CN212329754U

CN212329754U - Novel PCB drill bit

Info

Publication number: CN212329754U
Application number: CN202020084837.XU
Authority: CN
Inventors: 刘能
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-01-15
Filing date: 2020-01-15
Publication date: 2021-01-12
Anticipated expiration: 2030-01-15

Abstract

The utility model discloses a novel PCB drill bit, which comprises a drill handle and a drill bit; the drill bit for drilling is fixed on the drill handle; the drill handle is detachably arranged on the rotating shaft; the screw thread structure also comprises a main thread groove and a secondary thread groove; the drill bit is provided with a main thread groove and a secondary thread groove; and the upper ends of the main thread groove and the secondary thread groove are positioned at two sides of the drill bit and at the lower end of the drill bit, and the lower ends of the main thread groove and the secondary thread groove are tangent. This neotype PCB drill bit is through setting up two thread grooves, and the bottom of two thread grooves is tangent, can increase the rigidity of drill bit, makes its life obtain promoting.

Description

Novel PCB drill bit

Technical Field

The utility model relates to a drill bit specifically is a novel PCB drill bit.

Background

The drill bit is a tool for drilling, the thread groove of most of the existing PCB drill bits is 180 degrees parallel to the tail part, and the design can lead to the fact that the drill bit is easy to break due to poor rigidity of the drill bit during drilling, so that the cost is increased. In order to prolong the service life of the drill bit, a drill bit which is not easy to break needs to be designed to meet the working requirement.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a novel PCB drill bit to solve the problem that proposes among the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme:

a novel PCB drill bit comprises a drill handle and a drill bit; the drill bit for drilling is fixed on the drill handle; the drill handle is detachably arranged on the rotating shaft; the screw thread structure also comprises a main thread groove and a secondary thread groove; the drill bit is provided with a main thread groove and a secondary thread groove; and the upper ends of the main thread groove and the secondary thread groove are positioned at two sides of the drill bit and at the lower end of the drill bit, and the lower ends of the main thread groove and the secondary thread groove are tangent.

As a further aspect of the present invention: the main thread groove has two thread angles which are 1: 40 degrees and 2: 38.8 degrees; the minor thread groove has three thread angles, which are 1: 40 degrees, 2: 50 degrees and 3: 40 degrees; the thread angles of the main thread groove and the secondary thread groove are gradually changed from the drill point at one end of the drill bit far away from the drill handle to one end of the drill bit close to the drill handle and are close to each other, and are tangent when the cutter is retracted at the tail part.

As a further aspect of the present invention: the main thread groove and the secondary thread groove are crossed at the upper end of the drill to form a side cutter and a side cutter depth; the depth of the side cutter is 0.01-0.015 mm; the width of the side knife 5 is 0.015-0.025 mm.

As a further aspect of the present invention: the width of the side cutter is 0.02 mm.

As a further aspect of the present invention: the distance between the edge cutter positioned at the upper end of the drill point and the edge cutter positioned at the lower end is 0.3-0.5 mm.

As a further aspect of the present invention: the distance between the edge knife at the upper end and the edge knife at the lower end is 0.4 mm.

As a further aspect of the present invention: the bottom end of the secondary thread groove is advanced by 0.05mm-0.15mm compared with the bottom end of the main thread groove.

As a further aspect of the present invention: the distance of the tool retracting in advance of the bottom end of the secondary thread groove compared with the bottom end of the main thread groove is 0.1 mm.

As a further aspect of the present invention: the diameter of the drill bit is 0.05-0.15 mm; the length of the drill bit is 0.7mm-3.0 mm.

As a further aspect of the present invention: a head UC is arranged on a drill point at the top of the drill bit, and a tail UC is arranged at the joint of the bottom of the drill bit and the drill handle; the length of the tail UC is 0.2-0.5mm, and the diameter of the tail UC is 0.003-0.005mm larger than the diameter of the bottom of the drill bit; the length of the head UC is 0.2-0.5mm, and the diameter of the head UC is 0.005-0.008mm larger than the diameter of the drill tip.

