The utility model discloses a thread lap
machining centering tool which comprises a
machine tool body, a three-jaw chuck is arranged at one end of the
machine tool body, an inner hole is formed in the
machine tool body, the three-jaw chuck comprises three sets of clamping jaws, and a Haff positioning
assembly and a Morse cone
assembly are arranged in the inner hole. The Haff positioning
assembly comprises a Haff positioning sleeve and a Haff locking sleeve. The
Morse taper assembly comprises a first
Morse taper sleeve and a second
Morse taper sleeve. According to the technical key points, one end, in an inner hole of a
machine tool, of a lug material is limited and fixed through the Morse cone assembly, vibration of the
tail end of the lug material caused by vibration generated when a turning tool cuts round steel is prevented, the phenomenon that the lug material swings in the
machining process is effectively avoided, and the Haff locking sleeve and the Haff positioning sleeve jointly form a double-fixing structure; the lug material is limited and fixed through the Haff positioning sleeve, the lug material is elastically locked and fixed through the Haff locking sleeve, and vibration of the
tail end of the lug material is further prevented through the double-fixing mode.