Impact-resistant pick-shaped diamond composite teeth
A diamond and composite tooth technology, applied in construction and other directions, can solve the problems of difficult processing technology, complex structure, and high production cost of drill bits, and achieve the effects of simplifying structure and processing technology, improving work reliability, and reducing processing costs.
Active Publication Date: 2015-11-04
桂林星钻超硬材料有限公司
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Problems solved by technology
However, the drill tooth with this structure not only has complex structure and difficult processing technology, but also has high production cost of the drill bit; it is not easy to install and fix the polycrystalline diamond composite teeth, and the working reliability of the drill bit is low and insufficient.
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[0023] An impact-resistant pick-shaped diamond composite tooth, such as Figure 1~3 As shown, it is mainly composed of polycrystalline diamond sheet and cylindrical cemented carbide matrix. The lower surface of the polycrystalline diamond sheet is compositely connected with the upper surface of the cemented carbide substrate. in:
[0024] The upper surface and the front and rear sides of the polycrystalline diamond sheet are composed of the force surface BI 1 h 1 E, BI 2 h 2 E and force rib BE form. Among them, the force surface BI 1 h 1 E and force surface BI 2 h 2 E is a trapezoidal surface, and the force surface BI 1 h 1 E and force surface BI 2 h 2 E intersects the force edge BE and is symmetrical about the force edge BE. In the present invention, the force application surface B1 1 h 1 E and force surface BI 2 h 2E can be a trapezoidal plane, or a trapezoidal convex arc surface. However, in a preferred embodiment of the present invention, the force appli...
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Abstract
The invention discloses an anti-impact pickaxe-shaped diamond composite tooth which is mainly prepared by compounding a polycrystalline diamond sheet and a cylindrical hard alloy base body. The lower surface of the polycrystalline diamond sheet is connected with the upper surface of the hard alloy base body in a compounding manner; the upper surface and the front and rear side surfaces of the polycrystalline diamond sheet consist of force application surfaces BI1H1E and BI2H2E and a force application ridge BE; the right side surface of the polycrystalline diamond sheet consists of force application surfaces EFG1, EFG2, FG1H1C and FG2H2C and force application ridges EF, FC, FG1 and FG2; the left side surface of the polycrystalline diamond sheet consists of a force application surface BI1I2. The anti-impact pickaxe-shaped diamond composite tooth has a good drilling effect on rock stratums with higher hardness.
Description
technical field [0001] The invention relates to the field of drill bit manufacture, in particular to an impact-resistant pick-shaped diamond composite tooth. Background technique [0002] The polycrystalline diamond composite tooth is a composite material formed by sintering polycrystalline diamond sheet and cemented carbide matrix under high temperature and high pressure. The polycrystalline diamond composite sheet has the characteristics of high hardness and good wear resistance, and the cemented carbide matrix improves the flexibility and weldability of the composite material as a whole. The cemented carbide substrates of multiple polycrystalline diamond composite teeth are respectively embedded in the composite sheet mounting holes on the front face of the drill bit and fixed by brazing; the diamond part of the polycrystalline diamond composite tooth is exposed to the drill bit The front face of the drill bit, and as the most important cutting working surface on the dri...
Claims
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IPC IPC(8): E21B10/43
Inventor 周付坤
Owner 桂林星钻超硬材料有限公司