| 摘要 |
PURPOSE:To prevent the flexure of a plate by providing two twisting processes in opposite directions on a line and bending a metal thin plate in both processes without constraining it. CONSTITUTION:A metal thin plate 19 fed in a horizontal attitude is twisted by 90 deg. by being sent through the first vertical roller 34 having a height position different from that of a roller 33 and displaced from the feed line on one side in the width direction of the metal thin plate 19, it is sent to the machining region through the second vertical roller 35 having the same height position as that of the first vertical roller 34 on the feed line, and after machining, it is twisted by 90 deg. in the opposite direction by being sent through the third and fourth vertical rollers 36, 55 and the second horizontal roller 56 in sequence on the contrary to the said process. Accordingly, the flexure of the metal thin plate such as wrinkles can be prevented by not constraining the metal thin plate. |
