FIELD: metal forming.
SUBSTANCE: invention relates to metal forming and can be used in production of welded pipes of flexible edges of sheet simultaneously on both sides of flat rolled products. Initial workpiece is positioned with centring rollers and stepped edge bending along the entire length from both sides simultaneously. Prior to step-by-step bending, flatness of sheet billet and thickness of edges are measured. Said measurements are carried out before and after bending at each step. Step and distance between deforming tools are corrected taking into account obtained measurements.
EFFECT: upgraded quality of welded pipes.
3 cl, 3 dwg, 2 tbl
| Title | Year | Author | Number |
|---|---|---|---|
| METHOD OF LARGE-DIAMETER PIPES STEP MOLDING | 2018 |
|
RU2702666C1 |
| PIPE EXPANSION METHOD | 2019 |
|
RU2763079C2 |
| METHOD FOR PRODUCTION OF WELDED LONGITUDINAL PIPES OF LARGE DIAMETER FOR MAIN PIPELINES | 2017 |
|
RU2660464C1 |
| PRODUCTION OF LARGE-DIAMETER WELDED TUBES | 2011 |
|
RU2486981C1 |
| METHOD OF PRODUCING LARGE-DIAMETER LONGITUDINAL WELDED PIPES | 2014 |
|
RU2571298C2 |
| DEVICE FOR BENDING EDGES OF SHEET WORKPIECES | 2023 |
|
RU2809059C1 |
| METHOD FOR MANUFACTURING ELECTRIC-WELDED PIPES WITH A DIAMETER OF 508 TO 1422 MM AND A WALL THICKNESS OF 6 TO 20 MM FROM AUSTENITIC STEEL GRADES | 2022 |
|
RU2787204C1 |
| METHOD FOR MAKING WELDED CLOSED SECTIONS | 0 |
|
SU1764907A1 |
| DIE FOR BENDING PARTS FROM SHEET BLANKS | 0 |
|
SU1291235A1 |
| METHOD FOR PRODUCING LARGE-DIAMETER LONGITUDINAL WELDED PIPES | 2020 |
|
RU2756090C1 |
