CN219511968U - Clamp and tensile testing machine - Google Patents

Abstract

The utility model provides a clamp and a tensile testing machine comprising the clamp. The clamp is used for clamping a workpiece to a tensile testing machine, and comprises a clamping module and a clamping piece, wherein the clamping module is provided with a containing part capable of containing a clamping part of the workpiece, and the clamping piece is provided with an abutting part capable of abutting on at least one surface of the clamping part of the workpiece; the clamping piece is assembled and fixed with the clamping module, and clamps and positions the clamping part of the workpiece in the accommodating part through the abutting part. According to the technical scheme of the utility model, the contact area of the clamp and the clamping part of the workpiece is increased, the clamping stability and the stress uniformity are improved, the occurrence of metal rheology or buckling of the workpiece is avoided, and the accuracy and the reliability of tensile test data are improved.

Description

Clamp and tensile testing machine

Technical Field

The utility model relates to the field of tensile tests, in particular to a clamp and further relates to a tensile testing machine comprising the clamp.

Background

In a common mechanical tensile test, a workpiece sample is often made into a dog bone shape and a strip shape, when the thickness of the workpiece sample is 0.3mm or less, the length and the width of a thin workpiece are far larger than the thickness, so that the workpiece is extremely easy to generate metal rheology or buckling due to the too small cross section area of the workpiece, the tensile test cannot be normally performed, and reliable and effective mechanical property data cannot be obtained.

Disclosure of Invention

The present utility model aims to provide a clamp and a tensile testing machine comprising the clamp, so as to solve or alleviate at least part of the problems mentioned in the background art.

In order to achieve one of the foregoing objects, according to one aspect of the present utility model, there is provided a clamp for clamping a workpiece to a tensile testing machine, the clamp including a clamping module having a receiving portion capable of receiving a clamping portion of the workpiece, and a clamping member having an abutting portion capable of abutting on at least one surface of the clamping portion of the workpiece; the clamping piece is assembled and fixed with the clamping module, and clamps and positions the clamping part of the workpiece in the accommodating part through the abutting part.

In addition to or as an alternative to one or more of the above features, in a further embodiment the end face of the abutment against the clamping portion is the same shape as the clamping portion.

In addition to or as an alternative to one or more of the above features, in further embodiments the receiving portion matches the shape of the abutment portion.

In addition to or as an alternative to one or more of the above features, in a further embodiment, the receiving portion is formed on both sides with abutments projecting into the receiving portion, which abutments abut against the clamping portion of the workpiece.

In addition to one or more of the above features, or as an alternative, in a further embodiment the clamping module is configured as a rectangular plate, the receptacle being arranged in the middle of one end of the rectangle and lying on the symmetry axis of the rectangle.

In addition to or as an alternative to one or more of the above features, in a further embodiment the clamping member is formed with recesses on both sides of the abutment, which recesses abut against a surface of the clamping module.

In addition to or as an alternative to one or more of the above features, in a further embodiment the receiving portion is an opening recessed from an edge of the clamping module towards the interior of the clamping module, the abutment portions of the two clamping members clamping and positioning the clamping portion of the workpiece in the opening.

In addition to or as an alternative to one or more of the above features, in a further embodiment the clamping module has a mounting hole at an end opposite the receptacle, via which the clamping module is mounted to the tensile testing machine.

In addition to or as an alternative to one or more of the above features, in a further embodiment the mounting holes are arranged on the symmetry axis of the rectangle.

In order to achieve one of the foregoing objects, according to another aspect of the present utility model, there is provided a tensile testing machine including the jig described in the foregoing aspects, to which a workpiece is fixedly connected at the time of testing.

According to the clamp and the tensile testing machine comprising the clamp, the contact area of the clamp and the workpiece clamping part is increased by utilizing the abutting part of the clamping piece, the clamping stability and the stress uniformity are improved, the occurrence of metal rheology or buckling of a workpiece is avoided, the smooth performance of a tensile test is promoted, and the accuracy and the reliability of test data are improved.

