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22대 대한민국 국회 국회정보길라잡이 국회의원검색
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Nomenclature 10

ABSTRACT 11

I. 서론 13

1.1. 연구배경 13

1.2. 연구목적 15

II. 이론적 배경 16

2.1. 코니칼 인볼류트 기어의 개요 16

2.1.1. 코니칼 기어 연구의 역사 16

2.1.2. 코니칼 기어의 장·단점 17

2.2. 코니칼 기어의 기초 이론 19

2.2.1. 코니칼 기어의 기하학 19

2.2.2. 코니칼 기어 제원의 계산식 24

III. 실험장비 및 시험시편 제작 26

3.1 실험장비 26

3.1.1. 측정장비 26

3.1.2. 가공장비 28

3.1.3. 물림 테스트 장비 29

3.2. 시험시편 30

3.2.1. 코니칼 기어 소재 30

3.2.2. 코니칼 기어 시편 제작 31

IV. 실험결과 및 고찰 41

4.1. 시험 기어의 치형 측정 41

4.2. 시험 기어의 물림 실험 49

4.3. 코니칼 기어의 모델링 61

V. 결론 63

참고 문헌 65

감사의 글 67

List of Tables

Table 1. Basic equations of conical gear geometry 24

Table 2. Equations of conical gear's basic model 25

Table 3. Specification of conical gear 1, 2 & specimen 1 37

Table 4. Specification of hob 37

Table 5. Specification of specimen 2 38

Table 6. Specification of each gear's fabrication 39

Table 7. Equivalent helical gear's value of specimen 1, 2 & conical gear 1, 2 41

Table 8. Temperature variation at each rpm for CW 58

List of Figures

Fig. 1. The geometry of spur gear 19

Fig. 2. The geometry of helical gear 20

Fig. 3. The geometry of spur conical gear 21

Fig. 4. The geometry of helical conical gear 21

Fig. 5. Profile of helical conical gear 23

Fig. 6. Basic model of conical involute gear 25

Fig. 7. 3D Coordinate measuring machine(Zeiss UMC-850) 26

Fig. 8. CNC gear tester(TTi-1200E) 27

Fig. 9. CNC gear cutting machine(GHO-350) 28

Fig. 10. Light run test M/C 29

Fig. 11. Conical gear workpiece 30

Fig. 12. Drawing of conical gear workpiece 30

Fig. 13. Work tilting taper hobbing 31

Fig. 14. Table sliding taper hobbing 32

Fig. 15. Hob sliding taper hobbing 33

Fig. 16. Calculation sheet for each of conical gear's specification 35

Fig. 17. Conical gears(Left side : fabricated one, Right side : specimen) 36

Fig. 18. Specimen 2(Engaged conical gear 1, 2 & specimen 1) 38

Fig. 19. Over-Ball measurement of conical gear 39

Fig. 20. Measurement of profile and lead for specimen 2 42

Fig. 21. Measurement of profile and lead for specimen 1 44

Fig. 22. Measurement of profile and lead for conical gear 1 46

Fig. 23. Measurement of profile and lead for conical gear 2 47

Fig. 24. Down angle adapter gearbox(PRM) 49

Fig. 25. Experiment of tooth bearing 50

Fig. 26. Tooth bearing between specimen 2 & specimen 1 51

Fig. 27. Tooth bearing between specimen 2 & conical gear 1 52

Fig. 28. Tooth bearing between specimen 2 & conical gear 2 54

Fig. 29. Tooth bearing of specimen 2 with specimen 1, conical gear 1,2 55

Fig. 30. Tooth bearing of specimen 1, conical gear 1,2 with specimen 1 56

Fig. 31. Temperature variation of each of bearing at each rpm for CW 58

Fig. 32. Temperature variation of each of bearing at each rpm for CCW 59

Fig. 33. Helical conical involute gear modeling 61

초록보기

Conical involute gear, or beveloid gear is very useful in machine design part. But it had not been using until several years ago, because there are some weak points, such as point contact phenomenon of tooth bearing at crossed axes and skewed axes except for parallel axes theoretically, and limited tooth width in terms of addendum modification coefficient which change along the axis of gear.

Point contact feature gives noise and high grade load which can break the tooth of the gearbox. For instance, in the passenger's car case, noise and vibration which are caused from tooth contact from gearbox are one of the important things for certification whether product is good or not, and most of the gear is used to power delivery. In these reasons, it makes those who study gear to think whether it is difficult to adopt conical involute gear as high load transmission and silence vehicles.

However, conical involute gear is rising as new gear technology. AUDI has already used conical gear in passenger's car gearbox which is called S-tronic to transfer power from transmission's output shaft to front axle and ZF makes Down Angle Transmission for marine gearbox. They not only show conical involute gear can be applied to commercial gearbox recently, but also know that conical gear is very useful and has many attractive applications.

In conclusion, until now, this technology is not generalized, but it will be increased more and more through many applications. So, in order to get conical gear design technology by ourselves, this thesis has to be conducted.

As preciously stated, this paper was written to make use of conical involute gear's strong points and confirm the basic theory, design of conical involute gear and tooth bearing characteristics of helical conical involute gear pairs.

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