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Manufacturing technology of machining tool provided with polycrystalline diamond tool bit

A technology for polycrystalline diamond and machining tools, which is used in the manufacture of tools, metal processing equipment, tools for milling machines, etc. Large, unable to achieve high precision and long life, etc., to achieve the effect of good dimensional stability, low rejection rate and long service life

Inactive Publication Date: 2019-03-12
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, diamond-coated tools have 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. The tool is prone to coating peeling during high-speed milling, resulting in coating failure
The traditional polycrystalline diamond tool is made by directly welding the polycrystalline diamond cutting edge to the carbide blade or the cutter body, also called the solder piece pcd contour knife, but there are polycrystalline diamond knives with more complex shapes. The problem that the head processing tool is difficult to process, cannot meet the requirements of high precision and long life
At present, there are few reports on the processing methods of polycrystalline diamond cutter head processing tools with more complex shapes (the number of blades is greater than or equal to 10)

Method used

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  • Manufacturing technology of machining tool provided with polycrystalline diamond tool bit
  • Manufacturing technology of machining tool provided with polycrystalline diamond tool bit
  • Manufacturing technology of machining tool provided with polycrystalline diamond tool bit

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] see Figure 1 to Figure 2 , the invention provides a kind of manufacturing process of polycrystalline diamond cutter head machining tool 1, comprising:

[0040] The 100 blanks of the polycrystalline diamond cutter head and the 200 blanks of the handle are fixed in position with welding fixtures;

[0041] The corresponding end of the polycrystalline diamond cutter head 100 blank and the handle 200 blank is coated with solder paste and vacuum welded;

[0042] The other end of the polycrystalline diamond cutter head 100 blank is laser cut to form 32-36 cutting edges 21 evenly distributed in a ring, and chip removal grooves 22 are formed between adjacent cutting edges 21, and each cutting edge The blade width of 21 is 0.06-0.2 mm, the surface roughness Ra of each cutting edge 21 is 0.1-0.4 μm, and the helix angle of each cutting edge 21 is 35-55°.

[0043] As mentioned above, the manufacturing process of the polycrystalline diamond cutter head machining tool 1 of the pres...

Embodiment 2

[0065] A kind of manufacturing process of polycrystalline diamond cutter head machining tool 1, comprises the following steps:

[0066] (1) Provide rigid knife handle 200 blanks and polycrystalline diamond cutter head 100 blanks, the knife handle 200 blanks are made of tungsten carbide-based hard alloy material; polycrystalline diamond cutter head 100 blanks are passed through base layer 10 and The polycrystalline diamond layer 20 is formed by pressing and sintering. The base layer 10 is made of tungsten carbide-based hard alloy material. The polycrystalline diamond layer 20 is made of a composite of synthetic diamond powder and functional metal powder. The particle size of the synthetic diamond powder is The functional metal powder is a mixed powder of cobalt powder, nickel powder, chromium powder and tungsten carbide powder with a mass ratio of 0.5:3:3:3.5, and the mass percentage of cobalt in tungsten carbide-based hard alloy does not exceed 12% .

[0067] (2) Grinding and...

Embodiment 3

[0075] A kind of manufacturing process of polycrystalline diamond cutter head machining tool 1, comprises the following steps:

[0076] (1) Provide rigid knife handle 200 blanks and polycrystalline diamond cutter head 100 blanks, the knife handle 200 blanks are made of tungsten carbide-based hard alloy material; polycrystalline diamond cutter head 100 blanks are passed through base layer 10 and The polycrystalline diamond layer 20 is formed by pressing and sintering. The base layer 10 is made of tungsten carbide-based hard alloy material. The polycrystalline diamond layer 20 is made of a composite of synthetic diamond powder and functional metal powder. The particle size of the synthetic diamond powder is 400μm, the functional metal powder is a mixed powder of cobalt powder, nickel powder, chromium powder and tungsten carbide powder 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% .

[0077] (2) G...

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Abstract

The invention discloses a manufacturing technology of a machining tool provided with a polycrystalline diamond tool bit. A polycrystalline diamond tool bit blank and a tool shank blank are aligned andfixed by the aid of welding fixtures, and then corresponding ends of the polycrystalline diamond tool bit blank and the tool shank blank are coated with welding paste and are subjected to vacuum welding; the other end of the polycrystalline diamond tool bit blank is subjected to laser cutting to form 32-36 cutting blades which are distributed annularly and evenly, a chip removal groove is formedbetween every two adjacent cutting blades, the blade width of each cutting blade ranges from 0.06 mm to 0.2 mm, the surface roughness Ra of the cutting edge of each cutting blade ranges from 0.1 micron to 0.4 micron, and the helical angle of each cutting blade ranges from 35 degrees to 55 degrees. The obtained machining tool provided with the polycrystalline diamond tool bit has the good abrasionresistance, has the long service life at least twice that of a welding piece pcd contour tool, has the higher workpiece machining efficiency and is shorter in machining time, products machined by theaid of the machining tool provided with the polycrystalline diamond tool bit are good in size stability, the testing frequency is reduced, and the rejection rate is low.

Description

technical field [0001] The invention relates to the technical field of cutting tools, in particular to a manufacturing process of polycrystalline diamond cutting tools. 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 in 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 (MCD)...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23C5/10B23P15/34
CPCB23C5/1081B23C2210/04B23C2210/0485B23C2226/315B23P15/34
Inventor 颜炳姜李伟秋林一松
Owner CONPROFE TECH GRP CO LTD
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