The Perfect 90 and Roll Forming
The Perfect 90 and Roll Forming
(OP)
All,
We are looking to mount two items on each of the legs of a Steel "L" Angle. We need the two surfaces to be as close to 90 deg. as possible. The problem with angle is you can't always count on this. We are thinking of going to roll forming. We can live with the radius on the roll forming, but we are unsure how tight a tolerance on the angle we can get. Anyone have any thoughts?
Regards,
Rich....
We are looking to mount two items on each of the legs of a Steel "L" Angle. We need the two surfaces to be as close to 90 deg. as possible. The problem with angle is you can't always count on this. We are thinking of going to roll forming. We can live with the radius on the roll forming, but we are unsure how tight a tolerance on the angle we can get. Anyone have any thoughts?
Regards,
Rich....
Richard Nornhold, PE





RE: The Perfect 90 and Roll Forming
Should be easy enough to get 90 degrees on a stock angle by grinding or milling, depending on your surface finish needs.
Could you use aluminum angle? It generally seems to be "truer" than steel.
Is shimming an option?
Doubtful that you would be able to get roll forming to be any better or more consistent than stock angle. Hefty tooling and set-up charges too.
RE: The Perfect 90 and Roll Forming
RE: The Perfect 90 and Roll Forming
We thought about milling and grinding, but want to keep this as cost effective as possible. We thought if we can get spot on with roll forming, then we avoid machining time.
Regards,
Rich....
Richard Nornhold, PE
RE: The Perfect 90 and Roll Forming
It will take some setup to roll at 90 and keep the straightness under control. I would imagine that you would have to under or over roll and on the second pass correct the angle.
We purchased some precision aluminum equal leg angle at one time. The material was used for optical benches.
A little food for though if you are using CS in the lighter gages you might give these people a call.
http://jssteel.com/index.asp
RE: The Perfect 90 and Roll Forming
Cheers
Greg Locock
Please see FAQ731-376 for tips on how to make the best use of Eng-Tips.
RE: The Perfect 90 and Roll Forming
RE: The Perfect 90 and Roll Forming
Bladey.
RE: The Perfect 90 and Roll Forming
Good luck
RE: The Perfect 90 and Roll Forming
you can control it. Do you have the options
of multiple stages where you can tweak the
process after several test runs?
RE: The Perfect 90 and Roll Forming
If you just have a few pieces call around to your local Job Shops. Lots of time they are listed under welding or boiler repair.
You may be surprised.