2019 Volume 60 Issue 2 Pages 316-321
The capillary shaping is one of the most attractive options for the fabrication of aluminum frame components of a light weight car body structure. In this study, the maximum pulling rate of a pure aluminum fabricated by this technique was investigated using heat transfer analysis. Numerical and theoretical methods were applied to consider various cooling conditions. The maximum pulling rate depends on h/b, where b is the thickness of a product and h is the heat transfer coefficient between the coolant air and product. The maximum pulling rate increases with increasing h/b and decreasing melt temperature. Critical cooling length, which contributes to increased pulling rate, is smaller than 100 mm and decreases with increasing h/b.
This Paper was Originally Published in Japanese in J. JFS 89 (2017) 631–637.