CN103424310B - A kind of method testing test piece extensibility and clamping device - Google Patents
A kind of method testing test piece extensibility and clamping device Download PDFInfo
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- CN103424310B CN103424310B CN201310366674.9A CN201310366674A CN103424310B CN 103424310 B CN103424310 B CN 103424310B CN 201310366674 A CN201310366674 A CN 201310366674A CN 103424310 B CN103424310 B CN 103424310B
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- test piece
- lower plate
- puller system
- clamping device
- test specimen
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Abstract
The present invention relates to a kind of method testing test piece tensile elongation and clamping device.By round metal bars by test specimen two ends press-in clamping board slot, tighten holding screw, upper and lower grip block is clamped round metal bars, thus clamps test piece two ends；Above-mentioned clamping device is applied to clamp test piece two ends, when measuring the extended length of test piece at low temperatures, correct position in test piece clamps test piece with two little retaining wedges, a marline is had to be connected between little retaining wedge and lower plate, lower plate Shang Youyige mechanism guarantees that marline can pull out smoothly and regain, start puller system, test piece is broken, by reading the stretching distance data of puller system record, craft measures the length of the marline between little retaining wedge and lower plate, by calculating, the percentage elongation of test piece just can be drawn the most accurately.
Description
Technical field
The present invention relates to a kind of method testing test piece extensibility and clamping device, the method of a kind of ultralow temperature test test piece extensibility and clamping device, can use when low temperature and room temperature tensile testing machine are tested, be mainly used in ultralow temperature tensile testing machine and carry out use during cryogenic testing.
Technical background
When carrying out test piece room temperature tension test, by fixture, the two ends of dumbbell shaped test piece are clamped.The position two ends clamper selected in test piece is clamped, changed by the distance between the clamper of two ends, the percentage elongation of the record test piece that can will be apparent within the computer of equipment shows dialog boxes, at present, disclosed existing clamping device, lever principle is mostly used test piece to be placed on lower plate, the mode compressing test piece with the train wheel bridge of lamellar clamps test piece, with the contact area of test piece is less, upper lower plate is the biggest to the thrust of test piece, test piece is compressed position and constitutes damage, easily test piece is broken in the place compressed when stretching, particularly under the temperature low temperature state less than-40 DEG C, when the toughness of test piece substantially reduces, owing to the effect of pressure is easy to break.When test temperature is higher than-40 DEG C, typically using two fluorescent material round dots on location point selected in test piece, during stretching, the specific device of puller system is by two fluorescent material points of sensing, records the distance between two fluorescent material points, thus draws the percentage elongation of test piece.When test temperature is less than-40 DEG C, dot fluorescent powder easily comes off in test piece drawing process, it is impossible to labelling, and outside designated length, test piece also has certain elongation to measure simultaneously.
Summary of the invention
Patent of the present invention the most well solves above-mentioned technical problem, it is provided that a kind of novel clamping device clamping test piece, adds rope hauling device for measuring the measurement of extensibility under low temperature state between clamping device and puller system simultaneously:
A kind of puller system tensile test specimen clamping device, described fixture includes pole, train wheel bridge and lower plate and trip bolt, described upper and lower clamping plate one end connects, and the two opposite face has semicircular groove, described pole is placed between train wheel bridge and lower plate in groove, fastening upper and lower clamping plate by trip bolt, the train wheel bridge of fixture can overturn in the range of 90 ° around hinge.
Further, be provided with can be from lower plate indentation and the rope of pull-out for described lower plate.
Described pole can be the most stressed in the case of do not allow deformable material, surface have embossing or wrap up soft latex film with the frictional force that contacts with test piece of increase.
A kind of test the method that percentage elongation is drawn in test piece, described fixture fixes test piece, fixture is connected on puller system hook, in the middle of test piece, choose segment length two ends accompany little retaining wedge, being provided with telescopic rope between little retaining wedge and lower plate, during puller system tensile test specimen, little retaining wedge moves together with test piece, described rope is drawn out, after test piece is broken, puller system quits work, and measures rope pull-out length, display length in conjunction with puller system obtains tensile elongation, calculates the extensibility of test piece.
