An Error Vector Modeling Method for Position Deviation of Rotary Axis

Abstract

The invention discloses an error vector modeling method for the position deviation of a rotating shaft, including S1, analyzing the influence of the position deviation on the movement of the rotating shaft according to the motion properties of the rotating shaft and the definition of the position deviation; S2, establishing the definition of the spinner according to the exponential product theory Rotation axis motion screw expression; S3. Construct the ideal exponential motion matrix of A-axis, B-axis and C-axis according to the motion properties of different rotation axes; S4. According to the position deviation distribution of different rotation axes, use exponential product theory to construct A-axis, B-axis and the actual exponential motion matrix under the influence of the C-axis position deviation; S5, construct the position deviation transformation matrix of different rotation axes according to the relationship between the motion axis error matrix, the ideal motion matrix and the actual motion matrix; S6, convert the position deviation of different rotation axes The transformation matrix is ​​compared with the error matrix of the basic geometric error term of the motion axis, and the influence of position deviation of different rotation axes is obtained; S7. Substitute the influence of position deviation of different rotation axes to construct the error vector of position deviation of different rotation axes.

Description

technical field [0001] The invention belongs to the technical field of numerical control machine tools, and in particular relates to an error vector modeling method for the position deviation of a rotating shaft. Background technique [0002] Machine tools have been widely used in various manufacturing fields. With the development of manufacturing requirements and industrial technology, the requirements for high precision of machines are getting higher and higher. The "Made in China 2025" issued by the State Council emphasizes the reliability and precision of cutting-edge technology and equipment of high-end CNC machine tools. High precision has become an inevitable trend in the development of high-end CNC machine tools. Among the many factors affecting the machining accuracy of machine tools, geometric errors and thermal errors are the largest error sources of high-end CNC machine tools, accounting for about 60% of the total manufacturing errors. Modeling and compensation o...

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Problems solved by technology

[0004] The purpose of the present invention is to address the above-mentioned deficiencies in the prior art and provide an error vector modeling method for the position deviation of the rotating shaft to solve the problem that the linear error obtained in the prior art does not reflect the influence of the position deviation on the accuracy of the rotating shaft

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