Drill jig used for drilling holes in drum

The utility model discloses a drill jig used for drilling holes in a drum, relates to the technical field of drill jigs for castings, and is used for solving the problem that the drilling accuracy cannot reach a standard in the process of drilling holes in a flange plate in the drum by the existing scribing method and improving the drilling efficiency and the universality of the drill jig. According to the drill jig, a fixing ring is additionally arranged on a substrate according to the inner diameter of the flange plate, so that the fixing ring is fixed in the flange plate; the substrate is provided with a drilling plate, and the drilling plate is provided with a plurality of round holes; in the drilling process, a drill bit is aligned with the round holes to drill holes in the flange plate, and the drilling accuracy is high and the efficiency is high; meanwhile, the substrate can be provided with drilling plates in different sizes according to different sizes of flange plates to meet the drilling requirement, and drill rigs in different sizes are not required to be manufactured separately. The drill rig can adapt to the flanges plates in different sizes and is high in universality, and the drill rigs in various sizes are not required to be manufactured. As the drum is not produced massively, the problem of high cost due to drilling by a machining center is avoided.