FIELD: metallurgy.
SUBSTANCE: method includes blanks and ingots-blanks of electroslag melting heating to plasticity temperature, blanks and ingots-blanks of electroslag melting piercing to shell-blanks, shell-blanks heating from cold or hot charging to plasticity temperature, shell-blanks piercing-rolling to shells in barrel-shape rollers having input and output cones and cylindrical part with screw thread. The input cone contains a guide cone and piercing cone in form of a cone of initial and secondary clamping with angles 3° and 10°, respectively, and output cone contains reeling mandrel with angle 6°, cylindrical part and cone part of shell exit from rollers with angle 3°. Piercing-rolling is performed in rollers, which length of screw thread LT of the cylindrical part is determined by the mathematical expression.
EFFECT: increased accuracy of shells wall, reduced metal consumption coefficient.
1 tbl
| Title | Year | Author | Number |
|---|---|---|---|
| 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-STRAINED MACHINED 610×36,53×3200-3550 mm PIPES FROM "08Х18Н10Т-Ш" GRADE STEEL FOR NUCLEAR POWER PRODUCTION | 2013 |
|
RU2535251C2 |
| CROSS-SCREW-ROLLING MILL PROCESS TOOL FOR PIERCING-ROLLING-OFF OF LARGE-DIAMETER ELECTROSLAG-REMELTING SLEEVE BLANKS AND HOLLOW INGOTS FROM ALLOYED HARDLY-DEFORMED GRADES OF STEEL AND ALLOYS | 2012 |
|
RU2527582C2 |
| CROSS-SCREW-ROLLING MILL PROCESS TOOL FOR PIERCING-ROLLING-OFF OF LARGE-DIAMETER ELECTROSLAG-REMELTING SLEEVE BLANKS AND HOLLOW INGOTS FROM ALLOYED HARDLY-DEFORMED GRADES OF STEEL AND ALLOYS | 2012 |
|
RU2517068C1 |
| METHOD OF PIERCING OF INGOTS AND BILLETS WEIGHING FROM 3 TO 10 TONS TO SLEEVES AT HELICAL ROLLING MILL | 2012 |
|
RU2523402C1 |
| PRODUCTION OF 426×90 MM SEAMLESS HOT-ROLLED PIPES FOR STEAM BOILERS, STEAM PIPELINES AND MANIFOLDS OF PLANTS WITH HIGH AND SUPERHIGH STEAM PARAMETERS OF "10Х9МФБ-Ш"-GRADE STEEL AT PRU 8-16'' WITH PILGER MILLS | 2013 |
|
RU2537639C1 |
| ESR BLANK-INGOT FOR PIERCING AND ROLLING-OFF AT TWO-ROLL SCREW ROLLING MILL TO REROLLED SLEEVES-BLANKS FOR PRODUCTION OF MACHINED 610×36,53×3200-3550 mm PIPES FROM "08X18H10T"-GRADE STEEL FOR NUCLEAR POWER ENGINEERING STRUCTURES | 2013 |
|
RU2530430C1 |
| PRODUCTION OF COMMERCIAL AND REROLLED PIPES AT PRU WITH PILGER MILLS FROM FORGED OR HOLLOWS ESR INGOTS-BILLETS FROM ALLOYED HARDLY-DEFORMED STEELS AND ALLOYS AND TITANIUM-BASED STEELS | 2013 |
|
RU2542156C2 |
| PRODUCTION OF 465×75 MM SEAMLESS HOT-ROLLED PIPES FOR STEAM BOILERS, STEAM PIPELINES AND MANIFOLDS OF PLANTS WITH HIGH AND SUPERHIGH STEAM PARAMETERS FROM ESR INGOTS OF "10Х9МФБ-Ш"-GRADE STEEL | 2012 |
|
RU2527587C2 |
| ROLLER OF HELICAL ROLLING MILL | 2013 |
|
RU2554246C1 |
