| 摘要 |
PROBLEM TO BE SOLVED: To provide a manufacturing method of a bellows-shaped metal sheet which can produce the bellows-shaped metal sheet with narrow and uniform apertures in a superior production efficiency. SOLUTION: In the manufacturing method of the bellows-shaped metal sheet with the narrow and uniform apertures, a metal sheet is press-formed into a bellows shape having knuckles 31 of an arclike shape in a small radius of curvature at each turn-back point, and then the bellows-shaped metal sheet 2b is compressed from both sides so as to narrow apertures. Thus, the bellows shaped metal sheet with narrow and uniform apertures 2c can be manufactured, avoiding such a state that only a part is lapped tight while the other part is left apart. COPYRIGHT: (C)2005,JPO&NCIPI
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