CN2626654Y

CN2626654Y - Drilling bit

Info

Publication number: CN2626654Y
Application number: CN 03247501
Authority: CN
Inventors: 雷祖林
Original assignee: Shunda Computer Factory Co Ltd
Current assignee: Mitac Computer Shunde Ltd; Shunda Computer Factory Co Ltd
Priority date: 2003-06-20
Filing date: 2003-06-20
Publication date: 2004-07-21
Anticipated expiration: 2013-06-20

Abstract

A drill has a body and a first oil hole in parallel with the longitudinal axis of the body, the drill is further provided with a second oil hole; the second oil hole extends from the first oil hole to form a certain angle and penetrates the body to communicate with external environment. The drill can discharge scrap iron completely, satisfy the requirement of hole processing for precision and smoothness and ensure good cooling effect.

Description

Drill bit

Technical field

The utility model relates generally to a kind of drill bit structure.

Background technology

At present, mechanical processing industry usually uses the drill gun board to come the deep hole of machining high-precision, best bright finish, so this need can discharge iron filings in the bit bore process fully, and can carry out good cooling to drill bit, so can guarantee requirement precision, fineness.

But, the drill bit that existing gun drill such as China Patent No. 89107076.1 are announced, this drill body (cutter hub) is gone up to connect and is offered an oilhole road, fluid ejects to drill bit the place ahead straight via this oilhole road during boring, this structure directly causes producing a problem: in the boring procedure if when wanting to enlarge the aperture, especially through hole, iron filings are discharged difficulty, when especially beating through holes such as similar centre hole, also having some iron charges is bonded at around the duct, on drill bit and the oil-recovery tank, this can have influence on the precision and the fineness in this hole and next hole undoubtedly, and for avoiding taking place this phenomenon, the practice in the past is: operating personnel have bored after the hole at every turn, need in time to remove the iron filings that are bonded on the drill bit, so, be difficult to carry out process automation and continuity, seriously reduced production efficiency.Moreover under the long working occasion, the fluid of this oilhole road ejection can not satisfy the requirement of cooling drill bit, thereby influences the intensity and the life-span of drill bit.

Summary of the invention

At the existing problem of above-described existing gun drill structure, the utility model provides a kind of drill bit, and this drill bit can be discharged iron filings fully, satisfies drilling accuracy and fineness requirement, and can guarantee favorable cooling effect.

The utility model is taked following technical scheme:

It has a body this drill bit, the first oilhole road that has parallel this body longitudinal axis on it, this drill bit also has one second oilhole road, this second oilhole road is to extend at an angle from the first oilhole road to offer, this angular range can be 30～60 °, and this aperture, second oilhole road is 1/3 of the first oilhole road pore size.

Therefore, by the drill bit structure of the utility model, during boring, the iron filings before the drill bit can be discharged from the fluid of the first oilhole road ejection, the iron filings that the fluid of second oilhole road ejection then will residue on drill bit oil-recovery tank or the wall of a borehole are discharged, because this duct is less, therefore can form big oil pressure, guarantee iron filings are discharged fully, thereby institute's drilling accuracy and fineness have been guaranteed, simultaneously, because first, second oilhole road all provides fluid, guaranteed favorable cooling effect.

Description of drawings

Describe in further detail below with reference to the drill bit structure of the drawings and specific embodiments the utility model:

Fig. 1 is the drill bit structure schematic diagram of the utility model;

Fig. 2 is the drill bit structure side view of the utility model.

The specific embodiment

See also Fig. 1, shown in Figure 2, the drill bit structure of having represented the utility model, this drill bit has a body 1, the one end offers a main cutting edge 11 and a front cutting edge 12, and this main cutting edge 11, front cutting edge 12 extend to form main cutting edge wall 13, front cutting edge wall 14 respectively along this body 1, this main cutting edge wall 13, front cutting edge wall 14 are staggered at an angle, form the oil-recovery tank 15 with certain space; Have parallel this body 1 central axis on this body 1 and connect the first oilhole road 16 of this body 1, offer one second oilhole road 17 in this first oilhole road, 16 certain positions extension, this second oilhole road 17 and this first oilhole road 16 are at an angle, and run through body 1 and communicate with the external world, the oilhole 18 in this second oilhole road 17 can be opened on the main cutting edge wall 13 or front cutting edge wall 14 of oil-recovery tank 15, the figure shows this oilhole 18 and is opened on the main cutting edge wall 13; For guaranteeing the iron filings that residue on oil-recovery tank 15 and the wall of a borehole can be discharged fully, the angular range between this second oilhole road 17 and the first oilhole road 16 can be 30～60 °, and this angle is 45 ° of best angles in the present embodiment; In addition, these 17 apertures, second oilhole road should be littler than 16 apertures, the first oilhole road, and wherein, these second oilhole road, 17 pore sizes are that 1/3 of 16 apertures, the first oilhole road are the best.

Drill bit structure by the utility model, during boring, iron filings before the drill bit can be discharged from the fluid of the first oilhole road ejection, the iron filings that the fluid of second oilhole road ejection then will residue on drill bit oil-recovery tank or the wall of a borehole are discharged, because this duct is less, therefore the fluid of ejection can form big oil pressure, assurance is discharged iron filings fully, thereby has guaranteed institute's drilling accuracy and fineness, simultaneously, because first, second oilhole road all provides fluid, has guaranteed favorable cooling effect.

The above-mentioned the drawings and the specific embodiments that disclose only are a preferred embodiment of the present utility model, are not for limiting practical range of the present utility model; Those skilled in the art are in the technical characterictic scheme of setting forth according to the utility model, and other equivalence of being done changes or modifies, and all should be encompassed in the claim scope of the utility model.

Claims

1, a kind of drill bit, it has a body this drill bit, the first oilhole road that has parallel this body central axis on it, this body one end offers a main cutting edge and a front cutting edge, and this main cutting edge, front cutting edge extend to form main cutting edge wall, front cutting edge wall respectively along this body, it is characterized in that this drill bit also has one second oilhole road, this second oilhole road system extends at an angle from the first oilhole road and offers and run through body and communicate with the external world.

2, the drill bit according to claim 1 is characterized in that this aperture, second oilhole road should be littler than aperture, the first oilhole road.

3, the drill bit according to claim 2 is characterized in that this second oilhole road pore size is 1/3 of aperture, the first oilhole road.

According to claim 1 or 2 described drill bits, it is characterized in that 4, angular range is 30～60 ° between this second oilhole road and the first oilhole road.

5, the drill bit according to claim 4 is characterized in that angle is 45 ° between this second oilhole road and the first oilhole road.

6, according to claim 1 or 2 described drill bits, it is characterized in that the oilhole in the second oilhole road is opened on the main cutting edge wall.

7, according to claim 1 or 2 described drill bits, it is characterized in that the oilhole in the second oilhole road is opened on the front cutting edge wall.