发明名称 |
INCREMENTAL STEP DRILLING SYSTEM AND METHOD |
摘要 |
A method for drilling a hole in a work piece, such as printed circuit boards, comprises drilling to a point in a work piece and retracting said drill bit a retract distance. The retract distance is configured such that a tip end of said drill bit remains below a top surface of said work piece. The method further comprises drilling a distance greater than said retract distance into said work piece. |
申请公布号 |
WO02056123(A3) |
申请公布日期 |
2003.12.31 |
申请号 |
WO2001US49627 |
申请日期 |
2001.12.27 |
申请人 |
EXCELLON AUTOMATION CO. |
发明人 |
WEBER, KURT, W.;WONG, WARREN, K.;YANG, CHUNMIG |
分类号 |
B23B35/00;B23B47/34;B23Q11/00;H05K3/00 |
主分类号 |
B23B35/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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