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Optimization of Conditions of Forming Quality for Hot-press-formed Lower Control Arm Using Finite Element Analysis  

Son, Hyun-Sung (Metal Forming Research Group, POSCO Technical Research Laboratories)
Choi, Byung-Keun (Metal Forming Research Group, POSCO Technical Research Laboratories)
Publication Information
Transactions of the Korean Society of Automotive Engineers / v.19, no.1, 2011 , pp. 45-50 More about this Journal
Abstract
Hot-Press-Forming (HPF), an advanced sheet metal forming method using stamping at a high temperature of about $900^{\circ}C$ and quenching in an internally cooled die set, is one of the most successful forming process in producing crash-resistant parts such as pillars and bumpers with complex shape, ultrahigh strength, and minimum springback. To optimize conditions of a forming quality in HPF process and secure a safe product without any failures, such as fractures and wrinkling, the simulations based on the coupled thermo-mechanical analysis for a hot-press-formed lower control arm are applied with Taguchi's orthogonal array experiment. Three factor variables - the friction coefficient, blank shape, and hole location for burring - are selected to be optimized. The most effective condition of a forming quality for a hot-press-formed lower control arm is suggested. The simulation results are confirmed with experimental ones.
Keywords
Hot-Press-Forming(HPF); Taguchi's orthogonal array experiment; Coupled thermo-mechanical analysis; Lower control arm;
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