High performance CNC metal CZU purlin frame channel roll C Shape U Shape Z Shape steel framing profile forming machine

            High performance CNC metal CZU purlin frame channel roll C Shape U Shape Z Shape steel framing profile forming machine:The yield point and tensile strength of the metal can be increased by cooling, alloying, heat treatment and combination.For example, one place where a piece of steel wire is repeatedly bent will harden and eventually break, and the reason for breaking is due to repeated bending, called cold working.With each bend, the wire stiffens and its elongation decreases until it can no longer withstand a second bend and the wire breaks.

        A similar phenomenon occurs when metal is formed by cold bending.In order to obtain a plate of a certain size, the strip passes through a series of rollers with decreasing radial spacing.When the cold hardening reaches a certain point, the metal hardens and further rolling produces cracks.