The matters of attention in the hot forming pipe expanding machine production
The matters of attention in the hot forming pipe expanding machine production:
(1) thermal expansion, the two steel pipe butt to flat, before expanding system;
(2) large diameter hot forming pipe expanding machine adopts medium frequency heating, hole enlargement process with the hydraulic drive system, hydraulic test, on-line ultrasonic testing, eddy current flaw detection, comprehensive detection means such as physical and chemical test, to ensure the reliability and stability of the quality;
(3) the heat tube interchanged in early after straightening cutting head to tail, simply remove reducing and empty section and the tail cracking part, don't cut, flat end face as long as the guarantee. |
