FIELD: rolled tube production, possibly manufacture of seamless hot rolled tubes in lines with pilger rolling mills. SUBSTANCE: method comprises steps of realizing last deformation of pilger head before extracting mandrel out of underrolled sleeve-tube at feed exceeding by 2.0 -2.5 times preset feed value; removing sleeve-tube from mandrel by means of mandrel ring by value l ≥0,2 μ + 0.4, where l - length of removed part of mandrel, m; μ - elongation factor. Invention provides complete afterrolling of pilger heads on free mandrel. EFFECT: stable rolling process, lowered metal consumption, enhanced efficiency of rolling mill.
| Title | Year | Author | Number |
|---|---|---|---|
| METHOD FOR PRODUCING HOT ROLLED SEAMLESS TUBES FROM FORGED OR CONTINUOUSLY CAST BILLETS, ELECTROSLAG REFINING INGOTS IN TUBE ROLLING AGGREGATES WITH PILGER MILLS | 2004 |
|
RU2276625C2 |
| 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 |
| METHOD FOR PRODUCING HOT ROLLED CONVERSION LARGE- AND MEAN-DIAMETER TUBES OF HARD-TO-FORM STEELS AND ALLOYS IN TUBE ROLLING PLANTS WITH PILGER MILLS | 2004 |
|
RU2278750C2 |
| PRODUCTION OF 550×25-30 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 | 2014 |
|
RU2570152C2 |
| METHOD FOR PRODUCTION OF BAR-INGOTS BY ELECTROSLAG REMELT FROM ALLOYED AND LOW-ALLOYED STEEL GRADES, ROLLING OF COMMERCIAL AND CONVERSION PIPES OF LARGE AND MEDIUM DIAMETERS ON TUBE-ROLLING PLANTS WITH PILGER ROLLING MILL | 2006 |
|
RU2346765C2 |
| 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 |
| METHOD FOR PRODUCING BY ELECTROLAG REFINING INGOT-BLANKS OF HARD-TO-FORM STEELS AND ALLOYS AND FOR ROLLING OF THEM COMMERCIAL TUBES OF LARGE AND MEAN DIAMETERS IN TUBE ROLLING PLANTS WITH PILGER MILLS AND CONVERSION TUBES FOR FURTHER REROLLING IN TUBE COLD ROLLING MILLS | 2006 |
|
RU2322317C2 |
| METHOD FOR PRODUCTION OF SEAMLESS HOT-DEFORMED BOILER THICK-WALLED PIPES WITH SIZE OF 465×75 mm IN PIPE-ROLLING PLANTS WITH PILGER MILLS FOR PIPELINES OF HEAT COAL BLOCKS WITH SUPERCRITICAL STEAM PARAMETRES | 2006 |
|
RU2386502C2 |
| 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 |
| METHOD FOR MAKING TUBES OF HARD-TO-FORM KINDS OF STEELS AND ALLOYS WITH INCREASED LINEAR EXPANSION FACTOR | 2002 |
|
RU2221656C2 |
