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This article describes the roll forming characteristics of the product , an overview of the development of the domestic and international cold-formed steel , cold-formed steel in the automotive industry and its roll forming several new technology , that is forming unit forming roller centralized regulation and flexible roll forming unit , and once again deep processing of cold-formed steel technology development is briefly described . In this paper, a variety of cold-formed steel roll forming process , and to determine the length of the deformation zone in the roll forming process , the critical bending angle and forming pass metal pressure distribution , qualitative analysis to determine the bending angle of the need to consider conditions and various factors affecting the critical bend radius , and the typical parts to automotive equilateral channel process analysis, using leaflets non- continuous mode of production , sentinel adjustable molding method to calculate the sectional size of each transition , the use of secondary anti - bending principle to determine the molding system , designed to pass each pass of the processing of the channel .
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