Micro-Extrusion for a Gear Shaft
Citation
MLA Style: C.E LEE, W.T. Hwang, H.K. Kim "Micro-Extrusion for a Gear Shaft" International Journal of Engineering Trends and Technology 68.4(2020):13-17.
APA Style:C.E LEE, W.T. Hwang, H.K. Kim. Micro-Extrusion for a Gear Shaft International Journal of Engineering Trends and Technology, 68(4),13-17.
Abstract
A micro extrusion machine has been developed, and micro dies were fabricated by laser micro machining. The extrusion process was conducted under constant pressure at co nstant temperatures ranging from 503 to 563K. Micro gear shafts with gear dimensions of 0.1 in module and 800 ?m in pitch circle diameter were extruded using fine grained superplastic alloy. In micro extrusion, the tool surface roughness and lubrication in fluence the forming behavior and produce a threshold in punch load. The extrusion load increases with extrusion rate under constant extrusion temperature. For the results of micro extrusion simulation with friction coefficient of 0.3 at 563K, the maximum s tress is almost 90% of the maximum effective stress from the experimental result. The difference between the simulation and experimental results is due to the neglect of size effects. The micro extrusion process was proven to successfully produce a micro g ear shaft using a fine grained superplastic alloy.
Reference
[1] H. Fujita, “Microactuators and Micromachines”, Proceedings of IEEE, vol. 86, no. 8, pp. 1721-1732, 1998.
[2] S.K. Chung, “A Micro Cycloid-Gear System Fabricated by Multi-Exposure LIGA Technique”, Microsystem Technologies, vol. 6, pp. 149-153, 2000.
[3] M.S. Yeh, H.Y. Lin, H.T. Lin, and C.B. Chang, “Superplastic Micro-Forming with a Fine Grained Zn-22AlAl Eutectoid Alloy Using Hot Embossing Technology”, Journal of Materials Processing Technology, vol. 180, pp. 17-22, 2006.
[4] Y. Saotome and H. Iwazaki, “Superplastic Extrusion of Micro-Gearshaft of 10 ?m in Module”, Microsystem Technologies, vol. 6, pp.126-129, 2000.
[5] Y. Saotome and H. Iwazaki, “Superplastic Backward Microextrusion of Microparts for Micro-Electro-Mechanical Systems”, Journal of Materials Processing Technology, vol. 119, pp. 307-311, 2001.
[6] S.G. Kang, Y.S. Na, K.Y. Park, J.E. Jeon, S.C. Son, and J.H. Lee, “A Study on the Micro-Formability of Al 5083 Superplastic Alloy Using Micro-Forging Method”, Materials Science and Engineering A, vol. 449-451, pp. 338-342, 2007.
[7] M.A. Mossain, S.T. Hong, K.Y. Park, and Y.S. Na, “Microforming of Superplastic 5083 Aluminum Alloy”, Transactions of Nonferrous Metals Society of China, vol. 22, pp. s656-s660, 2012.
[8] W. Presz, B. Andersen, and T. Wanheim, “Piezoelectric Driven Micro-Press for Microforming”, Journal of Achievements in Materials and Manufacturing Engineering, vol. 18, no. 1-2, pp. 411-414, 2006.
[9] F.A. Mohamed, M. Ahmed, and T.G. Langdon, “Factors Influencing Ductility in the Superplastic Zn-22 pct Al Eutectoid”, Metallugical Transactions, vol. 8A, pp. 933-938, 1977.
[10] U. Engel and R. Eckstein, “Microforming-from Basic Research to Its Realization”, Journal of Materials Processing Technology, vol. 125, pp. 35-44, 2002.
[11] A. Messner, U. Engel, R. Kals, and F. Vollertsen, “Size Effect in the FE-Simulation of Micro-Forming Processes”, Journal of Materials Processing Technology, vol. 45, pp. 371-379, 1994.
Keywords
Superplastic, Micro-di, Micro- extrusion, Micro-gear, Micro-forming