Parting off on turning centers and multitasking machines
Extended range of blades
Sandvik Coromant has introduced new blades for its CoroCut QD parting-off system. In combination with a new process methodology, the stability of the tool is to be significantly improved by realigning the resulting cutting force, according to the manufacturer. In conventional tool configurations for parting off on turning centers and multitasking machines, the feed movement in the XZ plane is subject to system-related restrictions: In parting-off processes, the resulting vector of cutting forces is inevitably directed across the tool cross-section as a bending load, which leads to high loads and possible deformations.
To remedy this, the manufacturer has developed a solution that takes advantage of modern turning centers and multitasking machines to guide the tool in the Y-direction. With the new concept, the top of the indexable insert is positioned parallel to the end of the blade. In this way, the resulting vector of cutting forces is approximately aligned with the longitudinal axis of the blade. According to the manufacturer, the FEM analysis confirms that this eliminates the critical stresses typical of conventional tools and increases the rigidity of the blades by a factor of six compared to standard designs. This enables faster feed rates or the machining of longer overhangs without sacrificing stability. sw
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