JPS6047068B2 - Manufacturing method of rotary cutting grindstone - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a rotary cutting grindstone that effectively dissipates heat generated during cutting, maintains effective cutting over a long period of time, and also provides a coloring effect. This relates to a manufacturing method.

Various types of rotary cutting wheels are known, but in general, when cutting with these rotary cutting wheels, a high amount of heat is generated, and this heat generation deteriorates the organic binder, which is a component of the grinding wheel. However, as a result, the binding ability of the binder decreases significantly, which causes the grinding wheel to wear out rapidly, or the abrasive grains scatter, posing a danger to workers.Furthermore, the grinding wheel is colored black. In a grinding wheel to which carbon is added, there have been many disadvantages such as the heating effect of the grinding wheel causing a quenching phenomenon in the carbon, which hardens and makes the grinding wheel brittle.

In order to solve these inconveniences, the inventors have developed a grinding wheel with a structure in which aluminum foil is attached to both sides of the grinding wheel, and the heat generated during grinding is radiated by heat conduction due to the action of the aluminum foil. It has become a legal right. Such a grindstone for sumo wrestlers requires a step of pasting aluminum foil on both sides of the grindstone after molding, which reduces mass production and increases costs. There was a tendency for heat dissipation to be insufficient with only aluminum foil attached to both sides. The present invention has been made in view of the above, and is a method for manufacturing a cutting grindstone, which is capable of effectively dissipating heat (cooling) during cutting work, and also enables mass production of a grindstone in which the entire grindstone is colored silver. It provides:

That is, in the present invention, abrasive grains and a binder of thermosetting resin particles added to bond the abrasive grains to each other are mixed, and then fine particles smaller than the abrasive grains of 100 to 30 m are added to the mixture. A certain aluminum fine powder is mixed at a ratio of 0.5 to 2% by weight based on the amount of abrasive grains, and then the mixture is filled into a press mold and pressed to form a disc and heated at a high temperature of about 200°C. This is to produce a rotary cutting grindstone that is solidified and bonded by firing.

Therefore, according to the rotary cutting grindstone of the present invention, the heat generated during cutting is effectively dissipated by mixing the aluminum fine powder, and the cutting effect does not deteriorate over a long period of time, and furthermore, due to the action of the aluminum fine powder, It is possible to provide a cutting wheel that has a silver color and has a great aesthetic effect. The present invention will be described in detail below based on embodiments shown in the drawings.

First, the raw material 1 for pressure forming the cutting wheel will be specifically described.

This raw material 1 is made by mixing abrasive grains and a thermosetting binder, and after these components are completely mixed, fine aluminum powder, which is a fine particle of 100 to 30 square meters, is added to this mixture at a rate of 0% to 0.00% of the amount of abrasive grains mixed. ．．
The raw material is a mixture of 5 to 2% by weight and a complete mixture of these ingredients. The raw material thus obtained is filled into a mold 2 and pressed by a pressing mold 3 to form a disc-shaped grindstone. Next, this molded part is heated and solidified at a temperature of about 200°C to produce a product. During this heating, the binder contained in the raw material melts and adheres to the circumferential surface of each abrasive grain. At the same time, the aluminum derivative is soldered to each abrasive grain and bonded and hardened. As described above, according to the rotary disk of the present invention, since the fine aluminum powder mixed in the raw material is molded into the abrasive grains via the thermosetting binder, the heat generated during cutting is transferred to the abrasive grains. Heat is effectively dissipated by the molded aluminum fine powder, which prevents the grinding wheel from becoming abnormally hot and maintains sharp cutting power over a long period of time.

Furthermore, the aluminum fine powder molded into each abrasive grain makes the entire raw material, that is, the molded whetstone, silver-colored, and a sufficient coloring effect and aesthetic effect can be obtained. In other words, in the past, carbon or red oxide was added to the grindstone to color it, but the addition of carbon made the molded product brittle due to the heating effect as described above, and the addition of red oxide caused has the disadvantage of discoloration due to the action of heating, but the present invention uses fine aluminum powder that has heat resistance and gas resistance, so it does not discolor and is of good quality and is not affected by gases generated during heating. It has the advantage of providing a rotating cutting grindstone.

[Brief explanation of the drawing]

The drawing is an explanatory view showing one example of manufacturing a rotary cutting grindstone according to the present invention. 1...Raw material, 2...Mold, 3...
...Press type.

Claims (1)

[Claims] 1. Mix the abrasive grains with a binder of thermosetting resin particles added to bond the abrasive grains together, and then add aluminum particles, which are fine particles smaller than the abrasive grains of No. 100 to No. 300, to this mixture. Fine powder is mixed at a ratio of 0.5 to 2% by weight based on the amount of abrasive grains, and then the mixture is filled into a pressing mold and pressed to form a disk and solidify by heating at a high temperature of about 200 ° C. A method for manufacturing a rotary cutting grindstone characterized by firing and bonding.