CN210307296U

CN210307296U - Multipurpose stone drilling composite drill bit

Info

Publication number: CN210307296U
Application number: CN201921436488.7U
Authority: CN
Inventors: 杨嘉明
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-09-01
Filing date: 2019-09-01
Publication date: 2020-04-14
Anticipated expiration: 2029-09-01

Abstract

The utility model discloses a compound drill bit of multi-purpose trompil of stone material belongs to stone material processing cutter. Aims to provide a stone tapping drill integrating drilling, expanding and spot facing. The drilling bit comprises a drilling bit body, wherein a cutting head is formed by a first carborundum cutting layer (6) coated at the front end of a drill rod (5), and a water injection hole (2) is formed in the core part of the drilling bit body; a chip groove (7) is arranged on the outer cylindrical surface of the cutting head, one end of the chip groove extends downwards to the end surface of the cutting head and is communicated with the water injection hole (2), and the other end of the chip groove extends upwards to the outer cylindrical surface of the drill rod (5); the body is provided with a reaming head which consists of a cylindrical base body (4) fixedly connected with a drill handle (1) and a drill rod (5) and a second carborundum cutting layer (8) coating the outer cylindrical surface and the bottom surface of the base body, and the diameter of the reaming head is larger than that of the cutting head. The utility model discloses both can be used to drilling, can be used for reaming, counter sinking again, is a multipurpose composite drill bit.

Description

Multipurpose stone drilling composite drill bit

Technical Field

The utility model relates to a trompil drill bit for processing the stone material especially relates to a collect drilling, reaming, counter sinking multi-purpose trompil composite drill bit as an organic whole, belongs to stone material processing cutter.

Background

The stone tapping drill bit is an indispensable cutting tool for operations such as drilling, reaming, spot facing and the like in the process of manufacturing billiard table tops and processing architectural decoration stones, and generally comprises a drill handle, a drill rod and a cutting head; the cutting head is composed of a carborundum particle layer which is coated at the front end of the drill rod in a brazing mode to form a cylindrical structure. The drill bit with the structure is simple, but has the following defects:

1) and a chip removal groove is not formed, so that the chip removal is difficult. On one hand, the chips are easy to block cooling water holes of the drill rod, so that the cutting head is heated to cause black burning failure; on the other hand, the stone material has low thermal conductivity, and the cutting head is easy to expand by heating, so that stone holes are easy to crack and generate waste products.

2) Unsmooth chip removal can cause chips to be repeatedly ground by the cutting head, not only is the drilling efficiency low, but also the cutting head is easily rapidly abraded, and the service life is shortened.

3) The reaming head is not arranged, reaming or spot facing cannot be carried out, and the function is single.

Disclosure of Invention

In order to overcome the above-mentioned defect that exists among the prior art, the utility model aims at providing a long service life, drilling efficiency are high, collect bore, expand, ream the multi-purpose trompil composite drill of stone material as an organic whole.

In order to achieve the above purpose, the utility model adopts the following technical scheme: the cutting head is composed of a first carborundum cutting layer coated at the front end of the drill rod, and a core part of the body is provided with a water injection hole penetrating through two end surfaces of the body along the axial direction; a chip groove arranged along the bus direction is arranged on the outer cylindrical surface of the cutting head, one end of the chip groove extends downwards to the end surface of the cutting head and is communicated with the water injection hole, and the other end of the chip groove extends upwards to the outer cylindrical surface of the drill rod; the body is provided with a reaming head, the reaming head consists of a cylindrical base body fixedly connected with a drill handle and a drill rod and a second carborundum cutting layer coating the outer cylindrical surface and the bottom surface of the base body, and the diameter of the reaming head is larger than that of the cutting head.

A second chip groove arranged along the bus direction is formed in the outer cylindrical surface of the reaming head; the two second chip grooves are uniformly distributed by taking the axis of the reaming head as the center; the bottom surface of the reaming head is of an inverted cone structure.

Compared with the prior art, the utility model discloses owing to adopted above-mentioned technical scheme, consequently have following advantage:

1) the chip groove extending to the end face of the cutting head and communicated with the water injection hole is formed in the outer cylindrical surface of the cutting head, so that chips at the bottom of the stone hole can be guided to be discharged upwards. The defect that the cutting head is burnt due to the fact that a water injection hole is easily blocked is overcome, rapid abrasion of the cutting head by chips can be avoided, and the service life of the drill is effectively prolonged.

2) The chip groove can also eliminate the obstruction of chips to the cutting head, and the drilling efficiency is improved.

3) Because the chip groove is communicated with the water injection hole and is positioned on the outer cylindrical surface of the cutting head, cooling water can enter a gap between the outer cylindrical surface of the cutting head and the inner wall of the stone hole, so that the cutting head and the stone hole can be cooled, the expansion crack of the stone hole caused by the thermal expansion of the drill bit can be effectively avoided, and the processing qualified rate is improved.

