In bearing industry, the traditional turning molding technology is using a special lathe, the focus on process method is used to complete forming. But the method uses the equipment adjustment is difficult, machine tool low accuracy, low material utilization ratio, so the process methods are being phased out.

With the development of science and technology, the numerical control turning machine a rapid development and more perfect. At present, some complex shape, the product with high accuracy is used more and more the numerical control turning forming technology.

The raw materials for manufacturing rings cylindrical bar stock or pipe material, at present according to different molding process, rolling bearing collar is generally has the following kinds of manufacturing process.

A, bar materials, pipe material) material- cold rolling material molding-heat treatment quenching and tempering-grinding-parts inspection-diamagnetism, cleaning-submits assembly

B, pipe material) material-turning molding-heat treatment quenching and tempering-grinding-parts inspection-diamagnetism, cleaning-submit assembly

C, bar stock) material-cold (temperature) extrusion-turning-heat treatment quenching and tempering-grinding-parts inspection-diamagnetism, cleaning-submit assembly

D, bar stock) material - forging-annealing (or fire-turning (cold rolling forming)-heat treatment quenching and tempering-grinding-parts inspection-diamagnetism, their cleaning-submit assembly



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