FIELD: tube rolling processes and equipment.
SUBSTANCE: method comprises steps of heating billet, piercing them to sleeve and subsequent rolling of sleeve in roll grooved passes formed by driven rolls, guiding tool and plug. According to invention operation wear of rolls is controlled due to matched selection of piercing and rolling out conditions performed by the same rolls. Billets are pierced and rolled out alternatively in the same rolls in such a way that cross section of deformation zone corresponding to billet guiding between rolls at piercing and cross section of deformation zone corresponding to beginning of contact deformation of sleeve wall between rolls and plug at rolling out process are spaced one from other along deformation zone by value consisting of 0.4 - 0.6 of sleeve diameter.
EFFECT: reduced consumption of rolls for conversion, increased time period of rolls operation between their changes for regrinding, shortened time period of total idle periods at screw rolling of tubes.
2 cl, 1 dwg, 1 ex
| Title | Year | Author | Number |
|---|---|---|---|
| MANUFACTURING METHOD OF BUSHINGS CROSS-SCREW ROLLING MILL | 2008 |
|
RU2378062C1 |
| METHOD OF SEAMLESS TUBE PRODUCTION | 2011 |
|
RU2455092C1 |
| PRODUCTION OF SEAMLESS HOT-ROLLED PIPES SIZED TO 610×28-32 mm FROM "15Х1М1Ф"- AND "10Х9МФБ-Ш"-GRADE STEELS AT PRU 8-16'' WITH PILGER MILLS FOR PIPELINES OF BOILER UNIT STEAM INTERMEDIATE OVERHEATING WITH HIGHER MECHANICAL PROPERTIES | 2012 |
|
RU2523394C1 |
| METHOD OF TUBE SCREW ROLLING AND MILL TO THIS END | 2009 |
|
RU2416474C1 |
| METHOD OF HOT-ROLLED PIPE PRODUCTION | 2012 |
|
RU2489221C1 |
| PRODUCTION TOOL OF SKEWED-ROLL PIERCING MILL | 0 |
|
SU716655A1 |
| METHOD FOR REGRINDING ROLLS OF SCREW ROLLING MILL | 2022 |
|
RU2807154C1 |
| TECHNOLOGICAL TOOL FOR SKEW-ROLL PIERCER | 0 |
|
SU749469A1 |
| METHOD OF PRODUCTION OF THIN WALL PIPES AT PIPE-ROLLING PLANTS WITH THREE-ROLL REELER | 2013 |
|
RU2556164C1 |
| METHOD OF ROLLING PIPE WORKPIECES | 2019 |
|
RU2722952C1 |
