| 摘要 |
PROBLEM TO BE SOLVED: To provide a technology capable of reducing the seaming man-hour while preventing occurrence of defective shape and defective seaming. SOLUTION: In (a), a first inclined part 41 of a first caulked part 15 of three positioned plate members 40 is positioned at an inclined surface 35 of a slant face die 31, and when a seaming punch 32 is lowered as shown by an arrow D, a first straight part 42 of the first caulked part 15 is bent along an arc part 36 of the seaming punch 32 as shown by an arrow E. In (b), the first straight part 42 of the first caulked part 15 forms an arc-bent part 43 along the arc part 36 of the seaming punch 32 to cover a second straight part 44 of the second caulked part 16. In a first bending step for bending the first straight part 42 of the first caulked part 15 in an arc shape by the seaming punch 32, when the seaming punch 32 is lowered, the first straight part 42 of the first caulked part 15 forms the arc-bent part 43 along the arc part 36 of the seaming punch 32, and the arc-bent part 43 can easily cover the second straight part 44 of the second caulked part 16. COPYRIGHT: (C)2006,JPO&NCIPI
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