Traditional installation way broken through by the clamping of test piece of the present invention, has clamping quickly, simply, and clamping is firm, protects test piece simultaneously, improves the feature of experiment success rate.
Solve the accurate measurement problem of test piece tensile elongation under low temperature state, thus calculate the percentage elongation of test piece accurately.
Accompanying drawing illustrates:
The front view during test of Fig. 1 puller system tensile test specimen clamping device
The top view during test of Fig. 2 puller system tensile test specimen clamping device
1, train wheel bridge 2, little retaining wedge 3, test piece 4, trip bolt 5, rope 6, pole 7, lower plate 8, puller system hook.
Specific embodiment
A kind of puller system tensile test specimen clamping device, fixture includes pole 6, train wheel bridge 1 and lower plate 7, upper and lower clamping plate 1, semicircular groove is had on 7, pole 6 is placed between train wheel bridge 1 and lower plate 7, being fastened by trip bolt 4, fixture chooses stainless steel material, the frictional force that the latex film that described pole parcel is soft contacts with test piece with increase.
During test, described fixture fixes test piece 3, fixture is connected on puller system hook 8, in the middle of test piece 3, choose segment length two ends accompany little retaining wedge 2, be provided with between little retaining wedge 2 and lower plate 7 can indentation and the rope 5 of pull-out, during puller system tensile test specimen 3, little retaining wedge 2 moves together with test piece 3, described rope 5 is drawn out, after test piece 3 is broken, puller system quits work, and measures rope pull-out length, display length in conjunction with puller system obtains tensile elongation, calculates the extensibility of test piece.
Claims (5)
1. a puller system tensile test specimen clamping device, it is characterized in that: described fixture includes pole (6), train wheel bridge (1) and lower plate (7) and trip bolt (4), described train wheel bridge (1), lower plate (7) one end connect, and the two opposite face has semicircular groove, described pole (6) is placed between train wheel bridge (1) and lower plate (7) in groove, by trip bolt (4) fastening train wheel bridge (1), lower plate (7), described lower plate (7) is provided with can be from the rope (5) of lower plate (7) indentation and pull-out.
A kind of puller system tensile test specimen clamping device the most according to claim 1, it is characterised in that: the train wheel bridge (1) of fixture can overturn in the range of 90 ° around hinge.
A kind of puller system tensile test specimen clamping device the most according to claim 1, it is characterised in that: described pole (6) surface has embossing.
A kind of puller system tensile test specimen clamping device the most according to claim 1, it is characterised in that: described pole (6) is upper wraps up soft latex film.
