CN212070523U

CN212070523U - Drill bit for processing melt-blown fabric grinding tool

Info

Publication number: CN212070523U
Application number: CN202020666070.1U
Authority: CN
Inventors: 刘吉庆; 俞建星; 孙游; 王雪雪
Original assignee: HUAWEINA PRECISION TOOLS (KUNSHAN) CO LTD
Current assignee: Jinzhou Jinggong Technology (Kunshan) Co.,Ltd.
Priority date: 2020-04-27
Filing date: 2020-04-27
Publication date: 2020-12-04
Anticipated expiration: 2030-04-27

Abstract

The utility model discloses a drill bit for processing melt-blown fabric abrasive tools, which comprises a chuck clamping part at the rear part and a cutting part at the front part, wherein one end surface of the cutting part, which is far away from the chuck clamping part, is a cutting edge tip; the two helical flutes are provided with a subslot on the side remote from the chuck holding portion and corresponding to the main cutting edge, the subslot forming a third cutting edge at the tip. The drill bit for processing the melt-blown fabric abrasive tool has the advantages of simple structure, easiness in processing, low manufacturing cost, long service life, strong chip removal capacity, accuracy in positioning, high drilling precision and the like, so that the drill bit is suitable for the processing requirement of the abrasive tool for current melt-blown fabric.

Description

Drill bit for processing melt-blown fabric grinding tool

Technical Field

The utility model relates to a drill bit especially relates to a processing melt-blown spray is drill bit for grinding apparatus.

Background

With the increase of the use of the mask, the consumption of the melt-blown fabric is increased, the demand of the grinding tool for producing the melt-blown fabric is increased, and the machining drill of the grinding tool generally adopts a metal cutting drill point, so that the defects of insufficient precision, low production efficiency, high machining cost and the like exist.

Disclosure of Invention

In order to overcome the defects, the utility model provides a processing melt-blown spray is drill bit for grinding apparatus has improved production efficiency, has reduced the processing cost, has improved the machining precision simultaneously.

The utility model discloses a solve the technical scheme that its technical problem adopted and be: a drill bit for processing a melt-blown fabric abrasive tool comprises a chuck clamping part positioned at the rear part and a cutting part positioned at the front part, wherein one end surface of the cutting part, which is far away from the chuck clamping part, is a cutting edge, the surface of the cutting part is symmetrically provided with two spiral grooves along the axial direction of the cutting part, one sides of the two spiral grooves form symmetrical main cutting edges at the cutting edge respectively, one side, which is far away from the main cutting edge, of a grinding back between the two spiral grooves is concave inwards, a secondary cutting edge is formed at the cutting edge, and the other side of the grinding back forms a cutting edge zone; the two spiral flutes are provided with a subslot on a portion near the tip and on a side corresponding to the main cutting edge, the subslot forming a third cutting edge at the tip.

As a further improvement of the utility model, the helix angle of the spiral groove is 25-40 degrees.

As a further improvement of the utility model, the included angle between two main cutting edges is 100-110 degrees.

As a further improvement of the utility model, the core thickness taper of the drill point is 40-60 μm.

As a further improvement of the utility model, the diameter of the cutting part is 0.2 mm-3.175 mm.

As a further improvement of the utility model, the diameter of the clamping part of the chuck is 3.175 mm.

The utility model has the advantages that: the drill bit for processing the melt-blown fabric abrasive tool has the advantages of simple structure, easiness in processing, low manufacturing cost, long service life, strong chip removal capacity, accuracy in positioning, high drilling precision and the like, so that the drill bit is suitable for the processing requirement of the abrasive tool for current melt-blown fabric.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of another perspective structure of the apprentice 1;

FIG. 3 is an enlarged view of the portion A of FIG. 2;

FIG. 4 is a schematic view of the structure of the blade tip belonging to the primary school of experiment.

The following description is made with reference to the accompanying drawings:

1-a chuck clamping part; 2-a cutting portion;

3-cutting edge; 4-spiral groove;

5-main cutting edge; 6-secondary cutting edge;

7-blade zone; 8-subslot;

9-third cutting edge.

Detailed Description

The following description of the preferred embodiments of the present invention will be made in conjunction with the accompanying drawings.

