Patent ID: 11884331
Assignee: HONDA MOTOR CO., LTD.
Field: Materials, metallurgy (Chemistry)
Classification: CPC B  C | IPC B  C

Claim 0:
1. A center pillar manufacturing method of a vehicle provided with a stiffener having a substantially W-shaped cross-section formed from a crest portion and a pair of trough portions provided on two sides of the crest portion, the method comprising:
a first step of stacking a primary steel plate and a secondary steel plate extending across the crest portion of the primary steel plate and having a shorter length than a length between bottom surfaces of the trough portions, and temporarily joining the primary
steel plate to the secondary steel plate;
a second step of forming the stiffener by press-molding and quenching the primary steel plate substantially into a W-shape and press-molding and quenching the secondary steel plate substantially into a U-shape, wherein the crest portion is formed from a lower end portion to an upper end portion of the stiffener, the pair of trough portions are formed from a heightwise intermediate portion to the upper end portion of the stiffener, and the secondary steel plate extends to a front wall portion and to a rear wall portion of the stiffener at a portion below the heightwise intermediate portion of the stiffener;
a third step of joining a flange portion of a pillar outer member having an outer wall portion in a vehicle width direction of the center pillar to a flange portion of the stiffener, wherein the front wall portion and the rear wall portion of the stiffener are respectively opposed to a front wall portion and a rear wall portion of the pillar outer member;
a fourth step of joining a pillar inner member having an inner wall portion in the vehicle width direction of the center pillar to the pillar outer member after joining the stiffener in such a way as to sandwich the flange portion of the stiffener with a flange portion of the pillar inner member and the flange portion of the pillar outer member; and
a fifth step of attaching an in-vehicle component to the secondary steel plate, to be executed between the second step and the third step or between the third step and the fourth step.