To form a projecting part with which positioning in a plurality of directions is performed on the surface of a workpiece by press working without generating holes and recessed parts on the back surface of the workpiece.
The workpiece W is received and supported with a die 8 having a flat workpiece supporting surface and the workpiece W is pressed down to the die 8 with a blank holder 5 given the force of a lifter spring 4. In this condition, a formed recessed part is produced on the surface of the workpiece by pressurizing the workpiece with a punch part 3a and, at this time, a part of the plastically deformed workpiece is protruded in a guide hole 6 in the top of the punch which is provided on the blank holder. By forming that protruding part inside the guide hole 6, the projecting part which is usable for positioning is produced on the surface of the workpiece.
| JP3662686 | PUNCHER |
| WO/2022/248398 | EMBOSSING DIE FOR A STAMPING TOOL |
| WO/2022/092952 | VACUUM ADIABATIC BODY |
TAKAHASHI SHINJI
Higashio Masahiro
Torii Kazuhisa