The present invention relates to one kind of variable wall thickness metal barrel and its making process. The variable wall thickness metal barrel is suitable for use in aviation, aerospace, weapon, chemical, petroleum and other fields. The variable wall thickness metal barrel has thick wall bottom part, middle transition part and thin wall upper part connected successively to form one integral. It is made with equal wall thickness tube and through rotary extrusion. The product of the present invention has novel structure, high surface quality, high size accuracy and reasonable making process. |