A Study on the Plastic Bending of Sheet Metals : 2nd Report, The Spring Back of the Clad Sheet Metals, Part 1

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  • 薄板の曲げ加工に関する研究 : 第2報, 合せ板のスプリングバック, その1
  • ウスイタ ノ マゲ カコウ ニ カンスル ケンキュウ 2

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Abstract

The spring back in the plastic bending of a double clad sheet metal was treated theoretically and experimentally. In consequence of the differences among the mechanical properties of the inside and outside materials in the clad sheet metals, six kinds of the stress state in loading are considered in the analysis of the spring back. The theoretical equations obtained are composed of the mechanical properties and the work cond tions (the thickness of the materials and the radius of curvature in the extreme point of the punch). The materials tested are Brass, Phosphor-Bronze and Nickel-Silver clad in Silver. The results of the spring back calculations agree well with the experimental data. Then, we can evaluate the radius to which the double clad sheet metal must be bent in order to obtain a desired radius of curvature.

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