The chosen toolholding system for high-performance cutting significantly affects not only productivity, but also resource efficiency. A recent test by the wbk Karlsruhe showed that compared with other clamping systems, the SCHUNK high-performance hydraulic expansion holder TENDO E compact enables up to 300% longer tool life. Up to two-thirds can be saved on tools while maintaining the same cutting capacity.
High metal removal rates in high-performance cutting mean that the tools and toolholders used must deliver maximum performance. The SCHUNK hydraulic expansion holder TENDO E compact is designed exactly for that purpose: it combines high holding forces and vibration damping properties with excellent run-out accuracy of < 0.003 mm. In a systematic study the wbk Institute for Production Technology at the Karlsruhe Institute for Technology (KIT) examined the effects of toolholding systems on high-performance cutting. Different toolholder tapers were put to the test in full slot and half slot milling on several machines. The test showed that the SCHUNK high-performance hydraulic expansion holder TENDO E compact enables up to 300 % longer tool life than other systems. Up to two-thirds can therefore be saved on tools while maintaining the same cutting capacity. That means up to 66 % less waste, raw material consumption, and lower tool costs.
Numerous additional effects
The special features of the hydraulic expansion toolholding technology also achieve additional effects: the expansion sleeves and oil-filled expansion chambers dampen the vibrations that occur during machining and absorb load peaks. This not only reduces wear on the tools, but also minimizes chatter marks on the workpiece surface as well as noise emissions during the machining process. At the same time, the even load profile increases the life of the spindle and spindle bearing. Tool changing is also efficient with the SCHUNK high-performance hydraulic expansion toolholder: an Allen key is all that is needed to clamp the tools in a completely energy-neutral process requiring no peripheral equipment. In dry clamping, the highly standardized and affordable precision toolholder performs convincingly at Ø 20 mm and torques up to 900 Nm. At Ø 32 mm it even transfers torques of up to 2,000 Nm, which is 60 percent more than conventional hydraulic expansion toolholders.
Source Schunk GmbH&Co.KG