CN209736717U

CN209736717U - Deep hole drill

Info

Publication number: CN209736717U
Application number: CN201920350632.9U
Authority: CN
Inventors: 覃统
Original assignee: Shenzhen Zhongke Innovation Precision Technology Co Ltd
Current assignee: Shenzhen Zhongke Innovation Precision Technology Co Ltd
Priority date: 2019-03-19
Filing date: 2019-03-19
Publication date: 2019-12-06
Anticipated expiration: 2029-03-19

Abstract

The utility model provides a deep hole drill bit, include: the drill rod is smaller than the cutting tool in diameter, the lower end of the drill handle is connected with the upper end of the drill rod, the lower end of the drill rod is connected with the upper end of the cutting tool, at least one guide boss is formed on the circumferential outer surface of the drill rod in a protruding mode, and the diameter of the guide boss is the same as that of the cutting tool. The utility model discloses set up the direction boss in the outside of drilling rod, consequently at the in-process of deep hole drill, can utilize the direction boss and the deep hole inner wall between mutually supporting that drills out, utilize the minimum contact surface of direction boss and pore wall friction to reach and right the effect to the drilling rod, both can reach and right the drilling rod and improve drilling accuracy effect, also avoided simultaneously between drilling rod large tracts of land and the pore wall friction and because of drilling rod overlength produces harmful effects such as swing to the quality and the precision of drilling have been improved.

Description

deep hole drill

Technical Field

the utility model relates to a deep hole bores technical field, in particular to deep hole drill bit.

Background

Fig. 1 and 2 show schematic structural views of a deep hole drill in the prior art. As shown in fig. 1 and 2, in order to reduce friction between the drill rod and the hole wall, the diameter of the drill rod 2 is generally smaller than that of the cutting tool 1, so that the drill rod 2 is not in contact with the hole wall during the deep hole drilling process, but the drill rod 2 cannot provide a good centering effect due to swinging caused by too long length due to the deep hole drilling process, thereby affecting the drilling quality and precision.

SUMMERY OF THE UTILITY MODEL

The utility model provides a deep hole drill bit to solve above-mentioned technical problem.

In order to solve the above problems, according to an aspect of the present invention, there is provided a deep hole drill, including: the drill rod is smaller than the cutting tool in diameter, the lower end of the drill handle is connected with the upper end of the drill rod, the lower end of the drill rod is connected with the upper end of the cutting tool, at least one guide boss is formed on the circumferential outer surface of the drill rod in a protruding mode, and the diameter of the guide boss is the same as that of the cutting tool.

Preferably, a side of the guide boss facing the cutting tool is formed as an inclined lead angle.

Preferably, a plurality of guide bosses are arranged on the drill rod, and the guide bosses are distributed at intervals along the axial direction of the drill rod.

In the technical scheme, the utility model discloses set up the direction boss in the outside of drilling rod, consequently at the in-process of deep hole brill, can utilize the direction boss and the deep hole inner wall that drills out between mutually support, lead to the drilling rod and right to the precision of drilling has been improved.

Drawings

FIG. 1 schematically illustrates a perspective view of a prior art deep hole drill;

FIG. 2 schematically illustrates a front view of a prior art deep hole drill bit;

Fig. 3 schematically shows a perspective view of a deep hole drill according to the invention;

Fig. 4 schematically shows a front view of a deep hole drill according to the invention;

FIG. 5 schematically shows an enlarged view of section A of FIG. 4;

Fig. 6 schematically shows a schematic diagram of a specific implementation of the present invention. .

Reference numbers in the figures: 1. a cutting tool; 2. a drill stem; 3. a drill shank; 4. a guide boss; 5. guiding an angle; 6. and (5) a workpiece.

Detailed Description

The embodiments of the invention will be described in detail below with reference to the drawings, but the invention can be implemented in many different ways as defined and covered by the claims.

The utility model discloses an aspect provides a deep hole drill bit, include: the drill rod comprises a cutting tool 1, a drill rod 2 and a drill handle 3, wherein the diameter of the drill rod 2 is smaller than that of the cutting tool 1, the lower end of the drill handle 3 is connected with the upper end of the drill rod 2, the lower end of the drill rod 2 is connected with the upper end of the cutting tool 1, at least one guide boss 4 is convexly formed on the circumferential outer surface of the drill rod 2, and the diameter of the guide boss 4 is the same as that of the cutting tool 1.

when deep hole drilling is carried out, as shown in fig. 6, when a drill bit drills a hole on a workpiece 6, the drill rod can be centered by contacting the guide boss 4 with the hole wall when the drill bit drills to a certain depth; because of only direction boss 4 rubs with minimum contact surface and pore wall, like this the utility model discloses both can reach and right the drilling rod and improve drilling precision effect and also avoided simultaneously friction between drilling rod large tracts of land and the pore wall and because of drilling rod overlength produces harmful effects such as swing. A

In the technical scheme, the utility model discloses set up direction boss 4 in the outside of drilling rod 2, consequently at the in-process that the deep hole bored, can utilize the direction boss 4 and the deep hole inner wall that drills out between mutually supporting, lead to rightting drilling rod 2 to the precision of drilling has been improved.

Preferably, the side of the guide boss 4 facing the cutting tool 1 is formed as an inclined chamfer 5. In this way, the guide boss 4 can be conveniently and smoothly entered into the drilled deep hole.

preferably, a plurality of guide bosses 4 are arranged on the drill rod 2, and the guide bosses 4 are distributed at intervals along the axial direction of the drill rod 2.

the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A deep hole drill, comprising: the drilling tool comprises a cutting tool (1), a drill rod (2) and a drill handle (3), wherein the diameter of the drill rod (2) is smaller than that of the cutting tool (1), the lower end of the drill handle (3) is connected with the upper end of the drill rod (2), the lower end of the drill rod (2) is connected with the upper end of the cutting tool (1), at least one guide boss (4) is formed on the circumferential outer surface of the drill rod (2) in a protruding mode, and the diameter of the guide boss (4) is the same as that of the cutting tool (1).

2. Deep hole drill according to claim 1, characterized in that the side of the guide boss (4) facing the cutting tool (1) is formed as an inclined lead angle (5).

3. Deep hole drill bit according to claim 1, characterized in that a plurality of guide bosses (4) are provided on the drill rod (2), said guide bosses (4) being spaced apart in the axial direction of the drill rod (2).