A method for manufacturing a power pin of a power interface is provided. The method may includes the steps of: providing a pin workblank, wherein the pin workblank includes a first surface and a second surface adjacent to each other; performing a fine blanking process for the first surface in a predetermined blanking direction, while burrs forming on the second surface; and adjusting a position of the pin workblank, performing another fine blanking process for the second surface in the predetermined blanking direction, to form a power pin of the power interface and to omit a process of removing the burrs on the second surface. Before the step of adjusting a position of the pin workblank, the method further includes a step of forming a chamfer or a round fillet at an edge of the second surface adjacent to the first surface of the pin workblank.

A punch according to some embodiments of the disclosure includes a body having a punching edge and a wall forming a passageway therethrough, the wall having a multi-start thread formed thereon, and a draw stud according to some embodiments of the disclosure includes an elongated cylinder having a multi-start thread thereon which is configured to be coupled to the multi-start thread of the punch. The number of starts provided on the punch corresponds to the number of starts provided on the draw stud. The multi-start thread on the punch is engaged with the multi-start thread on the draw stud in use. A method using same to punch a hole in sheet metal is also provided.

A manufacturing device manufactures a component having a hat-shaped section as a pad and a punch sandwiching a center portion of a metal plate, and a die and a holder sandwiching both side portions of the metal plate are moved relative to each other in the upper-lower direction. The manufacturing device includes the die, the pad provided inside an opening of the die so that the pad is able to move relative to the die, the punch arranged to face the pad in the upper-lower direction, the holder arranged around the punch so as to face the die in the upper-lower direction and be able to move downwardly, and a locking block provided on the holder. The locking block is moved from a non-facing position to a facing position and inserted between the pad and the holder after mold closing and before mold opening.

A manufacturing device manufactures a component having a hat-shaped section as a pad and a punch sandwiching a center portion of a metal plate, and a die and a holder sandwiching both side portions of the metal plate are moved relative to each other in the upper-lower direction. The manufacturing device includes the die, the pad provided inside an opening of the die so that the pad is able to move relative to the die, the punch arranged to face the pad in the upper-lower direction, the holder arranged around the punch so as to face the die in the upper-lower direction and be able to move downwardly, and a locking block provided on the holder. The locking block is moved from a non-facing position to a facing position and inserted between the pad and the holder after mold closing and before mold opening.

A press working method capable of forming a perforated portion with higher accuracy with respect to a workpiece being a ductile material. The press working method may comprise applying a first load to a workpiece being a ductile material with a press member to apply a preload within an elastic region of the workpiece, and then applying a second load exceeding the first load to the workpiece with the press member to provide a perforated portion in the workpiece, wherein the elastic region is larger than 0 MPa and is equal to or less than a limit shear stress value at which the workpiece is elastically deformed, the workpiece is a pipe made of metal, and the first load and the second load are applied in a state where an inside of the pipe is hollow.

A press working method capable of forming a perforated portion with higher accuracy with respect to a workpiece being a ductile material. The press working method may comprise applying a first load to a workpiece being a ductile material with a press member to apply a preload within an elastic region of the workpiece, and then applying a second load exceeding the first load to the workpiece with the press member to provide a perforated portion in the workpiece, wherein the elastic region is larger than 0 MPa and is equal to or less than a limit shear stress value at which the workpiece is elastically deformed, the workpiece is a pipe made of metal, and the first load and the second load are applied in a state where an inside of the pipe is hollow.

A lock jamb punching tool includes a face member having a die aperture, a rabbet member protruding normal to the face member, a jamb area between the rabbet member and the face member, and a punch in the jamb area, the punch being slidable into the die aperture along a punch path, and an actuator to move the punch along the punch path.

A lock jamb punching tool includes a face member having a die aperture, a rabbet member protruding normal to the face member, a jamb area between the rabbet member and the face member, and a punch in the jamb area, the punch being slidable into the die aperture along a punch path, and an actuator to move the punch along the punch path.

A pressing portion (11) formed in a tapered conical shape pushes away a metallic material of a to-be-opened portion (5) radially outward from the radial center. A portion pushed away (2b) is work-hardened (base-material-hardened) and a density of the plate material (2) increases as compared to that of the other portion of the plate material (2). A radial dimension (c2) of a work-hardened portion at a peripheral edge of the to-be-opened portion (5) is larger than a radial dimension (c1) of the pressing portion (11) (c1<c2).

A pressing portion (11) formed in a tapered conical shape pushes away a metallic material of a to-be-opened portion (5) radially outward from the radial center. A portion pushed away (2b) is work-hardened (base-material-hardened) and a density of the plate material (2) increases as compared to that of the other portion of the plate material (2). A radial dimension (c2) of a work-hardened portion at a peripheral edge of the to-be-opened portion (5) is larger than a radial dimension (c1) of the pressing portion (11) (c1<c2).