FIELD: processes and equipment for helical rolling of billets.
SUBSTANCE: method comprises steps of feeding heated blank to grooved pass restricted by rolls turned by feed angle and guiding liners; deforming blank by means of rolls and piercing it by means of mandrel. Piercing is performed at periodical outer cooling and constant inner cooling of liners by means of water flow through inner cavities of liners. Size of cavities of liners is normalized.
EFFECT: improved quality and accuracy of geometry sizes of sleeves and of inner and outer surfaces of articles due to enhanced strength of guiding liners.
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| Title | Year | Author | Number |
|---|---|---|---|
| METHOD OF HELICAL ROLLING OF BILLET INTO SLEEVE | 2020 |
|
RU2735436C1 |
| PIERCING MILL BAR | 2016 |
|
RU2630188C1 |
| ROTARY PIERCER WORKING TOOLS | 2012 |
|
RU2496590C1 |
| METHOD FOR HELICAL PIERCING OF CAST BILLET | 2004 |
|
RU2250147C1 |
| METHOD OF HELICAL PIERCING OF CAST BILLET | 2012 |
|
RU2489220C1 |
| METHOD OF MANUFACTURING SEAMLESS PIPES WITH A DIAMETER LESS 120 mm SCREW ROLLER | 2017 |
|
RU2635207C1 |
| COOLED MANDREL OF ROTARY MILL AND METHOD OF ITS COOLING | 2014 |
|
RU2568805C1 |
| HELICAL PIERCING METHOD | 2004 |
|
RU2288056C2 |
| 0 |
|
SU549183A1 | |
| SLEEVE PRODUCTION METHOD | 2003 |
|
RU2245751C1 |
