Clamping tool of thin plate type sample for tensile test
By designing the clamping friction force of the clamping block and the pin fixing, the problem of easy damage to thin plate specimens in tensile tests was solved, and the accuracy and success rate of test data were improved.
Patent Information
- Application Number
- CN202520692304.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-14
- Publication Date
- 2026-02-17
- Estimated Expiration
- 2035-04-14
AI Technical Summary
Existing tensile testing machines are prone to inaccurate data or even test failure when testing thin plate specimens due to fixture damage or pin deformation.
Design a clamping fixture that uses the interlocking friction between clamping blocks and pins to fix both ends of a thin plate sample. Through the specific shape matching of the upper and lower clamping blocks and the mechanical fixation of the pins, ensure that the sample does not break due to insufficient rigidity during the tensile process.
It improves the success rate and data accuracy of tensile tests on thin plate specimens, avoiding specimen damage and data inaccuracy caused by traditional fixtures.
Smart Images
Figure CN223926149U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to test frock, especially a kind of tensile test frock, specifically speaking, a kind of clamping frock of sheet type sample for tensile test. BACKGROUND
[0002] In the field of metal materials, tensile test is carried out on metal sheet to determine its tensile strength, yield strength, elongation and reduction of area, which is the core means to evaluate its mechanical properties and ensure the reliability of engineering application.
[0003] Conventional tensile testing machine has flat-jawed clamp or hydraulic wedge clamp, and directly clamps, since the thickness of sheet is thin, it is easy to damage sheet sample, so as to cause the place of fracture not to be standard required "gauge length" area, so that test fails, and for high-temperature tensile test, pin shaft is usually used to fix sample, and the area fixed by pin shaft is also easy to deform under high temperature, even to be pulled off, so as to cause data misalignment, even test failure.
[0004] Therefore, aiming at the above problems, a kind of clamping frock of sheet type sample for tensile test is designed to solve the above problems. INVENTION CONTENTS
[0005] The utility model aims at the condition that sheet sample is easy to damage in tensile test process, designs a kind of clamping frock of sheet type sample for tensile test, relies on the occlusal friction force between clamping block and pin shaft to fix two ends of sheet tensile test, ensures the accuracy of tensile test data, and improves the success rate of sheet sample tensile test.
[0006] The technical scheme of the utility model is:
[0007] A kind of clamping frock of sheet type sample for tensile test, including sheet type tensile sample 4 and structure symmetry same for respectively from sheet type tensile sample 4 two ends clamping its clamping head, it is characterized in that, the clamping head includes upper clamping block 1, lower clamping block 2, pin shaft 3, fixed bolt 5 and fixed nut 6;Sheet type tensile sample 4 is clamped in between upper clamping block 1 and lower clamping block 2 at one end, fixed bolt 5 and fixed nut 6 are used to connect upper clamping block 1 and lower clamping block 2 into a whole, pin shaft 3 is inserted into the blind hole of lower clamping block 2 after passing through the mounting hole of upper clamping block 1 and sheet type tensile sample 4 end to provide the tensile capacity of sheet type tensile sample 4, upper clamping block 1 and lower clamping block 2 clamp sheet type tensile sample 4 through friction force to prevent sheet type sheet type tensile sample 4 from breaking at the position outside sample gauge length due to insufficient rigidity in tensile test process, so as to cause the risk of test failure.
[0008] The upper clamping block 1 has a protruding feature and is contracted at the end, the overall protruding feature size exceeds the standard sample size by 3-5mm, the protruding height is 1 / 3-1 / 2 of the total thickness of the upper clamping block 1, the wide head region is provided with a through hole, and the four ends are provided with semicircular through holes.
[0009] The lower clamping block 2 has a recessed feature and is contracted at the end, the overall recessed feature size exceeds the standard sample size by 3-5mm, the recessed depth is 1 / 3-1 / 2 of the total thickness of the clamping block B2, the wide head region is provided with a blind hole, and the four ends are provided with semicircular through holes.
[0010] The protruding feature of the upper clamping block 1 and the recessed feature of the lower clamping block 2 are matched and can be occluded without interference.
[0011] The through hole on the upper clamping block 1 and the blind hole on the lower clamping block 2 are matched to pass through the pin shaft 3, and the through holes at the four ends of the upper clamping block 1 and the through holes around the four ends of the lower clamping block 2 are mechanically fixed by the fixing bolt 5 and the fixing nut 6.
