Internal thread tapping tool

• Main Authors: WANG CUNMING, ZHANG YIZE, JIA CHAO, CUI ZHENG, ZHOU SUQIANG, LIU KAI, LI JINSHOU
• Format: Patent
• Language: Chinese; English
• Published: 11.10.2019
• Subjects: MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR; PERFORMING OPERATIONS; THREAD CUTTING; TRANSPORTING; WORKING OF SCREWS, BOLT HEADS, OR NUTS, IN CONJUNCTIONTHEREWITH

The invention discloses an internal thread tapping tool. The tool comprises a core rod, an adjusting nut, a plurality of threaded blades, a pressure ring, a spiral spring and a pressing cover, whereinone end of the core rod is provided with a rotating handle, the other end of the core rod is fixedly provided with the pressing cover, the multiple threaded blades are uniformly distributed around the core rod, each threaded blade is in sliding connection with an axial wedge-shaped dovetail key on the core rod through a dovetail groove in the threaded blade, the adjusting nut is located between the rotating handle and the threaded blades and is matched with the core rod through threads, the pressing ring and the spiral spring are arranged on the core rod in a sleeving mode, one end of the spiral spring abuts against the pressing cover, and the other end of the spiral spring abuts against the threaded blades through the pressing ring. According to the tool, the size of processed threads ischanged by adjusting the