CN212042815U

CN212042815U - Drill bit

Info

Publication number: CN212042815U
Application number: CN202020281978.0U
Authority: CN
Inventors: 李永; 贺旭波; 岳进; 蒋益民; 李军旗
Original assignee: Jincheng Hongren Technology Co Ltd
Current assignee: Jincheng Fulian Hongren Technology Co ltd
Priority date: 2020-03-09
Filing date: 2020-03-09
Publication date: 2020-12-01
Anticipated expiration: 2030-03-09

Abstract

The utility model provides a drill bit, include the handle of a knife and locate the cutting part of handle of a knife one end. The cutting part comprises a cutting surface, a transition surface, a chip groove and a peripheral edge; the cutting surface is a crescent plane, one end of the cutting surface is provided with a blade tip, and the blade tip is connected with the peripheral blade; one end of the cutting surface, which is far away from the blade tip, is connected with the chip groove through a transition surface; the peripheral edge comprises a chamfer and is connected with the edge tip of the cutting surface through the chamfer. The drill bit cuts through the cutting surface designed into the crescent plane, so that the abrasion of the cutter head is slowed down, the wear resistance of the cutter head is improved, and the strength and the impact resistance of the blade tip are improved; the blade tip is connected with the peripheral blade through a chamfer, so that the strength of the drill bit is improved, and the blade is prevented from tipping from the edge in the machining process; the cutting face is connected with the blade tip through the transition face, so that the machining process is smoother, the strength of the drill bit is improved, the service life of the drill bit is prolonged, and the abrasion of the cutting part can be reduced.

Description

Drill bit

Technical Field

The utility model relates to the field of machining, especially, relate to a drill bit.

Background

With the increasingly white competition of the electronic industry market, the requirements of customers on products are more and more stringent. When a product with high hardness, good toughness and low heat conductivity coefficient is processed, if a tool commonly used in the market is used for processing, the tool tip of the tool and the groove tip of the chip groove are easy to collapse, so that the axial force is too large to cause tool breakage, and the processed product is damaged or has poor quality.

SUMMERY OF THE UTILITY MODEL

In view of the above, it is necessary to provide a drill to solve the above problems.

A drill bit comprises a cutter handle and a cutting part arranged at one end of the cutter handle, wherein the cutting part comprises a cutting surface, a transition surface, a chip groove and a peripheral edge;

one end of the cutting surface is provided with a blade tip which is connected with the peripheral blade;

one end of the cutting surface, which is far away from the cutting tip, is connected with the chip groove through the transition surface;

the peripheral edge comprises a chamfer, and the peripheral edge is connected with the edge tip of the cutting surface through the chamfer.

Further, the cutting surface is a crescent plane.

Further, the drill comprises two cutting parts, and the two cutting parts are helical and are arranged in a central symmetry mode relative to the central axis of the tool holder;

the cutting edge is arranged at one end, far away from the central axis, of the cutting face, and the transition face and the chip groove are arranged close to the central axis.

Further, the included angle G of the planes where the inclined surfaces of the two chamfers are positioned ranges from 75 to 135 degrees.

Further, the chip groove of each cutting part is arranged at one end, far away from the cutting face, of the other cutting part.

Further, the distance between the two blade tips in the direction perpendicular to the central axis is d;

the extension distance L of the chamfer in the direction of the central axis is in the range of (0.04-0.08) d.

Further, the width e of the tip is in the range of (0.15-0.55) L.

Further, the arc surface length R of the transition surface ranges from (0.1-0.2) d.

Further, the peripheral edge gradually shrinks in an arc shape from the chamfer angle to the end far away from the chamfer angle.

The drill bit provided by the utility model can cut through the cutting surface designed into the crescent plane, thereby slowing down the abrasion of the cutter head, improving the wear resistance of the cutter head, and simultaneously improving the strength and impact resistance of the blade tip; the blade tip is connected with the peripheral blade through a chamfer, so that the strength of the drill bit is improved, and the blade is prevented from tipping from the edge in the machining process; the cutting face is connected with the blade tip through the transition face, so that the machining process is smoother, the strength of the drill bit is improved, the service life of the drill bit is prolonged, and the abrasion of the cutting part can be reduced.

The utility model provides a drill bit compares in traditional cutter, can overcome the knife tip that traditional cutter exists and the groove point of chip pocket during processing product and take place easily to collapse and lack, thereby leads to the axial force too big arouse disconnected sword and the damage or the quality subalternation problem of being processed the product. Meanwhile, the drill bit has the characteristics of high structural strength, convenience, easiness in use and controllable cost.

Drawings

Fig. 1 is a perspective view of a drill according to an embodiment of the present invention.

FIG. 2 is a side view of the drill bit shown in FIG. 1.

Fig. 3 is a front view of the drill bit shown in fig. 3.

Fig. 4 is a partial enlarged view of the portion of the drill bit IV shown in fig. 2.

Description of the main elements

Drill bit 100

Knife handle 10

Central axis 11

Cutting part 20

Cutting surface 21

Cutting edge 211

Transition surface 22

Chip pocket 23

Peripheral edge 24

Chamfer 241

The following detailed description of the invention will be further described in conjunction with the above-identified drawings.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

It will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. When an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Referring to fig. 1 to 3, the present invention provides a drill 100 for processing electronic products, wherein the drill 100 includes a shank 10 and a cutting portion 20 disposed at one end of the shank 10.

