高速铣削速度对TC4钛合金表面完整性影响机理  

Influence Mechanism of Milling Speed on TC4 Titanium Alloy Surface Integrity in High-Speed Milling

作　　者：杨振朝[1] 张定华[1] 姚倡锋[1] 任军学[1] 田卫军[1] 

机构地区：[1]西北工业大学现代设计与集成制造技术教育部重点实验室,西安710072

出　　处：《南京航空航天大学学报》2009年第5期644-648,共5页Journal of Nanjing University of Aeronautics & Astronautics

基　　金：国家科技支撑计划重点(2008BAF32B10)资助项目;教育部重大(309026)资助项目;航空科学基金(2007ZE53061)资助项目;西北工业大学科技创新基金(2008KJ02018);2008全国博士学术论坛推荐优秀论文

摘　　要：通过TC4钛合金的高速铣削加工实验,研究了铣削速度对钛合金已加工表面完整性的影响规律。利用专业金属切削加工有限元软件AdvantEdge,对TC4钛合金高速铣削过程进行了二维模拟仿真,获得了在不同铣削速度下的温度场分布以及铣削速度对刀具前后刀面切削温度的影响规律。基于仿真结果,分析了TC4钛合金高速铣削速度对表面完整性的影响机理。结果表明：切削区最高温度位于刀-屑接触面上,距离刀尖0.01-0.02 mm的位置。铣削速度对切削温度影响显著,切削温度整体上随铣削速度增加而升高,但当铣削速度为301 m/min时,切削温度有所下降。By the experiments of high-speed milling of TC4 titanium alloy,the influence of the milling speed on machined surface integrity is investigated. The two-dimensional simulation of TC4 titanium alloy high-speed milling process is carried out by AdvantEdge,which is a professional metal-cutting processing finite element software. The temperature field distribution at different milling speeds and the effect of the milling speed at the cutting temperature on the rake and relief faces are obtained. Based on the simulation results, the influence mechanism of the milling speed on the surface integrity in the highspeed milling of TC4 titanium alloy is analyzed. Results show that the highest temperature in the cutting zone locates on the tool-chip interface at a distance of 0.01-0.02 mm from the tool tip. Generally,the influence of the milling speed at the cutting temperature is significant. The cutting temperature increases with the milling speed,but the cutting temperature decreases when the milling speed reaches 301 m/min.

关 键 词：TC4钛合金 高速铣削 表面完整性 温度场 影响机理 

分 类 号：TG54[金属学及工艺—金属切削加工及机床]