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1993 | Buch

Cam Synthesis

verfasst von: M. A. Gonzalez-Palacios, J. Angeles

Verlag: Springer Netherlands

Buchreihe : Solid Mechanics and Its Applications

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SUCHEN

Über dieses Buch

Despite advances in robot technology, in which industrial manipulators have replaced mechanisms, cam mechanisms still find important industrial applications in the textile, food processing and manufacturing industries. This book is a modern, up-to-date treatise on the important subject of cam synthesis.
Cam mechanisms have been studied from different points of view, namely, kinematic synthesis, dynamic synthesis, analysis, design, optimization and manufacturing. This book is oriented to the kinematic synthesis of cam mechanisms in a unified framework, i.e. that spatial, spherical and planar cam mechanisms are integrated in the same formulation. Traditionally, the synthesis of the three types of cam mechanisms has been approached using independent formulations. With a unified formulation, both well known types of cam mechanisms, as well as novel cam mechanisms can be synthesized, as shown in the book. Moreover, since all the design parameters are considered in a unified framework, the optimization theory of cam mechanisms can be applied systematically, i.e. the criteria applied for the optimization of planar cam mechanisms, which can be found to some extent in the literature, can be complemented in order to provide general criteria for the optimization of spherical and spatial cam mechanisms.
The underlying philosophy of the book has been to exploit sound mathematical and kinematical tools of analysis and synthesis that could be used only with the available current software and hardware.
The approach and tools introduced in this book can assist the designer in producing a broad spectrum of mechanisms than those described in the book.
This will be an invaluable reference for engineering designers.

Inhaltsverzeichnis

Frontmatter
Chapter 1. Preamble
Abstract
A mechanism,according to the IFToMM Commission A for Standardization of Terminology (1991), is a system of bodies designed to convert motion of, and forces on,one or several bodies into constrained motions of,and forces on, other bodies. The way these bodies are connected is defined by their kinematic pairs. Basically, there are two kinds of kinematic pairs, namely, higher and lower pairs. The former refer to the coupling of two bodies in point or line contact, while the latter refer to the same in surface contact. Lower kinematic pairs can be of six types, namely, revolute,prismatic, screw,cylindrical, spherical and planar (Hartenberg and Denavit, 1967; Angeles, 1982).
M. A. Gonzalez-Palacios, J. Angeles
Chapter 2. Synthesis Tools
Abstract
A brief account of dual numbers is presented here as a quick reference for the reader. Those readers wanting to learn more on dual numbers are referred to (Yang, 1963, 1974; Yang and Freudenstein, 1964; Veldkamp, 1976; Bottema and Roth, 1979).
M. A. Gonzalez-Palacios, J. Angeles
Chapter 3. Kinematics of Three-Link Mechanisms
Abstract
This chapter is confined to the study of cam mechanisms composed of three rigid links, namely, the fixed frame, the driving element or cam and the driven element or follower. While the study is general, special attention is given to indexing cam mechanisms (ICM).
M. A. Gonzalez-Palacios, J. Angeles
Chapter 4. Kinematics of Four-Link Mechanisms
Abstract
This chapter is devoted to the study of cam mechanisms with four links. The study of three-link mechanisms with constant pressure angle is included because these mechanisms are synthesized within our unified framework with the aid of an auxiliary roller, which thus leads to a four-link mechanism.
M. A. Gonzalez-Palacios, J. Angeles
Chapter 5. Indexing Mechanisms
Abstract
Mechanisms for intermittent motion and force transmission, termed indexing mechanisms,find extensive applications in industry. Mechanisms of this kind for motion transmission between parallel axes, such as the Geneva mechanism and external and internal indexing cam mechanisms, have been studied in the past (Guoxun, Zhengyang and Huimin 1988).
M. A. Gonzalez-Palacios, J. Angeles
Chapter 6. The Volumetric Properties of CAMS
Abstract
The subject of this chapter is the accurate and fast calculation of the volumetric properties of solids of arbitrary shape, paradigms of which are the cams and followers synthesized in Chapters 3, 4 and 5. The need for accuracy needs no explanation, but the need for speed is less obvious. In fact cam synthesis, as discussed throughout this book, is only a stage of the whole mechanical design process, which includes both element and system optimization. In turn, optimization is unavoidably an iterative process, which requires a full synthesis of the overall mechanical system at each iteration. Since optimization may sometimes require hundreds of iterations, the relevance of the economy of computations within the synthesis stage is apparent.
M. A. Gonzalez-Palacios, J. Angeles
Chapter 7. An Outline of USYCAMS
Abstract
In the last twenty years or so, computer graphics has become a fundamental tool for the study of mechanisms, as made apparent by the software available in this area. We can cite IMP (Integrated Mechanisms Program) as one of the earliest software packages developed for the analysis of arbitrary linkages (Sheth and Uicker, 1972). A few years later KINSIN III, a package meant for the synthesis of mechanisms, was introduced (Rubel and Kaufman, 1977). The graphical part of these early packages consisted essentially of 2-D lines. More mechanism software with improvements in their graphics has been produced, such as LINCAGES (Erdman and Gustafson, 1977), MINN-DWELL (Kota et al., 1987) and SIXPAQ (González-Palacios and Angeles, 1991b).
M. A. Gonzalez-Palacios, J. Angeles
Chapter 8. The CAD of CAM Mechanisms
Abstract
This chapter concerns the use of commercial CAD systems in the synthesis and design of cam mechanisms. We divide the chapter into two parts: a) the synthesis of planar cam mechanisms using CAD systems; and b) case studies of complete mechanical designs of the complex cam mechanisms synthesized in Chapter 5, i.e., PRICAM in its two versions, planar and spherical.
M. A. Gonzalez-Palacios, J. Angeles
Backmatter
Metadaten
Titel
Cam Synthesis
verfasst von
M. A. Gonzalez-Palacios
J. Angeles
Copyright-Jahr
1993
Verlag
Springer Netherlands
Electronic ISBN
978-94-011-1890-3
Print ISBN
978-94-010-4835-4
DOI
https://doi.org/10.1007/978-94-011-1890-3