Manufacturing Technology 2017, 17(4):519-526 | DOI: 10.21062/ujep/x.2017/a/1213-2489/MT/17/4/519

Numerical Simulation and Experimental Research on Cold Form Tapping Process of Internal Thread

Hong Miao1, Qing Mei1, Jingyun Yuan1, Shanwen Zhang1, Yifu Jin1, Dunwen Zuo2
1 College of Mechanical Engineering, Yangzhou University, Yangzhou 225000, China
2 Mechanical Engineering Institute, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China

During the cold form tapping process of internal thread in high-strength-steel, the effect of bottom-diameter, extrusion speed, friction factor and extrusion times on extrusion temperature and torque have contributed to tap wear, break and manufacturing quality. The process of cold form tapping of internal thread for Q460 high-strength-steel is studied through numerical simulation and experimental research. The effect of different processing parameters, including the bottom-diameter, extrusion speed, friction factor and extrusion times, on temperature and torque during the process of cold form tapping of internal thread are analyzed to provide new basis for further choosing optimized processing parameters. The simulation and test results show that obvious stress-strain and higher temperature zone focuses on working area during the cold form tapping of internal thread for Q460 high strength steel. The simulation value is slightly lower than the measured value and the error is no more than 20%. With the increase of bottom-diameter and extrusion times and the reduction of extrusion speed and friction factor, the extrusion temperature and torque will decrease.

Keywords: Internal thread; Cold extrusion; Numerical simulation; Torque and temperature

Published: September 1, 2017  Show citation

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Miao H, Mei Q, Yuan J, Zhang S, Jin Y, Zuo D. Numerical Simulation and Experimental Research on Cold Form Tapping Process of Internal Thread. Manufacturing Technology. 2017;17(4):519-526. doi: 10.21062/ujep/x.2017/a/1213-2489/MT/17/4/519.
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