CN218644224U

CN218644224U - Polycrystalline diamond compact bit

Info

Publication number: CN218644224U
Application number: CN202222922133.7U
Authority: CN
Inventors: 刘碧湘; 来聘华
Original assignee: Changsha Changtan Huacheng Drilling Machinery Co ltd
Current assignee: Changsha Changtan Huacheng Drilling Machinery Co ltd
Priority date: 2022-11-03
Filing date: 2022-11-03
Publication date: 2023-03-17
Anticipated expiration: 2032-11-03

Abstract

The utility model discloses a polycrystalline diamond compact bit, which comprises a bit matrix, wherein an assembly part is formed at the bottom of the bit matrix, and a bit assembly is arranged at the top of the bit matrix; the cutter head assembly comprises an annular cutter holder, a plurality of annular fan-shaped cutter assembling parts are formed on the annular surface of the top of the annular cutter holder, a first cutter head and a second cutter head are assembled on the cutter assembling parts, and the first cutter head and the second cutter head are both polycrystalline diamond compacts; the first cutter head wraps the top surface and the top of the outer side surface of the assembling part from the outer side; the second tool bit is formed on the outer side surface of the assembling part, and the outer surface of the second tool bit is a drilling section; a clearance groove is formed between the bottom of the outer side face of the first cutter head and the top face of the second cutter head, the clearance groove is a chute, and two ends of the clearance groove are respectively connected with the lower portion and the upper portion of the corresponding notch groove on two sides of the assembly portion. The utility model is suitable for a dry-type drilling operation, its drilling effect, chip removal performance and the cooling performance that has the preferred.

Description

Diamond polycrystalline compact drill bit

Technical Field

The utility model relates to a diamond bit technical field, concretely relates to compound piece drill bit of diamond polycrystal.

Background

The drill bit is used as a drilling tool and can be used for secondary processing operation of drilling block materials or plate materials, and the drill bit is mainly divided into a drag bit, a roller bit, a diamond bit and a special-purpose drill bit. In recent years, diamond drill bits are widely used in the process of processing and drilling materials, and the diamond drill bits mainly realize material cutting and drilling operations through contact between cutting teeth and the materials and extrusion and shearing on the surfaces of the materials under a rotating condition.

Generally, a conventional diamond drill bit is formed by forming a cutting head from diamond micro powder and specially formulated powder through a powder metallurgy process, and then integrally connecting the cutting head and a steel matrix through laser or high-frequency welding. In the operation process of the diamond drill bit, the drilling environment including materials has the greatest influence on the performance, effect and service life of the drill bit, and secondly, the structure and shape of a bit of the drill bit are the same, in order to enable the drill bit to have good adaptability with the materials, the drilling operation is usually carried out by matching with cooling liquid (usually water), the cooling liquid is utilized to assist chip removal and cooling, but only dry drilling operation can be carried out on the materials which can react or are not easy to clean after being polluted when meeting water, but no cooling medium is added in the dry drilling process, the chip removal and cooling capacity of the drill bit is very important under the dry drilling condition without the cooling liquid, if heat generated in the drilling and cutting process cannot be timely dissipated, the chips in the drilling process cannot be timely discharged, the whole bit is graphitized under the high-temperature condition, the bit is blackened, the strength of the bit is reduced, the service life is shortened, and the drilling bit needs to be stopped and replaced when serious, so that the operation efficiency is influenced.

SUMMERY OF THE UTILITY MODEL

The utility model provides a technical problem provide a compound piece drill bit of diamond polycrystal, can be used to solve the defect in the above-mentioned technical background.

The utility model provides a technical problem adopt following technical scheme to realize:

a polycrystalline diamond compact bit comprises a bit substrate, wherein the bit substrate is a steel substrate, an assembly part is formed at the bottom of the bit substrate, and the bit substrate is assembled and connected with a power unit through the assembly part; the top of the drill bit base body is provided with a cutter head component;

the cutter head assembly comprises an annular cutter holder, the bottom of the annular cutter holder and a drill bit base body are integrally formed, a plurality of annular fan-shaped cutter assembling parts are formed on the annular surface of the top of the annular cutter holder, gap grooves are formed between adjacent cutter assembling parts, a first cutter head and a second cutter head are assembled on the cutter assembling parts, and the first cutter head and the second cutter head are both polycrystalline diamond compacts; the first cutter head wraps the top surface and the top of the outer side surface of the assembling part from the outer side, and the top surface and the side surface of the first cutter head are used as drilling cutting surfaces; the second tool bit is formed on the outer side surface of the assembling part, and the outer surface of the second tool bit is a drilling section; a clearance groove is formed between the bottom of the outer side face of the first cutter head and the top face of the second cutter head, the clearance groove is a chute, and two ends of the clearance groove are respectively connected with the lower portion and the upper portion of the corresponding notch groove on two sides of the assembly portion.

