CN213710973U

CN213710973U - Special-shaped diamond compact with two prismatic teeth

Info

Publication number: CN213710973U
Application number: CN202022468603.8U
Authority: CN
Inventors: 陈本富; 朱伟
Original assignee: Chongqing Beisika New Material Co ltd
Current assignee: Chongqing Beisika New Material Co ltd
Priority date: 2020-10-30
Filing date: 2020-10-30
Publication date: 2021-07-16
Anticipated expiration: 2030-10-30

Abstract

The utility model relates to a two arris tooth diamond compact pieces of dysmorphism, including carbide basement and polycrystalline diamond layer, the carbide basement is cylindrical, and its upper end sinters there is polycrystalline diamond layer, its characterized in that: a top plane is arranged in the middle of the upper surface of the polycrystalline diamond layer, an upwardly convex ellipsoidal curved surface is arranged in the top plane, side planes are respectively arranged on two sides of the top plane, and the two side planes are symmetrically arranged along the long axis of the horizontal section of the ellipsoidal curved surface; the side plane is smoothly connected with the top plane through an inner cylindrical surface, and the intersection line of the inner cylindrical surface and the side plane forms a linear cutting edge; the intersection line of side plane and outer face of cylinder constitutes first curve cutting edge, the utility model discloses simple structure, reasonable in design, sintered carbide basement and polycrystalline diamond layer combine firmly under the high temperature high pressure, have improved shock resistance, and polycrystalline diamond layer has a plurality of cutting edges and cutting face simultaneously, has better shock resistance and chip removal performance, has improved and has crept into efficiency.

Description

Special-shaped diamond compact with two prismatic teeth

Technical Field

The utility model relates to a two arris tooth diamond compact pieces of dysmorphism belongs to diamond compact piece technical field.

Background

The diamond compact consists of two parts, namely a diamond layer and a hard alloy substrate. The diamond powder is prepared by sintering fine diamond powder and a hard alloy matrix under the conditions of ultrahigh pressure and high temperature (5-7 ten thousand atmospheric pressure, 1400 ℃ C. and 1600 ℃ C.). The diamond composite sheet is mainly suitable for diamond composite sheet drill bits (PDC drill bits) which are used for drilling soft to medium-hardness and complex geological layers and is mainly used for petroleum and natural gas exploitation. The diamond grains in the polycrystalline diamond layer have complete D-D bond combination microscopic characteristics, so that the diamond layer has high strength, high hardness and high wear resistance, and simultaneously has good self-sharpening performance, and a new cutting surface can be continuously exposed in the drilling and grinding process, so that the effective cutting effect on rocks is kept. The structure of the existing diamond compact is not optimized enough, the cutting effect is not ideal enough, and meanwhile, the connection of a diamond compact drill bit is not firm enough.

SUMMERY OF THE UTILITY MODEL

To the above problem, the to-be-solved technical problem of the utility model is to provide a two arris tooth diamond compact pieces of dysmorphism have a plurality of cutting edges and cutting plane, and intensity is high, and the wearability is good, and cutting performance is good.

The utility model discloses a two arris tooth diamond compact pieces of dysmorphism, including carbide basement and polycrystalline diamond layer, the carbide basement is cylindrical, and its upper end sinters there is polycrystalline diamond layer, its characterized in that: a top plane is arranged in the middle of the upper surface of the polycrystalline diamond layer, an upwardly convex ellipsoidal curved surface is arranged in the top plane, side planes higher than the top plane are respectively arranged on two sides of the top plane, and the two side planes are symmetrically arranged along the long axis of the horizontal section of the ellipsoidal curved surface; the side plane and the top plane are smoothly connected through an inner cylindrical surface, and the intersection line of the inner cylindrical surface and the side plane forms a linear cutting edge; the intersection line of the side plane and the outer cylindrical surface of the polycrystalline diamond layer forms a first curved cutting edge, and the intersection line of the inner cylindrical surface and the outer cylindrical surface of the polycrystalline diamond layer is a second curved cutting edge; the side plane and the inner cylindrical surface, the side plane and the outer cylindrical surface, and the inner cylindrical surface and the outer cylindrical surface are all connected smoothly.

Further, the side plane is parallel to the top plane and is higher than the top end of the ellipsoidal curved surface.

Furthermore, the surfaces of the straight cutting edge, the first curved cutting edge and the second curved cutting edge are arc-shaped, and the curvature radius of the straight cutting edge, the first curved cutting edge and the second curved cutting edge is 0.27-0.33 mm.

The utility model has the advantages that: simple structure, reasonable in design, the sintered carbide basement and polycrystalline diamond layer combine more firmly under the high temperature high pressure, have improved diamond compact's impact strength, and polycrystalline diamond layer has a plurality of cutting edges and cutting face simultaneously, has better shock resistance and chip removal performance, has improved and has crept into efficiency.

Drawings

Fig. 1 is a schematic perspective view of a preferred embodiment of the present invention.