Compared with the prior art, the beneficial effects of the utility model are that: through setting up two thread grooves, and the bottom of two thread grooves is tangent, can increase the rigidity of drill bit, makes its life obtain promoting.

Drawings

Fig. 1 is a schematic structural diagram of a novel PCB drill.

Fig. 2 is a front view of fig. 1.

Fig. 3 is an enlarged schematic view of a drill part of the novel PCB drill.

Fig. 4 is a schematic structural diagram of a novel PCB drill UC.

Fig. 5 is a schematic structural view of a novel PCB drill bit middle head UC.

In the figure: 1-drill handle, 2-drill bit, 3-main thread groove, 4-secondary thread groove, 5-edge cutter, 6-edge cutter depth, 7-head UC and 8-tail UC.

Detailed Description

The technical solution of the present patent will be described in further detail with reference to the following embodiments.

Example 1

Referring to fig. 1-3, the present embodiment provides a novel PCB drill, including a drill shank 1 and a drill 2; the drill bit 2 for drilling is fixed on the drill handle 1; the drill handle 1 is detachably arranged on the rotating shaft; also comprises a main thread groove 3 and a secondary thread groove 4; the drill bit 2 is provided with a main thread groove 3 and a secondary thread groove 4; the upper ends of the main thread groove 3 and the secondary thread groove 4 are positioned at two sides of the drill bit 2 and at the lower end of the drill bit 2, and the lower ends of the main thread groove 3 and the secondary thread groove 4 are tangent; set up like this, become 0 degree from 180 degrees parallels gradually with the thread groove on the drill bit 2, can make the rigidity of drill bit 2 obtain promoting, and the pore wall is more smooth, and 2 toughness of drill bit are better.

The main thread groove 3 has two thread angles, which are 1: 40 degrees and 2: 38.8 degrees; the minor thread groove 4 has three thread angles, 1: 40 degrees, 2: 50 degrees and 3: 40 degrees; the thread angles of the main thread groove 3 and the secondary thread groove 4 are gradually changed from the drill point at one end of the drill bit 2 far away from the drill handle 1 to one end of the drill bit 2 close to the drill handle 1 and are tangent when the cutter is withdrawn at the tail part. Wherein 1: 40 degrees, 2: 50 degrees and 3: 40 degrees respectively represent that the first section of thread angle is 40 degrees, the first section of thread angle is 50 degrees, and the third section of thread angle is 40 degrees.

The main thread groove 3 and the secondary thread groove 4 form a side cutter 5 and a side cutter depth 6 at the upper end of the drill bit 2 in a crossed manner; the height of the side cutter depth 6 is 0.01-0.015 mm; the width of the side knife 5 is 0.015-0.025 mm.

The width of the side edge knife 5 is not limited, and in this embodiment, preferably, the width of the side edge knife 5 is 0.02 mm.

The distance between the side cutter 5 positioned at the upper end of the drill tip and the side cutter 5 positioned at the lower end is 0.3-0.5 mm; the distance between the edge blade 5 at the upper end and the edge blade 5 at the lower end is not limited, and in this embodiment, it is preferable that the distance between the edge blade 5 at the upper end and the edge blade 5 at the lower end is 0.4 mm.

The bottom end of the secondary thread groove 4 is advanced by 0.05mm-0.15mm compared with the bottom end of the main thread groove 3; the distance that the bottom end of the secondary thread groove 4 retracts the cutter in advance compared with the bottom end of the primary thread groove 3 is not limited, and in this embodiment, it is preferable that the distance that the bottom end of the secondary thread groove 4 retracts the cutter in advance compared with the bottom end of the primary thread groove 3 is 0.1 mm.

The working principle of the embodiment is as follows: become 0 degree from 180 degrees parallels gradually with the thread groove on the drill bit 2, can make the rigidity of drill bit 2 obtain promoting, and the pore wall is more smooth, and drill bit 2 toughness is better.

Example 2

The embodiment is further improved on the basis of the embodiment 1, and the improvement is as follows: the diameter of the drill bit 2 is 0.05-0.15mm, and the length of the drill bit 2 is 0.7-3.0 mm.

