A special grinding wheel for grinding trains containing superabrasive cermet bond and its preparation method

Abstract

The invention relates to a grinding wheel special for train grinding and containing superhard abrasive metal and ceramic binding agents and a preparation method of the grinding wheel. The grinding wheel is made of the following raw materials of CBN abrasive, the metal binding agent, an auxiliary abrasive, the ceramic binding agent, a solid lubricant and a pore-making agent; the preparation methodof the grinding wheel comprises the following steps that (1) diamond powder, the CBN abrasive, the metal binding agent, the auxiliary abrasive, the ceramic binding agent, the solid lubricant and the pore-making agent are weighed according to the ratio, then a binder is added, mixing and sieving are conducted, and a formed material is obtained; (2) pressing is conducted, specifically, the formed material is evenly put into a mold for being scraped to be flat and then is put into a hydraulic machine for molding hot pressing, and a grinding blank body is obtained after cooling and mold stripping;and then drying, sintering, processing inspection, packaging and warehousing are conducted to obtain a finished product. According to the grinding wheel, the strength, self sharpness and grinding performance of the grinding wheel can be effectively improved, and the cutting stability and cutting efficiency of the grinding wheel are improved accordingly.

Description

technical field [0001] The invention belongs to the technical field of grinding wheel manufacturing, and in particular relates to a special grinding wheel for grinding trains containing a superhard abrasive cermet bond and a preparation method thereof. Background technique [0002] It is well known that steel rail is the basic project of rail transportation, and rails will have defects such as side wear, fatigue and corrugation after long-term use in passenger dedicated lines, passenger and freight lines, heavy-duty railway lines and urban rail lines. At present, the domestic railway engineering department generally adopts large-scale track maintenance and grinding trains for the maintenance of rails. Grinding trains generally work in the field, and the environment is relatively harsh, and the requirements for grinding wheels for grinding trains are relatively strict; at present, the grinding wheels used at home and abroad are ordinary abrasive resin grinding wheels, and the...

AI Technical Summary

Problems solved by technology

Grinding trains generally work in the field, and the environment is relatively harsh, and the requirements for grinding wheels for grinding trains are relatively strict; at present, the grinding wheels used at home and abroad are ordinary abrasive resin grinding wheels, and the corundum powder and fillers produced during the use of traditional grinding wheels Powder and resin are carbonized at high temperature, resulting in smoke and dust and pungent smell, which have a great impact on the surrounding environment of the railway and operators, especially in tunnels, subways and northern winter environments, where the dust and smoke smell are particularly difficult to eliminate

At the same time, due to the limitation of the abrasive hardness and structural strength of the traditional grinding wheel, the grinding quality and grinding efficiency of the train are improved. Especially in today's rapid development of my country's high-speed rail and other rail transit, super-hard abrasives are used to prepare environmentally friendly, high-efficiency, high-quality grinding. Special grinding wheels for trains are particularly urgent