Reduction of chatter marks in volume machining: That toolholders also have a significant effect on the surface quality in volume machining was confirmed in a study by the wbk Institute for Production Technology in Karlsruhe, which was conducted under the supervision of Prof. Dr.-Ing. Jürgen Fleischer and presented in 2014. Different toolholders were tested in full slot and half slot milling on several machines. It was demonstrated that the SCHUNK high-performance hydraulic expansion toolholder TENDO E compact achieves up to 300 percent longer tool life than a comparable heat shrink holder. Especially noteworthy: with only one exception the SCHUNK TENDO E compact hydraulic expansion toolholder always achieved better surface qualities than heat shrink toolholders. The deeper the grooves, the stronger was the effect of chatter marks. The damping properties of hydraulic expansion tech¬nology results in longer tool life as well as significantly better surface quality. Even at an identical surface quality it is possible to achieve higher cutting and feed rates.
Effective double for 5-axis machining: For high-precision 5-axis machining SCHUNK TENDO E compact hydraulic expansion toolholders, and SCHUNK extensions can be combined to produce extremely effective clamping units. In the case of minimal interfering contours the hydraulic expansion toolholders provide strong support for the extensions while damping the vibrations that occur during machining. The combination of run-out accuracy, and vibration damping protects the tool cutting edge, lengthens the tool life and provides for brilliant workpiece surfaces. For stable tool change, TENDO hydraulic expansion toolholders require only a conventional Allen key; for TRIBOS SVL, a simple, manually actuated clamping device is sufficient. The entire clamping process is completed within a few seconds. Both clamping devices are maintenance-free and insensitive to impurities.
Author: Heinold Kostner, Dipl. Wirt. Ing. (FH); Head of Product & Portfolio Management for Clamping Technology Lauffen; SCHUNK GmbH & Co. KG, Lauffen/Neckar
END
