バインダレスcBN工具を用いた医療用コバルトクロム合金の高能率加工に関する研究

抄録

In recent years, the number of patients with osteoarthritis of the knee has been increasing with the aging of the population, and knee joint replacement surgery is a treatment for this disease. A high carbon content Co-Cr-Mo alloy (HC-CCM alloy) with excellent wear resistance has been developed as a material used for this treatment. However, there have been no reports on the cutting characteristics of HC-CCM alloys by milling. In this study, the cutting performance of binderless cBN tools in the high-speed cutting region at cutting speeds of 5.0 m/s or higher. As a result, a surface roughness of 0.6μmRz was obtained even under high-speed cutting conditions, but tool damage on the side cutting edge was significant at a cutting speed of 20 m/s. Therefore, a cutting speed of 10 m/s was the most suitable condition for machining HC-CCM alloys.