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BartL7-Bedrock
7-Bedrock
December 14, 2022
Question

SMT extruded cut normal to surface

  • December 14, 2022
  • 3 replies
  • 5534 views

Hi All,

 

I'm using Creo 8.0.

Hopefully somebody here can help me out since I haven't been able to find a solution on the internet yet.

Quite often I have to design tubes which will be cut from sheetmetal and then rolled into their round shape. Therfor all cuts need to be normal to the sheetmetal plate. So far so good. However when I need to make a simple angular cut at the end of the tube things get frustrating pretty soon.

When you look at attached cross section you will see the upper end is exceeding the cutting line. Here I've used normal to driving surface. When I use normal to offset surface the upper end is fine but the lower end is exceeding. I do understand what it is doing so this still makes sense to me. Therefor I would expect "normal to both surfaces" should do the trick but this feature doesn't work at all. 

This is frustrating cause a simple cut like this can't be done in one feature but always requires more features.

 

Am I missing something here or is it just a bug?

3 replies

tbraxton
22-Sapphire II
tbraxton22-Sapphire II
22-Sapphire II
December 14, 2022

One way to do this is to unbend the cylinder and create the cut on the flat part. Are these cuts made to the flat pattern blank before rolling the tubes when fabricated?

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BartL7-BedrockAuthor
7-Bedrock
December 14, 2022

I know, but the formed part creation is the goal. So working from a flat blank is not preffered. Besides this, usually these cuts result in very complex flat state contours.

M
MartinHanak24-Ruby III
24-Ruby III
December 14, 2022

Hi,

edit definition of the cut and click MartinHanak_0-1671020833056.png button. When clicking the button you are switching between sheetmetal cut and solid cut.

 

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BartL7-BedrockAuthor
7-Bedrock
December 14, 2022

This is the feature I was talking about. So yes I'm using this feature but it's not working properly.

M
MartinHanak24-Ruby III
24-Ruby III
December 14, 2022
@BartL wrote:

This is the feature I was talking about. So yes I'm using this feature but it's not working properly.

Hi,

in Creo 8.0.4.0 it is working properly. See attached file.

kdirth
21-Topaz I
kdirth21-Topaz I
21-Topaz I
December 16, 2022

After a bit of testing in 7.0, I have may have found the problem.  If I make a cylinder and convert it to sheetmetal then make the cut, drawing from silhouette to silhouette, the cut fails.  If I create a sketched rip to break the solid cylinder first, the cut works just fine.  Creo seems to have trouble making the both sides cut when the model is not developable (no rip in the cylinder).

There is always more to learn.
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