中国机械工程2011，Vol.22Issue(8)：961-966,6.
PDC纤维微刃刀具精密切削n-WC/12Co涂层的试验研究
Study on Precision Cutting of n-WC/12Co Coatings Using PDC Fiber Cutter
摘要
Abstract
This study is to investigate precision milling of nanostructured WC/12Co (n-WC/12Co) coatings experimentally by using PDC fiber of sectional size 10mm× 0. 6mm× 0.3mm,which were prepared by cutting PDC with YAG laser. The depth of cut of per fiber was smaller than that in the conventional milling but larger than the individual grit depth of cut in grinding, and the rake angle of fiber milling was -30° and 0° respectively. During cutting experiments, a piezoelectric force transducer (Kistler model 9257BA) was used to measure cutting forces on line, and a scanning electron microscopy (SEM) was utilized for observing the machined surfaces. Moreover,n- WC/12Co coating was ground by using SD80N100B and SD600N100V, and the ground surface was compared with that milled by PDC fiber. The study verifies that a diamond fiber cutter with zero rake angle results in better surface finish than the 600 # diamond wheel. On the other hand, the diamond fiber cutter with -30° rake angle results in large ratio of normal to tangential forces and the resulting machined workpiece shows a surface with granular surface roughness and also obvious microcracks at an increased depth of cut. Finally, the material removal mechanism of n-WC/12Co coating cutted by PDC fiber was discussed herein.关键词
n-WC/12Co涂层/PDC纤维/精密切削加工/加工损伤Key words
n- WC/12Co coating/ PDC fiber/ precision cutting/ machining damage分类
矿业与冶金引用本文复制引用
张高峰,张璧,邓朝晖,胡中伟,谭援强..PDC纤维微刃刀具精密切削n-WC/12Co涂层的试验研究[J].中国机械工程,2011,22(8):961-966,6.基金项目
国家自然科学基金资助项目(50875225,50775069) （50875225,50775069）
