CN212748525U - Clamp for tensile experiment - Google Patents

Abstract

A clamp for a tensile experiment belongs to the field of physical experiments. The problem of the test piece mounting fixture that tensile experiment machine used structure complicated, quality and bulky, easily take place test piece tip slippage phenomenon is solved. The utility model comprises a base and N clamping mechanisms; the side wall of the base is provided with a plurality of threaded holes, and all the threaded holes are uniformly distributed along the circumferential direction of the base; each threaded hole on the base corresponds to one clamping mechanism; one end face of the base is fixedly connected with the driving end of the tensile testing machine; each clamping mechanism comprises a screw, a first nut, a second nut, a clamping piece and an internal thread cylinder; one end of the internal thread cylinder is fixedly connected with the bottom surface of the clamping piece; the screw rod is in threaded connection with the threaded hole in the base and penetrates through the side wall of the base; the first nut and the second nut are screwed on the screw rod, the first nut is positioned on the outer side of the side wall of the base, and the second nut is positioned on the inner side of the side wall of the base; the internally threaded barrel is screwed on the free end of the screw. The clamping device is mainly used for clamping the end part of a test piece.

Description

Clamp for tensile experiment

Technical Field

The utility model belongs to the physical experiment field, concretely relates to anchor clamps for physical tensile experiments.

Background

The tensile test is a test method for measuring mechanical properties of a material under an axial tensile load. The data obtained by the tensile test can be used for determining the elastic limit, the elongation, the elastic modulus, the proportion limit, the area reduction, the tensile strength, the yield point, the yield strength and other tensile property indexes of the material.

In order to meet the requirement of the stretching equipment on the stretching of the workpiece, a clamp is arranged in the stretching equipment, the clamp clamps and fixes the end part of the workpiece, and then a driving device in the stretching equipment drives the two ends of the workpiece to move away from the respective directions, so that the stretching movement of the workpiece is realized; and various data of the workpiece are recorded in the process of the stretching movement of the workpiece, so that the data are processed to achieve the purpose of testing the performance of the workpiece.

The test piece fixing clamp used by the stretching experiment machine in the laboratory at present is complex in structure, large in mass and volume, poor in applicability to test pieces of various shapes, and prone to causing the phenomenon of slipping of the end part of the test piece, so that the experiment cannot be carried out. Therefore, the above problems need to be solved.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a tensile anchor clamps for experiments in order to solve the problem that test piece mounting fixture structure that tensile experiment machine used is complicated, quality and bulky, easily take place test piece tip slippage phenomenon, provide a tensile anchor clamps for experiments.

A clamp for a tensile experiment comprises a base and N clamping mechanisms; n is an integer greater than or equal to 2;

the base is of a cylindrical structure, a plurality of threaded holes are formed in the side wall of the base, and all the threaded holes are uniformly distributed in the circumferential direction of the base; each threaded hole on the base corresponds to one clamping mechanism;

one end face of the base is fixedly connected with the driving end of the tensile testing machine;

each clamping mechanism comprises a screw, a first nut, a second nut, a clamping piece and an internal thread cylinder;

one end of the internal thread cylinder is fixedly connected with the bottom surface of the clamping piece, and the internal thread cylinder and the clamping piece are integrated;

the screw rod is in threaded connection with the threaded hole in the base and penetrates through the side wall of the base; the first nut and the second nut are screwed on the screw rod, the first nut is positioned on the outer side of the side wall of the base, and the second nut is positioned on the inner side of the side wall of the base; the internally threaded barrel is screwed on the free end of the screw.

Preferably, the radial cross-section of the base is circular or regular polygonal.

Preferably, the top surface of the clamping piece is used as a clamping surface, the surface of which is provided with anti-slip corrugations.

Preferably, the clamping piece is of a flat, curved or V-shaped configuration.