Referring to fig. 1-4, for the utility model, a drill bit for processing melt-blown fabric abrasive tool, including chuck clamping part 1 that is located the rear portion and cutting part 2 that is located the front portion, an end face that this cutting part 2 keeps away from chuck clamping part 1 is the prong 3, the surface symmetry of cutting part 2 is equipped with two helicla flutes 4 along its axis direction, one side of two helicla flutes forms symmetrical main cutting edge 5 respectively at the prong 3, the one side indent that keeps away from main cutting edge on the back of a knife between two helicla flutes and form secondary cutting edge 6 at the prong, the opposite side of the back of a knife forms margin 7; the two helical flutes are provided, on the part close to the tip 3 and on the side corresponding to the main cutting edge, with a subslot 8 which forms a third cutting edge 9 at the tip.

The helix angle of the spiral groove 4 is 25-40 degrees, the included angle (namely the drill point angle) between the two main cutting edges 5 is 100-110 degrees, the core thickness taper of the drill point is 40-60 mu m, the diameter of the cutting part 2 is 0.2-3.175 mm, the diameter of the chuck clamping part 1 is 3.175mm, and the drill is processed by a high-cobalt-content hard alloy material.

The drill bit for processing the melt-blown fabric grinding tool is provided with two spiral grooves with the spiral angles of 25-40 degrees and sub-grooves to form a third cutting edge, the large spiral angle at the front end ensures dust exhaust capacity, and bad chip removal phenomenon cannot occur; meanwhile, the third cutting edge assists in cutting, so that the cutting capability of the drill bit is enhanced, and chip removal is guaranteed. The angle between the two main cutting edges is set to be 100-110 degrees, and the smaller drill point angle ensures that the phenomenon of inaccurate positioning can not occur when a round hole is drilled, thereby ensuring the drilling precision. In addition, the drill bit has special core thickness taper, so that the phenomenon of needle breakage caused by heat dissipation in the machining process is avoided, and the service life is prolonged.

Therefore, the drill bit for machining the melt-blown fabric abrasive tool has the advantages of simple structure, easiness in machining, low manufacturing cost, long service life, strong chip removal capability, accuracy in positioning, high drilling precision and the like, and meets the machining requirements of the existing melt-blown fabric abrasive tool.

In the previous description, numerous specific details were set forth in order to provide a thorough understanding of the invention. The foregoing description is only illustrative of the preferred embodiments of the invention, which can be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention. All the contents that do not depart from the technical solution of the present invention, any simple modification, equivalent change and modification made to the above embodiments according to the technical substance of the present invention all still belong to the protection scope of the technical solution of the present invention.

Claims

1. A drill for machining a meltblown abrasive tool, comprising a chuck holding portion (1) located at the rear and a cutting portion (2) located at the front, an end surface of the cutting portion (2) remote from the chuck holding portion (1) being a tip (3), characterized in that: the surface of the cutting part (2) is symmetrically provided with two spiral grooves (4) along the axial direction of the cutting part, one sides of the two spiral grooves form symmetrical main cutting edges (5) on the blade tip (3), one side, far away from the main cutting edges, of the back grinding between the two spiral grooves is concave inwards, a secondary cutting edge (6) is formed on the blade tip, and the other side of the back grinding forms a blade zone (7); the two helical flutes are provided, on the part close to the tip (3) and on the side corresponding to the main cutting edge, with subslots (8) which form a third cutting edge (9) at the tip.

2. The drill bit for machining a meltblown abrasive tool according to claim 1, wherein: the spiral angle of the spiral groove (4) is 25-40 degrees.

3. The drill bit for machining a meltblown abrasive tool according to claim 1, wherein: the included angle between the two main cutting edges (5) is 100-110 degrees.

4. The drill bit for machining a meltblown abrasive tool according to claim 1, wherein: the core thickness taper of the drill bit is 40-60 mu m.

5. The drill bit for machining a meltblown abrasive tool according to claim 1, wherein: the diameter of the cutting part (2) is 0.2 mm-3.175 mm.

6. The drill bit for machining a meltblown abrasive tool according to claim 1, wherein: the diameter of the clamping head clamping part (1) is 3.175 mm.