2902 平面ひずみ押出し加工実験による微細溝列を設けた工具が製品表面平滑化に及ぼす影響(S31-1 新技術への取り組み,S31 塑性加工技術の動向とその展開)

抄録

Optimum location of the micro-groove arrays formed on the tool surface to have smooth product surface was investigated by carrying out the plane strain extrusion experiments. Pure aluminum A1050 (JIS) was used for the billet, and paraffinic mineral oil was used for the test lubricating oil. The micro-groove arrays of 2mm width were laid perpendicular to the extrusion direction and consisted of three parallel grooves separated 0.72mm interval. The cross section of a groove was u-shape, 0.44mm depth and 0.28mm width. Those groove arrays were machined on the tool surfaces at three different sections. The surface quality of a product could be improved by using the tool on which the micro-groove arrays were formed on the tool surface at inner section near the exit deformation boundary.