As a further limitation, the annular tool apron and the drill bit base body are made of No. 45 steel which is made of the same material in an integral forming mode.

By way of further limitation, the lower end face of the annular tool holder is a mounting face, and the annular tool holder is fixed on the drill bit base body at the position of the mounting face.

As a further limitation, the cutter mounting part is formed with blind grooves as cutter mounting grooves at positions corresponding to the first cutter head and the second cutter head; and the tool bit assembly groove for assembling the first tool bit is a bevel groove, and the tool bit assembly groove for assembling the second tool bit is a counter bore groove.

As a further limitation, the first cutting head is formed with a plurality of parallel arranged cutting edges on the top surface, the cutting edges being beveled edges.

By way of further limitation, convex cutting edges are formed on the side surface of the first cutter head and the outer surface of the second cutter head, and the edge surface of each cutting edge extends parallel to the extending direction of the clearance groove.

Has the advantages that: the utility model relates to a compound piece drill bit of diamond polycrystal both can be used to take the wet-type of coolant liquid to creep into the operation, also can be used to do not have the dry-type of coolant liquid to creep into the operation, it drills the tangent plane through the lateral wall upper portion and the lower part that utilize first tool bit respectively and the top surface shaping of second tool bit, the brill tangent plane of the top surface of cooperation first tool bit carries out the multiaspect and bores and cut, can guarantee that the drill bit can cut into fast and be bored and cut the material, improve and bore and cut speed, can alleviate the defect that the brill tangent plane was concentrated on the traditional tool bit simultaneously, make and bore the heat dispersion of cutting the in-process production, cooperate through the breach groove between clearance groove between first tool bit side and the second tool bit and the assembly part simultaneously, the heat dispersion of the chip removal that has the preferred.

Drawings

Fig. 1 is a schematic structural diagram in a preferred embodiment of the present invention.

Fig. 2 is a schematic sectional view of the tool mounting portion of fig. 1.

Wherein: 1. a top surface cutting edge; 2. a notch groove; 3. a first cutter head; 4. a first side cutting edge; 5. a second cutter head; 6. a clearance groove; 7. a second side cutting edge; 8. a cutter mounting portion; 9. a drill bit substrate; 10. a threaded mounting portion.

Detailed Description

In order to make the technical means, creation characteristics, achievement purpose and efficacy of the utility model easy to understand and understand, the utility model is further explained by combining with the specific figure below.

Referring to fig. 1 and 2, in the embodiment, the body of the polycrystalline diamond compact drill bit comprises a drill bit base body 9 and a cutter head assembly, wherein the drill bit base body 9 is formed by 45 # steel, a threaded assembling portion 10 is formed on the lower portion of the drill bit base body 9, and the threaded assembling portion 10 is assembled and connected with a power unit as an assembling structure and is driven by the power unit to rotate so as to realize drilling operation.

The cutter head component is formed on the top of the drill bit base body 9, the main body of the cutter head component is an annular cutter holder 8, the annular cutter holder 8 is of an annular structure matched with the top surface of the drill bit base body 9 in size, and the annular cutter holder 8 is formed by No. 45 steel made of the same material as the drill bit base body 9. In the present embodiment, the annular tool apron 8 is integrally formed with the drill base 9 during the forming process, so as to have better integrity to improve the structural stability during the operation thereof, while in another embodiment, the annular tool apron 8 may also be an assembly structure, and the top surface of the drill base 9 is assembled and connected by screwing, inserting, pin connecting and the like, so that under the condition of this way, the drill has better replaceable performance, so as to effectively reduce the use cost by replacing the tool bit assembly.

The top surface of the annular tool apron 8 is formed with a plurality of annular fan-shaped tool assembling parts, a gap groove 2 is formed between the adjacent tool assembling parts, the structure of each tool assembling part on the annular tool apron 8 is shown in fig. 2, the annular tool apron 8 is formed with a bevel groove on the top surface corresponding to the tool assembling parts, a counter bore groove is formed on the lower part of the bevel groove corresponding to the side surface, the tool assembling parts are provided with first tool bits 3 in the bevel groove positions in the patterns shown in the figures, the counter bore groove positions are provided with second tool bits 5 in the patterns shown in the figures, and the corresponding forming mode can be a common laser or high-frequency welding mode in the prior art.

