A method for five-axis linkage interpolation error compensation

Abstract

The invention relates to a method for interpolation error compensation of five-axis linkage. The method comprises that parts are mounted on a workbench of a machine tool, and a meter is mounted at the center of a main shaft of the machine tool; the main shaft is moved to a position to be processed; metering is carried out along the direction of the main shaft, the meter moves along the processed contour of the components, and axial and circumferential deviation of a movement path of the meter relative to the processed contour is measured; and the compensation value of the deviation value in a planar coordinate system is calculated, and compensated to a numerical control program of the machine tool. According to the method, metering detection is carried out on the deviation of the main shaft in different spatial positions, the deviation is projected to the planar coordinate system to compensate and process the coordinate system, linkage interpolation errors that cannot be directly measured or predicted / discovered by an operate are changed into visual planar coordinate compensation values, errors of the compensation space are calculated, interpolation errors are eliminated, part processing is prevented from errors, and the qualified rate of the parts is improved.

Description

technical field [0001] The invention relates to the field of mechanical manufacturing, in particular to a method for compensation of five-axis linkage interpolation errors. Background technique [0002] With the continuous development of the machinery industry, the manufacturing industry has continuously improved the requirements for the machining accuracy of parts, and the structure of parts has become increasingly complex. In this way, the frequency of using five-coordinate machining centers in the manufacturing process is getting higher and higher, which also puts forward high requirements for equipment accuracy. Especially in aviation products, the dimensional accuracy and position accuracy of the part space mechanism reach 0.005mm-0.025mm. Such high-precision dimensions and technical requirements need to overcome the machining errors caused by the machine tool’s own mechanical errors, repeated positioning errors, and machine center number errors. The mechanical error of...

AI Technical Summary

Problems solved by technology

[0002] With the continuous development of the machinery industry, the manufacturing industry has continuously improved the requirements for the machining accuracy of parts, and the structure of parts has become increasingly complex. In this way, the frequency of using five-coordinate machining centers in the manufacturing process is getting higher and higher, which also puts forward high requirements for equipment accuracy. Especially in aviation products, the dimensional accuracy and position accuracy of the part space mechanism reach 0.005mm-0.025mm. Such high-precision dimensions and technical requirements need to overcome the machining errors caused by the machine tool’s own mechanical errors, repeated positioning errors, and machine center number errors. The mechanical error of the machine tool itself can be compensated by measuring the deviation values ​​of the X-axis, Y-axis, and Z-axis of the machine tool respectively, but since the angle and position of the tool in the five-axis linkage are ever-changing, there will be linkage every time the position is changed. Interpolation errors, repeated positioning errors and linkage interpolation errors cannot be directly discovered and eliminated during processing, resulting in unqualified parts processing and affecting use

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