FIELD: metallurgy.
SUBSTANCE: said billets are heated to ductility temperature and pierced at helical rolling mill to sleeve billets. Sleeves are rolled at Pilger mill, dip-formed and Pilger head is smooth-rolled at rolls. Round cross-section roll body has its pass with tangential angles, pass length being composed by hammer with central angle of 90-100°, finishing section with central angle of 70°, lengthwise exit angle with central angle of 40° and idle section with central angle of 150-160°. Higher quality of pipes, durability of rolls and longer life of equipment are ensured by dip-forming of sleeves at rolling at roll rpm specified by definite mathematical relationship.
EFFECT: lower metal consumption index, higher efficiency.
| Title | Year | Author | Number |
|---|---|---|---|
| PRODUCTION OF 273-630 MM DIAMETER 8-90 MM DEEP WALL SEAMLESS HOT-ROLLED PIPES AT PIPE ROLLING PLANT 8-16'' WITH PILGER MILLS | 2012 |
|
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| PRU WITH PILGER MILLS FOR ROLLING OF SEAMLESS HOT-ROLLED 273-630 mm-DIA PIPES | 2013 |
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|
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| ROLL OF PILGER MILL FOR ROLLING SEAMLESS HOT-ROLLED 610×28-32 AND 630×28-32 mm PIPES FOR PIPELINES OF BOILER UNIT INERMEDIATE STEAM SUPERHEATING FROM ESR "690×bh590×3300-3500", "700×bh580×3200±50" AND "720×bh600×3200±50" mm SLEEVES AND HOLLOW INGOTS | 2012 |
|
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| PILGER MILL ROLL FOR HOT ROLLING OF 610×28-40 mm PIPES | 2013 |
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| 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 |
|
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| ROLL OF PILGER MILL FOR ROLLING OF HEAVY-WALL 630×56 mm PIPES OF HARDLY-DEFORMED STEEL AND ALLOY GRADES FOR NUCLEAR POWER PRODUCTION STRUCTURES FROM ESR SLEEVES AND HOLLOW INGOTS SIZED TO 690-720×70-90×3400 mm | 2013 |
|
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| PLANT FOR PRODUCTION OF TAPERED LONG-SIZED HOLLOW METAL PARTS | 2013 |
|
RU2545935C2 |
