What is the principle of making abrasives tools?

The manufacturing process of fixed abrasives includes: dispensing, mixing, forming, heat treating, processing and inspection. The bonding technology is different and the production process is different. The ceramic bonded abrasive tool first adopts a pressing method, and the abrasive tool and the binder are weighed according to the components of the formulation, and then uniformly mixed in a mixer and placed in a metal mold to form an abrasive blank. In the media. The billet is dried and then calcined in a kiln at a firing temperature of typically 1300 °C. When a low melting point fused agent is selected, the firing temperature is lower than 1000 °C. Then perform precise machining according to the rule scale shape and finally view the product.

The resin-bonded abrasive is usually formed on a press at room temperature, and is a hot pressing technique in which heating is performed while heating under heating. After molding, it hardens in a hardening furnace. When a phenol resin is used as the binder, the curing temperature is from 180 to 200 °C.

First, the rubber-bonded abrasive was mixed by a roll mill, rolled into a sheet, and then punched and formed by a punching knife. Some of them were loosened and placed in a metal mold to be formed on a press. After molding, it is vulcanized in a vulcanization can at a temperature of 165 to 180 °C.

Metal bonded abrasives are made by powder metallurgy and electroplating and are used primarily for superabrasive bonded abrasives. The powder metallurgy method uses bronze or the like as a binder, and after mixing the mixture, it is subjected to hot pressing or press molding at room temperature, and then sintered. The electroplating method uses nickel or a nickel-cobalt alloy as a plating metal, and the abrasive is fixed on a substrate by an electroplating technique to prepare an abrasive tool.

A special type of grinder has a sintered corundum abrasive and a fiber abrasive. The sintered corundum abrasive was prepared by mixing alumina powder with an appropriate amount of chromium oxide and sintering at 1800 °C. This abrasive has a compact structure and high strength. Mainly used for the processing of parts such as watches and clocks. Fiber abrasives are made from fiber yarns (eg, nylon filaments) that are enriched or adhered to the abrasive. They have good elasticity and are mainly used for polishing metal materials and their products.

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