| 摘要 |
PURPOSE:To straighten buckled part of a can body generated in cylinder forming process and improve efficiency of seam welding by adding can straightening rollers to a roller type straightening machine of a skew roll type cylindrical can longitudinal seam automatic seam welding machine. CONSTITUTION:When seam welding a large diameter thick drum can from a small diameter thin pail can, buckled points (a), (b) are generated at the starting part of cylindrical forming in pretreatment process of longitudinal seam welding of the cylindrical can body. to straighten this by a roller type straightening machine, inclination is given to face the centerline in the direction of progress of welding to thrust the end face of the pail can 1' or drum can 2' against the end face of a Z-shaped bar 9 by upper skew rolls 3, 4, and lower skew rolls 5, 6. A roller 10 for can correcting is provided near a buckled part outside of the skew rolls 5, 6. Unstabilizing of lap control of skew rolls due to the weight of can body and thermal distortion is prevented by this, and efficiency of welding work of cans is also improved. |
