FIELD: process engineering.
SUBSTANCE: invention relates to metal forming, particularly, to forming of return bends from super thin pipes by elastic medium. In expansion of pipe billet in die by internal pressure and forming bulged surfaces adjoining the bending minimum radius zone, filler final pressure is applied in compliance with relationship given the formula.
EFFECT: higher quality, lower costs.
1 dwg, 1 ex
| Title | Year | Author | Number |
|---|---|---|---|
| METHOD AND DIE FOR FORMING STEEP-CURVED BRANCH PIPES | 1993 |
|
RU2047405C1 |
| METHOD OF MAKING FLEXIBLE RETURN BENDS | 2013 |
|
RU2528928C1 |
| METHOD OF MAKING SHARPLY BENT BRANCH PIPES BY BENDING | 1994 |
|
RU2094151C1 |
| METHOD OF MAKING THE FLEXIBLE RETURN BENDS | 2012 |
|
RU2510806C2 |
| METHOD FOR MAKING SHARPLY BENT BRANCH PIPES | 2003 |
|
RU2241561C1 |
| METHOD OF PIPE BENDING TO MAKE REITERATING-SHAPE BENDS | 2013 |
|
RU2534483C1 |
| HYDRAULIC PRESS FOR SHAPING SHARPLY BENT BRANCH PIPES | 1998 |
|
RU2172221C2 |
| METHOD OF FORGING BELLOWS FORM TUBE BILLETS | 2012 |
|
RU2502574C2 |
| METHOD FOR SHAPING OF EXCEPTIONALLY THIN-WALLED MULTI-LAYER BELLOWS | 2006 |
|
RU2343033C2 |
| METHOD OF PRODUCING SEVER BENT PIPE BLANKS | 0 |
|
SU1771844A1 |
