Configuration Of Multi-function Recoiling Line And Study Of Its Key Technologies

Recoiling line is one of cold-rolled final product units and aims to carry the functions of side-trimming, oiling and coil-divided. In recent years, multi-functions’ recoiling line have arisen, such as inspection and grinding line for auto plate, leveling line for improving flatness and recoiling line capable of both inspection and flatness improvement. The Cold Rolling Mill of Benxi Iron&Steel Co. is planning to establish such a line according to the badly flatness grade-decreasing and metal balance of common cold rolling products.The paper has deep study in this plan-established recoiling line. Firstly, investigation and research about actual capability in all lines is carried out in terms of the whole plant’s real situation. And then products mix is determined with metal balance. Basic requirements of process are fixed on the base of products mix and flatness defects and process equipment layout is further finished.After process equipment layout and according to process requirement, automatic control system is established with31evels:drive system, level1and level2under taking consideration of its commonality and compatibility with other lines, system stability, equipment’s advancement and the accomplishment of process function’s accuracy. In the configuration of drive system, converter S120, which is module launched by SIEMENS in2008, is studied. Recoiler tension control and compensation are analyzed with considering process module integrated internally in module CU320of converter S120. in the establishment of level1, integrating control device and configuring web are accomplished around the core of S7-400recent widely applied. And the emphasis is on the study of process module FM458, which is used to analyze accuracy of coil diameter in the payoff reel.Among single complete of equipments, tension leveler has the following properties, for example, the largest invest and consumption, the most degree of influence on quality. It is the key process equipment in the multi-functions recoiling line. So power consumption, accuracy, elongation control for various types are studied in the paper. Contrast to the flaws that exists in the old line, construction and control mode of the unit is then fixed. At the same time, the paper deals with pre-study for configuration of process equipment, the accomplishment of automatic control, critical equipment and process functions that can be applied in the plan.