DEVICE FOR FORMING PARTS HAVING CURVED GROOVE

摘要

PURPOSE: To provide a forming device for a parts having a curved groove capable of forming the curved groove shape of excellent forming precision. CONSTITUTION: A forming device is provided with an upper punch and a lower punch which are separated from each other by the prescribed distance and opposite to each other, and a die provided with a holding stepped part to hold a billet, and the axis X2 of a projecting part 54 to form a punch shape of the lower punch is displaced to the axis X of a return groove to be originally obtained by the angleθin the direction of the arrow B in advance.