In the deep drawing of thin steel sheets, a comptex die with blank hold structure is generally used to pTevent wrinkle and crack and the deep drawing process should be repeated several times to get the final product shape. However, in the case of forminga hot rolled steel p]ate that the thickness is in the range of 3-5mm, it is possible that the final product shape can be forrned 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 forrned by combining cold forging processes. In this present paper, the hollow Spline shaft has been manufactured from a thiek plate by the deep drawing and extrusion processes, The product quality has been evaluated from various viewpoints,
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