CN219142466U - Small-size thick plate-shaped tensile sample clamp - Google Patents
Small-size thick plate-shaped tensile sample clamp Download PDFInfo
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- CN219142466U CN219142466U CN202223591672.3U CN202223591672U CN219142466U CN 219142466 U CN219142466 U CN 219142466U CN 202223591672 U CN202223591672 U CN 202223591672U CN 219142466 U CN219142466 U CN 219142466U
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Abstract
The utility model provides a small-size thick platelike tensile sample anchor clamps, includes the anchor clamps body and apron, and the anchor clamps body comprises thin end and thick end, and thick end is provided with logical groove, and the apron comprises the apron body and the arch of setting on the apron body, leads to groove and bellied shape and the unanimous with the clamping end shape of the thick platelike tensile sample of small-size, and the apron is fixed on the anchor clamps body, and the arch is pressed on leading to the groove. When the clamp is used, two sets of clamps are adopted, one clamping end of a small-size thick plate-shaped tensile sample is firstly placed in a through groove of the thick end of a clamp body of one set of clamp, then a cover plate is covered on the clamping end and is fixed, the other clamping end of the tensile sample is fixed between the clamp body of the other set of clamp and the cover plate according to the same process, and finally the clamp is fixed on a universal testing machine. The clamp has the characteristics of automatic centering, no shielding of parallel sections, high universality, simple structure and the like, ensures that a sample breaks in the parallel sections, is convenient to use in cooperation with a non-contact extensometer, and has high accuracy of test results.
Description
Technical Field
The utility model relates to a sample clamp used in a tensile test process, in particular to a small-size thick plate-shaped tensile sample clamp, and belongs to the technical field of metal tensile test tools.
Background
In order to obtain the mechanical properties of the metal material, a tensile test is one of important test methods for representing indexes such as strength, elongation and the like of the material. In general, a flat plate clamp or a V-shaped clamp provided on a universal tester is only suitable for clamping conventional tensile samples such as large-size tensile samples or thin sheets. However, when a plate-shaped sample with small size and large thickness is stretched, the problems that the contact surface between the clamping end of the sample and the clamp is small and the opening of the clamp is too large and the sample moves upwards excessively exist, so that the phenomenon that the sample is easy to slip, the clamp cannot clamp the sample and even the clamp collides in the stretching process is caused. FIG. 1 shows a small-sized thick plate-like tensile specimen with smaller outer dimensions and larger thickness, each dimension being marked in the drawing, with wider ends being the clamping ends during tensile testing, and parallel sections between the clamping ends.
According to the report of the prior publication, the prior self-made stretching clamp suitable for small-size is generally complex in structure, and the parallel section is shielded from being matched with the non-contact extensometer, so that the problems of poor centering and universality and the like are solved.
Disclosure of Invention
Aiming at the problems of the existing clamping technology of the small-size thick plate-shaped tensile sample, the utility model provides the small-size thick plate-shaped tensile sample clamp which is suitable for clamping the small-size thick plate-shaped tensile sample for the tensile test of various test auxiliary devices, and solves the difficult problem of stretching the plate-shaped sample with small size and large thickness.
The small-size thick plate-shaped tensile sample clamp is realized by the following technical scheme:
the clamp comprises a clamp body and a cover plate, wherein the clamp body is composed of a thin end and a thick end, the thick end is provided with a through groove, the cover plate is composed of a cover plate body and a bulge arranged on the cover plate body, the through groove and the bulge are consistent with the clamping end of a small-size thick plate-shaped tensile sample, the cover plate is fixed on the clamp body, and the bulge is pressed on the through groove.
And a transition arc is arranged between the thin end and the thick end.
The width L of the clamp body is 2.5-3 times of the width of the small-size thick plate-shaped tensile sample.
The height H of the clamp body is more than 1.5 times of the height of the small-size thick plate-shaped tensile sample.
Thickness T of the thick end 2 Thickness t of not less than small-size thick plate-like tensile specimen 0 The height h of the thick end is not smaller than the height of the through groove.
Thickness T of the thin end 1 Thickness T of thick end 2 1/2 of (C).
Threaded holes are symmetrically formed in two sides of the through groove at the thick end of the clamp body.
Threaded holes are symmetrically formed in the two sides of the protrusions on the cover plate.
Thickness t of the cover plate body 1 Thickness t of small-size thick plate-shaped tensile sample 0 1/2 of (C).
Thickness t of the protrusion 2 Thickness T of thick end 2 Thickness t of small-size thick plate-like tensile specimen 0 1/2 of the difference.