The first tool bit 3 is an L-shaped polycrystalline diamond compact, and after the bevel groove position and the annular tool apron 8 are assembled into a whole, a plurality of top surface cutting edges 1 which are arranged in parallel are formed on the top surface corresponding to the first tool bit 3, and the cutting edges of the top surface cutting edges 1 are inclined surface edges; and the corresponding vertical surface (namely, the side surface) of the first cutting head 3 is formed with a convex first side surface cutting edge 4, and the top surface and the side surface of the first cutting head 3 are used as drilling surfaces. The second tool bit 5 is a straight-sheet polycrystalline diamond compact, a second side cutting edge 7 is formed on the outer surface of the second tool bit, and the outer surface of the second tool bit 5 is a drilling section.

Meanwhile, the lower surface of the side surface of the first cutter head 3 is provided with a bevel edge, the upper surface of the second cutter head 5 is provided with a bevel edge, after the second cutter head 5 and the first cutter head 3 are assembled into a whole by the annular cutter holder 8, the bevel edge of the upper surface of the second cutter head 5 is parallel to the bevel edge formed on the lower surface of the side surface of the first cutter head 3, a clearance space is reserved between the two parallel bevel edges to be used as a clearance groove 6, correspondingly, the clearance groove 6 is a straight groove, and two ends of the clearance groove are respectively connected with the lower part and the upper part of the notch groove on two sides of the corresponding assembly part. While the first side cutting edge 4 and the second side cutting edge 7 are likewise parallel to the bevel and the clearance groove 6.

In the present embodiment, the chips of material cut by the top surface cutting edge 1 are discharged through the cutaway groove 2, while the first side surface cutting edge 4 on the first cutter head 3 and the second side surface cutting edge 7 on the second cutter head 5 also have cutting performance, and the chips of material produced by cutting thereof are discharged from the cutaway groove 2 along the clearance groove 6; the convex structures of the first side surface cutting edge 4 and the second side surface cutting edge 7 can effectively reduce the contact area of the side surface of the cutter head and a drilled material, and reduce the drilling resistance, and the multi-surface drilling structure can effectively alleviate the defect that the drilling surface of the traditional cutter head is concentrated, thereby being beneficial to the heat dissipation of the cutter head.

The foregoing shows and describes the basic principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Furthermore, it should be understood that various changes, modifications and/or alterations to the present invention may be made by those skilled in the art after reading the technical disclosure of the present invention, and all such equivalents may fall within the scope of the present invention as defined by the appended claims.

Claims

1. A polycrystalline diamond compact bit comprises a bit substrate and is characterized in that the bit substrate is a steel substrate, an assembling part is formed at the bottom of the bit substrate, and the bit substrate is assembled and connected with a power unit through the assembling part; the top of the drill bit base body is provided with a cutter head component;

the tool bit assembly comprises an annular tool holder, the bottom of the annular tool holder and a drill bit base body are integrally formed, a plurality of annular fan-shaped tool assembling parts are formed on the annular surface of the top of the annular tool holder, a gap groove is formed between every two adjacent tool assembling parts, a first tool bit and a second tool bit are assembled on the tool assembling parts, and the first tool bit and the second tool bit are both diamond polycrystalline composite sheets; the first cutter head wraps the top surface and the top of the outer side surface of the assembling part from the outer side, and the top surface and the side surface of the first cutter head are used as drilling cutting surfaces; the second tool bit is formed on the outer side surface of the assembling part, and the outer surface of the second tool bit is a drilling section; a clearance groove is formed between the bottom of the outer side face of the first cutter head and the top face of the second cutter head, the clearance groove is a chute, and two ends of the clearance groove are respectively connected with the lower portion and the upper portion of the corresponding notch groove on two sides of the assembly portion.

2. The polycrystalline diamond compact bit according to claim 1, wherein the annular tool apron and the bit substrate are made of No. 45 steel which is the same material.

3. The polycrystalline diamond compact bit according to claim 1, wherein the lower end surface of the annular tool holder is a mounting surface, and the annular tool holder is fixed on the bit base body at the position of the mounting surface.

4. The polycrystalline diamond compact bit according to claim 1, wherein the cutter mounting portion is formed with blind grooves as cutter mounting grooves at positions corresponding to the first cutter head and the second cutter head; and the tool bit assembly groove for assembling the first tool bit is a bevel groove, and the tool bit assembly groove for assembling the second tool bit is a counter bore groove.

5. A polycrystalline diamond compact bit according to claim 1, wherein the first segment has a plurality of parallel cutting edges formed on a top surface, the cutting edges being beveled edges.

6. The polycrystalline diamond compact bit of claim 1, wherein the side surface of the first segment and the outer surface of the second segment are each formed with a convex cutting edge, and the cutting edge has an edge surface that runs parallel to the running of the clearance groove.