TFI - CADTips Challenge

[TheCADWhisperer]

@Neil_Cross posted a fun challenge over on his channel this morning.

I just modeled this in Inventor and then gave a few minutes of thought to how I would model it in Fusion 360.

It is pretty easy to model in Inventor, a few minutes of thought is all I needed to decide that it wasn't worth my effort to attempt to model in Fusion, but I would love to see the technique used by someone with more Fusion 360 experience than I.

https://www.youtube.com/watch?v=kc5hpLR8edQ&t=153s

[TheCADWhisperer]

...and my SolidWorks solution.

[Neil_Cross]

Interesting... so Solidworks didn't return the exact same property values? That's a nuisance, not sure how to police that.  Thanks for that though.

BTW the reference angle dimension was the hint towards which bend order should have been used, the 'correct' bend order also returned a different end solution on the part which is also visible on the drawing.  That was an intentional gotcha to get minds ticking.

[colinNJB25]

Sweet! I learned a ton. Thank you!

[TheCADWhisperer]

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@Neil_Cross wrote:

Interesting... so Solidworks didn't return the exact same property values?

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I hadn't used Flex before in SolidWorks and fumbled a bit on setting the triad while recording the video.

After creating the video I spent a bit more time experimenting with Flex and intended to record a new video of just that portion.  Once I get a chance - I will record the new video with a better understanding of Flex, but it did still result in slightly different volume and area.

[michallach81]

My go with SW, just ignore mass, since I didn't care to create new material:

[davebYYPCU]

Originally was not far off it, but I can't match your properties, have reviewed every dimension, but it's off a tad.

[michallach81]

The key is K factor in SM it must be 0.5 if you extrude symmetricy as Neil did.

[davebYYPCU]

Made no difference.  I have double checked everything.  but have features that were not built the same way.

3 sketches, 2 extrudes and not 4, etc.

[michallach81]

I also have a different order of features, but that's irrelevant, can you share your file?

[davebYYPCU]

Sure, 2nd pair of eyes, but it's not that far away.

[daniel_lyall]

@michallach81  it was a surprise that sheet metal was used I was sure it was done with surfaces.

[Neil_Cross]

@davebYYPCU You've fell victim to the "gotcha" that I baked into the challenge, if the bend order is done the opposite way to how I did it, you end up with a different end solution on the part.  The end faces should be angled but you can see yours are parallel 

I put a reference angular dimension on the detail drawing which was supposed to act as a hint towards spotting that.

[davebYYPCU]

Yeah, that would do it, I saw that you used the long axis first, you told me so, and I still got transfixed...

Thanks, and please keep them coming....

[michallach81]

There's no way to mimic those fillets and chamfers after the bend with current tools.

You must know that short-end chamfers after "Bend" are not planar faces, nor cones, but very specific curved in both direction surface.

[daniel_lyall]

I was 133.669 grams the fillets, chamfers and outside, edges would have been where it went wrong.

[michallach81]

Few posts before I show my model without SM, and most with solid modelling just very little of surfacing to do those chamfers. You can compare values, the same drawing once again:

[davebYYPCU]

Dan I got that 133, before updating to Stainless.

reversed the bend order all fixed.

[daniel_lyall]

That would be it as well I did short then long for next time something like this comes up I know how to do it in a way that really works or I could just use inventer since I know that way now.

It is fun and a good way to learn It is harder to do than game calls or wheelchair add-ons. 

[TrippyLighting]

We've seen how to do this in Fusion 360, Inventor and SolidWorks. Here's my ZW3D version:

[etfrench]

Since the bend order changes the results, it's not possible to say that either is an accurate answer. The more likely answer is there is a bug in Inventor and Fusion 360.