CN104535414B - A kind of shearing test clamp - Google Patents

A kind of shearing test clamp Download PDF

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Publication number
CN104535414B
CN104535414B CN201410784853.9A CN201410784853A CN104535414B CN 104535414 B CN104535414 B CN 104535414B CN 201410784853 A CN201410784853 A CN 201410784853A CN 104535414 B CN104535414 B CN 104535414B
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China
Prior art keywords
sample
sliding block
shearing
locating rod
shaped
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CN104535414A (en
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厉蕾
郭世毅
陈洁
聂磊
丁宇婷
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Beijing Aviation Materials Research Institute Co ltd
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BEIJING INSTITUTE OF AERONAUTICAL MATERIALS CHINA AVIATION INDUSTRY GROUP Corp
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Abstract

The present invention is a kind of shearing test clamp, and the shear strength test that the shearing test clamp can simultaneously meet " Z-type " and " T-shaped " two types sample is used;Flexible modulation using sliding block and the pad from different-thickness, can make fixture application in the sample of different-thickness, increase the versatility of sample;Meanwhile, force application spring is capable of the stress of adjusting sample clamp position with the addition of positioning sliding block, realizes the resilient clamp of sample, it is ensured that the advantages of sample does not slide in test process.

Description

A kind of shearing test clamp
Technical field
The present invention is a kind of shearing test clamp, is related to material shear strength detection technique field, is that one kind is used for difference Thickness it is T-shaped " shearing sample and " Z-type " and " T-shaped " sample compression shear test fixture.
Background technology
Using the interlaminar shear strength of universal testing machine test material (such as fibre reinforced plastics, lucite), and When sheet material is glued the adhesion strength in face, generally using " Z-type " and it is " T-shaped " shear sample, it is complex-shaped, tested due to sample Material thickness many sizes, general shearing test clamp is only capable of testing the sample of single shape and thickness, it is difficult to Meet the requirement of sample form change.In addition, using conventional brace sample generally by simply breasting during shearing test Or it is fixed, easily produce and rock, non-pure shear destruction is likely to result in, influence test result accuracy.
The content of the invention
The present invention is just being directed to not enough present in above-mentioned existing apparatus and is designing and provide a kind of shearing test clamp, its Purpose is the test request for adapting to different-thickness " Z-type " shearing sample and " T-shaped " shearing sample simultaneously.
The purpose of the present invention is achieved through the following technical solutions:
This kind of shearing test clamp, it is characterised in that:The fixture includes a pedestal platform (2), at the middle part of pedestal platform (2) The cavity (13) of indent is machined with, two sliding block (5), the positioning sliding blocks for being used to clamp sample are placed in the bottom of the cavity (13) (7), sliding block (5), positioning sliding block (7) are promoted by the first locating rod (4), the second locating rod (6) respectively, the first locating rod (4), the second locating rod (6) is each passed through the hole (15) on (13) two end faces (14) of cavity, and the top of sliding block (5) is provided with The fixed block (3) being fixedly connected with pedestal platform (2), the lower surface of fixed block (3) fits to limit with the upper surface of sliding block (5) Sliding block (5) vertically displacement, the vertical direction is sample Impact direction at the trial, the two of positioning sliding block (7) Side is provided with projection (17), and two projections (17) are inlaid in the chute (18) on (2) two side walls (16) of pedestal platform Nei respectively, should Chute (18) is in same level limiting positioning sliding block (7) position in sample holder side's upward sliding and vertically Move;
" Z-type " shearing sample (1) mounting means be:
The outer surface of fixed block (3) is fitted with the right flank of the right upper arm (19) of " Z-type " shearing sample (1), sliding block (5) Top sheared by the locating rod of precession first (4) and " Z-type " sample (1) right upper arm (19) lower surface and lower-left arm (20) Right flank laminating, the lower-left arm of sample (1) is sheared at the top of positioning sliding block (7) by the locating rod of precession second (6) with " Z-type " (20) left surface laminating, between the left surface of the right upper arm (19) that the top of positioning sliding block (7) and " Z-type " shear sample (1) Setting-in pad (11);
It is " T-shaped " shearing sample (12) mounting means be:
The outer surface of fixed block (3) is fitted with the preceding surface of the boss (21) of " T-shaped " shearing sample (12), sliding block (5) The top lower surface and base plate (22) that pass through the locating rod of precession first (4) and the boss (21) of " T-shaped " shearing sample (12) Upper surface is fitted, and the top of positioning sliding block (7) is by the locating rod of precession second (6) and " T-shaped " base plate for shearing sample (12) (22) lower surface laminating, pad (11), the pad are set on the upper surface of the boss (21) of " T-shaped " shearing sample (12) (11) it is installed between the upper surface of the base plate (22) of the outer surface of fixed block (3) and " T-shaped " shearing sample (12).
Spring (8) of the suit in cavity (13) in the second locating rod (6), one end and the positioning of the spring (8) are slided The bottom of block (7) offsets, the other end by the hole gasket (9) and adjusting nut (10) that are sleeved in the second locating rod (6) with The end face (14) of pedestal platform (2) offsets.
Above-mentioned " Z-type " is sheared in the mounting means of sample (1) and " T-shaped " shearing sample (12), the outer surface of fixed block (3) Should be consistent with the shear direction during shearing test, fixed with the shear direction for ensureing sample during shearing test.In addition, The bottom for shearing sample should leave gap as viscous shear space between the bottom of the cavity (13) of pedestal platform (2).
