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Machining tool of polycrystalline diamond tool bit

A technology of polycrystalline diamond and tool processing, which is applied in the direction of stone processing tools, metal processing equipment, stone processing equipment, etc., and can solve the problem of coating failure, inability to achieve high precision and long life, and non-existence of bonding force of diamond coating tools, etc. problem, to achieve the effect of a wide range of industrial value

Inactive Publication Date: 2018-12-07
CONPROFE TECH GRP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Compared with polycrystalline diamond tools and diamond-coated tools, the latter has problems such as weak bonding between the diamond coating and the cemented carbide substrate, and a large difference in thermal expansion coefficient between the coating and the substrate, resulting in internal stress. Coating peeling is prone to occur during milling, leading to coating failure
[0005] However, due to the addition of binders, the existing polycrystalline diamond tools have lower hardness and wear resistance than diamond-coated tools, but they do not have the serious bonding force problem of diamond-coated tools, but there are more blades. Polycrystalline diamond machining tools with complex shapes are difficult to process, and cannot meet the requirements of high precision and long life
At present, there are few reports on polycrystalline diamond processing tools with complex shapes with a large number of blades (the number of blades is greater than or equal to 10)

Method used

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  • Machining tool of polycrystalline diamond tool bit
  • Machining tool of polycrystalline diamond tool bit
  • Machining tool of polycrystalline diamond tool bit

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041]The present invention provides a processing tool with a polycrystalline diamond cutter head 100, which includes a cutter head 100 and a handle 200 connected to the cutter head 100. The cutter head 100 includes a base layer and a polycrystalline diamond covering the base layer. A crystalline diamond cutting layer 10, the polycrystalline diamond cutting layer 10 includes a cutting body 11 and 32-36 cutting edges 12 evenly distributed in a ring on the cutting body 11, and chip removal grooves are formed between adjacent cutting edges 12 13. The cutter head 100 and the cutter handle 200 are cylinders.

[0042] As mentioned above, the end of the base layer away from the polycrystalline diamond cutting layer 10 and the handle 200 are welded to the end of the handle 200 by welding to realize welding and fixing, so that the cutter head 100 and the handle 200 form an integral structure. It should be noted that the polycrystalline diamond cutting layer 10 is formed by molding and ...

Embodiment 2

[0064] A kind of polycrystalline diamond cutter head processing tool, comprising: a cutter head 100 and a handle 200 connected to the cutter head 100, the cutter head 100 includes a base layer and a polycrystalline diamond cutting layer 10 covering the base layer , the polycrystalline diamond cutting layer includes a cutting body 11 and 32-36 cutting edges 12 uniformly distributed on the cutting body in a ring shape.

[0065] Specifically, there may be 36 cutting edges 12 .

[0066] The base layer is made of tungsten carbide-based hard alloy material, and the cutting layer 10 is made of a composite of artificial diamond micropowder and functional metal powder, wherein the particle size of the artificial diamond micropowder is 360 μm, and the functional metal powder is cobalt powder, nickel powder, Chromium powder and tungsten carbide powder are mixed powders with a mass ratio of 0.5:3:3:3.5, and the mass percentage of cobalt in tungsten carbide-based cemented carbide does not ...

Embodiment 3

[0074] A kind of polycrystalline diamond cutter head processing tool, comprising: a cutter head 100 and a handle 200 connected to the cutter head 100, the cutter head 100 includes a base layer and a polycrystalline diamond cutting layer 10 covering the base layer , the polycrystalline diamond cutting layer includes a cutting body 11 and 32-36 cutting edges 12 uniformly distributed on the cutting body in a ring shape. Specifically, there may be 36 cutting edges 12 .

[0075] The base layer is made of tungsten carbide-based hard alloy material, and the cutting layer 10 is made of a composite of artificial diamond micropowder and functional metal powder, wherein the particle size of the artificial diamond micropowder is 380 μm, and the functional metal powder is cobalt powder, nickel powder, Chromium powder and tungsten carbide powder are mixed powders with a mass ratio of 0.5:3:3:3.5, and the mass percentage of cobalt in tungsten carbide-based cemented carbide does not exceed 12...

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Abstract

The invention discloses a machining tool of a polycrystalline diamond tool bit. The machining tool comprises a tool bit and a tool handle which is connected to the tool bit, and the tool bit comprisesa base layer and a polycrystalline diamond cutting layer covering the base layer; the polycrystalline diamond cutting layer comprises a cutting main body and 32-36 cutting edges, wherein the cuttingedges are annularly and uniformly distributed on the cutting main body, and the adjacent cutting edges form chip removal grooves; and the tool bit and the tool handle are cylinders. According to theinvention, the polycrystalline diamond layer comprises the cutting main body and the 32-36 cutting edges which are annularly and uniformly distributed on the cutting main body, the adjacent cutting edges form the chip removal grooves, so that the requirement for machining the polycrystalline diamond machining tool with a multi-cutting-edges and a complex shape in a machining process is met; due tothe fact that the cutting edge and the cutting main body are both polycrystalline diamond, the cutting edge does not need to be adhered to the cutting main body, so that the polycrystalline diamond machining tool is good in abrasive resistance and long in service life and is higher in workpiece machining efficiency for machining a workpiece.

Description

technical field [0001] The invention relates to the technical field of cutting tools, in particular to a cutting tool for processing polycrystalline diamond cutting heads. Background technique [0002] Diamond tools have the characteristics of extremely high hardness and wear resistance, high thermal conductivity, low thermal expansion coefficient, low friction coefficient, and low affinity with non-ferrous metals, which enable them to obtain high processing accuracy and processing efficiency in high-speed cutting. The processing characteristics of diamond tools are determined by the crystal structure of diamond. In diamond crystals, each carbon atom forms a covalent bond with four adjacent carbon atoms, and has a regular tetrahedral structure in space. The carbon atoms of this structure The binding force between them is extremely high, and it shows extremely high hardness on the macroscopic scale. [0003] At present, diamond tools mainly include monocrystalline diamond (M...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B28D1/18B24D7/18B24D7/00
Inventor 颜炳姜李伟秋林一松
Owner CONPROFE TECH GRP CO LTD
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