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PCD cutter with high performance

A high-performance, cutting tool technology, applied in the direction of cutting tools, milling cutters, drilling tool accessories, etc. used in lathes, can solve the problems of horizontal lines on the workpiece, low surface finish of the workpiece, and insufficient surface brightness of the workpiece, and achieves a high level of improvement. Surface brightness, avoid chipping or cracking, strong oxidizing effect

Inactive Publication Date: 2015-04-29
深圳章源精密工具技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] When the PCD tool cuts the workpiece, because the hardness difference between diamond and metal cobalt is very large, and the metal cobalt is dispersed among the diamond particles, it will cause horizontal stripes on the surface of the workpiece, and the surface finish of the workpiece is not high. Surface brightness is not enough

Method used

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  • PCD cutter with high performance

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A kind of high-performance PCD cutter, its manufacture method comprises the following steps:

[0029] 1) A PCD cutter is provided, comprising a cutter base and a PCD blade welded on the cutter base, the PCD blade is composed of a blade base and a polycrystalline diamond layer;

[0030] 2) Spray Teflon on the outer surface of the part of the PCD cutter except the polycrystalline diamond layer to form a protective layer; wherein, the part of the PCD cutter except the polycrystalline diamond layer specifically refers to the cutter substrate and the blade substrate; Before spraying Teflon, the PCD tool should be ultrasonically cleaned with cleaning solution for 10-15 minutes, rinsed with deionized water for 3-5 times, and dried in a vacuum drying oven at 120°C for 1 hour. This process is to ensure that the tool surface is clean and Teflon sprayed evenly when the tool surface is sprayed with Teflon. Since the Teflon coating has stable chemical properties and is insoluble in...

Embodiment 2

[0036] The characteristics of this embodiment are: in step 3), the formula of the cobalt removal solution is: 98% concentrated sulfuric acid 15 at.%, nitric acid 20 at.%, phosphoric acid 10 at.%, hydrogen peroxide 15 at.%, pure water as solvent. Put the PCD tool treated in step 2) into the above-mentioned cobalt-removing solution, set the reaction temperature to 70°C, stir the cobalt-removing solution evenly, and react for 3 hours; then take out the PCD tool and clean it until neutral; finally remove the PCD tool Teflon sprayed on the outer surface, that is.

[0037] After testing, the removal width of the metal cobalt element in the polycrystalline diamond layer on the rake face of the PCD tool is 1-3 mm, and the removal thickness of the metal cobalt element in the polycrystalline diamond layer on the flank face of the PCD tool is 0.05-0.1 mm.

[0038] Others are the same as in Example 1.

Embodiment 3

[0040]The characteristics of this embodiment are: in step 3), the formula of cobalt removal solution is: 98% concentrated sulfuric acid 15 at.%, nitric acid 30 at.%, phosphoric acid 15 at.%, hydrogen peroxide 10 at.%, purified water as solvent. Put the PCD tool treated in step 2) into the above-mentioned cobalt-removing solution, set the reaction temperature to 60°C, stir the cobalt-removing solution evenly, and react for 2 hours; then take out the PCD tool and clean it until neutral; finally remove the PCD tool Teflon sprayed on the outer surface, that is.

[0041] After testing, the removal width of the metal cobalt element in the polycrystalline diamond layer on the rake face of the PCD tool is 1-3 mm, and the removal thickness of the metal cobalt element in the polycrystalline diamond layer on the flank face of the PCD tool is 0.05-0.1 mm.

[0042] Others are the same as in Example 1.

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Abstract

The invention discloses a PCD cutter with high performance. A manufacturing method comprises the following steps: (1) providing the PCD cutter including a cutter base body and a PCD blade which is welded on the cutter base body and consists of a blade base body and a polycrystalline diamond layer; (2) spraying Teflon on a part of outer surface, except the polycrystalline diamond layer, of the PCD cutter to form a protective layer; (3) preparing cobalt-etching solutions, putting the PCD cutter into the cobalt-etching solutions and uniformly stirring the cobalt-etching solutions for 0.5-3 hours at the temperature of 50-90 DEG C; taking out the PCD cutter; cleaning to be neutral; finally removing the Teflon sprayed on the outer surface of the PCD cutter. According to the PCD cutter, metal cobalt in the polycrystalline diamond layer at the edge opening of the PCD cutter is removed, so that the phenomenon that blade breaking or breakage caused by the edge opening of the PCD cutter because of the metal cobalt can be avoided, the service life of the PCD cutter is prolonged, and the surface luminance of processing pieces is improved.

Description

technical field [0001] The invention relates to a high-performance PCD cutting tool, which belongs to the field of superhard material processing. Background technique [0002] Polycrystalline diamond (PCD) tools are tools made by welding PCD composite sheets to carbide or steel cutter bodies. Since the PCD composite sheet combines the high hardness, wear resistance, low friction coefficient and strength of single crystal diamond with the high bending strength of tungsten carbide cemented carbide, the tungsten carbide cemented carbide layer of the composite sheet provides the diamond layer with Mechanical support, which increases its flexural strength, while the carbide layer is easily weldable, making it easy to fabricate finished knives. [0003] The characteristics of PCD composite sheet, PCD composite sheet with extremely high hardness and unique mechanical properties is sintered by adding a certain amount of metal cobalt and cemented carbide matrix to diamond micropowde...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23C5/00C23F1/28
CPCB23B27/00B23B2226/315B23P15/28C23F1/28C23F1/02
Inventor 张明菊吴建军陈福平刘明正
Owner 深圳章源精密工具技术有限公司
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