Butt-joint location device for mechanical part welding

The invention relates to the technical field of location devices, and particularly relates to a butt-joint location device for mechanical part welding. The butt-joint location device for mechanical part welding comprises a first hoop and a second hoop, wherein the first hoop and the second hoop are both connected to the surface of a pipe fitting to be welded in a sleeving manner through fastening bolts; a U-shaped fastener is fixedly connected to the outer wall of the first hoop; a rotary shaft is fixedly connected to the U-shaped fastener; a thread rod is rotationally arranged on the rotary shaft; a clamping block is vertically arranged on the outer wall of the second hoop; a U-shaped groove is formed in the clamping block; one end away from the U-shaped fastener, of the thread rod, is inserted in the U-shaped groove; the outer wall of the thread rod is in thread connection with a fastening nut; and the thread rod is in fastening connection with the clamping block through the fastening nut. The butt-joint location device for mechanical part welding is quite convenient to use during butt-joint location for the pipe fitting, and has the advantages of being accurate and rapid in location; and meanwhile, disassembly-assembly processes are simple and convenient to operate, and free from influence on the normal welding of workers.