표제지
목차
Ⅰ. 서론 9
Ⅱ. 이론적 배경 11
1. 절삭가공 11
2. 절삭공구 11
3. 절삭 방법 13
4. 엔드밀(Endmill) 13
4.1. 엔드밀의 형상 16
5. 절삭유 19
5.1. 절삭유의 종류와 선택 20
6. 표면 거칠기 23
6.1. 표면 거칠기 23
6.2. 금속 표면의 구조 27
6.3. 표면 거칠기에 영향을 주는 인자 29
6.4. 조도 측정법 30
Ⅲ. 절삭실험 장치 및 방법 31
1. 수직 머신 31
2. 절삭공구 31
3. 시험편 34
4. 절삭유 34
5. 절삭실험 및 절삭조건 38
6. 표면 거칠기 측정 40
Ⅳ. 실험 결과 및 고찰 43
Ⅴ. 결론 55
참고문헌 56
ABSTRACT 57
Table 1. Cutting process 12
Table 2. Type of end mill 15
Table 3. Type of cutting oil 21
Table 4. Selection of cutting oil by cutting type 22
Table 5. The specification of vertical machine 33
Table 6. The specifications of endmill 33
Table 7. Chemical composition of work-piece Al-7075 35
Table 8. Mechanical properties of work-piece Al-7075 35
Table 9. Chemical composition of water-soluble cutting oil 36
Table 10. Physical properties of water-soluble cutting oil 36
Table 11. Physicalproperties of non water-soluble cutting oil 37
Table 12. Cutting conditions 39
Table 13. The specification of surface roughnessmeasuring instrument 41
Fig. 1. Comparison of cutting direction. 15
Fig. 2. Geometry of solid type endmill. 17
Fig. 3. Center line average roughness(Ra).(이미지참조) 25
Fig. 4. Maximum height roughness(Rmax).(이미지참조) 25
Fig. 5. Ten point height of irregularity(Rz).(이미지참조) 26
Fig. 6. Surface textur. 28
Fig. 7. Cutting test by vertical machine. 39
Fig. 8. Measuring instrument of surface roughness. 41
Fig. 9. Surface roughness according to tool cutting speedat coldcompress ion air. 45
Fig. 10. Surface roughness according to tool cutting speedat coldwater-solublecutting oil. 45
Fig. 11. Surface roughness according to tool cutting speedat coldnon water-solublecutting oil. 46
Fig. 12. Surface roughness according to tool cutting speedat spindle speed 500 rpm. 47
Fig. 13. Surface roughness according to tool cutting speedat spindle speed 600 rpm. 47
Fig. 14. Surface roughness according to tool cutting speedat spindle speed 700 rpm. 48
Fig. 15. Surface roughness according to tool cutting speedat spindle speed 800 rpm. 48
Fig. 16. Surface roughness according to tool cutting speedat spindle speed 900 rpm. 49
Fig. 17. Surface roughness according to tool cutting speedat spindle speed 1000 rpm. 49
Fig. 18. Surface roughness according to tool cutting speedat spindle speed 1100 rpm. 50
Fig. 19. Surface roughness according to tool cutting speedat spindle speed 1200 rpm. 50
Fig. 20. Surface roughness according to tool cutting speedat spindle speed 1300 rpm. 51
Fig. 21. Surface roughness according to tool cutting speedat spindle speed 1400 rpm. 51
Fig. 22. Average surface roughness according to toolcutting speed at spindle speed 500 ~ 1400 rpm. 52
Fig. 23. Surface roughness according to tool spindle speedat coldcompress ion air. 53
Fig. 24. Surface roughness according to toolspindlespeed at cold water-solublecutting oil. 53
Fig. 25. Surface roughness according to toolspindle speedat cold non water-solublecutting oil. 54
Fig. 26. Average surface roughness according to tools pindlespeed at cold compress ion air, cold water-soluble cutting oil and cold non water-soluble cutting oil. 54
Photo1. Vertical machine. 32
Photo2. Surface roughness measuring instrument. 42