Gas press welding method of steel pipes |
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| 申请号 | JP23123382 | 申请日 | 1982-12-31 | 公开(公告)号 | JPS59125287A | 公开(公告)日 | 1984-07-19 |
| 申请人 | Nippon Steel Corp; | 发明人 | ISHIKAWA YASUSHI; TACHIKAWA HIROSHI; UMADA TOYOAKI; | ||||
| 摘要 | PURPOSE:To form a joint part having good quality in the stage of heating and joining the joining end part of steel pipes by forming a gaseous flame for heating into a flame richer in oxygen than a neutral flame and melting the joining part thereby joining said part with upsetting. CONSTITUTION:Steel pipes 1, 2 to be joined are respectively clamped by a movable clamp 5 which is movable by a hydraulic cylinder 6 and a stationary clamp 4. A ring burner 7 is disposed around the joining part 8 of both pipes 1, 2 and gaseous C2H2 and O2 for heating are supplied to the burner 7 through a hose 13 to generate a flame in a nozzle 14 and to heat the part 8. The feed rate of C2H2 and O2 is regulated in this stage to make the flame richer in oxygen than a neutral flame to melt the part 8 and thereafter said part is upset quickly by the clamp 5 and is thus joined. The joint having good quality is formed in a shorter stage and required time. | ||||||
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| 说明书全文 | |||||||
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