CN220074973U

CN220074973U - Cemented carbide drill bit for reaming

Info

Publication number: CN220074973U
Application number: CN202321499334.9U
Authority: CN
Inventors: 张陆芬; 李维彬; 张开勇
Original assignee: Chengdu Lingzuan Technology Development Co ltd
Current assignee: Chengdu Lingzuan Technology Development Co ltd
Priority date: 2023-06-13
Filing date: 2023-06-13
Publication date: 2023-11-24
Anticipated expiration: 2033-06-13

Abstract

The utility model discloses a hard alloy drill bit for reaming, and belongs to the technical field of reamer bits. The novel cutting tool comprises a base body, wherein a drill tip is arranged at the top of the base body, an arc blade and a fixed connection edge are arranged on the outer wall of the drill tip, a scraping blade I is arranged on the side wall of the fixed connection edge, an inclined plane is arranged at the bottom of the drill tip, an inclined slot is formed in the side wall of the inclined plane, a triangular edge is arranged on the outer wall of the base body, a scraping blade II is arranged on the side wall of the triangular edge, an elongated slot is formed in the side wall of the scraping blade II, a base column is arranged on the lower side of the base body, and a cutting blade is arranged on the outer wall of the base column. According to the utility model, the drill point with the arc blade and the scraping blade I is matched with the scraping blade II, so that the drill bit can quickly enter the hole during reaming, and the convenience of using the drill bit and the reaming efficiency of the drill bit are improved; through setting up the cutting edge that has drill point and the radiating block of louvre and louvre two, can dispel the heat to the drill bit when the drill bit reaming, avoid the drill bit overheated when using, be favorable to prolonging the life of drill bit.

Description

Cemented carbide drill bit for reaming

Technical Field

The utility model relates to the technical field of reamer bits, in particular to a hard alloy drill bit for reaming.

Background

A drill bit is a tool for drilling holes, typically made of metal, with sharp cutting edges. The drill bit may be used manually or mechanically, and its shape and size may be varied according to different drilling requirements. Drill bits are commonly used to drill wood, metal, plastic, and other materials.

A reamer bit is a drill bit for enlarging holes, and is generally used for processing materials such as wood, metal, plastic and the like. The cutting area of the drill bit is larger than that of a common drill bit, and the work can be completed more quickly. Common reamer bits have different shapes such as saw tooth shape, spiral shape, conical shape and the like, and proper bits can be selected according to different processing requirements.

Existing carbide drills for reaming have the following disadvantages: when the drill bit is used for reaming, the hole is too small or the drill bit is larger, the reaming bit enters the hole slowly, so that the expansion of the hole is not facilitated, and the reaming efficiency is affected; when the drill bit is used, the temperature of the drill bit can rise when the drill bit enters the object or the drilling speed is too high, so that the condition of sintering or annealing of the drill bit occurs, and the service life of the drill bit is affected.

Disclosure of Invention

1. Technical problem to be solved

The utility model aims to provide a hard alloy drill bit for reaming, which aims to solve the problems of low reaming speed and overheating of the drill bit in the prior art.

2. Technical proposal

The utility model provides a carbide drill bit for reaming, includes the base member, the base member top is provided with the drill point, the drill point outer wall is provided with arc sword and joint limit, joint limit lateral wall is provided with scrapes and moves sword first, the drill point bottom is provided with the inclined plane, the chute has been seted up to the inclined plane lateral wall, the base member outer wall is provided with the triangle limit, the triangle limit lateral wall is provided with scrapes and moves sword second, scrape and move sword second lateral wall and seted up the elongated slot, the base member downside is provided with the base member, the base member outer wall is provided with the cutting edge, the through-hole has been seted up to the inside through-hole that has been seted up of base member, the louvre second has been seted up to the base member outer wall, the base member lateral wall is provided with the radiating block, the radiating cavity has been seted up to the radiating plate in the radiating block inside.

Preferably, the top of the drill tip is provided with a top ball, and the through hole is formed in the top ball.

Preferably, the triangular edge is arranged between the drill point and the base column, and threads are formed at the bottom of the base column.

Preferably, the radiating block is arranged on the side wall of the cutting edge, and the outer wall of the base column is provided with a chip groove.

Preferably, the first radiating hole and the second radiating hole are connected to the side wall of the through hole, and the radiating block is of a triangular structure.

