Micro-Extrusion for a Gear Shaft

  IJETT-book-cover  International Journal of Engineering Trends and Technology (IJETT)          
  
© 2020 by IJETT Journal
Volume-68 Issue-4
Year of Publication : 2020
Authors : C.E LEE, W.T. Hwang, H.K. Kim
  10.14445/22315381/IJETT-V68I4P203S

MLA 

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 μm 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.

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Keywords
Superplastic, Micro-di, Micro- extrusion, Micro-gear, Micro-forming