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Intro to Engineering Design

Intro to Engineering Design. Puzzle Challenge. Learning Objectives. Project: Be able to design and model solutions to a problem with a graphical, mathematical, physical and computer model.

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Intro to Engineering Design

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  1. Intro to Engineering Design Puzzle Challenge

  2. Learning Objectives • Project: Be able to design and model solutions to a problem with a graphical, mathematical, physical and computer model. • Today: Be able to generate as many possible solutions to a problem and model them physically and graphically.

  3. Design Brief • Problem Statement: • A local office furniture manufacturing company throws away tens of thousands of scrap ¾” hardwood cubes that result from its furniture construction processes. The material is expensive, and the scrap represents a sizeable loss of profit. • Design Statement: • Fine Office Furniture, Inc. would like to return value to its waste product by using it as the raw material for desktop novelty items that will be sold on the showroom floor. Design, build, test, document, and present a three-dimensional puzzle system that is made from the scrap hardwood cubes. The puzzle system must provide an appropriate degree of challenge to a person who is three years of age or older.

  4. Criteria • The puzzle must be fabricated from 27 – ¾” hardwood cubes. • The puzzle system must contain exactly five puzzle parts. • Each individual puzzle part must consist of at least four, but no more than six hardwood cubes that are permanently attached to each other. • No two puzzle parts can be the same. • The five puzzle parts must assemble to form a 2 ¼” cube. • Some puzzle parts should interlock.

  5. Cube Project: Powerpoint • Title page: Cube project, your name, image • Brief autobiography and your picture • Puzzle Design Challenge Brief • Brainstorming Possible Part Combinations (Activity 4.1a Puzzle Part Combinations) • Isometric sketches of two possible complete Puzzle Cube designs (4.1 b Graphical Modeling) • Justification of your chosen Puzzle Cube design solution • Multi-view sketch, fully dimensioned of each of the five puzzle parts in your chosen design (Activity 4.1b Graphical Modeling Orthographic) • Physical model of your puzzle. • Statistics related to the solution time of your puzzle as required above. • CAD drawings for each part, colored the same as the puzzles you built. • CAD Assembly of you puzzle Pieces • CAD Presentation showing your puzzle pieces fitting together • CAD drawing(s) displaying a fully dimensioned multi-view of each puzzle . • Drawing review comments from a classmate. • A written summary of your puzzle test results and a discussion of the validity of your design. Does your design meet the design criteria? Does your design “provide an appropriate degree of challenge to a person who is three years of age or older” (as stated in the design statement)? (Wednesday) • A discussion of possible changes to your puzzle cube that would improve the design.

  6. Develop Two Models • Create two different puzzle cube designs with 5 parts each. Each part has no fewer than 4 cubes and no more than 6 cubes. • One Easy to solve and the other more difficult. • For each design, neatly sketch and color code an isometric view of each of the five component parts and show how they fit together in the isometric view of the cube. • Choose the best design from the two options. Document the reasons for your choice in your engineering notebook. • Test your designs on • http://illuminations.nctm.org/ActivityDetail.aspx?ID=125 Your Name Today’s Date This class period 4.1b Graphical Modeling

  7. Multi View Model • On graph paper, create a multi-view drawing of each of your five puzzle pieces for the selected design. • Carefully select the best front view and include all object and hidden lines. • Show the minimum number of orthographic projections necessary to fully detail the part. • Do not show the joints between individual wooden cubes. Your Name This class period 4.1b Graphical Modeling Orthographic Today’s Date

  8. Testing Your Model • Exchange your multi-view sketches (preferably copies) with a classmate. • (Optional) Build one or more of your partner’s puzzle pieces using the Isometric Drawing Tool (http://illuminations.nctm.org/ActivityDetail.aspx?ID=125). • Review your partner’s sketches. Consider the following questions for the multi-view drawing of each puzzle piece. Share your thoughts with your partner. • Is the chosen front view the BEST front view? • Has the designer used the minimum number of orthographic projections needed to represent the part? That is, could fewer orthographic projections be used to adequately represent the part? • Are the orthographic views properly shown based on the orientation of the isometric sketch of each piece? • Are the orthographic projections properly oriented to each other? • Are all object lines shown properly (thick and dark)? • Are all hidden surfaces represented with a hidden (dashed) line where necessary?

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