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Influence of Heat-treated Condition and Process Sequences on the Springback of Aluminum Bent Profiles
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    Abstract:

    Methods in numerical simulation combined with experiments were used to study the influence of heat-treated condition and process sequences on the springback of 6063 aluminum bent profiles. The results show that the inner and outer materials of profile cross-section during bending process suffer compressive and tensile stress, while the nearby neutral fiber suffers an obvious tensile-compressive stress concentration. The neutral fiber of the whole plastic deformation region has a larger residual tensile stress after unloading. The springback angle of extruded profile increases after artificial aging. With the increase of artificial aging time, the difference of maximum tensile and compressive stress between the inner and outer materials increases, and consequently, the springback angle gradually increases. The curved profile also rebounds after artificial aging and electrophoresis paint, and with the increase of the bending angle, the springback angle increases. The artificial aging time further increases, but the rebound angle of curved profile remains unchanged. The total springback angle is minimum when the extruded profile is first processed by cold bending, and then by artificial aging and electrophoresis painting.

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  • Online: July 23,2014
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