Strip processing in aluminium rolling mill
In October 2023, ElvalHalcor Hellenic Copper and Aluminium Industry S. A. commissioned a new high-speed side-trimming line for aluminium strip. Designed to operate at strip speeds of up to 1,650 m/min, the new trimming line is one of the fastest of its kind in the world.
The new line for Elval“s Oinofyta works in Greece was supplied by GEORG on a turnkey basis. The supply range comprised all systems from the payoff reel up to the transfer of the coil to the packaging area. The line is used to side-cut up to 2,100-mm-wide aluminium strip of grades 2XXX to 5XXX.
The line operates virtually fully automatically: It receives all parameters such as width, thickness and alloy of each coil to be processed from the works MES. Based on these data, the line control system adjusts the cutting depth of the blades and the cutting gap width. By optimizing the processes in all plant areas, very short coil-to-coil times are achieved, enabling annual throughputs of more than 400,000 t.
To prepare the coils for the trimming process, an inline drum-type shear crops the coil ends at strip speeds of up to 200 m/min. The high precision and repetition accuracy with which the side-cutting blade is adjusted achieves a cutting accuracy distinctly superior to that required by the DIN EN 485 standard. Due to the exceptionally high line speed, the trimmings are cleaned by a suction system and automatically wound on a scrap winder.
The spraying width of the electrostatic oiling system automatically adjusts to the respective strip width, avoiding excessive oil accumulation on the edge zone. Suction systems arranged along the line ensure that oil droplets coming off the strip surface due to the high line speed are reliably removed. A manipulator fits and centers the empty sleeves on the recoiler mandrel. The coil head-ends are automatically bonded to the sleeves.
GEORG supplied the line complete with a wide range of measuring and inspection systems such as a thickness measuring system, a pinhole detection device and a surface inspection system.
Detlef Neumann, Sales Manager Finishing Lines at GEORG, commenting on this successful project: „In the global aluminium industry, there is just a handful of trimming lines operating reliably at such high speed. Therefore, we are very happy and proud that our customer has issued the FAC after a very short test run and that the line has been operating highly efficiently ever since.“
About Heinrich GEORG Maschinenfabrik
GEORG is the specialist for sophisticated and economical solutions in coil processing and roll grinding, combining classic mechanical engineering with intelligent process optimization and service solutions. The advanced coil processing lines, the world’s leading production lines for the transformer industry and the modern roll grinding machines are used in renowned companies around the world. Not least because of their high degree of automation, GEORG machines make an important contribution to process optimization and thus to the economic success of customers. The product range is complemented by a series of consulting, planning and service offerings and is used for demanding and standardized applications.
The third-generation family-run company with over 500 employees and worldwide sales and service branches serves the energy, mobility and industrial markets in particular. GEORG stands for responsible action and focuses on resource conservation and energy efficiency.
For more information, please visit georg.com
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