多段階消磁を用いた保磁力分布と切削工程における超硬工具の損傷との関係(機械要素,潤滑,設計,生産加工,生産システムなど)

概要

論文の詳細を見る
Since the coercive force of ferromagnetic materials locally increases with the residual stress due to plastic deformation, we can evaluate the damage to a cutting tool made of cemented carbide, that containing ferromagnetic Co binder, from the distribution of residual magnetization after magnetization and multistage demagnetization. The distributions of coercive force and residual stress on a cemented carbide tool, obtained from the X-ray analysis, are found to be consistent with each other. The sintering stress and cutting resistance of the tool can estimated from its coercive force distribution. Near the cutting edge, the residual stress rapidly change from compression to tension, which indicates the relaxation of sintering stress against the machining force after reaching a stable state. Afterwards rapid change in the stress into compression over again indicates the cracking of the tool. We can detect the failure of the cutting tool from the sudden change in coercive force, before serious damage.
2010-11-25