3. Advantageous effects

Compared with the prior art, the utility model has the advantages that:

according to the utility model, the drill point with the arc blade and the scraping blade I is matched with the scraping blade II, so that the drill bit can quickly enter the hole during reaming, and the convenience of using the drill bit and the reaming efficiency of the drill bit are improved; through setting up the cutting edge that has drill point and the radiating block of louvre and louvre two, can dispel the heat to the drill bit when the drill bit reaming, avoid the drill bit overheated when using, be favorable to prolonging the life of drill bit.

Drawings

FIG. 1 is a schematic diagram of the overall structure of the present utility model;

FIG. 2 is a schematic view of a scraping blade according to the present utility model;

FIG. 3 is a schematic diagram of a heat sink according to the present utility model;

the reference numerals in the figures illustrate: 100. a base; 110. a base column; 111. a chip removal groove; 120. a thread; 200. pushing a ball; 210. a drill tip; 211. arc blade; 220. a securing tab; 221. scraping a first blade; 230. an inclined plane; 231. a chute; 240. triangular edges; 241. scraping a second blade; 242. a long groove; 300. a through hole; 310. a first heat dissipation hole; 320. a second heat dissipation hole; 330. a heat dissipation block; 331. a cavity; 332. a heat dissipation plate; 340. cutting edge.

Detailed Description

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

In the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "configured to," "engaged with," "connected to," and the like are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

Referring to fig. 1-3, the present utility model provides a technical solution:

a cemented carbide drill bit for reaming, comprising a substrate 100;

in some embodiments, the drill bit is machined entirely from a single piece of cemented carbide.

The top of the base body 100 is provided with a drill tip 210, the outer wall of the drill tip 210 is provided with an arc edge 211 and a fixed connection edge 220, the side wall of the fixed connection edge 220 is provided with a scraping edge 221, the scraping edge 221 scrapes the hole wall when rotating to realize reaming, the bottom of the drill tip 210 is provided with an inclined plane 230, the side wall of the inclined plane 230 is provided with a chute 231, the chute 231 facilitates the waste chips generated by the rotation of the drill tip 210 to be discharged through the chute 231, meanwhile, the arrangement of the chute 231 and the inclined plane 230 increases the surface area of the drill tip 210, the contact area between the drill tip 210 and air is larger, the drill tip 210 is convenient for radiating, the outer wall of the base body 100 is provided with a triangle edge 240, the side wall of the triangle edge 240 is provided with a scraping edge two 241, the side wall of the scraping edge two 241 is provided with an elongated slot 242, the elongated slot 242 is convenient for discharging chips, the lower side of the base column 110 is provided with a cutting edge 340, when the hole is enlarged by using a hard alloy drill bit for reaming, when the drill bit is rotated, the arc blade 211 contacts the hole wall to expand the hole wall, then the scraping blade I221 rotates to expand the hole wall, finally the hole wall is expanded again by the scraping blade II 241 of the triangular edge 240, after the hole is expanded for three times from small to large for a short time, the whole drill bit can enter the hole rapidly, the cutting blade 340 of the base column 110 is utilized to cut and expand the hole, the through hole 300 is arranged in the base 100, the first heat dissipation hole 310 is arranged on the outer wall of the drill bit 210, the second heat dissipation hole 320 is arranged on the outer wall of the base 100, the heat dissipation block 330 is arranged on the side wall of the base column 110, the heat dissipation cavity 331 is arranged in the heat dissipation cavity 331, the heat dissipation plate 332 is arranged in the heat dissipation cavity 331, the contact area between the inside of the heat dissipation block 330 and the air is increased for the multi-layer structure, when the drill bit enters the hole, the drill bit 210 rubs with an object to generate heat, the heat enters the through hole 300 through the first radiating hole 310 to radiate, part of the heat of the matrix 100 enters the through hole 300 through the second radiating hole 320 to radiate, the generated heat can be transferred to the radiating block 330 when the cutting blade 340 cuts and reams the hole wall, and the radiating block 330 radiates heat by utilizing the cavity 331 in the inner part to cooperate with the radiating plate 332, so that the drill bit can radiate when the drill bit reams;

in some embodiments, a commercially available coolant may be added to the through hole 300, by which the heat dissipation effect of the entire drill bit is enhanced.

Specifically, the top of the drill tip 210 is provided with a top ball 200, and the top ball 200 is hemispherical, so that the drill tip 210 is aligned with the hole, and the through hole 300 is formed in the top ball 200.

Further, the triangle 240 is disposed between the drill point 210 and the base column 110, the bottom of the base column 110 is provided with a thread 120, and the thread 120 is used for connecting a drill bit and an electric drill.

