FIELD: metallurgy.
SUBSTANCE: method includes double-line screw rolling of heated tubular billet plug rolling by three rollers and screw calibration by three rollers. In the capacity of blank there are used coupling fittings of served drill pipes. Thread on fitting is removed by mechanical operation, places of abrupt junction of wall thickness are beveled, heated, specified into rollers and deformed on plug with rolling-out 1.4 at the first passage and with rolling-out 2.0 at the second passage, after what tube is calibrated.
EFFECT: widening of manufacturing capabilities and reduction of manufacturing costs.
1 ex
| Title | Year | Author | Number |
|---|---|---|---|
| MANUFACTURING METHOD OF HEAVY-WALLED TUBES | 2007 |
|
RU2345853C2 |
| METHOD OF TUBE PRODUCTION | 0 |
|
SU839631A1 |
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|
SU997867A1 |
| METHOD OF MANUFACTURE OF COUPLINGS | 2001 |
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RU2217251C2 |
| TECHNOLOGICAL TOOL FOR COLD ROLLING OF TUBES | 1998 |
|
RU2133161C1 |
| METHOD OF PRODUCTION OF SEAMLESS HOT-ROLLED LARGE- AND MEDIUM-DIAMETER PIPES FROM STEEL AND ALLOYS AT PIPE ROLLING PLANTS WITH PILGRIM MILLS FROM TUBULAR BLANKS | 2012 |
|
RU2502570C1 |
| PRODUCTION OF SEAMLESS HOT-ROLLED, SMOOTH, THREADED, BOILER-ROOM, THICK-WALL AND SPECIAL-PURPOSE PIPES 273-630 MM IN DIAMETER AT PRU WITH PILGER MILLS | 2013 |
|
RU2564505C2 |
| PRODUCTION OF SEAMLESS HOT-ROLLED 550×25 mm PIPES AT 8-16" PRU WITH PILGER MILLS | 2012 |
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RU2547973C2 |
| METHOD FOR COLD PILGER ROLLING OF TUBES | 1999 |
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RU2150342C1 |
| METHOD FOR MAKING HOT-DEFORMED SEAMLESS LARGE-DIAMETER TUBES | 2003 |
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RU2243837C1 |
