.
4. a kind of sample prestress clamp device according to claim 1 is characterized in that described fixture block (3) is made up of plural long strip shaped piece, and fixture block (3) outside surface that said long strip shaped piece constitutes is conical.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012202018167U CN202562808U (en) | 2012-05-07 | 2012-05-07 | Sample prestress clamping device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012202018167U CN202562808U (en) | 2012-05-07 | 2012-05-07 | Sample prestress clamping device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202562808U true CN202562808U (en) | 2012-11-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012202018167U Expired - Fee Related CN202562808U (en) | 2012-05-07 | 2012-05-07 | Sample prestress clamping device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202562808U (en) |
Cited By (23)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103149080A (en) * | 2013-03-06 | 2013-06-12 | 无锡安士达五金有限公司 | Rivet mandrel testing device |
| CN104034580A (en) * | 2014-06-24 | 2014-09-10 | 中国飞机强度研究所 | Axial breaking test system clamping device |
| CN104390850A (en) * | 2014-10-09 | 2015-03-04 | 深圳市瑞格尔仪器有限公司 | Clamp for fixing direct current submarine cable |
| CN104438909A (en) * | 2014-12-11 | 2015-03-25 | 中国航空工业标准件制造有限责任公司 | Automatic inner hexagonal hole cutting alignment clamp for bolts |
| CN104568576A (en) * | 2013-10-10 | 2015-04-29 | 贵州大学 | Clamping method for mechanical performance experiment of metal material |
| CN104697851A (en) * | 2015-01-29 | 2015-06-10 | 中国人民解放军第五七一九工厂 | Thread pre-tensioning clamp for thin sheet tensioning test article |
| CN104897461A (en) * | 2015-06-16 | 2015-09-09 | 南京理工大学 | Dynamic tension experiment fixture |
| CN105716941A (en) * | 2014-12-03 | 2016-06-29 | 上海金艺检测技术有限公司 | Special jig for triangular pin tensile test |
| CN105806702A (en) * | 2016-04-10 | 2016-07-27 | 济南天辰试验机制造有限公司 | Clamp used for horizontal relaxation testing machine of steel strands |
| CN105890979A (en) * | 2016-04-06 | 2016-08-24 | 吉林大学 | Pre-tightening type mechanical clamping mechanism for combined load material mechanical property testing |
| CN106013055A (en) * | 2016-07-19 | 2016-10-12 | 周兆弟 | Right-angle pile and fender pile structure |
| CN106013087A (en) * | 2016-07-19 | 2016-10-12 | 周兆弟 | Steel strand locking structure of prefabricated pile and using method for steel strand locking structure |
| CN106049460A (en) * | 2016-07-19 | 2016-10-26 | 周兆弟 | Precast pile capable of using steel strands for connection and connection method |
| CN106786276A (en) * | 2016-12-29 | 2017-05-31 | 国网浙江余姚市供电公司 | A kind of wire clamp |
| CN106885729A (en) * | 2017-04-05 | 2017-06-23 | 北京航空航天大学 | The high temperature push-pull fatigue test cramp and method of a kind of flat test piece |
| CN107247022A (en) * | 2017-06-30 | 2017-10-13 | 河南工程学院 | A kind of clamping device measured for photoelectric property |
| CN107366277A (en) * | 2016-05-13 | 2017-11-21 | 周兆弟 | A kind of post-stretching fender post and its moment connection method |
| CN107812846A (en) * | 2017-10-25 | 2018-03-20 | 中国航发动力股份有限公司 | A kind of positioning clamping device of arcuate thin-wall section |
| CN108844814A (en) * | 2018-08-22 | 2018-11-20 | 宁波大学 | A kind of braid material Hopkinson tension test clamp method |
| CN109115598A (en) * | 2018-10-12 | 2019-01-01 | 济南大学 | One kind is based on separation taper card slot type wirerope clamp system |
| CN105388062B (en) * | 2015-11-26 | 2019-03-01 | 中国航空工业集团公司北京航空材料研究院 | A kind of specimen holder of pull test tubing or bar |
| CN111855391A (en) * | 2020-07-07 | 2020-10-30 | 鞍钢股份有限公司 | High-temperature stretching clamp for thermal simulation test machine and design and use method thereof |
| CN113514354A (en) * | 2021-06-03 | 2021-10-19 | 中车青岛四方机车车辆股份有限公司 | Device and method for measuring fretting fatigue strength of press-fitting structure |
-
2012
- 2012-05-07 CN CN2012202018167U patent/CN202562808U/en not_active Expired - Fee Related
