Technique for processing bearing ring by steel tube hot-rolling and precise cold-rolling

Abstract

A technique for processing a bearing ring by steel tube hot-rolling and precise cold-rolling has the advantages that the processing flow is short, the use is convenient, the operation is fast, labor, time and materials are saved, the utilization rate of processing materials is up to more than 95, a lot of time and energy is saved, the product quality is improved remarkably, the working efficiency is increased by more than 200%, and the labor intensity is reduced. The technique comprises the following processing steps in sequence: first, conducting the steel tube hot-rolling procedure to process and form a hot-rolled steel tube; then conducting the bearing ring cold-rolling forming procedure to make the hot-rolled steel tube used for processing the bearing ring into a bearing ring blank which is uniform in size and meets the processing standard of the bearing ring, wherein both the inner diameter and the outer diameter of the bearing ring blank are 20-35% smaller than that of a finished bearing ring to be processed; placing the bearing ring blank in a precise cold-rolling forming machine, powering the bearing ring blank to rotate at a normal temperature, enlarging and deforming the bearing ring blank in the rotating process, and conducting cold-rolling forming processing to obtain the finished bearing ring in a target size.

Description

technical field [0001] This patent relates to a process method for bearing rings, especially a process method for processing bearing rings with hot-rolled steel pipes and precision cold rolling. Background technique [0002] In the existing bearing ring processing technology, there are usually two processing methods: one is to use a bearing forging with a certain processing flow larger than the finished ring, and use a special bearing ring lathe to process multiple processes in sequence. into the desired ferrule. This processing method is simple and specialized in each process, but requires a large number of equipment. Generally, a ferrule requires 14 processes. From bearing forgings to turning into bearing rings, generally the iron filings removed by turning account for 30-40% of the total weight. Therefore, the traditional turning process not only has many procedures and long processing time, but also consumes a lot of raw materials, and the material utilization rate is ...

AI Technical Summary

Problems solved by technology

Therefore, the traditional car processing technology not only has many procedures and long processing time, but also consumes a lot of raw materials, and the material utilization rate is only about 45%.

The other is the processing method of cold rolling forming. At present, the bearing ring is processed by cold rolling forming. The most common way of blank is still forging. This method saves 10% compared with the traditional turning method- 20% of the material, but because of the large flow of forgings, rough turning and finishing turning are required, and there are many processes

Although the material utilization rate is improved, it is not the best process route

In addition, cold-drawn or cold-rolled steel pipes are used as materials for cold rolling, but because of the processing technology of cold-drawn or cold-rolled steel pipes, a small amount of scratches or small cracks appear on the surface of the steel pipes. During cold rolling, as the workpiece increases, scratches or small cracks will be further enlarged or even broken, so this material is not suitable for cold rolling forming.

[0003] In short, the existing bearing ring processing technology is complex, labor-intensive, time-consuming, waste, consume a lot of time and energy, product quality and work efficiency are low, labor intensity is high, affect the further development and application of bearing rings, and it is difficult to meet the needs of the market. and user needs

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