CN216966368U

CN216966368U - Deep hole twist type drill bit

Info

Publication number: CN216966368U
Application number: CN202122986636.6U
Authority: CN
Inventors: 贾文玉; 艾亚香
Original assignee: Changzhou Minghong Numerical Control Tools Co ltd
Current assignee: Changzhou Minghong Numerical Control Tools Co ltd
Priority date: 2021-12-01
Filing date: 2021-12-01
Publication date: 2022-07-15
Anticipated expiration: 2031-12-01

Abstract

The utility model discloses a deep-hole hemp-flower type drill bit, which relates to the technical field of drill bits and comprises a drill bit body, wherein a clamping part is arranged at the top end of the drill bit body, a guide sleeve is arranged outside the bottom end of the drill bit body and is used for guiding the axial movement of the drill bit body, a connecting ring is rotatably arranged outside the clamping part, an upper connecting rod is rotatably connected to the outer side of the connecting ring, a lower connecting rod is rotatably connected to the outer side of the top end of the guide sleeve, and the end parts of the upper connecting rod and the lower connecting rod are mutually rotatably connected. According to the utility model, the guide sleeve is arranged outside the drill bit body, and is used for guiding and supporting the middle part of the drill bit body, so that when the drill bit body is too thin, the guide sleeve supports the middle part of the drill bit body, and the drill bit body cannot bend in the machining process, thereby effectively ensuring the machining accuracy, improving the stability and accuracy in machining a relatively thin deep hole, and greatly enhancing the use safety of the drill bit.

Description

Deep hole twist type drill bit

Technical Field

The utility model relates to the technical field of drill bits, in particular to a deep hole twist type drill bit.

Background

Drills (Drills) are tools used to drill through or blind holes in solid materials and to ream existing holes. Commonly used drill bits include twist drills, flat drills, center drills, deep hole drills, and trepanning drills. In metal cutting, the hole drilling process accounts for about 40-50% of the total cutting process, especially more in the aerospace and automobile industries, and the production of drill bits accounts for about 60% of the total cutter production. Among them, the twist drill is one of the most common hole drilling tools and is also one of the tools with the largest loss amount in the mechanical cutting process, and the deep hole twist drill is used for deep hole processing in which the ratio of the drilling depth to the drilling diameter is not less than 12.

When some apertures are small and deep hole sites are processed, the diameter of the twist drill is small, so that the structural strength of the drill is high, the twist drill is long, the twist drill is easy to be subjected to pressure to generate bending fracture in actual processing, and even if the twist drill is not fractured, the processing precision of the deep hole can be influenced, and the processing effect is poor.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a deep hole twist type drill bit, which aims to overcome the defects in the prior art.

In order to achieve the above purpose, the utility model provides the following technical scheme: the utility model provides a deep hole sesame flower type drill bit, includes the drill bit body, the top of drill bit body is provided with the clamping part, the outside of drill bit body bottom is provided with the uide bushing, the uide bushing leads the axial displacement of drill bit body, the go-between is installed in the outside rotation of clamping part, the outside of go-between is rotated and is connected with the connecting rod, the outside on uide bushing top is rotated and is connected with lower connecting rod, the tip rotation of going up connecting rod and lower connecting rod is connected.

Preferably, the upper connecting rods outside the connecting rings and the lower connecting rods outside the guide sleeves are arranged into multiple groups, and the multiple groups of upper connecting rods and the multiple groups of lower connecting rods are uniformly distributed in the circumferential direction.

Preferably, an inner concave ring groove is formed in the outer portion of the clamping portion, and the connecting ring is rotatably installed in the inner concave ring groove.

Preferably, the inner side of the connecting ring is provided with a ball groove, and a ball is arranged between the ball and the clamping part.

Preferably, the upper connecting rod and the lower connecting rod are rotatably connected through a torsion spring.

Preferably, the bottom end of the guide sleeve is fixedly connected with the pressure plate, and a scrap outlet is formed in the position, close to the pressure plate, of the guide sleeve.

Preferably, a guide rotating wheel is rotatably arranged inside the side wall of the guide sleeve.

