CN103769654A

CN103769654A - Bolt hole drill bit

Info

Publication number: CN103769654A
Application number: CN201210403653.5A
Authority: CN
Inventors: 钱志军
Original assignee: NORD WHEEL MANUFACTURING Co Ltd
Current assignee: NORD WHEEL MANUFACTURING Co Ltd
Priority date: 2012-10-22
Filing date: 2012-10-22
Publication date: 2014-05-07

Abstract

The invention relates to a bolt hole drill bit which comprises a drill bit head and a drill center tip. A feeding notch is formed in the drill bit head, drill edges are formed on two sides of the feeding notch, the feeding notch extends spirally along a drill bit body in the direction opposite to the drill center tip direction to form a discharging groove, and a reinforcing area is further arranged at the position of the discharging groove on the first cut side of the connection position of the drill bit head and the drill bit body. The bolt hole drill bit has the advantages of being high in tunneling capability, high in machining speed and long in service life. The drill bit head is connected with the drill bit body through transition areas, the included angle beta between the transition areas on two sides of the drill bit body is 90 degrees, and the bolt hole drill bit has the advantage that the drill bit head and the drill bit body are well connected and smooth in transition.

Description

Bolt hole drill bit

Technical field

The present invention relates to a kind of drill bit, especially a kind of on solid material lead plug go out the drill bit of bolt hole.

Background technology

At present, to process bolt hole drill bit for hard material, the drill bits of being made by high-speed steel that adopt more, in prior art, the cutting mouth of drill bit head has multiple, and in Chinese patent literature, CN101227992A has at least two cuttings mouthful, although how cutting mouthful can improve process velocity, but because cutting mouth is many, the stressed increasing of tiny drill bit head, can cause drill bit easily to break in hard material.

Those skilled in the art also improve for the drill bit that this has multiple cutting mouths, and comprise material or drill lip part are carried out, but result or undesirable.

Summary of the invention

The present invention is directed to that problem that above-mentioned prior art exists makes, the technical problem to be solved in the present invention is, provides a kind of driving ability strong, the bolt hole drill bit that process velocity is fast.

For solving the problems of the technologies described above, the technical solution used in the present invention is bolt hole drill bit, comprise drill bit head and unbearable point, described drill bit head is being provided with a charging breach, the dual-side of described charging breach forms drill lip, described charging breach along drill body dorsad described unbearable sharp direction extend spirally and form hopper, the blow tank position that a side is first cut in described drill bit head and drill body junction is also provided with strengthens district.

Adopt the bolt hole drill bit of technique scheme, owing to being only provided with a charging breach, therefore, it is stressed limit that bit direction only has the drill lip of a side, when the work of the drill bit of avoiding knowing clearly because of stressed too quickly breaking in hard material; Charging breach along drill body dorsad described unbearable sharp direction extend spirally and form hopper, guaranteed that the hard material cutting goes out rapidly groove, thereby be unlikely to extruding compressing drill bit, cause Driller Exothermic or be squeezed to fracture; In addition, the blow tank position of also first cutting a side in drill bit head and drill body junction is also provided with strengthens district, due to charging breach along drill body dorsad described unbearable sharp direction extend spirally and form hopper, simple such structure can reduce the bonding strength of drill body and drill bit head, therefore, be provided with in round and smooth blow tank position and strengthen district and be conducive to reinforce being connected of drill body and drill bit head.

As a further improvement on the present invention, described drill bit head is cylindrical, and the dual-side drill lip of described charging breach is formed with 60 degree angle a.

Through applicant's repeatedly creative experiments result, the data that draw show, the dual-side drill lip of charging breach is arranged to 60 degree angles, and the beneficial effect of its generation is: the speed of drill lip cutting hard material is faster, has guaranteed the hard material of cutting and the balance of blow tank discharging speed.

As a further improvement on the present invention, described drill bit head is connected by transition region with drill body, the angle of described drill body both sides transition region is 90 degree angle β, the beneficial effect of its generation is: make can be transitioned into more smoothly drill body after drill bit head driving hard material, reduce unbearable point cuts hard material in degree time in transit time, the tell somebody what one's real intentions are temperature of drill bit head, extends drilling life of bit.

As a further improvement on the present invention, described drill body is also provided with the link being connected with exterior part, and this link role is to make drill bit connect more closely exterior part.

Accompanying drawing explanation

Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in further detail, wherein:

Fig. 1 structural representation of the present invention;

Fig. 2 is the unbearable sharp diagrammatic top view of Fig. 1.

The specific embodiment

As shown in Figure 1, this bolt hole drill bit comprises drill bit head 1 and unbearable point 2, while carrying out bolt boring, hard material tunnels at the charging breach 3 being provided with from drill bit head 1, the dual-side of charging breach 3 forms drill lip 4, hard material along charging breach 3 along drill body 5 dorsad described unbearable sharp 2 directions extend spirally and form hopper 6 dischargings, in Fig. 1, drill bit head 1 is also provided with reinforcement district 8 with blow tank 6 positions that a side is first cut in drill body 5 junctions, reinforce drill bit head, make its drill lip that first cuts a side in the situation that of driving strength increase, can therefore not break in hard material, extend the life-span of bolt drill bit.

In Fig. 2, drill bit head 1 is cylindrical, and the dual-side drill lip 4 of described charging breach 3 is formed with 60 degree angle a.

In the present embodiment, the drill bit head 1 shown in Fig. 1 is connected by transition region 7 with drill body 5, and this makes, after drill bit head driving hard material, can be transitioned into more smoothly drill body, there will not be hysteresis phenomenon; In addition, by the angle of described drill body 5 both sides transition regions 7 be 90 degree angle β; Described drill body 5 reaches by link 9 is set the effect being connected with the external world.

Claims

1. a bolt hole drill bit, comprise drill bit head (1) and unbearable point (2), it is characterized in that: described drill bit head (1) is provided with a charging breach (3), the dual-side of described charging breach (3) forms drill lip (4), described charging breach (3) along drill body (5) dorsad described unbearable point (2) direction extend spirally and form hopper (6), blow tank (6) position that a side is first cut in described drill bit head (1) and drill body (5) junction is also provided with strengthens district (8).

2. bolt hole drill bit according to claim 1, is characterized in that: described drill bit head (1) is cylindrical, and the dual-side drill lip (4) of described charging breach (3) is formed with 60 degree angle a.

3. bolt hole drill bit according to claim 1, is characterized in that: described drill bit head (1) is connected by transition region (7) with drill body (5), and the angle of described drill body (5) both sides transition regions (7) is 90 degree angle β.

4. according to the bolt hole drill bit described in claim 1 ~ 3 any one, it is characterized in that: described drill body (5) is also provided with the link (9) being connected with exterior part.