超塑气胀构件可成形性判据的数学模型

MATHEMATIC MODEL FOR FORMABILITY CRITERIA OF SUPERPLASTIC AIR BULGING COMPONENTS

本文在研究金属薄壳构件超塑气胀成形时,提出两种贴模方式(内填模型和外包模型)与四个判据的关系。同时建立一超塑气胀可成形性判据数学模型: Q_w=1.56(WS)/(HF)+2.37(θ-φ)π/(180)-r/r_0+0.19 Q_W≥1者可成形性好,Q_W<1者可成形性差。试验证明,上式判定构件可成形性有较高的准确性。

A proposal for two types of press close to die, Including blanks coming in dieand covering die, and four criteria for mability is put forward in the study of the superplasticair bulge forming of the metallic thin wall components. A dimensionless weigh mathematicmodel for the criteria of superplastic air bulge forming was developed to be: Q_w=1.56WS/HF+2.37(θ-φ)π/180-r/r_0+0.19The superior formability of components is approaching if Q_W≥1, and the worse, if Q_W<1. Itwas confirmed by practice that the above mentioned model is with more accuracy.