초록

-주축계의 수치 해석을 통한 모델 정립 및 계획수립-정전 용량형 변위 센서 개선 및 개발-중절삭시 표면 품질과 절삭력 및 주축 내부상태신호 간의 관계 규명-절삭 실험을 통한 모니터링 시스템의 적용-공구마멸에 따른 가공층변화 및 표면 품위의 정량화-모니터링 시스템 구축 및 알고리즘 개발

Abstract ▼

A cylindrical capacitance-type spindle displacement sensor was developed and its effectiveness as a system to monitor cutting conditions during hard turning was tested in this research. The sensor was installed between spindle cover face and chucking element and could measure pure radial motion of t

A cylindrical capacitance-type spindle displacement sensor was developed and its effectiveness as a system to monitor cutting conditions during hard turning was tested in this research. The sensor was installed between spindle cover face and chucking element and could measure pure radial motion of the spindle in presence of roundness error at measured surface. To prove the effectiveness of the developed sensor, hard turning tests using ceramic inserts and tool steel workpiece were conducted. The tool steel workpiece was hardened up to 65 Rc. The variations of pure radial motion of the spindle were measured using this sensor during the cutting tests. Its signals from the sensor showed the same pattern of cutting force variations from the tool dynamometer due to the progress of tool wear. As the flank wear of the ceramic tool increased, both static component of cutting forces and the center shift of spindle orbit increased. Results from the research showed that the developed sensor could be utilized as an effective and cheap on-line sensing tool to monitor cutting conditions and tool performance in the un-manned machining center. Also the surface roughness and integrity of the machined workpiece were investigated in relation to the cutting conditions.

목차 Contents

• 제 1 장 서론...6
• 제 1 절 연구개발의 필요성...6
• 제 2 절 연구개발의 범위...9
• 제 2 장 국내외 기술개발 현황...12
• 제 3 장 연구개발수행 내용 및 결과...15
• 제 1 절 주축계 및 공구계의 진동 특성...15
• 제 2 절 정전 용량형 주축 변위 센서...26
• 제 3 절 가공 실험을 위한 setup...42
• 제 4 절 가공 실험...49
• 제 5 절 해석...72
• 제 4 장 연구개발목표 달성도 및 대외기여도...97
• 제 5 장 연구개발결과의 활용계획...103
• 제 6 장 참고문헌...108
• 제 7 장 부록...112
• 실시간 상태 모니터링용 프로그램...113
• 저장된 절삭 상태 review 및 관리용 프로그램...133
• 절삭 실험 결과 분석용 후처리 프로그램...180