PCB 微钻切削刃结构参数化分析 - 深圳市金洲精工科技股份有限公司.PDF

2011 45l 5 31 PCB 1 2 侯文峰, 张宪民 1; 2 : PCB , , , , , , :; ; ; ; ; :TG713+ . 1;TG52;TN41 :A Analysis of Structural Parameterization of Cutting Edge of PCB Micro- drill Hou Wenfeng, hang Xianmin Abstract: The carbide drills for printed circuit boards, which are derived form conventional twist drills, are microholes drilling tools with complex helical flutes. The relationships between the structural parameters and the cutting performances are closely related, andthe structural parameters are relatedto each other and influencing each other. In this paper, the mathematical model of flank surfaces of microdrill in the global coordinate system is established by defining the rotation matrix, and the related mathematical expressions of chisel edge angle and cutting lips are derived via vectors. The structural parameters that influence the performances of cutting are quantitatively analyzed and some concluding remarks are made for engineering design with some theo- retical principles. Keywords:micro-drill; major cutting edge; chisel edge; regrind; printed circuit board;tungsten carbide , , 1 [ 2] , ( PCB) , 011mm , , , , PCB ( PCB ) , , , PCB , [3] , PCB , PCB , , , , [ 1] ST UC , 1 [4,5] [6] PCB Bono 31175mm 2100mm