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| Twist to Lock Tenon |
For the Workshop 2 furniture design classes I taught I had the students design and make furniture that could quickly assemble and also knock down (come apart) easily. Most woodworking joinery is not designed to come apart repeatedly. This CNC cut twist tenon connection does slip together easily and once twisted 90 degrees locks the parts together securely. Twist the other way to allow pulling the parts apart.
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| Twist 90 degrees to align with the center slot |
This example is a snug fit with only a few thousandths clearance between tenon and the slot it slips through. When twisted the fit is still snug, but could be improved by adding a slight ramp to the twist surface on the end panels. That would have the twist action wedge tighter as it turned. The fluting toolpath in Vectric's Aspire or V-Carve software could handle the ramping.  |
| Once apart all pieces store flat. |
Using this joint a simple table could be made from 4 panels. The center panel would have tenons on two sides and the top. Rotate the sides onto the side tenons, then rotate the top onto the top tenon. With the top in place it would prevent the sides from rotating. A double thick top could have the top tenon recessed flush when assembled. A couple of spring loaded pins could lock the top to the sides as it rotated into position.
Comments and question are encourage!
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