Milling method for controlling wall thickness uniformity of a thin-wall structural member

Abstract

The invention discloses a wall thickness uniformity control milling method for a thin-wall structural part. A workpiece model and J C constitutive model are imported into ABAQUS finite element analysis software. milling path simulation is carried out according to the optimal milling process parameters determined by the high-speed milling test; According to a simulation result, a combination scheme of different overall feeding modes and feeding paths in a cavity is formulated, and finally, an optimal feeding path scheme is determined through a wallboard milling test, so that workpiece deformation is most beneficial to keeping of wall thickness uniformity in the milling process, and wall thickness uniformity control is achieved. The whole feeding path is bilaterally symmetrical, a compositefeeding mode combining spiral feeding and cycloid feeding is adopted in a single cavity, the machining time is short, and the stability of the machining process is improved; The machining deformationof the wallboard structural part is reduced by 40%, the machining efficiency is improved, the service life of a cutter is prolonged, and the machining cost is reduced.

Description

technical field [0001] The invention relates to a technology in the field of spacecraft manufacturing, in particular to a milling method for controlling the wall thickness uniformity of thin-walled structural parts. Background technique [0002] The outer wall of the arc-shaped wall plate of the spacecraft fuel cylinder is smooth, and the inner wall has a rhombus grid-shaped cavity, the purpose of which is to reduce the weight of the spacecraft. During the processing of arc-shaped wall plate cavity, it is necessary to control the uniform wall thickness. The complex structure of the curved wall plate makes it easy to produce processing deformation during the milling process, resulting in overcut or undercut of the material, resulting in uneven wall thickness. High-speed cutting puts forward higher requirements for the setting of the cutting tool path. In high-speed cutting, since the cutting speed and feed speed are very fast, if the cutting method is unreasonable, it is ver...

AI Technical Summary

Problems solved by technology

[0003] The present invention aims at the shortcomings of the prior art that the wall thickness of arc-shaped thin-walled structural parts cannot be effectively controlled during milling, and proposes a wall thickness of thin-walled structural parts Uniformity control milling processing method, aiming at the uniformity control of the wall thickness of the arc-shaped thin-walled wall plate structural parts, the spiral cutting method is used to cut into the workpiece, and the compound cutting method combining spiral cutting and cycloid cutting is adopted inside the cavity. Using a special way of cutting, processing layer by layer, milling grid-shaped cavity of thin-walled panels

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