| 摘要 |
A tube expanding drum machine, comprising a support frame (2), at least one drum (3) rotatably supported in said frame (2), rotation means of said drum (3) about its axis, a flexible pipe-expanding shaft (6) wound on said drum (3) and having a first end (7) fixed to said drum (3), an expanding mandrel (8) or a shaped ogive (58), connected to the second end (9) of said flexible pipe-expanding shaft (6), suitable for widening the diameter of a pipe (10) by winding or unwinding said flexible pipe-expanding shaft (6) onto or from said drum (3) inside the pipe (10) itself. The machine comprises automatic lubrication means (11) of the inner surface of the pipe (10) during the pipe expansion foreseen inside said flexible shaft (6). |
