A dual-parameter tool position optimization method for five-axis side milling of non-developable ruled surfaces

Abstract

The invention provides a novel two-parameter tool location optimization algorithm for non-developable ruled surface five-axis side milling and belongs to the technical field of numerical control processing. The algorithm comprises the steps of (1) conducting isoparametric discretization on the u direction and v direction of a ruled surface and establishing the initial tool location of a taper tool, (2) establishing the initial directional error of a tool shaft, and (3) conducting two-parameter tool location optimization and establishing the optimal tool shaft track. According to the method, contrastive analysis is also conducted on the taper tool two-parameter optimization algorithm and the taper tool single-point offset algorithm, the taper tool initial tool location algorithm and the taper tool three-point optimization algorithm by means of machining simulation interference and a geometry programming error distribution rule diagram to verify the correctness and effectiveness of the novel two-parameter tool location optimization algorithm; by means of optimization of the two parameter directions, u and v, of the ruled surface, the optimal tool path is established, the numerical control programming error of non-developable ruled surface five-axis side milling can be reduced remarkably, and machining precision of non-developable ruled surface five-axis side milling is further improved.

Description

[0001] Technical field [0002] The invention relates to a five-axis side milling double-parameter tool position optimization method for a non-developable ruled surface, which belongs to the technical field of numerical control processing. Background technique [0003] Non-developable ruled surfaces have excellent aerodynamic properties and are widely used in aerospace industry products. However, due to the fact that the enveloping surface of the tool cannot completely coincide with the design surface during the side milling process of the non-developable ruled surface, NC programming errors are easily generated. Especially with the rapid development of the aerospace industry, the requirements for processing quality, precision and efficiency of non-developable ruled surface parts are becoming more and more stringent. [0004] For the optimization algorithm of tool positions for non-developable ruled surfaces, the literature "Five-axis NC Cylindrical Milling of Complex Surface...

AI Technical Summary

Problems solved by technology

The algorithm adjusts the distribution of errors by introducing a scaling factor, which can reduce the error and obtain higher geometric programming accuracy, but it is not easy to determine the optimal scaling factor in the algorithm, and the v parameter direction of each tool position point The scale factor of can not be adjusted adaptively, so when the optimal solution is obtained in the u direction, the direction of the v parameter is not necessarily the optimal solution, so the geometric programming accuracy still has room for improvement

The above analysis shows that the current tool position planning algorithm for the five-axis side milling of the integral impeller based on the conical ball-end milling cutter has problems such as poor accuracy or low efficiency, which needs further improvement and optimization

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