低压铸造铝合金轮毂铸型壁厚与铸件壁厚的关系

Relationship between Mould Wall Thickness and Wheel Wall Thickness in Low Pressure Casting Aluminum Alloy Wheel

依据数学理论和低压铸造原理,提出模具壁厚和铸件壁厚存在着δt/h=3λ/2cλw的比例关系时,液态金属流过铸型表面才能达到最大的温度梯度。低压铸造铝合金轮毂热节处δt/h=1.8～2.2时,有利于轮辋的补缩和热节处的凝固。通过实际生产和有限元模拟分析对铸型壁厚与铸件壁厚的上述关系进行了验证。

Based on mathematical principle and low pressure casting principle, when function relation between mould wall thickness and wheel wall thickness is δth=32λcλw, liquid metal can obtain the maximum temperature gradient on the mould surface. When δth is 1.8～2.2 at hot spot of low pressure casting aluminum alloy wheel, it is beneficial for rim feeding and solidification of hot spot, which is effectively verified by practical production and FEM analysis.