抄録
In the deep drawing of thin steel sheets, a complex die with blank hold structure is generally used to prevent wrinkle and crack and the deep drawing process should be repeated several times to get the final product shape. However, in the case of forming a hot rolled steel plate that the thickness is in the range of 3-5mm, it is possible that the final product shape can be formed by simple structure die using few deep drawing process. Furthermore, it is also possible that the high quality product shape with differential thickness on the same section can be formed by combining cold forging processes. In this present paper, the hollow Spline shaft has been manufactured from a thick plate by the deep drawing and extrusion processes. The product quality has been evaluated from various viewpoints.
