翻边：使毛坯的平面或者曲面部分的边缘沿一定曲线竖立直边
Stamping process terminology (6)
Shaping: a stamping process in which the shape and size of the working parts are changed a little depending on the material flow to ensure the accuracy of the work piece.
Back pressure: it is a kind of stamping process that the former project is raised to the required size of the product to eliminate the internal stress of the process parts and improve the flatness of the process parts.
Flanging: to make the edge of a flat or curved part of a work piece erect a straight edge along a certain curve
