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针对扁挤压筒在周期性的高温、高压、高摩擦的严酷工况下工作,因几何形状的不完全对称造成应力分布极不均匀,容易开裂的问题,提出一种在扁挤压筒内衬上开通孔等效等壁厚的方式来减弱应力集中现象.由ANSYS有限元软件分析得出,与传统的扁筒设计结构相比,可使危险部位的工作应力降低12.1%.对优化后的扁挤压筒进行疲劳分析后可知,扁挤压筒累积使用系数为0.973 24<1,故优化设计后的扁挤压筒满足疲劳强度的要求.
Aiming at the problem that the flat extrusion cylinder works under the severe conditions of high temperature, high pressure and high friction periodically, due to the incomplete symmetry of the geometric shape, the stress distribution is extremely uneven and easy to crack, And the equivalent wall thickness of the through hole is used to reduce the stress concentration.Analysis by ANSYS finite element software shows that the working stress of the dangerous part can be reduced by 12.1% Of flat extrusion cylinder fatigue analysis shows that the cumulative use of flat extrusion cylinder coefficient of 0.973 24 <1, so the optimized design of the flat extrusion cylinder to meet the fatigue strength requirements.