It should be noted that, the heat dissipating block 330 is disposed on a side wall of the cutting edge 340, and the outer wall of the base column 110 is provided with a chip removing groove 111, and the chip removing groove 111 is convenient for discharging the waste chips generated by reaming the drill bit.

It is noted that, the first heat dissipating holes 310 and the second heat dissipating holes 320 are connected to the side wall of the through hole 300, the first heat dissipating holes 310 are round holes, the second heat dissipating holes 320 are square holes, and the heat dissipating blocks 330 are triangular structures;

in some embodiments, the change in the heat dissipation efficiency of the heat dissipation block 330 may be achieved by changing the size of the heat dissipation block 330 in coordination with the maximum outer diameter of the drill bit.

The working principle is as follows; when the hole is enlarged by using the hard alloy drill bit for reaming, the drill bit is connected to the electric drill through the screw threads 120, when the drill bit rotates, the top ball 200 of the drill tip 210 of the drill bit is aligned to the hole, the arc blade 211 contacts the hole wall to enlarge the hole wall, then the scraping blade I221 rotates to enlarge the hole wall, and finally the hole wall is enlarged again by the scraping blade II 241 of the triangular edge 240, so that the whole drill bit can quickly enter the hole after the hole is temporarily enlarged from small to large three times, and the cutting blade 340 of the base column 110 is utilized for cutting and reaming the hole, so that the drill bit can quickly enter the hole during reaming, and the convenience of the use of the drill bit and the reaming efficiency of the drill bit are increased. When the drill bit enters the hole, the drill bit 210 rubs with an object to generate heat, the heat enters the through hole 300 through the first heat dissipation hole 310 to dissipate heat, part of heat of the matrix 100 enters the through hole 300 through the second heat dissipation hole 320 to dissipate heat, the generated heat can be transferred to the heat dissipation block 330 when the cutting edge 340 cuts and reams the hole wall, and the heat dissipation block 330 utilizes the cavity 331 in the inside to cooperate with the heat dissipation plate 332 to dissipate heat of the drill bit when the drill bit reams, so that overheating of the drill bit when the drill bit is used is avoided, and the service life of the drill bit is prolonged.

The foregoing has shown and described the basic principles, principal features and advantages of the utility model. It will be understood by those skilled in the art that the present utility model is not limited to the above-described embodiments, and that the above-described embodiments and descriptions are only preferred embodiments of the present utility model, and are not intended to limit the utility model, and that various changes and modifications may be made therein without departing from the spirit and scope of the utility model as claimed. The scope of the utility model is defined by the appended claims and equivalents thereof.

Claims

1. A cemented carbide drill bit for reaming comprising a substrate (100), characterized in that: the top of the base body (100) is provided with a drill point (210), the outer wall of the drill point (210) is provided with an arc blade (211) and a fixedly connected edge (220), the side wall of the fixedly connected edge (220) is provided with a scraping blade I (221), the bottom of the drill point (210) is provided with an inclined plane (230), the side wall of the inclined plane (230) is provided with a chute (231), the outer wall of the base body (100) is provided with a triangular edge (240), the side wall of the triangular edge (240) is provided with a scraping blade II (241), the side wall of the scraping blade II (241) is provided with a long groove (242), the utility model discloses a heat dissipation device, including base body (100), base body (110) outer wall is provided with cutting edge (340), through-hole (300) have been seted up to base body (100), radiating hole one (310) have been seted up to drill point (210) outer wall, radiating hole two (320) have been seted up to base body (100) outer wall, base body (110) lateral wall is provided with heat dissipation piece (330), heat dissipation cavity (331) have been seted up to heat dissipation piece (330) inside, heat dissipation cavity (331) inside is provided with heating panel (332).

2. A cemented carbide drill bit for reaming as claimed in claim 1, wherein: the top of the drill point (210) is provided with a top ball (200), and the through hole (300) is formed in the top ball (200).

3. A cemented carbide drill bit for reaming according to claim 2, characterized by: the triangular edge (240) is arranged between the drill point (210) and the base column (110), and threads (120) are formed at the bottom of the base column (110).

4. A cemented carbide drill bit for reaming according to claim 3, characterized by: the radiating block (330) is arranged on the side wall of the cutting edge (340), and the outer wall of the base column (110) is provided with a chip removal groove (111).

5. A cemented carbide drill bit for reaming as claimed in claim 4, wherein: the first radiating hole (310) and the second radiating hole (320) are connected to the side wall of the through hole (300), and the radiating block (330) is of a triangular structure.