Auxiliary tool for V-shaped opening machining

The utility model discloses a V-shaped opening machining auxiliary tool, and relates to the technical field of aircraft part manufacturing. The V-shaped opening machining auxiliary tool comprises a positioning block, a limiting assembly, a first positioning pin, a second positioning pin and a third positioning pin. A test piece to be machined is detachably connected with the positioning block. The limiting assembly is detachably connected with the positioning block, and the limiting assembly is characterized in that the side wall of a first positioning pin can abut against the end face of the long edge of the test piece to be machined; the side wall of the second positioning pin can be propped against the end surface of the long side of the test piece to be processed; the side wall of the third positioning pin can abut against the end face of the wide edge of the to-be-machined test piece. The V-shaped opening machining auxiliary tool is matched with an existing grinding wheel, so that the V-shaped opening ca