Abstract: A stamping method to form a metallic part and associated metallic part, wherein the geometry of the metallic part is such that some areas need to deform in antagonistic directions during stamping. The stamping method includes the step of providing a flexible metallic blank including at least two sub-blanks corresponding to sub-parts of the metallic part, the flexible blanks further including an overlapping area in which the blanks are overlapped onto one another, the overlapping area corresponding to the critical transition area between the two sub-parts, the overlapping area including a pre-assembly area and a sliding area. The punch used for the stamping operation includes a gap in between the area of the punch corresponding to the first and second sub-parts.

Abstract: A stamping method to form a metallic part and associated metallic part, wherein the geometry of the metallic part is such that some areas need to deform in antagonistic directions during stamping. The stamping method includes the step of providing a flexible metallic blank including at least two sub-blanks corresponding to sub-parts of the metallic part, the flexible blanks further including an overlapping area in which the blanks are overlapped onto one another, the overlapping area corresponding to the critical transition area between the two sub-parts, the overlapping area including a fixed pre-assembly area and a sliding area. The punch used for the stamping operation includes a gap in between the area of the punch corresponding to the first and second sub-parts.

Abstract: A press-forming device has a punch (2), a die (7) which relatively moves with respect to the punch (2), a strain amount measuring means (8) which is provided inside a member to be controlled and measures a strain amount of the aforesaid member to be controlled which occurs in accordance with press-forming, when at least one of the punch (2) and the die (7) is made the aforesaid member to be controlled, and a strain amount control means (9) which is provided in the aforesaid member to be controlled and controls the strain amount of the aforesaid member to be controlled which occurs in accordance with press-forming. The strain amount control means (9) controls a drive amount of the aforesaid member to be controlled so that the strain amount measured by the strain amount measuring means (8) is in a predetermined range during forming. Thereby, reduction in a surface strain, improvement in shape fixability or the like of a press formed product can be achieved.

Abstract: A press-forming device has a punch (2), a die (7) which relatively moves with respect to the punch (2), a strain amount measuring means (8) which is provided inside a member to be controlled and measures a strain amount of the aforesaid member to be controlled which occurs in accordance with press-forming, when at least one of the punch (2) and the die (7) is made the aforesaid member to be controlled, and a strain amount control means (9) which is provided in the aforesaid member to be controlled and controls the strain amount of the aforesaid member to be controlled which occurs in accordance with press-forming. The strain amount control means (9) controls a drive amount of the aforesaid member to be controlled so that the strain amount measured by the strain amount measuring means (8) is in a predetermined range during forming. Thereby, reduction in a surface strain, improvement in shape fixability or the like of a press formed product can be achieved.