Sheet metal - Heavy perforation modeling

lukas_szwugier

Hello Community 

I need to post some topic that i recently hit and didn't find solution in the end.

I was ask to make some heavy perforated sheet plate witch was bended "curved" for purpose of the maschine.
It finally look like on pic under. I was not able to make it in onshape i have to backup myself by other software where i made it quite fast. For those that interested it was SolidWorks.


Unfortunately i try to make similar part in Onshape but it fails.

First i started by make some Sheetmetal part , then on flattened state i make extrusion of hole, after that i think to make pattern but it is not possible for flat pattern to make it so i think make it in sketch.
And then happened . Pattern in sketch are fun and easy when you have small amount of objekt, but when you need like in my example need whole bunch of them to be specific 2674 holes things appear much tricky.
After few tryouts i make my partstudio go stuck, some error appears with message to contact support.

I have these ideas to make pattern before conversion to Sheetmetal but it all falls in the end. 
For example:

1. I think let's make "wrap" but wrapp works only to cylindrical surface/parts and here i have some plat segments , and that didn't work
2. I make export of part with one row of holes and think let's make pattern of faces and then convert to Sheetmetal. Nope! that didn't work either, on rounded face linear pattern didn't work as well.

My question is do you have such model to make in you experience or maybe someone have different approach to such specific modeling?

Thanks for all ideas

martin_kopplow

This looks similar tp a question about a perforated basket I answered a few minutes ago. There, I used the modeled part and created a simple hole sketch, driven by variables, then used a curve pattern to propagate the holes all along the part. 

https://forum.onshape.com/discussion/23828/how-can-i-create-a-curve-pattern-with-holes-around-a-basket#latest

lukas_szwugier

Hi Martin 

Great example
I didn't thought about that approach to problem i need to dive more in to that and make some samples and check if this will resolve problem that I hit

I am curious what regeneration time will be in that solution.
I will reply when it will be done

Thank you kindly

martin_kopplow

I tried it quick and dirty: It'll work, though it'll also bring OS to it's knees ... :0/

This has about 6700 holes and took about 5 minutes to process:

https://cad.onshape.com/documents/f4fd64489af399604cde7516/w/a9710136d15883f34a33ace0/e/e4a24aa895e316ee414dabc0?renderMode=0&uiState=6627a8d7314dd37c69781c3a