CN211332189U - Drill bit - Google Patents

Abstract

The utility model provides a drill bit, belonging to the technical field of machining; the drill bit comprises a taper shank, the taper shank is matched with a sleeve of a drilling tool on a drilling machine, a drill bit body is arranged at the end part of the taper shank, a spherical surface is arranged on the drill bit body, and a guide column is arranged at the end part of the drill bit body. The drill bit can not only complete the processing of the spherical counter bore at one time, but also process the counter bore bottom plane at the same time, and the processed counter bore is not deflected.

Description

Drill bit

Technical Field

The utility model relates to the technical field of machining, especially indicate a drill bit.

Background

The common counter bore has a cylindrical surface and a conical surface, the counter bore of the cylindrical surface is processed in a reaming mode after drilling, and the counter bore of the conical surface is processed by a 90-degree drill bit and is easy to deflect. The spherical counter bore of the structure shown in FIG. 1 is machined, and the above methods do not meet the requirements.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to provide a drill bit is in order to solve the problem of sphere counter bore processing difficulty.

In order to solve the technical problem, the utility model provides a following technical scheme:

the drill bit comprises a taper shank, wherein the taper shank is matched with a sleeve of a drilling tool on a drilling machine, a drill bit body is arranged at the end part of the taper shank, a spherical surface is arranged on the drill bit body, and a guide column is arranged at the end part of the drill bit body.

Wherein the spherical surface is provided at one end of the bit body.

Wherein the spherical surface is in smooth transition with the bit body.

Wherein, taper shank, drill bit body and guide post are connected in proper order.

Wherein, taper shank, drill bit body and guide post coaxial setting.

Further, the drill bit is integrally formed.

The utility model discloses an above-mentioned technical scheme's beneficial effect as follows:

in the scheme, the drill bit can not only finish the processing of the spherical counter bore at one time, but also process the bottom plane of the counter bore at the same time, and the processed counter bore is not inclined.

Drawings

FIG. 1 is a schematic view of a spherical counterbore;

fig. 2 is a schematic structural diagram of the drill bit of the present invention.

[ reference numerals ]

1. A guide post;

2. a drill bit body;

3. a taper shank;

4. a counterbore spherical surface;

5. and (6) a counter bore bottom hole.

Detailed Description

In order to make the technical problems, technical solutions and advantages to be solved by the present invention clearer, the following detailed description will be given with reference to the accompanying drawings and specific embodiments.

As shown in fig. 2, an embodiment of the present invention provides a drill bit, including a taper shank 3, wherein the taper shank 3 is conical and is adapted to a sleeve of a drilling tool on a drilling machine, a drill bit body 2 is disposed at an end of the taper shank 3, and a spherical surface is disposed on the drill bit body 2 to form a spherical surface 4 of a counter bore as shown in fig. 1; the end part of the drill bit body 2 is provided with a guide post 1 which plays a role in guiding during drilling to avoid deviation of drilling and is used for forming a counter bore bottom hole 5 shown in figure 1.

Wherein the spherical surface is provided at one end of the bit body 2.

The spherical surface and the drill bit body 2 are in smooth transition, and the diameter of the drill bit body 2 is larger than the outer diameter of a counter bore to be processed.

Wherein, taper shank 3, drill bit body 2 and guide post 1 are connected in proper order.

Wherein, the taper shank 3, the drill bit body 2 and the guide column 1 are coaxially arranged.

Furthermore, the drill bit is integrated into one piece, and meets the strength requirement.

In the scheme, the drill bit can not only finish the processing of the spherical counter bore at one time, but also process the bottom plane of the counter bore at the same time, and the processed counter bore is not inclined, thereby solving the problem of difficulty in processing the spherical counter bore.

The foregoing is a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the principle of the present invention, and these improvements and decorations should also be regarded as the protection scope of the present invention.

Claims (4)

1. A drill bit comprises a taper shank, wherein the taper shank is matched with a sleeve of a drilling tool on a drilling machine, and a drill bit body is arranged at the end part of the taper shank; the drill bit is characterized in that a spherical surface is arranged on the drill bit body; the drill bit comprises a drill bit body and is characterized in that a guide post is arranged at the end part of the drill bit body, a taper shank, the drill bit body and the guide post are coaxially arranged, and the spherical surface is arranged at one end of the drill bit body.

2. The drill bit of claim 1, wherein the spherical surface smoothly transitions with the bit body.

3. The drill bit of claim 1, wherein the shank, the bit body and the guide post are connected in series.

4. The drill bit of claim 1, wherein the drill bit is integrally formed.

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