滾子輪式凸輪分割機構在自動化與工具機之應用上扮演重要的角色。具緊密結構的滾子輪式凸輪分割機構，因其高剛性與縮減的背隙，使其能夠達到所需的輸出精度。工業應用對於滾子輪式凸輪分割機構精度提昇的需求，驅使滾子輪式凸輪分割機構的研究繼續前進。本論文針對滾子輪式凸輪分割機構之精度提昇提出兩項策略。

第一個策略是考慮包含在加工與組裝過程中的製造參數。對於溝槽式的滾子輪式凸輪間歇機構其轉塔運動與輸出精度的解析關係，描述於本論文之中。依據凸輪與其滾子從動件轉塔之運動學與幾何學的關係，由間隙(溝槽式凸輪與滾子之間，以及滾子軸承內部)，預力(凸輪與其轉塔中心距之改變)以及凸輪錐面角度三方面對於輸出性能的影響， 在此論文中探討。此外，也能夠分析凸輪轉塔系統的滾子交替現象。在設計加工以及組裝上有利的參數可選用於生產此設備，以改善轉塔的分割精度。本論文中以數個例子說明此模式之應用。

第二個策略為由彈簧－平板凸輪－平移從動件所組成之扭力平衡凸輪系統的設計技術。這個設備安裝於滾子輪式凸輪分割機構的輸入軸，以減少凸輪轉速的變動。所以，在高速運轉時，滾子輪式凸輪分割機構的殘振強度可以降低，而使分割精度提昇。為了近似所需的平衡扭力曲線，以非參數式有理式B仿線合成平板凸輪運動曲線。實驗結果驗證扭力平衡凸輪機構在高速應用是實用且有效的。

Globoidal cam indexing mechanism (GCIM) plays an important role in automation and machining tools. With the compact structure, a GCIM is able to reach the required precision on account of high stiffness and minimized backlash. The requirement to improve the indexing accuracy for GCIMs from industry applications drives the research going on. In this dissertation, two strategies to improve the indexing accuracy of GCIMs are proposed.

The first strategy is by considering the manufacturing parameters involved in the processes of machining and assembly. Analytical expressions for the turret motion and indexing accuracy of grooved GCIMs have been identified. Based on the kinematic and geometric relationships between the cam and its roller-follower turret, the effects on the output of the cam mechanism due to clearances (between the cam and roller; in the roller bearing), preload (change of the distance between input and output shafts), and the cam taper angle have been investigated. As a result, the roller alternation in the cam-turret system can be analyzed. Favorable parameters for the design, machining, and assembly can be selected to manufacture such devices with improved turret motion and indexing accuracy. Worked examples are given to demonstrate the applications of the approach.

The second strategy is a technique for designing torque balancing cam (TBC) systems that are composed of spring-loaded planar cams with translating followers for GCIMs. Such a device can be attached to the input shaft of a GCIM to reduce the variation of its cam rotational speed. As a result, for high-speed applications, the intensity of residual vibrations of a GCIM can be decreased and its indexing accuracy can be improved. To approximate the required counterbalancing torque curves, nonparametric rational B-splines have been applied to synthesize the planar cam motion programs. Experimental results have also been shown in a practical and high-speed application to prove such a TBC mechanism is useful and effective.

Acknowledgments i
Abstract ii
Contents v
List of Figures vii
List of Tables x
Nomenclature xi
Chapter I Introduction 1
1.1 Background 1
1.2 Motivations and Purposes 6
1.3 Organization of this Dissertation 8
Chapter II Production Procedure of GCIMs 10
2.1 Design Stage 11
2.2 Machining Stage 14
2.3 Assembly Stage 15
2.4 Inspection Stage 16
Chapter III Cam Motion Curve and Profile 20
3.1 Cam Motion Curve 20
3.2 Cam Profile 24
Chapter IV Design for Manufacturing of Grooved GCIMs 28
4.1 Grooved and Ribbed GCIMs 28
4.2 Parameters involved in the Manufacturing Procedure 29
4.3 Numerical Examples 37
Chapter V Torque Balancing Cam 54
5.1 Torque Balancing Equation 54
5.2 Procedure Decision of Ideal Balancing Torque 71
5.3 Experiments 80
Chapter VI Conclusions 85
Reference 88

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