【摘要】 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。更多还原

【Abstract】 Micro- hole Drilling is one of the most important processes in PCB( printed circuit board)manufacturing. Lips are inclined to occur on two sides of the bar blanks in sinter molding PCB drills,leading to the impact forces bearing on PCB drills in the rough grinding process. Automatic orientation of the tiny lips,compared to the size of the PCB drills blanks,can be realized in the peripheral direction by friction performance design of varied contact friction between two contact rollers and PCB drills blanks.更多还原