[0012] The thin plate type tensile sample 4 is a standard sample required by the standard, the clamping section at the two ends of the sample is provided with a through hole, the size and position of the through hole are matched with the size of the through hole of the upper clamping block and the blind hole of the lower clamping block, and the pin shaft 3 can be used to complete mechanical fixation.
[0013] The upper clamping block and the lower clamping block are mechanically fixed by the fixing bolt and the fixing nut, so that the upper clamping block and the lower clamping block are occluded and clamped, thereby fixing the two ends of the thin plate type tensile sample.
[0014] The pin shaft 3 is used to fix the clamping block A1, the thin plate type tensile sample 4 and the clamping block B2, and further prevents the phenomenon of pulling off and causing test failure due to insufficient occlusion friction of the thin plate type tensile sample 4 and the clamping block A1 and the clamping block B2 during the tensile test.
[0015] The thickness of the thin plate type tensile sample 4 is less than 1mm.
[0016] The upper clamping block and the lower clamping block are mechanically fixed by the fixing bolt and the fixing nut, so that the upper clamping block and the lower clamping block are occluded and clamped, thereby fixing the two ends of the thin plate type tensile sample.
[0017] The utility model is different from the traditional wedge-shaped clamp directly clamping the tool to cause sample damage and test failure, and uses the occlusion friction of the clamping block and the pin shaft to fix the thin plate type sample, so that the data is accurate and the test is qualified. BRIEF DESCRIPTION OF DRAWINGS
[0018] Figure 1 It is an assembly structure schematic view of the utility model.
[0019] Figure 2 It is a standard thin plate type tensile sample structure schematic view of the utility model.
[0020] Figure 3 It is the structure schematic view of the upper clamping block of the utility model.
[0021] Figure 4 It is the structure schematic view of the lower clamping block of the utility model. CONCRETE EMBODIMENT
[0022] The utility model will be further explained in connection with the drawings and examples, any change made according to the technical scheme of the utility model, the function produced does not exceed the range of the technical scheme of the utility model, belongs to the protection scope of the utility model.
[0023] As Figures 1-4 Indicated.
[0024] A kind of clamping tool for sheet type sample of tensile test, including sheet type tensile sample 4 and structure symmetric same for respectively from sheet type tensile sample 4 two ends clamping it clamping head, as Figure 1 Indicated. The sheet type tensile sample 4 is standard sample required by standard, and the clamping section at the two ends of sample is provided with through hole, and the size and position dimension of through hole are adapted with the size of the through hole of upper clamping block and the size of blind hole of lower clamping block, can use pin shaft 3 to complete mechanical fixation, and its thickness is less than 1mm, as Figure 2 Indicated. The clamping head includes upper clamping block 1, lower clamping block 2, pin shaft 3, fixed bolt 5 and fixed nut 6;Sheet type tensile sample 4 is clamped in between upper clamping block 1 and lower clamping block 2, fixed bolt 5 and fixed nut 6 are used to connect upper clamping block 1 and lower clamping block 2 into an entirety, pin shaft 3 is inserted into the blind hole of lower clamping block 2 after passing through the mounting hole of upper clamping block 1 and sheet type tensile sample 4 end to provide the tensile capacity of sheet type tensile sample 4, and upper clamping block 1 and lower clamping block 2 clamp sheet type tensile sample 4 through friction force to prevent the risk of test failure caused by the fracture of sheet type tensile sample 4 due to insufficient rigidity in the process of tensile test in the part outside sample gauge length. As Figure 3 Indicated, upper clamping block 1 has protruding feature, and is in the shape of shrinkage at end, the overall size of protruding feature exceeds 3~5mm of the size of standard sample, the protruding height is 1 / 3~1 / 2 of the total thickness of upper clamping block 1, and the wide head area is provided with through hole, and is provided with half long circular through hole at four ends. As Figure 4As shown, the lower clamping block 2 has a recessed feature and is tapered at the end, the overall size of the recessed feature exceeds the standard sample size of 3~5mm, the recessed depth is 1 / 3~1 / 2 of the total thickness of the clamping block B2, the wide head area is provided with a blind hole, and the four ends are provided with half-round through holes. The protruding feature of the upper clamping block 1 and the recessed feature of the lower clamping block 2 are matched, and the occlusion can be completed without interference, the through hole on the upper clamping block 1 and the blind hole on the lower clamping block 2 are matched to pass through the pin shaft 3, and the through holes at the four ends of the upper clamping block 1 and the through holes around the four ends of the lower clamping block 2 are mechanically fixed by the fixing bolts 5 and the fixing nuts 6. The upper clamping block and the lower clamping block are mechanically fixed by the fixing bolts and the fixing nuts, so that the upper clamping block and the lower clamping block are occluded and clamped, thereby fixing the two ends of the sheet type tensile test. The pin shaft 3 is used to fix the upper clamping block 1, the sheet type tensile test sample 4 and the lower clamping block 2, which can further prevent the phenomenon of pulling off and causing the test to fail due to insufficient occlusion friction between the sheet type tensile test sample 4 and the upper clamping block 1 and the lower clamping block 2 during the tensile test.
