Method for detecting geometrical motion error of triaxial numerical control equipment

Abstract

The invention discloses a method for detecting the geometrical motion error of triaxial numerical control equipment in the technical field of mechanical detection. In accordance with the characteristic that a plane grating can measure the linear motion error and the circular motion error of the triaxial numerical control equipment, the method separates 12 error components including the linear error, the position error and the vertical error of a guide rail X, a guide rail Y and a guide rail Z, and then separates 9 rotation angle error components of the three guide rails.

Description

technical field [0001] The invention relates to a method in the technical field of mechanical detection, in particular to a method for detecting geometric motion errors of three-axis numerical control equipment. Background technique [0002] The geometric motion accuracy of three-axis CNC equipment (including three-axis CNC machining centers, three-coordinate measuring machines, etc.) is an important indicator for evaluating its performance, which directly affects the machining (or detection) accuracy, service life and production cost of the workpiece. Improving the geometric motion accuracy of three-axis CNC equipment is the development requirement of the machinery manufacturing industry, and the level of motion accuracy is measured by the size of motion error. Therefore, the measurement of motion error is a key technology in the manufacture and maintenance of CNC equipment. Equipment manufacturers can use the geometric accuracy test results of machine tools or coordinate m...

AI Technical Summary

Problems solved by technology

However, this technology has the following disadvantages: due to the friction between the steel ball and the magnetic recess, the motion accuracy of the measured machine tool is unstable when the feed speed is higher than 10m / min; it can only be measured along the direction of the circular interpolation radius; Due to the deformation of the telescopic rod due to its own weight, the comprehensive measurement accuracy is difficult to reach the micron level; the least square method is used to identify each error component, but the solution is not unique due to the non-full rank of the matrix

However, the problems of this technology are: the installation and light alignment process is troublesome, which affects the measurement accuracy; the laser intensity is easily affected by the surrounding environment; The problem that the solution is not unique due to the non-full rank of the matrix

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