Composite pipe internal expanding method forming die

The utility model provides a composite pipe internal expanding method forming die, belongs to aeronautical composite material shaping field. The taper joint boss of metal mandrel no. 1 mate insert thebell mouth of metal mandrel no. 2 in, metal mandrel no. 1 and metal mandrel bi -pass are crossed the embedding and are kept off groove no. 1 and keep off the fender key fixed connection in the grooveno. 2, a metal mandrel other end is equipped with inflates the hole, is equipped with the several air vent on the lateral wall of metal mandrel no. 1 and metal mandrel no. 2, the interior from interior to exterior of the die cavity of die body and last die body is equipped with metal mandrel and silica gel air bag in proper order down, and the silica gel air bag lateral surface wraps up the combined material layer that is used for making composite pipe, and tighten with the clamp respectively at silica gel air bag's both ends, and the metal mandrel other end can be dismantled and be connectedwith the end cover, down t