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Influence of asymmetric cutting edge roundings on surface topography

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Abstract

For finishing operations in machining, hardened steel hard turning can compete with grinding operations by means of accuracy and productivity. In the past research focussed on the effect of process parameters and tool macro geometry on the resulting surface roughness. Recent investigations show, that the cutting edge micro geometry is an important factor to influence surface quality. The knowledge generated by new methods displays the importance of asymmetric cutting edge roundings on cutting forces, chip formation and tool life. It is known, that chip formation also affects the resulting surface quality. Therefore, this paper investigates the effect of asymmetric cutting edge roundings on the resulting surface roughness in hard turning of roller bearing inner rings. Cutting tests with differently shaped cutting edges and two different feed values are conducted. The resulting surface roughness is measured. The consequent surface quality is explained by geometric coherences between uncut chip thickness and stresses along the cutting edge and the effect of material side flow. It is found, that the cutting edge geometry and the resulting stress distribution around the cutting edge affects the generated surface quality.

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Acknowledgements

The authors thank the DFG (German Research Foundation) for supporting this project in the context of the research program “Resource Efficient Machine Elements (SPP1551)”.

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Authors and Affiliations

  1. Institute of Production Engineering and Machine Tools, Leibniz Universitaet Hannover, Hannover, Germany

    O. Maiss, T. Grove & B. Denkena

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  1. O. Maiss
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  2. T. Grove
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  3. B. Denkena
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Correspondence to O. Maiss.

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Maiss, O., Grove, T. & Denkena, B. Influence of asymmetric cutting edge roundings on surface topography. Prod. Eng. Res. Devel. 11, 383–388 (2017). https://doi.org/10.1007/s11740-017-0742-7

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  • DOI: https://doi.org/10.1007/s11740-017-0742-7

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