Weekly Challenge Group

I would have like this challenge better if the geometry of the curved surface was fully defined. As it is, there are several ways of defining the geometry of the corners and the transitions between curved and flat areas, so the job becomes a choice of personal preferences rather than a challenge.

I made a meshed washer for nozzle to separate dirt from water.

MESH WASHER | 3D CAD Model Library | GrabCAD

I guess the challenge can be made somehow with similar process

So feel free to take a corner execution of your choice. Trying and sharing with others in the community is what counts. This is how we can all learn.

Forget the grid pattern for a moment, there's insufficient information about the overall shape of this part.

Are the two upper views sections through the center of the part? Are they side views? There are multiple way to interpret these views.

Like Steen, I find the drawing rather ambiguous.

Here are my results:

I also did one in sheet metal with a form tool that I made. Same results, different approach.

Harder than it looks. Inventor

Hey Bob, I originally modeled it like that as well, but the instruction to pattern the grill in the flat will yield a different result than illustrated. Instead of the squares cutting straight through, they will end up normal to the curved surface. I believe normal cuts are the intended finished part. If you look from the top, I believe it should look like this:

From a manufacturing standpoint I totally agree with you. Something more like this:

Exactly.

I think the "intended" result is that the holes follow the curve.

Are you all creating a flat pattern, then using a Deformation tool to curve it? Something about the previous examples don't look right to me.

Specifically in the top views where the border around the hole pattern does not have straight lines. Instead they appear to bow.

Also, I think most of sidewalls of the holes will be visible from the top view. The curvature is not great enough in most locations to present a perfectly clear hole pattern like the flat pattern in the "drawing" gives.

It's not difficult to make perfectly aligned holes with no sidewalls showing but it is time consuming. Especially when modeling a mesh like this would rarely be done for a production item.

Sorry for that unclear challenge. I tried to contact the autor of the drawing but without success. I´m happy to see your spontaneity and improvisation.

If the deformed surface is the correct thickness, the intersection with the flat edges would be a bowed line. Either on the top surface or the bottom or both, but at least one must be bowed.

I set the lower concave surface to the dimensions. So on mine, the bottom is straight, the top is bowed.

[edit] If you were to turn on your hidden lines and look at the lower surface I think you would see that it's bowed.

I added those filets in mine to the top. It was a personal interpretation of the part, based on my experience in the industry with punched/stamped sheet metal. There is almost always a radius, even if barely visible, but as Bob said, it could be on either the top side or bottom side.

To keep things simple I didn't add filets.

I updated my drawing above with a detail view showing the offset in the upper and lower surfaces to explain the bowed line.