Mitsubishi Heavy Industries Technical Review
    Vol. 52 No. 1 (2015)   New Products & Technologies
    Technical Papers

    MHI Super-Skiving System for Longer Tool Life and Enhanced Efficiency in Internal Gear Cutting

    TETSUJI MONDEN
    TOSHIMASA KIKUCHI
    YU CHIHARA
    YOZO NAKAMURA

    In recent years, the automotive industry has been demanding high-precision and high-efficiency processing of internal gears (ring gears) used for planetary gear devices in terms of improvement of fuel efficiency and reduction of noise. To achieve these, manufacturers are developing a skiving cutting system expected to realize high precision and high efficiency. However, the conventional skiving cutting system using a gear shaper cutter (skiving cutting) has not come into practical use because, in principle, its cutting load is large and, therefore, tool life is shortened and production costs are increased. Against such a background, Mitsubishi Heavy Industries, Ltd. (MHI) has established a process technology with similar accuracy to the skiving cutting while exceeding it in efficiency and tool life. This paper presents the process technology.