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A
awilcox701-Visitor
1-Visitor
March 26, 2018
Question

Challenge Modeling Complex Curved Sheet Metal Flange

  • March 26, 2018
  • 2 replies
  • 4866 views

 Hello community,

I'm trying to model a sheet metal part with a flange around its perimeter.  I already have radial profile geometry including the flange. I created a  Flange around a continuous perimeter, but it will not unbend correctly. Does anybody have a suggested approach?

profile1.PNGprofile3.PNG

2 replies

S
23-Emerald III
StephenW23-Emerald III
23-Emerald III
March 26, 2018

Creo sheet metal will only work on non-intersecting bends. You have to think of bend only with a press brake. Straight bends that don't intersect at all. 
The deformation (stretching or bunching) in rolling an item like that is not straight forward. 

 

A
awilcox701-VisitorAuthor
1-Visitor
March 26, 2018

I am getting closer to a solution. I was able to create the bend the u-shaped profile but the part didn't match the original shape. 

profile2.PNG

 

The interior surface of the finished part should line up with the green profile. Any suggestions to fix the problem?

 

Adrian

D
dschenken1-Visitor
1-Visitor
March 27, 2018

How did you construct the original shape and how did you do it differently than the solid?

T
TomD.inPDX17-Peridot
17-Peridot
March 27, 2018

This should be simple.  Creo 2.0 attached

unbend.PNG

BTW: The drawing and dimensions are not the same in the hand-drawn drawing.

There is also an over-constrained condition that cannot exit.

A
awilcox701-VisitorAuthor
1-Visitor
March 27, 2018

Tomd,

 

Thanks for your feedback. Unfortunately, some legacy drawings can't be modeled as published. I show over constrained dimensions (reference) only to validate hand drawing.

 

Your curve profile is not the same (fewer arcs and different dimension scheme for arc centers) which  could factor into the simple solution.

 

Not sure what I am missing.

T
TomD.inPDX17-Peridot
17-Peridot
March 27, 2018

Maybe I understated the level of effort required.

 

The drawing is wrong, no doubt!  Someone is trying to make a drawing based on a defined flat blank.

 

Suspect dimensions are the 72-1/8 and the 1-7/8.

 

I did get everything to match if I let the 1-7/8 float but I doubt this is the shape that was expected.

 

As to the "means" of getting there, this time I use an extrude.  Sweep would have worked similarly.

 

I did have a to make a few assumptions since the drawing is not published complete: IBR=T and T=1/8"

 

What I did was to use the non-tangent specified dimensions and overlaid it with a spline.  This manages both the requirements and the transition tangents.

 

clamp.PNG

 

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