BENDING-FORMING APPARATUS OF SHEET AND BENDING-FORMING METHOD

摘要

PROBLEM TO BE SOLVED: To provide a bending-forming apparatus which enables precise bending of a high strength steel sheet being a stock to a prescribed U shape by enhancing adhesion of the steel sheet and a punch during bending (U bending) by a U press when manufacturing a UOE steel tube of high strength.;SOLUTION: When the steel sheet 11 touches a pushing part 33, the bending moment Ma received from the reaction force F_A acting on the pushing part 33 is made to be larger than the bending moment MA received from the reaction force F_B acting on a support part 34.;COPYRIGHT: (C)2009,JPO&INPIT