How to replicate sketch/extrusion across faces of extrusions from circular pattern?

tim_lienke

Hi there,
in the document below I am designing a cable cover for ceiling cables. The cover will clamp to the inside of the ceiling cable hole with three pins. To get the tension for the clamping I want to add some small extrusion to the pins inserted into the hole. The pins themselves are extruded from a circular pattern on the top plane. The question now is, how do I replicate the sketch/extrusion across the faces of the pin extrusions?

Thank you for your help!

Cheers,
Tim

Document link:

https://cad.onshape.com/documents/e1346bb53cd2cea7ec0548cb/w/64798715f91ffdf83bd5e9d3/e/4a070c6f181803267ba651d7?renderMode=0&uiState=6762b34ce189727eb43cd4b0

The_M100

It appears as though you solved your problem. Is this true?

tim_lienke

Honestly, not really. I got impatient and just manually added sketches 4 & 5. That does not seem like a good approach, since if I would change the circular pattern repetitions on sketch 1 it would break I assume.

What I wanted to achieve is to basically duplicate sketch 2 onto the faces of the extrusions from the circular pattern in sketch 1. So that if I change sketch 2 it would automatically propagate to those faces.

eric_pesty

Use an actual circular pattern feature (instead of drawing each pin)!

tim_lienke

@eric_pesty thanks for responding. I do not quite follow what you mean. My best guess is that you are trying to tell me to not draw the pins in the base sketch (1), using the sketch circular pattern tool.

Instead:

• I should add them as a separate sketch on a different plane
• Extrude that (as a new part)
• Use the circular pattern on said part ("Use an actual circular pattern feature")
• And finally boolean it all together?

Is this a correct assumption? At least, that is what I came up with after thinking about it more. That still gives me a potential issue that if I adjust the instance count in the circular pattern additional parts will not be part of the boolean.

jelte_steur814

Hi Tim,

this is already an improvement.
Just use the 'add' tab in the circular pattern. no need for an additional boolean feature.

else use @GregBrown's featurescript called Auto-boolean.

In this case though, if you still want to add fillets etc, you shouldn't have to do that to every snap.

So the optimal approach would be to only draw one piece of the pie and pattern it at the end:

create a variable "n" with the number of snaps you want.

the first main shape could be made with a revolve. (symmetric, revolve angle=360/n)
in this case (with no revolve) you could intersect extrude a pie shape with 360/n angle.

add the snap hook. fillet and finish it as you wish.

then circular pattern the whole part using n as the instance count.