Method of manufacturing vehicle pillar and press forming die

A method of manufacturing a vehicle pillar including:

• an upper pillar portion that is coupled to a roof rail, when the vehicle pillar is assembled to a vehicle body;
• a lower pillar portion that is coupled to a side sill, when the vehicle pillar is assembled to the vehicle body;
• and a center pillar portion that connects the upper pillar portion and the lower pillar portion, and extends in a height direction of the vehicle body, the method comprising:
• a blanking for obtaining a work piece by cutting a material;
• a drawing for obtaining an intermediate product by forming the work piece, using an upper die that includes a die and a pair of pressing pads, and a lower die that includes a punch and a pair of blank holders;
• and
• a trimming for removing an unnecessary portion of the intermediate product;
• wherein
• in the drawing, both ends of the work piece in a longer side direction are clamped between the pressing pads and the punch,
• then, both ends of the work piece in a shorter side direction are clamped between the blank holders and the die, and
• a center portion of the work piece is clamped between the die and the punch to form the work piece, while the clamping performed by the pressing pads and the punch, and the clamping performed by the blank holders and the die are maintained.