FIELD: process engineering.
SUBSTANCE: invention relates to rolling, particularly to production of bent section, namely rectangular welded closed sections. Proposed method comprises roll forming of rectangular workpiece with drawing in seam reduction section, high-frequency welding with preset angle of closing edges convergence angle and preset angle of flange closing. Workpiece drawing is performed in seam reduction section. Note that drawing makes 1.008-1.0095, angle of closing edges convergence makes 2.0-2.5°, and flanges closing is made at 174-176°.
EFFECT: higher quality of welded closed rectangular sections, higher process efficiency.
1 tbl, 1 ex, 2 dwg
| Title | Year | Author | Number |
|---|---|---|---|
| ELECTRICALLY WELDED STRAIGHT-SEAM TUBE MAKING METHOD | 2002 |
|
RU2240882C2 |
| METHOD FOR MAKING WELDED CLOSED SECTIONS | 0 |
|
SU1764907A1 |
| METHOD OF MAKING CLOSED SHAPES WITH RECTANGULAR CROSS SECTION AND WITH CONNECTION LINE ON FLAT SURFACE OF ONE OF ITS FLANGES FROM SHEET MATERIAL | 1992 |
|
RU2042449C1 |
| METHOD AND APPARATUS FOR MANUFACTURING SPIRALLY-WELDED TUBES | 0 |
|
SU1426666A1 |
| MILL FOR MAKING WELDED CLOSED SECTIONS | 0 |
|
SU1754262A1 |
| METHOD OF PRODUCING WELDED SHAPED TUBES | 2010 |
|
RU2443486C1 |
| METHOD OF PRODUCING SPIRAL-TUBES OF LARGE DIAMETER | 0 |
|
SU1069899A1 |
| METHOD FOR MAKING ELECTRICALLY WELDED STRAIGHT -SEAM TUBES | 2002 |
|
RU2232655C1 |
| METHOD OF PRODUCING HELICAL-SEAM TUBES | 0 |
|
SU893283A2 |
| WELDING UNIT OF MILL FOR PRODUCING WELDED STRAIGHT-SEAM TUBES | 0 |
|
SU902889A2 |
