Machine tool control method based on RTCP algorithm of open five-axis numerical control system

Abstract

The invention provides a machine tool control method based on an RTCP algorithm of an open five-axis numerical control system, and the method comprises the steps: S1, solving the coordinates of a toolnose under a B-axis swinging coordinate system; S2, calculating the coordinate of the rotated tool nose, and calculating the tool nose variation of each interpolation period according to the coordinate of the rotated tool nose; S3, solving the coordinates of the surface points of the workpiece under a turntable coordinate system; S4, calculating coordinates of the surface points of the workpieceafter rotation, and calculating workpiece variation in each interpolation period according to the coordinates of the surface points of the workpiece after rotation; S5, establishing a nonlinear errorcompensation algorithm, and compensating machine tool coordinates; S6, converting the rotating coordinates of the B axis and the C axis to realize conversion from a workpiece coordinate system to a machine tool coordinate system, perfecting the converted coordinates under the machine tool coordinate system into RTCP, and inputting the RTCP into a numerical control system. According to the method,the coordinates of the machine tool are compensated through the three-axis coordinates of the machine tool, and universality and convenience are improved compared with the prior art due to specific invariant matrix calculation.

Description

technical field [0001] The invention relates to the field of machine tools, in particular to a machine tool control method based on the RTCP algorithm of an open five-axis numerical control system. Background technique [0002] With the development of ultra-precision machining, the shape of the processed parts is no longer limited to simple shapes such as planes and simple curved surfaces, and is developing towards complex shapes. The emergence of five-axis ultra-precision machine tools has significantly improved the processing efficiency and processing quality of the machine tool. However, due to the coupling of linear motion and rotary motion, the tool tip will generate additional motion, so that the trajectory of the tool tip does not coincide with the trajectory of the programmed point, resulting in nonlinear errors. At present, the most effective way to deal with this kind of error is to increase the RTCP function, but the commonly used method in China before is the pos...

AI Technical Summary

Problems solved by technology

The emergence of five-axis ultra-precision machine tools has significantly improved the processing efficiency and processing quality of the machine tool. However, due to the coupling of linear motion and rotary motion, the tool tip will generate additional motion, so that the trajectory of the tool tip does not coincide with the trajectory of the programmed point, resulting in nonlinear errors.

[0003] The program processed by the above method is not universal, which brings a lot of inconvenience to the operator, and the processing efficiency is low

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