CN214944014U

CN214944014U - Polycrystalline diamond compact combining rock breaking, ploughing and scraping

Info

Publication number: CN214944014U
Application number: CN202120748904.8U
Authority: CN
Inventors: 黄莹祥; 何泽伟; 杨志宏; 林文彬; 何克华; 庄智智; 吴跃明; 柳时栋
Original assignee: Fujian Wanlong New Material Technology Co ltd
Current assignee: Fujian Wanlong New Material Technology Co ltd
Priority date: 2021-04-13
Filing date: 2021-04-13
Publication date: 2021-11-30
Anticipated expiration: 2031-04-13

Abstract

The utility model discloses a broken rock, plough, the polycrystalline diamond compact who scrapes and combine together, including polycrystalline diamond layer, polycrystalline diamond layer's top surface integrated into one piece ground is equipped with the convex ridge that is Y style of calligraphy and distributes. Specifically, the outer end face of the ridge extends to the edge position of the top face, dividing the top face into three shaving faces. The plough surfaces on two sides of the convex ridge are obliquely arranged relative to the scraping surface of the polycrystalline diamond layer, and the two plough surfaces finish the steps of drilling rock stratum and cracking rock mass in sequence when the rock breaking blade formed by intersecting the tops of the convex ridge works. The utility model has the advantages that: when the drill bit is used, the plough face has good stress protection and support for the rock breaking edge, the shock resistance of the rock breaking edge is improved, the drilling efficiency of the drill bit is improved, the inclined scraping face is favorable for scraping rocks after rock breaking, and the product has a good chip removal effect in the plough process.

Description

Polycrystalline diamond compact combining rock breaking, ploughing and scraping

Technical Field

The utility model relates to a superhard materials field indicates a polycrystalline diamond compact that broken rock, plough, scraping combined together particularly.

Background

Polycrystalline Diamond Compacts (PDC), hereinafter referred to as PDC), are formed by sintering a polycrystalline diamond layer (PCD-polycrystalline diamond), and a cemented carbide substrate (tungsten carbide-cobalt) at high temperature and high pressure. It has both the hardness and wear resistance of diamond and the strength and impact toughness of hard alloy, and is one excellent material for cutting tool and wear resisting tool.

At present, a plane PCD layer and a special-shaped PCD layer with a ball head shape and a cone head are generally adopted when a PDC cutting element for a drill bit of drilling equipment is used, but the working mode of the conventional plane PDC is scraping, the working mode of ridge type PDC is plowing, the working mode of the cone head PDC is extrusion rock breaking, the working modes of the products are all single modes, the underground working condition is more complex as the drilling depth is deepened, and higher requirements are put forward on the comprehensive performance of a drilling tool. Wherein can make PDC have broken rock, plough and scraping function simultaneously through the shape structure that changes polycrystalline diamond layer, break rock and plough with the plough layer of design earlier, scrape and the chip removal through the layer of scraping of design to the rock stratum after the breakage, its broken rock efficiency of effectual improvement of this mode, chip removal ability reduces and creeps into resistance and increase the service life of work position.

Disclosure of Invention

The utility model aims at overcoming the defects existing in the prior art and providing a polycrystalline diamond compact combining rock breaking, plowing and scraping.

The utility model adopts the following technical scheme:

the utility model provides a broken rock, plough, the polycrystalline diamond compact that scrapes and combine together, includes carbide base member and the polycrystalline diamond layer that forms through high temperature high pressure forging, above-mentioned polycrystalline diamond layer fixed connection is in the top surface of carbide base member. The top surface of polycrystalline diamond layer is equipped with the convex ridge that is Y style of calligraphy and distributes integratively, and the outer terminal surface of convex ridge extends to the marginal position department of top surface, divides into three shaving face with the top surface simultaneously. The scraping surface is an inclined surface which extends downwards from the inner area of the top surface to the edge, and is beneficial to scraping and discharging the residual rock after the rock mass is cracked. The left side surface and the right side surface of the convex ridge are both obliquely arranged plowing surfaces, and the two plowing surfaces are intersected at the top of the convex ridge to form a rock breaking blade. And the rock breaking blade finishes the steps of drilling rock stratum and cracking rock mass in sequence during working.

