Offset cut inwards from a curved surface help

[Anonymous]

Hello,
I am very new to Fusion 360 and have been struggling to finish my project in time whilst learning as I go so I apologize in advance for my lack of knowledge in CAD. I have a compression mold I am making and need some help.

I have the “female” mold model completed. I am trying to create a male mold that fits inside the female mold but leaving an even 1/8” cavity only within the geometry of the part I am making from the molds. I have a “male” mold model that fits snug within the female mold. So right now I have two perfectly mating halves. My problem is offsetting the part geometry inwards 1/8” from the male mold. So there can be a gap betthe two molds on the inside. Every time I try splitting the face or cutting or offsetting inwards I get an error. I can email anyone willing to help me the part files. Thanks so much for any feedback!!

[davebYYPCU]

Can you attach the file here, there are various guys around the globe that pitch in, might be quicker, is easier to work with your data.

File > Export to your hard drive, and attach in this system.

The devil is in the detail, depends on the actual shape, but I would go into Patch Mode, 

see if Create > Offset will do it.

Or Shell the male for a skin that thick, then fill the cavity with a new body, 

couple of ideas....

[Anonymous]

Thank you Dave!! 

So I uploaded three files. I should add that the shoe is not symmetrical so that is why the female mold is the left and right half of one shoe. The male mold is only one half of the shoe but the final product will be both halves that mate into the female half leaving a 1/8" cavity for part thickness. Thank you so much to anyone that can help me with this. I am currently playing with the Patch method.

[davebYYPCU]

Nope not working for me with the stuff I know, 

Fusion was taking five to ten minutes to work out why it can't be done in the current file.

Sorry, maybe a 3d guru can help....

[Anonymous]

Thanks for trying Dave, I thought it was just my computer being slow but the same thing happens to me.

[jeff_strater]

I took a look at the shoe model.  I tried offsetting just the outside surface of the shoe.  It resulted in very strange geometry:

if you turn on zebra stripes, you can see more clearly the funkiness of this geometry:

Then, I looked at the shoe model itself.  I can see some strangeness if I look at the curvature map:

Also, there are a couple of sliver faces at the front of this model:

This is likely the source of why it takes so long to try to offset this body.  Where did this model come from?  The geometry here is pretty bad.  I spent 1/2 hour trying to clean it up, and was not able to make any progress.  It might be easier to just re-create this model using native Fusion commands - then you should have no problem with the offsets.

Jeff

[Anonymous]

The model came from SolidWorks originally and I do not have any of the part history to change geometry in it now. Thank you so much for helping clean it up and trying to get it to work. I know this project would definitely be out of my league to recreate the heel in Fusion 360. Is there a chance you’d be willing to do it for me if I paid you? I’m desperate to get this project completed and my knowledge of CAD is very minimal. As much as I try to follow tutorials I end up at dead ends more often than not. I would just need the basic dimensions to stay the same since it was made and has already been 3D printed and tested to fit a woman’s foot well.

[TrippyLighting]

Looking at @jeff_strater's images and having looked at this model myself, this model has a number of pretty terrible surfaces and edges with terrible curvature.

If you post the original SW file or whatever file format you have that you imported into Fuoisn360 file (PM if privacy is needed) I can take a look at it.

[laughingcreek]

I took a quick stab at rebuilding it in fusion.  Not perfect, but in the "pretty dang close" range.  I just did the shoe, and made a version that is 3mm (about 1/8 inch ) all the way around. 

[jeff_strater]

very nice @laughingcreek!  I would say that is a pretty accurate version.

Jeff

[Anonymous]

Laughingcreek you did an amazing job!! I am flabbergasted!! Thank you so much for that, i have been searching through the part tree and trying to figure out how you recreated it so well. That is amazing and i am extremely grateful. I dont have a whole lot of money but i can PayPal you some because i really appreciate your work and for time to help me out. This was exactly what i was trying to achieve. Again, thank you so much!!

[Anonymous]

Thank you TrippyLighting, it looks like Laughingcreek made a really good recreation of it already, but many thanks for being willing to help me out!!