| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for forming a liner for a lightweight high-pressure tank of large capacity with a reduced wall thickness of a mirror part while securing the required thickness for a boss part. SOLUTION: Closing is performed at the working speed of 0.45 mm/rev by a forming roller 35 or 36 to the position of the reduction ratio of "0.8", and at a working speed of 0.90 mm/rev to the position of the reduction ratio between "0.8" and "0.5", and at a working speed of 1.80 mm/rev in the position from the reduction ratio of "0.5". Further, once performing reduction to the required valve diameter or under, the forming roller 35 is changed by the forming roller 36 to further perform the closing. COPYRIGHT: (C)2005,JPO&NCIPI
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