Coiling Tension Control System Design And Application Of 500mm Sendzimir Cold Rolling Mill

In response to our country in the automotive, rail transportation and other areas of high-strength spring steel precision long-term dependence on imports.High-strength precision cold-rolled strip steel production use of a reversible Sendzimir rolling mill, which is one of the coiler tension control to ensure high-precision strip shape and gauge indicators important factor. In this paper, a steel mill in Zhejiang 500 mm high strength steel Sendzimir Electric System project, designed and developed a high-performance Sendzimir mill coiling tension control system and on-site commissioning.First, the analysis of Sendzimir mill coiler production process based on direct and indirect tension tension tension between two control methods were analyzed and compared, combined with 500 mm Sendzimir rolling mill coiling tension control requirements, the system uses the largest transfer moment method indirect tension control. In order to improve the steady-state tension control precision designed roll having a diameter of anti-interference function of real-time measurement method.Secondly, the device structure 500 mm Sendzimir mill and tension control system required to determine the use of more powerful, more accurate SINAMICS 6RA80. the principle of control means. Speed and constant tension constant power speed control system stability and a smooth transition within the field weakening speed range is analyzed to provide a basis for application debugging indirect tension control.Finally, the realization of 500 mm Sendzimir mill tension controller FM458-DP has been studied using CFC-based software Programming FM458-DP rolling mill roll diameter measurement, inertia compensation, friction torque compensation algorithm. commissioning a lot of work to optimize communication, parameter settings and parameters of the motor speed control device.The entire device from the production run so far, the tension control system is stable, reaching the targets required to meet the production requirements of the unit.