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bponnusamy1-Visitor
1-Visitor
February 6, 2017
Question

Sheet metal Punch

  • February 6, 2017
  • 3 replies
  • 6615 views

Hello guys,

I have a query regarding punch in creo sheet metal. If you see the pic I attached there is a surface tear it shouldn't happen. I know it has got to do with the punch tool radius but I can't get it done my constraint is that the total thickness of the SM should be 5mm after punching the radius dimensions doesn't matter( The base wall is 3mm).

I don't know what I am missing here. any help is deeply appreciated.

Thank you

BabuSHEETMETAL-punch.png

3 replies

A
acharoenpon1-Visitor
1-Visitor
February 10, 2017

I usually do by simple solid modeling eg. Extrude . It's simpler, faster and cleaner than sheet metal module.

Sheet metal module give me a lot of error and need attention to look at every features. I have to confirm that it take a right solution after I pressed regernated button.

M
mstevens-23-Newcomer
3-Newcomer
February 10, 2017

I don't delve into sheet metal much so I am far from experienced with it, but occasionally we need something made that is  more complex than a simple box. I recently had a piece with a curved tab that would inexplicably shorten when the whole thing was flattened. By several inches. Maybe of some importance is the curved tab was a sketched feature? We could not resolve the "bug" and had to calculate material to add to the flat pattern.

D
dschenken1-Visitor
1-Visitor
February 10, 2017

I worked with a company that did large sized tents, like 20 foot diameter, and used sheet metal to get the fabric flat patterns; didn't notice any shortening. How big were the parts you had problems with?

성
성신_011-Visitor
1-Visitor
February 13, 2017

I had been to open the file

And I had been to define

I didn't know bacause

M
mstevens-23-Newcomer
3-Newcomer
February 15, 2017

I was able to correct my situation by changing one thing ATTAPON mentioned. I had previously created the curved geometry on my part using "flange". To fix it I simply used "extrude" instead and my flattened part appears correct now.

EDIT: Digging deeper, I suspect that my dev length dimension got changed to another value when I used "flange". When I changed it to the correct value, "flange" worked as well as "extrude". (So either way works correctly!)

To the original post, what about a solid model shelled out and then converted to sheet metal? Just an idea...

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