Cited By (29)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103149080B (en) * | 2013-03-06 | 2014-10-29 | 无锡安士达五金有限公司 | Rivet mandrel testing device |
| CN103149080A (en) * | 2013-03-06 | 2013-06-12 | 无锡安士达五金有限公司 | Rivet mandrel testing device |
| CN104568576A (en) * | 2013-10-10 | 2015-04-29 | 贵州大学 | Clamping method for mechanical performance experiment of metal material |
| CN104034580A (en) * | 2014-06-24 | 2014-09-10 | 中国飞机强度研究所 | Axial breaking test system clamping device |
| CN104390850A (en) * | 2014-10-09 | 2015-03-04 | 深圳市瑞格尔仪器有限公司 | Clamp for fixing direct current submarine cable |
| CN105716941A (en) * | 2014-12-03 | 2016-06-29 | 上海金艺检测技术有限公司 | Special jig for triangular pin tensile test |
| CN104438909A (en) * | 2014-12-11 | 2015-03-25 | 中国航空工业标准件制造有限责任公司 | Automatic inner hexagonal hole cutting alignment clamp for bolts |
| CN104697851A (en) * | 2015-01-29 | 2015-06-10 | 中国人民解放军第五七一九工厂 | Thread pre-tensioning clamp for thin sheet tensioning test article |
| CN104897461A (en) * | 2015-06-16 | 2015-09-09 | 南京理工大学 | Dynamic tension experiment fixture |
| CN105388062B (en) * | 2015-11-26 | 2019-03-01 | 中国航空工业集团公司北京航空材料研究院 | A kind of specimen holder of pull test tubing or bar |
| CN105890979A (en) * | 2016-04-06 | 2016-08-24 | 吉林大学 | Pre-tightening type mechanical clamping mechanism for combined load material mechanical property testing |
| CN105890979B (en) * | 2016-04-06 | 2018-07-06 | 吉林大学 | For the prefastening machinery clamping mechanism of combined load material mechanical performance test |
| CN105806702A (en) * | 2016-04-10 | 2016-07-27 | 济南天辰试验机制造有限公司 | Clamp used for horizontal relaxation testing machine of steel strands |
| CN105806702B (en) * | 2016-04-10 | 2018-09-18 | 济南天辰试验机制造有限公司 | For the fixture on horizontal the steel strand relaxation test machine |
| CN107366277A (en) * | 2016-05-13 | 2017-11-21 | 周兆弟 | A kind of post-stretching fender post and its moment connection method |
| CN106013055A (en) * | 2016-07-19 | 2016-10-12 | 周兆弟 | Right-angle pile and fender pile structure |
| CN106013087A (en) * | 2016-07-19 | 2016-10-12 | 周兆弟 | Steel strand locking structure of prefabricated pile and using method for steel strand locking structure |
| CN106049460A (en) * | 2016-07-19 | 2016-10-26 | 周兆弟 | Precast pile capable of using steel strands for connection and connection method |
| CN106013087B (en) * | 2016-07-19 | 2019-05-21 | 周兆弟 | The steel strand wires locking mechanism and application method of prefabricated pile |
| CN106786276A (en) * | 2016-12-29 | 2017-05-31 | 国网浙江余姚市供电公司 | A kind of wire clamp |
| CN106885729A (en) * | 2017-04-05 | 2017-06-23 | 北京航空航天大学 | The high temperature push-pull fatigue test cramp and method of a kind of flat test piece |
| CN107247022A (en) * | 2017-06-30 | 2017-10-13 | 河南工程学院 | A kind of clamping device measured for photoelectric property |
| CN107812846A (en) * | 2017-10-25 | 2018-03-20 | 中国航发动力股份有限公司 | A kind of positioning clamping device of arcuate thin-wall section |
| CN108844814A (en) * | 2018-08-22 | 2018-11-20 | 宁波大学 | A kind of braid material Hopkinson tension test clamp method |
| CN109115598A (en) * | 2018-10-12 | 2019-01-01 | 济南大学 | One kind is based on separation taper card slot type wirerope clamp system |
| CN111855391A (en) * | 2020-07-07 | 2020-10-30 | 鞍钢股份有限公司 | High-temperature stretching clamp for thermal simulation test machine and design and use method thereof |
| CN111855391B (en) * | 2020-07-07 | 2023-08-18 | 鞍钢股份有限公司 | High-temperature stretching clamp for thermal simulation testing machine and design and use method thereof |
| CN113514354A (en) * | 2021-06-03 | 2021-10-19 | 中车青岛四方机车车辆股份有限公司 | Device and method for measuring fretting fatigue strength of press-fitting structure |
| CN113514354B (en) * | 2021-06-03 | 2024-08-23 | 中车青岛四方机车车辆股份有限公司 | Device and method for measuring micro-motion fatigue strength of press-fit structure |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121128 Termination date: 20140507 |