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Reduction in axial forging load by low-frequency torsional oscillation in cold upsetting

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Abstract

Torsional oscillation with a maximum frequency of 1.5 Hz was superposed with axial forging load to reduce the axial forging load in cold upsetting process. A cylindrical aluminum workpiece was twisted by rotating the lower die around the z-axis with a maximum alternating amplitude of 22.5° and a maximum angular speed of 0.5 rpm during cold upsetting process with a maximum compression speed of 0.1 mm/s. The torsional oscillation conditions for the load reduction were determined from theoretical and experimental results. It was found that the axial forging load was reduced by larger than 5% under the following conditions: rotation/compression speeds larger than approximately 15°/mm and torsion amplitudes larger than approximately 1°. A maximum reduction in the axial forging load of approximately 80% was obtained in upsetting with a rotation/compression speed with approximately 1700°/mm.

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Authors and Affiliations

  1. Division of Materials and Manufacturing Science, Osaka University, 2-1 Yamadaoka, Suita, 565-0871, Japan

    Ryo Matsumoto, Jinkan Kou & Hiroshi Utsunomiya

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  1. Ryo Matsumoto
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  2. Jinkan Kou
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  3. Hiroshi Utsunomiya
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Correspondence to Ryo Matsumoto.

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Matsumoto, R., Kou, J. & Utsunomiya, H. Reduction in axial forging load by low-frequency torsional oscillation in cold upsetting. Int J Adv Manuf Technol 93, 933–943 (2017). https://doi.org/10.1007/s00170-017-0553-1

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  • DOI: https://doi.org/10.1007/s00170-017-0553-1

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