CN219570027U

CN219570027U - Diamond composite cutting pick

Info

Publication number: CN219570027U
Application number: CN202320401898.8U
Authority: CN
Inventors: 王义文; 曹经钦
Original assignee: Wuhan Xinrui Alloy Tools Co ltd
Current assignee: Wuhan Xinrui Alloy Tools Co ltd
Priority date: 2023-03-06
Filing date: 2023-03-06
Publication date: 2023-08-22
Anticipated expiration: 2033-03-06

Abstract

The diamond composite cutting pick comprises a hard alloy substrate and a diamond layer, wherein the hard alloy substrate comprises a cylindrical part, a round table part and a spherical segment part, the cylindrical part, the round table part and the spherical segment part are integrally formed and are sequentially butted along the central axis direction of the hard alloy substrate, the diamond layer is combined on the surface of the round table and the surface of the spherical segment, a plurality of annular grooves and a plurality of trapezoid grooves are uniformly formed on the surface of the round table, the annular grooves are formed at intervals along the circumferential direction of the round table, the trapezoid grooves are formed at intervals along the generatrix direction of the round table, and the trapezoid grooves are large in groove bottom and small in opening shape when being observed from the cross section of the round table; square bulges which are uniformly distributed are arranged on the surface of the ball gap. The surface structure of the hard alloy substrate is improved to increase the bonding area with diamond, so that the bonding force between diamond and hard alloy is enhanced, namely, a plurality of square protrusions are arranged on the surface of the ball segment, a plurality of annular grooves and a plurality of trapezoid grooves are formed on the surface of the round table, the impact resistance and the wear resistance of the cutting pick are improved, and the service life of the cutting pick is prolonged.

Description

Diamond composite cutting pick

Technical Field

The utility model relates to the field of coal mines and mining equipment, in particular to a diamond composite cutting pick.

Background

Diamond composite picks are widely used as cutting teeth for petroleum and geological drill bits; the diamond composite cutting pick is characterized in that a high-temperature and high-pressure technology is adopted on a diamond synthesis press to compound diamond on the surface of the hard alloy matrix button, so that a diamond thin layer with good wear resistance is formed. Therefore, when in cutting, the diamond thin layer on the surface layer can resist abrasion of abrasive particles to a great extent, the hard alloy on the inner layer can resist impact of the abrasive particles well due to good toughness, and the service life of the cutting pick is greatly prolonged due to combination of the diamond thin layer on the surface layer and the hard alloy on the inner layer.

In the prior art, a diamond composite cutting pick (CN 203961977U) is disclosed, wherein radial or rectangular grooves and circumferential ring grooves which are uniformly distributed are arranged on the surface of a cone; the spherical surface is provided with the circumferential ring grooves and the radial grooves, so that the coverage area of the diamond layer on the surface of the spherical tooth is increased, the binding force of diamond and hard alloy is enhanced, but in long-term use, the diamond thin layer on the surface layer cannot reach the expected service life, and the diamond thin layer is worn and falls off.

Therefore, how to improve the structural shape of the cutting pick surface, and cover a larger area of diamond layer on the effective spherical tooth surface, so as to strengthen the bonding force of diamond and hard alloy, and become the subject to be studied and solved by the utility model.

Disclosure of Invention

The utility model aims to provide a diamond composite cutting pick.

In order to achieve the above purpose, the utility model adopts the following technical scheme: the diamond composite cutting pick comprises a hard alloy matrix and a diamond layer, wherein the hard alloy matrix comprises a cylindrical part, a round table part and a spherical segment part, the cylindrical part, the round table part and the spherical segment part are integrally formed and are sequentially butted along the central axis direction of the hard alloy matrix, and the diamond layer is combined on the surface of the round table and the surface of the spherical segment;

the surface of the round table is uniformly provided with a plurality of ring grooves and a plurality of grooves, the ring grooves are formed at intervals along the circumferential direction of the round table, the grooves are formed at intervals along the generatrix direction of the round table, and the grooves are trapezoid grooves with large groove bottoms and small openings when being observed from the cross section of the round table;

square protrusions which are uniformly distributed are arranged on the surface of the spherical segment.

In the scheme, the surface of the spherical segment is provided with the square bulges, and the surface of the round table is provided with the annular grooves and the trapezoidal grooves, so that the surface of the hard alloy substrate presents an effective concave-convex surface, on one hand, the coverage area of the diamond can be increased, and further, the binding force between the diamond and the hard alloy is enhanced; on the other hand, the concave-convex structure can resist the impact force of abrasive particles simultaneously from the circumference and the radial direction of the matrix, so that the falling of the diamond layer can be prevented to a certain extent, the impact resistance and the wear resistance of the cutting pick are finally improved, and the service life of the cutting pick is prolonged.

