Composite material grinding roller and manufacturing method thereof

Abstract

The invention relates to a composite material grinding roller and a manufacturing method thereof. The composite material grinding roller comprises a metal roller body and a plurality of wave-shaped composite bodies, wherein the wave-shaped composite bodies are embedded into a working plane of the metal roller body at equal intervals, are integrated with the metal roller body and are wave-shaped ceramic reinforcements or wave-shaped structural bodies composited from wave-shaped ceramic reinforcements and a metal substrate; the wave-shaped ceramic reinforcements are prepared by curing ceramic particles. The manufacturing method of the composite material grinding roller comprises the following steps: firstly designing and manufacturing the wave-shaped composite bodies of required sizes; then carrying out casting forming; and finally, cooling and processing, so as to obtain the composite material grinding roller. By virtue of design of the wave-shaped ceramic reinforcements, the composite material grinding roller has the structural characteristics that the ceramic reinforcements are easily and orderly arrayed in a mold cavity and are applicable to mechanical operation; the displacement and the malposition of each individual ceramic reinforcement in a casting process are effectively avoided; the whole displacement of the ceramic reinforcements in a working condition use process is avoided, and particularly, the composite material grinding roller is a secondarily poured large-sized composite material grinding roller.

Description

technical field [0001] The invention relates to the technical field of main wearable parts of a vertical mill, in particular to a composite material grinding roller and a manufacturing method thereof. Background technique [0002] Vertical mill is a kind of grinding equipment widely used in cement, electric power, coal, chemical industry and other industries, and has a development history of nearly a hundred years. The vertical mill is mainly composed of grinding rollers, grinding discs, separators, pressurizing devices, reducers, motors, housings and other parts. The materials are ground by the principle of rolling. During operation, the grinding rollers move on the grinding discs along a horizontal circular track. , Through the vertical pressure applied on the grinding roller from the outside, the material on the grinding disc is crushed by extrusion and shearing. Grinding rollers made of traditional single materials such as high-chromium cast iron have fast wear, high co...

AI Technical Summary

Problems solved by technology

Grinding rollers made of traditional single materials such as high-chromium cast iron have fast wear, high consumption, high brittleness, and poor safety, which has become a common technical problem in the development of domestic and foreign industries.

[0003] The Chinese patent with the notification number CN1044574C discloses a centrifugal composite wear-resistant grinding roller and its production method. The method is to composite cast wear-resistant alloy cast iron (as the outer layer) and ordinary cast iron (as the core layer), and the outer working surface Good wear resistance, good toughness of the inner assembly surface, can solve the problem of high brittleness of a single wear-resistant material and cracking during work, but the working surface is still cast iron material, which solves safety hazards but does not actually improve material performance and products service life

[0004] The Chinese patent with the notification number CN202015631U discloses a ceramic composite grinding roller for a medium-speed coal mill. Combined with bolt riveting, in order to improve the wear resistance of the high chromium alloy plate on the working surface, a through hole is set on the high chromium alloy plate, and the ceramic rod is embedded into the high chromium alloy plate with a binder. This method produces There are many hidden dangers in the grinding roller: 1. The ceramic rod is easy to be brittle; 2. The ceramic rod and the high-chromium alloy are bonded with an adhesive. The ceramic rods protrude. Under the combined action of huge compressive stress, shear stress and centrifugal force, the adhesive force of the adhesive is difficult to ensure that each ceramic rod can be continuously and firmly bonded.

[0005] Although there are many examples of producing composite wear-resistant parts, there are not many practical and effective methods for large-scale application, and it is still necessary to further improve the wear resistance of these wear-resistant parts

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