Mitsubishi Heavy Industries Technical Review
    Vol. 56 No. 1 (2019)   New Products & Technologies
    New Products

    Challenge to Zero - Gear Grinder ZE16C/26C for High Accuracy and Efficiency

    Mitsubishi Heavy Industries Machine Tool Co., Ltd.

    Efficiency improvement and vibration reduction of transmissions have been in demand with the increasing need for low fuel consumption and low noise of automobiles in recent years. As a result, demand for the precision improvement of transmission gears and the stability of grinding accuracy in mass production is increasing. In addition, automobiles are becoming significantly quieter as they proceed with electrification, so greater quietness is also required for transmissions. Generally, gears are subjected to heat treatment of the tooth flank to harden the surface and improve wear resistance and strength. However, heat treatment causes distortion of the tooth flank, resulting in the deterioration of tooth flank accuracy. For this reason, gear grinding after heat treatment is widely used for improving gear accuracy and stabilizing quality. Mitsubishi Heavy Industries Machine Tool Co., Ltd. developed the ZE16C and ZE26C, a series of gear grinding machines that adopt our proprietary gantry-type counter column structure. This paper presents these products.