| 摘要 |
<p>A manufacturing device for heating tube with internal grooves, comprising a fin rolling roll (24) and a supporting roll (26) rolling a W-shaped fin (2) by sandwiching and rolling a metal strip material (T) by these rolls, a plurality of forming rolls (30) for forming the fin (2)-formed strip material in tubular shape so that the fin (2) is positioned on the inner peripheral side, and welding mechanisms (32, 34, 36) for welding both edges of the strip material formed in tubular shape after heating and butting, the fin rolling roll (24) further comprising a plurality of segment rolls (24B) to (24E) disposed coaxially with each other and having outer peripheral surfaces in which fin rolling grooves (25) are formed, these segment rolls being connected divergently with each other.</p> |