5. the method using claim 1 puller system tensile test specimen clamping device test test piece percentage elongation, it is characterized in that: test piece (3) two ends are clamped with described fixture respectively, the two ends of fixture connect puller system hook (8) tensile test specimen (3), in the middle of the test piece (3) fixed, choose segment length two ends accompany little retaining wedge (2), telescopic rope (5) it is provided with between little retaining wedge (2) and lower plate (7), puller system tensile test specimen (3), little retaining wedge (2) moves together with test piece, described rope (5) is drawn out, after test piece is broken, puller system quits work, measure rope pull-out length, display length in conjunction with puller system obtains tensile elongation, calculate the extensibility of test piece.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310366674.9A CN103424310B (en) | 2013-08-21 | 2013-08-21 | A kind of method testing test piece extensibility and clamping device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310366674.9A CN103424310B (en) | 2013-08-21 | 2013-08-21 | A kind of method testing test piece extensibility and clamping device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103424310A CN103424310A (en) | 2013-12-04 |
| CN103424310B true CN103424310B (en) | 2016-08-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310366674.9A Expired - Fee Related CN103424310B (en) | 2013-08-21 | 2013-08-21 | A kind of method testing test piece extensibility and clamping device |
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| CN (1) | CN103424310B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104198253A (en) * | 2014-09-15 | 2014-12-10 | 英业达科技有限公司 | Test piece and extension test method utilizing same |
| CN105486537A (en) * | 2016-02-01 | 2016-04-13 | 复旦大学附属中山医院 | Tissue slice tool rest |
| CN108287107B (en) * | 2018-03-20 | 2020-10-16 | 国网山东省电力公司济宁供电公司 | Thermal extension test support and using method thereof |
| CN112129624A (en) * | 2020-10-23 | 2020-12-25 | 英利能源（中国）有限公司 | Test method for tensile property of back plate |
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| US5581040A (en) * | 1995-11-01 | 1996-12-03 | Lin; Wei-Hwang | Multi-functional hydraulic grip |
| CN201277929Y (en) * | 2008-08-18 | 2009-07-22 | 武汉钢铁(集团)公司 | Circular stair sample drawing clamp |
| CN201607366U (en) * | 2010-02-04 | 2010-10-13 | 西北工业大学 | Tensile test fixture |
| CN201740698U (en) * | 2010-07-01 | 2011-02-09 | 诸城市大业金属制品有限责任公司 | Clamp of tension machine |
| JP2012149943A (en) * | 2011-01-18 | 2012-08-09 | Shimadzu Corp | Material tester |
| CN103163018A (en) * | 2013-02-01 | 2013-06-19 | 西北工业大学 | Fixture for thin-walled tube high-temperature tension test |
| CN103163019A (en) * | 2013-03-04 | 2013-06-19 | 江苏大学 | Tensile test special fixture used for sheet metal or metal foil and using method |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102680320B (en) * | 2012-06-08 | 2013-12-04 | 哈尔滨工业大学 | Fixture for testing tensile properties of ultrathin flexible membrane materials |
| CN102879267B (en) * | 2012-09-18 | 2014-07-30 | 华南理工大学 | Unilateral plastic film stretching test method and device based on constant strain rate |
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2013
- 2013-08-21 CN CN201310366674.9A patent/CN103424310B/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5581040A (en) * | 1995-11-01 | 1996-12-03 | Lin; Wei-Hwang | Multi-functional hydraulic grip |
| CN201277929Y (en) * | 2008-08-18 | 2009-07-22 | 武汉钢铁(集团)公司 | Circular stair sample drawing clamp |
| CN201607366U (en) * | 2010-02-04 | 2010-10-13 | 西北工业大学 | Tensile test fixture |
| CN201740698U (en) * | 2010-07-01 | 2011-02-09 | 诸城市大业金属制品有限责任公司 | Clamp of tension machine |
| JP2012149943A (en) * | 2011-01-18 | 2012-08-09 | Shimadzu Corp | Material tester |
| CN103163018A (en) * | 2013-02-01 | 2013-06-19 | 西北工业大学 | Fixture for thin-walled tube high-temperature tension test |
| CN103163019A (en) * | 2013-03-04 | 2013-06-19 | 江苏大学 | Tensile test special fixture used for sheet metal or metal foil and using method |
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| CN103424310A (en) | 2013-12-04 |
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Address after: Xinhua Road 412003 Hunan province Zhuzhou Hetang District No. 818 Applicant after: Rubber studying and designing institute, China Chemical Industry Zhuzhou company limited Address before: Xinhua Road 412003 Hunan province Zhuzhou Hetang District No. 818 Applicant before: Zhuzhou Research & Design Institute, Chemchina Rubber Corp. |
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Free format text: CORRECT: APPLICANT; FROM: CHINA CHEMICAL INDUSTRY RUBBER ZHUZHOU RESEARCH AND DESIGN INSTITUTE TO: CHINA CHEMICAL INDUSTRY ZHUZHOU RUBBER RESEARCH AND DESIGN INSTITUTE CO., LTD. |
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