CN2270113Y

CN2270113Y - Self-sharpening type diamond drilling bit for drilling machine

Info

Publication number: CN2270113Y
Application number: CN 96201292
Authority: CN
Inventors: 黄新农
Original assignee: Individual
Current assignee: Individual
Priority date: 1996-01-10
Filing date: 1996-01-10
Publication date: 1997-12-10
Anticipated expiration: 2006-01-10

Abstract

The utility model relates to a drilling mechanical engineering. An automatic sharpening type diamond drilling bit for a drilling machine forms a cylindrical shape. One end of a drilling bit body is a connecting screw thread, and the other end is a working layer of diamond and a water gap. The utility model is characterized in that the inner part of the working layer of the diamond is provided with more than one interval layer along the circumferential direction of the working layer; the interval layer is made of materials, wherein the hardness of the materials is slightly weaker than the hardness of the diamond, and the wear-resisting property of the materials is slightly poor. The utility model has the characteristics that the design is novel, the drilling bit still keeps a sharpening state after worn out in use, and the drilling efficiency is high.

Description

The self-sharpening diamond bit of rig

The utility model relates to the boring mechanic engineering, is a kind of self-sharpening diamond bit of adapted on the rig.

At present, the working lining of the drill bit of using on the rig all is that diamond is that main identical material constitutes, uses one section wearing and tearing in period after, the sharpness of boring reduces, the efficient reduction.

The purpose of this utility model provides a kind of self-sharpening diamond bit, and rig uses it, and it can still keep sharp state after wearing and tearing occurring.

The purpose of this utility model is to realize like this, the self-sharpening diamond bit of rig is the garden tubular, one end of bit body is for connecting rib-loop, the other end is the diamond working layers and the mouth of a river, it is characterized in that: in diamond working layers inside, garden Zhou Fangxiang along working lining, be provided with the above wall of one deck, at interval series of strata adopt than diamond hardness slightly a little less than, the poor slightly material of anti-wear performance is made, this drill bit in use, wall always is worn earlier, has for example adopted two-layer wall, will occur the sharp top of three circle diamonds after the wearing and tearing, this just makes drill bit keep sharp state.

Characteristics of the present utility model are: modern design after being worn during drill bit uses, still keeps sharp keen state, the drilling efficiency height.

Embodiment further describes below in conjunction with accompanying drawing: Fig. 1 is the surface structure schematic diagram of drill bit, and Fig. 2 is the bottom view of Fig. 1, and it shows the positional structure of wall, and Fig. 3, Fig. 4 are the structural representation of another kind of wall.

Embodiment: referring to Fig. 1, Fig. 2, this is a kind of embodiment of the present utility model, and the appearance and size of drill bit is all made by national standard, and the rib-loop 2 of connection is arranged on the bit body 1, under the diamond working layers 3 and the mouth of a river 4 are arranged, shown the position of wall 5 among Fig. 2, wall is made of metallic nickel materials, in the use, nickel dam is worn earlier, and drill bit presents the sharp top of two circle diamonds.With the Φ 100MM mouth of a river is that 8 drill bit is an example, contrasts as follows;

Common drill bit self-sharpening bit

Rotating speed (rev/min) 400 400

Drilling efficiency (millimeter/minute) 15-20 20-30

Bit life (rice) 25.49 32.74

By the process conditions difference, self-sharpening bit of the present utility model also can be made into Fig. 3, the structure of Fig. 4, the wall of Fig. 3 is that the little garden rod of non-diamond is distributed in the layer, Fig. 4 is distributed in the wall for the small rectangular block of non-diamond, and Fig. 3, Fig. 4 are the self-sharpening bit that is provided with two-layer wall.

Claims

The self-sharpening diamond bit of rig, be the garden tubular, one end of bit body 1 is for connecting rib-loop 2, the other end is the diamond working layers 3 and the mouth of a river 4, it is characterized in that: in diamond working layers inside, along the garden Zhou Fangxiang of working lining, be provided with the above wall 5 of one deck, interval series of strata employing is more weak slightly than diamond hardness, the poor slightly material of anti-wear performance is made.