In the technical scheme, the utility model provides the following technical effects and advantages:

according to the utility model, the guide sleeve is arranged outside the drill bit body, the guide sleeve is pushed to be clung to the surface of a workpiece through the connection of the upper connecting rod and the lower connecting rod, the middle part of the drill bit body is guided and supported by the guide sleeve, no deviation in the axial direction of the drill bit body can be ensured when the drill bit body is guided by the guide sleeve, and further, when the drill bit body is too thin, the middle part of the drill bit body is supported by the guide sleeve, and no bending is generated in the machining process, so that the machining accuracy can be effectively ensured.

Drawings

In order to more clearly illustrate the embodiments of the present application or technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments described in the present invention, and other drawings can be obtained by those skilled in the art according to the drawings.

Fig. 1 is a schematic view of the overall structure of the present invention.

Fig. 2 is a top view of the guide sleeve of the present invention.

Fig. 3 is an enlarged view of the structure of the clamping portion of fig. 1 according to the present invention.

Description of reference numerals:

1. a drill bit body; 11. a clamping portion; 12. an inner concave ring groove; 2. a connecting ring; 21. an upper connecting rod; 3. a guide sleeve; 31. a lower connecting rod; 32. a platen; 33. a guide runner; 34. a chip outlet; 4. and a ball.

Detailed Description

In order to make the technical solutions of the present invention better understood, those skilled in the art will now describe the present invention in further detail with reference to the accompanying drawings.

Example 1

The utility model provides a deep hole twist drill bit as shown in figures 1-3, which comprises a drill bit body 1, wherein the top end of the drill bit body 1 is provided with a clamping part 11, the outside of the bottom end of the drill bit body 1 is provided with a guide sleeve 3, the guide sleeve 3 guides the axial movement of the drill bit body 1, the outside of the clamping part 11 is rotatably provided with a connecting ring 2, the outer side of the connecting ring 2 is rotatably connected with an upper connecting rod 21, the outer side of the top end of the guide sleeve 3 is rotatably connected with a lower connecting rod 31, and the end parts of the upper connecting rod 21 and the lower connecting rod 31 are rotatably connected with each other;

further, in the above technical solution, the upper connecting rods 21 outside the connecting ring 2 and the lower connecting rods 31 outside the guide sleeve 3 are all provided in multiple groups, and the multiple groups of upper connecting rods 21 and lower connecting rods 31 are uniformly distributed circumferentially, so that the stability of connection between the connecting ring 2 and the guide sleeve 3 can be ensured, and the guide sleeve is ensured to move accurately only along the axial direction of the drill body 1;

further, in the above technical solution, an inner concave ring groove 12 is formed outside the clamping portion 11, and the connecting ring 2 is rotatably installed in the inner concave ring groove 12, so as to ensure the installation stability of the connecting ring 2;

further, in the above technical solution, the inner side of the connecting ring 2 is provided with a ball groove, and the balls 4 are arranged between the balls 4 and the clamping part 11, so as to reduce friction between the connecting ring 2 and the clamping part 11;

further, in the above technical solution, the upper connecting rod 21 and the lower connecting rod 31 are rotatably connected through a torsion spring, and further the upper connecting rod 21 and the lower connecting rod 31 can be pushed to automatically unfold, that is, the guide sleeve 3 is pushed to automatically move away from the connecting ring 2;

example 2

The deep hole twist-type drill bit shown in fig. 1-2 comprises a drill bit body 1, wherein a clamping part 11 is arranged at the top end of the drill bit body 1, a guide sleeve 3 is arranged outside the bottom end of the drill bit body 1, the guide sleeve 3 guides axial movement of the drill bit body 1, a connecting ring 2 is rotatably mounted outside the clamping part 11, an upper connecting rod 21 is rotatably connected to the outer side of the connecting ring 2, a lower connecting rod 31 is rotatably connected to the outer side of the top end of the guide sleeve 3, and end parts of the upper connecting rod 21 and the lower connecting rod 31 are rotatably connected with each other;

further, in the above technical scheme, a pressure plate 32 is fixedly connected to the bottom end of the guide sleeve 3, and a scrap outlet 34 is formed in a position of the guide sleeve 3 close to the pressure plate 32, so that stable attachment of the guide sleeve 3 to a workpiece is ensured, and effective removal of scraps is ensured;

