Device and method for testing normal static characteristics of junction surface of high-strength bolt

Abstract

The invention discloses a device and a method for testing normal static characteristics of a junction surface of a high-strength bolt. The device for testing the normal static characteristics of the junction surface of the high-strength bolt comprises a material testing machine, two screws, a lower test piece, an upper test piece, the high-strength bolt, a slotless locating support, a slotted locating support, an eddy current displacement sensor, a force sensor, a dynamic strain indicator, a modal testing system and a personal computer (PC) machine. The high-strength bolt penetrates through the upper test piece and the lower test piece in a vertical mode so that the upper test piece and the lower test piece are mutually attached to form the junction surface, and a strain gage is embedded in the high-strength bolt. The eddy current displacement sensor is used for measuring the normal displacement variable quantity of the junction surface. The upper test piece and the lower piece are respectively connected with the material testing machine through the two screws. The material testing machine carries the force sensor and exerts static tensile force on the upper test piece and the lower test piece along the longitudinal direction. The dynamic strain indicator for measuring the pretightening force and a strain signal of the high-strength bolt, the eddy current displacement sensor for measuring the normal displacement variable quantity of the junction surface, and the force sensor for measuring a static force signal output self-signals to the modal testing system, and then the signals are transmitted to the PC machine.

Description

technical field [0001] The invention relates to a device and a method for testing the normal static characteristic of a joint surface of a high-strength bolt, belonging to the field of mechanical design and manufacture. Background technique [0002] As we all know, machine tools and even all kinds of machinery are generally not a continuous whole in order to meet various functions, performance, processing requirements and transportation convenience, but are combined by various parts according to certain specific requirements. The contact surface between parts, components, and parts is called "mechanical joint surface", referred to as "joint surface", or "contact surface". Parts, components, and components that are in contact with each other are called joints, and joints can be divided into joint surfaces and connected parts. The connected parts are the parts of the joint except the joint surface, such as Figure 10 shown. Due to the large number of joint surfaces in the mec...

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Problems solved by technology

[0013] 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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