According to a further technical scheme, 21-30 square protrusions are arranged on the surface of the spherical segment, the length of each square protrusion is 0.3-0.5mm, the width of each square protrusion is 0.3-0.5mm, and the thickness of each square protrusion is 0.2-1.0mm.

According to a further technical scheme, 16-20 trapezoid grooves are uniformly formed in the surface of the round table, and the tops of two side faces of each trapezoid groove are in arc transition.

According to a further technical scheme, the trapezoid grooves comprise long trapezoid grooves and short trapezoid grooves which are alternately arranged, the long trapezoid grooves and the annular grooves are all arranged in a crossing mode, and the short trapezoid grooves and part of the annular grooves are arranged in a crossing mode.

According to a further technical scheme, the width of the groove bottom of the long trapezoid groove is 2-3mm, the depth of the groove bottom is 0.8-1mm, and an included angle of 15-20 degrees is formed between the groove bottom and two waists of the trapezoid; the width of the groove bottom of the short trapezoid groove is 1-1.5mm, the depth of the groove bottom is 0.8-1mm, and an included angle of 15-20 degrees is formed between the groove bottom and two waists of the trapezoid.

According to a further technical scheme, 3-5 ring grooves are formed in the surface of the round table, the width of each ring groove is 1.5-2mm, the interval between the ring grooves is 1-1.5mm, and the distance between one ring groove close to the spherical segment and the top end of the spherical segment is 3-4mm.

The utility model has the following advantages:

according to the scheme, the surface structure of the hard alloy substrate is improved, so that the surface presents a maximized concave-convex surface, namely, a plurality of square bulges are arranged on the surface of the spherical segment, a plurality of annular grooves and a plurality of trapezoid grooves are formed on the surface of the round table, on one hand, the bonding area of the hard alloy substrate and diamond can be increased, and then the bonding force between the diamond and the hard alloy is enhanced, on the other hand, the attack of abrasive particles can be resisted simultaneously from the radial direction and the circumferential direction in the cutting process, the diamond layer is prevented from falling off, the impact resistance and the wear resistance of a cutting pick are improved, and the service life of the cutting pick is prolonged.

Drawings

FIG. 1 is a schematic diagram of an embodiment of the present utility model;

FIG. 2 is a schematic cross-sectional view of a trapezoidal recess according to an embodiment of the present utility model.

In the above figures: 1. a cemented carbide substrate; 2. a diamond layer; 3. the surface of the round table; 4. a segment surface; 5. a ring groove; 6. a trapezoidal groove; 7. square protrusions; 8. a long trapezoidal groove; 9. short trapezoid grooves.

Detailed Description

The utility model is further described below with reference to the accompanying drawings and examples:

examples: the present utility model will be described in detail with reference to the drawings, wherein modifications and variations are possible in light of the teachings of the present utility model, without departing from the spirit and scope of the present utility model, as will be apparent to those of skill in the art upon understanding the embodiments of the present utility model.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the present disclosure. Singular forms such as "a," "an," "the," and "the" are intended to include the plural forms as well, as used herein.

As used herein, the term "comprising" is intended to be inclusive and not limited to.

The term (terms) as used herein generally has the ordinary meaning of each term as used in this field, in this disclosure, and in the special context, unless otherwise noted. Certain terms used to describe the present disclosure are discussed below, or elsewhere in this specification, to provide additional guidance to those skilled in the art in connection with the description herein.

Referring to fig. 1-2, a diamond composite cutting pick comprises a cemented carbide substrate 1 and a diamond layer 2, wherein the cemented carbide substrate 1 comprises a cylindrical part, a round table part and a spherical segment part, the three parts are integrally formed and are sequentially abutted along the central axis direction of the cemented carbide substrate 1, the diamond layer 2 is combined on a round table surface 3 and a spherical segment surface 4, a plurality of annular grooves 5 and a plurality of grooves are uniformly formed in the round table surface 3, the annular grooves 5 are formed along the circumferential interval of the round table, the grooves are formed along the bus direction of the round table at intervals, and the grooves are trapezoid grooves 6 (see fig. 2) with large groove bottoms and small openings as viewed from the cross section of the round table. The number of the trapezoid grooves 6 is 16-20 according to the design of the surface area of the round table, and the tops of the two side surfaces of each trapezoid groove 6 are in arc transition; the number of the ring grooves 5 is 3-5, the width of each ring groove 5 is 1.5-2mm, the interval between the ring grooves 5 is 1-1.5mm, and the distance between one ring groove 5 close to the spherical segment and the top end of the spherical segment is 3-4mm.

