CN104889458A

CN104889458A - Drill bit

Info

Publication number: CN104889458A
Application number: CN201510276346.9A
Authority: CN
Inventors: 彭包军
Original assignee: Qidong Lvsi Technology Innovation Center Co Ltd
Current assignee: Qidong Lvsi Technology Innovation Center Co Ltd
Priority date: 2015-05-27
Filing date: 2015-05-27
Publication date: 2015-09-09

Abstract

The invention discloses a drill bit. The drill bit is composed of a drill handle, a drill body and a drill tip. The drill bit is creatively characterized in that the drill tip is located at one end of the drill body and integrally formed with the drill body, the inner surface of the other end of the drill body is provided with an inner thread, the outer surface of the drill handle is provided with an outer thread matched with the inner thread of the inner surface of the drill body; the drill body is of a ladder-shaft-shaped structure, and the diameter of the drill body is decreased sequentially from the bottom end to the tip end. Accordingly, holes of different diameters can be drilled without always replacing dill bits, the time is saved, and working efficiency is improved; two chip grooves are formed in the ladder-shaft-shaped drill body; the two chip grooves stretch to the bottom end from the tip end in a spiral mode, at any section of the drill body, the chip grooves are opposite to one another in the radial direction on the drill body plane, accumulation of chips in the chip discharging process is reduced, and it is avoided that the drill bit cannot operate normally; the drill tip is conical, the stress area is reduced, the drilling strength is enhanced, and the drill tip can drill relatively-hard objects easily.

Description

A kind of drill bit

Technical field

The invention belongs to drill bit field, particularly relate to a kind of subland drill.

Background technology

Drill bit is the cutter that boring is commonly used, drill bit is when holing, mainly through cutter head top, workpiece is cut, by chip area, chip is discharged, if chip can not be discharged very smoothly, the hole inwall bored then can be caused to occur cut, workpiece is even caused to become waste product, during drill bit design, the helical angle of chip area directly affects the speed of its chip removal, the larger chip removal of helical angle is more smooth and easy, but, chip also can be larger to the wearing and tearing of drill bit, helical angle is less, chip removal can be slow, relatively little to bit wear, existing drill bit normally arranges three chip areas, chip area is narrow, so helical angle is usually smaller, chip removal is slow, there is cut in easy causing hole inwall.

The aperture of the boring that present market is common is of a size, and this has also just been doomed a boring can only bore the hole in an aperture, if want the hole drilling through different-diameter size, will select multiple different drill bit.

Some company also develops subland drill now, but its apex point selected mostly is circular, is not easy to the boring of stiffening object, brings certain inconvenience to drilling technique.

Summary of the invention

For solving the problem, the invention provides following technical scheme:

A kind of drill bit, by drillstock, drill body and apex point three part form, it is characterized in that: described apex point is positioned at one end of drill body, and be structure as a whole with drill body, the inner surface of the other end of described drill body is provided with internal thread, and the outer surface of described drillstock is provided with the external screw thread matched with the internal thread of the inner surface of described drill body.

Further, the structure of described apex point is conical.

Further, described drill body structure is ladder shaft-like structure, and the diameter from bottom to tip successively decreases successively.

Further, described two groove for cuttings extend to bottom from tip in a helical pattern, and along on arbitrary cross section of drill body, chip area is all positioned at position diametrically opposed to each other in drill body plane.

Beneficial effect of the present invention is as follows:

1, drill body of the present invention have employed ladder shaft-like structure, and its diameter is successively decreased to tip successively by bottom, so just can drill through the hole of different-diameter, does not always need more bit change, has saved the time, has improve operating efficiency;

2, drill bit of the present invention adopts conical apex point, is drilling through in the process of hole like this, reduces stress surface, and increase borehole strength, for comparatively hard object, tip drills through comparatively convenient, plays again the object of protection drill bit simultaneously;

3, drill bit of the present invention is provided with two groove for cuttings on ladder shaft-like drill body, described two groove for cuttings extend to bottom from tip in a helical pattern, along on arbitrary cross section of drill body, chip area is all positioned at position diametrically opposed to each other in drill body plane, the groove for cuttings of this symmetric figure, decrease the accumulation of chip removal thing in chip removal process, if chip can not be discharged very smoothly, then the hole inwall bored can be caused to occur cut, even cause workpiece to become waste product.

Accompanying drawing explanation

If Fig. 1 is structural representation of the present invention.

As the connection diagram that Fig. 2 is drillstock of the present invention and drill body.

Detailed description of the invention

Drawing reference numeral: 1, apex point, 2, drill body, 3, groove for cuttings, 4, drillstock, 5, the internal thread of drill body inner surface, 6, the external screw thread of drillstock outer surface

For making goal of the invention of the present invention, technical scheme and advantage clearly, below in conjunction with accompanying drawing, embodiments of the present invention are described in further detail.

As shown in Figure 1, a kind of drill bit is made up of drillstock 4, drill body 2 and apex point 1 three part, and apex point 1 is positioned at one end of drill body 2, and is structure as a whole with drill body 2, being connected by helicitic texture with drillstock 4 of the other end of drill body 2.Drill body 2 structure is ladder shaft-like structure, and the diameter from bottom to tip successively decreases successively, so just can drill through the hole of different-diameter, does not always need more bit change, has saved the time, has improve operating efficiency.

Bore on 2 in ladder shaft-like and be provided with two groove for cuttings 3, two groove for cuttings 3 extend to bottom from tip in a helical pattern, along on arbitrary cross section of drill body, chip area is all positioned at position diametrically opposed to each other in drill body plane, decrease the accumulation of chip removal thing in chip removal process, avoid the problem that drill bit cannot normally run.The structure of apex point 1 is conical, and reduce stress surface, increase borehole strength, for comparatively hard object, tip drills through comparatively easy.

As shown in Figure 2, for the connection of drillstock 4 of the present invention and drill body 2, the inner surface of one end of drill body 2 is provided with internal thread 5, and the outer surface of drillstock 4 is provided with the external screw thread 6 matched with the internal thread 5 of the inner surface of drill body 2, and drillstock 4 is connected by internal and external threads with drill body 2.

Above-described embodiment is preferred embodiment of the present invention; it is not the restriction to technical solution of the present invention; as long as without the technical scheme that creative work can realize on the basis of above-described embodiment, all should be considered as falling within the scope of the rights protection of patent of the present invention.

Claims

1. a drill bit, by drillstock, drill body and apex point three part form, it is characterized in that: described apex point is positioned at one end of drill body, and be structure as a whole with drill body, the inner surface of the other end of described drill body is provided with internal thread, and the outer surface of described drillstock is provided with the external screw thread matched with the internal thread of the inner surface of described drill body.

2. a kind of drill bit according to claim 1, is characterized in that: the structure of described apex point is for conical.

3. a kind of drill bit according to claim 1, is characterized in that: described drill body structure is ladder shaft-like structure, and the diameter from bottom to tip successively decreases successively.

4. a kind of drill bit according to claim 1, it is characterized in that: the structure of described drill body is: on ladder shaft-like drill body, be provided with two groove for cuttings, described two groove for cuttings extend to bottom from tip in a helical pattern, along on arbitrary cross section of drill body, chip area is all positioned at position diametrically opposed to each other in drill body plane.