Mitsubishi Heavy Industries Technical Review
    Vol. 57 No. 3 (2020)   Machine Tools
    Technical Papers

    Improvement and Stabilization of Spatial Accuracy of Entire Processing Area Using Three-Dimensional Spatial Error Correction System for Double-Column Milling Machines

    Koji Iwata,
    Katsuhiro Fujimoto,
    Shingo Nakamura

    The improvement of machining precision for double-column milling machines is in increasing demand, especially for such as automobile die and mold machining. While conventionally the priority lies in the precision attainable within a limited machining area and the relative error compared to the adjoining machined areas, demand in recent years calls for improving overall machining precision. In double-column milling machines, the error caused by changes in the level of the machine foundations over time, etc., is not insignificant. This report describes the "three-dimensional spatial error correction system," which can maintain spatial accuracy throughout the machine's entire stroke range over a long period of time, successfully ensuring the required machining precision in a stable manner.