| 摘要 |
PURPOSE:To form an H-shaped tubular body continuously with high efficiency, by rotating a tubular die between blank inserting position and pressing die inserting position. CONSTITUTION:A piston rod 24 is stretched, and a blank 20 is inserted to the left of a through-hole 2 of a die 1. The piston rod 24 is then contracted and the blank 20 on a supply chute 22 is received on a V-block 21. Pressurized oil is supplied to a hydraulic rotating mechanism and a turntable 3 and the die 1 are rotated clockwise. When the die 1 arrives at a pressing die inserting position, the movement of the die 1 is stopped, and the pressurized oil is supplied to the head side of hydraulic cylinders 13L, 13R, and pressing dies 15L, 15R are inserted into the through-hole 2 of the die 1. In this case, piston rods 14L, 14R of cylinders 13L, 13R are stretched synchronously, and the blank 20 is compressed by pressing dies 15L, 15R and flows into a gap between inner wall in the die 1 and outer peripheral faces of dies 15L, 15R. Thus, a tubular body of H-shaped sectional form having a partition wall in the radial direction is formed. |
