Mitsubishi Heavy Industries Technical Review
    Vol. 52 No. 3 (2015)   Machine Tools
    Technical Papers

    Improvement in Robustness of High-speed Hole Position Measurement System for Construction Machines


    When the boom of a construction machine is processed by an opposed horizontal boring machine, the hole position is measured using a touch sensor. However, this measuring time is a bottleneck in the enhancement of productivity and therefore the improvement of the measurement speed is desirable. Mitsubishi Heavy Industries, Ltd. (MHI) developed a contactless hole position measurement system and realized the enhancement of productivity through a reduction of the process time. This measurement system offers an optimum processing algorithm for workpieces that have various disturbance factors at customer machining sites to realize high robustness. This paper presents specific issues in improving the robustness of a contactless measurement system and their solutions, as well as the automatic hole position offset function that can eliminate manual intervention.