The invention discloses a process for controlling the mounting precision of multiple barrels on a
conical surface. The process comprises the following steps: S1, setting out the
trepanning and
lofting size of an inclined surface of a cone, setting out a stable tool style, and setting out a precision detection node in a
barrel section mounting process; s2,
lofting on the inclined plane of the cone according to the connecting
pipe; s3, a positioning hole is formed in the positioning center line of the transverse cone connecting
pipe on the same side; s4, after tapping of the connecting pipes on the two sides is completed, a
laser theodolite is used for scanning the tapping edges; s5, circumferential mounting angle quartering lines of the connecting pipes are marked on the connecting pipes with the coaxiality requirement in advance; s6, after the tapping inspection is qualified, the connecting pipes with the coaxiality requirement are assembled in pairs; s7, the connecting pipes need to be symmetrically welded in pairs at the same time; in production, a stable tool is used, data are detected according to a plurality of nodes, after precision deviation is found, a
welding deformation control method is adopted for adjustment, the final forming precision is ensured, the installation precision of the connecting
pipe on the
conical shell ring is improved, and the construction cost is also reduced.