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New Tool Grinding Toolholder Launched by Schunk

Story added 20 July 2010.

MORE NEWS

Schunk has now launched its exciting new Prismo tool grinding toolholder. With its variable clamping diameter, a threefold prism guidance and inter-meshed chuck jaws, the all-purpose mounting achieves high repeat accuracies of less than 0.005mm. This enables the innovative new Prismo to almost completely avoid tube unbalance, delivering ideal pre-conditions for automated manufacturing of small batch sizes.

A threefold prism clamping provides the basis for the toolholder to clamp shaft diameters from 5 to 20mm with remarkable precision. Each of the five chuck jaws is guided by an eroded double prism. A third prism is eroded on the clamping face and this directly contacts the tool shank. This ensures the toolholder always adjusts itself to the individual tool diameters. This is an important difference when compared to conventional solutions, where the clamping face is just circular ground. Even deep hole drills and tools with a twist, can be machined precisely with the Prismo.

During the clamping operation, the five hard and coated chuck jaws intermesh. The basic sleeve and the robust design provide a high level of stiffness and rigidity to the toolholder. Moreover, the stable guidances reduce a ‘swing-out’ of the grinding wheels. At an overhang length of 2.5 x D and a tool diameter of 20mm, the Prismo provides a repeat accuracy of less than 0.005mm. In order to avoid pollution and to offer permanently high precision, the Prismo is rinsed during the grinding operation with clean oil.

Regardless of the diameter to be machined, the X-axis of the grinding toolholder remains unchanged. All the chuck jaws maintain an identical axial position, so time-consuming additional programming and the danger of a crash due to incorrect axis offsets are eliminated.

Compatibility is assured as every machine interface is feasible. The Prismo mechanical prism toolholder meets all the requirements for very precise and economical tool grinding on the machines of many well-known manufacturers. It is considered to be flexible and effective with many machine manufacturers and OEMs specifying the system.

Conventional collet chucks and high-quality toolholders that cover a large clamping range are used for automated grinding, these systems lose their run-out accuracy after a certain time as the risk of tube imbalance occurs. The new Prismo toolholder generation from Schunk assures flexibility and the highest level of precision. Therefore long set-up times, regular quality controls, complicated re-grinding of jaws and spare part procurement are no longer necessary. Discover with Prismo, the new standard in automated tool grinding.

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