| 摘要 |
PROBLEM TO BE SOLVED: To obtain a working method for the platelike parts in which the connection strength between a wire joint for the platelike part and a peripheral frame is strengthened and a required outer shape is obtained by only cutting off the platelike part with a cutting tool such as a nipper. SOLUTION: In a working method of the platelike part that the platelike part 2 partially connecting a plurality of wire joints 4 to a peripheral frame 6 is punched to the surface of a metal plate base material 1, the external shape line except the corner part/rounded external part of each platelike part 6, the wire joint parts 4 and a bottom side 3a facing these wire joints are formed so as to position inside the external line of each platelike part, further, the joint part punched hole 3 of trapzoidal cross section, which has a length of the bottom side 3a smaller than a width of a corresponding wire joint 4, is arranged, the part form an external shape line of the corresponding platelike part 2 to both sides 3c, 3d of the joint part punched hole 3 is cut.
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