Course No：11120840
Title：Design of photoelectricity precision structure
Class Hours/Week: 2 - 1 Credit：2.5
Category：Required course
Prerequisites：Engineering graphics, Applied optics
Audience：Undergraduates
Teaching manner：Multimedia teaching
Title：Design of photoelectricity precision structure
Class Hours/Week: 2 - 1 Credit：2.5
Category：Required course
Prerequisites：Engineering graphics, Applied optics
Audience：Undergraduates
Teaching manner：Multimedia teaching
Course objectives and basic requirements:
The course carried out comprehensive and the system narration for various structures and the components. The students are able to master the design techniques of the precision structures of the photoelectricity information testing based on Primary engineering of graphics, for example, the design of mechanical drive, the calculation the transmission ratio and etc. It can be done to design and choices the implement parts and devices in term of the system technical requirements, by the way finished the testing and control of photoelectricity information.
Course introduction:
It is important part that various novel transmission systems and the components are the base of testing and control of photoelectricity information. The course carried out comprehensive and the system narration for various mechanical structures and the components. The course provided the concept, procedure about link motion, belt and chain drives, the screw and the guidance structure, precision displacement devices, optical elements fixing, the structure and assembly of the optical lenses and etc. The class is the multimedia teaching way. It is the basic of the system of optical and mechanical in the modern testing technical fields.
Syllabus and lecture schedule:
Theory class: ( 32 class hours)
Course content:
Introduction 1 class hour
Chapter .1: Movement diagram and degree of freedom in plane structure 3 class hours
1. Basic concept and composition for mechanism
2. Movement pair and classifications
3. Plane mechanical movement diagram
4. Plane mechanical degree of freedom
Chapter.2: Plane link mechanism 4 class hours
1. Fundamental modes, applications and evolution of four pole mechanism
2. Design and transmission characteristic of four pole mechanism
Design and the error adjust of the tangent and the sine mechanism
Chapter .3: Elastic elements 2 class hours
1. Kind of Elastic elements and performance
2. Helical spring
3. Flat spring
Chapter .4: Friction wheel and flexible transmission 2 class hours
1. Friction wheel transmission
2. Flexible transmission
3. Belt transmission (leather belt, spring belt, steel belt, tooth profile belt)
4. Meshing flexible transmission
Chapter.5: Gear transmission and system design 5 class hours
1. Gear meshing principle and involutes gear
2. Correct meshing and transmission continuity for involutes gear
3. Other form gear transmission (helical gear, gear and rack)
4. Worm gear and worm transmission
5. Structural design of Gear transmission
6. Transmission ratio computation of Gear system (epicyclical train, fixed axle gear train)
7. Assignment principle for gear train transmission ratio
8. Errors and the control of the gear train
Chapter.6: Kind of screw drive and characteristic 2 class hours
1. Fundamental mode and parameter computation of screw drive
2. The screw drives error and the transmission precision
3. Axial play adjustment and application
4. Ball bearing screw drive and supporting structure form
Chapter .7-8: Supporting and shafting 4 class hours
1. Sliding friction supporting
2. Structure and design of circular cone shafting
3. Structure and design of cylinder shafting
4. Rolling friction supporting
5. Rolling friction shafting
6. Fluid friction shafting
7. Elastic support
Chapter .9: Guide way 4 class hours
1. Kind of guide way and precision request
2. Sliding friction guide way
3. Rolling friction guide way
4. Elastic friction guide way
5. Liquid static pressure guide way
Chapter .13: Micro-displacement structure 2 class hours
1. Precision micro-displacement structure and classifications
2. The machinery micro- displacement devices
3. Mechanical and electrical micro- displacement devices
Chapter .14: Optical Elements Fixing, the Structure and Assembly of the Optical Lenses 3 class hours
1. Lenses Fixing
2. Prism and Plate Fixing
3. The Structure and Assembly of the Optical Lenses
Related teaching sections:
1. Multimedia teaching
2. To exercise 2 to 3 hours after the class every week
3. Experiment classes: (Altogether 16 studying periods)
Test one: The gear parameter synthesis measurement (the gear pulsates, gear center distance, the gear circular pitch)
4 class hours
Test two: Precision guided way straightness determination 4 class hours
Test three: The eyepiece micrometer assembles 4 class hours
Test four: To test the precision high speed air shafting radial direction pulsates 4 class hours
Test and Grading Criteria：
The period overall scores are composed by two parts: Usually the result by both the theory and the experimental result two parts of syntheses, to occupy 30 percent and the exam score is 70 percent in the period overall scores.
Suggested textbooks or references:
Teaching material: Xie Lanchang. "Design Precision instrument structure" , Zhejiang University press, 2003.
Reference books:
1. Zhu Peiguo. Design foundation of precision instrument structure. Harbin Engineering University press.
2. ,Pang Zhenji. Precision machine elements. Tianjin University, Mechanical industry press
3. Xue Shifu. Precision instruments designs. Tinghua University press
4. Sheng Hongliang. Design of precision machine and structure. Beijing Institute of Technology press
5. Zhao Songnian. Design of Integration systems of machinery and electricity. Mechanical industry press