The rolling method which uses the rolling tool shown in Fig. 1 to produce a rolling and wetting action on the surface of the material is called rolling. Its mechanism is to make the surface produce instantaneous high temperature and soften for a short time. After rolling, on the one hand, the peak metal is filled into the trough; on the other hand, the surface is deformed by plastic, which leads to the change of the size and roughness of the part. The rolled surface becomes a shiny mirror.
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