FIELD: production methods.
SUBSTANCE: on the stretch of the metal it is profiled the lengthwise gofers simultaneously on the all breadth with plate areas between them and side shells with the following multipass riveting. On the final pass on the plate areas and side shells it is profiled with periodical step the transverse goffer with giving to the flank the final shape.
EFFECT: it is exceeded the range of flanks.
2 cl, 2 dwg
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