| 摘要 |
PURPOSE:To manufacture a product of different size by one press forming die, by forming a junction part which has overlapped each one part of a set of press steel plates, as one body by lance and bend working, executing press-forming, and subsequently, cutting the lance and bend part, and sliding and coupling the press steel plates. CONSTITUTION:In a state that a press steel plate 11 has been overlapped on a joggled lap of a press steel plate 11' and a junction part 13 has been formed, they are set to that the junction part 13 is positioned on a die 2. Subsequently, a press ram 7 is made to descend, the press steel plates 11, 11' are drawn and formed by a drawing punch 6 and a drawing die 3, and simultaneously, a cut- bent part 14 is formed by a lance and bend punch 8 and a lance and bend die 4, and the steel plates 11, 11' are coupled as one body. Subsequently, the press ram 7 is returned to its initial attitude, the steel plates 11, 11' are taken out of the die 2, the external form is arranged suitably by a punching press, and thereafter, the lance and bend part is cut, coupling of the steel plates 11, 11' is released, and by sliding them relatively, the junction part 13 is coupled by means of welding, etc., and a product of prescribed size is formed. |
