An idea for a corner gluing clamp brace. Using two, you can hold three pieces of material into a corner with clamps. The edges are chamfered on the outside and there is a groove on the inside to keep the braces away from the joint (and glue). There are holes in the sides for spool clamps (such as thingiverse.com/thing:10448).
The OpenSCAD file is parametric, but not all combinations make sense. But you should be able to make it larger or smaller as needed, at least. My intention was to use PLA for it's hardness, and I printed at a moderate infill ratio (35%). It seems quite strong and should be able to withstand any warping.
It's version 2 because I went through a couple design iterations, including designing separate inside and outside braces, but I realized they could be combined into one part.
The spool clamp holes are probably not useful for more than one clamp at this size, as the clamps will get in the way of each other on the inside. Staggering the holes or moving the closer to the corners should help improve this issue. Corner Clamp Brace
is licensed under the Creative Commons - Attribution
5 w x
5 d x
1.969 w x
1.969 d x