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How to twist a sheetmetal part?

Legend
Legend

Okay, I'm running into dead ends trying to make a sheet metal part that follows a curve, and twists just a few degrees. I've tried switching to part (where it is now), and no luck there either. I've started with my curve I want to follow, tried using sketches, thought that would be the key to make it work.

 

Suggestions? I'm using ST9 MP8 at the moment.

15 REPLIES

Re: How to twist a sheetmetal part?

Gears Esteemed Contributor Gears Esteemed Contributor
Gears Esteemed Contributor

Hi there @Trikefreak,

 

This will not be a "typical" sheetmetal model, as it has double curvature......so I would suggest modelling it as a surface, then thicken it. Although, you will need to use blank body to get a flat pattern from it, due to the form.

 

TWISTED - Copy.png

Sean Cresswell
Design Manager Streetscape Ltd
Solid Edge 2019 [MP3] Classic [x3 Seats - Cloud Enabled]
Windows 10 - Quadro P2000

Re: How to twist a sheetmetal part?

Legend
Legend
Ahh, that's how I do my boat sides, I will see if I can do it that way. I switch to Part, make surface, switch back to Sheet metal, and allows me to model as parts are sort of "hand formed".

Thanks!

Re: How to twist a sheetmetal part?

Legend
Legend

Grrr, this doesn't work like my other parts that each end is parallel, and along a curve. I'm missing how I get this to work. Suggestions?

Re: How to twist a sheetmetal part?

Gears Esteemed Contributor Gears Esteemed Contributor
Gears Esteemed Contributor

@Trikefreak,

 

My quick & dirty version of it.........sketches > bounded surface > thicken > flatten.

 

ST10_PSM_TwistedSheetMetal-A.png

 

ST10_PSM_TwistedSheetMetal-B.png

 

ST10_PSM_TwistedSheetMetal-C.png

 

ST10_PSM_TwistedSheetMetal-D.png

 

ST10_PSM_TwistedSheetMetal-E.png

 

ST10_PSM_TwistedSheetMetal-F.png

 

ST10_PSM_TwistedSheetMetal-G.png

 

 

Sean Cresswell
Design Manager Streetscape Ltd
Solid Edge 2019 [MP3] Classic [x3 Seats - Cloud Enabled]
Windows 10 - Quadro P2000

Re: How to twist a sheetmetal part?

Phenom
Phenom

@Trikefreak Use the lofted flange between two curves - will allow you to do twisted sheet metal directly. The other option is to make a bluesurf and thicken.

Re: How to twist a sheetmetal part?

Legend
Legend

I played with it a bit this morning. I was able to get something, be it right or wrong.

 

I started with the center arc that I wanted, and then a line at each end centered on that arc, at different angles. I then did 3D sketch of an arc to each end of the lines, and made it equal radius to the original arc. It might be close enough for what I need, seeing how I have to then cut it to a curved width that fits in the bow of the boat. I'll mess around with it some more this evening.

 

I didn't think lofted would work, if both ends weren't parallel to each other? I need a "part" that is rolled in an arc, and twists from one end to the other.

Re: How to twist a sheetmetal part?

Phenom
Phenom

@Trikefreak Not sure exactly what you're doing, but there's no reason you can't lofted flange between two non-parallel lines or line segments

 

twist.PNG

Re: How to twist a sheetmetal part?

Legend
Legend
WOW, I'm def doing something wrong! Thanks for the visual, I'll have to try a different approach....

So, I can create a loft along a curve as well, with each end not parallel to each other?

Re: How to twist a sheetmetal part?

Phenom
Phenom

yea we quite often loft between a semicircle and 3 sides of a rectangle to create a "square to round" as we call it. 

 

You have the option to leave it as a twist in the sheet metal, or in the lofted flange properties you can specify that the twist is e.g. 5 step folds and it will give you the fold lines to step fold on press brake.

 

Just a word of warning, the lofted flange feature can be tempermental if your using a relativly thick plate for a given twist, or twisting a lot over a short distance!