3次元熱間曲げ焼入れの成形特性

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書誌事項

タイトル別名
  • Forming Characteristics in Three-Dimensional Hot Bending and Direct Quench Process
  • 3次元熱間曲げ焼入れの成形特性 : 3次元熱間曲げ焼入れ技術の開発(第1報)
  • 3ジゲン ネツカン マゲ ヤキイレ ノ セイケイ トクセイ : 3ジゲン ネツカン マゲ ヤキイレ ギジュツ ノ カイハツ(ダイ1ポウ)
  • ―3次元熱間曲げ焼入れ技術の開発 第1報―
  • ―Development of Three-Dimensional Hot Bending and Direct Quench Technology(1)―

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抄録

To improve fuel economy and crash safety in the automotive industry, three-dimensional hot bending and direct quench (3DQ) technology, which enables the formation of hollow automotive parts with a tensile strength of 1470 MPa or more, has been developed. In this paper, the forming characteristics in 3DQ are investigated by experiments and FEM analysis. The main results are as follows. (1) Measured and calculated bending force and twisting torque are low and within the load capacity of general robots. (2) The constraint at the tube top by the robot in 3DQ can increase the accuracy of products even in inhomogeneous coiling. (3) A narrow deformation area suppresses the change in the product cross section, and it is clarified that the calculated maximum value of σθ/σl is closer to 0.5 in a narrow deformation area, where σθ is circumferential stress, and σl is longitudinal stress. (4) The effects of the maximum heating temperature and the feeding speed on the deformation area are small.

収録刊行物

  • 塑性と加工

    塑性と加工 56 (658), 961-966, 2015

    一般社団法人 日本塑性加工学会

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