Mitsubishi Heavy Industries Technical Review
    Vol. 50 No. 1 (2013)   New Products & Technologies
    Technical Papers

    Technology for High-speed and High-performance Milling of LH250 High-precision Double Column Machining Center

    Shigeru Honda,
    Yoshikatsu Sato,
    Hidefumi Omokawa,
    Hiroyuki Wakamoto

    When viewed from the size of workpieces to be cut, there are only a few machine tools that are positioned between machining centers and large machines. Therefore medium‐sized workpieces are often cut by large machines. However, as the tolerance requirements for such workpieces cut by large machines have become tighter and it is difficult to achieve such tolerance only with machine performance, an increasing number of markets depend on the skill of operators. MHI has combined long‐time stabilization technologies applied on the μV1 micro milling machine with the manufacturing techniques of double column large machines to develop the LH250, which attains a machining accuracy equivalent to that of micro milling machines. This document describes the technical features, performance and machining accuracy of the LH250, which includes a high‐speed spindle as standard equipment and enables long‐term high‐precision machining.