Alternative to sweep-solid?

laird_broadfield

I've made a demo model of my issue; picture below, link at the bottom..  My challenge is getting the blue cuboid to be liftable out of the gray block.  If I could part sweep, I'd just sweep remove it straight up.  If I could project the surfaces up to Plane 2, I could extrude-remove down to the part -- but I can't project the surfaces of the blue -- just the vertexes and edges, which doesn't get the outer extents.  Alternatives?  Thanks.

(At one point I tried linear replicate step 0.1 count many many -- but that does odd things and eventually crashes the engine.)



https://cad.onshape.com/documents/6df999b835a7475f5e010206/w/7f866f72f51b6a495efe1629/e/f31e2e11ee3f2c84a10b19a5

--Laird

konstantin_shiriazdanov

@mbartlett21 discovered a cool function that can create a projection profile and made a custom feature for it.

check the example - https://cad.onshape.com/documents/acd7fcc17cf5efdde2b30c5e/w/4cdf2635497764e1cbc86beb/e/fde22c0a8c5be2b467f6f95a

bradley_sauln

@konstantin_shiriazdanov great find! I used that and took it one step further to still have a nice cradle, assuming you wanted the part to sit within the solid. I was unable to get the extrude > Up to part to work (which would have been ideal for the desired end result) so instead I extruded up to the lowest vertex to ensure there was no overhang and then did a boolean subtract. https://cad.onshape.com/documents/6298673e8263004aa0e06618/w/dd9f7781a7e9975407b7b4c0/e/195775e2841420c66cdc9e73

MBartlett21

@konstantin_shiriazdanov
It is the feature used In sheet metal for boolean subtract 

laird_broadfield

bradley_sauln said:

@konstantin_shiriazdanov great find! I used that and took it one step further to still have a nice cradle, assuming you wanted the part to sit within the solid. I was unable to get the extrude > Up to part to work (which would have been ideal for the desired end result) so instead I extruded up to the lowest vertex to ensure there was no overhang and then did a boolean subtract. https://cad.onshape.com/documents/6298673e8263004aa0e06618/w/dd9f7781a7e9975407b7b4c0/e/195775e2841420c66cdc9e73

That would be just right -- if the UpToPart worked.  Not clear why it doesn't. 

mahir

@laird_broadfield
It's a bit of a kluge, but I replicated the up-to-part so it looks more like a true linear solid sweep. The cuboid is now 100% cradled in the block. There is a .01mm surface offset to allow the split operation.

https://cad.onshape.com/documents/0ffeacf7cbaba5fbaee8fda3/w/e53eaa41a9347b56e0908031/e/a4677fd561e5a6183ec0b8d2