Putting countersunk holes on a wrapped part around a cyclinder

terry_schumacher
terry_schumacher Member Posts: 4 ✭
in Community Support

I have a cylindrical piece that I want to add a lens (which will have an LED strip in the lens). I want to use countersunk screws to attach the lens to the cylinder body.
1. How do I create countersunk holes on the Lens (in grey)
2. How do I extend the holes into the body (in blue) who they will be tapped when I 3d print the body.

image.png

https://cad.onshape.com/documents/76a23c08609acee7752f555b/w/5cef716fd78c28d6e8aac42c/e/540056ab2b7cf18ebf1ccac5?renderMode=0&uiState=67e065e748d9c8025a87621d

Thanks in advance

Terry

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Answers

  • glen_dewsbury
    glen_dewsbury Member Posts: 1,377 PRO

    Here is sample of one of the ways to do this. Including the holes with the wrap causes some distortion(stretching).

    https://cad.onshape.com/documents/fe0d45038bf2628fdfada069/w/a3913ceb0eaabf791fea09ed/e/84f54dc063de1db5910287b0

    image.png
  • terry_schumacher
    terry_schumacher Member Posts: 4 ✭

    @glen_dewsbury

    Thanks for the quick reply. I have a few questions before I admit it is solved, even thought It looks like it is.

    I want to verify the steps and why so I'll know next time.

    1. You altered the wrap so you selected the entire Lens Outer Edge Sketch, NOT including the wholes I had.
    2. You create Sketch1 based on a MP you placed at the top middle edge of the Wrap 1 (Lens).
    3. On this sketch (Sketch 1), you then created a construction line thru the center line of the part for each set of holes I had draw. (I'm not sure where you got the angles?)
    4. You created the 5 holes (the 2 end holes and the three that were along the side) by creating an MP based on the construction lines from Sketch 1.
    5. You then did a Move face to move the middle three holes to one of the sides. I've never used the Move Face command, I'll have to read u on that.
    6. You then mirrored the three holes you moved in the previous step along the center line of the part based on a MP

    I see I need to learn a lot more about MP's to be able to use them like this.

    Thanks again for the quick reply.

  • glen_dewsbury
    glen_dewsbury Member Posts: 1,377 PRO

    MP? MC (mate connector) They're worth studying since they can speed things up and eliminating planes in the feature tree. https://cad.onshape.com/help/Content/mateconnector_a.htm?Highlight=mate%20connecter'

    That's not angles but arc lengths taken from your flat sketch.

    image.png image.png image.png

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