Compared with prior art, the beneficial effects of the invention are as follows:The shearing test clamp can simultaneously meet " Z-type " and " T The shear strength test of type " two types sample is used;Flexible modulation using sliding block and the pad from different-thickness, can Make fixture application in the sample of different-thickness, increase the versatility of sample;Meanwhile, the addition energy of force application spring and positioning sliding block The stress of enough adjusting sample clamp positions, realizes the resilient clamp of sample, it is ensured that sliding etc. does not occur is excellent for sample in test process Point.
Brief description of the drawings
Fig. 1 is the structural representation that shearing test clamp of the invention clamping " Z-type " shears sample
Fig. 2 is the structural representation of " T-shaped " the shearing sample of shearing test clamp of the invention clamping
Fig. 3 is the dimensional structure diagram of pedestal platform in shearing test clamp of the invention
Fig. 4 is the schematic shapes that " Z-type " that the present invention is applicable shears sample
Fig. 5 is the schematic shapes of " T-shaped " the shearing sample that the present invention is applicable
Specific embodiment
Technical solution of the present invention is further described below with reference to drawings and Examples:
Referring to shown in accompanying drawing 1~5, this kind of shearing test clamp, it is characterised in that:The fixture includes a pedestal platform 2, The middle part of pedestal platform 2 is machined with the cavity 13 of indent, the bottom of the cavity 13 place two be used to clamping the sliding block 5 of sample, Positioning sliding block 7, sliding block 5, positioning sliding block 7 are promoted by the first locating rod 4, the second locating rod 6 respectively, the first locating rod 4, the Two locating rods 6 are each passed through the hole 15 on 13 two end faces 14 of cavity, and hole 15 is screwed hole, the first locating rod 4, the second locating rod 6 is threaded rod, and both are connected through a screw thread implementation rotation, and the top of sliding block 5 is provided with the fixation being fixedly connected with pedestal platform 2 Block 3, the lower surface of fixed block 3 fits to limit the vertically displacement of sliding block 5, the Vertical Square with the upper surface of sliding block 5 To being sample Impact direction at the trial, the both sides of positioning sliding block 7 are provided with projection 17, and two projections 17 are inlaid in respectively In chute 18 on 2 two side walls 16 of pedestal platform, the chute 18 is in same level to limit positioning sliding block 7 in specimen holder The side's of holding upward sliding and displacement vertically;
" Z-type " shearing sample 1 mounting means be:
The outer surface of fixed block 3 is fitted with the right flank of the right upper arm 19 of " Z-type " shearing sample 1, and the top of sliding block 5 leads to The first locating rod of precession 4 is crossed to be fitted with the lower surface of right upper arm 19 and the right flank of lower-left arm 20 of " Z-type " shearing sample 1, it is fixed The left surface of the lower-left arm 20 that sample 1 is sheared in the top of position sliding block 7 by the second locating rod of precession 6 with " Z-type " is fitted, and positioning is slided Pad 11 is embedded in come between filling between the two between the left surface of the right upper arm 19 of the top of block 7 and " Z-type " shearing sample 1 Gap, pad 11 can be customized according to different sample thickness and the depth of parallelism, by replacing pad by meet different-thickness sample shear Cut the requirement of test.The upper surface of pad 11 need to be higher than positioning sliding block 7 and fixed block 3, it is ensured that the seaming chuck of universal testing machine is direct Contact pins upper surface, shearing test is carried out to sample;
It is " T-shaped " shearing sample 12 mounting means be:
The outer surface of fixed block 3 is fitted with the preceding surface of the boss 21 of " T-shaped " shearing sample 12, and the top of sliding block 5 leads to Cross the first locating rod of precession 4 to be fitted with the lower surface of boss 21 of " T-shaped " shearing sample 12 and the upper surface of base plate 22, positioning is slided The top of block 7 is fitted by the second locating rod of precession 6 with the lower surface of the base plate 22 of " T-shaped " shearing sample 12, in " T-shaped " shearing Pad 11 is set on the upper surface of the boss 21 of sample 12, and the pad 11 is installed in the outer surface of fixed block 3 and " T-shaped " shearing examination Between the upper surface of the base plate 22 of sample 12.The installation of " T-shaped " sample generally needs two panels pad 11, pad 11 be placed on sample with Between fixed block 3, it is ensured that sample and the gapless of fixed block 3, stable support function is played, for directly contact universal testing machine The upper surface of pad 11 of seaming chuck need to be higher than positioning sliding block 7 and fixed block 3, it is ensured that the seaming chuck directly contact pad of universal testing machine Piece upper surface, shearing test is carried out to sample.
Spring 8 of the suit in cavity 13, one end of the spring 8 and the bottom of positioning sliding block 7 in the second locating rod 6 Offset, the phase of end face 14 that the other end passes through the hole gasket 9 that is sleeved in the second locating rod 6 and adjusting nut 10 and pedestal platform 2 Support.Because positioning sliding block 7, sample and fixed block 3 are only to be in contact, the enough shearing tests of clamp position of sample are not ensured that During do not slide.In addition, if hardness screws the second locating rod 6, sample can be caused to be in rigid clamp position, vertically cut Unavoidable stress is excessive upwards for butt, and other influences are produced on shearing test result.Therefore, the structure design makes positioning sliding block 7 After sample contacts, rotating adjusting nut 10 promotes hole gasket 9 along the axial movement of the second locating rod 6, presses force application spring 8 Contracting, realizes the stress on sample holder direction of positioning sliding block 7, and passes to sample, sample elasticity stress is clamped and is realized receiving Power can adjust.
The hole gasket 9 is square, is agreed with the interior shape of pedestal platform 2, realizes that hole gasket 9 is protected in moving process Hold consistent with the axial direction of the second locating rod 6, make not deflected in the compression process of spring 8.
After completing above-mentioned steps, check whether each face of sample has space with shearing clamp, it is to be adjusted to finish, shearing is pressed from both sides Tool is harmonized with the ram position of universal testing machine, carries out shearing test and analyzes experimental result.

