捩り加工を施した螺旋ばねの研究（第1報）基礎的諸現象
1955 年 19 巻 8 号 p. 453-456
詳細
1955 年 19 巻 8 号 p. 453-456
Applying pretwisting to the wire of a helical spring those obtained under a remarkably strong spring can be made as compared with prestressing or setting method.In this paper the principle of this process and several fundamental phenomena observed in these springs are mentioned. Also the meaning of the bluing treatment of springs is discussed. When loading-the coil diameter of a spring made of cold drawn wire expands, while it contracts after it was annealed. By annealing not only the coil diameter, but also the length of a spring changes. These phenomena were explained as the effect of the anisotropic properties of the wire and the fading of residual stresses involved during coiling and twisting of the wire.
