Four-point bending test clamp

Abstract

The invention discloses a four-point bending test clamp used for measuring the bending performance of test pieces, and the four-point bending test clamp is detachably installed on an universal tester or a press for four-point bending experiments. The four-point bending test clamp comprises a supporting part and a loading part; the upper surface of a bottom plate in the supporting part is provided with multiple second screwed hole groups arranged along the length direction of a test piece at equal intervals, and two adjustable bearers are adjusted by the screwed hole groups for adjusting the distance between the two adjustable bearers and further for adjusting the span between two supporting rollers; at least two first screwed hole groups are arranged along the length direction of the test piece at equal intervals and at each of the two sides of the surface facing to the test piece of a loading main body in the loading part; and a pressing roller unit employs screws corresponding to the first screwed hole group for selective screwing with screwed holes and further for adjusting the span between the two supporting rollers. The provided four-point bending test clamp installed on the universal tester or the press for measuring the bending performance of the test piece has the characteristics of being simple in structure and convenient to dismount and mount while helping to guarantee the test precision.

Description

technical field [0001] The invention relates to a fixture, in particular to a four-point bending test fixture for measuring the bending performance of a test piece. Background technique [0002] The four-point bending test is used to measure the characteristic parameters such as yield strength and elastic modulus of non-metallic materials and metal materials, and is one of the basic methods for testing the mechanical properties of materials. Usually the four-point bending test needs to be carried out on a four-point bending universal testing machine. Although the four-point bending universal testing machine is widely used in the engineering field, the four-point bending universal testing machine has a single function, high cost, and requires a certain amount of space. Economical is not strong. Since the universal testing machine or press has the same basic structure and working principle as the four-point bending universal testing machine, the four-point bending test can al...

AI Technical Summary

Problems solved by technology

Due to the fixed structure of the workbench, the current universal testing machine or press cannot perform a four-point bending test. Therefore, the prior art lacks a four-point bending test fixture installed on a universal testing machine or a press to measure the bending performance of a specimen.

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