Further, the plowing surface comprises a first transition surface, a plowing surface main body and a second transition surface which are sequentially connected from top to bottom.

Further, the first transition surface is a circular arc convex surface with a diameter ranging from 0.5mm to 1.5mm, and the second transition surface is a circular arc concave surface with a diameter ranging from 0.3mm to 1.0 mm.

Specifically, a third transition surface is arranged between two adjacent plowing surfaces of different ridges, and a triangular plane is formed between the three third transition surfaces.

Further, the third transition surface is a circular concave surface having a diameter of 5.0 mm.

Further, the included angle between the two plowing surfaces of the same ridge ranges from 20 degrees to 70 degrees.

Further, the height of the ridge is equal to or greater than 0.50 mm.

Further, a fourth transition surface is arranged between the top surface and the side surface of the polycrystalline diamond layer.

Further, the fourth transition surface is a circular arc convex surface with a diameter ranging from 0.2mm to 0.6 mm.

From the above description of the present invention, the present invention has the following advantages:

one of them, the utility model discloses a set up broken rock sword, the plough face on polycrystalline diamond layer convex ridge and the scraping face that sets up to the edge downwardly extending through the interior region of polycrystalline diamond layer top surface. When the drill bit is used, the rock breaking blade cuts, breaks and plows rock bodies and stratums in the drilling and tunneling processes, the excellent bursting performance is achieved, and the drilling efficiency of the drill bit is improved. The two sides of the bottom of the three rock breaking blades are obliquely arranged plowing surfaces, so that the rock breaking blades are well stressed and protected and supported, and the impact resistance of the rock breaking blades is improved. The scraping surface has a certain gradient, which is beneficial to scraping rocks after rock breaking and ensures that the product has good chip removal effect in the ploughing process.

And secondly, the transition surface is arranged on the internal structure of the polycrystalline diamond compact, so that the friction force generated between the rock breaking blade and the rock when the drill bit breaks the rock mass is reduced, the drilling resistance is reduced, and the efficiency of the drill bit of the serrated drilling equipment in the process of ploughing is improved.

Drawings

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

Fig. 2 is a top view of the present invention.

Detailed Description

The present invention will be further explained with reference to the accompanying drawings.

As shown in fig. 1 and 2, a polycrystalline diamond compact combining rock breaking, plowing and scraping mainly comprises a polycrystalline diamond layer 100 and a hard alloy substrate 200. The polycrystalline diamond compact has the hardness and wear resistance of diamond and the strength and impact toughness of hard alloy, and is widely applied to the operation of a drill bit of drilling equipment for cutting broken stones. The top surface of the polycrystalline diamond layer 100 is integrally formed by three ridges 120 distributed in a Y-shape, and the outer end surfaces 125 of the ridges extend to the edge of the top surface of the polycrystalline diamond layer 100.

As shown in fig. 1 and 2, the ridges 120 divide the top surface of the polycrystalline diamond layer 100 into three scraping surfaces 111 extending downward from the inner island region to the edge, the scraping surfaces 121 are formed by obliquely disposing the left and right side surfaces of the ridges 120, and each of the scraping surfaces 121 includes, from top to bottom, a first transition surface 122, a main body 123 of the scraping surface, and a second transition surface 124 which are sequentially connected. The two plowing surfaces 121 intersect at the top of the ridge 120 to form a rock breaking edge 130, a third transition surface 140 is arranged between two adjacent plowing surfaces 121 of different ridges 120, and a triangular plane 141 is formed between the three third transition surfaces 140. In addition, the polycrystalline diamond layer 100 is provided with a fourth transition surface 110 between the top surface and the side surface, which reduces the frictional force generated between the fractured layer and the rock when the rock mass is fractured.

