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Fine-grinding parameter determinator and application thereof

A parameter measurement and fine grinding technology, applied in the field of mechanical processing, can solve the problems of inconvenient measurement of silicon nitride grinding parameters, large equipment investment, high noise, etc., and achieve the effects of convenient measurement, accurate loading and fast rotation speed.

Pending Publication Date: 2017-07-25
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, grinding machines are mostly used for silicon nitride machining. This method requires a large investment in equipment, inconvenient measurement of silicon nitride grinding parameters, inaccurate data, high noise, power consumption, and environmental protection.

Method used

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  • Fine-grinding parameter determinator and application thereof
  • Fine-grinding parameter determinator and application thereof
  • Fine-grinding parameter determinator and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] A small-scale precision grinding processing parameter tester, the tester includes an adjustable speed motor 1, a grinding wheel 2, a sample 3, a loading system and a water cooling system (quantitative water storage 2000ml, flow regulating valve, delivery conduit), during grinding During the process, cooling water is continuously sprayed on the grinding surface through the conveying conduit.

[0034] The sample is a small columnar Si 3 N 4， But the material is not limited to Si 3 N 4 Can be various ceramic materials or various superhard alloys, small columnar Si 3 N 4 The sample is the manufacturer's Si 3 N 4 The powder is sintered at 1450 degrees under high pressure and air pressure, with a relative density of 98.2% and a Vickers hardness of 1500Kg / mm 2 , The sample diameter is 5-14mm, and the height is 3-15mm.

[0035] The adjustable speed motor 1 is a miniature high-speed motor with a diameter of 64.2mm and a length of 300mm. The speed can reach 0~30000r / min, ...

Embodiment 2

[0045] Utilize the measuring instrument of embodiment 1 to adopt that relative density is 98.2%, and Vickers hardness is 1500Kg / mm 2 , the surface roughness of gas pressure sintered silicon nitride materials was measured under different grinding conditions. The processing conditions are 15000r / min, 5Kg / cm 2 Under load, when the water supply is 3ml / s, the glass-based diamond grinding wheel with a diamond particle size of 170 / 200 (25%) is used for grinding, and the average surface roughness is 1135nm. The two-dimensional picture of the grinding marks of silicon nitride ceramics with 170 / 200 mesh grinding wheel figure 2 shown. The three-dimensional image of grinding marks of silicon nitride ceramics with 170 / 200 mesh grinding wheel image 3 shown.

Embodiment 3

[0047] The difference between this embodiment and embodiment 2 is that

[0048] The processing conditions are 25000r / min, 5Kg / cm 2 Under load, when the water supply is 10ml / s, the glass-based diamond grinding wheel with a diamond particle size of 230 / 270 (25%) is used for grinding, and the average surface roughness is 688nm. Two-dimensional diagram of grinding marks of silicon nitride ceramics with 230 / 270 mesh grinding wheel Figure 4 shown.

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Abstract

The invention relates to a fine-grinding parameter determinator. The determinator adopts a speed adjustable motor, a sand wheel, a test sample, a loading lever with an adjustable cutter feeding amount and a water cooling system to form a device. By adopting the determinator, parameters such as grinding speeds, surface coarseness, precision and the like of different types of grinding sand wheels (metal-based combined diamond sand wheels, glass-based combined diamond sand wheels and the like) for Si3N4 materials, various ceramic materials or various ultra-hard alloys at different grinding speeds and under different grinding pressure can be rapidly determined in a short time. Meanwhile, the friction abrasion parameter of the surface of silicon nitride materials and other materials when in pairing friction movement can be determined.

Description

technical field [0001] The invention mainly belongs to the field of mechanical processing, and in particular relates to an ultra-small silicon nitride precision grinding processing parameter measuring instrument and an application thereof. Background technique [0002] As an important member of the family of high-temperature structural ceramics, the reason why silicon nitride ceramics have been so favored and valued in the past two or three decades is that they have excellent physical and chemical properties, such as high hardness, high temperature stability and excellent resistance to corrosion. wear performance. These characteristics make silicon nitride widely used in industry, such as: silicon nitride ceramic bearings, which have been used in important fields such as precision machine tools, automobiles, aero engines, chemical instruments, and nuclear industries. [0003] Si 3 N 4 It is a hard and brittle material that is difficult to process, and encounters many prob...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/56
CPCG01N3/56G01N2203/0003G01N2203/0019G01N2203/0641
Inventor 郭志猛吴成义袁蛟蛟郝俊杰龙海明王俊资李伸张欣悦李沛刘世峰张晓冬崔倩月赵德超
Owner UNIV OF SCI & TECH BEIJING