Resistance strain gauge bonding and calibration method capable of measuring contact pressure of disc friction pair

Abstract

The invention discloses a resistance strain gauge bonding and calibration method capable of measuring the contact pressure of a disc friction pair. The method includes the following steps that: the characteristics of the external support structure of the friction pair are analyzed, the size and layout of blind holes and the measuring range of resistance strain gauges are determined; based on the locations of the blind holes, resistance strain gauge bonding and lead connection are carried out, and the initial resistance values of the resistance strain gauges at each measurement point are measured, and whether the bonded resistance strain gauges are normal is judged; a calibration test-bed is built, and signal acquisition is carried out; and fitting processing is carried out based on the data of the measuring points, so that the calibration values of the resistances of the measuring points can be obtained. According to the method of the invention, the measurement of the strain of dual discs can be realized with loading pressure known; the values of the strain gauges at the measurement points are different due to bonding angles and accidental factors, if a pressure loading experiment is carried out directly, a lot of errors can be brought out, and therefore, a calibration experiment can provides a basis for the correction of the dynamic and static pressure distribution measurement data of friction sheets. The calibration method of the invention has the advantages of simplicity, quickness and operational easiness.

Description

technical field [0001] The invention belongs to the technical field of stress and strain measurement on contact surfaces of friction pairs of brakes in the transmission field of crawler vehicles, and in particular relates to a bonding and calibration method of resistance strain gauges for measuring the contact pressure of disc friction pairs. Background technique [0002] High energy density friction transmission system is the key to high performance transmission. Its distinctive features are high power and high speed. The friction pair is widely used in the transmission field of tracked vehicles due to its excellent wear resistance and high heat capacity. Cu-based and Fe-based powder metallurgy friction pairs, including brakes and clutches, work in a multi-stress compound environment. As the three-parameter boundary-pressure, speed, and temperature are the main factors affecting the friction characteristics of the friction pair, and they are also the key factors in the desig...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is: in order to solve the measurement error caused by the loss of the resistance strain gauge and the radial sticking error under the condition of high speed and heavy load in the prior art, a method for measuring the contact of the disc friction pair is provided. Pressure resistance strain gauge pasting and calibration method, this method effectively solves the above problems, and lays the foundation for the subsequent on-site pressure measurement of the pair

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