Machining method of gas turbine flame cylinder front ring

The invention discloses a machining method of a gas turbine flame cylinder front ring. The machining method of the front ring comprises the following steps: manufacturing a conical ring with a structure similar to that of a head ring by using a lathe; placing the conical ring on a punching die; sleeving a head ring-shaped body on the periphery of a punch; cutting the small end of the head ring-shaped body through the lathe; fixing the head ring-shaped body on a cutting device; cutting the large end of the head ring-shaped body through a cutting machine; removing a wrinkled part of the large end, and then rolling and forming by using a metal plate to obtain a conical cylinder ring; sleeving the head ring and the conical cylinder ring on the outer side of a connecting device, enabling the head ring and the conical cylinder ring to be coaxially arranged with the connecting device, and then welding the tail end of the head ring and the head end of the conical cylinder ring to obtain a front ring. According to the