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对某异型铝型材H13钢挤压模具分流桥早期开裂失效的状况,采用Deform-3D软件分析并进行正交优化试验设计。结果表明,当挤压温度为460℃、挤压速度为30 mm·s-1、摩擦因子为0.6和模具预热温度为450℃时,坯料塑性最差、变形抗力及流动阻力最大,模具主应力超过材料许用应力值导致模具开裂失效。优化挤压温度为500℃、挤压速度为10 mm·s-1、摩擦因子为0.4和模具预热温度为470℃时,模具的最大主应力仅为529 MPa,能够最大可能地避免模具早期的开裂失效。
Deform-3D software was used to analyze the early cracking failure of a profile aluminum alloy H13 steel extrusion die shunt. The orthogonal experiment design was used. The results show that when the extrusion temperature is 460 ℃, the extrusion speed is 30 mm · s-1, the friction factor is 0.6 and the mold preheating temperature is 450 ℃, the plasticity of the billets is the worst, and the deformation resistance and the flow resistance are the highest. Exceeding the allowable stress value of the material leads to failure of the mold cracking. Optimum extrusion temperature of 500 ℃, the extrusion speed of 10 mm · s-1, the friction factor of 0.4 and the mold preheating temperature of 470 ℃, the maximum principal stress of the mold is only 529 MPa, to the greatest extent possible to avoid early mold Cracking failure.