曲がり穴放電加工用マイクロロボットの開発 : −極間距離自動制御機構の改良による小型化と性能向上−

概要

論文の詳細を見る
The study deals with the size reduction and performance improvement of automatic discharge gap controller (ADGC) for a microrobot which can fabricate a long curved hole by electrical discharge machining (EDM). The development of curved hole machining method is strongly required so that the pipelines with an arbitrary shape can be made in an arbitrary position. However, such pipelines cannot be fabricated since holes are generally formed by drilling. To solve the problem, the paper proposes a curved hole machining method by means of a microrobot with an EDM function. The microrobot has to have the function of performing the stable EDM in such a limited space as the bottom of a long curved hole, in other words, the function of always keeping the equipped electrode in an appropriate position automatically and autonomously so as to maintain stable EDM. ADGC is key component to realize the function. The prototype of ADGC was developed. However, the prototype was too large to install on a microrobot and did not achieve the full performance designed. Therefore, in the study, ADGC is improved to reduce its size and to achieve its full performance. From the experimental results, it is found that the improved ADGC realizes the full performance designed.