Dimensional analysis is performed as a method to evaluate the characteristics of superplastic forming processes. The analysis is focused on the forming time results from superplastic free bulge tests so that an estimator for the forming time is obtained based on dimensionless parameters. The dimensional analysis is performed by applying the normalisation to the dynamic equations and their corresponding boundary conditions, from which five dimensionless parameters are obtained. Particular conditions of the tests allow to reduce the parameters to two. This preliminary study of the applicability of the dimensional analysis on superplastic forming processes will guide for further steps in which this technique may help during the initial stages of the process layout.

尺寸分析是一种评估超塑性成形过程特性的方法。分析的重点是超塑性自由膨胀试验的成形时间结果，以便基于无量纲参数获得成形时间的估计量。量纲分析是通过对动力学方程及其相应的边界条件应用归一化来进行的，从中获得五个无量纲参数。测试的特定条件允许将参数减少到两个。对超塑性成形工艺尺寸分析适用性的初步研究将指导进一步的步骤，在这些步骤中，该技术可能在工艺布局的初始阶段有所帮助。