Type and structure of rolls
Roll is the main part of rolling mill. According to the type of rolling mill can be divided into plate mill roll and shape mill roll two categories.
The roll body of plate mill is cylindrical. Sometimes, the roll body of hot rolled sheet roll is slightly concave. The roll body of the cold rolled sheet roll is slightly protruding. There is a groove on the roll body of the profile mill.
More than 400 mm cold rolling roll diameter, after forging, mostly in the center bore of a ¢hole of 70-250 ¢. In this way, on the one hand, the internal stress distribution of the roller can be uniform after heat treatment; on the other hand, when the roller surface is hardened, the water can be cooled inside the roller and the quenching effect can be improved.