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Mechanical cutter grinding method of high-precision diamond Vickers pressing head

A diamond, high-precision technology, applied in other manufacturing equipment/tools, manufacturing tools, etc., can solve the problems of unreachable nano-hardness measurement, breakage, low precision of diamond indenters, etc., achieve good processing quality, offset processing errors, The effect of high processing efficiency

Active Publication Date: 2017-12-15
HARBIN INST OF TECH
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  • Abstract
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  • Application Information

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Problems solved by technology

Domestic manufacturers of diamond indenters, such as Shanghai Natural Diamond Tool Factory, Haosu Diamond Tools Co., Ltd., Toyo Diamond Tools Co., Ltd., etc., generally provide diamond indenters with low precision, and the radius of the blunt circle at the tip is several hundred nanometers to A few microns, the length of the chisel edge at the tip is also in the micron level, and there are even obvious damages, which cannot meet the standard of nano-hardness measurement

Method used

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  • Mechanical cutter grinding method of high-precision diamond Vickers pressing head
  • Mechanical cutter grinding method of high-precision diamond Vickers pressing head
  • Mechanical cutter grinding method of high-precision diamond Vickers pressing head

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specific Embodiment approach 1

[0041] Specific embodiment one: a kind of mechanical sharpening method of high-precision diamond Vickers indenter, described method step is as follows:

[0042] Step 1: Choose regular hexahedral natural diamond particles as the material of the head of the indenter, and the material of the indenter handle is an iron-nickel alloy with a very low thermal expansion coefficient (this alloy material can maintain a stable length in the temperature range of -80°C to 200°C properties), prepare the indenter handle according to the design parameters of the indenter handle and the particle size of the hexahedral natural diamond, such as image 3 a) as shown;

[0043] A mechanical sharpening method of a high-precision diamond Vickers indenter, the steps of the method are as follows:

[0044] Step 2: Use the vacuum brazing method to realize the stable connection between the diamond particles and the indenter handle; first clean the indenter handle with alcohol to remove pollutants; then, p...

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Abstract

The invention discloses a mechanical cutter grinding method of a high-precision diamond Vickers pressing head, and belongs to the technical field of nano hardness measuring. From the diamond crystal obvious anisotropy and extremely high wear resistance characteristics, the mechanical cutter grinding method is adopted to machine a rectangular pyramid diamond Vickers pressing head. Through the grinding process experiment of the rectangular pyramid diamond Vickers pressing head, the rule of the influence of the diamond abrasive grain, the grinding pressure, the grinding disc rotating speed, the reciprocated motion stroke, the reciprocated motion frequency and other process parameters on the tip-end finely rounded radius, the edge finely rounded radius and the tip end transverse blade can be analyzed in detail, and the optimal diamond Vickers pressing head grinding process is built. In order to break through the abroad technical barrier and improve the manufacturing process level of the national diamond Vickers pressing head, the exploratory advance is achieved.

Description

technical field [0001] The invention relates to a mechanical sharpening method of a diamond Vickers indenter, which belongs to the technical field of nano hardness measurement. Background technique [0002] With the development of nanoscience and technology, the demand for mechanical performance evaluation of material surface, thin film, coating and tiny components is increasing, and nanoindentation technology has developed vigorously. Vickers indentation experiment has become the first choice for nanoindentation experiment because of its advantage that the size of the load does not affect the measurement results. However, the four conical surfaces of the Vickers indenter are difficult to intersect at one point, and a chisel edge will be formed at the tip, so most nanoindentation experiments are replaced by an improved glass indenter with the same area function. However, compared with the Vickers indenter, the Vickers indenter bears a larger load and has unique advantages i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B24B1/00B24B3/00
CPCB24B1/00B24B3/00
Inventor 宗文俊魏宗磊孙涛
Owner HARBIN INST OF TECH
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