CN202639429U - Drill bit structure used for drilling PCB (Printed Circuit Board) - Google Patents

Abstract

The utility model discloses a drill bit structure used for drilling a PCB (Printed Circuit Board). The drill bit structure comprises a tool bit, a cutter body and a hilt, wherein the tool bit is connected with the head end of the cutter body, the tail end of the cutter body is connected with the hilt, wherein the width of the tail end of the cutter body is greater than the width of the head end of the cutter body, and the width of the tail end of the cutter body is equal to the width of the bottom of the tool bit. According to the drill bit structure disclosed by the utility model, the heat accumulation condition caused by friction of the conventional drill bit in a drilling process of the PCB board is effectively improved, conditions of larger offset and poor drilling quality in the drilling process due to consistent width of the conventional cutter body are avoided, and the service life and the drilling aperture precision of the drill bit are effectively improved.

Description

The drill bit structure that is used for pcb board boring

Technical field

The utility model relates to a kind of drill bit structure, relates in particular to a kind of drill bit structure for pcb board boring.

Background technology

On existing various printed circuit board (PCB)s (pcb board) machining, many circular holes, the processing of conductive through hole diplodal structure all can be set, therefore also just related to the application of the instruments such as drill bit, the electronic circuit Drilling operation of printed circuit board (PCB) system needs the drill bit of small diameter to be implemented, and just can reach desired high accuracy, high feed speed, good hole wall quality etc.

Existing drill bit structure, shown in accompanying drawing 1a, consisted of by cutter head 1, cutter hub 2, handle of a knife 3 etc., wherein cutter hub 2 integral width are the same, this drill bit uses according to the method shown in accompanying drawing 1b in use, utilizes the point of a knife part of cutter head 1 that sheet material is implemented drawbore.But there is a kind of defective in this drill bit, the tool bit part width is greater than the cutter hub partial width during namely because of boring, after tool bit part entered pcb board 4 inside, cutter hub partly tended to occur the skew of the certain distance of left and right directions and waves, thereby affected the machining accuracy of drill bit.

Summary of the invention

In order to overcome the poor problem of bit bore machining accuracy in the prior art, the utility model discloses a kind of drill bit structure for pcb board boring, divide to improve by the tool setting body to have significantly improved borehole accuracy.

For achieving the above object, the utility model is achieved through the following technical solutions:

Be used for the drill bit structure of pcb board boring, comprise cutter head, cutter hub and handle of a knife, cutter head is connected with the cutter hub head end, and the cutter hub tail end is connected with handle of a knife, and wherein the width of cutter hub tail end is greater than the width of cutter hub head end, and the width of cutter hub tail end is identical with the cutter head bottom width.

Pass through said structure, when cutter head enters common multi-layer PCB board boring, the cutter hub tail end is owing to having the width identical with the cutter head bottom, can be just stable be positioned at boring, the width of boring has consisted of stable restriction to the cutter hub tail end, and cutter hub partly is difficult for beat raising Drilling operation precision in the drilling process thereby make; In addition, because the cutter hub major part can't contact with the hole wall of boring, can not affect the hole wall crudy.

Further, on the basis of the above, the heat that produces in order to distribute rapidly tool bit part boring prevents from being reduced to service life of cutter head, prevent that the metal fragment that cutter head boring produces from stopping up, the nose part of described cutter head is arranged with a plurality of helical chips and discharges groove.

By this structure, the chip that boring produces, normally aluminium base chip, copper base chip etc. can partly be discharged to cutter hub along discharging groove, thus the effect that has played heat radiation and prevented from stopping up.

Improve by said structure, drill bit structure of the present utility model can effectively improve the machining accuracy of pcb board boring, and the service life of improving drill bit.

Description of drawings

Fig. 1 a is existing drill bit structure schematic diagram;

Fig. 1 b is that existing drill bit uses view;

Fig. 2 a is the utility model drill bit structure schematic diagram;

Fig. 2 b is that the utility model drill bit structure uses view;

Fig. 3 is that the utility model drill bit structure cutter head improves structural representation.

The specific embodiment

With reference to figure 2a, be drill bit structure of the present utility model, comprise cutter head 1, cutter hub 2, handle of a knife 3, wherein end section 22 width of cutter hub 2 are identical with cutter hub 1 bottom width, and greater than the width of cutter hub 2 head end parts 21.

With reference to figure 2b, shown the use state of drill bit structure shown in Fig. 2 a, because cutter hub end section 22 has the width identical with cutter head 1 bottom, end section 22 just is limited in and can occur in the boring to be offset or to wave when multi-layer PCB board 4 boring.

With reference to figure 3, shown a kind of improvement structure of cutter head shown in Fig. 2 a, be provided with a plurality of helical chips at the side of cutter head 1 and discharge grooves 5, can in time discharge the chip that boring procedure produces.

Claims (2)

1. the drill bit structure that is used for pcb board boring, comprise cutter head, cutter hub and handle of a knife, cutter head is connected with the cutter hub head end, and the cutter hub tail end is connected with handle of a knife, it is characterized in that the width of cutter hub tail end greater than the width of cutter hub head end, the width of cutter hub tail end is identical with the cutter head bottom width.

2. the drill bit structure for pcb board boring according to claim 1 is characterized in that the nose part of described cutter head is arranged with a plurality of helical chips discharge grooves.

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