Manufacture of a reinforcing rod for concrete - with high ribs from hot rolled round steel

摘要

The roughing mill has two shaping rollers, working together, each of which is held by a supporting roller, with a diameter three times that of the shaping rollers. The round steel i shaped to a regular polygon, with a number of edges, dividable by two. It is pre-hardened, and has half as many ribs as edges, and is then rolled.