Breakage mechanism and application of the bottom main drive spindle in a R2 roughing mill during hot rolling by finite element analysis;

The screwdown system of four-roll reversing roughing mill in Tiangang Group requires high control precision, the speed control of screwdown motor is the key factor.

In hot rolling process,reheating furnace and roughing mill are controlled separately in general,and as a subsequent equipment of reheating furnace,roughing mill can not feed useful rolling information back to reheating furnace in time,so that reheating furnace can not heat slabs according to the requirement of roughing mill.

The necessity and reality for on line operating condition monitoring of rough rolling mill is analyzed.

Breakdowns analysis in roughing mills at No.6 rolling mill of SISC;

Discussion on pass system of roughing mills of continuous bar or wire-rod mill;

The processing schemes of roughing mills reformation of hot narrow strip plant were put forwardThe selection principles of reformation were introducedMeanwhile,some problems about reformation design and the development direction of hot narrow strip were put forward