Method for predicting milling residual stress field of titanium alloy

Abstract

The invention relates to a method for predicting a milling residual stress field of titanium alloy. The method can predict the milling residual stress field of the titanium alloy based on exponential decay functions and includes the main steps: 1, determining an exponential decay function model of a milling residual stress field; 2, determining a relation model between a residual stress field control factor and a milling process parameter; 3 selecting the milling process parameter and performing encoding; 4, designing a test scheme, and performing a milling test; 5, testing the residue stress field; 6 solving the residual stress field control factor. The method uses the milling process parameter as an input condition, and can acquire distribution of the residue stress along a surface in the milling process parameter by solving a model coefficient, is simple and reliable, is fast in prediction speed, is high in accuracy, can avoid lots of complex tests, can avoid difficulties of the finite element method and the physical analytical method, and can be used by mass engineering and technical staff.

Description

technical field [0001] The invention belongs to the technical field of metal material machining, and in particular relates to a method for predicting the residual stress field of TC17 titanium alloy milling based on an exponential decay function. Background technique [0002] Titanium alloy material has excellent properties such as light weight, high strength, high temperature resistance and fatigue resistance. It is an important metal material for manufacturing major equipment in aerospace, national defense and other fields and key parts in new strategic weapons. In the structural design of new aero-engines, complex thin-walled components are widely used in order to achieve the purpose of reducing weight and increasing efficiency. With the continuous improvement of aero-engine bypass ratio, thrust-to-weight ratio and service life, the structure of thin-walled components becomes more complex, the material is more difficult to process, and the requirements for shape accuracy ...

AI Technical Summary

Problems solved by technology

[0007] The present invention aims at the problems of difficulty in controlling the residual stress field, heavy testing workload, and poor prediction accuracy in the above-mentioned existing milling process, and proposes a method for predicting the residual stress field of titanium alloy milling based on an exponential decay function, and realizes the prediction of the titanium alloy milling residual stress field. Prediction of residual stress field in alloy milling, and then guide the selection of titanium alloy milling process parameters

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