Method for recording friction force of reciprocating type friction testing machine through position information

Abstract

The invention relates to a method for recording friction force of a reciprocating type friction testing machine through position information. The method includes the following specific steps that 1, a feedback object is installed at the designated position of a reciprocating motion platform fixed with a friction test piece, and then the reciprocating motion platform reciprocates; 2, a sensor is installed at the designated position, connected with an upper computer and controlled by the upper computer; when the feedback object on the reciprocating motion platform moves to the preset position corresponding to the sensor, signal information transmitted to the upper computer by the sensor is identical with preset information of the upper computer, and a control program acquires friction force data of the friction test piece to the upper computer. The problems that a fixed-period friction force data acquisition method is large in friction force data deviation, instable and large in data size can be effectively solved by judging the position information of the friction test piece and recording the friction force data of the reciprocating friction testing machine at the preset position.

Description

technical field [0001] The invention relates to a method for recording the friction force of a reciprocating friction testing machine through position information. Background technique [0002] The reciprocating friction testing machine is a commonly used equipment in the current friction experiment. The friction coefficient of the sample surface is judged by collecting friction data. It has the advantages of simple structure, adjustable stroke, adjustable position, and saving test materials. Due to the reciprocating friction testing machine based on the cam or crank structure, its motion speed conforms to the sinusoidal periodic change, the relative motion between the friction specimen and the dual specimen includes all speed values ​​from static to the highest linear speed, and the friction force corresponding to different speeds They are often different. In the process of changing direction, there will be zero friction force and maximum static friction force. The existing...

AI Technical Summary

Problems solved by technology

Due to the reciprocating friction testing machine based on the cam or crank structure, its motion speed conforms to the sinusoidal periodic change, the relative motion between the friction specimen and the dual specimen includes all speed values ​​from rest to the highest line speed, and the friction force corresponding to different speeds They are often different. In the process of changing direction, there will be zero friction and maximum static friction. The existing friction collection method is generally through the method of fixed period collection, resulting in the collected friction will be too large or too small Or problems such as poor stability and large data volume

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