MANUFACTURE OF STRUCTURAL MEMBER FOR CARBODY

摘要

PROBLEM TO BE SOLVED: To provide a manufacturing method of the structural member for the carbodies by which the number of manufacturing processes is greatly reduced, the cost of equipment for which is inexpensive and which is excellent in productivity.;SOLUTION: In this manufacturing method of the structural member for the carbodies, by applying fluid pressure P inside a base stock in a state where the long-size cylindrical base stock 14 having an approximately elliptic cross-sectional shape is held inside bulging dies 17, 18, the wall surface of the base stock is bulged and formed by bulging, the member 19 having a rectangular cross-sectional shape is obtained. The movable direction of the bulging die 17 is made to approximately coincide with the direction of a long side of the approximately elliptic cross-sectional shape of the base stock 14.;COPYRIGHT: (C)2000,JPO