宇航材料工艺2011，Vol.41Issue(4)：51-56,6.
加工工艺对7075铝合金紧固孔表面质量的影响
Effect of Machining Processes on Surface Quality of 7075Al Alloy Fastener Holes
摘要
Abstract
To achieve the required surface characteristics,the experiment and simulation researches on effects of drilling processes on surface quality of aircraft fastener holes drilled on 7075-T7351Al alloy were conducted from the perspective of surface integrity and fatigue life.Compared conventional multi-step drilling processes with Winslow,it is found that there are smaller roughness vales (Ra),less operation defects,larger compression residual as well as higher fatigue strength on the machined surfaces produced by multiple-step with slow feed (DBM) and Winslow,and Ra of Winslow is lower than 60％,fatigue limit is 23％ higher than that of DBM.Based on test data,two empirical formulas affecting roughness and residual stress are established,and strain distribution and temperature variation are analyzed by numerical simulation.In addition Winslow strengthening mechanism are discussed.It is put forward that appropriate increase in cutting speed or decrease in feed rate can improve surface quality of fastener hole.关键词
7075-T7351铝合金/表面完整性/疲劳寿命/紧固孔/制孔工艺/Winslow技术Key words
7075-T7351Al alloy/Surface integrity/Fatigue life/Fastener hole/Machining process/Winslow technology引用本文复制引用
裴旭明,陈五一,张东初..加工工艺对7075铝合金紧固孔表面质量的影响[J].宇航材料工艺,2011,41(4):51-56,6.基金项目
国防预研基金项目 （）
