FIELD: metallurgy.
SUBSTANCE: pipe forming roll has body with round-section path with tangential transverse tapers consisting of hammer section, finishing section, lengthwise taper section and idle section. Optimum reduction of blanks at hammer section is ensured by making the roll body composed of hammer section with central angle of 70° with cross-section decreasing by 74-104 mm depending on ESR sleeve and hollow ingot diameter, finishing section with central angle of 100°, lengthwise taper section with central angle of 40° and idle section with central angle of 150°. Note here that angles of transverse tapers at hammer section from zero point to 20-degrees-central angle are invariable and equal to 35°, at next hammer section with central angle of 50° with transition to finishing section with central angle of 10° they are smoothly decreasing from 35 to 22 degrees, at finishing section with central angle 90° they are invariable and equal to 22°, at lengthwise taper with transition to idle section with central angle of 20° they are smoothly increasing from 22 to 35 degrees, and, further, at idle section with central angle of 130° they are invariable and equal to 35°.
EFFECT: higher precision of seamless hot-rolled 610×28-40 mm boiler pipes from steel grades "12X1МФ", "15Х1М1Ф" and "10Х9МФБ-Ш".
3 cl, 1 tbl
| Title | Year | Author | Number |
|---|---|---|---|
| PILGER MILL ROLL FOR ROLLING 630×28 mm "09Г2С" STEEL FOR GAS PIPES OF GAS LIFT SYSTEMS AND GAS FIELD CONSTRUCTION FROM HOLLOW INGOTS OF ELECTROSLAG REMELTING SIZED TO "720×65×3400±50" mm | 2013 |
|
RU2527828C1 |
| 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 |
|
RU2545932C2 |
| 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 |
|
RU2523379C2 |
| PILGER MILL ROLL FOR HOT ROLLING OF 610(10-40mm-PIPES | 2013 |
|
RU2537342C2 |
| ROLL OF PILGER MILL FOR ROLLING OF THIN-WALL TUBES WITH DIAMETER OF 508 MM WITH INCREASED ACCURACY AS TO WALL | 2013 |
|
RU2542131C1 |
| PILGER MILL ROLL FOR HOT ROLLING OF 530 AND 550 MM THIN-WALL PIPES | 2013 |
|
RU2537637C2 |
| ROLL OF PILGRIM MILL FOR ROLLING OF TUBE STOCKS WITH SIZE 290H11-12 MM FROM LOW-DUCTILE BORON-CONTAINING STEELS OF GRADES 04H14T3R1F-SH AND 04H14T5R2F-SH | 2012 |
|
RU2516148C1 |
| ROLL OF PILGRIM MILL FOR ROLLING OF THIN-WALLED PIPES FROM COLD-RESISTANT AND CORROSION-RESISTANT GRADES OF STEEL | 2012 |
|
RU2516887C2 |
| PILGER MILL ROLL FOR 273-630 MM DIAMETER PIPES ROLLING | 2014 |
|
RU2564503C2 |
| ROLL OF PILGER MILL FOR ROLLING THIN-WALL TUBES | 2005 |
|
RU2294250C2 |
