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通过分析圆筒件再拉深变形过程,运用主应力法、摩擦理论和板料弯曲理论,推导出极限拉深比的预测公式。对工业纯钛TA1圆筒件进行拉深成形试验,分析了平均厚向异性-R、摩擦系数μ、凹模半锥角α、凹模圆角rd、圆筒件壁厚比tmax/tmin等参数对再拉深性能的影响。结果表明:拉深试验预测值与实验结果相符合,极限拉深比随着平均厚向异性-R的增加呈线性增加,但随着摩擦系数μ、圆筒件壁厚比tmax/tmin的增加呈线性减小。
The prediction formula of the ultimate draw ratio is deduced by analyzing the process of deep drawing and deforming of the cylinder and using the principal stress method, the friction theory and the sheet bending theory. The drawing test of industrial pure titanium TA1 was carried out. The average anisotropy R, friction coefficient μ, half cone angle α, die radius rd, wall thickness ratio tmax / tmin and so on Influence of Parameters on Deep Drawing Performance. The results show that the prediction values of the deep drawing test are in good agreement with the experimental results, and the ultimate drawing ratio increases linearly with the increase of the average anisotropy-R. However, with the increase of the friction coefficient μ and the wall thickness ratio of the cylinder member tmax / tmin Linear decrease.