The utility model discloses an annular double-boss
drill jig, and particularly relates to a drilling die for bosses at the
tail end of a pull ring, the
drill jig is used for positioning the pull ring and comprises an outer plate, a middle plate, an inner plate and fastening screws, openings of the pull ring extend outwards to form connectors, connecting holes are formed in the connectors, and the outer plate and the middle plate are connected through the fastening screws. Fastening screws penetrate through the outer positioning holes, the middle positioning holes and the inner positioning holes respectively to fix the pull rings, the
drill jig outer plate, the drill jig middle plate and the drill jig inner plate into a whole, and due to the fact that the outer guide holes, the middle guide holes and the inner guide holes are coaxially arranged and are consistent with the connecting holes in position,
machining of the connecting holes can be completed by drilling a
drill bit into the guide holes through a common bench drilling
machine. According to the drill jig, double holes can be machined at the same time after one-time clamping, dismounting work is not needed in the
machining process, the coaxiality of the double holes is effectively guaranteed, and the requirements of the double holes, the annular center size and other related sizes are effectively met. Compared with an existing
vise and clamping arm fixing mode, the clamp has the advantages of being easy to clamp, high in
mechanical strength, not prone to product deformation and the like.