CN102607944A - Gripper for tension test - Google Patents
Gripper for tension test Download PDFInfo
- Publication number
- CN102607944A CN102607944A CN2012101116580A CN201210111658A CN102607944A CN 102607944 A CN102607944 A CN 102607944A CN 2012101116580 A CN2012101116580 A CN 2012101116580A CN 201210111658 A CN201210111658 A CN 201210111658A CN 102607944 A CN102607944 A CN 102607944A
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- clamper
- plane
- arc plate
- sample
- bare terminal
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Abstract
The invention discloses a gripper for a tension test, aiming at solving the problem that a gripper is easy to slip and hard to grip a test sample while measuring the tension performance of a material in a low-temperature environment. The gripper disclosed by the invention comprises two completely same gripping ends which are oppositely separated, wherein the gripping ends are stepped cylinders, the end part of one of the gripping ends which is connected with a tensile testing machine is provided with a through hole, and the end part of the other end is provided with a plane in the radial direction; the cross sections of the gripping ends are semicircular; a spring self-locked type eccentric wheel is disposed on the plane, and the spring self-locked type eccentric wheel is fixedly installed on the plane via a support; and a pair of arc plates is further fixedly disposed on the plane. The gripper for the tension test disclosed by the invention is mainly used for testing the tension performances of a high polymer material and a composite material.
Description
Technical field
The present invention relates to a kind of tension test and use clamper, more particularly, the present invention relates to a kind of tension test that is used for the performance test of nonmetallic materials tensile stress-strain and use clamper.
Background technology
Along with various nonmetallic materials in extensive applications such as Aeronautics and Astronautics, weapons, communications and transportation; Test and research as the stress-strain property of material foundation performance just seem of crucial importance, and one of important tests technological means of this performance is studied in tension test just.The test of whole material mechanical performance is carried out being furnished with on the electronic tension tester of insulation can, and data are connected on the computing machine control through high precision, highly sensitive sensor and gather.Tension test then is one of the critical component of measuring the tensile mechanical properties of material with clamper.In test process, the two ends of sample are separately fixed on the bare terminal end of clamper, and clamper is connected with cupping machine, and testing machine passes through the clamper tensile sample, mechanical properties such as the pulling strengrth of acquisition sample, elastic modulus, extensibility.Shape, the size of sample are carried out according to respective standard, and be as shown in Figure 1.The sample two ends must be dumbbell shape, and sample Validity Test section is straight-line segment part between wherein.
Used tension test both at home and abroad is that testing machine manufacturer provides with clamper at present, and this tension test is generally the automatic locking clip of eccentric wheel type spring with clamper and holds device.This clamper mainly is through automatically tight lock power of spring and the friction force that eccentric wheel surface sawtooth produces the dumbbell shape end of sample to be stepped up, effective clamping of realization sample, and then be connected with cupping machine and carry out tension test.
The deficiency of this clamper is: when under low temperature environment, carrying out the material extending performance measurement, be prone between clamper and the sample skid, cause being difficult to the clamping sample.
Summary of the invention
Technical matters to be solved by this invention is to overcome the deficiency and the defective of prior art, provides a kind of reliably tension test of clamping sample to use clamper.When adopting this clamper to carry out low temperature environment stretched performance test, avoid skidding between clamper and the sample, solved the problem that sample is difficult to clamping.
In order to solve the problems of the technologies described above; The present invention provides a kind of tension test to use clamper, and this clamper comprises two identical, separation bare terminal ends in opposite directions, and said bare terminal end is the step circle cylinder; Its end that links to each other with tension tester is that the end has through hole; The end of the other end is having a plane in the radial direction, and its xsect is semicircle, and an automatic locking type eccentric wheel of spring is arranged on the said plane; The automatic locking type eccentric wheel of this spring also fixedly installs a pair of arc plate through the support fixed installation in the plane on said plane.
One side of said arc plate is concordant away from puller system one end margin with bare terminal end, and its circular arc angle is 40 °～90 °, and transition limit, the outside E radius R of arc radius R and dumbbell shaped standard sample is corresponding, and the thickness of arc plate is slightly larger than dumbbell shape standard sample thickness.
Said a pair of arc plate is fixedly mounted on the plane of said bare terminal end with circular arc in opposite directions, and this narrow C width to minimum spacing between the arc plate and dumbbell shape standard sample is corresponding.
The distance away from the edge of puller system one end of eccentric axis of the automatic locking type of said spring and bare terminal end is corresponding with the dumb-bell shape partial-length of sample.
Said arc plate is installed on the bare terminal end through welding, riveted joint or bolt.
