CN213496734U

CN213496734U - Combined drill bit with multi-stage drill bit

Info

Publication number: CN213496734U
Application number: CN202022477576.0U
Authority: CN
Inventors: 王延凤
Original assignee: Jiangsu Fengjia Tools Co ltd
Current assignee: Jiangsu Fengjia Tools Co ltd
Priority date: 2020-11-02
Filing date: 2020-11-02
Publication date: 2021-06-22
Anticipated expiration: 2030-11-02

Abstract

The utility model discloses a combination drill bit with multi-stage drill bit, including dead lever, middle part drill bit and top drill bit, the dead lever upper end is provided with the bottom drill bit, bottom drill bit upper end is provided with the middle part drill bit, middle part drill bit upper end is provided with the top drill bit, the shaping of top drill bit top has the drill point to be, the bottom drill bit the middle part drill bit with equal shaping has the drill point on the top drill bit, the shaping has the chip groove between the drill point, dead lever periphery one side is provided with the wedge, the dead lever bottom is provided with square, square bottom is provided with the conical head. Has the advantages that: the utility model discloses a set up bottom drill bit, middle part drill bit, top drill bit, screw thread and wipe and the threaded rod, can be so that drill bit convenient to detach installs, the combination is nimble more various, improves the result of use, can carry out reaming processing and step hole processing, satisfies multiple drilling demand, and it is more convenient to use.

Description

Combined drill bit with multi-stage drill bit

Technical Field

The utility model relates to a drill bit technical field, concretely relates to combination drill bit with multi-stage drill bit.

Background

The drill bit is a tool for drilling, can break rock in the drilling process, can also carry out drilling processing to parts in the machining process, is used for very extensively, and in the drilling process, sometimes needs to drill a small hole before reaming or drilling a step hole, so that the drill bit needs to be frequently replaced, the processing workload is increased, the working efficiency is reduced, and therefore the problem needs to be solved by using a combined drill bit.

But current combination drill bit simple structure adopts fixed structural design mostly, and the flexibility is poor, uses inconveniently, and the stiff end of current combination drill bit is cylindrical mostly in addition, and the surface is smooth, and the frictional resistance who receives in drilling can make the drill bit slide easily when great, influences the drilling quality, consequently needs a combination drill bit that has multi-stage drill bit to solve current problem.

SUMMERY OF THE UTILITY MODEL

Technical problem to be solved

In order to overcome prior art not enough, present a combination drill bit with multi-stage drill bit, it is simple to have solved current combination drill bit structure, adopts fixed structural design mostly, and the flexibility is poor, uses inconveniently, and the stiff end of current combination drill bit is cylindrical mostly in addition, and the surface is smooth, can make the drill bit slide easily when the frictional resistance that receives is great in drilling, influences the problem of drilling quality.

(II) technical scheme

The utility model discloses a following technical scheme realizes: the utility model provides a combination drill bit with multi-stage drill bit, including dead lever, middle part drill bit and top drill bit, the dead lever upper end is provided with the bottom drill bit, bottom drill bit upper end is provided with the middle part drill bit, middle part drill bit upper end is provided with the top drill bit, the shaping of top drill bit top has the drill point to be, the bottom drill bit the middle part drill bit with equal shaping has the drill point on the top drill bit, the shaping has the chip groove between the drill point, dead lever periphery one side is provided with the wedge, the dead lever bottom is provided with square piece, square piece bottom is provided with the cone, the middle part drill bit with the top of bottom drill bit all is provided with the threaded rod, the middle part drill bit with the bottom of top drill bit all is provided with the thread groove.

Further, the bottom drill bit is welded with the fixing rod.

Through adopting above-mentioned technical scheme, can with bottom drill bit fixed connection is in on the dead lever, improve the holistic stability of drill bit.

Further, the middle drill bit and the bottom drill bit are connected with the threaded rod through the threaded groove.

Through adopting above-mentioned technical scheme, convenient to detach installation, the combination is nimble more various, improves the result of use.

Further, the top drill bit and the middle drill bit are connected with the threaded rod through the thread groove.

Through adopting above-mentioned technical scheme, can pass through drilling is carried out to the top drill bit, afterwards through the reaming is carried out to middle part drill bit, perhaps processing step hole, convenient to use.

Further, the wedge-shaped block is formed on the fixing rod.

By adopting the technical scheme, the roughness of the surface of the fixed rod can be improved, and the drilling tool can better clamp the drill bit.

Furthermore, the square block is formed at the bottom of the fixing rod, and the conical head is formed at the bottom of the square block.

Through adopting above-mentioned technical scheme, can guide the drill bit installation, improve the positioning accuracy of drill bit.

(III) advantageous effects

Compared with the prior art, the utility model, following beneficial effect has:

1. in order to solve the problems of simple structure, poor flexibility and inconvenient use of the existing combined drill bit, the utility model adopts a fixed structure design mostly, and can facilitate the disassembly and assembly of the drill bit by arranging a bottom drill bit, a middle drill bit, a top drill bit, a thread wiper and a threaded rod, the combination is more flexible and various, the use effect is improved, the reaming processing and the step hole processing can be carried out, various drilling requirements are met, and the use is more convenient;

2. for solving the stiff end of current combination drill bit most be cylindrical, and the surface is smooth, can make the drill bit slide easily when the frictional resistance that receives is great in drilling, influences the problem of drilling quality, the utility model discloses a set up dead lever and wedge, can improve the roughness on dead lever surface to make the drilling tool can press from both sides tight drill bit better, avoid at the drilling in-process, the drill bit takes place to slide, improves drilling quality.

