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
Locating natural resources in the deep sea – easily and eco-friendly
25.04.2016 | Laser Zentrum Hannover e.V.
Aachen Center for Additive Manufacturing
05.04.2016 | Fraunhofer-Institut für Lasertechnik ILT
Using an ultra fast-scanning atomic force microscope, a team of researchers from the University of Basel has filmed “living” nuclear pore complexes at work for the first time. Nuclear pores are molecular machines that control the traffic entering or exiting the cell nucleus. In their article published in Nature Nanotechnology, the researchers explain how the passage of unwanted molecules is prevented by rapidly moving molecular “tentacles” inside the pore.
Using high-speed AFM, Roderick Lim, Argovia Professor at the Biozentrum and the Swiss Nanoscience Institute of the University of Basel, has not only directly...
If a person pushes a broken-down car alone, there is a certain effect. If another person helps, the result is the sum of their efforts. If two micro-particles are pushing another microparticle, however, the resulting effect may not necessarily be the sum their efforts. A recent study published in Nature Communications, measured this odd effect that scientists call “many body.”
In the microscopic world, where the modern miniaturized machines at the new frontiers of technology operate, as long as we are in the presence of two...
Researchers from the Max Planck Institute Stuttgart have developed self-propelled tiny ‘microbots’ that can remove lead or organic pollution from contaminated water.
Working with colleagues in Barcelona and Singapore, Samuel Sánchez’s group used graphene oxide to make their microscale motors, which are able to adsorb lead...
Neutron scattering and computational modeling have revealed unique and unexpected behavior of water molecules under extreme confinement that is unmatched by any known gas, liquid or solid states.
In a paper published in Physical Review Letters, researchers at the Department of Energy's Oak Ridge National Laboratory describe a new tunneling state of...
Honeycomb structures as the basic building block for industrial applications presented using holo pyramid
Researchers of the Alfred Wegener Institute (AWI) will introduce their latest developments in the field of bionic lightweight design at Hannover Messe from 25...
27.04.2016 | Event News
15.04.2016 | Event News
12.04.2016 | Event News
04.05.2016 | Physics and Astronomy
04.05.2016 | Physics and Astronomy
04.05.2016 | Materials Sciences