A study of product quality of semi-continuous Bar Mill By Differential Dual Drive

Baysed on the investigation of experimental data in the D. D. D semi-continuous bar mill φ250mm×6, the following works have been studied:
1.The accuracy of product has been analyzed statistically.The mechanism of forming a bigger head and tail, and the fluctuation with high frequency in dimension along the product length has been made clear by the method of simulation.
2.The actual tension level between stands is estimated by the current data of D. C motor.
Thus, it is denoted that in order to further improve the product accuracy and rolling process stableness, the free tension control technique should be developed.