A high-speed helical milling method for pockets based on spin-up auxiliary lines

Abstract

The invention discloses a cavity high-speed spiral milling method based on a rotating auxiliary line. Inner equal-distance rings of a molding cavity profile are indexed by equal distances; two main shafts in outer sample placing points of the inner equal-distance rings of the molding cavity profile are analyzed and calculated by main components; a part of long main shafts is optimized for cutting as the rotating auxliary line for molding cavity sample placement through length factors; a point nearest the outer sample placing points on the rotating auxiliary line is obtained as an inner sample placing point by a vector method; the inner and outer sample placing points of a molding cavity are correspondingly connected to obtain a sample placing line; the linear interpolation is performed for the sample placing line to generate a spiral folding line; and control vertexes distributed according to exponential function rules are interpolated for B sample bar optimization to finally generate a spiral cutter rail. The method adopts the main component analysis, introduces the rotating auxiliary line in the molding cavity, adopts the linear interpolation and B sample bar curve fitting technology to generate the spiral cutter rail, largely increases a mean value of cutting widths, reduces repeated cutting rate, reduces the length of the cutter rail, and improves the production efficiency.

Description

technical field [0001] The invention relates to a high-speed helical milling method for a cavity based on a spinning auxiliary line. Background technique [0002] Cavity milling is widely used in aircraft, mold, automobile and other fields. 80% of mechanical parts in industrial manufacturing can be formed by 2.5D milling. Even complex parts are usually roughed by layer cutting. [0003] For the milling of the cavity, the traditional method usually uses line cutting [3] and circumcision [4] The algorithm generates the tool path, but there is a sudden change in the direction of the cutting tool path, which increases the cutting force sharply, deforms the workpiece due to strong vibration, and reduces the surface processing quality of the workpiece. Therefore, the tool must reduce the feed rate at the corner of the cavity boundary, resulting in low efficiency. [0004] Only C is the tool path for row cutting and ring cutting 1 Continuous, not suitable for high-speed milli...

AI Technical Summary

Problems solved by technology

[0005] In order to solve the technical problems of large cutting tool track length and low cutting efficiency at present, the present invention provides a spin-up auxiliary line that can greatly increase the average value of cutting width, reduce repeated cutting rate, reduce tool track length, and improve production efficiency. High-speed helical milling method for cavity

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