source:Other information release time:2023-07-06 Hits: Popular:PCB Assembly company
PCB drill bits belong to a type of cutting behavior, so the principle is roughly the same as general cutting; Generally speaking, there are two calculation formulas widely used in drilling:
1. R.P.M=(S.F.M * 12)/π * D
2. I.P.M=R.P.M * Chipload
Firstly, introduce the various units of the two companies mentioned above:
(1) R.P.M=Drill needle rotation speed, revolutions per minute, which is the number of revolutions per minute.
⑵ S.F.M=surface cutting speed, in feet per minute, that is, the cutting distance or length of the cutting edge on the board surface per minute (Surface Feet Per Minute).
⑶ D: Diameter of the drill bit.
(4) I.P.M: Feed speed, inches/minute, and how many inches per minute of feed depth are there.
(5) Chipload: Feed quantity, fixed/revolution, how much fixed is the feed depth per revolution, and briefly introduce the source of the R.P.M=(S.F.M * 12)/π * D formula.
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