Packaging steel strip cold rolling dynamic gauge change profile

Packaging steel strip cold rolling dynamic change specification profile dynamic specification is the continuous cold rolling or pickling Mill online unit indispensable function, hot-rolled coil, when different ( Can be different steel grade, different thickness or width) Continuous in cold rolling line after welding ( At this point to around 300 m/min) When will the rolled into different thickness of cold rolled coil. For process computer setting model, respectively before and after the coil set calculation is not difficult, difficult is how to carry out, by what time sequence by analyzing frame for the roll gap and speed adjustment, made after a wedge is not too long after the transition period to achieve the required to set the thickness after and set the tension and ensure a smooth transition, do not produce large tension fluctuation ( Don't cause broken belt) 。 For a smooth transition, the material value before and after the change implemented in stages, slow transition process control of tension, but wedge transition section and not too long, once the wedge transition section is greater than the distance between the frame makes the transition section at the same time two frame will make the problem more complicated, so in addition to change the set value by stages, the key is to strengthen the comprehensive control of thickness, speed, tension, to speed up the transition ( Reduce unqualified strip length) 。 Dynamic change specifications precise tracking of weld, and after the first frame forming wedge transition section, hold behind each frame to the elongation keep wedge transition section, the key is to control good wedge in the transitional period of starting point location ( And the distance of the weld) And the end position. In wedge transition section through a frame to adjust the speed of the before and after the frame and the frame to make the material tension after the transition to the required value, and keep the front tension for the material before the required set point, and don't make the tension fluctuation in the process of adjustment is too large, it is the key control requirements. So dynamic change specifications L2 and L1 collaborative cooperation and timely switch AGC, ATC ( Tension control) A closed-loop feedback control functions.