Wherein, considering the perimeter difference between the upper bottom surface and the lower bottom surface of the circular truncated cone, and also considering the realization of the processing technology, the trapezoid groove 6 comprises a long trapezoid groove 8 and a short trapezoid groove 9 which are alternately arranged, wherein the groove width of the short trapezoid groove 9 is smaller than the groove width of the long trapezoid groove 8, and the length of the short trapezoid groove 9 is also smaller than the length of the long trapezoid groove 8. The long trapezoid grooves are arranged in a crossing manner with the ring grooves 5, the short trapezoid grooves 9 are arranged in a crossing manner with part of the ring grooves 5, and the short trapezoid grooves 9 can only be arranged in a crossing manner with the ring grooves 5 far away from the ball gap due to the circumference difference between the upper bottom surface and the lower bottom surface of the round table. The width of the groove bottom of the long trapezoid groove 8 is 2-3mm, the depth is 0.8-1mm, and the included angle between the groove bottom and two waists of the trapezoid is 15-20 degrees; the width of the groove bottom of the short trapezoid groove 9 is 1-1.5mm, the depth is 0.8-1mm, and the included angle between the groove bottom and the two waists of the trapezoid is 15-20 degrees.

The surface 4 of the sphere is provided with square bulges 7 which are uniformly distributed, 21-30 square bulges 7 are arranged according to the surface area of the sphere, the length of each square bulge 7 is 0.3-0.5mm, the width is 0.3-0.5mm, and the thickness is 0.2-1.0mm.

The above embodiments are provided to illustrate the technical concept and features of the present utility model and are intended to enable those skilled in the art to understand the content of the present utility model and implement the same, and are not intended to limit the scope of the present utility model. All equivalent changes or modifications made in accordance with the spirit of the present utility model should be construed to be included in the scope of the present utility model.

Claims

1. The utility model provides a diamond composite cutting pick, includes carbide base member (1) and diamond layer (2), carbide base member (1) include cylinder portion, round platform portion and sphere portion, and three integrated into one piece just dock in proper order along the central axis direction of carbide base member (1), diamond layer (2) combine in round platform surface (3) and sphere surface (4), its characterized in that:

the surface (3) of the round table is uniformly provided with a plurality of ring grooves (5) and a plurality of grooves, the ring grooves (5) are formed at intervals along the circumferential direction of the round table, the grooves are formed at intervals along the direction of a generatrix of the round table, and the grooves are trapezoid grooves (6) with large groove bottoms and small openings as seen from the cross section of the round table;

the surface (4) of the sphere is provided with square bulges (7) which are uniformly distributed.

2. A diamond composite pick according to claim 1, wherein: 21-30 square protrusions (7) are arranged on the surface (4) of the spherical segment, the length of each square protrusion (7) is 0.3-0.5mm, the width is 0.3-0.5mm, and the thickness is 0.2-1.0mm.

3. A diamond composite pick according to claim 1, wherein: 16-20 trapezoid grooves (6) are uniformly formed in the surface (3) of the round table, and the tops of two side surfaces of each trapezoid groove (6) are in arc transition.

4. A diamond composite pick according to claim 3, wherein: the trapezoid grooves (6) comprise long trapezoid grooves (8) and short trapezoid grooves (9) which are alternately arranged, the long trapezoid grooves (8) and the annular grooves (5) are all arranged in a crossed mode, and the short trapezoid grooves (9) and part of the annular grooves (5) are arranged in a crossed mode.

5. A diamond composite pick according to claim 4, wherein: the width of the groove bottom of the long trapezoid groove (8) is 2-3mm, the depth is 0.8-1mm, and an included angle of 15-20 degrees is formed between the groove bottom and two waists of the trapezoid;

the width of the groove bottom of the short trapezoid groove (9) is 1-1.5mm, the depth is 0.8-1mm, and the included angle between the groove bottom and the two waists of the trapezoid is 15-20 degrees.

6. A diamond composite pick according to claim 1, wherein: 3-5 ring grooves (5) are formed in the surface (3) of the round table, the width of each ring groove (5) is 1.5-2mm, the interval between the ring grooves (5) is 1-1.5mm, and the distance between one ring groove (5) close to the spherical segment and the top end of the spherical segment is 3-4mm.