Circuit board ultra-short slot machining method

Abstract

The embodiment of the invention provides a circuit board ultra-short slot machining method, and belongs to the technical field of circuit board manufacturing. The method comprises the following steps of: machining first auxiliary holes at two ends of an ultra-short slot in the length direction, machining at least one second auxiliary hole between the first auxiliary holes at the two ends, and finely trimming the structure between the first auxiliary holes and the second auxiliary holes to form the ultra-short slot. The first auxiliary holes and the second auxiliary holes are drilled in advance before the ultra-short slot is machined, so that a pre-drilled groove with the shape close to that of the ultra-short slot is drilled in a to-be-slotted position of a circuit board, and most materials in the ultra-short slot are removed. According to the circuit board ultra-short slot machining method, the ultra-short slot is obtained through further fine trimming on the basis of the pre-drilled groove, due to the fact that most materials are removed in advance, the cutting allowance of a groove cutter is small at the moment, the borne transverse unbalanced force is correspondingly reduced, deflection is not prone to being generated, and therefore the machining precision of the circuit board ultra-short slot is guaranteed.

Description

technical field [0001] The invention relates to the technical field of circuit board manufacturing, in particular to a method for processing ultra-short slot holes of a circuit board. Background technique [0002] In the drilling process of printed circuit board (PCB, Printed Circuit Board), the accuracy and size control of ultra-short slots are difficult points. The ultra-short slots here refer to the semicircle at both ends of the PCB. And for slots whose slot length is less than 1.5 times the slot width, how to process ultra-short slots with dimensional accuracy that meets the requirements is the focus of current research. [0003] At present, in the PCB manufacturing industry, when processing ultra-short slots, generally use a slot drill to drill a knife at one of the two ends of the circuit board to be slotted, and then drill a second slot at the other end to be slotted. There is a partial overlap between the first knife and the second knife, and then continue to stack...

AI Technical Summary

Problems solved by technology

[0005] The embodiment of the present invention provides a method for processing ultra-short slot holes in circuit boards, which is used to solve the problem that in the prior art, when the thickness of the circuit board or the number of stacks increases, the drill bit will deflect and the ultra-short slot holes will be skewed. Problems Difficult to Meet Size Requirements

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