If they are the same size then find a rod that fits inside them or a pipe that fits the outside and use two bolts in each tube thru the pipe.
How to connect sheet metal together.
You could use a square tube or a piece of angle iron if need be.
However the folding or tab joint operation does not guarantee full positioning and additional auxiliary positioning is required.
Rivets are used when it is required to connect permanently two or more pieces of heavy section metal.
Different brands of epoxy mature at varying rates but most require 24 hours curing time.
It is used to join different material and sheet thickness parts.
In engineering rivets are usually made of wrought iron or mild steel.
Clinching joint is a type of permanent sheet metal joining operation that involves joining sheet metal parts using cold forming operation.
Can i make finer box joints or jigs or some sort of joinery method.
The two pieces of sheet metal connected to each other by folding or bending tabs in the form of a buckle and a clamping slot.
How would i attach 2 pieces of metal together without using anything but the pieces themselves and be able to take the pieces apart as well.
Press the metal pieces together firmly and use adjustable clamps to hold them in place.
Over lap the pieces a couple of inches if they slide together and bolt them together.
The metals most commonly joined using tabs are soft steel aluminum copper and brass.
For the best results parts should be designed to bend perpendicularly to the direction of sheet rolling or.
It is required specially in heavy sections such as bridge wagon tanker boiler etc.
The least expensive way of doing this is often to use a thread forming screw in a prepunched hole in both pieces of the sheet metal being assembled the goal when assembling sheet metal is to form an internal thread tighten the screw without applying too much torque and avoid stripping the thread.
The technique of joining metal pieces is as simple as applying the glue to the surface of the metal where it needs to be joined from pressing the metals together and letting it dry in most cases the pieces to be glued have to be under pressure after clue is applied until it is dry.
This assembly method is relatively simple and convenient and can complete rapid assembly.