Shaping grinder and manufacturing method thereof

Abstract

The invention relates to the field of friction materials, and discloses a modification grinder and a manufacturing method thereof. The modification grinder comprises 30%-45% of binder, 4%-10% of tirepowder, 20%-25% of friction increasing filler, 10%-25% of modification filler, 14%-20% of reinforcing material and 1%-5% of polytetrafluoroethylene powder. Wherein the binder comprises modified phenolic resin, and the shaping filler comprises tungsten carbide and zirconite. By adding the modification filler and adjusting the proportion of all the components of the grinders, the modification performance of the grinders is improved, polygon generation of the high-speed motor train unit is inhibited, and the turning repair mileage of wheels is increased. Compared with an existing grinder, the profile modification grinder manufactured through the method has the advantages that the service life is prolonged, the weight of the grinder is reduced, and the profile modification rate of the grinderon a polygonal wheel is increased by 10%-30%.

Description

technical field [0001] The invention relates to the field of friction materials, and in particular to a shape-modifying grinding wheel and a manufacturing method thereof. Background technique [0002] With the continuous development of high-speed trains, the number of operating lines continues to increase, and the road conditions of the lines are complex and changeable. After a certain mileage of high-speed train operation, polygonal wear will appear in the wheel circumferential direction. Wheel polygons will intensify the dynamic effect of wheel and rail, resulting in high-frequency wheel-rail impact vibration, resulting in a decrease in passenger comfort, and even damage to the track and vehicle components. The polygonal problem of high-speed train wheels has attracted more and more attention from railway departments and scientific research institutes. [0003] After years of tracking of existing vehicles, it is found that the frequency of wheel polygons in high-speed tra...

AI Technical Summary

Problems solved by technology

However, at present, the shape-modifying abrasives used in high-speed EMUs generally have problems such as excessive wear, metal inlays, and thermal cracks on the friction surface, which greatly shorten the service life of the abrasives and the effect of shape modification.