Study on on-machine tool resharpening process

本研究提出了一种在不将刀具从机床上拆卸下来的情况下去除刀具表面粘附层并恢复刀具性能的新策略，即在机床上重新磨削工艺。为了实现从刀具表面有效地去除铝粘附层，采用了液态金属脆化(LME)现象，其定义为在液态金属存在的情况下延性材料的脆性断裂或延性损失。一系列的铣削实验清楚地表明，采用液态镓的磨削策略成功地去除了刀具表面的铝附着物，而不损害刀具基材，而重新磨削的刀具表现出与原始状态相当的优异的切削性能。

The present study proposed 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 was employed. A series of milling experiments clearly showed that the developed strategy employing liquid gallium successfully removes the aluminum adhesion from the tool surface without damage to the tool substrate, and the resharpened tool shows excellent cutting performance nearly equivalent to its virgin state.