To provide a pipe material manufacturing device that can carry out extrusion with a high extrusion force by a simple mechanism and can make the torsion angle of a spiral shaped protruding part formed on the inside surface of a pipe larger and also to provide a pipe material manufacturing method and pipe material.
A pipe material manufacturing device 10 is provided with a die 16, which is provided on the extrusion direction F side of a billet 12 and in which a through-hole 22 is formed, and an insertion part 34, which passes through the through-hole 22 so that the tip of which extends more on the extrusion direction side than the through-hole 22. The insertion part 34 is provided on a floating die 30 placed inside a billet accommodating space S, and a gap is formed between the inner circumference of the through-hole 22 and the outer circumference of the insertion part 34. A spiral groove 40 is formed in the side surface side of the insertion part 34, and when a pipe material P formed by the billet 12 being extruded from this gap is formed, a spiral shaped protruding part is formed on the inside surface side of the pipe material.
| JP2005000993 | NON-AXIAL SYMMETRIC TWIST-EXTRUDING METHOD FOR MATERIAL |
| JP5641833 | Extruded die |
KUBOKI TAKASHI
MOROI TSUTOMU
LIXIL CORP
| JP2009220153A | 2009-10-01 | |||
| JPH10166036A | 1998-06-23 | |||
| JPS59209430A | 1984-11-28 | |||
| JP2000005809A | 2000-01-11 |
Shunichi Takahashi