Before bending to V shape, the metal sheet should be slotted with V_shape of a certain depth on the bending line, then the metal sheet is bent to the required shape along the V_slot.

• 形弯曲成形前,对金属薄板折弯处进行一定深度的V形开槽,然后在V形开槽处进行弯制成形,此种加工方法称之为V形开槽弯曲成形技术。