This text for the Disc Cut of Wider and Thick Production Line in the Handan Iron and Steel Group Company example,analyzing the moving curve of steel plate side after cutting and the speed relation in Part side process,and apply the analytic theories result to improvement design of Way out armor plate and to disc cut-part side cut movement speed choice.

Causes analysis of shearing defects of scrap chopper and its countermeasures;

To solve the cutter frequent changing, the guide box of scrap chopper was improved in cold rolling mill of Echeng Iron and Steel Co.