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Self-lubricating coating tool prepared based on electric discharge deposition and its preparation method

A technology of EDM deposition and self-lubricating coating, applied in coating and metal material coating process, etc., can solve the problems of coating damage, fall off, cannot be repaired, peeling, etc., so as to reduce tool wear and improve friction and lubrication state. , the effect of preventing adhesion

Inactive Publication Date: 2016-04-20
QINGDAO UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Scholars at home and abroad have conducted a lot of research on self-lubricating coating tools, but how to ensure the bonding strength, thickness, and self-lubricating properties of the self-lubricating coating of the tool at the same time has not been effectively resolved.
Especially once the coating is partially damaged, it cannot be repaired, and it is easy to cause the entire coating to be damaged and peeled off.
For example, when the coating produces a large stress, it will produce cracks, peeling, etc., resulting in failure

Method used

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  • Self-lubricating coating tool prepared based on electric discharge deposition and its preparation method

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Effect test

Embodiment 1

[0022] A self-lubricating coating tool prepared based on electric spark deposition and a preparation method thereof. The base material of the tool is YT15 hard alloy, and the electrodes are bundled with copper microtubes. Concrete preparation steps are as follows:

[0023] (1) Preparation of electrodes

[0024] Six copper tubes with a diameter of 1 mm were filled with BN powder, and the average diameter of the particles was 2 microns. Then 6 copper tubes are tightly bundled together with fine copper wires, and the whole bundled copper tubes are used as electrodes.

[0025] (2) Deposition of self-lubricating coating on the surface of the blade

[0026] (1) Grind the base material of the tool with 80# sandpaper first to remove the oxide film on the surface of the substrate, then use 600# sandpaper to polish, then use acetone to perform ultrasonic cleaning for 15 minutes to remove surface oil, and then put it in a vacuum drying oven to dry After that, spare.

[0027] (2) Inst...

Embodiment 2

[0030] A self-lubricating coating tool prepared based on electric spark deposition and a preparation method thereof. The base material of the tool is W6Mo5Cr4V2 high-speed steel, copper is used to prepare a cylindrical electrode, and the end surface is processed with micro-holes. Concrete preparation steps are as follows:

[0031] (1) Preparation of electrodes

[0032] Pure copper is prepared as an electrode with a diameter of 6mm, and microholes are drilled on the end face, with a diameter of 1mm and a depth of 5mm, and MoS is filled in it 2 Solid lubricant, the average particle diameter is 2um. The microwells are arranged as shown in the figure.

[0033] 2) Deposition of self-lubricating coating on the surface of the blade

[0034] (1) Grind the base material of the tool with 80# sandpaper first to remove the oxide film on the surface of the substrate, then use 600# sandpaper to polish, then use acetone to perform ultrasonic cleaning for 15 minutes to remove surface oil, ...

Embodiment 3

[0038] A self-lubricating coating tool prepared based on electric spark deposition and a preparation method thereof. The base material of the tool is YT15 hard alloy, and the electrodes are bundled with nickel microtubes. Concrete preparation steps are as follows:

[0039] (1) Preparation of electrodes

[0040] Five nickel tubes with a diameter of 2 mm were filled with BN powder, and the average diameter of the particles was 2 microns. Then 5 nickel tubes are tightly bundled together with thin copper wires, and the whole bundled nickel tubes are used as electrodes.

[0041] (2) Deposition of self-lubricating coating on the surface of the blade

[0042] (1) Grind the base material of the tool with 80# sandpaper first to remove the oxide film on the surface of the substrate, then use 600# sandpaper to polish, then use acetone to perform ultrasonic cleaning for 15 minutes to remove surface oil, and then put it in a vacuum drying oven to dry After that, spare.

[0043] (2) Ins...

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Abstract

The invention provides a self-lubricating coated cutting tool prepared on the basis of electric spark deposition and a preparation method thereof and belongs to the technical field of manufacturing of a mechanical cutting tool. A base material of the cutting tool is high-speed steel or hard alloy; a soft metal microcapillary electrode or an electrode of which the end face is provided with a microstructure is adopted; the microcapillary electrode or the microstructure of the electrode is full filled with a solid lubricant and then a self-lubricating coating is prepared on the surface of the cutting tool by adopting electric spark deposition. According to the invention, by utilizing the electric spark deposition technology, the cutting tool not only has a self-lubricating effect, but also has high bonding strength in the dry cutting process; due to the result, on one hand, a friction lubricating state of the cutting tool in the dry cutting process can be greatly improved, friction can be reduced, adhesion is prevented, a cutting force and a cutting temperature are reduced and wear of the cutting tool is reduced, and on the other hand, service life of the cutting tool can be prolonged. The self-lubricating coated cutting tool can be widely applied to dry cutting and cutting machining of materials difficult to machine.

Description

technical field [0001] The invention belongs to the technical field of mechanical cutting tool manufacturing, and in particular relates to a self-lubricating coating tool based on electric spark deposition and a preparation method thereof. Background technique [0002] During the cutting process, the rake face and the flank face of the tool are constantly in contact with the chip and the workpiece, and strong friction occurs, which will cause the tool to passivate and the surface quality of the workpiece to deteriorate. At the same time, friction also causes a large amount of energy loss. At present, the main way to reduce the friction and wear of cutting tools at home and abroad is to use cutting fluid with certain lubricating effect. However, under high-speed cutting, due to the high cutting temperature, the cutting fluid lubrication has disadvantages such as insufficient lubrication and performance degradation under the action of high cutting temperature. Therefore, for...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C26/02
Inventor 曹同坤单春生
Owner QINGDAO UNIV OF SCI & TECH
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