The Key Technology in Extrusion Tapping of Internal Thread

Abstract:

Internal thread processing is an indispensable procedure in manufacture, its processing efficiency and quality become more and more important in modern manufacturing, especially in aerospace and automotive industry. Compared with the traditional process of cut tapping of internal thread, the process of extrusion tapping of internal thread possesses the following advantages: without chip, higher precision, better surface quality, better continuity of metallic, greater efficient, greater strength, longer tool life. This paper firstly introduces the current research status of extrusion tapping of internal thread, elaborates the principle and characteristic of extrusion tapping, analyzes the matal plastic flow law and thread forming characteristic during tapping, then generalizes the influencing law of the key technology on thread forming quality, such as extrusion tap type, lead hole diameter, tapping speed and friction. Furthermore, puts forward some improvement approach to reduce tapping torque and enhance forming quality of internal thread.

• Periodical: Advanced Materials Research (Volumes 295-297)
• Pages: 2636-2641
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.295-297.2636
• Online since: July 2011
• Authors: Yong Yi Li, Sheng Dun Zhao
• Keywords: Extrusion Tapping, Internal Thread, Key Technology

References

[1] Fromentin, G., Poulacon, G., and Moisan, A. 2002, "Metallurgical Aspects in Cold Forming Tapping," National Conference of Material Research, Leeds Metropolitan University, UK, September 2002.

[2] Dong Ma et al. Study on process for cold extrusion forming method of internal thread of lmuckle axis, The 6th International Conference on Frontiers of Design and Manufacturing. 2004.

[3] Pierre Stéphan, Florestan Mathurin, Jean Guillota, Analytical study of maximal tapping torque during forming screw process, Journal of Materials Processing Technology, 2011, 2(211): 212-221.

DOI: 10.1016/j.jmatprotec.2010.09.013

[4] Fromentin G, Poulachon G, Moisan A. Precision and surface integrity of internal threads obtained by form tapping. Manufacturing Technology, CIRP Annals 2005; 54(1): 519–522.

DOI: 10.1016/s0007-8506(07)60159-0

[5] Hayama, M., 1972, "Estimation of Torque in Cold Forming of Internal Thread," Bulletin of the Faculty of Engineering, Yokohama National University, 21: 77–90.

[6] Henderer, W. E., and von Turkovich, B. F., 1974, "Theory of the Cold Forming Tap," CIRP Ann. 23: 51–52.

[7] Henderer, W. E., and Von Turkovich, B. F., 1975, "Theory and Experiments in Tapping," Proceedings, North American Manufacturing Research Conference, 3: 589–602.

[8] Warrington C, DeVor R, Kapoor S. Experimental Investigation of Thread Formation in Form Tapping. ASME Journal of Manufacturing Science and Engineering 2005; 127(829): 829-836.

DOI: 10.1115/1.1951784

[9] Warrington C, DeVor R, Kapoor S. Finite element modelling for tap design improvement in form tapping. ASME Journal of Manufacturing Science and Engineering 2006; 128(65): 65-73.

DOI: 10.1115/1.2117427

[10] A. Bierla, G. Fromentin, J-M. Martin, T. Le Mogne, N. Genet. Tribological aspect of lubrication in form tapping of high-strength steel. Lubrication Science 2008; 20: 269-281.

DOI: 10.1002/ls.62

[11] Florestan Mathurin, Jean Guillot, Pierre Stéphan and Alain Daidié. 3D finite elements modeling of an assembly process with thread forming screw. Journal of Manufacturing Science and Engineering, Transactions of the ASME 131 (4) (2009): 151-158.

DOI: 10.1115/1.3160377

[12] Hong Miao, Dunwen Zuo, Hongjun Wang, Hongfeng Wang. Optimization of Tap Parameters for Internal Thread Cold Extrusion of High Strength Steel Based on Genetic Algorithm. Key Engineering Materials. 431-432(2010).

DOI: 10.4028/www.scientific.net/kem.431-432.434

[13] V. M. Menvschakov, G. P. Urlapov, Vs Wednesday. Vess Truzh Echnye Taps, Moscow Mechanical Engineering, 1976.

[14] Ivanov, V., Kirov, V., 1996, Rolling of internal threads: Part 1, Journal of Materials Processing Technology, 72: 214-220.

DOI: 10.1016/s0924-0136(97)00171-4

[15] Jiuhua Xu, Min Wang. Study on Internal Threads in high Strength Steels by Cold Form Tapping. JOURNAL OF MATERIALS ENGINEERING, 2000(4): 41-44. (In Chinese)

[16] Hong Miao, Dunwen Zuo, Hongjun Wang, Hongfeng Wang. Research on Metal Flow of Internal Thread of High Strength Steel during Cold Extrusion for Aircraft Landing Gear. China Mechanical Engineering 2010, 21(14): 1714-1718. (In Chinese)

[17] Zhengfeng Liu. CAD of extrusion tap. TOOL ENGINEERING, 1997, 31(11): 15-18. (In Chinese)

[18] G. Fromentin et al. An experimental study on the effects of lubricant in forming tapping. Tribology International 43(2010): 1726-1734.

[19] B. Zhang, F. Yang and J. Wang, Fundamental aspects in vibration-assisted tapping, J. Mater. Process. Technol. 132(12)(2003): 345-352.