You would need to buy the metal parts.
Tools needed for bicycle frame building.
This category includes tools needed to manufacture a bicycle frame such as heatsinks hole saw arbors purge plugs taps and tube blocks.
With this tool i was able to build bike frames ass backward starting with this rear sub assembly and then adding the front triangle and finishing with seat stays and bridges.
Build a bicycle frame.
Shop tools for bicycle frame building.
Tube bender brazing clamps and more.
There are lots of different opinions techniques.
The first step in building a frame is to design the frame you intend to build.
Weld braze the front triangle.
Miter and attach the chain stays.
Shape a polystyrene core then layer carbon or glass fibre over it adding metal inserts as required for dropouts bottom bracket etc.
Instead you ll need a whole different list.
How to tap a t47 bottom bracket shell.