Installation error identification method based on rotating shaft integration error measurement value

Abstract

The invention discloses an installation error identification method based on a rotating shaft integration error measurement value. The method comprises the following steps of step1, taking the intersection point of a workbench rotation C rotation shaft axis and a workbench surface as an original point, and establishing a measured coordinate system; step2, through a measuring instrument, acquiringthe comprehensive error measurement value of the theoretical point and the actual point of the different rotation angles of a point P around a C shaft; step3, extracting the error projection point ofthe comprehensive error measurement value in an XOY measurement coordinate plane, and carrying out plane circle fitting to obtain the displacement error of a C shaft axis; and step4, extracting the error projection points of the comprehensive error measurement value in an XOZ measurement coordinate plane and a YOZ measurement coordinate plane, and carrying out straight line fitting and acquiring the perpendicularity errors of the C shaft, an X shaft and a Y shaft. In the invention, the four installation errors of the rotation shaft of a five-shaft numerical control machine tool can be conveniently, rapidly and accurately acquired, a data reference is provided for the assembling and debugging and the installation error of the rotation shaft of the five-shaft numerical control machine tool,and the method is suitable for all structural types of the five-shaft numerical control machine tools.

Description

technical field [0001] The invention belongs to the technical field of numerical control machining, and in particular relates to a method for identifying an installation error of a rotating shaft based on a comprehensive error measurement value of the rotating shaft. Background technique [0002] Compared with three-axis CNC machine tools, the machining accuracy of five-axis CNC machine tools is more susceptible to various errors (geometric errors, thermal errors, servo control errors, etc.); % or so (Sheng Bohao, Tang Hua. Comprehensive dynamic compensation technology for CNC machine tool errors [J]. Manufacturing Technology and Machine Tools, 1997(6):19-21.); At present, research on the measurement and identification of geometric errors of translation axes of five-axis CNC machine tools It is relatively mature, but the geometric error measurement and identification of the rotating shaft is not yet perfect. [0003] The geometric error of the rotary axis includes six motio...

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Problems solved by technology

[0002] Compared with three-axis CNC machine tools, the machining accuracy of five-axis CNC machine tools is more susceptible to various errors (geometric errors, thermal errors, servo control errors, etc.); % or so (Sheng Bohao, Tang Hua. Comprehensive dynamic compensation technology for CNC machine tool errors [J]. Manufacturing Technology and Machine Tools, 1997(6):19-21.); At present, research on the measurement and identification of geometric errors of translation axes of five-axis CNC machine tools Relatively mature, but the geometric error measurement and identification of the rotating axis is not yet perfect

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