Method for compensating central point of double-turntable five-axis linked numerical control machining rotary tool

Abstract

The invention discloses a method for compensating a central point of a double-turntable five-axis linked numerical control machining rotary tool. The method is characterized by comprising the following steps of: when a tool trace of a double-turntable five-axis linked numerical control system which machines a spatial complex curved surface is a straight line, discretely approximating the movementtrace of the central point of the tool through line interpolation, starting a real time control protocol (RTCP) module, obtaining a normal plane compensation vector and performing projection to obtain a central point compensation vector and output displacement by using the RTCP module, and inputting a number axis center distance parameter to realize the compensation of a nonlinear movement error during the machining of the double-turntable five-axis linked numerical control system. The method can well inhibit the nonlinear movement error, so that the running efficiency of the numerical control machining equipment is improved, the numerical control equipment can perform high-precision and high-efficiency machining, the machining quality of parts can be remarkably improved, and the method has excellent application prospect in the field of mechanical engineering.

Description

technical field [0001] The invention belongs to the technical field of RTCP of a five-axis linkage numerical control system, and in particular relates to a method for compensating the center point of a rotating tool in a double turntable five-axis linkage numerical control machining. Background technique [0002] Five-axis CNC machine tools are mainly used for efficient, precise and automatic processing of complex curved surfaces. It integrates computer control, high-performance servo drive and precision processing technology, and has a high cost. It was mainly used in the aviation industry and military departments in the past. In recent years, with the rapid development of microelectronics technology and control technology, the cost of five-axis CNC machine tools has been continuously reduced, and its reliability and functions have been continuously enhanced. Manufacturing and other areas of expansion. [0003] The five-coordinate machine tool adds two rotation axes on the...

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Problems solved by technology

[0007] The purpose of the present invention is to provide a method for compensating the center point of a rotating tool in CNC machining with a double turntable and five-axis linkage, which solves the problems in the prior art that the nonlinear motion error is difficult to correct or the correction processing method cannot be used universally.

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