Drawings

FIG. 1 is a schematic view of a composite drill bit with multi-stage drill bits according to the present invention;

FIG. 2 is a front cross-sectional view of a middle bit of a composite drill bit having multiple stages according to the present invention;

fig. 3 is a top view of a fixing rod in a composite drill bit having a multi-stage drill according to the present invention.

The reference numerals are explained below:

1. drilling a tip; 2. a drill edge; 3. chip cutting grooves; 4. a top drill bit; 5. a middle drill bit; 6. a bottom drill bit; 7. a threaded rod; 8. a thread groove; 9. fixing the rod; 10. a wedge block; 11. a square block; 12. a conical head.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

As shown in fig. 1-3, the combined drill with multi-stage drill in this embodiment includes a fixing rod 9, a middle drill 5 and a top drill 4, a bottom drill 6 is disposed at the upper end of the fixing rod 9, the middle drill 5 is disposed at the upper end of the bottom drill 6, the top drill 4 is disposed at the upper end of the middle drill 5, a drill tip 1 is formed at the top end of the top drill 4, drill blades 2 are formed on the bottom drill 6, the middle drill 5 and the top drill 4, chip cutting grooves 3 are formed between the drill blades 2, the drill blades 2 start drilling by high-speed rotation of the combined drill, and waste chips generated during drilling are discharged through the chip cutting grooves 3, a wedge 10 is disposed at one side of the periphery of the fixing rod 9, a square block 11 is disposed at the bottom of the fixing rod 9, a conical head 12 is disposed at the bottom of the square block 11, threaded rods 7 are disposed at the top ends of, the bottom of the middle bit 5 and the top bit 4 are both provided with thread grooves 8.

As shown in fig. 1-3, in this embodiment, bottom drill 6 and dead lever 9 welding, can be with bottom drill 6 fixed connection on dead lever 9, improve the holistic stability of drill, middle part drill 5 is connected through thread groove 8 and threaded rod 7 with bottom drill 6, convenient to detach installs, the combination is more nimble various, improve the result of use, top drill 4 is connected through thread groove 8 and threaded rod 7 with middle part drill 5, can drill through top drill 4, carry out the reaming through middle part drill 5 afterwards, or processing step hole, high durability and convenient use.

As shown in fig. 1-3, in this embodiment, the wedge 10 is formed on the fixing rod 9, so as to improve the roughness of the surface of the fixing rod 9, so that the drilling tool can better clamp the drill bit, the square 11 is formed at the bottom of the fixing rod 9, and the conical head 12 is formed at the bottom of the square 11, so as to guide the installation of the drill bit, thereby improving the positioning accuracy of the drill bit.

The specific implementation process of this embodiment is as follows: during the use, can be according to the drilling demand, nimble equipment top drill bit 4, middle part drill bit 5 and bottom drill bit 6, when the equipment, can connect together the thread groove 8 of top drill bit 4 and the threaded rod 7 on middle part drill bit 5 top soon, then link together the thread groove 8 of middle part drill bit 5 bottom and the threaded rod 7 of bottom drill bit 6, after the combination drill bit combination is installed, install on the drilling tool through square 11 and conical head 12 guide combination drill bit, can improve the roughness on dead lever 9 surface through wedge 10, thereby make the drilling tool can press from both sides tight drill bit better, then begin to drill, can aim at drilling central point through drill point 1, then rotate at a high speed through the combination drill bit, make drill edge 2 begin to drill, and discharge the sweeps that produces through chip groove 3 in with the drilling process.

The above-described embodiments are merely illustrative of the preferred embodiments of the present invention and are not intended to limit the spirit and scope of the present invention. Without departing from the design concept of the present invention, various modifications and improvements made by the technical solution of the present invention by those skilled in the art should fall into the protection scope of the present invention, and the technical contents claimed by the present invention have been fully recorded in the claims.

Claims

1. A composite drill bit having a multi-stage drill bit, comprising: comprises a fixed rod (9), a middle drill bit (5) and a top drill bit (4), wherein a bottom drill bit (6) is arranged at the upper end of the fixed rod (9), the middle drill bit (5) is arranged at the upper end of the bottom drill bit (6), the top drill bit (4) is arranged at the upper end of the middle drill bit (5), a drill point (1) is formed at the top end of the top drill bit (4), a wedge block (10) is arranged at one side of the periphery of the fixed rod (9), a square block (11) is arranged at the bottom of the fixed rod (9), a conical head (12) is arranged at the bottom end of the square block (11), a threaded rod (7) is arranged at the top end of the middle drill bit (5) and the bottom drill bit (6), the bottoms of the middle drill bit (5) and the top drill bit (4) are both provided with thread grooves (8).

2. The composite drill bit of claim 1, wherein: the bottom drill bit (6) is welded with the fixing rod (9).

3. The composite drill bit of claim 1, wherein: the middle drill bit (5) is connected with the bottom drill bit (6) through the thread groove (8) and the threaded rod (7).

4. The composite drill bit of claim 1, wherein: the top drill bit (4) and the middle drill bit (5) are connected through the thread groove (8) and the threaded rod (7).

5. The composite drill bit of claim 1, wherein: the wedge-shaped block (10) is formed on the fixing rod (9).

6. The composite drill bit of claim 1, wherein: the square block (11) is formed at the bottom of the fixing rod (9), and the conical head (12) is formed at the bottom of the square block (11).