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Evaluation of effects of geometrical parameters on density distribution in compaction of PM gears
KTH, School of Industrial Engineering and Management (ITM), Production Engineering, Welding Technology.ORCID iD: 0000-0003-1021-0100
KTH, School of Industrial Engineering and Management (ITM), Production Engineering, Welding Technology. SWEREA KIMAB, Sweden.ORCID iD: 0000-0002-6061-662X
2017 (English)In: Proceedings of the 20th International Esaform Conference on Material Forming: ESAFORM 2017, American Institute of Physics (AIP), 2017, Vol. 1896, 050006Conference paper (Refereed)
Abstract [en]

The usage of powder metallurgy (PM) for manufacturing of transmission components in automotive industries has been studied by many researchers. PM components have become of interest in recent years due to advancements in post processing possibilities such as hot isostatic pressing (HIP). Still in many of the forming process routes for making components from PM materials, the compaction of the powder into green component is the first step. Compaction is required to put the powder into the near net shape of the desired component and it causes a density gradient in the body of the green component. Basically the friction between powder particles and between the powder particles and die walls are the well-known roots for such density gradients in the compacted component. Looking at forming of PM gears, the gradient in density is one of the most important roots of problems in the processing of PM gears as well. That is because making a gear with full density and no pores will be very costly if large density gradients exist in the green component. The purpose of this study is to find the possible relations between the gear geometry and the density gradients in the green component after compaction in addition to the friction effects. For this purpose several gears should be tested. To reduce the research costs, the finite element (FE) method is used. First a FE model of the compaction process is developed and verified. To investigate the relations between the density gradients and the gear parameters such as addendum diameter (da) and the face width (b) several gear geometries have been studied. The compaction of selected gears is simulated using the FE model. The simulations results which are the distribution of density in the green component are evaluated and discussed and conclusion are made based on them.

Place, publisher, year, edition, pages
American Institute of Physics (AIP), 2017. Vol. 1896, 050006
Series
AIP Conference Proceedings, ISSN 0094-243X ; 1896
National Category
Composite Science and Engineering
Identifiers
URN: urn:nbn:se:kth:diva-220428DOI: 10.1063/1.5008051Scopus ID: 2-s2.0-85037696974ISBN: 9780735415805 OAI: oai:DiVA.org:kth-220428DiVA: diva2:1168452
Conference
20th International ESAFORM Conference on Material Forming, ESAFORM 2017, Dublin City University, Dublin, Ireland, 26 April 2017 through 28 April 2017
Note

QC 20171220

Available from: 2017-12-20 Created: 2017-12-20 Last updated: 2017-12-20Bibliographically approved

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Khodaee, AlirezaMelander, Arne

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