FIELD: technological processes.
SUBSTANCE: invention relates to metal pressure forming and can be used in production of thin-wall bent pipes. Prior to bending, snow is placed in pipe to be sealed. To accommodate the filler, a ramming device is used, with the condition of compacting the snow by a value which does not cause a diameter increase, and after bending the snow is removed from the pipe.
EFFECT: higher quality of pipe inner surface.
1 cl
| Title | Year | Author | Number |
|---|---|---|---|
| THIN-WALL TUBE BENDING METHOD | 2006 |
|
RU2322320C2 |
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|
SU1165509A1 |
| METHOD OF MANUFACTURING BENT TUBE STOCKS | 2006 |
|
RU2324560C2 |
