Abstract

In-process detection of drill wear is one of the most important technoligies for automatic, unmaned machining systems. In this study, an on-line drill wear estimation model based on spindle/Z-axis motor currents generated during the drilling process is proposed. The theoretical model is obtained by integrating the drilling process model and the servomechanism model. The drilling process model describes the relationship of drill wear and drilling torque/ thrust force, whereas the servomechanism model describes the relationship of drilling torque/ thrust force applied to motor and spindle/Z-axis motor current. Evaluation tests have shown that the proposed model is a good real-time estimator for drill wear.

Keywords

• Drill Wear;
• Motor Current;
• Drilling Process Model;
• Servomechnism;
• Drill Wear Estimation Model

• 드릴마멸;
• 모터전류;
• 드릴링 공정모델;
• 서보계 모델;
• 드릴마멸추정모델;