The invention relates to
machining of
gas cylinder liners, in particular to a thin-wall
gas cylinder liner
machining auxiliary tool and a
machining method. The problems that a thin-wall
gas cylinder liner assembling auxiliary tool is large in size, heavy in
dead weight and difficult to operate are solved. A thin-wall gas cylinder inner container machining auxiliary tool comprises an elastic clamping sleeve, a plurality of machining grooves are formed in the two ends of the elastic clamping sleeve, and the machining grooves in each end are evenly distributed around the axial direction of the elastic clamping sleeve at equal intervals. The elastic clamping sleeve is used for clamping the two gas cylinder openings and the
pipe, so that
welding is convenient; the machining groove is used for reserving a
spot welding position, the gas cylinder opening and the
pipe can be preliminarily positioned conveniently after
spot welding, then the elastic clamping sleeve is removed, and final
welding can be conducted on the gas cylinder opening and the
pipe. The method for directly
welding and forming the inner container of the thin-wall gas cylinder is adopted, and the problem that integral forming cannot be achieved is solved. The elastic jacket is designed, so that the problem of accurate positioning of the welding seam position of the thin-wall part is solved; and meanwhile, the stability of a welded part after
spot welding is ensured by fully utilizing the symmetrical structure of the elastic clamping sleeve slotting.