Aidan Williamson Log
Old Logs:
- Aidan_Williamson_Log_2015-2017
- Aidan_Williamson_Log_2014
- Aidan_Williamson_Log_2013
- Aidan_Williamson_Log_2012
November 2018
11/20
I've been working on a cad file for the Open Source Cylinder. Here is a link to the alpha stage of the file.
File:Universal Cylinder Builder ADW.FCStd
The end-caps are square with a trepan machined for the tube to seat. The caps could potentially be parted so that a welding operation replaces a machining operation for the tube seat. The Rod is welded to the Piston in my version.
Like the universal tube builder, I'm trying to make it parameterized from a spreadsheet. Here is what the parameters look like right now:
Name Input (Inches) Output (mm) Note Cap Side Length 4 50.8 Cap Thickness 1 25.4 Tube OD 3 38.1 Tube Wall Thickness 0.25 6.35 Piston Thickness 1 25.4 Piston Seal Inner, Height 0.3125 7.9375 Piston Seal Inner, ID 2.125 26.9875 Piston Seal Inner, OD 2.5 31.75 Piston Seal Outer, Height 0.25 6.35 Piston Seal Outer, ID 2.125 26.9875 Piston Seal Outer, OD 2.5 31.75 Stroke 12 304.8 Rod OD 1.5 19.05 Rod Stickout 2.5 63.5 Cap Seal Outer, Height 0.25 6.35 Cap Seal Outer, OD 2 25.4 Cap Seal Outer, ID 1.495 18.9865 Cap Seal Inner, Height 0.25 6.35 Cap Seal Inner, OD 2 25.4 Cap Seal Inner, ID 1.495 18.9865
Need to add a few parameters like tie-rod diameter. I think the model may need to be scrapped. Especially if one looks at the dependency graph lol. I didn't take as intentional an approach to modeling it as I could have.
I believe it is a worthwhile effort, though. A user could generate the CAD for a cylinder of different sizes by simply entering data into a spreadsheet.
11/5
Here is a file that might be helpful for y'all. Open the Universal Tube Builder file and use the spreadsheet to create tubing with all dimensions parametrized. Holes will automatically be set to 4" spacing. I can change that if you want. You can define the standoff for the first hole.