Mechanical design pattern introduction
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Introduce the design patterns used in mechanical deisign, focus on Bottom-Up, Top-Down, Mixed and Module design. Hope my personal understanding can give those Mechanical designers some hints in their daily work. And I believe, right design pattern can help you greatly reduce your daily work.Thanks, Robin!
![Definition of Design Pattern
• A design pattern in architecture and computer science is a
formal way of documenting a solution to a design problem in
a particular field of expertise.
• The idea was introduced by the architect Christopher Alexander in the field of
architecture[1] and has been adapted for various other disciplines, including
computer science.[2]](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)
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Mechanical design pattern introduction
- 1. Mechanical Design Pattern Prepared and Presented By: Robin Ji
- 2. Definition of Design Pattern • A design pattern in architecture and computer science is a formal way of documenting a solution to a design problem in a particular field of expertise. • The idea was introduced by the architect Christopher Alexander in the field of architecture[1] and has been adapted for various other disciplines, including computer science.[2]
- 3. 4 Design Patterns, we want to talk … • Bottom-Up • Top-Down • Mixed • Module design
- 4. Demos will be used… • Gear Box design… • Auto design…/Bicycle design… • Auto Engine design…
- 5. Gear Box ---- Bottom-Up
- 6. Gear Box ---- Bottom-Up • Design Object: 1. Power Transmission 2. Torque 3. Revolution Speed 4. And etc…
- 7. Gear Box ---- Bottom-Up • Design Method 1. Engineering calculation 2. Engine selection 3. Transmission series planning 4. Transmission ratio and gear pairs planning 5. Gear Box general design 6. And etc…
- 8. Gear Box ---- Bottom-Up • Mechanical design with CAD tool 1. Gears, shafts, gear box ---- components 2. Gear pairs and shaft ---- sub-assembly 3. Sub-assembly and gear box ---- top assembly
- 9. Gear Box ---- Bottom-Up • Summary: We do it from bottom to top… It’s the traditional design pattern for most of mechanical design conditions. And etc… Welcome your input!
- 10. Bicycle design ---- Top-Down
- 11. Bicycle design ---- Top-Down • Design Object: 1. A bicycle shown in above slide… 2. Fashion… 3. Easy to driving… 4. And etc… All above objects are not quite clear, but we know we need a good bicycle.
- 12. Bicycle design ---- Top-Down • Design method 1. Pencil sketch the architecture of the bicycle
- 13. Bicycle design ---- Top-Down • Design method [NX ---- Demo CAD tool] 2. Convert pencil sketch to bicycle architect in MCAD
- 14. Bicycle design ---- Top-Down • Design method [NX ---- Demo CAD tool] 3. From then on, Top-Down design method will be used to design the main parts of this bicycle. WAVE Geometry Link and WAVE
- 15. Bicycle design ---- Top-Down • Design method [NX ---- Demo CAD tool] 4. After we created almost all components on assembly environment, we got the bicycle, and finished our design.
- 16. Bicycle design ---- Top-Down • Summary: We do it from Top assembly to each components… We do it from the concept that we need a good bicycle. And etc… Welcome your input!
- 17. Auto design ---- We do it now
- 18. Auto design ---- We do it now • Pencil Sketch
- 19. Auto design ---- We do it now • Slice Sketch
- 20. Auto design ---- We do it now • CAD Sketch/CAD Modeling
- 21. Auto design ---- We do it now • Industrial design model
- 22. Auto design ---- We do it now • As we get the industrial design model, we will divide it into different modules to do detail design. Until now, we use Top-Down design pattern in Auto design. • In fact for Auto design in module, such as new engine, we will use Bottom-Up. Obviously, we will use mixed design pattern in the Auto Design period. • What’s your comments?
- 23. Auto Engine Design ---- Module Design • For a certain auto type, it always has different engines installed. How we do auto engine design? We will use some slides to describe module design.
- 24. Auto Engine Design ---- Module Design • When we talked about module design, we talked about selection more than that of design. • For this type of issues, we always have clear input and output.
- 25. Auto Engine Design ---- Module Design • Auto engine selection: • Size of the Engine <= Space left for Engine • Power of the Engine should be suitable to the size of the auto • Gasoline usage should obey local law • And etc… • With all above conditions, we can only pick out 3 or 5 types of engine suit to this type of auto.
- 26. Auto Engine Design ---- Module Design • When we talked about module design, we talked about series design than that of part design. • For example belt pulley of auto engine, we always use parametric design for the diameter and width of the pulley.
- 27. Auto Engine Design ---- Module Design • Belt pulley parametric design: • Different size of pulley • Different ratio of pulley pair • Suit to different working conditions • With parametric design, this type of pulley can be used in many types of auto engine and meet their different requirements.
- 28. Summary • It’s a short introduction of design patterns used in Mechanical. It may not contain all design patterns, and may not cover all the fields of mechanical design. • With this slide, if you can get some hints of design pattern and use it to review your daily working, then it deservers. • Welcome your input!