Drawings

The present disclosure will become more apparent with reference to the accompanying drawings. It is to be understood that these drawings are solely for purposes of illustration and are not intended as a definition of the limits of the utility model. In the figure:

FIG. 1 is a schematic illustration of a workpiece;

FIG. 2 shows an exploded schematic view of a clamp according to one embodiment of the utility model;

FIG. 3 shows an assembled schematic view of the clamp of FIG. 2;

FIG. 4 shows a schematic view of a clamp; and

fig. 5 shows a schematic view of a clamping module.

Detailed Description

The utility model will be described in detail hereinafter with reference to exemplary embodiments in the accompanying drawings. It should be understood, however, that this utility model may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. These embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the utility model to those skilled in the art.

Furthermore, to any single feature described or implied in the embodiments mentioned herein, or any single feature shown or implied in the figures, it is easily conceivable for a person skilled in the art to continue to make appropriate combinations or omissions between these features (or equivalents thereof), thereby obtaining still further embodiments of the utility model that may not be directly mentioned herein, without departing from the scope of the utility model.

Fig. 1 is a schematic view of a workpiece 200, a sample to be measured being processed into the elongated workpiece 200 of fig. 1, which may be a thin sheet of metal or stainless steel material having a thickness of 0.3mm and less. Fig. 2 shows an exploded view of the jig 100 according to an embodiment of the present utility model, and fig. 3 is an assembled view of the jig 100 of fig. 2. The clamp 100 is used to clamp a workpiece 200 to a tensile tester. The clip 100 includes a clip 110 having an abutment 111 and a clip module 120 having a receptacle 121. In the tensile test, the two clamping members 110 relatively approach the abutting portions 111 thereof and respectively abut against the surfaces of the clamping portions 210 of the workpiece 200 to clamp the clamping portions 210 of the workpiece 200 between the abutting portions 111, the abutting portions 111 and the clamping portions 210 of the workpiece 200 are accommodated and fixed together in the accommodating portions 121 of the clamping modules 120, and after both the clamping portions 210 of the workpiece 200 are fixed with the clamp 100, the clamping modules 120 can be connected to a tensile tester to perform a mechanical test. By the large area contact between the abutment 111 and the clamping portion 210 of the workpiece 200, the force stability of the clamping portion 210 is increased, and abnormal metal rheology and buckling of the workpiece 200 during testing is avoided.

With the arrangement, the clamp realizes stable clamping and fixing of the workpiece, and avoids metal rheology and buckling caused by the excessive thinness of the workpiece, so that the true and reliable mechanical property data obtained by the test are ensured.

Further modifications to the clamp will be introduced below by way of example to further improve its efficiency, reliability or other improvements.

Fig. 4 is a schematic view of the clamping member 110, and it can be seen that the end surface of the abutting portion 111 abutting against the clamping portion 210 of the workpiece 200 shown in fig. 1 has the same shape as the clamping portion 210, so that the clamping portion 210 is uniformly stressed and is not easily deformed during clamping. The clamp 110 is formed with recesses 112 at both sides of the abutting portion 111, as shown in fig. 3, the recesses 112 abut against the surface of the clamp module 120 when assembled, and the clamp 110 may be fixed to the clamp module 120 at the recesses 112 by bolts.

Fig. 5 shows a schematic view of the clamping module 120. Wherein the clamping module 120 is constructed in a rectangular plate, and the receiving part 121 is disposed at one end of the rectangle and on the symmetry axis of the rectangle, more specifically, as shown in fig. 5, the receiving part 121 is an opening recessed from the edge of the clamping module 120 toward the inside of the clamping module 120. The receiving portion 121 is formed at both sides thereof with a catching portion 122 protruding into the receiving portion 121, and the catching portion 122 is adapted to be caught on the clamping portion 210 of the workpiece 200 to define the workpiece 200 in a stretching direction (i.e., a left-right direction of the workpiece 200 in fig. 1 or an up-down direction of the clamping module 120 in fig. 5), and to provide support for a bent portion 220 (see fig. 1) of the clamping portion 210 of the workpiece 200 during stretching, thereby reducing stress concentration therein, avoiding deformation, breakage, etc. Accordingly, as shown, the receiving portion 121 including the abutting portion 122 may have a shape that cooperates with the clamping portion 210 of the workpiece 200 and the abutting portion 111 of the clamping member 110 to abut and support the clamping portion 210 in the stretching direction. As can be seen from the assembly schematic diagram of fig. 3, the accommodating portion 121 can be further extended toward the inside of the clamping module 120 in the stretching direction, so that a gap is remained between the clamping module 120 and the clamping member 110 after assembly, so that the clamping module 120 can be matched with the clamping member 110 with different sizes, and meanwhile, the machining precision of the accommodating portion 121 can be reduced, so that the machining difficulty is reduced.

