BP and GA based blade machining cutting quantity optimization selection method

Abstract

The invention discloses a BP and GA based blade machining cutting quantity optimization selection method. The method comprises: establishing an aluminum alloy blade milling model by taking a spiral milling process of a ball end mill as a research object; simulating milling of blades of an aeroengine by using ABAQUS nonlinear finite element analysis software; summing up a change pattern between a cutting parameter and a deformation amount in milling simulation and a relationship between the cutting parameter and the deformation amount by using an artificial neural network algorithm, and establishing a blade milling deformation prediction model; and determining a design variable, a target function and a constraint condition for cutting parameter optimization, constructing a cutting parameter optimization model of aluminum alloy blades, and optimizing the cutting parameter by using a genetic algorithm. According to the method, the functional relationship between the deformation amount and the cutting parameter is established, and the cutting parameter optimization model is established, thereby providing a reasonable and quick cutting parameter selection method to guide actual production.

Description

technical field [0001] The invention belongs to the field of mechanical processing, and in particular relates to a method for optimizing and selecting blade machining cutting amount based on BP and GA. Background technique [0002] Aeroengine is the "heart" of aircraft and one of the determinants of aircraft performance. It belongs to the key high-tech fields of national defense. The research and development of aero-engine involves many disciplines, and it is a high-tech product that belongs to multidisciplinary comprehensive technology. There are many countries that can develop aircraft in the world today, but only four countries that can truly independently develop advanced aero-engines are the United States, France, the United Kingdom, and Russia. Therefore, it is a symbol of a country's scientific level and comprehensive technical capabilities, and even more so. It is a symbol of a country's comprehensive national strength. In the structural design of emerging aero-eng...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a method for optimal selection of blade processing cutting parameters based on BP and GA, aiming at solving the problem of conventional cutting parameters that are usually selected and kept unchanged for the sake of safety in the existing technology. The utilization rate is not high, the data is discrete, and the problem that the output objective function changes with the cutting parameters cannot be dynamically described.

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