A method for processing ultra-short slot holes in circuit boards

Abstract

A method for processing an ultra-short slot hole in a circuit board provided by an embodiment of the present invention belongs to the technical field of circuit board manufacturing, and includes the following steps: processing first auxiliary holes at both ends of the ultra-short slot in the length direction; At least one second auxiliary hole is processed between the first auxiliary holes, and the structure between the first auxiliary hole and the second auxiliary hole is refined to form the ultra-short slot hole. By pre-drilling the first auxiliary hole and the second auxiliary hole before processing the ultra-short slot hole, a pre-drilled slot whose shape is close to the ultra-short slot hole is drilled at the position of the circuit board to be slotted, thereby eliminating the ultra-short slot hole Most of the materials in it. On the basis of the pre-drilled groove, further refinement is carried out to obtain an ultra-short groove hole. Since most of the material has been removed in advance, the cutting allowance of the groove cutter is small at this time, and the transverse unbalanced force is correspondingly reduced, which is not necessary. It is easy to produce deflection, thereby ensuring the processing accuracy of the ultra-short slot hole of the circuit board.

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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