アルミダイカスト製コネクティングロッドへのかち割り工法適用条件の検討

抄録

In this study, the condition for applying the fracture splitting method to the aluminum alloy die casting connecting rod was investigated. The inside diameter changes in the big end hole after the fracture splitting and the bolt tightening were clarified by FEM analytical results. Then, the effects of the notch shape and the splitting speed on the roundness of the big end hole were examined by the fracture splitting test. As a result, it was found that high roundness was obtained on the conditions of a deep notch length, a small notch radius, and a fast splitting speed for the connecting rod made from ADC12-T5. On the other hand, it became clear that high roundness was obtained on the conditions of a short notch length, a large notch radius, and a slow splitting speed for the connecting rod made from ADC14-T5.