Investigation on surface micro-crack evaluation of engineering ceramics by rotary ultrasonic grinding machining

摘要: Rotary ultrasonic grinding machining (RUGM) is regarded as the most powerful method for engineering ceramic. However, there are micro-cracks on machined surface inevitably lower fracture roughness of material. As part integrity, effective parameter and unified criterion not proposed micro-crack evaluation. In paper, evaluation ceramics by RUGM was investigated. Micro-crack generation area ratio calculation model information dimension were established. On basis those, a new parameter, called fractal density, to reveal characteristics micro-crack. The proved evaluate evolution rule effectively with advantages statistics multi-scale. Meanwhile, factors affecting density It found that increases cutting force rising, while it decreases toughness rises. results provide support integrity ceramics.