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Improvement of Straightner in Tension Annealing and Rotational Blade Straightner for Superfine Wire

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  • Urabe Motohiko
    Major in Applied Mechanics, Graduate School of Fundamental Science and Engineering, Waseda University
  • Asakawa Motoo
    Department of Applied Mechanics and Aerospace Engineering, Waseda University
  • Kajino Satoshi
    National Institute of Advanced Industry Science and Technology
  • Yoshida Masahiro
    Department of Applied Mechanics and Aerospace Engineering, Waseda University

Bibliographic Information

Other Title
  • 回転矯正および温間引張り矯正を用いた極細線の高真直化
  • カイテン キョウセイ オヨビ オン カン ヒッパリ キョウセイ オ モチイタ キョクサイセン ノ コウシンチョクカ

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Abstract

Higher straightness of superfine wires of 0.1 mm or less in diameter is in demand for recent development of electronic devices.<br>A rotational blade straightener is effective for straightening superfine wires. It is particularly effective for straightening coiled wires because the straightener can bend wires along the longitudinal and circumferential directions. We found that a higher rotational speed of blades, lower feeding velocity, and gradual decrease in curvature ratio during straightening were very effective in producing excellent straightness in rotational blade straightening.<br>Tension annealing is also one of the popular methods to straighten superfine wires. The tension annealing has a higher level of straightening effect without surface damage. The phosphor bronze and the tungsten superfine wires are used in this study. We observe that the initial radius of curvature, roundness and work hardening exponent are very important factors to make excellent straightness in tension annealing.

Journal

  • Tetsu-to-Hagane

    Tetsu-to-Hagane 95 (11), 794-800, 2009

    The Iron and Steel Institute of Japan

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