Multi-axis numerical control machining post-processing method considering structural error of machine tool

Abstract

The invention provides a multi-axis numerical control machining post-processing method considering a structural error of a machine tool. The method comprises the following steps of: respectively establishing a machine tool motion transformation chain containing no structural error and a machine tool motion transformation chain containing the structural error according to the structure of the machine tool, wherein the machine tool motion transformation chain containing no structural error is used for figuring out ideal motion coordinate of each motion axis of tool motion and the structural error of the machine tool is not taken into consideration in the ideal motion coordinate; and then figuring out the compensating quantity of the ideal motion coordinate by using the machine tool motion transformation chain containing the structural error; and enabling the offset between an actual motion track and a set motion track of the machine tool to fall within an allowed range through compensating the ideal motion coordinate so that the consistency between the actual track and the set track of the tool is assured. According to the invention, the shortcomings in the traditional post-processing method are made up; the multi-axis post-processing containing geometrical structure error of the machine tool can be realized so that the multi-axis numerical control machining post-processing method is helpful to improve the motion precision in the processing process of the machine tool and improve the processing quality of the parts.

Description

Technical field: [0001] The invention relates to the field of multi-axis numerical control machining, in particular to a post-processing method for multi-axis numerical control machining. Background technique: [0002] With the development of industries such as national defense, transportation, and energy, there is a higher demand for the processing and manufacturing of key functional parts such as ship propellers, aircraft inlets, and wind turbine blades. The shape and working surface of this kind of parts are complex, and it is difficult to achieve the ideal precision with three-axis CNC machining machine tools, or even impossible to process. Multi-axis CNC machine tools must be used to complete the processing. [0003] In five-axis CNC machining, the main task of post-processing is to convert the source file of machining tool position trajectory generated by CAM software into the NC code acceptable to a specific machine tool. At present, the usual post-processing algorith...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to address the current existing problems and provide a multi-axis CNC machining post-processing method that considers machine tool structural errors. By considering the position and attitude deviation between the moving parts of the machine tool, the G code obtained by post-processing Compensate the movement coordinates of each axis in the machine tool, eliminate the error caused by the position and attitude deviation between the moving parts of the machine tool to the tool movement track, improve the movement accuracy of the machine tool tool, and meet the processing quality requirements of the parts

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