航空复杂薄壁件铣削加工界面耦合作用与系统响应机制研究

项目名称： 航空复杂薄壁件铣削加工界面耦合作用与系统响应机制研究

项目编号： No.51305354

项目类型： 青年科学基金项目

立项/批准年度： 2014

项目学科： 机械、仪表工业

项目作者： 罗明

作者单位： 西北工业大学

项目金额： 25万元

中文摘要： 航空发动机难加工材料叶片类等复杂曲面薄壁零件关系国家高端核心装备和国家制造业核心竞争力。针对复杂薄壁件铣削加工过程的准确建模问题，拟采用工件与加工过程的时空细分方法将薄壁件加工过程的强时变、强非线性和空间非均匀性问题转化为定常、线性和均匀性问题；借助在线监控手段获取沿加工位置变化的工况参数，准确建立加工过程工艺模型。采用解析方法建立动态铣削过程模型与显式动态切削力模型，结合在线监测手段分析刀具-工件界面耦合作用并系统时滞微分方程。在此基础上，采用局部解析与离散时域仿真方法实现系统响应的快速预测；结合理论分析与在线监控手段，建立表面加工误差预测方法，揭示薄壁件时变加工过程与表面形貌的时空映射关系。本项目的研究将为复杂薄壁件的智能加工提供基础模型支持，并为复杂薄壁件加工过程系统响应预测、控制以及工件加工质量和加工效率的提高提供新的理论和方法。

中文关键词： 薄壁零件；耦合作用；动态响应；铣削加工；加工振动

英文摘要： Complex thin-walled parts such as titanium alloy based aero-engine blades are key components of high-end equipment, and their manufacturing technology matter of national core manufacturing competencies. Aiming at accurate modeling the milling process of complex thin-walled parts, a spatial-time domain discretization method is proposed in this project to convert the strong time-varying, strong nonlinear and spatial non-uniformity problem into a steady, linearity and uniformity problem. Then with online monitoring means, changing process parameters along tool path is obtained, and accurate milling process is modeled. Analytical method will be used to model the kinematics of milling process and explicit dynamic cutting force expression can be obtained. With online monitoring devices, tool-workpiece interaction can be analyzed and a time-delay differential equations can be expressed for the milling process system. On the basis, the milling process system response can be evaluated by combining the analytical and discrete time-domain simulation method. And then machined surface location error is predicted with the theoretical model and online monitoring methods, therefore reveals the relationship between the milling process and machined surface quality. The study of this project will provide basic model for the intell

英文关键词： thin-walled parts；coupling；dynamic response；milling；machining vibration