The invention relates to the technical field of part
cutting, and provides a positioning tool and a disk saw positioning method.The positioning tool is composed of a fixing tool used for clamping a
pipe fitting and a reference column capable of being switched between two positions, the first position of the reference column is a working reference position, and the end face of the reference column is flush with the
cutting face of a part to be
cut; and the second position is an avoiding position and is retracted or staggered so as not to interfere with
cutting. The tool can be quickly matched with an original tool through the additionally-connected bottom plate, the modularized heightening block, the additionally-connected block and the positioning guide block, high-precision base formation is achieved, the reference column slides in the guide hole, and reliable two-position positioning is achieved through a pin, a clamping groove and other mechanisms. According to the positioning method, the axial end face of the saw blade serves as an
external reference, and the process of placing, lowering the tool till the
axial projection of the reference column is overlapped with 40%-60% of the saw blade, extending the reference column to a first position, enabling the overall tool to be attached to the saw blade and then retreating to a preset gap, and enabling the reference column to return to a second position to complete in-place is carried out.