Method of reducing broken drilled plug holes

Abstract

The invention relates to a method for reducing broken drilled plug holes, comprising the following steps: S1, according to the positions of the positioning holes on the base plate, correspondingly drill positioning holes on the bottom plate and the cover plate, and according to the positions of the functional holes on the base plate, drill out positioning holes on the base plate and the cover plate Corresponding via holes are drilled on the board, S2, a cylindrical positioning pin is set at the position corresponding to the positioning hole on the base plate on the drilling platform of the drilling machine, and the diameter of the positioning pin is consistent with the diameter of the positioning hole; S3, the bottom plate, the base plate Put the cover plate on the positioning pin, and make the bottom plate, base plate and cover plate close to each other, and then fix the cover plate on the drilling platform; S4, use the drill to drill the base plate through the via hole on the cover plate , when drilling to half the thickness of the substrate, the drill bit is lifted up and separated from the substrate, hovering in the air for 5‑20 seconds and then continues to drill until the substrate is drilled through. The invention can effectively reduce broken drilled plug holes.

Description

technical field [0001] The invention relates to the field of PCBs, in particular to a method for reducing broken drilled plug holes. Background technique [0002] A printed circuit board (Printed Circuit Board, PCB) is a mechanical support for the fixed assembly of various electronic components such as integrated circuits, and realizes wiring and electrical connections or electrical insulation between various electronic components such as integrated circuits. 1. A product that provides the required electrical characteristics (such as characteristic impedance, etc.). As component manufacturers continue to increase productivity, customers usually request to reduce PCB processing prices every year, which poses a challenge to PCB processing companies. For their own survival and development, PCB manufacturers must reduce PCB processing costs, among which The broken drill phenomenon during the drilling process can effectively reduce the processing cost. [0003] In the prior art...

AI Technical Summary

Problems solved by technology

[0003] In the prior art, when drilling the PCB substrate, the substrate is usually clamped between the bottom plate and the cover plate, and the cover plate and the bottom plate are drilled at the same time when drilling, and the cover plate is used to prevent the drill needle from being lifted up. The copper foil layer on the substrate, the bottom plate is used to prevent the drill needle from touching the drilling platform during the drilling process, which undoubtedly increases the drilling thickness of the drill needle, causing additional hidden dangers of drill breakage