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TENDO hydraulic expansion toolholders for grinding

Story added 04 March 2010.

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During tool grinding, microns decide on the quality of the manufactured cutting edges. In order to achieve optimum results in sharpening dull tools, the right selection of toolholder is imperative. A favorable and slim interference free contour for an unhindered machining area of the grinding wheel is needed. High clamping forces at a low clamping depth and a high metal removal are characteristics that every tool grinder desires. Large clamping depths for mounting special tools and high run-out and repeat accuracies are also needed. With its new tool grinding holder program, Schunk Intec meets all the demands of the end user.

Since the toolholder nose is beveled 25°, the interfering contour of the TENDO hydraulic expansion toolholder is 40% slimmer than other hydraulic expansion toolholders. The run-out and repeat accuracy of less than 3 microns provides even material removal during the grinding process and increases the process reliability of ground serial tools. The result is an excellent accuracy in shape and dimension at the lip of the tool. In turn, the service life of the tool is increased. By using a TENDO toolholder, tool shanks of up to 32mm diameter can be clamped at a depth of up to 95mm. When combined with intermediate sleeves the clamping possibilities are endless. Due to the easy handling, the sealed clamping screw and the long service life, Schunk is focusing on efficiency.

The 100mm long tool extensions of the TRIBOS polygonal toolholder series are designed for achieving the optimum interference contour. They cover a clamping range from 3mm up to 20mm. This patented clamping technology also provides a run-out and repeat accuracy of less than 3 microns and can be clamped in all toolholders. This combination gives the end user a cost-effective alternative with flexiblity. The one-piece TRIBOS extensions have no wear parts and this guarantees a long service life. On customer request, extensions can also be manufactured with a gripper collar. This makes the TRIBOS suitable for the automatic loading of grinding machines with a gripping system.

If both toolholder systems are combined, the user has twice as many advantages. The TENDO hydraulic expansion toolholder dampens vibrations and the TRIBOS extension is perfectly aligned with the tool blank. The TRIBOS extension provides the minimum interference contour and with outstanding run-out accuracy, the combination delivers extremely precise tool geometries.

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