Forming Load Calculation of Hot Precision Forging of Cylindrical Gears

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Abstract:

The Tooth Impact Factor was defined and introduced into the formula of forming load of closed-upsetting. Thus the formula for calculating the forming load of hot precision forging of cylindrical gears was put forward. The equation for the Tooth Impact Factor was fitted using the data from FE simulation of forging process in which gears with different modules were forged. Some forging tests for gears were conducted and the forming load was measured to ensure the validity of the formula. The tests also revealed that the formula is suitable for forming load calculation of hot precision forging of both spur and helical gears in a wide size range.

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425-428

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October 2013

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[1] T.A. Dean: The net-shape forming of gears [J]. Materials & Design, 2000, 21(4), pp.271-278.

DOI: 10.1016/s0261-3069(99)00074-6

Google Scholar

[2] K. Ohga, K. Kondo: Research on precision die forging utilizing divided flow (First report, Theoretical analysis of process utilizing flow relief-axis and relief-hole) [J]. Bulletin of JSME, 1982, 25(209), pp.1829-1835.

DOI: 10.1299/jsme1958.25.1828

Google Scholar

[3] J. Choi, H.Y. Cho, et al: An upper-bound analysis for the forging of spur gears [J]. Journal of Materials Processing Technology. 2000, 104, pp.64-73.

DOI: 10.1016/s0924-0136(00)00524-0

Google Scholar

[4] J. Xia, in: Precision plastic forming process [M], 1st edition. Beijing: China Machine Press, 1999, pp.19-21 (in Chinese).

Google Scholar

[5] M.H. Sadeghi: Gear forging-mathematical modeling and experimental validation [J]. Journal of Manufacturing Science and Engineering. 2003, 125, pp.753-762.

DOI: 10.1115/1.1616952

Google Scholar

[6] J. Cai, T.A. Dean, et al: Alternative die designs in net-shape forging of gears [J]. Journal of Materials Processing Technology. 2004, 150, pp.48-55.

DOI: 10.1016/j.jmatprotec.2004.01.019

Google Scholar