| 摘要 |
FIELD: manufacture of tubular articles, mainly drilling pipes with threaded ends. ^ SUBSTANCE: method comprises steps of fixing one part; rotating other part and simultaneously applying to it axial effort for placing internal burr in turning formed in sleeve of one part; selecting diameter of turning equal to (0.8 - 0.95) of inner diameter of welded joint; setting length of turning and thickness of sleeve wall equal to (1.6 - 4.0) and (0.25 - 0.50) respectively of thickness of wall of welded joint. Due to selecting such parameters, at welding process self-tempering of welded joint is provided and there is no need in additional operations for heat treatment of welded joint. ^ EFFECT: improved quality of welded joint. ^ 2 dwg, 1 ex |
