I recently purchased 10 second hand wooden frames from a screen printing company (not to sure if it was a mistake)

Yup. Many of us have made the same mistake if it makes you feel any better

I have considered reinforcing the wooden frames with some metal braces in the corners to stop the twisting and am curious if anyone has attempted such a feat??

I've used screens that were braced like that. It helped, but they still get warped. I doubt it would be worth the expense or the effort to be honest.

 

thanks Lewis, I have 2 aluminum frames and they are perfect so i think i have learnt my lesson!

 

Ahh, the curse of the old wooden frame.

The price of aluminum frames are fairly cheap these days. Shop around and you'll find a good deal.

The other options is finding some cheap roller frames that you can restretch your self. If you are interested we might have a few small 20x24 or 18x20 of these we would sell for $10.00 each.

Let me know if you have interest.

 

Instead of just using the braces in the corners it might be better if you screwed a bar of metal from corner to corner,this would reduce the warp.

 

If you want to salvage the frames the only surefire way to do this would be to cut the frames where they attach at the corners, then reclamp and reglue them together on a level surface. A bit of work but not too bad if you have access to a miter saw and a weekend.

Or - if the slope of the frame is somewhat linear you can shim the side the clamps come down on to adjust for the warp. This will not be effective if the warp is from side to side.

EDIT: Or what ino said above - that might pull the frame straight and save a lot of time. I missed that.