课程门户-章节详情

Zu Li 祖莉

1 Introduction
- 1.1 课程介绍-Course introduction（课程展示视频）
- 1.2 教学队伍-Teaching team
- 1.3 课程大纲-Course syllabus
- 1.4 教学计划-Teaching plan
- 1.5 授课教案-Course Scheme
- 1.6 参考教材-Reference textbook
- 1.7 参考文献-References
- 1.8 网络资源-Internet resources
- 1.9 课件-Courseware-Introduction
- 1.10 实验指导书-Experiment Guidebook
- 1.11 教改论文-Teaching reform thesis
2 Chapter02-the Strength of Machine Element
- 2.1 Types of Loading and Stress
- 2.2 Strength calculation of mechanical parts under static stress
- 2.3 Fatigue strength calculation of mechanical parts
- 2.4 Contact strength of mechanical parts
- 2.5 Course exercises
3 Friction Wear and Lubrication
- 3.1 Friction
- 3.2 Wear
- 3.3 Lubrication
- 3.4 Self study materials
- 3.5 Course exercises
4 Threaded Joints
- 4.1 Introduction and Threads
- 4.2 Threaded Joints Types and Fasteners（课程展示视频）
- 4.3 Preloading and anti-loosening of threaded joints（课程展示视频）
- 4.4 Strength calculation of single bolt joints
- 4.5 Design of Bolt Joint Set
- 4.6 Course exercises
5 Keys and Splines
- 5.1 Key Connection
- 5.2 Spline Connection
- 5.3 Keyless Connection and Pin Connection
- 5.4 Course exercises
6 Riveting,Welding and Bonding(self-study)
- 6.1 Self study materials
7 Power Screws
- 7.1 Type , Characteristics and Application of Power Screws
- 7.2 Sliding Power Screws
- 7.3 Ball Screws Drive（课程展示视频）
  - 7.3.1 Ball Screws（video 1）
  - 7.3.2 How to use the ball screws to design Machines（video 2）
- 7.4 Internet Resources and Course exercises
8 Belt Drives
- 8.1 Introduction(video 8.1.1 and 8.1.2)
- 8.2 Analysis of Working Process of Belt Drives （课程展示视频）
  - 8.2.1 Force analysis（video 8.2.1）
  - 8.2.2 Creeping and Elastic slipping（video 8.2.2）
- 8.3 Design Calculation of Belt Drive(video 8.3.1)
- 8.4 Structure Design of Pulley (video 8.3.2-8.4-8.5)
- 8.5 Tension and Maintenance of the Belt
- 8.6 Introduction to Other New Belt Drives
- 8.7 Internet Resources and Course exercises
9 Chain Drives
- 9.1 Introduction(video 9.1-9.3)
- 9.2 Construction of the Transmission Chain
- 9.3 The Structure and Material of Roller Chain
- 9.4 The Geometric Parameters of Chain Drive
- 9.5 The Kinetic Characteristic of Roller Chain
- 9.6 Chain Drives Load Analysis
- 9.7 Failure Mode and Bearing Capacility(video 9.7-9.8)
- 9.8 Chain Drives Design Calculation
- 9.9 The Layout, Tensioning, Lubrication
- 9.10 Course exercises
10 Gear Drives
- 10.1 Introduction（video 10.1-10.3）
- 10.2 Failure mode of gear drive and design criteria
- 10.3 Material and heat treatment
- 10.4 Computation load(video10.4-10.5.1)
- 10.5 Strength calculation of spur gears(video10.5.2)
- 10.6 Design parameters and allowable stress(video10.6-10.7)
- 10.7 Strength calculation of helical gears
- 10.8 Strength calculation of bevel gears(video10.8-10.11)
- 10.9 Strength calcualtion of modified gears
- 10.10 Structure design of gears
- 10.11 Lubrication for gear drive
- 10.12 Internet Resources and Course exercises
11 Worm gear Drives
- 11.1 Worm Gears and Worms; Making, Materials(video11.1.11.2)
- 11.2 Main Parameters and Geometrical Calculations
- 11.3 Force Analysis（课程展示视频）
- 11.4 Sliding speed and efficiency of worm gearing(video11.4-11.6)
- 11.5 Lubrication and Heat Dissipation
- 11.6 Structural Design of Worm and Gears
- 11.7 Internet Resources and Course exercises
12 Shafts
- 12.1 Introduction(video12.1-12.2.1)
- 12.2 The configurational design of shafts(video12.2.2-12.5)
- 12.3 Strength calculation of shafts
- 12.4 Stiffness and vibration of shafts
- 12.5 Methods to improve strength and stiffness of shafts
- 12.6 Course exercises
13 Sliding Bearings
- 13.1 Introduction(video13.1-13.4)
- 13.2 Types of the radial sliding bearings
- 13.3 Sliding Bearing Materials and the structure of bearing sleeve
- 13.4 Boundary-lubricated bearing design
- 13.5 Course exercises
14 Rolling Element Bearings
- 14.1 Introduction(video14.1-14.2)
- 14.2 Types and Selection of Rolling Element Bearings
- 14.3 Force Analysis, Failure Form and Calculation Criterion of Rolling Bearing (video14.3-14.4
- 14.4 Calculation of Dynamic Load and Life of Rolling Bearings
- 14.5 Combined Structure Design of Rolling Bearing (video14.5)
- 14.6 Course exercises
15 final exam
- 15.1 paper
- 15.2 answer sheet

Course exercises

5-1Which of the key joins are staticjoints? Which are the dynamic connections?

5-2 Which of the key joins are loosejoints? Which are tight connections?

5-3 Where do the three types of flatkeys, A, B, and C apply to? What are the advantages and disadvantages of each?How to process the corresponding keyway?

5-4 What are the characteristics of thespline connection compared to the flat key?

5-5 What are the tooth shapes of thespline?

5-6 How many centering methods dosplines have? What are the characteristics?

5-7 According to the purpose of the pinconnection, what types are usually divided into ?

5-8 What are the characteristics ofcylindrical pins and tapered pins?

5-9 Are there several forms of keylessconnections? What are the characteristics? Where do they apply to?

5-10 To accurately position a part on aflat base, how many positioning pins should be installed? why? How toconsider the relative position of eachpin?

5-11 A cylindrical gear with a diameterof 60 mm is installed on the shaft end . The length of the hub is 90 mm, andthe load is stable during operation. Try to design the structure and size ofthe flat key joint and calculate the maximum torque that it can transmit.

5-12 Try to select the type A ordinaryflat key used for the pulley and shaft connection. It is known that thematerials of the shaft and the pulley are steel and cast iron respectively, thediameter of the pulley and the shaft is d=40 mm, the length of the hub is l=70mm, the transmitted power is P=10 kw, the rotational speed is n=970r/min, and the load has a slight impact. Draw the joint cross-sectional area ata 1:1 scale and mark the key specifications and the dimensions on it.

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