The cutting portion 20 includes a cutting face 21, a transition face 22, chip flutes 23 and peripheral edges 24. One end of the cutting surface 21 is provided with a cutting edge 211, and the cutting edge 211 connects the peripheral cutting edge 24. The end of the cutting surface 21 remote from the cutting edge 211 is connected to the chip flute 23 by a transition surface 22. The peripheral edge 24 includes a chamfer 241, and the peripheral edge 24 is connected to the cutting edge 211 of the cutting face 21 by the chamfer 241.

The drill bit 100 is used for replacing a traditional cutter to process products, and the cutting surface 21 is designed into a crescent plane, so that the abrasion of a cutter head can be reduced, the abrasion resistance of the cutter head is improved, and the strength and the impact resistance of the cutting edge 211 are improved; the blade tip 211 is connected with the peripheral blade 24 through the chamfer 241, so that the strength of the drill bit 100 is improved, and the blade tipping from the edge in the machining process is avoided; the cutting face 21 and the tip 211 are connected by the transition surface 22, so that the machining process is smoother, the strength of the drill bit 100 is improved, the service life of the drill bit is prolonged, and the abrasion of the cutting part 20 can be reduced.

Referring to fig. 1 to 4, in an embodiment, the drill 100 includes two cutting portions 20, and the two cutting portions 20 are helical and are disposed in a central symmetry manner with respect to the central axis 11 of the tool holder 10.

Particularly, the cutting surface 21 can be a crescent plane, and the crescent plane has a better processing angle in the actual processing process and is not easy to break.

Further, the tip 211 is provided at an end of the cutting face 21 remote from the central axis 11, and the transition face 22 and the chip flute 23 are provided adjacent to the central axis 11.

Further, the chip flute 23 of each cutting portion 20 is provided at an end of the other cutting portion 20 remote from the cutting face 21. That is, the two cutting portions 20 are disposed in cooperation, so that the volume of the cutting portion 20 is controlled within a range more suitable for practical requirements.

In the present embodiment, the drill 100 is used for processing a circular hole or a strip-shaped hole of a frame of an electronic product, but is not limited thereto.

Further, the angle G of the planes in which the slopes of the two chamfers 241 lie is in the range of 75-135 deg., preferably 90 deg..

The distance between the two tips 211 in the direction perpendicular to the center axis 11 (i.e., the diameter of the round hole to be machined) is set to d depending on the desired hole diameter of the workpiece to be machined.

Further, the extension distance L of the chamfer 241 in the direction of the central axis 11 is in the range of (0.04-0.08) d, preferably 0.06 d.

Further, the range of the width e of the tip 211 (i.e., the width of the junction of the tip 211 and the chamfer 241) is (0.15-0.55) L, preferably (0.2-0.5) L.

Further, the arc length R of the transition surface 22 is in the range of (0.1-0.2) d, preferably (0.12-0.15) d.

In the present embodiment, the peripheral edge 24 gradually shrinks from the chamfer 241 to an end away from the chamfer 241 in an arc shape, and finally shrinks to a point, that is, the peripheral edge is substantially triangular for matching the machining process.

During machining, the rotating cutting portion 20 contacts the workpiece and drills a hole of diameter d in the workpiece. Specifically, the cutting is completed by the cutting face 21, and the cut-off chips flow to the chip groove 23 via the transition face 22 and are discharged by the chip groove 23.

The drill bit 100 provided by the utility model can cut through the cutting surface 21 designed as the crescent plane, thereby slowing down the abrasion of the cutter head, improving the wear resistance of the cutter head, and simultaneously improving the strength and impact resistance of the blade tip 211; the blade tip 211 is connected with the peripheral blade 24 through the chamfer 241, so that the strength of the drill bit 100 is improved, and the blade tipping from the edge in the machining process is avoided; the cutting face 21 and the tip 211 are connected by the transition surface 22, so that the machining process is smoother, the strength of the drill bit 100 is improved, the service life of the drill bit is prolonged, and the abrasion of the cutting part 20 can be reduced.

The utility model provides a drill bit 100 compares in traditional cutter, can overcome the knife tip that traditional cutter exists and the groove point of chip pocket during processing product and take place easily and collapse scarcely, thereby leads to the too big damage or the quality subalternation problem that arouses disconnected sword and processed product of axial force. Meanwhile, the drill bit 100 has the characteristics of high structural strength, convenience, easiness in use and controllable cost.

In addition, other changes may be made by those skilled in the art without departing from the spirit of the invention, and it is intended that all such changes be considered within the scope of the invention.

Claims

1. A drill bit comprises a cutter handle and a cutting part arranged at one end of the cutter handle, and is characterized in that the cutting part comprises a cutting surface, a transition surface, a chip groove and a peripheral edge;

2. The drill bit of claim 1, wherein: the cutting surface is a crescent plane.

3. The drill bit of claim 1, wherein: the drill comprises two cutting parts, and the two cutting parts are both spiral and are arranged in central symmetry relative to the central axis of the tool holder;

4. The drill bit of claim 3, wherein: the included angle G of the planes of the inclined surfaces of the two chamfers ranges from 75 degrees to 135 degrees.

5. The drill bit of claim 3, wherein: the chip groove of each cutting part is arranged at one end, far away from the cutting face, of the other cutting part.

6. The drill bit of claim 3, wherein: the distance between the two blade tips along the direction vertical to the central axis is d;

the extension distance L of the chamfer in the direction of the central axis is in the range of 0.04-0.08 d.

7. The drill bit of claim 6, wherein: the width e of the tip is in the range of 0.15-0.55L.

8. The drill bit of claim 6, wherein: the arc surface length R of the transition surface ranges from 0.1 d to 0.2 d.

9. The drill bit of claim 1, wherein: the peripheral edge gradually shrinks from the chamfer angle to the end far away from the chamfer angle in an arc shape.