A Composite Processing Method for Roller Bearing Inner Ring

Abstract

The invention relates to a composite machining method for an inner ring of a roller bearing, which comprises the following steps: step 1, machining the inner ring of the roller bearing to enable the diameter of the inner ring of the roller bearing to be smaller than a design size by 0.15 mm-0.25 mm; step 2, conducting strengthening grinding machining on the inner ring of the roller bearing; step 3, after the inner ring of the roller bearing is machined to the set size, cleaning the inner ring of the roller bearing for several times; and step 4, using a drum belt with micro bosses on a roller press to roll around on the inner ring of the roller bearing for one time. In the step 2, the inner ring of the roller bearing is subjected to strengthening grinding machining by a strengthening grinding machine with grinding materials and through strengthening grinding gas; the grinding materials are prepared by mixing grinding liquid, grinding power and bearing steel shots; and the grinding powder is brown fused alumina, wherein the diameters of the bearing steel shots are 2 mm, and the mass ratio of the brown fused alumina to the bearing steel shots is 3:7-1:4. The machining method can machine surface texture on the inner ring of the roller bearing and form a nitrogen-rich chemical physical film layer, and belongs to the technical field of machining methods of inner rings of roller bearings.

Description

technical field [0001] The invention relates to the technical field of processing methods for inner rings of roller bearings, in particular to a composite processing method for inner rings of roller bearings. Background technique [0002] Bearings are the core components of mechanical equipment, and the design of bearings is particularly important, which directly affects the performance and service life of bearings. Among them, roller bearings are widely used in high-speed rail, mining machinery, textile machinery, steel, ships, etc. The existing roller bearing raceway is too smooth and does not have a good oil storage function, resulting in poor lubrication effect. The hardness of the bearing surface has a great impact on the bearing life. When the roller bearing is working, the rollers will slip and scratch the raceway. Since the roller bearing needs to work in some water or corrosive media, it puts forward very high requirements for its corrosion resistance, especially ...

AI Technical Summary

Problems solved by technology

The existing roller bearing raceway is too smooth and does not have a good oil storage function, resulting in poor lubrication effect

The hardness of the bearing surface has a great impact on the bearing life. When the roller bearing is working, the roller will slip and scratch the raceway

Since the roller bearing needs to work in some water or corrosive media, it puts forward very high requirements for its corrosion resistance, especially the abrasive particles produced by the roller bearing during work, and the roller bearing has no place to accommodate the abrasive particles. , causing "three-body wear" to occur, increasing energy consumption and accelerating the wear of roller bearings

The temperature of the bearing will rise during operation, which will accelerate the corrosion of the inner ring of the bearing

However, a single intensive grinding process cannot form the required texture on the inner ring

A single rolling process can easily cause the bearing surface to fall off, and the hardness does not increase significantly, nor can a nitrogen-rich chemical physical film layer be formed on the bearing surface

In the existing technology, the hardness of the inner ring of the roller bearing, corrosion resistance, lubrication effect, cooling effect, etc. have certain limitations.

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