In other embodiments, one clamping member 110 or only the abutting portion 111 of one clamping member 110 may be integrally formed in the receiving portion 121 of the clamping module 120, or may be recessed inward in the thickness direction thereof from the surface of the clamping module 120 to form the receiving portion 121, and after the clamping portion 210 of the workpiece 200 is placed in the receiving portion 121, the clamping portion 210 is clamped and fixed by one independent clamping member 110. Thus, the number of parts can be reduced and the installation process can be simplified.

In the embodiment shown in fig. 5, the grip module 120 has a mounting hole 123 at an end opposite to the receiving part 121, and the grip module 120 is mounted to the tensile tester via the mounting hole 123. The mounting hole 123 and the accommodating portion 121 are arranged on the same symmetry axis of the rectangular clamping module 120, so that the symmetry axis of the clamping module 120 is collinear with the symmetry axis of the workpiece 200 clamped in the accommodating portion 121, and the stress direction is consistent and uniform during stretching, thereby ensuring that the test is performed smoothly.

With the arrangement, the clamp provided by the utility model has the advantages that the clamping area is effectively increased, so that the stress of a workpiece is uniform, the sheet workpiece is prevented from generating metal rheology or buckling during stretching, and the accuracy and the reliability of a tensile test are obviously improved.

The above examples mainly illustrate the clamp and tensile testing machine of the present utility model. Although only a few embodiments of the present utility model have been described, those skilled in the art will appreciate that the present utility model can be embodied in many other forms without departing from the spirit or scope thereof. Accordingly, the present examples and embodiments are to be considered as illustrative and not restrictive, and the utility model is intended to cover various modifications and substitutions without departing from the spirit and scope of the utility model as defined by the appended claims.

Claims (10)

1. A clamp for clamping a workpiece (200) to a tensile testing machine, characterized in that the clamp (100) comprises:

a clamping module (120) having a receiving portion (121) capable of receiving a clamping portion (210) of the workpiece (200); and

a clamp (110) having an abutment (111) capable of abutting on at least one surface of the clamp (210) of the workpiece (200);

the clamping piece (110) is assembled and fixed with the clamping module (120), and the clamping part (210) of the workpiece (200) is clamped and positioned in the accommodating part (121) through the abutting part (111).

2. The clamp according to claim 1, characterized in that an end face of the abutment portion (111) abutting the clamping portion (210) is the same shape as the clamping portion (210).

3. The clamp according to claim 1, characterized in that the receiving portion (121) matches the shape of the abutment portion (111).

4. A jig according to claim 3, wherein the accommodating portion (121) is formed on both sides thereof with a catching portion (122) protruding into the accommodating portion (121), the catching portion (122) catching on the holding portion (210) of the workpiece (200).

5. The clamp according to any one of claims 1-4, characterized in that the clamping module (120) is configured as a rectangular plate, the receptacle (121) being arranged in the middle of one end of the rectangle and on the symmetry axis of the rectangle.

6. The clamp according to claim 5, characterized in that the clamping member (110) is formed with recesses (112) on both sides of the abutment portion (111), the recesses (112) abutting against the surface of the clamping module (120).

7. The clamp according to claim 5, characterized in that the receiving portion (121) is an opening recessed from an edge of the clamping module (120) toward an inside of the clamping module (120), in which opening the abutment portions (111) of the two clamping members (110) clamp and position the clamping portion (210) of the workpiece (200).

8. The clamp according to claim 5, characterized in that the clamping module (120) has a mounting hole (123) at an end opposite the receiving portion (121), the clamping module (120) being mounted to the tensile testing machine via the mounting hole (123).

9. The clamp according to claim 8, characterized in that the mounting hole (123) is arranged on the symmetry axis of the rectangle.

10. A tensile testing machine, characterized in that it comprises a clamp (100) according to any one of claims 1-9, to which a workpiece (200) is fixedly connected during testing via the clamp (100).