A05 液体金属脆化作用を援用した切削工具の機上再生技術に関する研究(OS6 切削加工(1))

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  • A05 Study on on-machine tool resharpening process employing LME phenomenon

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One of the most critical issues in cutting of ductile metals is chip adhesion to tool surfaces, leading to tool break age and deterioration of finished surface roughness. The present study proposes a novel strategy for removing the adhesion layer from the tool surface and recovering the cutting tool performance without detaching the cutting tool from the machine tool; namely, an on-machine tool resharpening process. To achieve efficient removal of the aluminum adhesion layer from the tool surface, the phenomenon of liquid metal embrittlement (LME), which is defined as a brittle fracture, or loss in ductility, of a ductile material in the presence of a liquid metal is employed. A series of experiments showed that the newly developed strategy employing LME is highly effective in removing the adhesion layer without damage to the tool substrate and has great potential for addressing the issues related to the dry machining of aluminum alloys. In addition, the removal performance of the developed resharpening process for steel materials is discussed.

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