PURPOSE: To continuously obtain a welding metal pipe of good quality in a simplified process by continuously slitting a metal thin metal strip obtd. by solidifying it by rapid cooling with a twin-roll cooling method in the specified width and welding following pipe making.
CONSTITUTION: A molten metal 1 is poured uniformly in the width direction of the molten pool of cooling rolls 4, 4' via a tundish 2 and nozzle 3. At this time, the solidifying speed of a metal thin strip end is controlled by preheating a side plate 5. The molten metal 1 is rapidly cooled by the cooling rolls 4, 4' to produce a solidified shell 6 and drawn downwards as well and becoming of the thin metal strip 7 having uniform plate thickness distribution. This thin strip 7 is made in a black strip in the specified width by subjecting to a slit cutting in the specified width continuously by the rotary blade 10 for slitting of a slit line, this is subjected to pipe making by a pipe making roll 14 and a continuous pipe is made with TIG welding with upsetting by a welding roll 15. After welding it is passed through a roll 16 for straightening to constant diameter and made a product after executing heat treatment.
TOGE TAKEYA
AMANO KAGEHIRO
| JPS5575861A | 1980-06-07 | |||
| JPS5575862A | 1980-06-07 | |||
| JPS5577962A | 1980-06-12 | |||
| JPS57124554A | 1982-08-03 | |||
| JPS512666A | 1976-01-10 |
Next Patent: METHOD FOR FORMING COLLECTING PIPE