Cutter attitude optimization method for geometric error compensation of five-axis machine tool

Abstract

The invention provides a cutter attitude optimization method for geometric error compensation of a five-axis machine tool. The method comprises the following steps: establishing an angle coordinate representation form of a cutter attitude; establishing a conversion relationship between the angle coordinates of the cutter attitude and a tool attitude vector; establishing a five-axis machine tool cutter position geometric error model; obtaining cutter location point information, and setting the initial value of i to be 1; optimizing the tool posture of the ith tool location point by applying a chicken flock optimization algorithm to obtain an optimal angle coordinate of the tool posture of the ith tool location point; obtaining an optimal tool posture of the ith tool location point, and obtaining a compensation machining code of the ith tool location point according to a five-axis machine tool post-processing program; and adding 1 to i, judging whether the value of i is greater than thenumber n of cutter location points, and if so, outputting a compensation processing code as a geometric error compensation result. The method can effectively solve the problem of realizing compensation geometric errors of workpiece texture constraints from a tool contact track representing workpiece textures.

Description

technical field [0001] The invention belongs to the technical field of numerical control machining error compensation, and in particular relates to a tool attitude optimization method for geometric error compensation of a five-axis machine tool. Background technique [0002] Five-axis machine tools are widely used in various fields such as aerospace, aviation, navigation, automobiles, and national defense. Five-axis machine tool processing has become one of the important symbols to measure a country's advanced manufacturing level. Geometric error and thermal error are one of the main error sources affecting the machining accuracy of five-axis machine tools, accounting for about 60% of the total manufacturing error. Geometric error has the characteristics of high systematicness, good repeatability, long-term stability and easy measurement, making Geometric error compensation has become an important means to improve the precision of five-axis machine tools. [0003] The exist...

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Problems solved by technology

[0004] Aiming at the above-mentioned deficiencies in the prior art, the present invention provides a tool posture optimization method for geometric error compensation of five-axis machine tools, which can effectively solve the problem of compensating geometric errors constrained by the texture of the workpiece starting from the tool touch trajectory representing the texture of the workpiece. question

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