微结构高精密微铣削的动态特性及稳定性研究

项目名称： 微结构高精密微铣削的动态特性及稳定性研究

项目编号： No.51305286

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： 曹自洋

作者单位： 苏州科技学院

项目金额： 25万元

中文摘要： 微细铣削加工因具有多种材料适应性和可加工复杂三维形状等优点而在微细加工技术中具有独特的优势，但由加工系统引发的动态不稳定现象会明显降低切削效率和零件的加工质量，降低刀具、机床的使用寿命，已经成为阻碍该技术发挥其优势的主要瓶颈之一。本项目以微结构的微细铣削加工为研究对象，针对微细铣削加工的再生型颤振，考虑尺寸效应的影响，进行微细铣削系统动力学建模与仿真，构建综合微铣削动态不确定性的颤振稳定域解析模型；采用数值分析和微铣削试验相结合的方法，深入研究机床系统刚度、切削参数、系统动力学参数和刀具结构参数等对铣削稳定性的影响机制；最后，以铣削加工稳定性和加工误差预报为基础，实现微细铣削颤振的预测和抑制，以及微细铣削的加工优化。项目的研究为微三维结构的高速、高效、高精度铣削加工提供了科学的理论依据和技术支撑，以及对深入理解微细铣削加工机理，促进微细铣削加工技术的发展，具有重要的科学意义和实用价值。

中文关键词： 微铣削；动态特性；颤振；稳定性；精密

英文摘要： Micro-milling process has unique superiority in micro-manufacturing technology with the advantages of processing a variety of materials and complex three-dimensional shapes. However the dynamic instability caused by the machining system reduce significantly the processing efficiency and machining quality, reduce the life of cutting tools and machine tools, which has become one of the main bottlenecks to hinder the development of micro-milling technology. For the research of regenerative chatter, the micro-milling of micro structures is taken as a research object and the size effect is considered in this project. To begin with, the dynamics of micro-milling process is modeled and simulated, and the chatter stability model integrated dynamic uncertainty of micro-milling process is constructed. Furthermore, the influence of machine tool stiffness,cutting parameters, system dynamics parameters and tool structural parameters on chatter stability in micro-milling is studied deeply by the combination of numerical analysis and micro-milling experiments. Besides, the forecast and suppression of chatter in micro-milling is realized based on milling stability and machining error prediction. Finally the machining parameters in micro-milling are optimized. The project may provide the scientific theory basis and technical su

英文关键词： micro milling； dynamic characteristics；chatter；stability；precision