The two sets of clamps are adopted when the clamp is used. Firstly, one clamping end of a small-size thick plate-shaped tensile sample is placed in a through groove of the thick end of a clamp body of a set of clamp, then a cover plate is covered on the clamping end, and the clamp body and the cover plate are fixed by bolts and nuts. And fixing the other clamping end of the tensile sample between the clamp body and the cover plate of the other set of clamp according to the same process, fixing the two sets of clamps on the tensile sample in a mirror symmetry mode, realizing automatic centering of the sample, and finally fixing the clamps on a universal testing machine.
For example, when a universal testing machine with a DIC testing device is used for stretching, when the small-size thick plate-shaped stretching sample clamp is used for clamping a sample, the parallel section of the stretching sample is ensured to be free from shielding, and after the spot spraying treatment of the surface to be tested of the stretching sample, the DIC test is conveniently carried out on the surface to be tested; the same small-size thick plate-shaped tensile sample clamp is suitable for tensile tests of different testing auxiliary devices such as other non-contact extensometers, contact extensometers and the like.
The utility model is suitable for clamping small-size thick plate-shaped tensile samples for the tensile test of various test auxiliary devices, ensures that the parallel sections of the tensile samples are free from shielding, ensures that the samples break in the parallel sections, and is convenient to be matched with a non-contact extensometer for use. The problems that a tensile sample with small tensile size and large thickness cannot be stretched by a universal testing machine, the parallel section of an existing self-made clamp for public information is shielded, the use of a non-contact extensometer cannot be matched, the sample is difficult to clamp or skid, the structure is complex, the universality is poor and the like are solved.
Drawings
Fig. 1 is a schematic structural view of a small-sized thick plate-like tensile specimen.
FIG. 2 is a schematic view of the overall structure of the small-size thick plate-like tensile specimen holder of the present utility model; wherein: (a) Is a front view and (b) is a left view (with the cover plate 2, bolts 3 and nuts 4 removed).
FIG. 3 is a schematic view of the structure of the clamp body of the present utility model; wherein: (a) is a front view, and (b) is a left view.
FIG. 4 is a schematic view of the structure of the cover plate in the present utility model; wherein: (a) is a front view, and (b) is a left view.
Wherein: 1. a clamp body; 2. a cover plate; 3. a bolt; 4. a nut; 5. and (5) stretching the sample.
11. A thin end; 12. a transitional arc; 13. a thick end; 14. a through groove; 15. a threaded hole;
21. a cover plate body; 22. a threaded hole; 23. a protrusion.
Detailed description of the preferred embodiments
The small-sized thick plate-like tensile specimen holder of the present utility model, which is suitable for holding the small-sized thick plate-like tensile specimen shown in fig. 1, will be described in detail below with reference to fig. 2, 3 and 4.
As shown in fig. 2, the small-sized thick plate-like tensile specimen clamp of the present utility model includes a clamp body 1, a cover plate 2, a bolt 3, and a nut 4. The width L of the jig is 2.5 to 3 times the width of the tensile specimen 5.
The clamp body 1 adopts die steel with high strength, so that breakage does not occur in the tensile test process. As shown in fig. 3, the clamp body 1 includes a thin end 11 and a thick end 13, the thin end 11 reduces the opening of the V-shaped clamp of the universal testing machine, the part to be clamped is shortened, and meanwhile, the thickness dimension difference between the thin end 11 and the thick end 13 is set, so that the weight of the whole clamp can be reduced, and the tensile test is easier to implement. Between the thin end 11 and the thick end 13 is a transitional arc 12, thereby avoiding breakage caused by stress concentration of the clamp body 1 during a tensile test.
As shown in fig. 3, the height H of the clamp body is about 1.5 times or more the height of the tensile specimen. The thick end 13 is centrally provided with a through groove 14 (see fig. 3 (b)) having a shape in conformity with the shape of the clamping end (both ends) of the tensile specimen 5, while the thick end 13 is symmetrically provided with threaded holes 15 on both sides of the through groove 14 with a diameter of Φ5mm. Thickness T of thick end 13 2 (see FIG. 3) is not less than the thickness t of the tensile specimen 5 0 (see fig. 1), the height h of the thick end 13 is not less than the height of the through groove 14. Thickness T of thin end 11 1 Thickness T of about thick end 13 2 1/2 of (C).
As shown in fig. 4, the cover plate 2 includes a cover plate body 21 and a protrusion 23 provided on the cover plate body 21, the protrusion 23 conforms to the shape of the clamping end of the tensile specimen 5, so that the specimen clamping is tighter. Symmetrically distributed threaded holes 22 are arranged on two sides of the protrusion 23 on the cover plate body 21, the diameter of the symmetrically distributed threaded holes is the same as that of the threaded holes 15, phi 5mm, and the distance between the two threaded holes 22 is consistent with that between the two threaded holes 15.
As shown in fig. 4 (a), the thickness t of the cover plate body 21 1 Not less than the thickness t of the tensile specimen 5 (see FIG. 1) 0 1/2 of (C). Thickness t of the protrusion 23 2 Thickness T of thick end 13 2 Thickness t of tensile specimen 5 0 1/2 of the difference.
