Clamping equipment has a major influence of quality and cost-effectiveness in tool grinding

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Clamping equipment has a major influence of quality and cost-effectiveness in tool grinding

Author: Veronika Gärtner

Source From: Schunk

Posted Date: 2012-03-11

A few thousands of a millimeter in the tool grinding determine the quality of the finished cutting edges. The clamping equipment plays an important role in the process. Its runout and repeat accuracy as well as its vibration behavior have a considerable impact on the grinding result. An example of a precision mount especially well-suited for grinding is the TENDO hydraulic expanding toolholder from SCHUNK, the competence leader for clamping technology and gripping systems.

Due to a 25° bevel on the chuck nose, it has a 40% slimmer interfering contour than other hydraulic toolholder. Its runout and repeat accuracy of less than 0.003 mm ensure a consistent removal of material during the grinding process and increase process safety with the grinding of serial tools. In addition, the hydraulic systems dampen vibrations and thereby ensure an outstanding surface quality. The results can be seen for themselves: The good retention of shape and dimensional accuracy on the cutting edge increase the service life of tools by up to 75%. With TENDO, shank tools with a diameter of up to 32 mm can be clamped with a depth of up to 95 mm. Intermediate sleeves further enhance the clamping possibilities. The simple handling, the sealed clamping screw and the long service life make the TENDO hydraulic expanding toolholder an affordable aid for grinding operation.

Extension ensures better interference between grinding wheel and the toolholder

The hydraulic expanding toolholder can be combined with a 100 mm long tool extension of the TRIBOS polygon clamping technology from SCHUNK. Its slim interfering contour ensures that the grinding wheel can run out unimpeded, even if long cutting edges are used. The hydraulic expanding toolholder dampens vibrations and optimally aligns the extension with the tool blank. As a result, the runout accuracy at the sharp cutting edge is increased and extremely precise tool geometries are provided. Both systems are maintenance-free and resistant to dirt, such as tiny grinding particles. This is also an important advantage over mechanical clamping systems, which are composed of several individual movable parts. TRIBOS extensions cover all clamping diameters from 3 mm to 20 mm, and have a runout and repeat accuracy of less than 0.003 mm. Tools can be clamped several thousand times with precision and reliability without showing any signs of fatigue. Combined with the power-actuated TENDO hydraulic expanding toolholder, you can also use this in automated welding processes.

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