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MECHANICAL DRAWING. Why do we draw?. To communicate!!!. Why does it matter?. What’s the use of a great idea if you cant convey it to any one else. No one is an expert at everything, so we must collaborate to reach a common goal. Communication with Drawing (things to consider).

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MECHANICAL DRAWING


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    1. MECHANICAL DRAWING

    2. Why do we draw? To communicate!!!

    3. Why does it matter? What’s the use of a great idea if you cant convey it to any one else. No one is an expert at everything, so we must collaborate to reach a common goal.

    4. Communication with Drawing(things to consider) Subject – what you are trying to convey (Process, structure, function, material, etc….) Audience – who you are communicating with (designer, client, manager, public, other engineers)

    5. Types of Mechanical Drawing Drawing types we will explore today • Sketches • Isometric Drawings • Orthographic Projections

    6. When is a sketch useful? Think about • What (subject) • Who (audience)

    7. – look and feel Sketching

    8. – to show process Sketching

    9. – to explore form Sketching

    10. When is a technical drawing useful? Think about • What (subject) • Who (audience)

    11. Technical Drawing - Isometric

    12. Technical Drawing – Orthographic

    13. Technical Drawing – Assembly section

    14. Technical Drawing – More Sections

    15. Isometric Drawing

    16. Isometric Drawing

    17. Isometric Drawing • front corner is centered and vertical • bottom edges slant up at a 30 degree angle from horizontal (You should be viewing 3 of the 6 faces of a cube) 30° 30°

    18. ISOMETRIC DRAWING • height (“vertical”) lines are always drawn vertically in at their true (or scaled) length • width and depth (“horizontal”) lines are drawn 30 degrees from the horizontal at their true (or scaled) length • all lines parallel to the height, width or depth are at their true (or scaled) length • lines not parallel to these axes are not drawn at their true length height width depth

    19. Isometric Drawing - Dimensions

    20. Isometric Drawing - Dimensions Identify line to dimension

    21. Isometric Drawing - Dimensions Draw extension lines

    22. Isometric Drawing - Dimensions Draw dimension lines

    23. Isometric Drawing - Dimensions draw as many dimensions as you would need to make the part (no more no less)

    24. did anyone have an object that couldn’t be fully expressed with a single isometric drawing?

    25. ORTHOGRAPHIC PROJECTION Orthographic Projection Isometric Drawing

    26. ORTHOGRAPHIC PROJECTION

    27. ORTHOGRAPHIC PROJECTION

    28. ORTHOGRAPHIC PROJECTION

    29. ORTHOGRAPHIC PROJECTION

    30. ORTHOGRAPHIC PROJECTION

    31. ORTHOGRAPHIC PROJECTION

    32. ORTHOGRAPHIC PROJECTION

    33. ORTHOGRAPHIC DRAWING – PLANNING • what is the minimum number of views required to capture every object feature? often the answer is three, but it could be less or more! • what is the best way to lay out these drawings • best use of paper, should drawings be scaled up or down? • we will be dimensioning drawings, so leave enough space around each view to add dimensions • think about the order of inking to avoid smudging

    34. ORTHOGRAPHIC DRAWING – LINEWEIGHTS AND STYLES • thick continuous line – used for visible edges and outlines • thin continuous line – hatching, short center lines, dimensions or projection lines • thin dash-dot line – center lines, to identify the center of a circle or a line of symmetry • thin dashed line – used for important hidden detail, such a hole in a solid or a wall thickness

    35. How do I bring this to the classroom?????? • Use sketching for general design, planning and idea sharing • Look and feel • Form • process • Use technical drawing for final details such as assembly or part drawings for fabrication • Isometric • Orthographic • Assembly