Example 1:

as shown in fig. 1 and 2, in the present embodiment, a structure of a polycrystalline diamond compact that combines rock breaking, plowing, and scraping as shown in fig. 1 is integrally formed, and the polycrystalline diamond compact is fixedly connected to the top surface of the cemented carbide substrate. The diameter is 15.88mm and the total height is 13.20 mm. The manufacturing process of the polycrystalline diamond layer adopts synthesis combined with laser processing or other energy processing processes. The height of the scraping surface is 0.50mm, the height of the convex ridge is 1.50mm, a first transition surface between the rock breaking edge and the plowing surface is an arc convex surface with the diameter of 1.00mm, and a second transition surface between the scraping surface and the plowing surface is an arc concave surface with the diameter of 0.50 mm. The third transition surface is a circular arc concave surface with the diameter of 5.00 mm. The included angle between the two plowing surfaces of the same ridge is 50 degrees, and the fourth transition surface of the polycrystalline diamond layer is an arc convex surface with the diameter of 0.40 mm.

The polycrystalline diamond compact and a planar polycrystalline diamond compact with the same size are subjected to laboratory tests. Test results show that the cutting resistance of the polycrystalline diamond compact is far smaller than that of a comparison sample, and the rock breaking efficiency is higher.

To sum up, the utility model discloses have excellent ability of bursting, improved the drilling efficiency of drill bit. The two sides of the bottom of each rock breaking blade are obliquely arranged plowing surfaces, so that the rock breaking blades are well protected and supported under stress, and the impact resistance of the rock breaking blades is improved. The scraping surface has a certain gradient, which is beneficial to scraping rocks after rock breaking and ensures that the product has good chip removal effect in the ploughing process.

The above-mentioned be the utility model discloses a concrete implementation way, nevertheless the utility model discloses a design concept is not limited to this, and the ordinary use of this design is right the utility model discloses carry out immaterial change, all should belong to the act of infringement the protection scope of the utility model.

Claims

1. The utility model provides a broken rock, plough, scrape polycrystalline diamond compact that combines together, is applied to the sawtooth shape and bores the drill bit of wearing equipment, includes polycrystalline diamond layer, its characterized in that: the top surface of the polycrystalline diamond layer is integrally provided with three convex ridges distributed in a Y shape, the outer end surfaces of the convex ridges extend to the edge position of the top surface, and the top surface is divided into three scraping surfaces; the left side surface and the right side surface of the convex ridge are both obliquely arranged plowing surfaces, and the two plowing surfaces are intersected at the top of the convex ridge to form a rock breaking blade.

2. The rock breaking, plowing and scraping combined polycrystalline diamond compact of claim 1, wherein: the scraping surface is an inclined surface which extends downwards from the inner island area of the top surface to the edge.

3. The rock breaking, plowing and scraping combined polycrystalline diamond compact of claim 1, wherein: the plowing surface comprises a first transition surface, a plowing surface main body and a second transition surface which are sequentially connected from top to bottom.

4. The rock breaking, plowing and scraping combined polycrystalline diamond compact of claim 3, wherein: the first transition surface is an arc convex surface with the diameter range of 0.5mm to 1.5mm, and the second transition surface is an arc concave surface with the diameter range of 0.3mm to 1.0 mm.

5. The rock breaking, plowing and scraping combined polycrystalline diamond compact of claim 3, wherein: and a third transition surface is arranged between two adjacent plowing surfaces of different ridges, and a triangular plane is formed between the third transition surfaces.

6. The rock breaking, plowing and scraping combined polycrystalline diamond compact of claim 5, wherein: the third transition surface is a circular arc concave surface with the diameter of 5.0 mm.

7. The rock breaking, plowing and scraping combined polycrystalline diamond compact of claim 1, wherein: the height of the ridge is equal to or greater than 0.50 mm.

8. The rock breaking, plowing and scraping combined polycrystalline diamond compact of claim 1, wherein: and a fourth transition surface is arranged between the top surface and the side surface of the polycrystalline diamond layer.

9. The rock breaking, plowing and scraping combined polycrystalline diamond compact of claim 1, wherein: the fourth transition surface is a circular arc convex surface with the diameter range of 0.2mm to 0.6 mm.

10. A rock breaking, plowing and scraping combined polycrystalline diamond compact according to any one of claims 1 to 9, wherein: still include the carbide base member, polycrystalline diamond layer fixed connection is in the top surface of carbide base member.