Minimum Tension Control In Rolling Mill

Tolerance is the allowable difference in maximum minimum dimensions with respect to nominal dimensions.

Minimum tension control in rolling mill. The aim of the tension control in the mill is to control the stands speed and to maintain the stable and low tension conditions. Rolling force decreases with the increase of interstand tension while the tension torque increases with the increase of back tension and decreases with the increase of front tension. Looper and tension control shown in fig. F t t r t m 3 where t r is the output torque of motor in tension free rolling.

The error of motor torque in the k th sample is as follows. No matter if you have one strand or two we have the solution for controlling your mill. Changing roll velocity stabilizes the interstand tension. Roundness is defined as the difference between maximum diameter and minimum diameter.

During production the loop and tension control automatically adjust the r factor ensuring minimum material stress between the stands. A non linear state space process model which represents the mill dynamics has been developed and a control scheme is proposed which incorporates an extended kalman filter for estimation of bar tension and optimal state feedback to provide appropriate control action. Control target of minimum tension control the definition is as follows. This parameter directly related to rolling fundamentals simplifies the setup and operator control.

Cobble grooves mill speed motor roll gap rolling mill rolls tension control yield. Interstand tension should be maintained at acceptable levels. Tension control is one of the most important process parameters in tandem cold mill tcm. T m is the output torque of motor in minimum tension.