Torsional clamp used on tensile testing machine

Abstract

The invention discloses a torsional clamp used on a tensile testing machine, which comprises a torsion power module, a clasping device module, a hydraulic pushing structure and a clamp module. The clamp module is upper and lower coaxially and fixedly arranged on a machine chuck, and comprises a clamp body arranged in a vertical direction, a chuck pushing rod arranged inside the clamp body and a collect chuck used for clamping the test piece. A hydraulic pushing structure is fixedly connected with the clamp body and acts on the chuck pushing rod through a piston rod arranged coaxially, the clamp body is rotatably arranged, the torsion power module is fixed on the beam of the tensile testing machine through an upper support, and transmits power to a large belt wheel through a synchronous toothed belt which is arranged outside the clamp body of the upper part of the clamp module, the clasping device module is arranged outside the clamp body of the lower part of clamp module, and the clasping degree of the clasping device module and the clamp module is adjustable. The torsional clamp used on tensile testing machine is simple in structure, and can realize the separate twisting experiment and the pull and torsion compound experiment.

Description

technical field [0001] The invention belongs to the technical field of material mechanics experiments, in particular to a torsion clamp used on a tensile testing machine. Background technique [0002] Tensile testing machine is a commonly used experimental instrument in the mechanical performance experiment of materials. The mechanical performance parameters of the test piece material are obtained by performing tensile experiments on the tested piece. However, the ordinary tensile testing machine can only perform axial tension of the test piece. However, in actual production, the material is not subjected to tension or compression alone, and the components in actual service are under multi-directional stress, so a single tensile test cannot obtain the effect of the material under multiple forces. The mechanical performance index of the case. [0003] Chinese patent CN102841012A discloses a clamp for tensile and torsion test pieces. The clamp is installed on the beam, and th...

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Problems solved by technology

[0002] Tensile testing machine is a commonly used experimental instrument in the mechanical performance experiment of materials. The mechanical performance parameters of the test piece material are obtained by performing tensile experiments on the tested piece. However, the ordinary tensile testing machine can only perform axial tension of the test piece. However, in actual production, the material is not subjected to tension or compression alone, and the components in actual service are subjected to multi-directional stress states, so a single tensile test cannot obtain the effect of materials under multiple forces. The mechanical performance index of the case

[0003] Chinese patent CN102841012A discloses a clamp for tensile and torsion test pieces. The clamp is installed on the beam, and the power is transmitted to the lead screw through the motor, so that the beam moves up and down to drive the clamp to stretch the test piece, but the realization of its twist requires The fixture is connected coaxially with the output shaft of the torsion motor, and the torque is transmitted through the key to make the specimen torsion; however, the ordinary tensile testing machine has an organic chuck, and the chuck cannot rotate, and there is no torsion motor on the tensile testing machine. It cannot be connected coaxially with the fixture. The fixture is suitable for the multifunctional material mechanics testing machine with tension and compression functions disclosed in Chinese patent CN101625296B, and cannot be used for ordinary tensile testing machines.

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