대형 항공부품용 5축 가공기에서의 예측정비에 관한 연구

• 영문명: A Study on the Predictive Maintenance of 5 Axis CNC Machine Tools for Cutting of Large Aircraft Parts
• 발행기관: 한국산업경영시스템학회
• 저자명: 박철순(Chulsoon Park) 배성문(Sungmoon Bae)
• 간행물 정보: 『산업경영시스템학회지』제43권 제4호, 161~167쪽, 전체 7쪽
• 주제분류: 공학 > 산업공학
• 파일형태: PDF
• 발행일자: 2020.12.30

영문 초록

In the process of cutting large aircraft parts, the tool may be abnormally worn or damaged due to various factors such as mechanical vibration, disturbances such as chips, and physical properties of the workpiece, which may result in deterioration of the surface quality of the workpiece. Because workpieces used for large aircrafts parts are expensive and require strict processing quality, a maintenance plan is required to minimize the deterioration of the workpiece quality that can be caused by unexpected abnormalities of the tool and take maintenance measures at an earlier stage that does not adversely affect the machining. In this paper, we propose a method to indirectly monitor the tool condition that can affect the machining quality of large aircraft parts through real-time monitoring of the current signal applied to the spindle motor during machining by comparing whether the monitored current shows an abnormal pattern during actual machining by using this as a reference pattern. First, 30 types of tools are used for machining large aircraft parts, and three tools with relatively frequent breakages among these tools were selected as monitoring targets by reflecting the opinions of processing experts in the field. Second, when creating the CNC machining program, the M code, which is a CNC auxiliary function, is inserted at the starting and ending positions of the tool to be monitored using the editing tool, so that monitoring start and end times can be notified. Third, the monitoring program was run with the M code signal notified from the CNC controller by using the DAQ (Data Acquisition) device, and the machine learning algorithms for detecting abnormality of the current signal received in real time could be used to determine whether there was an abnormality. Fourth, through the implementation of the prototype system, the feasibility of the method proposed in this paper was shown and verified through an actual example.

목차

1. 서 론

2. 스핀들 모터 전류 신호 수집

3. 머신러닝을 이용한 예측모델 선정

4. 모니터링 시스템 구축 및 검증

5. 결론 및 추후연구

References

키워드

Condition-based Monitoring 5-Axis Machining Tool Current Analysis Tool Condition Prediction