U-Bracket (Part, Torus, Fastener)
This tutorial explains how to model a U-bracket for pole mount antenna in FreeCAD 0.19. Through this example, we will see how to design a threaded part with Part and Fastener Worbenches (WB)
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Step 1: Install Fastener WB (optional)
(optional - if you have not yet installed Fastener WB)
1) Go to -> Tools,
2) -> Addon Manager,
3) Select fastener from the drop-down list,
4) Click on Install/Update.
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Step 2: Create a 180° Torus
1) Go to Part WB ;
2) Create a torus with Torus function ;
3) Configure the torus : Radius1 = 30.50 mm | Radius2 = 2.50 mm | Angle1 = -180 | Angle2 = Angle3 = 180° .
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Step 3: Add threaded rods
1) Go to Fastener WB ;
2) Select one extremity of the U and click on "Add arbitrary lenght threaded rod" as below ;
3) Set up the threaded rod as below : diameter = M5 | lenght = 62.00 mm | thread = true ;
4) Do the same for the other extremity ;
NB : If rod is placed in the wrong direction you can correct with the offset parameter.
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Step 4: Thread representation in TechDraw
Because of the thread, 2D projection of the created part (with TechDraw WB) will not work or take a lot of calculation time for a poor result. Fortunately, Fastener WB allows you to easily hide threads.
1) (optional) If you want to keep a threaded version, save the document in a file with 'Non_Threaded' mention ;
2) Just change thread parameter to "false" to remove threads ;
3) You can now insert a view of the part ;
4) To represent threading, a way can be to use an image processing software, as Inkscape.
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Step 5: Drawing Example
Below you can find an example of drawing for the U-Bracket with TechDraw default template.
1) Functions used to insert views : Insert View - to add five views of the part ;
2) Functions used to place dimmensions : New Vertical ; New Radius ; New Diameter ;
3) To add annotation : Inkscape Software.
