Rolled cylindrical SM part with bent flange 1

[oharag11]

Hi I posted something in SW forum since that is what we use - though I have a general question regarding a cylindrical rolled part (large diameter) with a pre-bent angled flange along the length of the part. I attached a JPEG showing what I mean. I have to presume that rolling this part will cause large stresses along bend causing the flange to warp some. Is there a Sheet Metal expert on this site? Any other avenues I can pursue?

Thanks

 

[dvd]

Rolling a cone is truly a non-event.

cone rolling

It is also possible to bump form in a press brake, but for a one-piece cone the slip roll forming would be best.

 

[3DDave]

This shows the amount of distortion required for each of three methods - note that the distortion for the third method is zero.

Forming/spinning starts with a cone - the notches are where the material will have to shrink to meet the contour.

I think I have done these right, yeah constructive geometry.

 

[malzeri83]

@dvd - bumping is possible only if accepted. It is not real radius without special tooling
@oharag11 - plate rolls, stamping of conical, then welding together
Based on your quantities and costs I believe you are looking for economic solution))) Spinning lathe I believe more than 1/2 of million GBP so even the rent of it will be quite expensive to consider the availability of spinning process. Or it should be turning machine even for big and custom made)))