To provide the tube extrusion device to produce a high precision bent tube and straight tube.
An expanding plug (working plug) is arranged oscillatable to the front end of a mandrel. By pushing a tube stock P externally fitted to the mandrel with a pressure ram, the tube stock P is expanded by the expanding plug. The expanded tube stock P is guided by a guide means 20. The guide means 20 has a main roller 21, a pair of regulating rollers 22, 23 and an auxiliary roller 24, by these rollers, a guide space G to guide the tube stock P is formed. Rotating axis lines L2, L3 of a pair of the regulating rollers 22, 23 are orthogonally crossed to a rotating axis line L1 of the main roller 21. A rotating axis line L4 of the auxiliary roller 24 is parallel with the rotating axis line L1 of the main roller 21. These regulating rollers 22, 23 and auxiliary roller 24 are adjusted for position corresponding to an outside diameter of the expanded tube stock P.
FUKUSHIMA NOBUNAO
SHIMIZU MASAFUMI
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