4) Because the drill rod is provided with the reaming head, the drilling and reaming (or spot facing) can be realized by one-time drilling, and the two procedures are combined into one; the trouble that a large-diameter drill bit needs to be replaced when reaming or spot facing is avoided, the machining efficiency is further improved, and the reserve capacity of cutters can be reduced.

5) Because the cutting head is coaxial with the reaming head, the drill rod can play centering and guiding roles in the reaming (or spot facing) process, the reaming (or spot facing) can be prevented from deflecting, and the processing precision is improved.

6) In a similar way, due to the fact that the second chip removal groove is formed in the outer cylindrical surface of the reaming head, smooth chip removal can be achieved in the reaming or reaming process.

7) Because the bottom surface of the reaming head adopts the inverted cone-shaped structure with a big top and a small bottom, the cutting load can be effectively reduced, the reaming head can be prevented from being worn and heated, and the service life of the cutter is prolonged; but also can avoid the stress concentration of the counter bore.

The utility model can be used for drilling, reaming and countersinking; is a multi-purpose stone processing cutter.

Drawings

Fig. 1 is a schematic structural diagram of the present invention;

FIG. 2 is a left side view of FIG. 1;

fig. 3 is a sectional view a-a in fig. 1.

In the figure: the drill comprises a drill handle 1, a water injection hole 2, a second chip groove 3, a base body 4, a drill rod 5, a first carborundum cutting layer 6, a chip groove 7 and a second carborundum cutting layer 8.

Detailed Description

The invention will be further described with reference to the following drawings and specific examples:

as shown in fig. 1 to 3, the body is composed of a drill shank 1, a drill rod 5, and a cutting head composed of a first diamond dust cutting layer 6 fixedly coated on the front end of the drill rod 5 (including the end surface of the drill rod and the outer cylindrical surface close to the end surface) by brazing, and the core of the body has water injection holes 2 penetrating through the two end surfaces of the body in the axial direction. And a chip groove 7 arranged along the bus direction is arranged on the outer cylindrical surface of the cutting head, the lower end of the chip groove extends downwards to the end surface of the cutting head and is communicated with the water injection hole 2, and the upper end of the chip groove extends upwards to the outer cylindrical surface of the drill rod 5. The body is provided with a reaming head, the reaming head is composed of a cylindrical base body 4 fixedly connected with a drill shank 1 and a drill rod 5, and a second carborundum cutting layer 8 for cladding the outer cylindrical surface and the bottom surface of the base body in a brazing mode, and the diameter of the reaming head is larger than that of the cutting head.

In order to facilitate chip removal, a second chip removal groove 3 arranged along the bus direction is formed in the outer cylindrical surface of the reaming head.

Because the reaming area is large, more stone chips are generated, the number of the second chip discharge grooves 3 can be two, and the two chip discharge grooves are uniformly distributed by taking the axis of the reaming head as the center.

In order to reduce the cutting load of the reaming head, reduce the abrasion and slow down the stress concentration at the bottom of the stone hole, the bottom surface of the reaming head adopts an inverted cone structure.

Claims

1. A multi-purpose compound drill bit for tapping stone comprises a body consisting of a drill handle (1), a drill rod (5) and a cutting head, wherein the cutting head consists of a first carborundum cutting layer (6) coated on the front end of the drill rod (5), and a core part of the body is provided with a water injection hole (2) penetrating through two end surfaces of the body along the axial direction; the method is characterized in that: a chip groove (7) arranged along the bus direction is arranged on the outer cylindrical surface of the cutting head, one end of the chip groove extends downwards to the end surface of the cutting head and is communicated with the water injection hole (2), and the other end of the chip groove extends upwards to the outer cylindrical surface of the drill rod (5); the body is provided with a reaming head, the reaming head consists of a cylindrical base body (4) fixedly connected with a drill handle (1) and a drill rod (5) and a second carborundum cutting layer (8) coating the outer cylindrical surface and the bottom surface of the base body, and the diameter of the reaming head is larger than that of the cutting head.

2. The multipurpose stone open-hole composite drill bit as claimed in claim 1, characterized in that: and a second chip groove (3) arranged along the bus direction is formed on the outer cylindrical surface of the reaming head.

3. The multipurpose stone open-hole composite drill bit as claimed in claim 2, characterized in that: the two second chip grooves (3) are uniformly distributed by taking the axis of the reaming head as the center.

4. The multipurpose stone open-hole composite drill bit as claimed in any one of claims 1 to 3, wherein: the bottom surface of the reaming head is of an inverted cone structure.