Tension test of the present invention is compared with domestic and international employed clamper with clamper; Owing on bare terminal end, be provided with a pair of arc plate; The width of the narrow of minimum spacing between the arc plate and dumbbell shape standard sample is corresponding, and when sample was tested, tested sample was under arc plate on the clamper and the common clamping of the automatic locking type eccentric wheel of spring; When the automatic locking type eccentric wheel of the spring clamping sample that has overcome domestic and international employed clamper is tested under low temperature environment; Skid between the automatic locking type eccentric wheel of sample and spring, cause test sample to come off, can't test; When also having overcome normal temperature, hot environment test in addition because sample deformation is big from the clamping of the automatic locking type eccentric wheel of spring slippage, can't test; Tension test of the present invention has improved the holding force of clamper to sample with clamper.
Description of drawings
Fig. 1 is the sample synoptic diagram of GB/T528 regulation.
Fig. 2 is the front elevation of tension test of the present invention with a bare terminal end embodiment of clamper.
Fig. 3 is the eccentric left view of the automatic locking type of spring.
Fig. 4 is the front elevation of the automatic locking type eccentric wheel type of spring clamper.
Embodiment
Below in conjunction with accompanying drawing the present invention is done further explain.
With reference to accompanying drawing 1, in the material extending performance test, sample be shaped as GB/T528 specified standard dumbbell shape.The dumbbell shape standard sample comprises two end K, four outer transition limit E and a narrow parallel portion C.
With reference to accompanying drawing 2,3 embodiment of the present invention.The bare terminal end of the used clamper of tension test can be processed into the step circle cylinder, and the less end of its diameter is the right cylinder that the end has through hole 7, and the employing milling machine of the big other end of this diameter processes plane 2, and its xsect is semicircle; Mounting bracket 3 on this plane, through the automatic locking type eccentric wheel 6 of support 3 mounting spring.Automatic locking type eccentric wheel 6 processing of spring can adopt milling machine by circular wheel of corresponding section bar steel earlier; Utilizing the roll-in technology that the circular wheel circumferential surface is carried out embossing again handles; Obtain serrated-surface 6.2; Adopt drilling machine on this side, circular wheel both sides, to depart from home position and hole 6.1 respectively, the automatic locking type eccentric wheel 6 of spring is fixedly connected on the support 3 on the plane 2 through shaft coupling 4, hole 6.1; One spring 4 is installed between the automatic locking type eccentric wheel 6 of support 3 and spring, is realized the tight automatically lock of the automatic locking type eccentric wheel 6 of spring through recoil of spring power.The distance away from the edge of puller system one end of eccentric axis of the automatic locking type of said spring and bare terminal end is corresponding with the dumb-bell shape partial-length of sample.
Be a pair of arc plate 1 of fixed installation on the plane of semicircle cylinder one end at said xsect, this arc plate 1 adopts line cutting technology to be processed by the steel plate of respective thickness, through welding, riveted joint or bolt with the fixed installation of circular arc relative mode this to the arc plate.Said arc plate 1 is a right-angle side arc plate, and this is concordant away from tension tester one end margin to a right-angle side of arc plate 1 and bare terminal end, and its circular arc angle is 40 °～90 °, and transition limit, the outside E radius R of arc radius R and dumbbell shaped standard sample is corresponding.This narrow C width to minimum spacing between the arc plate and dumbbell shape standard sample is corresponding.The thickness of arc plate 1 is slightly larger than dumbbell shape standard sample thickness.Under the acting in conjunction of arc plate 1 and the automatic locking type eccentric wheel 6 of spring, the effectively reliable clamping of sample quilt when low-temperature test.Bare terminal end one end is provided with through hole 7, adopts pin to be fixedly connected with tension tester.
Use of the present invention
Adopt tension test of the present invention to use clamper that silica modified ethylene-propylene-diene rubber based composites sample is carried out low-temperature test and be example, test the tensile property of this sample when low temperature (40 ℃).Tension tester adopts instron4505 static materials tension tester, and the sample of above-mentioned material is put into airtight test cool-bag, treat that temperature reaches probe temperature-40 ℃ after, constant insulation 30min measured sample after the time.
During the clamping sample; The end of sample is inserted into below the automatic locking type eccentric wheel 6 of spring; After the K position of the dumbbell shape of this section portion embeds between the arc plate 1; Stir the driving lever 6.3 on the automatic locking type eccentric wheel 6 of spring, the automatic locking type eccentric wheel 6 of spring is rotated, the automatic locking type eccentric wheel 6 of spring receives the tight automatically lock of spring 4 effects.
Tension test of the present invention well grasps sample with clamper in test process; Clamper and sample skidding do not take place, and to the work shoulder not damaged of sample, fracture location is all in the gauge length scope of standard code; Distortion is even, and the repeatability of a plurality of same sample test datas better.
Clamper of the present invention not only can be applicable to-40 ℃ of temperature; And can be used for the stretching mechanical test of-40 ℃～50 ℃ of temperature ranges, can accurately, reliably, stably carry out pulling strengrth, the elastic modulus of macromolecule such as rubber, plastics and compound substance thereof, the test of length growth rate.The result proves that this clamper retaining part is reasonable in design, and clamper itself does not have influence basically to measuring.
