CN202846618U - Microbit machining printed circuit board - Google Patents

Abstract

The utility model discloses a microbit machining printed circuit board. The microbit machining printed circuit board comprises a bit sub body, a drill bit main body and a cutting edge. The drill bit main body is connected on the bit sub body. The cutting edge is arranged on the end portion of the drill bit main body. A spiral chip groove is formed in the drill bit main body. A metal coating is covered on the drill bit main body and the cutting edge. Due to the fact that the method is adopted, the microbit machining printed circuit board is high in anti-friction, toughness and heat conductivity, high in resistance to chemical corrosion, not prone to corrosion, and capable of meeting the machining requirements of various printed circuit boards.

Description

A kind of microbit of processing printed circuit board

Technical field

The utility model relates to the printed circuit board (PCB) manufacture field, particularly relates to a kind of microbit for printed circuit board.

Background technology

Be in the process of pcb board at printed circuit board (PCB), an important step is to hole at printed circuit board (PCB).And because the development of technology, the unit are pore density increases on the pcb board, the wiring board number of plies increases progressively obviously, and the difficult drilling material take halogen-free base material as representative is used for the production of pcb board in a large number, in this case, during boring, the PCB microbit needs that size is less, drilling speed improves and could satisfy need of production.And existing PCB microbit is relatively poor because of hardness, toughness, when bit size hour 100,000 rev/mins of higher drilling speeds (〉) phenomenon that fractures can twist under the condition, and when bit bore is too much, can too much occur wearing and tearing because rubbing, and the drill bit under High Rotation Speed work also can be subject to the corrosion of the resin catabolite that causes because of the intensification of PCB material.

Namely along with the development of printed circuit board (PCB), common microbit because of difference of hardness, wear no resistance, the drill bit adhesion is poor and poor toughness, resistance to chemical corrosion be poor etc., and deficiency can not satisfy need of production.The new microbit that is used for processing printed circuit board need to be developed.

The utility model content

For above-mentioned deficiency of the prior art, the utility model purpose provides a kind of microbit of processing printed circuit board, have high-wearing feature, high tenacity and high thermal conductivity, and resistance to chemical corrosion is higher, be difficult for being corroded, can satisfy the processing needs of various types of printed circuit board (PCB)s.

For achieving the above object, the technical scheme that the utility model provides is: a kind of microbit of processing printed circuit board, comprise: bit sub body, drill main body, cutting edge, described drill main body is connected on the described bit sub body, described cutting edge is located at the end of drill main body, offer helical flute on the described drill main body, described drill main body and cutting edge are covered with a coat of metal outward.

Preferably, the described coat of metal is the titanizing layer.Because of the titanium light weight, wearability and corrosion resistance are all higher, and the titanizing layer increased the hardness of drill body and cutting edge, are beneficial to boring.

The beneficial effects of the utility model are: the utility model microbit is because of high-wearing feature, and to little brill matrix material not damaged, and drill body hardness is high, and wearability is good; Coefficient of friction is lower, has guaranteed the good chip removal in the boring procedure, and has prevented that effectively temperature rise is too high in the boring procedure.

Description of drawings

Fig. 1 is the structural representation of microbit one preferred embodiment of the processing printed circuit board of the utility model;

Fig. 2 is the enlarged diagram at A place among Fig. 1;

Fig. 3 is the work schematic diagram of the microbit of processing printed circuit board shown in Figure 1.

The specific embodiment

Below in conjunction with accompanying drawing preferred embodiment of the present utility model is described in detail, thereby so that advantage of the present utility model and feature can be easier to be it will be appreciated by those skilled in the art that protection domain of the present utility model is made more explicit defining.

See also Fig. 1 and Fig. 2, the microbit of a kind of processing printed circuit board of the utility model embodiment, comprise: bit sub body 1, drill main body 2, cutting edge 3, drill main body 2 is connected on the bit sub body 1, cutting edge 3 is located at the end of drill main body 2, offer helical flute on the drill main body 2, in order to the scrap in the boring procedure is drained, with smooth boring.Be covered with one deck titanizing layer outside drill main body 2 and the cutting edge 3, this titanizing layer has improved wearability, toughness and the resistance to chemical corrosion of microbit, makes the present embodiment microbit can finish the boring of the pcb board that relatively hard materials is made, and is difficult for impaired.Because the coefficient of friction of titanizing layer is lower, is beneficial to the chip removal in the boring procedure, and is beneficial to carrying out smoothly of boring.

Fig. 3 is the schematic diagram of the boring procedure of microbit on pcb board 4 to be processed of printed circuit board (PCB) in the present embodiment.

The microbit of the processing printed circuit board of the utility model also can be according to the product situation, at the metal of drill main body 2 and cutting edge 3 plating other types, to enhance productivity.

The above only is embodiment of the present utility model; be not so limit claim of the present utility model; every equivalent structure or equivalent flow process conversion that utilizes the utility model specification and accompanying drawing content to do; or directly or indirectly be used in other relevant technical fields, all in like manner be included in the scope of patent protection of the present utility model.

Claims (2)

1. the microbit of a processing printed circuit board, it is characterized in that, comprise: bit sub body, drill main body, cutting edge, described drill main body is connected on the described bit sub body, described cutting edge is located at the end of drill main body, offer helical flute on the described drill main body, described drill main body and cutting edge are covered with a coat of metal outward.

2. the microbit of a kind of processing printed circuit board according to claim 1 is characterized in that, the described coat of metal is the titanizing layer.

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