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Improving tool life by varying resilience and damping properties in close proximity of the cutting edge

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Abstract

During straight turning of workpieces with non-cylindrical geometry or during milling operations on workpieces with hard surfaces such as the scale layer on cast iron the cutting edge has to withstand high recurrent impact loads. These loads can destroy the cutting edge rather spontaneously than by continuous wear. Commonly used criterions such as a flank or crater wear are not suitable. As part of the research presented in this paper mechanical system properties such as resilience and damping are varied and the influence on tool life is presented. Variation was done passively by changing the material of a shim which was positioned directly under the cutting insert and actively by using a piezo actuator to change the pressure of an oil reservoir close to the cutting insert. The results of this research confirm the potential advantages of a properly adjusted resilience close to the cutting edge. However, a single set of optimal properties for different machining operations or workpiece/tool combinations cannot be derived.

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Acknowledgments

The authors wish to thank the German Research Foundation (DFG) for support and funding of the project “Standzeitsteigerung bei der Zerspanung durch Nachgiebigkeitsvariation beim Schneideneintrittstoß”.

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Authors and Affiliations

  1. wbk Institut für Produktionstechnik, Universität Karlsruhe (TH), Kaiserstraße 12, 76131, Karlsruhe, Germany

    J. Fleischer, C. Becke & R. Pabst

Authors
  1. J. Fleischer
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  2. C. Becke
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  3. R. Pabst
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Correspondence to C. Becke.

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Fleischer, J., Becke, C. & Pabst, R. Improving tool life by varying resilience and damping properties in close proximity of the cutting edge. Prod. Eng. Res. Devel. 2, 357–364 (2008). https://doi.org/10.1007/s11740-008-0126-0

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  • DOI: https://doi.org/10.1007/s11740-008-0126-0

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