| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide an apparatus and a method for manufacturing a hollow shaft member, which has a simple structure and an automatic aligning function capable of being manufactured at low cost. <P>SOLUTION: A hydraulic cylinder 36 is provided which relatively moves a material 16 and a punch 18 such that the punch 18 is pushed into an axial central part of the material 16, under the condition that the material 16 is rotated and driven by an electric motor 34 and the punch 18 is rotated and driven by an electric motor 32. Thus, a center line 18A of the punch 18 and a center line of the material 16 are automatically aligned. <P>COPYRIGHT: (C)2013,JPO&INPIT</p> |
