Circuit board processing method

A processing method and circuit board technology, applied in the directions of printed circuits, printed circuit manufacturing, electrical components, etc., can solve the problems of easy milling sawtooth, high temperature of milling cutters, poor milling accuracy or stability, etc. Chips, small volume effect

Inactive Publication Date: 2021-01-15
HUIZHOU TECHUANG ELECTRONIC TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, with the complexity of products, many high-density interconnected printed circuit boards adopt the process of CNC milling of circuit boards with copper, that is, the metallization groove process. When milling circuit boards with high TG and thick copper, not only The tool wear is huge, and both of them produce a large amount of copper wire and massive powder chips during milling, which are easy to block the chip discharge port, resulting in continuous high temperature of the milling cutter, poor milling accuracy or stability, and prone to milling. sawtooth

Method used

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  • Circuit board processing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] Drill the copper circuit board and make pilot holes on the edge of the milled area of ​​the copper circuit board. Transport the copper circuit board with the positioning hole to the CNC gong machine, and select the milling cutter for milling the copper circuit board, wherein the diameter of the rough milling cutter is 0.8mm, and the diameter of the fine milling cutter is 0.5mm. With the positioning point as the origin, set the milling path with copper circuit board in the CNC gong machine. The milling path includes rough milling path and fine milling path, and there is a reserved part of 0.1mm between the rough milling path and the fine milling path . After the rough milling path is set, the milling cutter is controlled by the CNC machine to carry out the rough milling operation along the rough milling path in the circuit board with copper and the relevant parameters are set. The speed of the rough milling cutter is 0.25m / min. The lower tool position is located at the...

Embodiment 2

[0057] Drill the copper circuit board and make pilot holes on the edge of the milled area of ​​the copper circuit board. Transport the copper circuit board with the positioning holes to the CNC gong machine, and select the milling cutter for milling the copper circuit board, wherein the diameter of the rough milling cutter is 3.0 mm, and the diameter of the fine milling cutter is 3.0 mm. 2.5mm. Taking the positioning point as the origin, set the milling path with copper circuit board in the CNC gong machine. The milling path includes rough milling path and fine milling path, and there is a reserved part of 0.3mm between the rough milling path and the fine milling path . After the rough milling path is set, the milling cutter is controlled by the CNC machine to carry out the rough milling operation along the rough milling path in the copper circuit board and the relevant parameters are set. The speed of the rough milling cutter is 0.5m / min. The lower tool position is located ...

Embodiment 3

[0059] Drill the copper circuit board and make pilot holes on the edge of the milled area of ​​the copper circuit board. Transport the copper circuit board with the positioning hole to the CNC gong machine, and select the milling cutter for milling the copper circuit board, wherein the diameter of the rough milling cutter is 2.0 mm, and the diameter of the fine milling cutter is 2.0 mm. 1.5mm. Taking the positioning point as the origin, set the milling path with copper circuit board in the CNC gong machine. The milling path includes rough milling path and fine milling path, and there is a reserved part of 0.2mm between the rough milling path and the fine milling path . After the rough milling path is set, the milling cutter is controlled by the CNC machine to carry out the rough milling operation along the rough milling path in the copper circuit board and the relevant parameters are set. The speed of the rough milling cutter is 0.35m / min. The lower tool position is located ...

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Abstract

The invention provides a circuit board processing method. The processing method of the circuit board comprises the following steps: drilling the circuit board with copper, and forming a positioning hole in the edge of a milling area of the circuit board with copper; selecting a milling cutter for milling the circuit board with copper; setting a milling path of the circuit board with copper by taking the positioning point as an original point, the milling path comprising a rough milling path and a finish milling path, the rough milling path being adjacent to the finish milling path, the finishmilling path being greater than the rough milling path, and the distance between the finish milling path and the rough milling path being a predetermined width; controlling the milling cutter to perform rough milling operation on the circuit board with copper along the rough milling path; and controlling the milling cutter to perform finish milling operation on the circuit board with copper alongthe finish milling path to obtain the circuit board with a metal groove. According to the processing method of the circuit board, milled sawteeth can be completely eliminated, and chip removal is easy.

Description

technical field [0001] The invention relates to the technical field of printed circuit board manufacturing, in particular to a method for processing a circuit board. Background technique [0002] With the rapid development of electronic products, people's high requirements for product quality have also led to higher and higher requirements for electronic manufacturers on printed circuit boards, and the difficulty of forming and processing boards is becoming more and more difficult. There are more and more requirements for molding, small spacing between sheets, and molding without process edges. Requirements for tolerances of ±0.075mm and ±0.10mm for external dimensions abound, and there are more and more complaints that affect the failure of normal pick-and-place testing of client fixtures. CNC will use rough and fine milling to control the accuracy of inner groove and shape. [0003] However, with the complexity of products, many high-density interconnected printed circui...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05K3/00
CPCH05K3/0044H05K3/0047
Inventor 张德剑江建能许校彬
Owner HUIZHOU TECHUANG ELECTRONIC TECH CO LTD
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