A method for forming a sharp corner area of ​​a circuit board

A molding method and circuit board technology, applied in printed circuit, printed circuit manufacturing, electrical components, etc., can solve problems such as inability to guarantee molding quality, raised base material, and affecting the quality of circuit board molding, so as to improve chip removal and Effects of heat dissipation performance, prevention of base material protrusion, and reduction of risk of tool breakage

Active Publication Date: 2016-04-20
SHENGHUA ELECTRONICS HUIYANG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method cannot guarantee the molding quality, and due to the limitation of the narrow and long space structure in the sharp corner area, abnormal phenomena such as substrate protrusions are prone to occur when processing with a large-diameter milling cutter, which affects the molding quality of the circuit board.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Using the method for forming the sharp corner area of ​​the circuit board to form the circuit board with the tip width of the sharp corner area of ​​0.6 mm, the steps are as follows:

[0020] Step 1, in the drilling process before forming, a through hole with a diameter of 0.6 mm is provided at the tip of each circuit board to be processed at the sharp corner;

[0021] Step 2, take three pieces of circuit boards to be processed and fix them on the working position of the CNC molding equipment;

[0022] Step 3, when CNC forming, use a milling cutter with a diameter of 0.6mm, and take the center of the through hole as the cutting point of the milling cutter.

[0023] After forming the sharp corner area of ​​the circuit board, replace the large-diameter milling cutter and increase the length of the large-diameter milling cutter to form the area other than the sharp corner area. Because the risk of breaking the large-diameter milling cutter is greatly reduced, you can incre...

Embodiment 2

[0025] Using this method for forming the sharp corner area of ​​the circuit board to form a circuit board with a tip width of 0.7mm in the sharp corner area includes the following steps:

[0026] Step 1. In the drilling process before forming, three through holes are arranged at the tip of the sharp corner area of ​​each circuit board to be processed, and the three through holes are arranged linearly along the ray direction of the apex of the tip. The three through holes The holes intersect, and the ray direction along the apex of the sharp corner area gradually increases, and the diameters of the three through holes are 0.6mm, 0.7mm, and 0.8mm;

[0027] Step 2, take four pieces of circuit boards to be processed and fix them on the working position of the CNC molding equipment;

[0028] Step 3: Use a milling cutter with the same diameter as the through hole closest to the apex of the tip, that is, use a milling cutter with a diameter of 0.6mm, and take the center of the throug...

Embodiment 3

[0032] Using this method for forming the sharp corner area of ​​the circuit board to form a circuit board with a tip width of 1 mm in the sharp corner area includes the following steps:

[0033] Step 1, in the drilling process before forming, set four through holes at the tip of the sharp corner area of ​​each circuit board to be processed, and the four through holes are arranged linearly along the center line of the sharp corner area, and the four through holes Intersect, and gradually increase along the ray direction of the apex of the sharp corner area, the diameters of the four through holes are 1mm, 1.2mm, 1.4mm, 1.6mm;

[0034] Step 2, take five pieces of circuit boards to be processed and fix them on the working position of the CNC molding equipment;

[0035] Step 3: Use a milling cutter with the same diameter as the through hole closest to the apex of the tip, that is, use a milling cutter with a diameter of 1mm, and take the center of the through hole closest to the a...

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PUM

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Abstract

The invention discloses a circuit board wedge angle region forming method. The circuit board wedge angle region forming method comprises the following steps that: step 1, forming a through hole on the top end part of each circuit board wedge angle region to be processed before a CNC (computerized numerical control) is formed, or forming multiple through holes on the top end part of each circuit board wedge angle region to be processed, wherein the multiple through holes are arranged in a linear manner along the ray direction of the top point of the top end; step 2, overlaying and fixing multiple circuit boards to be processed on operation positions of CNC molding equipment; and step 3, when the through hole is arranged on the top end part of each circuit board wedge angle region to be processed, by virtue of adopting a milling cutter with same diameter with the through hole during the forming of CNC and utilizing the centre of the through hole as the lower cutter point of the milling cutter, when the multiple through holes are arranged on the top point of each circuit board wedge angle region to be processed, adopting the milling cutter with same diameter with the through hole which furthest approaches the top point of the top end, and taking the centre of the through hole which furthest approaches the top point of the top end as the lower cutter point of the milling cutter. The circuit board wedge angle region forming method provided by the invention is conductive to improving the moulding efficiency and quality of circuit boards, and the circuit board wedge angle region is prevented from being subjected to a base material convex phenomenon in a manufacturing process.

Description

technical field [0001] The invention relates to the technical field of printed circuit board forming, in particular to a method for forming a sharp corner area of ​​a circuit board. Background technique [0002] CNC forming is an important process in the production of circuit boards. In circuit board production, the production progress is often hindered due to the low utilization rate of CNC forming equipment, which restricts the increase in production capacity and affects product delivery. In order to improve production efficiency, PCB manufacturing companies adopt the method of increasing the number of superimposed circuit boards to be processed during molding to improve molding efficiency. However, the increase in the number of superimposed circuit boards will increase the overall thickness of the circuit board to be processed, resulting in a simultaneous increase in the length of the milling cutter blade used for forming processing. In production practice, increasing the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H05K3/00
Inventor 周定忠刘庚新庾文武
Owner SHENGHUA ELECTRONICS HUIYANG
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