en.Wedoany.com Reported - German long steel producer Saarstahl uses Junker's Lean Selection shaft grinding machine at its Burbach plant for complete machining of carbide rolls for high-speed wire rod mills. This process provides key support for the production of Europe's finest rolled wire, with diameters as small as 4.5 millimeters.
Saarstahl supplies customized long steel products for the automotive, mechanical engineering, rail transit, construction, and infrastructure sectors. Its product portfolio includes rolled wire, bars, and rail products. The company's strategy focuses on the sustainable transformation of steel production, investing in modern climate-friendly technologies to achieve low-carbon manufacturing. At the Burbach plant, the machining quality of the rolls directly impacts the final quality of the rolling process.
In 2019, Saarstahl sought a more efficient roll machining solution and initiated the first grinding tests with Junker. Previously, the outer diameter and profile of the rolls had to be machined on two separate machines; Junker's Lean Selection shaft grinding machine enables complete machining in a single clamping, and the grinding wheel can also be dressed directly on the machine. This change improved process reliability and roll quality.
At Saarstahl's Burbach plant in Saarbrücken, Germany, a 4-stand rolling mill line is in operation. The Lean Selection shaft grinding machine meets requirements for roundness, dimensional accuracy, surface finish, and contour precision, while reducing auxiliary and changeover times, streamlining the production process. The equipment supports quick change of standard discs without additional modifications, ensuring high flexibility in daily operations. Rolls machined by this grinder are installed in a 10-stand finishing block, with rolling speeds reaching up to 100 meters per second.
Under the current production schedule of 18 shifts per week, the Lean Selection shaft can process up to 500 rolls weekly, ensuring a continuous supply of rolls for four high-speed rolling mill stands. Stefan Heilbrück, head of the rolling mill line at Saarstahl's Burbach plant, stated that since the grinder was put into use in 2023, roll machining has improved both technically and economically. The number of grinding wheels required has been reduced from hundreds in the past to just a few.
The cooperation between the two parties is based on open and honest communication. Thomas Bender, workshop manager at Saarstahl's Burbach plant, noted that the consistent contact person over many years has laid the foundation for rapid problem-solving and reliable service.
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