针对1200叠轧薄板轧机机架断裂问题,重钢四厂于1977年改造了1200叠轧薄板轧机的机架。经过8年的生产实践,证明这项改造切实可行。 一、改造前,机架裂纹情况及分析 重钢四厂1200叠轧薄板轧机设计最大轧制压力为1365t。机架形状及主要结构尺寸见图1。机架材质为35号铸钢。轧机在使用 In response to the frame breakage of the 1200-stacked plate mill, the No. 4 Plant of Chongqing Iron and Steel Co., Ltd. rebuilt the frame of the 1200-stacked plate mill in 1977. After eight years of production practice, this transformation proved viable. First, the transformation before the case of cracks and analysis of heavy steel plant four plant 1200 rolling plate rolling mill design maximum rolling pressure of 1365t. Rack shape and the main structure size shown in Figure 1. Frame made of 35 cast steel. Mill in use