Drill point special for soft-hard combination plate

A technology that combines soft and hard plates and drill needles. It is used in repairing drills, drilling tool accessories, drilling/drilling equipment, etc. It can solve the problems of wrinkling, easy tearing of drilling, and failure of drilling effect to meet quality requirements. , to achieve high-quality results

Pending Publication Date: 2018-04-20
ZHUHAI HAIHUI ELECTRONICS
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Rigid-flex boards are different from pure soft boards and hard boards. Conventional soft-board drills have insufficient hardness requirements for soft-rigid boards, while pure hard board drills have insufficient defects for the soft part of soft-hard boards. Therefore, the drilling effect cannot meet the

Method used

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  • Drill point special for soft-hard combination plate
  • Drill point special for soft-hard combination plate
  • Drill point special for soft-hard combination plate

Examples

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Embodiment Construction

[0019] refer to figure 1 , is a better implementation. A special drill for soft-hard boards, comprising a drill 1 and a handle 2, the angle α of the drill tip of the drill 1 is 125°-135°, the diameter ΦD of the handle 2 is 3.0mm-3.2mm and the drill The drill core thickness d of the cutter 1 is 0.05 mm to 0.06 mm, the helix angle β of the drill cutter 1 is 33° to 39°, the first face angle γ1 is 12° to 18° and the second face angle γ2 is 27° to 33° °.

[0020] Further, the size of the drill point angle α will affect the discharge direction of the cuttings and the shape of the cutting chips, as well as the generation of cutting resistance burrs and so on. When the drill point angle α is large, the granular discharge is easier to discharge chips, but at the same speed, the pulling force on the soft-hard combination plate is greater, and sticking, swirling, and burrs are prone to occur. On the contrary, when the drill point angle α is small, the discharge becomes strips and is e...

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Abstract

The invention discloses a drill point special for a soft-hard combination plate. The drill point comprises a drill knife and a knife handle; the angle alpha of a drill tip of the drill knife is 125-135 degrees, the diameter phiD of the knife handle is 3.0-3.2 mm, the thickness d of a drill core of the drill knife is 0.05-0.06 mm, and the helical angle beta of the drill knife is 33-39 degrees; andthe first face angle gamma1 is 12-18 degrees, and the second face angle gamma2 is 27-33 degrees. The overall length L1 of the drill point is 35-42 mm, and the length L2 of a knife edge of the drill knife is 2.2-2.8 mm. According to the drill point, the problems of adhering, rotary profiling and burrs existing in the machining process of soft-hard combination plates for a long time in the industryare solved, machined holes are smoother and higher in quality, the reject ratio of products is reduced to 0-2%, and in addition, the hole wall roughness can be controlled to be within 10 [mu]m.

Description

technical field [0001] The invention relates to the technical field of PCB mechanical process, in particular to a special drill for soft-rigid boards. Background technique [0002] Rigid-flex board is a comprehensive product combining soft board and hard board. It is widely used in high-precision electronic products. With the rapid development of electronic products, such as: mobile phone camera pixel The drilling quality requirements of hard bonded boards are getting higher and higher. Rigid-flex boards are different from pure soft boards and hard boards. Conventional soft-board drills have insufficient hardness requirements for soft-rigid boards, while pure hard board drills have insufficient defects for the soft part of soft-hard boards. Therefore, the drilling effect cannot meet the quality requirements of the product. The roughness of the production hole wall is required to be less than 25um, but the actual production of 15% to 20% of the product hole wall roughness wi...

Claims

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Application Information

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IPC IPC(8): B23B51/00
CPCB23B51/00
Inventor 封家海
Owner ZHUHAI HAIHUI ELECTRONICS
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