| 摘要 |
PURPOSE:To decrease the man-hour, and to reduce a material loss, by simultaneosly forming two large and small disks by a plate material at the first press position, and subsequently, executing the drawing, etc. at the second press position in a state that the punched plate remains held in the hole. CONSTITUTION:A metallic plate material 11 is fed intermittently in the direction A, a positioning hole 12 is formed at the first stage press position P1, and also a circular hole 13 and small holes 14, 15 are formed. Subsequently, at the first press position P2, two large and small circular holes 16, 17 are punched concentrically with the circular hole 13, and two large and small punched plates 18, 19 are formed. In a state that the punched plates 18, 19 exist in the holes 16, 17, they are fed to a stop position Ps, also are fed to the second press position P3, drawing is executed to the two large and small punched plates 18, 19, and supporting rings 41, 42 are manufactured. In this regard, at the following press position P4, the plate material 11 is cut finely as scraps. |
