Abstract
Aiming at the lightweight of gears, this article presents the hot forging process of a bi-metal gear fabricated by two metals of steel (tooth ring material) and aluminum alloy (core material). The process was studied by the finite element (FE) simulation and forming experiment. The FE model of the bi-metal gear forging process was established based on the symmetry of the gear and the structure of forging die by using the software Deform-3D. The hot forging experiment of the bi-metal gear was carried out to verify the accuracy of the FE simulation by the comparison of the metal flow behavior. Metal flow of three stages, namely upsetting, gap and tooth filling, and corner filling was analyzed in the hot forging process. Effects of three aspects including the gap between the core and ring, the height difference between the core and ring, and the ring thickness on the metal flow and forming load were investigated. The results of numerical simulation showed that different gaps and different height differences between the core and ring influence the relative flow of two metals and different ring thicknesses significantly influence the structure of the bi-metal gear; large gap and small height difference between the core and ring and small ring thickness can reduce the forming load.
Similar content being viewed by others
References
Dobrzanski LA, Tanski T, Cizek L, Brytan Z (2007) Structure and properties of magnesium cast alloys. J Mater Process Technol 192:567–574
Ohrn KE (2008) Aircraft energy use. In: Encyclopedia of energy engineering and technology. Taylor & Francis: Florida, pp. 24–30
Rakhit AK (2000) Heat treatment of gears—a practical guide for engineers. ASM International, Materials Park, OH
Rongfeng S (2012) Design of skidding carriage gear mechanism based on lightweight. J Huazhong Univ Sci Technol (Nat Sci Ed) (S2):98–101 (in Chinese)
Jing SK, Zhang H, Zhou JT, Song GH (2015) Optimum weight design of functionally graded material gears. Chin J Mech Eng 28(6):1186–1193 (in Chinese)
Wadleigh AS (1993) Multi-metal composite gear/shaft—produced by consecutively forming, friction welding, reforming and friction welding, then machining three elements of dissimilar metals. US Patent No.5,492,264, December 21
Igor K, Dejan M, Miroslav P, Dragiša V (2013) Preliminary investigation of cold forward, backward and radial extrusion of bi-metallic billets. J Technol Plast 38(2):134–142
Politis DJ, Lin J, Dean TA, Balint DS (2014) An investigation into the forging of bi-metal gears. J Mater Process Technol 214(11):2248–2260
Yang X (2014) Investigation of formability and fracture in advanced metal forming process—bulk forging and sheet metal forming, PhD. thesis, Mechanical Engineering, The Ohio State University
Bulent C, Robert C. G, B. Lynn F (2016) Hot hydroforging of lightweight bimaterial gears and hollow products. Paper presented at the 23rd IFHTSE Congress, Hyatt Regency Savannah, Georgia, April 20, 2016
Robert C. G, Yang X, Bulent C, B. Lynn F (2016) Modeling of the heating sequences of lightweight bimaterial billets for hot forging. Paper presented at the 23rd IFHTSE Congress, Hyatt Regency Savannah, Georgia, April 21, 2016
Alves ML, Rodrigues JMC, Martins PAF (2001) Cold forging of gears: experimental and theoretical investigation. Finite Elem Anal Des 37(6):549–558
Khalilpourazary S, Dadvand A, Azdast T, Sadeghi MH (2011) Design and manufacturing of a straight bevel gear in hot precision forging process using finite volume method and CAD/CAE technology. Int J Adv Manuf Technol 56(1–4):87–95
Dean TA (2000) The net-shape forming of gears. Mater Des 21(4):271–278
Berviller L, Bigot R, Martin P (2006) Technological information concerning the integrated design of “net-shape” forged parts. Int J Adv Manuf Technol 31(3–4):247–257
Baudouin C, Bigot R, Leleu S, Martin P (2008) Gear geometric control software: approach by entities. Int J Adv Manuf Technol 38(1–2):120–129
Chen CC (2015) Grain-size effect on the forging formability of mini gears. Int J Adv Manuf Technol 79(5):863–871
Pozuelo M, Carreno F, Cepeda-Jiménez CM, Ruano OA (2008) Effect of hot rolling on bonding characteristics and impact behavior of a laminated composite material based on UHCS-1.35 Pct C. Metall Mater Trans A 39(3):666–671
Wang BY, Zuo B, Yang LY, Li Z, Zheng MN (2014) Forming process study and defect analysis of precision forging for the gear shafts of oil pumps. J Univ Sci Technol Beijing 36(8):1087–1093 (in Chinese)
Zhang DW, Yang H, Sun ZC (2010) Finite element simulation of aluminum alloy cross valve forming by multi-way loading. Trans Nonferrous Metals Soc China 20(6):1059–1066
Zhang W, Liu Y, Wang L, Liu B (2012) Numerical simulation and physical analysis for dynamic behaviors of P/M TiAl alloy in hot-packed forging process. Trans Nonferrous Metals Soc China 22(4):901–906
Ji H, Liu J, Wang B, Zheng Z, Huang J, Hu Z (2015) Cross-wedge rolling of a 4Cr9Si2 hollow valve: explorative experiment and finite element simulation. Int J Adv Manuf Technol 77(1–4):15–26
Sadeghi MH (2003) Gear forging: mathematical modeling and experimental validation. J Manuf Sci Eng 125(4):753–762
Fang G, Zhou J, Duszczyk J (2008) Extrusion of 7075 aluminium alloy through double-pocket dies to manufacture a complex profile. J Mater Process Technol 209(6):3050–3059
Wu HY, Lee SY, Wang JY (1998) Solid-state bonding of iron-based alloys, steel-brass, and aluminum alloys. J Mater Process Technol 75(1–3):173–179
Hidetoshi S, Hiroyuki W, Toshiji M, Kenji H (2003) Low temperature diffusion bonding in a superplastic AZ31 magnesium alloy. Scr Mater 48(9):1249–1254
Choi JC, Choi Y (1999) Precision forging of spur gears with inside relief. Int J Mach Tools Manuf 39(10):1575–1588
Jinn-Jong S, Cheng-Hsien Y (2009) Preform and forging process designs based on geometrical features using 2D and 3D FEM simulations. Int J Adv Manuf Technol 44(3–4):244–254
Peng XK, Heness G, Yeung WY (1999) Effect of rolling temperature on interface and bond strength development of roll bonded copper/aluminum metal lamintes. J Mater Sci 34(2):227–281
Aziz E, Chassapis C (2014) Comparative analysis of tooth-root strength using stress–strength interference (SSI) theory with FEM-based verification. Int J Interact Des Manuf 8(3):159–170
Tanaka K, Kumagai M, Yoshida H (2006) Dissimilar joining of aluminum alloy and steel sheets by friction stir spot welding. J Jpn Inst Light Met 56(6):317–322
Movahedi M, Madaah HR, Kokabi AH (2008) The influence of roll bonding parameters on the bond strength of Al-3003/Zn soldering sheets. Mater Sci Eng A 487(1–2):417–423
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Wu, P., Wang, B., Lin, J. et al. Investigation on metal flow and forming load of bi-metal gear hot forging process. Int J Adv Manuf Technol 88, 2835–2847 (2017). https://doi.org/10.1007/s00170-016-8973-x
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s00170-016-8973-x