| 摘要 |
<p>PURPOSE: To improve the quality and yield of the product by specifying the position of the welding point using the number of a tension reel on the coiling side in the reversible rolling to determine the correct automatic deceleration position. CONSTITUTION: In the reversible rolling, when the welding point is detected by a welding point detector 8 in the first pass, a deceleration position control device 11 measures the length of a coil 5A coiled by a left tension reel 4 using a left number of rotation detector 10, and the number of rotation N1 is stored as the position of the welding point At the rolling starting point on the second pass, the deceleration position control device 11 stores the number of rotation N2 of the left number of rotation detector 10, and the rolling is achieved from this number of rotation N2 to the reduced number of rotation N1 at the coiling operation. The automatic deceleration is started when the number of rotation approaches N1 . Then, the welding point is rolled at slower speed. This step is repeated to correctly achieve the automatic deceleration at the position of the welding point.</p> |
