抄録
A new concept of "friction-assisted extrusion" to produce a thin metal strip was proposed. In this 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 exerting a high friction force over the anvil surface. Very thin strips of aliminum up to about 15μm in thickness could be formed up to the extrusion ratio R-667 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 approach analysis. The friction-assisted extrusion process was applied to a forming of thin strips from aluminum powder. The thin strips formed from the aluminum powder have superior mechanical properties to those formed from bulk aluminum materials.
