Form-Relieving Method for Thread Mills

The paper presents a form-relieving method for thread mill teeth by means of a grinding wheel rotated about two axes, which significantly simplifies design process for tool manufacturing, since combining rotation angles makes it possible to use the same standard grinding wheel to profile thread mills of several size classes, accounting for acceptable accuracy class for the thread being processed. The algorithm and software proposed, based on the mathematical technique we developed, allow the user to compute the grinding wheel positioning angles to obtain the desired relief angles for a thread mill. We present an example of computing the grinding wheel rotation angles for a set of input data

References

[1] Baklunov E.D. Raschet konstruktivnykh parametrov zatylovannykh fasonnykh frez [Calculation of the design parameters of tapered shaped milling cutters]. Moscow, Bauman MVTU Publ., 1984.

[2] Rodin P.R. Metallorezhushchie instrument [Metal-cutting tools]. Kiev, Vishcha shkola Publ., 1974.

[3] Baranchikov V.I., ed. Spravochnik konstruktora-instrumentalshchika [Handbook of tool-maker engineer]. Moscow, Mashinostroenie Publ., 1994.

[4] Dreval A.E., Grubyy S.V., Litvinenko A.V. Zatylovanie zubyev rezhushchikh instrumentov [Form-relieving of cutting tools teeth]. Moscow, Bauman MSTU Publ., 1999.

[5] Semenchenko I.I., Matyushin V.M., Sakharov G.N. Proektirovanie metallorezhushchikh instrumentov [Designing metal cutting tools]. Moscow, Mashgiz Publ., 1962.

[6] Tulpa S.M. Rezboshlifovalnye raboty [Thread grinding]. Moscow, Vysshaya shkola Publ., 1965.

[7] Menshakov V.M., Urlapov G.P., Sereda V.S. Besstruzhechnye metchiki [Threadless taps]. Moscow, Mashinostroenie Publ., 1976.

[8] Tsepkov A.V. Profilirovanie zatylovannykh instrumentov [Profiling of backed-off tools]. Moscow, Mashinostroenie Publ., 1979.

[9] Mishkin S.V. Profiling and optimization of the installation of grinding wheels for tightening precision worm cutters. Izvestiya vysshikh uchebnykh zavedeniy. Mashinostroenie [Proceedings of Higher Educational Institutions. Маchine Building], 2007, no. 11, pp. 63–68 (in Russ.).

[10] Feldshteyn E.E., Kornievich M.A. Metallorezhushchie instrument [Metal-cutting tools]. Minsk, Novoe znanie Publ., 2009 (in Russ.).

[11] Levitskiy M.Ya. Rezbofrezerovanie [Thread milling]. Kiev, Mashgiz Publ., 1950 (in Russ.).

[12] Malkov O.V., Litvinenko A.V. General case of the teeth profiling for drill-thread-mill threading part. Vestn. Mosk. Gos. Tekh. Univ. im. N.E. Baumana, Mashinostr. [Herald of the Bauman Moscow State Tech. Univ., Mechan. Eng.], 1997, no. 2, pp. 77–84 (in Russ.).

[13] Malkov O.V. Teeth profiling of thread milling cutters with helical flutes. Nauka i obrazovanie: nauchnoe izdanie [Science and Education: Scientific Publication], 2013, no. 6 (in Russ.).

[14] Malkov O.V. Design and research of calculation models of the tooth profile angles of thread milling cutter with helical flutes. Nauka i obrazovanie: nauchnoe izdanie [Science and Education: Scientific Publication], 2014, no. 3 (in Russ.). DOI: 10.7463/0314.0702743

[15] Malkov O.V., Malkova L.D. Developing a mathematical model of the tooth profile angles of thread milling cutter with helical flutes. Nauka i obrazovanie: nauchnoe izdanie [Science and Education: Scientific Publication], 2014, no. 4 (in Russ.). DOI: 10.7463/0414.0707227

[16] MIKROMAT. Grinding machines. MIKROMAT: website. Available at: http://www.mikromat.net/downloads/G-Flyer_en_w.pdf (accessed: 07.12.2017).

[17] Hill F.S. Computer graphics: using OpenGL. Prentice Hall, 2001.

[18] Bronshteyn I.N., Semendyaev K.A. Spravochnik po matematike dlya inzhenerov i uchashchikhsya vtuzov [Handbook on mathematics for engineers and students of technical colleges]. Moscow, Nauka Publ., 1986.