A grating ruler reliability test bench and a reliability test method based on load spectrum

Abstract

The present invention relates to a grating scale reliability testing stand and a reliability test method based on a load spectrum, and belongs to a testing device applied to the machinery field. The grating scale reliability testing stand comprises a grating scale main scale installing plate, support blocks, reading head installing plates, towing chains, linear motors, a sliding plate, grating scale main scales, reading heads, base plates and three-directional acceleration sensors. The present invention provides a reliability test method based on a velocity spectrum and an acceleration spectrum. Regulation can be performed according to concrete requirements of a test, such as regulation of an instantaneous velocity, an instantaneous acceleration, an average velocity and an average acceleration of a linear motor and a motion rule curve thereof; the grating scale is tested through simulation of the velocity load and the acceleration load, the velocity spectrum and the acceleration spectrum are complied according to the velocity load and the acceleration load in actual operation of the grating scale, the reliability test based on the velocity spectrum and the acceleration spectrum canreally reflect the velocity load and the acceleration load of the grating scale in the actual operation, and various types of enclosed grating scale reliability tests can be satisfied.

Description

technical field [0001] The invention relates to a test device applied in the mechanical field, more precisely, the invention relates to a reliability test device capable of applying velocity and acceleration loads to a grating ruler and a reliability test method based on the velocity spectrum and the acceleration spectrum. Background technique [0002] Grating ruler is a measuring device that converts mechanical displacement or analog quantity into digital pulse. It works by using the optical principle of grating. It has the advantages of high measurement accuracy, non-contact, small size and flexible measurement range. It is widely used in CNC machine tools, Robots and other industrial equipment. [0003] At present, CNC machine tools, especially medium and high-end CNC machine tools, widely use grating scales as an important position information feedback element for full-closed-loop control in the feed system. Therefore, the reliability level and accuracy retention of grat...

AI Technical Summary

Problems solved by technology

[0004] At present, there are few researches on the reliability test of grating scale in China, especially the research on the speed and acceleration load test it bears. Although there are some studies on the reliability test of grating scale, they mainly focus on the environmental load borne by the grating scale. Research, there is a lack of research on the velocity and acceleration loads that the encoder is subjected to

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