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Aluminum extruded profiles have been mostly used only a few automotive parts until now, such as roof rail, sunroof frame and bumper beams. However, Aluminum extruded materials have been being increased in suspension parts, especially, lower control arm. Most of aluminum suspension parts could be obtained by extrusion and stretch bending and forming technology but the cost of production is a bit high due to complex forming process. In this paper, Curvature extrusion technology was applied for cost reduction and higher quality guarantee by removing forming process. It was fabricated curved extruded profile used by curvature extrusion equipment for removing bending process and designed control arm with optimized profile for taking off forming process. For curvature extrusion and excellent quality it was optimized extrusion condition by controlling and combining extrusion speed and traverse moving speed and distance. For check of durability of control arm, it was carried out endurance test and the result was satisfied.

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UCI(KEPA) : I410-ECN-0101-2009-556-015699912