FIELD: sheet forming production, namely forming hollow articles in sheet-forming automatic presses. SUBSTANCE: method comprises steps of punching in sheet material hole with petals; flanging hole, then punching in petals technological openings for fixing semifinished product at performing subsequent forming operations. Contour of punched hole is equidistant with contour of flanged hole. EFFECT: enlarged manufacturing possibilities at forming parts with bottom hole in automatic presses. 4 dwg
| Title | Year | Author | Number |
|---|---|---|---|
| METHOD OF DEBURRING HOLES FOR FLANGING | 0 |
|
SU1433566A1 |
| HOLLOW ARTICLES PRODUCTION METHOD | 0 |
|
SU963645A1 |
| METHOD OF MAKING CONE HOLLOW ARTICLES WITH FLAT FLANGE AND OPENING IN ITS BOTTOM | 1991 |
|
RU2014929C1 |
| METHOD OF PRODUCING HOLLOW ARTICLES | 0 |
|
SU1611511A1 |
| METHOD OF FORMING BOX-PLAN SQUARE PARTS WITH BOTTOM BORE BY COMBINED DRAWING AND FLANGING | 2011 |
|
RU2490084C2 |
| METHOD OF PRODUCING DEEP HOLLOW PARTS | 0 |
|
SU1393501A1 |
| FABRICATION OF COMPLEX LARGE-SIZED ALL-MOULDED PART FROM WELDED BILLET | 2013 |
|
RU2578877C2 |
| METHOD OF MAKING ENAMEL WARE, PARTICULARLY TEAPOT | 0 |
|
SU1801044A3 |
| METHOD OF MANUFACTURING COMPLEX LARGE-SIZED FULLY MOULDED PART FROM WELDED WORKPIECE | 2015 |
|
RU2627082C2 |
| METHOD OF FLANGING SMALL-DIAMETER HOLES | 0 |
|
SU1274806A1 |
