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Drilling method improving PCB plate counter-drilling precision

A technology of PCB board and drilling method, which is applied in the field of drilling using thick PCB boards, and can solve problems affecting product performance, affecting hole position accuracy, and offsetting of two-sided holes.

Inactive Publication Date: 2015-10-14
WUS PRINTED CIRCUIT (KUNSHAN) CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The most critical thing for drilling is the control of hole position accuracy. If the hole position deviation on both sides is large, there will be deviation or steps to form deformed holes when the two sides are docked, which will affect product performance.
At present, the industry has a method of adding positioning holes and positioning pins (generally 4 to 16 pieces) on the drilling jig; however, due to the influence of external forces during the process of turning the board over and setting the positioning pins, the positioning pins will be offset. In turn, it affects the accuracy of the hole position when drilling

Method used

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  • Drilling method improving PCB plate counter-drilling precision
  • Drilling method improving PCB plate counter-drilling precision
  • Drilling method improving PCB plate counter-drilling precision

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Embodiment Construction

[0020] The present invention will be specifically introduced below in conjunction with the accompanying drawings and specific embodiments.

[0021] A drilling method for improving the drilling accuracy of PCB board 1, comprising the steps of:

[0022] Step 1, the inner layer pads 2 are set on the four corners of the PCB board 1, and the PCB board 1 is pressed together; as a preference, the pads 2 are circular pads 2.

[0023] Step 2, use the punching equipment to grab the black ghost image of the inner layer pad 2, and use a drill to punch a pre-drilled hole from one side. The depth of the pre-drilled hole is less than the thickness of the PCB board 1; as a preferred method, the punching device is X- RAY, the depth of the pre-drilled holes is 55% to 60% of the thickness of the PCB board 1 . It should be noted that the diameter of the drill is smaller than the diameter of the pad 2; as a preference, the diameter of the drill is <0.7mm

[0024] Step 3, the PCB board 1 is turne...

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Abstract

The invention discloses a drilling method improving PCB plate counter-drilling precision. The drilling method comprises steps of first, arranging an internal layer bonding pad respectively on four plate angles of the PCB plate then pressing the PCB plate, second, capturing a black double image of the internal layer bonding pad via a drilling device, drilling a pre-drilling hole on one side via a drilling needle, and third, turning the PCB plate to the other side and capturing a white image of the pre-drilling hole via the drilling device and drilling through to form a positioning hole. The depth of the pre-drilling hole is smaller than the thickness of the PCB plate. The drilling method improves drilling precision and alignment degrees on two surfaces of the PCB plate.

Description

technical field [0001] A drilling method, especially a drilling method using a thick PCB board. Background technique [0002] When the thickness of the PCB board reaches a certain level, because it is limited by the length of the blade and the accuracy of the hole position, it needs to be realized by drilling from both sides. The most critical thing for drilling is the control of hole position accuracy. If the hole position deviation on both sides is large, there will be deviation or steps to form deformed holes when the holes on the two sides are docked, which will affect the product performance. At present, the industry has a method of adding positioning holes and positioning pins (generally 4 to 16 pieces) on the drilling jig; however, due to the influence of external forces during the process of turning the board over and setting the positioning pins, the positioning pins will be offset. Then it affects the hole position accuracy when drilling. The prior art has not so...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B26F1/24
CPCB26F1/24
Inventor 石建秦仪
Owner WUS PRINTED CIRCUIT (KUNSHAN) CO LTD
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