微钻工艺则是PCB(印制电路板)制造中的重要工艺之一。PCB微钻毛坯成型容易在硬质合金棒材两侧形成棒筋,棒筋的存在,导致粗磨时PCB微钻毛坯承受因毛坯跳动而产生的磨削冲击力。尽管相比PCB微钻的毛坯尺寸,棒筋凸起小,但采用PCB微钻毛坯棒料与两个滚轮之间不同摩擦性能设计实现了PCB微钻毛坯的周向自动定向。 Micro-drilling process is PCB (printed circuit board) manufacturing one of the important processes. PCB micro-drilling rough forming easily in the carbide rod on both sides of the formation of rods, rods exist, resulting in rough grinding PCB micro-rough to bear the rough due to the impact generated by the beating force. Although compared with PCB micro-drilling rough size, the stick tendons convex small, but the use of PCB micro-drill blank bar and two different friction between the roller design to achieve the PCB micro-drill blank circumferential automatic orientation.