研削加工における画像処理を用いた火花と加工状態の関係の調査

抄録

As a in-process measurement method, we focused on sparks emitted when thermal energy generated by the grinding process flows into chips. However, it has not been possible to estimate the processing state from the observation of sparks. Therefor e, the objective of this study was to observe sparks generated during the grinding process by image processing and to investigate the relationship between the number, area, and brightness of sparks and the amount of metal removal and thermal effects on machined surface in the machining state. In this experiment, two types of grinding wheels were used to grind S45C and SUS316 by varying the depth of cut. To simplify the observation of sparks, all experiments were performed using dry grinding. The experimental results show that grinding resistance increases linearly with increasing depth of cut, and the number and area of sparks increase exponentially. The same trend was observed when the grinding wheel was changed. Furthermore, as the depth of cut was increased and an oxide film formed on the surface of the work piece, the tensile stress increased linearly and the number, area, and brightness of sparks increased exponentially. These results suggest the possibility of estimating the amount of metal removal and thermal effects on machined surface by observing sparks.