Sequence planning method of mixed processing of material increasing and decreasing of five shafts of composite structure

Abstract

The invention provides a sequence planning method of mixed processing of material increasing and decreasing of five shafts of a composite structure. The method is characterized by comprising steps offirstly, defining the machinability of a knife based on a Gauss ball; based on a light protection method, carrying out analysis and calculation on the machinability of the knife; establishing a knifemachinability model under a five-shaft linkage material increasing and decreasing mixed processing mode; meanwhile, in a sequence planning process, for the coupling problem of printing direction decision making and the machinability calculation, based on an iteration searching method, carrying out initial printing method decision making on parts; carrying out coarse decomposition on part bodies; constructing an initial mixed processing sequences; and under the constraint of the knife machinability, based on a greedy algorithm, achieving the whole planning of the mixed processing sequences. According to the invention, optimization of material increasing and decreasing alternative time sequences in the mixed processing process is achieved; knife changing frequency is greatly reduced and thefoundation is laid for achieving of highly-efficient mixed processing.

Description

technical field [0001] The invention relates to a processing sequence planning method, in particular to a composite processing technology of adding and subtracting materials, in particular to a method for planning a sequence planning method of a five-axis mixed processing of adding and subtracting materials for complex structural parts. Background technique [0002] With the continuous improvement of people's requirements for product performance, the structure of parts is becoming more and more complex, and the requirements for machining accuracy are also increasing. This is especially evident in the field of aerospace manufacturing, where the most representative aerospace structural parts include integral impellers and integral blisks. For the processing of such complex structural parts, the traditional CNC machining (subtractive manufacturing) method has serious tool accessibility problems. The parts are either difficult to form, or the processed products cannot meet the a...

AI Technical Summary

Problems solved by technology

In the current research, part of the research is only for the three-axis printing mode, and it is necessary to add too many auxiliary supports for the complex structure, resulting in more alternating times of adding and subtracting materials, and the mixed processing efficiency is not high; while the other part is aimed at the five-axis mixed processing. It is only suitable for structures with simple shapes and no tool collisions, and it is difficult to achieve mixed processing of complex structural parts

[0005] In the process of five-axis hybrid machining of complex structural parts, it is inevitable to frequently alternate the process of adding and subtracting materials, and the process of alternation is accompanied by lifting and changing tools, which will inevitably affect the overall processing efficiency of hybrid processing , so it is necessary to study an effective five-axis mixed machining sequence planning method, in order to reduce the number of tool changes through reasonable planning of the machining sequence, so as to ensure the mixed machining efficiency of the parts to the greatest extent

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