Minimum Tension Control In Rolling Mill

Control target of minimum tension control the definition is as follows.

Minimum tension control in rolling mill.

No matter if you have one strand or two we have the solution for controlling your mill. Tension control is one of the most important process parameters in tandem cold mill tcm. F t t r t m 3 where t r is the output torque of motor in tension free rolling. Cobble grooves mill speed motor roll gap rolling mill rolls tension control yield.

Tolerance is the allowable difference in maximum minimum dimensions with respect to nominal dimensions. δt k t m k t r f t 4. This parameter directly related to rolling fundamentals simplifies the setup and operator control. The aim of the tension control in the mill is to control the stands speed and to maintain the stable and low tension conditions.

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. Interstand tension should be maintained at acceptable levels. Changing roll velocity stabilizes the interstand tension. During production the loop and tension control automatically adjust the r factor ensuring minimum material stress between the stands.

T m is the output torque of motor in minimum tension. Looper and tension control shown in fig. 2 is important in hot strip mills because they affect both the dimensional quality and the mass flow of a strip the high strip tension between stands induces width shrinkage thickness reduction and moreover can produce an edge wave on a strip. Roundness is defined as the difference between maximum diameter and minimum diameter.