A centering jig used for plate type test piece of testing machine

Abstract

The invention relates to the field of static force and fatigue test of materials, in particular to a centering clamp for a plate type test piece of a test machine. The centering clamp comprises an upper positioning rod and a lower positioning rod which are arranged in parallel, an intermediate rod, an upper sleeve and a lower sleeve which are arranged on the intermediate rod in a sleeving and sliding manner, two upper clamping heads and two lower clamping heads which are respectively arranged on the bottom surface of the upper positioning rod and the top surface of the lower positioning rod ina sliding manner, two upper supporting arms and two lower supporting arms which are connected with the clamping heads and the sleeves, and two clamping head sliding blocks which are arranged on the top surface of the upper positioning rod or the bottom surface of the lower positioning rod in the sliding manner and are fixedly clamped on the two sides of clamping heads, on the corresponding sides,of the test machine. According to the centering clamp for the plate type test piece of the test machine provided by the invention, the sleeves are connected with the supporting arms with equal lengths; when the sleeves move, the left supporting arm and the right supporting arm move synchronously and the distances are the same, so that the centre of a test piece and the centre of the clamp are aligned when the test piece is clamped; therefore, the centre of the test piece is aligned with the centre of the test machine; the centering clamp for the plate type test piece of the test machine is easy and convenient to mount, time-saving and labour-saving, and independent of technology and experience of an operator.

Description

technical field [0001] The invention relates to the field of material static force and fatigue test, in particular to a centering fixture used for a plate-type test piece of a testing machine. Background technique [0002] In the process of aircraft development, it involves the design, development and application of many materials, processes, and structural forms, and it is necessary to master their material properties, process properties, and structural properties through experimental means. At present, it is a mature and reliable method to use testing machine to carry out such tests. During the test, a large number of plate-type test pieces need to be tested. The test pieces are clamped on the testing machine by the chuck of the testing machine, and then related tests such as static force and fatigue are carried out. [0003] Since the test piece is a plate type, the centerline of the test piece should be aligned with the centerline of the testing machine during installat...

AI Technical Summary

Problems solved by technology

[0004] The object of the present invention is to provide a kind of centering fixture for testing machine plate type test piece, to solve at least one problem that existing testing machine plate type test piece fixture exists

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