散热器加水口盖壳缩径模设计难点是对称凸耳成形及内弯后脱取工件困难。
The difficulty in designing the necking die for water_adding entry lid shell of radiator was the stripping of the part after the forming and in_bending of symmetrical protruding ear.
得出了平面内弯曲变形对压弯构件弯扭屈曲的影响形式，这一形式可用统一的弯矩附加系数表达。
The effect of in-plane bending deformation on the lateral_torsional buckling of beam_columns is considered and the effect form, the additional moment factor, is obtained.
采用扫描电镜进行断口分析，结果表明，零件内弯处外表面上的冲压伤痕是导致其早期疲劳断裂的主要原因。
The fracture surface was inspected by SEM. The results showed that the stamping damage on the surface around the inside bend was the main factor to cause the early fracture.
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