Create a Flat pattern
Ok, that body belongs to a Base Feature - (Timeline removed if there ever was one - not in either video)
Yes it was converted to Sheetmetal, but any work being done to the piece, has to be done by editing the Base Feature that owns it.
Convention would be to build with a timeline, for parametric functions. Sketches (none) can be edited, and bodies modified. The Press Pull operations in the first video have not been done in this model.
The red lines are to show if the inside or outside is the cut you want to cut. All the material above the external outline needs removing - for expected fit. My understanding is that these bevel / coping cuts, stop the flat pattern, but that latest video didn't seem to care.
As you get going, each of your pipes must be a Component to get each Flat Pattern, to operate as expected.
If you have a version of the file with it's timeline, then use that and abandon this one.
Might help...
I could not get anything reliable from your file as downloaded.
I went back and made my split cut as I would normally do it, the Flat pattern goes red, but the inside and outside sketches are working ok, (Sketch on front and back face.) You decide which one will work for you.
Might help...
Use the inside sketch. Removes the bevel edges.
Thats why the Press Pull, is done, and a square cut edge to the surface is the normal process.
Might help...
@davebYYPCU wrote:
To be absolutely technically correct, the inside and outside faces are both wrong, the flat pattern is correct width for the k factor position, usually at 0.44 of the thickness. One inch tube, is a 3 inch plus template width.
To create a paper template the K-factor should be "1".
f you measure the length edge length of the coped tube, when flattened, both, the inside edge and the outside edge should have the same length.
Setting the K-factor to 1 will make sure the outer edge will remain true and the inner edge is stretched. Or, in other words the neutral fiber - the place of zero stretch - coincides with the outer tube surface.
@davebYYPCU wrote:
I could not get anything reliable from your file as downloaded.
I went back and made my split cut as I would normally do it, the Flat pattern goes red, but the inside and outside sketches are working ok, (Sketch on front and back face.) You decide which one will work for you.
Might help...
I don't know if this problem with the flat pattern and the example above this one has been answered in any of the later posts but the problem is the split in the pipe is parallel not perpendicular to the tube.
If you construct a triangle and extrude cut through the tube it will flat pattern. I used 1mm to make it easy to see but can be reduced. This works for the example in this post and the one above. Note, if you modify an existing design you need to delete any existing flat patterns and create new ones.
Both versions attached.
Mark Hughes
Owner, Hughes Tooling
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Didn't watch the video before so thought I'd play around with you example a bit more. I found I can get it to work but it's not very reliable. It seems to depend on which edge you use to create the ruled surface. With some tests using each edge I eventually found one that worked!
What I see now is the surface you created was not planar, if you right click on it you can not create a plane or sketch.
With the edge I found that works it is a planar surface and unfolds but does have the red error in the flat pattern. Like in the video as well.
File attached.
Mark Hughes
Owner, Hughes Tooling
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