| 摘要 |
PURPOSE:To maintain the work hardening of a backing strip low, by setting the peripheral speed of the work roll on the backing strip side higher than the peripheral speed of the work roll on an alloy strip side and press welding both strips to each other. CONSTITUTION:A backing strip 2 and an alloy strip 4 drawn out from supply reels 1, 3 are superposed on each other and are passed between a pair of upper, lower work rolls 5, 6, and are thereby press welded to a composite material 7 which is taken up on a take-up reel 8. In this case, the diameter of the roll 6 on the strip 2 side is set larger than that of the roll 5 on the strip 4 side and both rolls are driven forcibly in mutually opposite directions at the same number of revolutions by means of the same driving source 9. Thus, the peripheral speeds of the rolls 5, 6 are changed and the roll 5 is brought into press contact with the roll 6 by a backup roll 10. |
