| 摘要 |
PURPOSE:To permit the reduction in the size of electrical installations without increasing accelerating power and to improve the accuracy of strip thickness in cold rolling installations by rolling a strip at a specified speed without accelerating or decelerating the speeds of plural rolling mills. CONSTITUTION:In cold rolling installations provided with a welder 3, a looper 5 and a liquid honing machine type descaler 7 for removing the scale from the front and rear surfaces of strips by projecting shot on the inlet side of a cold rolling device 9 consisting of plural rolling mills, the individual rolling mills of the device 9 are operated at a specified rolling speed without acceleration or deceleration after the mills are started. Thus lower max. speeds than in the prior are required and accelerating power is not required. Therefore, the reduction in the size of electrical installations is made possible, and since fluctuations in coeffts. of friction, etc. are decreased, the accuracy in the thickness of strips is improved. |