Fig. 2 is a schematic front view of the preferred embodiment of the present invention.

Fig. 3 is a schematic top view of the preferred embodiment of the present invention.

Detailed Description

The present invention will be described in further detail with reference to the following embodiments and accompanying drawings.

The utility model provides a two arris tooth diamond compacts of dysmorphism as shown in fig. 1 to 3, includes carbide substrate and polycrystalline diamond layer, the carbide substrate is cylindrical, and its upper end has sintered polycrystalline diamond layer, its characterized in that: a top plane 101 is arranged in the middle of the upper surface of the polycrystalline diamond layer 1, an upward convex ellipsoidal curved surface 102 is arranged in the top plane 101, side planes 103 higher than the top plane 101 are respectively arranged on two sides of the top plane 101, and the two side planes 103 are symmetrically arranged along the long axis of the horizontal section of the ellipsoidal curved surface; the side plane 103 and the top plane 101 are smoothly connected through an inner cylindrical surface 104, and the intersection line of the inner cylindrical surface 104 and the side plane 103 forms a linear cutting edge 106; the intersection line of the side plane 103 and the outer cylindrical surface 105 of the polycrystalline diamond layer 1 forms a first curved cutting edge 107, and the intersection line of the inner cylindrical surface 104 and the outer cylindrical surface 105 of the polycrystalline diamond layer 1 is a second curved cutting edge 108; the side plane 103 and the inner cylindrical surface 104, the side plane 103 and the outer cylindrical surface 105, and the inner cylindrical surface 104 and the outer cylindrical surface 105 are all connected smoothly.

Further, the side plane 103 is parallel to the top plane 101 and is higher than the top end of the ellipsoidal curved surface 102.

Further, the surfaces of the straight cutting edge 106, the first curved cutting edge 107 and the second curved cutting edge 108 are all arc-shaped, and the curvature radius is 0.3 mm.

The utility model discloses a diamond compact, when using, diamond compact cutting gets into the rock layer, and lateral plane 103, sharp cutting edge 106 and first curve cutting edge 107 on the polycrystalline diamond layer 1 at first contact with the stratum rock participate in the cutting, and the inner cylinder surface 104 of side plays good drainage chip removal effect, further improves and creeps into efficiency. With the increase of the drilling depth, the inner cylindrical surface 104, the second curved cutting edge 108 and the polycrystalline diamond side cylindrical surface 103 contact the rock stratum, participate in the cutting process, and in the abrasion process of the two cutting planes, new surfaces continue to participate in the cutting, so that the drilling efficiency is improved. Many cutting edges and a plurality of cutting face participate in the cutting simultaneously, and structural axial symmetry has improved the intensity of diamond compact piece, avoids the inefficacy that arouses because of stress concentration in the cutting process, increase of service life.

The technical solutions provided by the embodiments of the present invention are described in detail above, and the principles and embodiments of the present invention are explained herein by using specific examples, and the descriptions of the above embodiments are only applicable to help understand the principles of the embodiments of the present invention; meanwhile, for a person skilled in the art, according to the embodiments of the present invention, there may be variations in the specific implementation manners and application ranges, and in summary, the content of the description should not be construed as a limitation to the present invention.

Claims

1. The utility model provides a two arris tooth diamond compact pieces of dysmorphism, includes carbide substrate (2) and polycrystalline diamond layer (1), carbide substrate (2) are cylindrical, and its upper end is sintered there is polycrystalline diamond layer (1), its characterized in that: a top plane (101) is arranged in the middle of the upper surface of the polycrystalline diamond layer (1), an upward convex ellipsoidal curved surface (102) is arranged in the top plane (101), side planes (103) higher than the top plane (101) are respectively arranged on two sides of the top plane (101), and the two side planes (103) are symmetrically arranged along the long axis of the horizontal section of the ellipsoidal curved surface; the side plane (103) and the top plane (101) are smoothly connected through an inner cylindrical surface (104), and the intersection line of the inner cylindrical surface (104) and the side plane (103) forms a linear cutting edge (106); the intersection line of the side plane (103) and the outer cylindrical surface (105) of the polycrystalline diamond layer (1) forms a first curved cutting edge (107), and the intersection line of the inner cylindrical surface (104) and the outer cylindrical surface (105) of the polycrystalline diamond layer (1) is a second curved cutting edge (108); the side plane (103) is connected with the inner cylindrical surface (104), the side plane (103) is connected with the outer cylindrical surface (105), and the inner cylindrical surface (104) is connected with the outer cylindrical surface (105) in a smooth manner.

2. The profiled bicuspid diamond compact according to claim 1, wherein: the side plane (103) is parallel to the top plane (101) and is higher than the top end of the ellipsoidal curved surface (102).

3. The profiled bicuspid diamond compact according to claim 1, wherein: the surfaces of the linear cutting edge (106), the first curve cutting edge (107) and the second curve cutting edge (108) are all arc-shaped, and the curvature radius of the arc-shaped cutting edge is 0.27-0.33 mm.