Claims (2)

1. a kind of shearing test clamp, it is characterised in that:The fixture includes a pedestal platform (2), adds at the middle part of pedestal platform (2) Work has the cavity (13) of indent, and sliding block (5), positioning sliding block (7) for clamping sample are placed in the bottom of the cavity (13), under Sliding block (5), positioning sliding block (7) are promoted by the first locating rod (4), the second locating rod (6) respectively, the first locating rod (4), second Locating rod (6) is each passed through the hole (15) on (13) two end faces (14) of cavity, and the top of sliding block (5) is provided with and pedestal platform (2) fixed block (3) being fixedly connected, the lower surface of fixed block (3) fits to limit sliding block with the upper surface of sliding block (5) (5) vertically displacement, the vertical direction is sample Impact direction at the trial, and the both sides of positioning sliding block (7) are set There is projection (17), two projections (17) are inlaid in the chute (18) on (2) two side walls (16) of pedestal platform Nei respectively, the chute (18) in same level limiting positioning sliding block (7) vertically displacement;
" Z-type " shearing sample (1) mounting means be:
The outer surface of fixed block (3) is fitted with the right flank of the right upper arm (19) of " Z-type " shearing sample (1), the top of sliding block (5) Lower surface and the right side of lower-left arm (20) of the right upper arm (19) of sample (1) are sheared by the locating rod of precession first (4) and " Z-type " in portion Side is fitted, and the right-hand end of positioning sliding block (7) shears the lower-left arm of sample (1) by the locating rod of precession second (6) with " Z-type " (20) left surface laminating, the left surface of the right-hand end of positioning sliding block (7) and the right upper arm (19) of " Z-type " shearing sample (1) it Between be embedded in pad (11);
It is " T-shaped " shearing sample (12) mounting means be:
The outer surface of fixed block (3) is fitted with the right lateral surface of the boss (21) of " T-shaped " shearing sample (12), sliding block (5) Lower surface and the right side of base plate (22) of the top by the locating rod of precession first (4) with the boss (21) of " T-shaped " shearing sample (12) Side surface is fitted, and the right-hand end of positioning sliding block (7) is by the locating rod of precession second (6) and " T-shaped " base plate for shearing sample (12) (22) left-hand face laminating, pad (11), the pad are set on the upper surface of the boss (21) of " T-shaped " shearing sample (12) (11) it is installed between the right lateral surface of the base plate (22) of the outer surface of fixed block (3) and " T-shaped " shearing sample (12).
2. shearing test clamp according to claim 1, it is characterised in that:Suit is located at sky in the second locating rod (6) Spring (8) in chamber (13), one end and the left-hand end of positioning sliding block (7) of the spring (8) offset, and the other end is by being sleeved on Hole gasket (9) and adjusting nut (10) in two locating rods (6) offset with the end face (14) of pedestal platform (2).
CN201410784853.9A 2014-12-16 2014-12-16 A kind of shearing test clamp Active CN104535414B (en)

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CN105043850B (en) * 2015-07-15 2017-10-17 兰州理工大学 The adjustable horizontal incident depression bar beam guider of Hopkinson of one kind
CN105300335B (en) * 2015-11-17 2018-11-09 中山联合光电科技股份有限公司 A kind of technique for measuring jig and measured with the jig of optics frame
CN106840851B (en) * 2017-03-10 2019-06-04 上海大学 The unsaturated soil direct shear apparatus experimental rig of adjustable shearing ring diameter
CN107570825A (en) * 2017-10-24 2018-01-12 哈尔滨理工大学 A kind of Wire EDM fixture
CN111239040A (en) * 2020-01-20 2020-06-05 西北工业大学 Asymmetric composite material interface shear mechanical property test device and test method
CN112730045A (en) * 2020-12-21 2021-04-30 中南大学 Shearing clamp and application method thereof

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