Development of Friction-Assisted Extrusion Process for Producing Thin Metal Strips.

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  • 金属薄板の摩擦押出し成形法の開発
  • キンゾク ウスイタ ノ マサツ オシダシ セイケイホウ ノ カイハツ

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Abstract

A new concept of "friction-assisted extrusion" to produce a thin metal strip is proposed. In the process, a rectangular prismatic workpiece inserted into the container is compressed by a punch against an anvil, and the anvil is forced to move horizontally. A thin strip can be extruded through the gap by the high friction force over the anvil surface. Very thin strips of aluminium and copper up to about 50 μm in thickness could be formed up to the extrusion ratio R = 200 with a considerably low punch pressure ratio p/2k=1∼2(p : punch pressure, k : yield shear stress), which agreed with the theoretical value estimated by the upper bound method.

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