FIELD: rolled tube production processes and equipment, namely manufacture of seamless hot deformed tubes in tube rolling aggregates with pilger mills.
SUBSTANCE: method comprises steps of heating ingots and billets till yielding temperature; piercing them to sleeves in screw rolling mills; rolling sleeves to tubes in pilger mills between rolls with periodic profile and with cross outlet angle 20-25° at tilting sleeve-tubes. In pilger mills tubes are rolled at tilting them by 70±2° or 110±2°.
EFFECT: enhanced quality of tubes due to lowered wall thickness difference, improved efficiency of pilger mills, reduced cost of ingot- tube conversion process.
1 dwg, 1 tbl
| Title | Year | Author | Number |
|---|---|---|---|
| METHOD FOR ROLLING SEAMLESS HOT ROLLED CASING TUBES WITH BUTTRESS THREAD | 2005 |
|
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| PRODUCTION OF SEAMLESS COLD-RESISTANT AND NONCORROSIVE 377×9-16 AND 426×9-18 mm PIPES AT PRU 8-16 WITH PILGER MILLS WITH STRINGENT REQUIREMENTS TO CURVATURE | 2013 |
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| ROLL OF PILGRIM MILL FOR ROLLING OF THIN-WALLED PIPES FROM COLD-RESISTANT AND CORROSION-RESISTANT GRADES OF STEEL | 2012 |
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| PRODUCTION OF SEAMLESS HOT-ROLLED PIPES SIZED TO 610×28-32×5300-6000 mm FROM "15Х1М1Ф"- AND "10Х9МФБ-Ш"-GRADE STEELS FOR PIPELINES OF BOILER UNIT STEAM INTERMEDIATE OVERHEATING | 2012 |
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| PRODUCTION OF SEAMLESS HOT-ROLLED PIPES SIZED TO 610×28-32×4700-5400 mm FROM "15Х1М1Ф"- AND "10Х9МФБ"-GRADE STEELS AT PRU 8-16'' WITH PILGER MILLS FOR PIPELINES OF BOILER UNIT STEAM INTERMEDIATE OVERHEATING WITH HIGHER MECHANICAL PROPERTIES | 2012 |
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RU2522514C1 |
| MANUFACTURING METHOD OF SEAMLESS HOT-ROLLED TUBES ON PIPE ROLLING UNITS WITH PILGER MILLS FOR STEAM BOILERS, STEAM LINES AND HEADERS OF UNITS WITH HIGH AND SUPERCRITICAL STEAM PARAMETERS | 2013 |
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RU2545942C2 |
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RU2261151C1 |