A head UC7 is arranged on the top drill point of the drill bit 2, and a tail UC8 is arranged at the joint of the bottom of the drill bit 2 and the drill shank 1; the length of the tail UC8 is 0.2-0.5mm, and the diameter of the tail UC8 is 0.003-0.005mm larger than the diameter of the bottom of the drill bit 2; the length of the head UC7 is 0.2-0.5mm, and the diameter of the head UC7 is 0.005-0.008mm larger than the diameter of a drill tip. Wherein UC is the abbreviation of Under Cut, and means the cutting depth of the part is a bit larger.

It should be noted that, as is obvious to a person skilled in the art, the invention is not limited to details of the above-described exemplary embodiments, but can be embodied in other specific forms without departing from the spirit or essential characteristics thereof.

Claims

1. A novel PCB drill bit comprises a drill handle (1) and a drill bit (2); the drill bit (2) for drilling is fixed on the drill handle (1); the drill handle (1) is detachably arranged on the rotating shaft; it is characterized by also comprising a main thread groove (3) and a secondary thread groove (4); a main thread groove (3) and a secondary thread groove (4) are formed in the drill bit (2); the drill bit is characterized in that the upper end of the drill bit (2) is provided with a main thread groove (3) and a secondary thread groove (4), the upper ends of the main thread groove and the secondary thread groove are arranged on two sides of the drill bit (2) and are arranged at the lower end of the drill bit (2), and the lower ends of the main thread groove (3) and the secondary thread groove (4) are tangent.

2. The new PCB drill bit according to claim 1, characterized in that the main thread groove (3) has two thread angles, 1: 40 degrees and 2: 38.8 degrees; the minor thread groove (4) has three thread angles which are 1: 40 degrees, 2: 50 degrees and 3: 40 degrees; the thread angles of the main thread groove (3) and the secondary thread groove (4) are gradually changed from the drill point at one end of the drill bit (2) far away from the drill handle (1) to one end of the drill bit (2) close to the drill handle (1) and are close to each other, and are tangent when a cutter is withdrawn at the tail part.

3. The novel PCB drill bit according to claim 2, characterized in that the primary thread groove (3) and the secondary thread groove (4) form a side cutter (5) and a side cutter depth (6) at the upper end of the drill bit (2) in a crossed manner; the height of the side cutter depth (6) is 0.01-0.015 mm; the width of the side knife (5) is 0.015-0.025 mm.

4. A new PCB drill bit according to claim 3, characterized in that the width of the edge blade (5) is 0.02 mm.

5. A novel PCB drill bit according to claim 3, characterized in that the distance between the edge knives (5) at the upper end of the drill tip and the edge knives (5) at the lower end is 0.3-0.5 mm.

6. The novel PCB drill bit according to claim 5, characterized in that the distance between the edge knives (5) at the upper end and the edge knives (5) at the lower end is 0.4 mm.

7. The PCB drill bit according to claim 3, characterized in that the bottom end of the minor thread groove (4) is retracted 0.05mm-0.15mm ahead of the bottom end of the major thread groove (3).

8. The PCB drill bit according to claim 7, characterized in that the distance of the bottom end of the minor thread groove (4) retracting ahead of the bottom end of the major thread groove (3) is 0.1 mm.

9. The new PCB drill bit according to claim 2, characterized in that the drill bit (2) has a diameter of 0.05-0.15 mm; the length of the drill bit (2) is 0.7mm-3.0 mm.

10. The new PCB drill bit as claimed in claim 1, wherein the drill bit (2) is provided with a head UC (7) on the top drill point; a tail UC (8) is arranged at the joint of the bottom of the drill bit (2) and the drill handle (1), the length of the tail UC (8) is 0.2-0.5mm, and the diameter of the tail UC is 0.003-0.005mm larger than the diameter of the bottom of the drill bit (2); the length of the head UC (7) is 0.2-0.5mm, and the diameter of the head UC is 0.005-0.008mm larger than the diameter of the drill tip.