| 摘要 |
PURPOSE:To improve the operating efficiency and the quality of products by blowing a high-pressure fluid of specific pressure upon a roll surface for a time set based on the expression for the purpose of removing foreign matters stuck onto the roll surface. CONSTITUTION:In temper rolling, the plated skin of the most upper surface of a steel sheet is stripped off, and the produced zinc powder wears rolls 2, 3 and degrades the quality of products. These foreign matters 6 produced on the roll surface are removed by blowing a high-pressure fluid produced by a high-pressure fluid generating device 5 upon the surface of work roll 2. At that time, the fluid pressure is regulated to >=500kg/cm<2>, and the blowing time is set based on the equation in accordance with the surface roughness of roll. By this method, the operating efficiency is improved by improving the durability of roll and reducing the frequency of roll exchanges, and the product quality is improved with the stabilization of the surface roughness of roll. |
