RTCP (real-time transport control protocol) based geometrical error identification methods for swing shafts of five-axis numerical control machine tool

Abstract

The invention discloses RTCP (real-time transport control protocol) based geometrical error identification methods for swing shafts of a five-axis numerical control machine tool. The geometrical error identification methods comprise a geometrical error identification method for a C swing shaft. The geometrical error identification method for the C swing shaft comprises the following steps: S1, an A swing shaft is kept still and the motion trail of the C swing shaft is set; S2, the position error a ball head detection tool center is detected and combined with a C swing shaft geometrical error model, and a C swing shaft geometrical error identification equation system of the ball head detection tool center is established; S3, geometrical offset parameters of the ball head detection tool center are adjusted repeatedly, a plurality of C swing shaft identification equation systems are obtained, and a hyperstatic linear equation system about C swing shaft geometrical error terms and of the ball head detection tool center is formed; S4, the equation system is solved with a least square method, and various geometrical errors of the C swing shaft are obtained. According to embodiments, the geometrical error identification methods for the swing shafts of the five-axis numerical control machine tool are comprehensive.

Description

technical field [0001] The invention relates to the field of mechanical instrument design and machine tool detection, in particular to an RTCP-based method for identifying the geometric error of a swing axis of a five-axis numerically controlled machine tool. Background technique [0002] With the rapid development of my country's aerospace and automobile manufacturing industries, multi-axis linkage CNC machine tools are widely used in the processing of various complex parts. When multi-axis CNC machine tools are applied to the processing of complex parts, there are two hot issues in terms of geometric accuracy assurance: (1) In order to meet the machining accuracy requirements of complex parts, it must be ensured that the multi-axis CNC machine tools used have sufficient initial geometric accuracy. precision. (2) When the multi-axis CNC machine tool is applied to the processing of parts, the accuracy of the machine tool will decrease with the passage of time. For this rea...

AI Technical Summary

Problems solved by technology

When multi-axis CNC machine tools are applied to the processing of complex parts, there are two hot issues in terms of geometric accuracy assurance: (1) In order to meet the machining accuracy requirements of complex parts, it must be ensured that the multi-axis CNC machine tools used have sufficient initial geometric accuracy. precision

(2) When the multi-axis CNC machine tool is applied to the processing of parts, the accuracy of the machine tool will decrease as time goes by

However, the geometric error related to the angular position of the oscillating axis (for simplicity of description, if there is no special explanation, the geometric error in this application refers to the geometric error related to the angular position of the oscillating axis) as another important influence affecting the machining accuracy of the machine tool factors, whose systematic and comprehensive identification methods are still to be developed

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