Sheet metal cylinder 5

[belennn]

hello

I need help regarding a sheet design.
We have Pro wilfire 5.0 and I need to create a cylinder with a Proe sheet metal option, because then I need its flat pattern in a 2d drawing.
The cylinder has to have a flat wall which mounts over itself to weld all the joint along. (see picture attached)

I have tried several ways and I can’t do it:
• First I create revolve wall but then program doesn’t allow to create a overlapped wall
• Then I create a sheet circle but is the same than before, program doesn’t allow to create a overlapped wall
• I have also tried to create it as a part and them convert it to a sheet metal, but then I can’t create a flat pattern.

I will appreciate any help.

Regards

 

[closer9]

Okay, I hope I can explain this.

Start out in a new sheetmetal part. Use the extrude command as though creating a solid part. Draw 2 circles (I'm assuming the part you creating is a tube with a seam), the larger with a diameter of 1 + 2x material thickness. So, if your final ID is to be 3", and your material thickness is 0.0625" the smaller circle will be 3" and the larger will be 3.125". Then at the top draw two vertical lines between the circles. Their horizontal seperation anything larger than material thickness (0.07") if you thicken to the inside, anything greater than one if you thicken to the outside. Use those lines to break the smaller circle. Then delete the line on the left, and draw another vertical line from the out circle up (length doesn't matter). This new lines horizontal distance from the remaining vertical line should be whatever you want your overlap to be. Now break the outer circle between these two verticals, delete the second vertical, and extrude. You will be given the option of which side of your lines to thicken the material, and how long to make the part.

So, effectively, you've just drawn the outline of one surface of your sheetmetal part, and given it a thickness. You can now make a flat pattern of this.

There may be an easier way, but this works for me.

 

[closer9]

EDIT:
Now break the outer circle between these two verticals, delete the second vertical, and extrude.

Should be:
Now break the outer circle OUTSIDE these two verticals, delete the second vertical, and extrude.

 

[PeterStock]

See the attached PDF for how I did what you want. Note I am on WF3 your menu pics may vary.

Peter Stockhausen
Senior Design Analyst (Checker)
Infotech Aerospace Services
www.infotechpr.net

 

[mjcole]

Peter,

Wouldn't the Radii be automatically added if just a straight line connected the two arcs? The described method gives more control over radii from sketch with dimensions but the virtual sharps would ensure correct radius values without using relations.

Michael

 

[belennn]

Thanks a lot to all of you!

I don't know how much time I have spent on it this week!!

 

[belennn]

Another question regarding this subjet.

If I would sketch the same cylinder, but the two sides overlaped? (see drawing attached, because is very difficult to explain).
I have tried doing something similar that you explain me before, but it doesn't work (The red lines as you can see in the drawing attached are overlaped)

Thanks a lot!

 

[PeterStock]

Michael, I do not know what would happen with sharp corners, I suspect that you could not create a flat pattern. I will try it out when I have time.

Belennn, what I drew was the line for a driveing surface. I think that your 2nd situation would require a second feature so the place where the driving surfaces are in contact would be done with two different features, I will also try that out when I have time.

Peter Stockhausen
Senior Design Analyst (Checker)
Infotech Aerospace Services

http://www.infotechpr.net

 

[belennn]

I have done a second feature and I have obtained what I wanted

Thanks a lot!

 

[PeterStock]

Glad to here that belennn. I have done a presentation with how to do the overlapped joint as well how it looks like with sharp corners (it does unfoled, but I do not like the look of the part).

Peter Stockhausen
Senior Design Analyst (Checker)
Infotech Aerospace Services
www.infotechpr.net