The beneficial effects who brings are, an anchor clamps for tensile experiments simple structure, the dismouting of being convenient for, small, light in weight and can press from both sides tightly the tip of elongated shape structure's test piece, and the cross-section of elongated shape structure's test piece can be to arbitrary structures such as circular, polygon to can adjust the bore of centre gripping wantonly, the flexible operation is convenient for realize. Realize locking the screw rod and the tight piece of clamp of screw rod free end through first nut and second nut, effectually avoided the emergence of test piece tip slippage phenomenon.

Drawings

Fig. 1 is a schematic front view of a tensile test fixture according to the present invention;

FIG. 2 is a side view of a tensile test fixture;

FIG. 3 is a schematic diagram of three structures of the clamping mechanism 2; wherein the content of the first and second substances,

FIG. 3(a) is a schematic view of the overall structure of the clamping mechanism 2 when the clamping pieces 2-4 are in a flat plate type structure;

FIG. 3(b) is a schematic view of the overall structure of the clamping mechanism 2 when the clamping pieces 2-4 are in an arc-shaped structure;

fig. 3(c) is a schematic view of the entire structure of the clamping mechanism 2 when the clamping pieces 2-4 are in the V-shaped structure.

Fig. 4 is a schematic structural view of the tensile test jig when the number of the clamping mechanisms 2 is 4 and the radial cross section of the base 1 is circular.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict.

Referring to fig. 1, 2 and 4, the present embodiment is described, which is a clamp for a tensile test, and includes a base 1 and N clamping mechanisms 2; n is an integer greater than or equal to 2;

the base 1 is of a cylindrical structure, a plurality of threaded holes are formed in the side wall of the base 1, and all the threaded holes are uniformly distributed in the circumferential direction of the base 1; each threaded hole on the base 1 corresponds to one clamping mechanism 2;

one end face of the base 1 is fixedly connected with a driving end of the tensile testing machine;

each clamping mechanism 2 comprises a screw rod 2-1, a first nut 2-2, a second nut 2-3, a clamping piece 2-4 and an internal thread cylinder 2-5;

one end of the internal thread cylinder 2-5 is fixedly connected with the bottom surface of the clamping piece 2-4, and the two are integrated;

the screw 2-1 is in threaded connection with the threaded hole in the base 1 and penetrates through the side wall of the base 1; the first nut 2-2 and the second nut 2-3 are screwed on the screw rod 2-1, the first nut 2-2 is positioned on the outer side of the side wall of the base 1, and the second nut 2-3 is positioned on the inner side of the side wall of the base 1; the internal thread cylinder 2-5 is screwed on the free end of the screw 2-1.

During assembly, the first nut 2-2 is screwed on the screw rod 2-1, then the free end of the screw rod 2-1 penetrates through the side wall of the base 1 and extends into the base 1 through a threaded connection mode of the screw rod 2-1 and a threaded hole of the base 1, then the second nut 2-3 is screwed on the screw rod 2-1, the first nut 2-2 and the second nut 2-3 are respectively positioned on two sides of the side wall of the base 1, then the internal thread cylinder 2-5 is screwed on the free end of the screw rod 2-1, the clamping piece 2-4 is fixed at the free end of the screw rod 2-1, assembly of one clamping mechanism 2 is completed, and the clamping piece 2-4 is used for clamping the end part of a test piece.

When a tensile experiment is carried out, the end part of a test piece is fixed and clamped by the clamping pieces 2-4 of the assembled clamping mechanisms 2, the length of the screw 2-1 extending into the cavity in the base 1 is adjusted, the fastening degree of the test piece is adjusted, after the fastening is finished, the first nut 2-2 and the second nut 2-3 are screwed, the first nut 2-2 and the second nut 2-3 are enabled to abut against the side wall of the base 1, the locking of the screw 2-1 is realized, the base 1 and the screw 2-1 are prevented from being disengaged, the locking of the screw 2-1 and the clamping piece 2-4 at the free end of the screw 2-1 is realized, the clamping of the test piece is finished, the tensile experiment is carried out, after the tensile experiment is finished, the first nut 2-2 and the second nut 2-3 are firstly screwed, and the screw 2-1 is fixed, the first nut 2-2 and the second nut 2-3 are far away from the side wall of the base 1, then the screw 2-1 is screwed, the screw 2-1 moves relative to the base 1, and the screw 2-1 is continuously far away from the base 1, so that the end part of the test piece is released.

