Punching-free production line for pipe expansion for heat-shrinkable pipe, and machining method thereof

The invention discloses a punching-free production line for pipe expansion for a heat-shrinkable pipe. The punching-free production line for pipe expansion for the heat-shrinkable pipe comprises a rawmaterial disc, a pipe expansion mechanism and a material receiving mechanism, wherein the heat-shrinkable pipe is wound on the raw material disc, the tail end of the heat-shrinkable pipe penetrates through the side part of the raw material disc and communicates with a rotatable air nozzle, and the air nozzle is connected with a vacuum pump; the pipe expansion mechanism comprises a heat-shrinkablepipe heating section, a heat-shrinkable pipe dry-expansion section, a heat-shrinkable pipe cooling shaping section and a heat-shrinkable pipe flatly-pressing exhaust section; and the material receiving mechanism comprises a winding disc and a tension control device, the winding disc rotates to realize winding of the flat heat-shrinkable pipe, the tension control device comprises an adjustment disc which is arranged in a s