Machining method for drilling of backboard of PCB
A processing method and printed circuit technology, applied in the direction of boring/drilling, metal processing equipment, drilling/drilling equipment, etc., can solve the problems of copper wire in the hole, broken drill, peaking, etc., to reduce broken drill High efficiency, not easy to break the drill, and improve the effect of heat dissipation
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[0018] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0019] A method for drilling holes on a PCB printed circuit board backplane, the steps comprising:
[0020] 1) According to the thickness of the plate and the size of the hole, when drilling the through hole, select a drill with a suitable diameter and blade length. Considering that the back plate is generally processed with high thickness, small hole diameter, and relatively large thickness-to-diameter ratio, a combination of two types of micro-drills, the long flute UC type (long-edged drill) and the short flute ST type (short-edged drill), are used. The method of drilling is carried out, and the short flute ST micro-drill is used for pre-drilling, the hole depth is controlled at 10-30% of the plate thickness, and then the long chip flute micro-drill is used to complete the drilling of the entire micro-hole, not only The hole posit...
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