topic Re: sheet metal mitered corner in 3D Part & Assembly Design

sheet metal mitered corner

pshepherdson — Sun, 13 Dec 2020 10:20:07 GMT

Hi All,I know I'm missing something. What is the best way to get these flages to be a nice meeting (say a 0.010" gap) mitered corner?I've adde a flat, trapezoid to one flange, then the same to the other. But I'm left with a gap I cannot really modify. Can't extend

Re: sheet metal mitered corner

gšvigelj — Thu, 30 Oct 2014 06:04:24 GMT

For this part I would use "double shell" method. First shell is made in solid part, second shell is for conversion to sheet metal. First shell thickness defines flange size. Conversion feature is used for edge rips and rip connects.

When creating flat wall you have at corner of the bend line a white box which can be used for extending and shortening.

Extend feature is a bit strange, to use it you must first change selection filter (on the lower right corner of main window) from Smart to Geometry. Then you select the edge you want to extend and the feature is available.

Re: sheet metal mitered corner

magnus.salomons — Thu, 30 Oct 2014 07:03:02 GMT

I prefer using the Flange Wall feature in Sheetmetal as this can be used with a Surface Loop.

Create a Planar bottom. Select one edge then while pressing Shift key click on bottom surface to select Surface Loop.

In Flange command select User Defined from drop down list and Sketch as below.

You gan adjust edge corner gap as in pic under Edge Treatment. Select all edges using Shift key before changing. If you select Blind there will be no gap.

Re: sheet metal mitered corner

pshepherdson — Thu, 30 Oct 2014 19:59:12 GMT

Thanks Magnus,

Am just tryign this, but I've noticed that Creo craps out when the angles aren't 90°. In my particular case, this methods works until the 3rd edge. it's not 90° to its neighbor, more like 150°.. It looks like the bend radii run into each other & don't play nice..

So, back to solid, shell, conversion, and then add my flanges & miters by hand.. that works. this, no.

Re: sheet metal mitered corner

magnus.salomons — Fri, 31 Oct 2014 02:37:44 GMT

Not sure what you mean with "craps out". To me it seems that the differences are pretty minor but it just might be my view. Here's a comparison between the two options. Grey model is Shell Conversion and Red model is Flange Wall.

Re: sheet metal mitered corner

pshepherdson — Fri, 31 Oct 2014 12:37:11 GMT

Hi Magnus,

Try a corner that's not 90°. Try a corner that's greater 120°

Try this, as it's close to waht I'm trying to get. make a 5 sided planar flat to start. it's about 36" X 40" with a the short part at about 4". See Picture.. Then try the sweep flange. The littel short section near that ~150° corner is where it fails. I can do it from a solid, but not a swept flange. As I've mentioned, anything over 90°, Creo seems to crap out / dosen't know what to do / can't figure out how to lay a bend radius..

Re: sheet metal mitered corner

magnus.salomons — Mon, 03 Nov 2014 02:40:57 GMT

Hi Paul,

Ok, now I see what you're trying to do. I wasn't aware that the Flange Wall had these odd limitations. It's not the angle itself but a sort of symmetrical shape is necessary. A hexagon is possible and you can twist it a lot as in attached pic but if I have one straighter corner it won't work. Very odd.

Would be interesting to hear a reply from tech support....but my guess is that it would be 'intended functionality'.

Re: sheet metal mitered corner

pshepherdson — Mon, 03 Nov 2014 18:05:13 GMT

Thanks Magnus,

I know it's not me then!! (Nice to know!). Thank you for your help & confirmation. Now, to contact tech support!

Re: sheet metal mitered corner

pshepherdson — Thu, 06 Nov 2014 14:30:50 GMT

I think I fixed it. It's an accuracvy issue. When I set the accuracy to 0.0001, it seesm to work..

Re: sheet metal mitered corner

magnus.salomons — Mon, 10 Nov 2014 02:24:23 GMT

Are you talking about Absolute or Relative accuracy?

The default shtmtl templates (startpart) in Creo has an absolute accuracy of 0.0125. I tried changing this as low as possible which was 0.0033 but it's still failing.

The feature acts very strange. I created a rectangular planar with three chamfers.

I edit the Chamfer feature and add a fourth chamfer.

The Flange Wall feature fails.

I edit the Flange Wall but all references are valid. I also checked that they are in correct order, by switching from rule-based to standard, and they are.

If I delete the Flange Wall feature and recreate it again with the same references, same edge and surface, it works....

Re: sheet metal mitered corner

pshepherdson — Mon, 10 Nov 2014 13:22:36 GMT

Good morning Magnus,

The accuracy in the model properties. We have ours default to .0012", but if I change it to 0.0001", then it works. I keep forgettign this little "feature".

I still conscider myself "new" to Creo / Pro E, and am still tryign to figure out how it "thinks"!

Re: sheet metal mitered corner

Dale_Rosema — Tue, 24 Feb 2015 19:39:31 GMT

MAGNUS SALOMONSSON

Do know if this is doable in WF5.0?

And also with an exterior flange instead of internal?

Thanks, Dale