further, in the above technical solution, a guiding runner 33 is rotatably installed inside the side wall of the guiding sleeve 3, so as to stably support the rotation of the drill bit body 1;

the working principle is as follows: by arranging the guide sleeve 3 outside the drill bit body 1, in actual use, the clamping part 11 is arranged on a machine, and then the upper connecting rod 21 and the lower connecting rod 31 are connected and driven by a torsion spring between the upper connecting rod 21 and the lower connecting rod 31 to push the upper connecting rod 21 and the lower connecting rod 31 to automatically expand so as to push the guide sleeve 3 to be clung to the surface of a workpiece, so that in actual use, the middle part of the drill bit body 1 can be guided and supported by the guide sleeve 3, and the guide sleeve 3 only moves along the axial direction of the drill bit body 1 by utilizing the connection of a plurality of groups of the upper connecting rods 21 and the lower connecting rods 31, further, when the drill bit body 1 is guided by the guide sleeve 3, no deviation in the axial direction of the drill bit body 1 can be ensured, further, when the drill bit body 1 is too thin, the middle part is supported by the guide sleeve 3, no bending is generated in the processing process, and thus the processing accuracy can be effectively ensured, and because go-between 2 rotates and installs in the outside of clamping part 11, consequently uide bushing 3 does not rotate along with drill bit body 1, and utilize direction runner 33 to cooperate the support to the rotation of drill bit body 1, and at the continuous in-process of feeding of drill bit body 1, go-between 2 is close to uide bushing 3 gradually, carry out folding compression to last connecting rod 21 and lower connecting rod 31, and then can guarantee constantly that uide bushing 3 carries out the guide support to drill bit body 1 in the work piece outside, thereby very big improvement the stability and accurate nature when the fine deep hole adds man-hour, great reinforcing the security that the drill bit used.

While certain exemplary embodiments of the present invention have been described above by way of illustration only, it will be apparent to those of ordinary skill in the art that the described embodiments may be modified in various different ways without departing from the spirit and scope of the utility model. Accordingly, the drawings and description are illustrative in nature and should not be construed as limiting the scope of the utility model.

Claims

1. The utility model provides a deep hole sesame flower type drill bit, includes drill bit body (1), the top of drill bit body (1) is provided with clamping part (11), its characterized in that: the drill bit comprises a drill bit body (1), and is characterized in that a guide sleeve (3) is arranged outside the bottom end of the drill bit body (1), the guide sleeve (3) guides the axial movement of the drill bit body (1), a connecting ring (2) is installed on the outside of a clamping part (11) in a rotating mode, an upper connecting rod (21) is connected to the outside of the connecting ring (2) in a rotating mode, a lower connecting rod (31) is connected to the outside of the top end of the guide sleeve (3) in a rotating mode, and the upper connecting rod (21) and the lower connecting rod (31) are connected in a rotating mode.

2. The deep hole twist drill according to claim 1, characterized in that: the upper connecting rods (21) outside the connecting rings (2) and the lower connecting rods (31) outside the guide sleeves (3) are arranged into multiple groups, and the multiple groups of the upper connecting rods (21) and the lower connecting rods (31) are uniformly distributed in the circumferential direction.

3. The deep hole twist drill according to claim 1, characterized in that: an inner concave ring groove (12) is formed in the outer portion of the clamping portion (11), and the connecting ring (2) is rotatably installed in the inner concave ring groove (12).

4. The deep hole twist drill according to claim 1, characterized in that: the inner side of the connecting ring (2) is provided with a ball groove, and a ball (4) is arranged between the ball (4) and the clamping part (11).

5. The deep hole twist drill according to claim 1, characterized in that: the upper connecting rod (21) is rotatably connected with the lower connecting rod (31) through a torsion spring.

6. The deep hole twist drill according to claim 1, characterized in that: the bottom fixedly connected with pressure disk (32) of uide bushing (3), chip outlet (34) have been seted up in the position that uide bushing (3) are close to pressure disk (32).

7. The deep hole twist drill according to claim 1, characterized in that: and a guide rotating wheel (33) is rotatably arranged in the side wall of the guide sleeve (3).