Conceptional cutting tool design for internal thread turning
DOI:
https://doi.org/10.32972/dms.2020.012Keywords:
turning, tool, ball nutAbstract
This article describes the different machining methods of the ball nut thread. One of the disadvantages of machining high pitch ball nuts by grinding process is to produce a modified tool profile to avoid collisions between the tool holder and the workpiece. However, by using profiled lathe inserts, it is possible to produce the thread profile of the ball nut using turning technology. The applicability of the technology is verified by tooling and experimental machining based on conceptual designs, the results of which are described at the end of the article.
References
Rech, J., Moisan, A. (2003). Surface integrity in finish hard turning of casehardened steels. International Journal of Machine Tools and Manufacture, 43(5), pp. 543-550. https://doi.org/10.1016/S0890-6955(02)00141-4
Bartarya, G., Choudhury, S. (2012). State of the art in hard turning. International Journal of Machine Tools and Manufacture, 53 (1), pp. 1-14. https://doi.org/10.1016/j.ijmachtools.2011.08.019
https://danobatgrinding.com/en/balls-screw-nut-machining (accessed: 8 September 2020).
Introducing Drake GS: VTM-LM (brochure).
Harada, H., Kagiwada, T. (2004). Grinding of high-lead and gothic-arcprofile ball-nuts with free quill-inclination. Precis Eng., 28 (2), pp. 143-151., https://doi.org/10.1016/j.precisioneng.2003.07.003.
Hegedűs, Gy., Patkó, Gy., Takács, Gy. (2012). Determination of Tool Profile for Ballnut Grinding by Numerical Methods. Proceedings of the 13th International Conference on Tools, ICT 2012, ISBN:978 963 998835 4.
Hegedűs, G. (2015). Newton's method-based collision avoidance in a CAD environment on ball nut grinding. The International Journal of Advanced Manufacturing Technology, https://doi. org/10.1007/s00170-015-7796-5
Why hard turning is up to three times faster than grinding. Article- Hembrug Machine Tools, https://www.hembrug.com/hardturningballscrewnuts/.
More, A., Jiang, W., Brown, W., Malshe, A. (2006). Tool wear and machining performance of cBN-TiN coated carbide inserts and PCBN compact inserts in turning AISI 4340 hardened steel. Journal of Materials Processing Technology, 180 (1-3), pp. 253-262., https://doi.org/10.1016/j.jmatprotec.2006.06.013