As shown in FIG. 1, the length of the parallel section of the tensile specimen 5 can be freely designed, for example, the length of the parallel section is 4mm, and the total length of the specimen is 10mm, namely, the utility model is suitable for clamping the tensile specimen with small size. Thickness t of tensile sample 5 in FIG. 1 0 The length of the parallel section is 12mm, and the width is set to be 4mm, 5mm, 6mm and 7mm respectively, the width is set to be 10mm, the length is 38 mm. According to the structure of the clamp, the dimensional parameters of the clamp body 1 and the cover plate 2 are shown in the following table, namely, the utility model can be based on the thickness t of the bulge 23 2 The cover plate 2 is replaced to adapt to various thicknesses t 0 The clamping of the tensile specimen 5 is highly versatile.
Taking a tensile test using a universal tester equipped with a DIC testing apparatus as an example, the above-described jig was used as follows.
As shown in FIG. 2, the tensile test specimen is first tested according to the thickness t 0 Selecting the thickness t of the corresponding protrusion 23 2 The cover plate 2 of the tensile sample to be tested is subjected to spot spraying treatment on the observation surface in the thickness direction of the tensile sample to be tested, two clamping sections of the tensile sample to be tested are respectively placed in the through grooves 14 of the thick end 13 in the clamp body 1, then the cover plate 2 is pressed on the thick end 13, the threaded holes 22 are aligned with the threaded holes 15, the bolts 3 penetrate, and the nuts 4 are used for fastening. Thus, the two clamping ends of the tensile sample 5 are fixed together by the two clamp bodies 1 and the cover plate 2 in a mirror image mode, the tensile sample 5 realizes automatic centering, and finally the assembled clamp is fixed on the universal testing machine. The same small-size thick plate-shaped tensile sample clamp is suitable for tensile tests of different test auxiliary devices such as a laser extensometer, a contact extensometer and the like.
Claims (10)
1. A small-size thick plate-shaped tensile sample fixture is characterized in that: including the anchor clamps body and apron, the anchor clamps body comprises thin end and thick end, and thick end is provided with logical groove, and the apron comprises the apron body and the arch of setting on the apron body, leads to groove and bellied shape and the clamping end shape of the heavy plate form tensile sample of minor dimension unanimous, and the apron is fixed on the anchor clamps body, and the arch is pressed on leading to the groove.
2. The small-size thick plate-like tensile specimen holder according to claim 1, characterized in that: and a transition arc is arranged between the thin end and the thick end.
3. The small-size thick plate-like tensile specimen holder according to claim 1, characterized in that: the width L of the clamp body is 2.5-3 times of the width of the small-size thick plate-shaped tensile sample.
4. The small-size thick plate-like tensile specimen holder according to claim 1, characterized in that: the height H of the clamp body is more than 1.5 times of the height of the small-size thick plate-shaped tensile sample.
5. The small-size thick plate-like tensile specimen holder according to claim 1, characterized in that: thickness T of the thick end 2 Thickness t of not less than small-size thick plate-like tensile specimen 0 The height h of the thick end is not smaller than the height of the through groove.
6. The small-size thick plate-like tensile specimen holder according to claim 1, characterized in that: thickness T of the thin end 1 Thickness T of thick end 2 1/2 of (C).
7. The small-size thick plate-like tensile specimen holder according to claim 1, characterized in that: threaded holes are symmetrically formed in two sides of the through groove at the thick end of the clamp body.
8. The small-size thick plate-like tensile specimen holder according to claim 1, characterized in that: threaded holes are symmetrically formed in the two sides of the protrusions on the cover plate.
9. The small-size thick plate-like tensile specimen holder according to claim 1, characterized in that: thickness t of the cover plate body 1 Thickness t of small-size thick plate-shaped tensile sample 0 1/2 of (C).
10. The small-size thick plate-like tensile specimen holder according to claim 1, characterized in that: thickness t of the protrusion 2 Thickness T of thick end 2 Thickness t of small-size thick plate-like tensile specimen 0 1/2 of the difference.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223591672.3U CN219142466U (en) | 2022-12-28 | 2022-12-28 | Small-size thick plate-shaped tensile sample clamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223591672.3U CN219142466U (en) | 2022-12-28 | 2022-12-28 | Small-size thick plate-shaped tensile sample clamp |
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| Publication Number | Publication Date |
|---|---|
| CN219142466U true CN219142466U (en) | 2023-06-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223591672.3U Active CN219142466U (en) | 2022-12-28 | 2022-12-28 | Small-size thick plate-shaped tensile sample clamp |
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|---|---|
| CN (1) | CN219142466U (en) |
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- 2022-12-28 CN CN202223591672.3U patent/CN219142466U/en active Active
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