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    • 92. 发明专利
    • Pipe material manufacturing device, pipe material manufacturing method, and pipe material
    • 管材材料制造装置,管材材料制造方法及管材
    • JP2012240084A
    • 2012-12-10
    • JP2011112537
    • 2011-05-19
    • Univ Of Electro-Communications国立大学法人電気通信大学Lixil Corp株式会社Lixil
    • MURATA MAKOTOKUBOKI TAKASHIMOROI TSUTOMU
    • B21C25/02B21C23/08
    • B21C37/207B21C23/10B21C23/147B21C25/02B21C37/30B21C47/12B29C47/0023B29C47/12B29C47/20B29C47/54
    • PROBLEM TO BE SOLVED: 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.SOLUTION: 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.
    • 要解决的问题:提供一种能够通过简单的机构以高挤压力进行挤出的管材制造装置,能够使形成在管内表面的螺旋形突出部的扭转角更大 并且还提供一种管材制造方法和管材。 解决方案:管材制造装置10设置有模具16,该模具16设置在坯料12的挤出方向F侧,并且形成有通孔22,以及插入部34,其通过 穿过通孔22,使得其顶端在挤出方向侧上比通孔22更多地延伸。插入部34设置在放置在坯料容纳空间S内的浮动模30上,形成间隙 在通孔22的内周与插入部34的外周之间形成螺旋槽40,在插入部34的侧面形成有螺旋状的槽40,在坯料12形成的管材P被挤压时 从该间隙形成,在管材的内表面侧形成有螺旋状的突出部。 版权所有(C)2013,JPO&INPIT