| 摘要 |
PURPOSE:To produce a light-gage steel strip having a good surface shape with safety and good efficiency by crushing and thinning the weld zone thereof right after superposing and welding the ends of the light-gage steel strips, applying temper rolling load thereon and subjecting the weld zone to the temper rolling as well. CONSTITUTION:The light-gage steel strip 3 fed from a steel strip coil 1 after annealing is passed through a welding machine 4, where the ends of the preceding and succeeding strips are held superposed and welded by upper and lower electrode wheels 7, 8 for welding while the electrodes are rolled down and moved in the transverse direction of the strip. Upper and lower rolls 11, 12 for crushing and thinning having a small diameter are moved transversely in synchronization with the transverse movement of wheels 7, 8 to crush and roll the superposed weld zone which are still extremely hot thereby decreasing the thickness of the weld zone. The strip is then passed through a temper rolling mill 16 to temper roll the weld zone which is held applied with the temper rolling load. The strip is trimmed of its side edges with a side trimmer 17 and is thereafter passed through an oil coated 18 and a splitting shear 19 and is coiled on a tension reel 20. |
