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Engineering Design I

Engineering Design I. mvrt. Table of Contents. Design Constraints. Design Process. Brainstorming Narrowing the design Prototyping Redesigning Finalizing the design Inventorizing Machining Building/Assembly. Constraints Design constraints Functionality Machine-able Feasibility

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Engineering Design I

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  1. EngineeringDesign I mvrt

  2. Table of Contents Design Constraints Design Process Brainstorming Narrowing the design Prototyping Redesigning Finalizing the design Inventorizing Machining Building/Assembly • Constraints • Design constraints • Functionality • Machine-able • Feasibility • Time • Size • Weight • Maintainability • Big picture

  3. Design Constraints

  4. Constraints As an engineering there are many constraints to worry about

  5. Design Constraints • Functionality • Machine-able • Feasibility • Affordable – Time, man power, cost • Size and Weight • Maintainability • Cost Effective • Replaceable • Programmable • Practical

  6. Functionality • What are you trying to accomplish? • Functionality - The function you want the part to serve • Maximize how well the part works • Simple is always better

  7. Machine-ability • How easy it is to machine the part • We have limited resources and machine most of the parts ourselves • Timing and feasibility are key • Timing – limited time can be spent machining • Feasibility – Our machines can only do so much

  8. Cost • We have a limited amount of funds allotted from our budget to spend on the robot • You are only allowed to spend a fixed amount on the final robot • Specialty parts and shipping costs add up

  9. Size • The robot can only be 28” x 38” x 60” • Need to fit… • Electrical components • Different manipulators • Ex. Minibot release and arm

  10. Weight • The robot has a maximum weight • Ex. maximum 120 lbs. • Includes arm, minibot release, electronics • Does not include the battery or bumpers

  11. Maintainability • After building, you need to maintain all the parts • Ex. If you have surgical tubing, it needs to be changed often • Ex. Tightening bolts, wires

  12. Big Picture • Needs to fit constraints present by FIRST • Ex. Size and weight • Follows the spirit of FIRST • Able to be integrated with the design of the rest of the robot • KISS – Keep It Simple Stupid

  13. Design Process

  14. Design Process

  15. Brainstorming • Understand the challenge • Come up with ideas • Evaluate the ideas by considering the constraints and using Common Knowledge

  16. Narrowing the Design • figure out details of the design on paper and later inventor • More details on paper = easier to put into inventor • Come up with plan for prototype • Figure out how parts connect together • Choose materials and other specifics of the design • Re-evaluate design with considering the other components of the robot

  17. Prototyping • Build a prototype of the design • Use cardboard and other easy to find material • Purpose: Proof of concept • Starts addressing issues that will come up in the real part

  18. Design Review • Get advice from experts in the field • Ex. mentors • Welcome constructive criticism • Helps solve design flaws • Introduces new ideas • 1-2 every build season

  19. Redesign • Use feedback from Design Review • Enhance design • Fix flaws by either fixing the prototype or creating a new prototype • Come up with a better big picture of the design

  20. Finalizing the Design • Finalize the design • Figure out how the different components will connect • Finalize the material • Ex. bosch vs. Aluminum • Connect with the rest of the robot • Make sure you are doing this throughout the whole process because many of your constraints are due to other components of the robot • Address all the constraints • cost effect, weight, and functionality

  21. Inventor • Put the final design on Inventor • Should be creating inventor drawings throughout but want to make sure to have a final drawing • Purpose: Helps with putting together the design of the entire robot • Helps address problems in specific part of the component of the robot • Helps with Machining • Another Visual of Robot

  22. Machining • Designs are sent to woodshop to be made • Remember, setting up for the process is hardest • Don’t make the machinist re-make a part later because you created the part wrong the first time • Accuracy is the most important thing to remember • Think about what the part is using and how if this one part is messed up how it will affect everything else

  23. Building/Assembly • Putting all the parts together • Make sure the parts are secure • See where parts are weak that you didn’t expect • Maintenance is important here: • Screws and Bolts do come loose as the robot moves

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