FIELD: metallurgy.
SUBSTANCE: proposed method comprises heating of ingots and billets to ductility temperature and their transfer on roll-table. They are fed to mill trough and fed to working zone. The latter is composed by working and guide rolls or blades. Then, piercing is made at short mandrel as well as rolling. Ruled out formation of "triangles", higher efficiency and lower metal input are ensured by executing said piercing at guide and working rolls or blends with axes located in vertical plane. Ingots-billets are fed to the mill by lifting mechanism while to working zone they are fed by gravity. Ingots-billets are pierced to make their end approach piercing cone with dam. At rolling, they are stretched by their weight. Note here that produced sleeves are fed to vertical roll-table that changes over to horizontal roll-table.
EFFECT: lower power consumption at piercing ingots-billets weighing 3-10 tons at helical rolling mills.
| 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 |
| 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 |
| 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 |
| PRODUCTION OF SEAMLESS HOT-ROLLED 550×25 mm PIPES AT 8-16" PRU WITH PILGER MILLS | 2012 |
|
RU2547973C2 |
| 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 530 MM AND 550 MM DIAMETER PIPES AT PRU WITH PILGER MILLS FOR STEAM BOILERS, STEAM LINES AND MANIFOLDS OF UNITS OPERATING WITH HIGH AND SUPERCRITICAL PARAMETERS OF STEAM | 2013 |
|
RU2545952C2 |
| PRU WITH PILGER MILLS FOR ROLLING OF SEAMLESS HOT-ROLLED 273-630 mm-DIA PIPES | 2013 |
|
RU2533614C1 |
| 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 |
|
RU2522514C1 |
| METHOD OF FABRICATION OF SEAMLESS HOT-ROLLED PIPES 530(17-60, 550(25-60, 610(32-50 AND 630(32-60 MM OUT OF FORGED, CONTINUOUSLY CAST BILLETS, INGOTS AND HOLLOW INGOTS OF ELECTROSLAG REMELTING PROCESS AT PIPE-ROLLING UNIT 8-16" WITH PILGER MILLS OF JSC CHTPZ | 2013 |
|
RU2550035C2 |
| 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 |
|
RU2527523C2 |
