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

    Large Precision Machine MVR-Fx Achieves High-Precision and High-Quality Machining

    Mitsubishi Heavy Industries Machine Tool Co., Ltd.

    Weight reduction and increased design complexity for products such as automobiles have been advancing. Along with this situation, demand for high machining accuracy of die-mold machines and high machined surface quality has been growing. If satisfactory quality cannot be obtained on a machined die, time is taken for redoing the machining or a workman repairs the machined die by hand. Considering the improvement of productivity and the shortage of skilled laborers, satisfactory quality should be achieved in the first machining, but it is difficult for a general purpose 5-face machining center to fully satisfy this need. We conducted a drastic review of the machine body structure and the control method so that high-accuracy and high-quality die mold machining can be realized, and the large precision machine MVR-Fx, in which our proprietary technologies were incorporated, was commercialized. With the concept "Target set to ZERO," the MVR-Fx has gone through evolutions in various machining cases to achieve ZERO steps, ZERO form errors and ZERO hand finishing. The high-precision 5-axis index head (universal head) and the Visionplus Tool optical image tool measurement system were newly developed and multilateral approaches to machining have been realized, which are introduced here.