FIELD: plastic working of metal, possibly manufacture of seamless tubes on mandrel in mill with three-roll stands.
SUBSTANCE: method comprises steps of reducing tube material by wall thickness in two last stands of mill; setting relation of length of inner circle of tube material to length of outer circle of mandrel in range 1.07 - 1.17. Calibrating stand is mounted after two last stands of mill. Reduction degree on bottom of grooved pass of rolling roll in calibrating stand is set no less than 5%.
EFFECT: simplified extraction of mandrel, absence of scratches on inner surface of tube material.
12 cl, 7 dwg, 1 tbl, 16 ex
| Title | Year | Author | Number |
|---|---|---|---|
| SEAMLESS TUBE PRODUCING METHOD | 2004 |
|
RU2303497C2 |
| PROCEDURE OF EXTENSION ROLLING AT MILL FOR ROLLING SEAMLESS TUBES ON MANDREL | 2006 |
|
RU2357815C1 |
| METHOD AND APPARATUS FOR CONTROLLING POSITION AT ROLLING WORKING ROLLS OF THREE-ROLL STAND OF MILL FOR ROLLING SEAMLESS TUBES ON MANDREL | 2004 |
|
RU2319564C1 |
| METHOD OF HOT-ROLLED PIPE PRODUCTION | 2012 |
|
RU2489221C1 |
| SEAMLESS TUBE PRODUCTION UNIT | 2011 |
|
RU2483816C2 |
| PROCESS TOOL FOR HELICAL ROLLING | 0 |
|
SU1138197A1 |
| METHOD FOR MANUFACTURING SEAMLESS METAL PIPES | 2020 |
|
RU2793593C1 |
| REDUCING AND STRETCHING ROLLING MILL WITH IMPROVED TOLERANCE OF DIAMETER AND WALL THICKNESS | 2019 |
|
RU2751408C1 |
| METHOD OF CONTINUOUS ROLLING | 2009 |
|
RU2385194C1 |
| METHOD OF SEAMLESS TUBE PRODUCTION | 2011 |
|
RU2455092C1 |
