钛合金超声椭圆振动辅助车削实验研究  

Tests for ultrasonic elliptical vibration-assisted turning of titanium alloy

作　　者：路冬[1,2] 蔡力钢[1] 程强[1] 吴勇波 

机构地区：[1]北京工业大学机械工程与应用电子技术学院,北京100124 [2]南昌航空大学航空制造工程学院,南昌330063 [3]秋田县立大学机械智能系统工程系

出　　处：《振动与冲击》2015年第6期151-154,共4页Journal of Vibration and Shock

基　　金：国家科技重大专项资助项目(2012ZX04010-011)

摘　　要：设计钛合金超声椭圆振动辅助车削实验,获得不同超声波电源电压下刀具近似椭圆运动轨迹。分析超声椭圆振动辅助车削切削力变化规律,与普通车削相比超声椭圆振动辅助车削能在较大程度上降低切削力。研究超声椭圆振动辅助车削工件表面粗糙度变化规律,与普通车削相比超声椭圆振动辅助车削工件表面粗度Ra值略增大,Rz值明显降低。分析进给速度对切削力的影响规律,随进给速度增大,普通车削及超声椭圆振动辅助车削切削力均升高。对同一进给速度,与普通车削相比超声椭圆振动辅助车削切削力均降低,且随进给速度增加其降低幅度减小。对比超声椭圆振动辅助车削与普通车削工件表面形貌发现,施加超声椭圆振动后工件表面沿切削速度方向形成有规律振纹。Tests for ultrasonic elliptical vibration-assisted turning（ UEVT） of titanium alloy were carried out. The elliptical trajectories of the cutting tool under different power supplying levels were obtained. The variations of the cutting forces in UEVT were analyzed. It was shown that compared with cutting forces in conventional turning（ CT）,the cutting forces in UEVT decreases obviously. The surface roughness in UEVT was also studied. The results showed that compared with surface roughness in CT,the surface roughness Ra value in UEVT is a little bit larger,while the surface roughness Rz value decreases obviously in UEVT. The effect of feed rate on cutting forces was analyzed. It was shown that the cutting forces increase with increase in the feed rate both in CT and UEVT; for the same feed rate,the cutting forces in UEVT are less than those in CT; the reduction level decreases with increase in the feed rate. The morphologies of a workpiece,surface were observed both in CT and UEVT. It was shown that regular vibration marks along the cutting rate direction on the workpiece surface are found in UEVT.

关 键 词：钛合金 超声椭圆振动辅助车削 切削力 表面粗糙度 

分 类 号：TG506.5[金属学及工艺—金属切削加工及机床]