印制电路板钻孔用多刃带钻头刀具磨损及孔位精度研究

Research on Tool wear and hole position accuracy of PCB drilling with multi-edge belt bit

为优化印制电路板(PCB)钻孔时的钻头侧刃磨损以及孔位精度,对多刃带钻头钻削印制电路板的刀具磨损情况进行分析,确认多刃带设计对孔位精度的影响。设计4组不同试验对象并比较,结果表明:多刃带钻头的的正面刃磨损并不明显,侧面刃磨损较严重,其中双刃带两边刃带等宽设计磨损最小。通过改进多刃带钻头钻削设计,PCB的孔位精度提升明显,其中提升最为显著的是双刃带两边刃带等宽设计。结论:采用多刃带钻头钻削设计,能够在一定程度上优化钻头侧刃磨损,并提升孔位精度。

In this paper,the tool wear of drilling PCB with multi-edge bit is analyzed,and the influence of multi-edge bit design on hole position accuracy is analyzed.In the process of specific analysis,four groups of different experimental objects were compared and analyzed.The four groups of different test results were compared with the drill test results designed with normal edge band parameters.The final test results showed that,first of all,the front wear of the PCB was not significant with the multi-edged bit drilling design.Secondly,the side edge wear is more serious through the multi-edge bit drilling design,and the wear of the double-edge belt with equal width design is the least.Thirdly,through the drilling design of multi-edge bit,the precision of hole position of printed circuit board is improved obviously,among which the most significant improvement is the design of equal width of the double-edge belt.Finally,in general,a multi-edge drilling design with a bit can optimize side edge wear and hole location accuracy to a certain extent.