Plunger pump cylinder body machining method and system

The invention relates to the technical field of welding, in particular to a plunger pump cylinder body machining method and system. S10, based on the welding requirement of the plunger pump assembly, the plunger pump assembly is fixed to a base of the positioning assembly; s20, based on positioning and fixing of the plunger pump assembly, the peripheral wall of a welding sleeve of the welding assembly abuts against the inner wall of a first through hole of the plunger pump assembly; s30, on the basis that the peripheral wall of the welding sleeve abuts against the inner wall of the first through hole, one end of a conical rod is driven to move into the first through hole, and the peripheral wall of part of the conical rod abuts against the inner wall of a third through hole; s40, diffusion welding treatment is conducted on the welding assembly and the plunger pump assembly on the basis that the peripheral walls of part of the conical rods abut against the inner wall of the third through hole; and S50, diffusi