Method for planning path of helical milling tool efficiently for mold cavity based on contour central axis

Abstract

The invention provides a method for planning the path of a helical milling tool efficiently for a mold cavity based on a contour central axis, and the method comprises the steps: calculating a tool path at each layer, carrying out the cutting of a central axis loop, cutting and calculating discs in the actual radial directions of all points, and taking the envelope curves of the discs are the toolpaths of all layers; calculating the path of the helical milling tool, solving the linear difference of two adjacent tool paths, enabling the two adjacent tool paths to be smoothly connected, and obtaining the path of the helical milling tool. The method integrates the advantages of the path of the helical milling tool and a conventional tool path, and the calculated and obtained tool path is smooth. Moreover, the total length of the tool is short, and the method is suitable for the processing of mold cavities in various shapes.

Description

technical field [0001] The invention relates to a milling tool path planning method, in particular to a cavity high-efficiency helical milling tool path planning method based on the contour central axis. Background technique [0002] The helical milling tool path is an efficient material removal tool path, which has high cutting efficiency and low tool wear rate, and is widely used in cavity milling. Compared with traditional milling strategies, such as contour parallel, zig-zag and one-way parallel strategies, the helical milling path only includes one advance and retreat process, and the tool path is smooth, avoiding the appearance of sharp corners and self-intersections, ensuring a high-quality cutting process. feed rate. At the same time, the helical milling tool path has a constant cutting direction, and there is only one cutting direction of down milling or up milling, and the radial cutting width changes uniformly, which improves the service life of the tool and prov...

AI Technical Summary

Problems solved by technology

[0005] Therefore, in view of the outstanding problem that the existing helical milling tool paths are difficult to meet the high-efficiency machining requirements of complex cavities with long and narrow bottleneck features, it is necessary to design a high-efficiency helical milling tool path planning method based on the central axis of the contour, which can effectively solve the problem When the traditional helical milling tool path is applied to the complex cavity contour, the average radial cutting width is much smaller than the set value, the total length of the tool path is too long, and the processing efficiency is low.

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