A continuous bar mill (CBM) consists of multiple independent stands that can each apply rolling reduction to a metal bar. There are three main mills within a CBM - the roughing, stretching, and finishing mills - which are identified by decreasing roll diameters and increasing roll hardness. In continuous rolling, the bar volume remains constant while the flow rate varies according to the bar cross-sectional area. Rolling produces elongation, reduction in thickness, and sometimes spread. Proper roll pass design following principles like constant volume and flow is important for efficient shaping of bars.

1. Presented by ANSAR HUSSAIN RIZVI Manager (Production) Roll Pass Designing in Continuous Bar Mill

8. Roll Pass Designing in Continuous Bar Mill Billet Size Area Finished Size Area of finished bar Co-efficient of elongation No. of passes 150 22500 12 113.1429 198.8636 20.78453 150 22500 16 201.1429 111.8608 18.52503 150 22500 20 314.2857 71.59091 16.77243 150 22500 22 380.2857 59.16604 16.02385 150 22500 25 491.0714 45.81818 15.01982 150 22500 28 616 36.52597 14.12972 150 22500 32 804.5714 27.9652 13.08094 150 22500 36 1018.286 22.09596 12.15586 150 22500 40 1257.143 17.89773 11.32834

18. Roll Pass Designing in Continuous Bar Mill

20. Roll Pass Designing in Continuous Bar Mill