Design and Manufacturing 1

Transcription

1 Design and Manufacturing 1 May 13, 2011 Measuring and Layout Intro to Solid Works Giving Solid Works software to you

2 Measuring Tools: Electronic Digital Calipers inside depth outside pro: easy switching between metric and imperial system con: not necessarily more precise than analog calipers photo: mcmaster.com

3 Measuring Tools: Mechanical Calipers imperial dial calipers: read full inches here read 1/100 of inches here = reading: 1.75 inches imperial vernier calipers: To learn how to read vernier calipers, go to your friendly machine shop staff and ask them again and again until they give up and show you. It will be a painful, unsettling experience driving your intellect towards the limits of its capacity. Once you got it, you will actually find it easier and like it more than stupid dial calipers. However, as you become older, your eyes will fail you and you will switch over to cheap, ridiculously inaccurate digital calipers. photos: mcmaster.com

4 Layout Tools inside and outside calipers dividers scribes rulers squares leveling tools

5 Layout Tools marking, using a divider

6 Layout Tools marking, using a... Sharpie :(( or a scribe :))

7 Scribe vs. Sharp -ie

8 Layout Tools There are many more tools and gimmicks to measure and to lay out work. Check out search for layout

9 From Layout to Fabrication: hold down your work piece even more important with blade-like objects! sheet metal items are notorious for getting the drill stuck and becoming a lethal rotating knife! ALWAYS CLAMP!

10 From Layout to Fabrication: hold your work piece in a vise hold your your vise with a clamp!

11 Woodwork? We do have a wood shop! Location: Hennings (Basement) access only with supervision

12 Technical Drawings a way to communicate what needs to be done try to have everything relevant while not overloading the drawing with information tolerances/ references/ allowances naming: choose names that make sense include: scales, materials, features sometimes, context of the part is helpful to know metric or imperial dimensions? (Go metric if you can)

13 Instead of making drawings and then make parts from them, we make (virtual) parts, and can generate drawings from them. If we still need drawings. Sometimes that step is skipped, and real parts are made directly using data from virtual parts.

14 Getting started: Setting up your workspace - Choose ISO and mm, gram, second if it asks you Default menu visible after choosing new part - Command Manager Recommended menus: - sketch - features - tools - reference geometry - sheet metal To pick your personal menus and set up your workspace, right-click on the empty useless space in your windows-window (E.U.W.W.S.) up on top of the screen that every windows user is endowed with regardless whether they want it or not.

15 Setting up your workspace - there are more buttons than you think! - drag and drop to make your very personal menus. - activate SW Simulation: tools add-ins and check both activate and start-up buttons to make sure it always starts SW needs lots of resources. Free some on your computer by going to system. advanced.. performance.. adjust for best performance Run msconfig and do a selective startup, getting rid of lots of junk your machine might be running in the background. (keep your virus scanner) Restart often. Windows likes that.

16 Solids: Extrusions are not all the same - Boss-Extrude? - Sheet Metal? Looks like an extrusion, kind of. Sheet metal can be bend, the other can t Boss-Extrudes can have lots of copied and patterned features, sheet metal parts will give you error messages Why sheet metal? Can be saved as DXF files (=Drawing Exchange Format) for Omax Will flatten bends automatically when saved as DXF

17 Making Parts: - blue lines: bad - black lines: good (defined vs. under defined) - use relations and auxiliary lines to define lines and drawing features When making more parts by using save as copy, beware: There is a button that you have you check to make sure the part you are making the copy from won t be replaced in your assembly by the new part that you are making from an old one.

18 Solids: Extrusions are not all the same - Name parts for what exactly they are - Keep old files to make sure you can revert to older versions if things don t work When exporting DXF files: - Name DXF files that are destined for waterjet or laser cutting as follows: 3x steel 0_7mm leg = telling that you want 3 pieces, from steel sheet metal that is 0.7mm thick, and in the context of what you are doing this is a robot s leg. It s also a good idea to know the overall dimensions of your part, and/or to mention that in an if someone else will cut it for you. Like: 3x steel 0_7mm leg..part is 400mm long and 50mm wide

19 Other good systems to keep track of what you are doing are folders named for years, months, and dates of when things were made. Companies will freeze designs at certain times to make sure earlier products can be reliably repaired and maintained.

20 Assemblies - always assemble things the same way you would in reality. - align bolts concentrically to holes, giving rotational freedom - use advanced alignments and mates to define limits of motion, angular limits, gear ratios and more. - see the tree to the left for information about parts being fully fixed or not - tree can be partially undone by dragging the below line upwards Don t put assemblies together and leave parts hang in mid-air. You might think everything fits and works just fine, but in fact it does not.

21 Simulation.. We really hope you free d up some system resources earlier.

22 Solid Works tutorials can be found here:

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