Claims (5)
1. clamper is used in a tension test; This clamper comprises two identical, separation bare terminal ends in opposite directions; Said bare terminal end is the step circle cylinder, and its end that links to each other with tension tester is that the end has through hole, and the other end is having a plane in the radial direction; Its xsect is semicircle; An automatic locking type eccentric wheel of spring is arranged on the said plane, and the automatic locking type eccentric wheel of this spring is characterized in that: on said plane, also fixedly install a pair of arc plate through the support fixed installation in the plane.
2. clamper is used in tension test according to claim 1; It is characterized in that; One side of said arc plate is concordant away from puller system one end margin with bare terminal end; Its circle angle is 40 °～90 °, and transition limit, the outside E radius R of arc radius R and dumbbell shaped standard sample is corresponding, and the thickness of arc plate is slightly larger than dumbbell shape standard sample thickness.
3. clamper is used in tension test according to claim 1 and 2; It is characterized in that; Said a pair of arc plate is fixedly mounted on the plane of said bare terminal end with circular arc in opposite directions, and this narrow C width to minimum spacing between the arc plate and dumbbell shape standard sample is corresponding.
4. clamper is used in tension test according to claim 1 and 2, it is characterized in that, the distance away from puller system one end margin of eccentric axis of the automatic locking type of said spring and bare terminal end is corresponding with the dumb-bell shape partial-length of sample.
5. stretching clamper according to claim 1 and 2 is characterized in that, said arc plate is installed on the bare terminal end through welding, riveted joint or bolt.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101116580A CN102607944A (en) | 2012-04-17 | 2012-04-17 | Gripper for tension test |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101116580A CN102607944A (en) | 2012-04-17 | 2012-04-17 | Gripper for tension test |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102607944A true CN102607944A (en) | 2012-07-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012101116580A Pending CN102607944A (en) | 2012-04-17 | 2012-04-17 | Gripper for tension test |
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| Country | Link |
|---|---|
| CN (1) | CN102607944A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103698172A (en) * | 2013-11-12 | 2014-04-02 | 西安近代化学研究所 | Processing apparatus of solid propellant tension specimen |
| CN105571941A (en) * | 2014-10-30 | 2016-05-11 | 深圳市信立泰生物医疗工程有限公司 | Mold and method for ring hoop tension tests of small polymer pipes |
| CN112730090A (en) * | 2020-11-30 | 2021-04-30 | 中国原子能科学研究院 | Metal material high-temperature tensile elongation marking test device and method |
| CN114965027A (en) * | 2022-07-13 | 2022-08-30 | 西南石油大学 | Tensile fixture of biaxial tensile testing machine |
| CN115184164A (en) * | 2022-09-13 | 2022-10-14 | 江苏高达新材料有限公司 | Tensile elasticity testing arrangement of braid over braid based on hydraulic drive |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10132719A (en) * | 1996-10-31 | 1998-05-22 | Shimadzu Corp | Material testing machine |
| CN2669172Y (en) * | 2003-11-18 | 2005-01-05 | 中国科学院理化技术研究所 | Tensile test clamp |
| CN201803899U (en) * | 2010-09-07 | 2011-04-20 | 鞍钢股份有限公司 | Clamp for high-temperature tensile test of thin plate |
-
2012
- 2012-04-17 CN CN2012101116580A patent/CN102607944A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10132719A (en) * | 1996-10-31 | 1998-05-22 | Shimadzu Corp | Material testing machine |
| CN2669172Y (en) * | 2003-11-18 | 2005-01-05 | 中国科学院理化技术研究所 | Tensile test clamp |
| CN201803899U (en) * | 2010-09-07 | 2011-04-20 | 鞍钢股份有限公司 | Clamp for high-temperature tensile test of thin plate |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103698172A (en) * | 2013-11-12 | 2014-04-02 | 西安近代化学研究所 | Processing apparatus of solid propellant tension specimen |
| CN103698172B (en) * | 2013-11-12 | 2015-12-09 | 西安近代化学研究所 | A kind of processing unit (plant) of solid propellant tensile sample |
| CN105571941A (en) * | 2014-10-30 | 2016-05-11 | 深圳市信立泰生物医疗工程有限公司 | Mold and method for ring hoop tension tests of small polymer pipes |
| CN105571941B (en) * | 2014-10-30 | 2023-08-29 | 深圳信立泰医疗器械股份有限公司 | Die for circumferential tensile test of polymer small pipe and test method thereof |
| CN112730090A (en) * | 2020-11-30 | 2021-04-30 | 中国原子能科学研究院 | Metal material high-temperature tensile elongation marking test device and method |
| CN114965027A (en) * | 2022-07-13 | 2022-08-30 | 西南石油大学 | Tensile fixture of biaxial tensile testing machine |
| CN115184164A (en) * | 2022-09-13 | 2022-10-14 | 江苏高达新材料有限公司 | Tensile elasticity testing arrangement of braid over braid based on hydraulic drive |
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Application publication date: 20120725 |