基于Rayleigh-Ritz法的钛合金薄壁件非均匀余量加工变形控制研究

摘要/Abstract

摘要： 为减小钛合金薄壁件切削加工过程中的变形，提出了一种新型的非均匀余量设计策略。建立了基于Rayleigh-Ritz法的薄壁件铣削加工变形预测数学模型，提出了离散化的余量体积单元设计思路并完成了工件的非均匀余量设计，最后对比分析了不同余量设计策略对薄壁悬臂结构件加工变形的影响。研究结果表明：所提出的基于Rayleigh-Ritz法的离散余量体积单元非均匀余量设计策略对工件自身刚度利用率高，表面加工误差分布一致性好，且对控制最大表面加工误差具有更优的效果。

关键词: 薄壁件, 铣削变形, 加工误差, 非均匀余量, Rayleigh-Ritz法

Abstract: A new design strategy of non-uniform allowance was presented to reduce the deformations of thin-walled titanium alloy parts in cutting processes. A mathematical model for predicting milling deformations of thin-walled parts was established based on Rayleigh-Ritz method. A design idea was put forward based on discretized volume elements of machining allowances and the non-uniform allowance design of workpieces was completed. Finally, the effects of different allowance design strategies on the milling deformations of thin-walled cantilever structure parts were analyzed and compared. The results show that the proposed non-uniform allowance design strategy of discrete allowance volume elements based on Rayleigh-Ritz solution has high utilization rate of the stiffness of workpiece itself and good consistency in distribution of surface machining errors, and it also has better effects to control the maximum surface machining errors.

Key words: thin-walled part, milling deformation, machining error, non-uniform allowance, Rayleigh-Ritz method

中图分类号:

TG54

李曦;袁军堂;汪振华;章波. 基于Rayleigh-Ritz法的钛合金薄壁件非均匀余量加工变形控制研究[J]. 中国机械工程.

LI Xi;YUAN Juntang;WANG Zhenhua;ZHANG Bo. Study on Deformation Control of Thin-walled Titanium Alloy Parts in Non-uniform Allowance Machining Based on Rayleigh-Ritz Method[J]. China Mechanical Engineering.

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