FIELD: metallurgy.
SUBSTANCE: several cycles consisting of a pipe end heating operation and an operation of its upsetting with a puncheon in a cavity of a split die on an upsetting press are subsequently performed. During the second operation, upsetting is performed using a die and a puncheon of the same sizes as at upsetting during the first operation. Besides, upsetting during the second operation is performed with a shrinkage value that is determined from the given ratio depending on the value of deviation of pipe wall thickness, nominal outer diameter of the pipe and nominal thickness of the pipe wall.
EFFECT: reduction of deviations of geometrical dimensions of internal upsetting zones.
| Title | Year | Author | Number |
|---|---|---|---|
| COMBINED PIPE END UPSETTING METHOD | 2013 |
|
RU2542179C1 |
| METHOD OF COMBINED PIPE END UPSETTING | 2011 |
|
RU2474485C2 |
| METHOD FOR COMBINED PIPE ENDS UPSETTING | 2018 |
|
RU2686503C1 |
| METHOD OF OIL WELL TUBING TREATMENT | 2016 |
|
RU2628803C1 |
| METHOD OF COMBINED PIPE END UPSETTING | 2014 |
|
RU2599467C2 |
| METHOD OF OILWELL TUBING PIPE-END UPSETTING | 2009 |
|
RU2414983C2 |
| PIPE-END UPSET MALE DIE | 2010 |
|
RU2446905C2 |
| THERMOMECHANICAL PIPE TREATMENT METHOD | 2012 |
|
RU2500821C1 |
| THREADED OIL-FIELD PIPE JOINT WITH INCREASED AIR-TIGHTNESS (VARIANTS) AND PRODUCTION METHOD THEREOF (VARIANTS) | 2004 |
|
RU2256767C1 |
| METHOD OF PRODUCING TUBES WITH THICKENED ENDS | 0 |
|
SU1547932A1 |
