成形機の構造を考慮したダイカスト金型の変形解析手法

概要

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The deflection of a die in high-pressure die-casting (HPDC) strongly influences the quality of HPDC parts. The dimensional accuracy is the most important point. This research developed a method to estimate the die deflection in HPDC using FFM computer simulation. First, the effect of the distortion of the die-casting machine on the deflection of the die-insert was evaluated. It is possible to partly evaluate the deflection of the di-insert without installation in the die-casting machine. However, an actual distortion measurement of the die-insert demonstrated that the calculation including the die-casting machine can precisely evaluate the die-insert distortion. Second, the thermal distortion of the die was taken into consideration. A FDM flow and solidification simulation calculated the temperature distribution of the die-insert. The calculated distribution was confirmed to correspond to the actually measured temperature distribution. Finally, the deflection of the die-insert caused by the die-clamping as well by the thermal distortion was simulated. It was found that the calculated deflection well coincides with the actually measured strain value. From these steps, it was clarified that the computer simulation on the HPDC system including the structural machine can precisely evaluate the deflection of the die-insert.
一般社団法人日本機械学会の論文