Pre-press type PCB hole slag removing drill bit

Abstract

The invention discloses a pre-press type PCB hole slag removing drill bit. The pre-press type PCB hole slag removing drill bit comprises a hollow casing pipe, two limiting sleeves symmetrically arranged along the hollow casing pipe, a drilling tool mechanism, an adjusting block, a spring, a pressing sleeve, a pressing ring, a baffle and a steel ball. The hollow casing pipe is inserted in a PCB hole which is about to be subjected to slag removal, the spring is compressed, accordingly, the pressing sleeve is reversely acted, the steel ball makes contact with a PCB, then, the hollow casing pipe rotates, the drilling tool mechanism slowly stretches out under the action of centrifugal force and damping action of an elastic column, a tool bit arranged on the drilling tool mechanism crushes and removes attached slag in the hole, a brush sweeps the hole wall machined through the tool bit, and accordingly slag is removed; and meanwhile, the steel ball rolls between the pressing ring and the baffle, and a pressing effect is kept accordingly. The device is simple in structure, the slag and scraps attached to the inner wall of the PCB hole can be effectively removed, environment friendliness is achieved, and the removal effect is good; and meanwhile, automatic pre-pressing can be conducted, hole wall damage caused by deformation of the PCB is prevented, and the yield of the PCB is increased.

Description

technical field [0001] The invention relates to a mechanical device, in particular to a pre-pressed PCB board hole slag removal drill bit. Background technique [0002] Printed circuit board, also known as PCB board, is the support body of electronic components and the carrier of electrical connection of electronic components. The manufacturing process of PCB board is complicated. The general process is: cutting, drilling, electroless copper (PTH) Copper plating and electroplating, pattern transfer (circuit), pattern electroplating (second copper) and protective tin plating, etching (SES), intermediate inspection, solder mask (SolderMask), printing characters, metal surface treatment, finished product molding, electrical testing, appearance Inspection (FQC / OQA), packaging and shipment, after the PCB board is drilled, there is a certain probability that glue residue will adhere to the PCB hole. Therefore, the PCB board needs to be treated with glue residue before sinking copp...

AI Technical Summary

Problems solved by technology

[0002] Printed circuit board, also known as PCB board, is the support body of electronic components and the carrier of electrical connection of electronic components. The manufacturing process of PCB board is complicated. The general process is: cutting, drilling, electroless copper (PTH) Copper plating and electroplating, pattern transfer (circuit), pattern electroplating (second copper) and protective tin plating, etching (SES), intermediate inspection, solder mask (SolderMask), printing characters, metal surface treatment, finished product molding, electrical testing, appearance Inspection (FQC / OQA), packaging and shipment, after the PCB board is drilled, there is a certain probability that glue residue will adhere to the PCB hole. Therefore, the PCB board needs to be treated with glue residue before sinking copper. There are two types of manual desmear removal and chemical removal in PCB holes. Manual removal of slag often uses drills to directly poke off the slag. Due to the different sizes of PCB board holes, drills of various specifications are often required. It often takes a lot of time to switch the solder during slag processing. At the same time, every time a PCB board is processed, it needs to be clamped once, which takes a long time and leads to low production efficiency.

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