FIELD: plastic material working. SUBSTANCE: method comprises steps of forming joined portion of groove and flat surface of panel in press; before forming step corrugating sheet blank with pitch and profile of its section corresponding to predetermined parameters of parts; straightening ends of corrugations for making inclined wrinkles along periphery in zone of intermediate portion between corrugations. EFFECT: possibility of making panels with grooves having depth more than their radius.
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|---|---|---|---|
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RU2502575C2 |
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SU1324715A1 |
| 0 |
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SU1784364A1 | |
| METHOD OF PRODUCING HOLLOW ARTICLES AND DIE FOR EFFECTING SAME | 0 |
|
SU1590160A1 |
