A detachable multi-level elastic stress monolithic magnetic performance test fixture

Abstract

The invention discloses a detachable multi-shift elastic stress single sheet flange magnetic property testing clamp, comprising a main frame support, a main frame support cover plate, a fixed clamp plate at the testing sample end part and a flexible clamp head as well as a flexible clamp plate, a spring base, and a compression spring. The main frame support is provided with a plurality of different installation holes; and the interval distances among the installation holes match the stiffness coefficient of the compression spring. The left side main frame support and the right side main frame support penetrate from the two sides of the sample placing position and are fastened through the bolt at the front end. The lower main frame support is assembled to the left side main frame support and the right side main frame support through different bolt holes at the distal end; and the other end of the sample is at the front end part of the left side main frame support and the right side main frame support and is pressed tight by bolts through the use of the fixed clamp plate. The flexible clamp plate and the flexible clamp head clamp the other end of the sample. The distal end of the flexible clamp head penetrates the lower main frame support and is assembled to the spring base. The testing clamp of the invention can conveniently realize the loading of multiple horizontal elastic stresses. Through the friction force, the sample ends are clamped tight. Without opening holes at the sample end parts, the testing clamp can work conveniently and quickly.

Description

technical field [0001] The present invention relates to the technical field of magnetic performance testing of ferromagnetic materials, in particular to a detachable multi-level elastic stress monolithic magnetic performance testing fixture, a fixture for monolithic magnetic performance testing, and elastic stress to characterize residual stress effect on the magnetic properties of the sample. Background technique [0002] Energy saving and environmental protection are one of the themes in the development of the automobile industry in the world today. With the wide application of motors in new energy vehicles, the electromagnetic properties of the core components of motor stators and rotors have received more and more attention. The motor stator is in an alternating external magnetic field, and the change of its magnetized magnetic induction intensity B will lag behind the change of the external magnetic field intensity H, which is commonly referred to as hysteresis. From ...

AI Technical Summary

Problems solved by technology

Although there is currently a test method that can test residual stress online, there are still some problems: on the one hand, the online test equipment usually only has a range of 50-70MPa, while the actual residual stress introduced by punching of electrical steel is as high as 200-300MPa, Therefore, general online test equipment cannot meet our testing needs; on the other hand, online test equipment is usually more complicated and expensive

[0004] After searching the existing patents, it is found that there is currently no relevant fixture suitable for single-chip testing that can provide different levels of elastic stress

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