Integral annular casing numerical control machining optimization method based on surface roughness control

Abstract

The invention provides an integral annular casing numerical control machining optimization method based on surface roughness control. The method comprises the following steps that firstly, a simulation model of a casing part is constructed, an initial numerical control machining program is written, then geometric simulation and physical simulation are conducted, the stability of the numerical control machining process is judged according to a simulation analysis result of cutting force, for a continuous machining path which is unstable in the machining process, segmentation treatment of the path is conducted according to a surface roughness index, and cutting force simulation analysis is conducted on the numerical control machining program with the segmented path again until the numericalcontrol machining program for stabilizing the machining process is obtained. According to the method, the numerical control machining program optimization period can be shortened, the part machining quality is improved, the problem of cutting force fluctuation in the numerical control machining process is solved, and high universality and practicability are achieved.

Description

technical field [0001] The invention relates to the technical field of numerical control machining in the aerospace field, in particular to an optimization method for numerical control machining of an integral ring casing based on surface roughness control. Background technique [0002] The aircraft engine casing is the shell and frame parts of the engine. It is an important load-bearing part of the aircraft engine. The main materials are superalloys and titanium alloys. The processing is difficult and the precision is high. The traditional CNC machining programs mostly rely on According to the experience of the technicians, the optimization of the NC machining program is realized only by reducing the step distance and optimizing the tool trajectory from the geometric level, without considering the change of the cutting force, the machining efficiency is low, and the stability of the machining process is poor. [0003] The optimization of NC machining program is one of the e...

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Problems solved by technology

[0004] Aiming at the deficiencies of the existing technology, in order to solve the difficult problems such as the difficulty in controlling the stability of the machining process of the integral ring casing parts, the low processing efficiency, and the difficulty in ensuring the machining accuracy, the present invention proposes a numerical control based on the surface roughness control of the integral ring casing. The processing optimization method, based on the requirements of the surface roughness index of the part and the uniform distribution of the cutting force, realizes the reasonable optimization of the processing parameters through the segmental processing of the numerical control processing process, and effectively improves the processing efficiency and processing quality of the part

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