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Diamond micro drilling tool and machining method thereof

A processing method and diamond technology, applied in metal processing equipment, manufacturing tools, metal material coating technology, etc., can solve the problems that affect the processing accuracy and life of drill needles, the high edge height of diamond abrasive grains, and the limited service life of micro drills, etc. , to achieve the effect of reducing friction coefficient, low cost and improving wear resistance

Active Publication Date: 2018-02-09
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the micro-drills prepared by the composite electroplating method have low hardness, high coating porosity, and uneven coating thickness, which seriously affect the machining accuracy and life of the drill.
[0004] At present, the consolidated abrasive grain layer of the micro-drill prepared by the composite electroplating method is a single alloy coating. Due to the low wear resistance of the single alloy coating, the coating is easily worn during the drilling process, resulting in excessive cutting edge height of the diamond abrasive grains. , easy to fall off, so that the service life of the micro drill is limited

Method used

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  • Diamond micro drilling tool and machining method thereof
  • Diamond micro drilling tool and machining method thereof
  • Diamond micro drilling tool and machining method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0075] The selected micro-drill is made of cemented carbide, and the shape of the micro-drill is cylindrical, with a diameter of 0.5 mm and a length of 2 mm.

[0076] (1) Preparation of composite plating solution

[0077] Select the nano-diamond microparticles with a particle diameter of 3-10nm, the polytetrafluoroethylene microparticles with a particle diameter of 5-15nm, and the micron diamond microparticles of 10 μm. The nano-diamond microparticles are weighed at 0.5% by mass fraction of the nano-diamond microparticles. 0.2% weighed nano-polytetrafluoroethylene particles, weighed micron diamond particles by mass fraction of 50%, removed diamond particles surface grease and other impurities with 5% concentrated nitric acid solution, and then cleaned to medium with deionized water. sex. Add OP-10 emulsifier and polyethylene glycol dispersant, then add deionized water, and ultrasonically stir to prepare diamond suspension. Add nano-polytetrafluoroethylene into the solution c...

Embodiment 2

[0090] The material of the selected micro-drill is cemented carbide, and the shape of the micro-drill is cylindrical, with a diameter of 1 mm and a length of 4 mm.

[0091] (1) Preparation of composite plating solution

[0092] Select nano-diamond particles with a particle size of 100nm, polytetrafluoroethylene particles with a particle size of 50nm, and micron diamond particles with a particle size of 10 μm. The nano-diamond particles are weighed at 1% by mass fraction, and 0.5% by mass fraction. Nano-polytetrafluoroethylene particles, by weighing micron diamond particles with a mass fraction of 5%, use 60% concentrated sulfuric acid solution to remove diamond particle surface grease and other impurities on the diamond particles, and then clean them to neutral with deionized water. Add sodium hexametaphosphate and sodium lauryl sulfate surfactant, polyethylene glycol dispersant, then add deionized water, stir ultrasonically to prepare diamond suspension, add nano-polytetraflu...

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Abstract

The invention discloses a diamond micro drilling tool and a machining method thereof. A grinding layer is plated on the surface of the micro drilling tool, and comprises a fixed grain composite plating layer and micron diamonds; and the fixed grain composite plating layer comprises nanometer diamonds and nanometer polytetrafluoroethylene. Meanwhile, the invention further discloses the machining method of the diamond micro drilling tool. A chemical composite plating method is adopted to prepare a micro drill containing diamonds; and the micro drill is prepared by using a chemical plating method, and has the characteristics of simple process, low cost and good wear resistance. The fixed grain composite plating layer in the grinding layer comprises the nanometer diamonds and a polytetrafluoroethylene composite plating layer; the nanometer diamonds are added to achieve higher hardness of the composite plating layer and better wear resistance; the wear resistance of the plating layer and the holding force of a fixed grain layer to diamond abrasive grains are improved; and nanometer polytetrafluoroethylene particles can reduce friction between the plating layer and a hole wall, reduce the wear of the fixed grain layer, and prolong the service life of the micro drill.

Description

technical field [0001] The invention relates to a diamond micro-drilling tool and a processing method thereof. Background technique [0002] With the development of industrial technology, the demand for microstructure processing of hard and brittle materials, as well as micro components and micro products in the fields of electronics, machinery, and biotechnology is increasing. At present, the methods suitable for micro-processing of hard and brittle materials mainly include micro-ultrasonic machining and micro-laser machining. Because micro-ultrasonic machining has no thermal effect, it can process tiny three-dimensional structures with high aspect ratios, and the surface quality and machining accuracy of parts are high, which determines that micro-ultrasonic machining has unique advantages in the processing of microstructures of hard and brittle materials. [0003] Micro-drilling plays a very important role in micro-ultrasonic machining. General micro-drilling is to use a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C18/32C23C18/16B24D3/34
CPCB24D3/34C23C18/1662C23C18/1692C23C18/32
Inventor 张凤林王健周玉梅刘文广张腾李伟雄
Owner GUANGDONG UNIV OF TECH
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