Since the annealing plate has very strict requirements for flatness, it is necessary to perform stretch and straightening to produce completely flat steel plates. After the steel strip is straightened by the stretching and bending straightening machine, it can achieve good plate shape, eliminate the yield plateau, and improve the mechanical properties of the steel strip. Therefore, using the stretch and straightening unit can complete the correction of three-dimensional plate shape defects (edge wavy and middle cupping) of the strip, and at the same time significantly improve the mechanical properties of the strip. The main forms of stretch and straightening machines include double bending and double straightening, single bending and single straightening, and double bending and single straightening, and different configuration schemes can be selected according to different production processes and raw materials.
