All the rolls have to be precisely vertically aligned to ensure the mechanical stresses they are exposed to are equally distributed. Up into now, the roll positions have been measured and documented manually in an expensive process that's also prone to error.
The new laser system provides highly precise digital measurements that take less time to complete. Measurement data is sent directly to the control unit, which prevents errors caused by manual data transfer. The data also allows technicians to monitor conditions at the plant, which means maintenance can be carried out in line with actual needs rather than at set intervals, which was previously the case.
Continuous casting plants cast liquid steel into slabs a few meters long and several centimeters thick. These slabs are guided along long lines between rolls. The rolls must be precisely vertically aligned. If they are not, they will be exposed to varying levels of pressure from the slab and will also exert different levels of pressure on the latter, which can negatively impact slab quality and damage the roll bearings.
The rolls are regularly calibrated to prevent these problems. The process involves removing individual segments of the strand guide line. Each segment contains several rolls, and measurements are taken by holding an iron ruler several meters long at a specific height above the rolls. Workers then measure the distance of each roll to the ruler and write down the results. This method takes time, can lead to errors, and becomes imprecise in the middle because the ruler bends at that point.
The new Simetal Opal laser measuring system measures all spots with equal precision and is very easy to use. The system's rotating laser emits beams that generate a reference line parallel to the top side of the rolls. A linear photodetector is vertically mounted on the rolls.
The distance between a roll and reference line is determined according to which photodetector segment the laser beam hits. Workers move along the line and place the detector on each roll, whose alignment is then precisely measured down to less than one-tenth of a millimeter.
Simetal Opal is part of a continuous casting plant monitoring concept developed by Siemens. The system can be integrated into existing plants and is already being used in the manufacturing process at the Siemens facility in Shanghai.
Dr. Norbert Aschenbrenner | Siemens InnovationNews
JULABO: The Power of ThermodynamicsTM - New PRESTO® A45 and A45t
16.04.2015 | JULABO GmbH
Short Laser Pulses for Material Deposition with Cold Spray Technology
13.04.2015 | Fraunhofer-Institut für Lasertechnik ILT
Astronomers from Chalmers University of Technology have used the giant telescope Alma to reveal an extremely powerful magnetic field very close to a supermassive black hole in a distant galaxy
Astronomers from Chalmers University of Technology have used the giant telescope Alma to reveal an extremely powerful magnetic field very close to a...
A team of physicists from MPQ, Caltech, and ICFO proposes the combination of nano-photonics with ultracold atoms for simulating quantum many-body systems and creating new states of matter.
Ultracold atoms in the so-called optical lattices, that are generated by crosswise superposition of laser beams, have been proven to be one of the most...
According to new research out of the Texas A&M Health Science Center College of Medicine, that is indeed the case. Chetan Jinadatha, M.D., M.P.H., assistant...
Researchers from ICFO, MIT and UC Riverside have been able to develop a graphene-based photodetector capable of converting absorbed light into an electrical voltage at ultrafast timescales
The efficient conversion of light into electricity plays a crucial role in many technologies, ranging from cameras to solar cells.
Electrical charges not only move through wires, they also travel along lengths of DNA, the molecule of life. The property is known as charge transport.
In a new study appearing in the journal Nature Chemistry, authors, Limin Xiang, Julio Palma, Christopher Bruot and others at Arizona State University's...
13.04.2015 | Event News
25.03.2015 | Event News
19.03.2015 | Event News
17.04.2015 | Power and Electrical Engineering
17.04.2015 | Earth Sciences
17.04.2015 | Physics and Astronomy