Load test fixture for multi-size nuts

Abstract

A load-holding test fixture for multiple specifications of nuts comprises a base connected with an universal tester, a limiting frame mounted on the base and a plurality of supports and a transmissionsystem mounted on the limiting frame, wherein the multiple supports are symmetrically arranged on the base, and used for perpendicularly placing a testing nut; a bolt pressure head is mounted in a threaded hole of the testing nut, a bolt adapter is mounted on the bolt pressure head, the universal tester is mounted on the bolt adapter in a matched mode, a plurality of fastening nuts are mounted onthe universal tester in a matched mode, and the fastening nuts are used for completing dismounting and mounting of the pressure head on the upper portion. In the process of a large-batch nut load-holding test, the upper pressure head can be replaced rapidly and conveniently, the lower supporting base does not need to be replaced, the problem that the test fixture is replaced frequently is solved,and the nut load-holding test efficiency is improved greatly.

Description

technical field [0001] The invention relates to a test fixture, in particular to a load-holding test fixture for multi-standard nuts. Background technique [0002] At present, the nut load test is an important test index in the nut performance test link. By using a special test fixture to apply a standard force value to the test nut, and after a certain period of time, the force is unloaded and the integrity of the nut thread is detected. sex. According to the characteristics of the nut load test, the common nut load test fixture is generally composed of an upper indenter and a grooved base, but during the test, it has the following problems: [0003] First, the structure is simple and the structure is single; [0004] Second, because the thread of the upper indenter is easy to wear and damage after long-term use, the upper indenter needs to be manufactured irregularly for post-maintenance. Therefore, the post-maintenance cost is high; [0005] Third, because nuts of diff...

AI Technical Summary

Problems solved by technology

[0008] The main purpose of the present invention is to overcome the above-mentioned shortcomings existing in the prior art, and to provide a load-holding test fixture for nuts with multiple specifications, which not only can replace the upper pressure head quickly, but also support the lower part during the load-holding test of a large number of nuts. The base does not need to be replaced, which solves the problem of frequent replacement of test fixtures and greatly improves the efficiency of the nut load test; moreover, it does not need to design, process and maintain the upper indenter, which greatly reduces production costs and improves economic benefits

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