Device for testing tangential stiffness property of joint surface

Abstract

The invention discloses a device for testing a tangential stiffness property of a joint surface, and belongs to the fields of mechanical design and manufacture. The device consists of a test loading device (1) and a tangential test assembly. An upper test piece (7) is butted with a lower test piece (6), and a gap is reserved at the joint; a pressing plate (3) and a pressing plate (11) are arranged on two surfaces vertical to the test piece butting surface, and are fixedly connected through two high-strength bolts (9) and (11) to form the tangential test assembly; the high-strength bolts (9) and (11) are symmetrical about the gap of the joint of the upper and lower test pieces; brackets (8) and (5) are arranged on two sides of the gap of the joint for accommodating an eddy current displacement sensor (4); and a force sensor (14) for measuring loading force signals and the eddy current displacement sensor (4) for measuring the tangential displacement variation of the joint surface are connected to a signal acquisition system. The device has the advantages of simple machining, convenience for clamping, high universality, high controllability of the parameters and the like.

Description

technical field [0001] The invention discloses a device for testing the tangential rigidity characteristic of a joint surface, which belongs to the field of mechanical design and manufacture. Background technique [0002] Machine tools and all kinds of machinery are combined by various parts according to specific requirements, and the contact surface between components and parts is called "bonding surface". A large number of joint surfaces exist in the mechanical structure, so that the mechanical structure or system no longer has continuity, which leads to the complexity of the problem. There are contact stiffness and contact damping at the joint surface. Many studies have shown that the contact stiffness of the joint surface in the machine tool accounts for about 60% to 80% of the total stiffness of the machine tool, and the contact damping at the joint surface accounts for more than 90% of the total damping of the machine tool. More than 60% of the vibration problems come...

AI Technical Summary

Problems solved by technology

[0012] There are so many influencing factors, and their influencing laws are varied, and some factors affect each other, so it is impossible to directly determine their influencing laws and degree of influence by means of theoretical analysis. method to solve

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