Materials and Manufacturing. Materials Modern Manufacturing Techniques Techniques for ME1720

Transcription

1 Materials and Manufacturing Materials Modern Manufacturing Techniques Techniques for ME1720

2 This Week: Lecture Common Materials Basic Manufacturing Processes Tool Info and Demonstration Videos Lab Proof of Concept #1 Due Assign Proof of Concept #2 (Due week 9) Software Module 2, week 2 Complete the second assignment/quiz for your software choice (must be the same software as last week)

3 Software Reminder By popular demand, all tutorials have been made available The tutorial for the current week will be marked by arrows <<< You can work ahead, but you must submit the assignment/take the quiz during the week it is due You cannot submit assignments early, hold onto them until the correct week

4 My team has decided on our first proof of concept. A. True B. False 0% 0% True False

5 Today s Topic: Materials and Manufacturing 2 key questions: What is it made of? (and why) How is it made?

6 Woods Pros: Light, easy to obtain, cheap and easy to work with Cons: Poor tolerances, orthotropic properties, inconsistent, low-strength What you can get here (Meeks, Lowes, Wal-Mart) SPF (spruce-pine-fir group) used for framing lumber (studs) Balsa Hardwoods (oak, walnut, etc.)

7 Metals Many options: Iron-based (cast iron, steel, stainless), Aluminum, Titanium, Magnesium, Tungsten Pros: High strength, numerous selections and grades, conductivity (thermal, electrical) Cons: Heavy, harder to work with, can be expensive, hard to get exactly what you need here in town

8 Steel Most common metal used in engineering Many series 10xx Plain carbon 41xx Chrome-moly 43xx Nickel-chrome-moly Stainless (w/chromium) 200, 300 austenitic 400 ferritic 600 (17-2) - martensitic

9 Aluminum Good strength to weight, easier to machine than steel Wrought (forged), properties vary widely on heat treatment 2024 common, high strength, no weld 6061 high strength, weldable 7075 high strength, no weld Cast xxx.x (150.0, 150.1)

10 Plastics Bakelite (phenolic) one of the first commercial plastics Polyethylene common household items High density (#2): milk jugs, shampoo bottles, cleaning supply bottles Low density (#4): Plastic bags Polystyrene (#6) foam, food containers Polyvinylchloride (PVC, #3) construction, pipes Nylon household, some engineering applications Acrylonitrile butadiene styrene (ABS) light, rigid, household products, some engineering, material used in many 3D printers

11 Ceramics Inorganic, non-metallic materials Typically hard, brittle Formed by heat (chemical reactions, sintering) Clay (pottery, porcelain, etc) Glass (amorphous solid) Cement, concrete

12 Composites Combinations of materials: Cermets ceramics and metals Fiberglass glass fibers and plastic matrix Carbon fiber carbon + plastic matrix Particle board wood + glue

13 What material(s) do you intend to use for this project? (multiple answers allowed) A. Wood B. Metal C. Plastic D. Ceramics E. Composites F. All the materials 17% 17% 17% 17% 17% 17%

14 Manufacturing Processes Subtractive Cutting Milling Turning Additive Welding Rapid prototyping/3d printing Shaping Forging Molding/Casting

15 Subtractive Milling Manual or automatic (CNC computer numerical control) Cutting Sawing Laser cutting Water jet cutting Electric Discharge Machining (EDM) Turning Lathe, manual or automatic (CNC)

16 Additive Net shaping Rapid prototyping, 3D printing Welding epositiontechnologyadvancesadditivemanufact uringandrepair.aspx

17 Shaping Forging Molding/Casting

18 Water jet cutting is a/an manufacturing process. A. Additive B. Subtractive C. Shaping 0% 0% 0% Additive Subtractive Shaping

19 Lego Bricks What material is used for Lego bricks (be as specific as possible)? Why do you think that material was chosen? How do you think they are made?

20 The primary manufacturing process used to create Lego bricks is: A. Laser cutting B. Molding/casting C. Milling D. Welding 0% 0% 0% 0%

21 Clothespins What materials are used for clothespins? Why do you think those materials were chosen? How do you think they are made?

22 Drill Bits What material is used for drill bits? Why do you think that material was chosen? How do you think they are made?

23 Tools in the ME1720 Shop Saws Band, jig, scroll, reciprocating, circular, chop Drill press Cordless drill/driver Dremel rotary tool + attachments Hand tools Saws, hammers, wrench sets, measuring/leveling, clamps, screwdrivers Soldering irons/multi-meter Glue gun

24 Most important tools: Safety glasses Cleaning supplies Brooms Dust pans Shop vacs

25 Safety glasses must be worn when working in the shop A. True B. False 0% 0% True False

26 Reminder: ME1720 Shop Hours Monday: 4-8 pm Tuesday: 4-9 pm Wednesday: 4-8 pm Thursday: 4-9 pm Shop location: IDE building room G3E

27 3D Printing at S&T Library See posted info on the IT website: File requirements Cost Size limitations/minimum thickness Helpful resources

28 Tool Demonstration Videos See the shop page of the course website for numerous tool demonstration and manufacturing process videos Band Saw Please be safe!