Clamp for high-temperature low-cycle fatigue test

Abstract

The invention discloses a high-temperature low-cycle fatigue test fixture which comprises a chuck body, a piston capable of reciprocating in the chuck body, a connecting rod capable of extending into a high-temperature environment, an ejector rod slidably arranged in the connecting rod and a cooling device, the chuck body is in sealed communication with one end of the connecting rod, and the other end of the connecting rod is connected with a sample connecting piece; a sample piece can penetrate through the sample connecting piece to be in contact with the ejector rod, one end of the piston is communicated with an oil cavity of the chuck body, the other end of the piston is connected with the ejector rod, the periphery of the piston is in sealed connection with an inner cavity of the chuck body, the chuck body is provided with a channel used for supplying hydraulic oil into the oil cavity, and the cooling device can be arranged in the circumferential direction of the chuck body. By using the clamp for the high-temperature low-cycle fatigue test, provided by the invention, a thread gap between the clamp and a material piece can be effectively eliminated in a high-temperature environment and in a mounting process.

Description

technical field [0001] The invention relates to the technical field of structural performance detection of mechanical parts, and more specifically relates to a fixture for high-temperature and low-cycle fatigue tests. Background technique [0002] With the development of science and technology, many new materials have been developed continuously, especially in important fields such as aerospace, more new materials have been applied, but the performance of new materials must be tested by testing machine equipment, that is, it needs Under high temperature fatigue test conditions, the mechanical properties of materials can be effectively tested. Therefore, when performing high-temperature fatigue tests, the design of the fixture plays a decisive role in the test results. If the performance of the fixture is excellent, the detection accuracy of the mechanical properties of new materials can be greatly improved. [0003] In the prior art, mechanical clamps are usually used to cl...

AI Technical Summary

Problems solved by technology

[0003] In the prior art, mechanical clamps are usually used to clamp the material parts, that is, the connection between the clamp and the material parts needs to be realized through the operation of tightening the nuts, but the process of tightening the nuts will affect the coaxiality of the material parts. And there is a thread gap between the fixture and the material part, which cannot be effectively eliminated in the high temperature environment and during the installation process, which will lead to the failure of the clamping effect of the fixture, and will eventually affect the test accuracy of the material part

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