Two-step PM forging for precise fabrication of carbon fiber reinforced engineering plastic gears
AIZAWA Tatsuhiko, MIYATA Tomohiro, ENDO Kiyoyukidownload PDF
Abstract. Carbon fiber reinforced engineering plastic (CFREP) small-sized parts were fabricated by PM (Powder Metallurgy)-oriented forging process. This manufacturing procedure consisted of the green compaction and sinter-forging steps. In the first step, the CFREP powders were consolidated to a green compact with high density. This preform was further sinter-forged into a final product by hot stamping with the use of the induction heating unit. Hardness distribution was measured to describe the consolidation behavior with increasing the compression load, and to optimize the sinter-forging conditions for solidifying the green compact to the sintered product. X-ray tomography was utilized for non-destructive diagnosis on the residual pores and defects. The eight-teeth gear model was fabricated to demonstrate that two step procedure wrought well to yield the dense and defect-free gear with sufficient strength and integrity.
Carbon Fiber Composites, Engineering Plastics, Gears, Powder Metallurgy, Green Compaction, Sinter-Forging, Die Technology
Published online 4/19/2023, 10 pages
Copyright © 2023 by the author(s)
Published under license by Materials Research Forum LLC., Millersville PA, USA
Citation: AIZAWA Tatsuhiko, MIYATA Tomohiro, ENDO Kiyoyuki, Two-step PM forging for precise fabrication of carbon fiber reinforced engineering plastic gears, Materials Research Proceedings, Vol. 28, pp 1799-1808, 2023
The article was published as article 195 of the book Material Forming
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 I. M. Low, Y. Dong, Composite Materials – Manufacturing, properties and applications -. 1st Ed. Elsevier, London, UK, 2021.
 D. Ozkan, M.S. Gok, A.C. Karaoglanli, Carbon fiver reinforced polymer composite materials, their characteristic properties, industrial application areas and their machinability, Eng. Des. Appl. III (2020) 235-253. https://doi.org/10.1007/978-3-030-39062-4_20
 K. Terada, Carbon fiber reinforced thermos-plastics – Currently, applications and forecast, J. JSPE 81 (2015) 485-488.
 R.J.H. Wanhill, Carbon fiber polymer matrix structural composites, in: N. Eswara Prasad, R.J.H. Wanhill (Eds.), Aerospace Materials and Material Technologies, Springer Singapore, 2017, pp. 309-341. https://doi.org/10.1007/978-981-10-2134-3
 C. Dong, J. Zhou, X. Ji, Y. Yin, X. Shen, Study of the curing process of carbon fiber reinforced resin matrix composites in autoclave processing, Procedia Manuf. 37 (2019) 450-458. https://doi.org/10.1016/j.promfg.2019.12.073
 M. Okayasu, M. Sato, Hot-stamping technology for carbon fiber reinforced thermoplastic plates based on electrical resistance heating, J. Compos. Mater. 54 (2019) 002199831987755. http://doi.org/10.1177/0021998319877559
 C. Guo, J. He, Y. Su, S. Li, Thermo-stamping co-curing process for CFRP/steel hybrid sheets and its interface strength improvement, Compos. Struct. 241 (2020) 112108. https://doi.org/10.1016/j.compstruct.2020.112108
 Y. Kageyama, K. Akai, N. Nishio, K. Kageyama, Selection of molding method for CFRP automotive body parts – resin injection vs. Compression, Proc. APMS 2015 (2015) 455-463.
 V. Vullo, Gears. Vol. 2: Analysis of load carrying capacity and strength design, Springer, 2020.
 Z. Liu, Z. You, Z. Wang, Lightweight design of multistage gear reducer based on continuous variables and discrete neighborhood, Proc. ICMD 2017 (2017) 379-387.
 I. Tsitsimpelis, C.J. Taylor, B. Lennox, M J. Joyce, A review of ground-based robotic systems for the characterization of nuclear environments, Progress in Nuclear Energy 111 (2019) 109-124. https://doi.org/10.1016/j.pnucene.2018.10.023
 I. Chang, Y. Zhao, Advances in powder metallurgy –properties, processing and applications, Woodhead Publishing, 2013.
 K. Peng, H. Pan, Z. Zheng, J. Yu, Compaction behavior and densification mechanisms of Cu – W composite powders, Powder Technol. 382 (2021) 478-490. https://doi.org/10.1016/j.powtec.2021.01.013
 A. Fais, A faster FAST: Electro-sinter-forging, Metal powder Rep. 73 (2018) 80-86. https://doi.org/10.1016/j.mprp.2017.06.001
 Information on https://khkgears.net/new/plastic_gears.html
 M. Yan, L.L. Li, Chen, N. Li, Y. Jiang, Z. Xu, M. Jing, Y. Hu, L. Liu, X. Zhang, Radiation resistance of carbon fiber reinforced epoxy composites optimized synergistically by carbon nanotubes in interface area/matrix, Compos. Part B: Eng. 172 (2019) 447-457. https://doi.org/10.1016/j.compositesb.2019.04.041