표제지
Abstract
목차
제1장 서론 9
제2장 스핀들 및 축변위 발생 메커니즘 11
2.1. 스핀들 축변위 발생 메커니즘 11
2.2. 스핀들 구성 14
제3장 고속 스핀들의 돌출 실험 및 검증 16
3.1. 실험장치의 구성 16
3.2. 스핀들의 축방향 돌출 실험 18
3.2.1. 예하중에 의한 돌출 18
3.2.2. 회전에 의한 축방향 돌출 19
3.3. 돌출 모델링 21
3.3.1. 베어링 모델 22
3.3.2. 돌출량 시뮬레이션 결과 23
3.4. 돌출 실험과 시뮬레이션 비교 26
3.4.1. 예하중에 의한 돌출량 비교 26
3.4.2. 회전에 의한 돌출량 비교 27
제4장 온도에 의한 돌출 28
4.1. 회전속도에 따른 온도변화 28
4.2. 예압에 따른 온도변화 31
제5장 결론 34
참고문헌 35
Fig. 1. Spindle model with ball bush type pre-loading system 10
Fig. 2. Conceptual diagram for the bearing axial displacement subjected on pre-laod 11
Fig. 3. Spindle axial displacement relationship between bearing displacement and pre-load 11
Fig. 4. Conceptual diagram for the bearing axial displacement subjected to pre-load and rotation 12
Fig. 5. Spindle axial displacement relationship between bearing displacement and rotation 12
Fig. 6. Conceptual diagram for the bearing axial displacement subjected to thermal expansion 13
Fig. 7. Spindle axial displacement relationship between bearing displacement and thermal expansion 13
Fig. 8. High-speed spindle with variable pre-load system 14
Fig. 9. Conceptual diagram for the variable pre-load system 15
Fig. 10. Spindle system 17
Fig. 11. Gap sensor (AEC5505) 17
Fig. 12. Experimental setup 17
Fig. 13. Axial displacement as a function of axial load 18
Fig. 14. Time response for axial displacement and temperature as a function of rotational speed 19
Fig. 15. Axial displacements as a function of rotational speed 20
Fig. 16. Simulation model of spindle supported by angular contact ball bearings 21
Fig. 17. Calculation procedure for angular contact ball bearing 22
Fig. 18. Simulation result of axial displacements as a function of axial pre-load 24
Fig. 19. Simulation result of axial displacements as a function of rotational speed and axial pre-load 24
Fig. 20. Spindle axial displacement as a function of rotational speed when steel ball and ceramic ball are implemented 25
Fig. 21. Axial displacements as a function of rotational speed 26
Fig. 22. Axial displacements as a function of rotational speed 27
Fig. 23. Time response for axial displacement and temperature as a function of rotational speed 29
Fig. 24. Comparison of axial displacements with the rotational speed and temperature changed 29
Fig. 25. Temperature as a function of rotation speed 30
Fig. 26. Comparison of temperature with pre-load changed 32
Fig. 27. Comparison of axial displacements with pre-load 32
Fig. 28. Axial displacement as a function of pre-load 33