A anchor clamps for tensile experiments simple structure, the dismouting of being convenient for, small, light in weight and can press from both sides tightly, and the cross-section of elongated structure's test piece can be to arbitrary structures such as circular, polygon to the tip of elongated structure's test piece to can adjust the bore of centre gripping wantonly, the flexible operation is convenient for realize. The screw rod 2-1 and the clamping piece 2-4 at the free end of the screw rod 2-1 are locked through the first nut 2-2 and the second nut 2-3, and the phenomenon of slipping of the end part of a test piece is effectively avoided.

Further, the radial section of the base 1 is circular or regular polygonal.

Furthermore, the top surface of the clamping pieces 2-4 serves as a clamping surface, the surface of which is provided with anti-slip corrugations.

Further, with particular reference to FIG. 3, the clamping tabs 2-4 are of a flat, arcuate or V-shaped configuration.

In the preferred embodiment, the clamping pieces 2-4 are flat plate type, arc type or V type structures, the clamping pieces 2-4 of the flat plate type structure are suitable for clamping a test piece of the flat plate type structure, the clamping pieces 2-4 of the arc type structure are suitable for clamping a cylindrical test piece, and the clamping pieces 2-4 of the V type structure are suitable for clamping a prismatic column.

Although the invention herein has been described with reference to particular embodiments, it is to be understood that these embodiments are merely illustrative of the principles and applications of the present invention. It is therefore to be understood that numerous modifications may be made to the illustrative embodiments and that other arrangements may be devised without departing from the spirit and scope of the present invention as defined by the appended claims. It should be understood that features described in different dependent claims and herein may be combined in ways different from those described in the original claims. It is also to be understood that features described in connection with individual embodiments may be used in other described embodiments.

Claims (4)

1. The clamp for the tensile experiment is characterized by comprising a base (1) and N clamping mechanisms (2); n is an integer greater than or equal to 2;

the base (1) is of a cylindrical structure, a plurality of threaded holes are formed in the side wall of the base (1), and all the threaded holes are uniformly distributed in the circumferential direction of the base (1); each threaded hole on the base (1) corresponds to one clamping mechanism (2);

one end face of the base (1) is fixedly connected with the driving end of the tensile testing machine;

each clamping mechanism (2) comprises a screw (2-1), a first nut (2-2), a second nut (2-3), a clamping piece (2-4) and an internal thread cylinder (2-5);

one end of the internal thread cylinder (2-5) is fixedly connected with the bottom surface of the clamping piece (2-4), and the internal thread cylinder and the clamping piece are integrated;

the screw rod (2-1) is in threaded connection with a threaded hole in the base (1) and penetrates through the side wall of the base (1); the first nut (2-2) and the second nut (2-3) are screwed on the screw (2-1), the first nut (2-2) is positioned on the outer side of the side wall of the base (1), and the second nut (2-3) is positioned on the inner side of the side wall of the base (1); the internal thread cylinder (2-5) is screwed at the free end of the screw (2-1).

2. A tensile experimental clamp according to claim 1, wherein the base (1) has a circular or regular polygonal radial cross-section.

3. A tensile test fixture according to claim 1, wherein the top surfaces of the clamping pieces (2-4) are provided as clamping surfaces, the surfaces of which are provided with anti-slip corrugations.

4. A tensile experimental clamp according to claim 1, wherein the clamping pieces (2-4) are of a flat plate type, an arc type or a V type structure.

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