金刚石刀具高速精密切削加工的研究.pdfVIP

2002 年第 36 卷 №2 15 金刚石刀具高速精密切削加工的研究 王西彬 北京理工大学 摘 　要 :采用聚晶金刚石刀具和天然金刚石刀具对LY12 高强度铝合金进行了高速精密切削试验 ,系统研究了 切削条件 、切削用量对加工表面粗糙度的影响规律 。结果表明 ,在比常用切削速度高 8 倍的高速切削速度范围内 ( ) μ v = 800～1200m/ min ,采用圆弧刃天然金刚石刀具可获得 R 004～006 m 的高光洁加工表面 ;采用直线刃聚晶金 a 刚石刀具可获得 R 007～01μ a m 的光洁加工表面 。切削速度对加工表面粗糙度的影响主要受到机床动态特性的 制约 ;进给量的选择范围较大 ;背吃刀量对加工表面质量影响极大 ,为获得较小表面粗糙度必须合理选用背吃刀 量 。 关键词 :精密切削 , 　高速切削 , 　金刚石刀具 , 　表面粗糙度 , 　切削用量 Study on Highspeed Precision Cutting with Diamond Cutters Wang Xibin Abstract : A highspeed and high precision cutting test to turn the strong aluminum alloy LY12 with PCD and SPD cutters is carried out , and the influences of cutting conditions and cutting quantities on the roughness of machined surface are investigated systematically. Results show that , in the high cutting speed range from 800m/ min to 1200m/ min that is 8 times higher than the μ common precision cutting speed , the high finish surface with Ra 004～006 m can be obtained by using SPD cutter with the cir μ cular edge , and the finish surface with Ra 007～01 m can be obtained by using PCD cutter with the linear edge. The influence of cutting speed on the surface roughness is related with the dynamic performance of machine tool. A broad selection range is exist ed for the cutting feed , and a small but appropriate cutting depth must be taken to obtain good surface quality in the highspeed precision cutting. Keywords : pr