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JEM-171: Intro to CAD Fabrication A quick overview.

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Presentation on theme: "JEM-171: Intro to CAD Fabrication A quick overview."— Presentation transcript:

1 JEM-171: Intro to CAD Fabrication A quick overview

2 JEM-171: Intro to CAD Fabrication As a Designer you need to know how things can be made. The selected fabrication process affects how you design your parts. Important choices you make: What material(s) are your parts to be made from; ferrous or non- ferrous metal, plastic, wood, composite, sheet material etc.? How many are you making? What are the design constraints: Precision, tolerances, fits. Allowable features such as undercuts, section thicknesses. Will you need tapers, fillets, ribs. You must understand and take into account the limitations of the fabrication techniques and machinery that are available!

3 JEM-171: Intro to CAD Manual machining Requires a highly skilled operator. Constant attention to operation. Labor intensive, SLOW! Difficult to achieve accuracy. Limits to kinds of operations. Error prone. Lower cost machines/tools.

4 JEM-171: Intro to CAD Automated Fabrication: CNC and CAM CNC = Computer Numerical Control, CAM = Computer Aided Manufacture Minimal operator training. Requires programming. Operations are mostly automated. Minimal labor. Can be highly accurate, fast. Can perform multiple operations in one setup. Errors are rare. Machines are expensive.

5 JEM-171: Intro to CAD Subtractive vs Additive Subtractive Fabrication: ◦Create a part by selectively taking material away from source material (billet, sheet, block, strip). ◦Often involves cutting and/or reshaping. ◦Examples: Milling, Drilling, Turning, Sawing, Chiseling, Stamping. Additive Fabrication: ◦Create a part by adding material to form a whole. ◦The material is often in pellet, filament, powder or liquid form. ◦Often involves heat or solvent to shape/meld/adhere. ◦Examples: Molding, Casting, Extruding, 3D Printing, Sculpting.

6 JEM-171: Intro to CAD Subtractive: Multi-axis machining

7 JEM-171: Intro to CAD Subtractive: Progressive Die Stamping

8 JEM-171: Intro to CAD Subtractive: Forging

9 JEM-171: Intro to CAD Additive: Injection Molding

10 JEM-171: Intro to CAD Additive: Die Casting

11 JEM-171: Intro to CAD Additive: 3D Printing

12 JEM-171: Intro to CAD What machine/process would YOU choose? Material: Steel Quantity:1 Material: Aluminum Quantity:5 Material: Zinc Quantity:30,000

13 JEM-171: Intro to CAD What machine/process would YOU choose? Material: ABS Quantity:10 Material: Stainless Quantity:5,000,000 Material: Stainless Quantity:5

14 JEM-171: Intro to CAD What machine/process would YOU choose? Material: Styrene Quantity:10,000 Material: HDPVC Quantity:500 Material: Bronze Quantity:50

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