The redrawing of oval shells for the use of a connector part

Abstract Oval-shell parts have been widely used in consumer electronics such as the receptacle of the lightning connector. The current stamped part, based on the design of rectangular redrawing, exhibits uneven distribution of wall thickness and cannot meet the required tolerance. The wall thickness tends to be smaller near the entrance of the flat wall than that of the semi-cylindrical wall while it tends to be larger near the bottom of the flat wall than that of the semi-cylindrical wall. This paper proposes an elliptical scheme for the redrawing of oval shells for the progressive stamping process. The variation of the wall thickness between the flat wall and the semi-cylindrical wall has been improved.