機(jī)械原理

前言

　　Mechanisms and Machine Theory is the study of kinematics and dynamics of mechanisms，and the basic principles of machines.It is one of the important fundamental courses for mechanical engineering students.It also serves practical purpose in production，as it involves the first considerations of the designer in machine design.　　In order tO meet the challenge of economic globalization and technical and scientific revolution，according to the requirement of“facing modernization，facing the world，facing the future”，English should be used in some courses in undergraduate education in China.　　Because of historic reasons，there are significant differences in contents between Chinese textbook and English textbook for the course Mechanisms and Machine Theory.In this field we cannot find a suitable English textbook，which can appropriately covet the whole contents currently taught in China~s universities and colleges.Thus tO write and compile an English textbook which appropriately covers whole necessary contents and is suitable for ChimS mechanical education is a meaningful work and an urgent task.　　This book is intended for undergraduate students of most mechanical en~neering major and some other relevant majors.and contains SUfficient material for a full semester’S work.The usual prerequisites are advanced mathematics，kinematics statics，dynamics，and engineering graphics.　　This textbook is a result of collective effort of many experienced teachers from several universities and colleges.They bring their plentiful experiences from their teaching and practical work in machine design to this textbok，and each is responsible for his own work.They are~Li Can from Wuhan University of Technology（chapter 1），Xiao Pei from Wuhan University of Technology （chapter 2），Wang Zhong from Southwest University of Science and Technology（chapter 3），Li Shuiping from Wuhan University of Technology（chapter 4），Mao Ya from Wuhan University of Technology（chapter 5），Li Gangyan from Wuhan University of Technology（chapter 6），Zhang Tie from South China University of Technology and Zhang Xueliang from Taiyuan Heavy Machinery Institute（chapter 7），Han Bin from North China Institute of Water Conservancy and HydTOelectric Power（chapter 8），Zhang Zhihong from Tmyuan Heavy Machinery Institute（chapter 9），F(xiàn)eng Xuemei from Wuhan University of Technology（chapter 10），Zhang Xianmin from South China University of Technology（chapter 11）.

內(nèi)容概要

According to the basic teaching requirements for the course Mechanisms and Machine Theory,and the requirement of bilingual teaching,this textbook is writtenfor students and teachers of mechanical engineering major in universities and colleges in China.    There are 12 chapters in this textbook:Introduction,Structure Analysis of Me chanisms,Kinematic Analysis of Mechanisms,Friction and Efficiency of Machineries,Planar Linkage Mechanisms,Cams and Their Design,Gears and Their Design,Gear Trains,The Design of Combined Mechanism and Other Common Mechanisms,Machinery Operation and Adjustment of Velocity Fluctuation in Machineries and Balancing. There are some problems and notes at the end of each chapter for students to grasp and practice.    This book can be used as textbook for course Mechanisms and Machine Theory,taught as bilingual teaching material,or be used as textbook for course English in Mechanical Engineering,for students of mechanical engineering major in universitles and colleges. It can also be used as reference book for teachers,students and engineers of mechanical engineering major and other relevant majors.

書籍目錄

Chapter 1  Introduction　1.1  About this Course　1.2  Mechanisms and Machines　1.3  Content of this Course　1.4  Design Process and this Book　NotesChapter 2  Structure Analysis of Mechanisms　2.1  Introduction　2.2  Composition of Mechanisms 　2.3  Kinematic Diagrams　2.4  Mechanism with Confirmed Motion　2.5  Number of Degrees of Freedom of the Mechanisms　2.6  Notes when Determine the Number of DOF of Planar Mechanisms　Problems　NotesChapter 3  Kinematic Analysis of Mechanisms　3.1  Tasks and Methods of Kinematic Analysis　3.2  Velocity Analysis by the Method of Instantaneous Center　3.3  Kinematic Analysis by Complex Numbers　Problems　NotesChapter 4  Friction and Efficiency of Machineries　4.1  Introduction　4.2  Friction in Joints/Kinematic Pairs　4.3  Efficiency of Machineries　4.4  Self-lock of Machineries　Problems　NotesChapter 5  Planar Linkage Mechanisms　5.1  Introduction　5.2  The Types of Four-bar Mechanisms and Application　5.3  Characteristics Analysis of Four-bar Linkages　5.4  Synthesis of Four-bar Mechanism　Problems　NotesChapter 6  Cams and Their Design　6.1  Introduction　6.2  Cam and Follower Types　6.3  Process of Cam Synthesis　6.4  Displacement Diagrams of Follower　6.5  Graphical Cam Profile Synthesis　6.6  Analytical Cam Profile Synthesis　6.7  Cam Size and Physical Characteristics　Problems　NotesChapter 7  Gears and Their Design　7.1  Introduction　7.2  Applications and Types of Gear Mechanisms　7.3  Fundamental Law of Toothed Gearing　7.4  Involute Properties　7.5  Terminology and Definition of Gears　7.6  Involute Geometry　7.7  Mesh and Trains of Involute Spur Gears　7.8  Contact Ratio　7.9  The Forming of Involute Spur Gear　7.10  Interference and Undercutting　7.11  Pofile?shifted Gear　7.12  Helical Gears　7.13  Crossed Helical Gears　7.14  Worm Gearing　7.15  Bevel Gears　Problems　NotesChapter 8  Gear Trains　8.1  Introduction　8.2  Ordinary Gear Trains　8.3  Epicyclic Gear Trains　8.4  Compound Gear Trains　8.5  Design of Planetary Gear Trains　8.6  Efficiency of Planetary Gear Trains　Problems　NotesChapter 9  The Design of Combined Mechanism and Other Common Mechanisms　9.1  Ratchet Mechanism　9.2  Geneva Wheel　9.3  Intermittent Gearing　9.4  Universal Joint Mechanism　9.5  Combination of Mechanism　Problems　NotesChapter 10  Machinery Operation and Adjustment of Velocity Fluctuation in Machineries　10.1  Introduction　10.2  Kinetic Equations of Machinery　10.3  Solution of the Kinematic Equation of Motion　10.4  Flywheels and Periodic Fluctuation of Speed of Machinery Problems　NotesChapter 11  Balancing　11.1  Introduction　11.2  Static Balance　11.3  Dynamic Balance　11.4  Balancing of Planar Linkages　Problems　NotesReferences

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