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A Coruña, Spain

Fernandez S.,Russula Headquarters Europe | Sanchez D.,Russula Headquarters Europe
MPT Metallurgical Plant and Technology International | Year: 2012

Understanding the tension-free control methods, shear-cut optimization and optimal cooling systems, will enable productivity and production quality to be improved and metallic losses and downtimes to be reduced in rolling mills. It is very important to anticipate equipment failures during minimizing downtimes, since a good preventative maintenance program will save costs and unplanned downtime. The integration of all sensors, actuators and equipment within the same data acquisition and control system simplifies the recording and processing of data. During the product changeover it is necessary to change all or part of the mill configuration. All parameters and settings are stored in the recipe database, such as gap and groove position. Once the mill has been set up and adjusted, the next step is to verify that each drive is ready to roll. This phase is very important, so the system must have all the alarms and interlocks. For each product, there are factors that prevent increasing production speed, such as bar cooling time, the performance and power of the main drives or the maximum capacity of the reheat furnace. Source

Fernandez S.,Russula Headquarters Europe | Gonzalez J.R.,Russula Headquarters Europe
MPT Metallurgical Plant and Technology International | Year: 2014

Russula has developed an algorithm that improves control in two-strand wire rod mills. The optimized model is configured using a master line and a follower line with upstream control. The upstream control loop sends the necessary speed corrections to maintain a stable loop height. The output speed is kept fixed, so that the laying head does not suffer any variation unless the production rate is rising or decreasing. During rolling, only small corrections are made to the speed of the finishing block to compensate for the imbalances between the two lines. The reduction factors of the stands, miniblocks and finishing blocks remains fixed, so that an increase/decrease in the speed of the last stand in the intermediate mill will lead to an increase/decrease in the end product speed of the follower line. Source

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