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Diamond grinding disc and preparation method thereof

A diamond and diamond cutter head technology, which is applied in the field of diamond grinding discs and its preparation, can solve the problems of low construction efficiency, increased consumption of abrasive tools, repair and rework, etc., and achieve stability and grinding accuracy, good sharpness, and good stability Effect

Active Publication Date: 2019-08-16
江苏友美工具有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above-mentioned grinding discs have high grinding efficiency and service life when applied to the grinding of hard and brittle materials such as hard concrete. When the concrete pavement with high surface roughness and flatness requirements is polished, rework and rework often occur because the construction requirements cannot be met, resulting in low construction efficiency, which not only increases the consumption of abrasive tools, but also significantly increases labor costs.

Method used

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  • Diamond grinding disc and preparation method thereof
  • Diamond grinding disc and preparation method thereof

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preparation example Construction

[0025] In the present invention, the diamond segment is formed by cold-pressing and hot-pressing sintering from a mixed powder composed of a metal bond containing tungsten carbide, diamond particles, graphite particles and metal halide additives. As an example, the preparation method may include the following steps: (1) preparing a metal bond comprising tungsten carbide, diamond particles, graphite particles and metal halide additives, and mixing to obtain a mixed powder; (2) mixing the mixed powder in Cold pressing in the mold to obtain the cutter head body; (3) hot pressing and sintering the cutter head body, the hot pressing sintering temperature is 780-850°C, and the pressure is 200-300kg / cm 2 , and the hot-press sintering was carried out in an oxygen-poor atmosphere. The oxygen-depleted atmosphere refers to an atmosphere containing 1-20v% air and the rest nitrogen. Hot press sintering is carried out in an oxygen-poor atmosphere. On the one hand, part of the graphite part...

Embodiment 1

[0040] Take 3.2kg of copper powder, 3.2kg of iron, 0.8kg of nickel, 2kg of tungsten carbide, and 0.8kg of tin, put them into the mixing tank and mix for 30 minutes, then add 0.08kg of graphite particles, CoCl 2 0.02kg, diamond 0.15kg, continue mixing for 2 hours, pour the powder into the mold for cold pressing, hot pressing sintering, hot pressing sintering temperature is 850°C, pressure 220kg / cm 2 , the holding time is 5 minutes, the sintering atmosphere includes 10v% air, and the balance is N 2 . Grind the cutter head with the grinding wheel and abrasive belt, put the cutter head and the silver solder piece together on the corresponding substrate position according to the requirements of the drawing, adjust the welding position and heat and melt the silver solder sheet, so that the cutter head and the substrate are welded together, and then use 600N / mm 2 Strength standard Welding strength test is carried out for each diamond segment, and the dry-type diamond grinding wheel ...

Embodiment 2

[0042] Take 2.5kg of copper powder, 4.1kg of iron, 1.5kg of nickel, 1.5kg of tungsten carbide, and 0.4kg of tin, put them into the mixing tank and mix for 30 minutes, then add 0.08kg of graphite particles, LaF 3 0.03kg, diamond 0.15kg, continue mixing for 2 hours, pour the powder into the mold for cold pressing, hot pressing sintering, hot pressing sintering temperature is 850°C, pressure 220kg / cm 2 , the holding time is 5 minutes, the sintering atmosphere includes 20v% air, and the balance is N 2 . Grind the cutter head with the grinding wheel and abrasive belt, put the cutter head and the silver solder piece together on the corresponding substrate position according to the requirements of the drawing, adjust the welding position and heat and melt the silver solder sheet, so that the cutter head and the substrate are welded together, and then use 600N / mm 2 Strength standard Welding strength test is carried out for each diamond segment, and the dry-type diamond grinding wheel...

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Abstract

The invention relates to a diamond grinding disc and a preparation method thereof, and belongs to the technical field of diamond tools. The diamond grinding disc comprises a disc-shaped base body, first and second diamond tool bits are arranged on the surface of the disc-shaped base body in a spaced manner, the first and second diamond tool bits are in segment shapes, and horizontal projections are each in a shape formed by two parallel arc sides and two straight sides; the connecting line of the midpoints of the two straight sides form the length direction of the first and second diamond toolbits; the edge of one arc side of the first diamond tool bit extends along the outer edge of the base body; one straight side of the second diamond tool bit is arranged to be close to the outer edgeof the base body, and the length direction extends in the radial direction. The diamond grinding disc can be applied to an airport runway, a bridge project, a highway and application places, such as special reinforced concrete, with high requirements for concrete surface grinding smoothness and roughness.

Description

technical field [0001] The invention relates to the technical field of diamond tools, more specifically, the invention relates to a diamond grinding disc and a preparation method thereof. Background technique [0002] Diamond abrasive tools are a general term for abrasive products that use diamond particles as abrasive grains and bond them with various binders (mainly including metals, ceramics, and resins) to form abrasive products with a certain geometric shape. Due to the mechanical properties of diamond abrasives such as high hardness, high strength, and excellent wear resistance, in the grinding process, the size, shape and appearance of diamond abrasive grains change little, and the grinding quality is better. Moreover, the abrasive grains of the diamond abrasive can maintain good micro-edge properties for a long time, and the good cutting performance ensures a small grinding force during the grinding process, significantly reduces frictional heat, and can avoid burns ...

Claims

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Application Information

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IPC IPC(8): B24D3/10B24D7/06B24D18/00
CPCB24D7/06B24D3/10B24D18/0009B24D7/066B24D18/009
Inventor 万益俊
Owner 江苏友美工具有限公司
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