[0025] The thickness of the sheet type tensile test sample 4 is less than 1mm.
[0026] The part not involved in the utility model is the same as the prior art or can be realized by using the prior art.
Claims
1. A clamping jig for a sheet type test specimen for a tensile test, comprising a sheet type tensile test specimen (4) and clamping heads symmetrical in structure for clamping the sheet type tensile test specimen (4) from both ends thereof, respectively, characterized in that, The clamping head comprises an upper clamping block (1), a lower clamping block (2), a pin shaft (3), a fixing bolt (5) and a fixing nut (6); one end of the sheet type tensile specimen (4) is clamped between the upper clamping block (1) and the lower clamping block (2), the fixing bolt (5) and the fixing nut (6) are used to connect the upper clamping block (1) and the lower clamping block (2) into one body, the pin shaft (3) is inserted into the blind hole of the lower clamping block (2) after passing through the mounting hole of the upper clamping block (1) and the end of the sheet type tensile specimen (4) to provide the tensile capacity of the sheet type tensile specimen (4), the upper clamping block (1) and the lower clamping block (2) clamp the sheet type tensile specimen (4) through friction to prevent the sheet type tensile specimen (4) from being broken outside the gauge length of the specimen due to insufficient rigidity of the specimen itself during the tensile test, thereby causing the risk of test failure.
2. The gripping tool for a sheet-type test piece for a tensile test according to Claim 1, characterized by The upper clamping block (1) has a protruding feature and is contracted at the end, the overall size of the protruding feature exceeds the standard specified specimen size by 3-5 mm, the protruding height is 1 / 3-1 / 2 of the total thickness of the upper clamping block (1), the wide head region is provided with a through hole, and a half-long circular through hole is provided at four ends.
3. The thin sheet specimen holding jig for tensile testing according to Claim 1, wherein The lower clamping block (2) has a recessed feature and is contracted at the end, the overall size of the recessed feature exceeds the standard specified specimen size by 3-5 mm, the recessed depth is 1 / 3-1 / 2 of the total thickness of the clamping block B2, the wide head region is provided with a blind hole, and a half-long circular through hole is provided at four ends.
4. The gripping tool for a sheet-type test piece for a tensile test according to Claim 1, wherein The protruding feature of the upper clamping block (1) and the recessed feature of the lower clamping block (2) are matched and can be occluded without interference.
5. The thin sheet specimen holding tool for tensile testing according to Claim 1, wherein The through hole on the upper clamping block (1) and the blind hole on the lower clamping block (2) are matched to pass the pin shaft (3), and the through holes at four ends of the upper clamping block (1) and the through holes around four ends of the lower clamping block (2) are mechanically fixed by the fixing bolt (5) and the fixing nut (6).
6. The gripping tool for a sheet-type test piece for a tensile test according to Claim 1, wherein The sheet type tensile specimen (4) is a standard specimen required by the standard, the clamping sections at both ends of the specimen are provided with through holes, the size and position of the through holes are matched with the size of the through hole of the upper clamping block and the blind hole of the lower clamping block, and the pin shaft (3) can be used to complete mechanical fixation.
7. The gripping tool for a sheet-type test piece for a tensile test according to Claim 1, wherein The upper clamping block and the lower clamping block are mechanically fixed by the fixing bolt and the fixing nut, so that the upper clamping block and the lower clamping block are occluded and clamped, thereby fixing both ends of the sheet type tensile specimen.
8. The gripping tool for a sheet-type test piece for a tensile test according to Claim 1, characterized by The thickness of the sheet type tensile specimen (4) is less than 1 mm.