Tool position planning method for five-axis multi-row side milling

Abstract

The invention provides a five-axis multi-row flank milling cutter position planning method. The method includes the first step of deducing cutting direction continuity conditions of envelope curved surfaces of two adjacent rows of cutters according to the two-parameter sphere congruence envelope theory, the second step of conducting segmentation design on the curved surfaces according to a curved surface parameter line to obtain multiple target curved surfaces, the third step of planning the cutter axial trace surface of the first target curved surface, the fourth step of sampling points on a top curved line of the cutter axial trace surface of the first target curved surface and calculating cutter center reference points of discrete cutter positions of the second target curved surface, the fifth step of calculating the directions of the cutter axes of the discrete cutter positions according to the linear constraint of the directions of the cutter axes, the sixth step of interpolating the discrete cutter positions to obtain the initial cutter axial trace surface of the second target curved surface, and the seventh step of establishing a five-axis multi-row flank milling cutter path planning model and obtaining the axial trace surface of the optimized second target curved surface. Through the five-axis multi-row flank milling cutter position planning method, the problem that geometric errors between the cutter envelope surfaces and the target curved surfaces approach a control error in the process of continuous splicing and layered machining of the two cutter envelope curved surfaces in the cutting direction is solved, and the method is applicable to flank milling of free-form surfaces and ruled surfaces or curved surfaces similar to the ruled surfaces.

Description

technical field [0001] The invention relates to a five-axis numerical control milling machine, in particular to a tool position planning method for five-axis multi-row side milling. Background technique [0002] In the field of mechanical manufacturing, five-axis CNC milling machines are widely used in the processing of complex curved surface parts such as molds, impellers, propellers, and turbine blades. According to the different ways of removing material by the tool, the five-axis CNC milling process is mainly divided into two types: point milling and flank milling. Compared with the former, the latter uses the side edge along the cutter axis for processing, which is a line contact processing forming method, which has the advantages of short processing time and low processing cost, and can efficiently obtain a higher quality processed surface. Therefore, side milling is very important in the processing of complex curved surface parts. [0003] At present, side milling i...

AI Technical Summary

Problems solved by technology

The blades of axial flow impellers are usually designed as free-form surfaces with large spatial distortions, which cannot be formed by one side milling pass

At present, point milling is often used, and it is difficult to improve processing efficiency and surface quality at the same time

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