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The effect of manufacturing tolerances on the thermomechanical load of gearbox synchronizers
KTH, School of Industrial Engineering and Management (ITM), Machine Design (Dept.), Machine Design (Div.).ORCID iD: 0000-0002-6644-7441
KTH, School of Industrial Engineering and Management (ITM).
KTH, School of Industrial Engineering and Management (ITM), Machine Design (Dept.), Machine Elements. KTH, School of Industrial Engineering and Management (ITM), Machine Design (Dept.), Tribologi. KTH, School of Industrial Engineering and Management (ITM), Machine Design (Dept.), Machine Design (Div.).ORCID iD: 0000-0002-2578-9453
2018 (English)Conference paper, Published paper (Refereed)
Abstract [en]

Transmission performance is crucial for heavy trucks and connected vehicles in general and for platooning of trucks in particular. Gearbox synchronizers are highly loaded conical friction brakes used during gear shifts. Service life and, thus, the gear shifting reliability, of the synchronizer depend on the local thermomechanical loading of the contact surface. To achieve a robust and cost-efficient system, more knowledge is needed of how manufacturing tolerances affect the local thermomechanical loading and therefore service life and reliability of a synchronizer. The effects from angle deviations between the mating cones and cone out-of-roundness on focal maximum temperature during a synchronization sequence have been studied with transient thermomechanical simulations. It is shown that thermomechanical effects will significantly magnify the nominal effects on synchronization performance caused by shape deviations given by the specified manufacturing tolerances.

Place, publisher, year, edition, pages
Elsevier, 2018. p. 1202-1207
Keywords [en]
Gear shift, Manufacturing tolerances, Roundness, Synchronizer, Thermomechanical, Automobiles, Fits and tolerances, Gears, Synchronization, Trucks, Vehicle transmissions, Gear-shifts, Thermo-mechanical, Gear manufacture
National Category
Tribology (Interacting Surfaces including Friction, Lubrication and Wear)
Identifiers
URN: urn:nbn:se:kth:diva-236388DOI: 10.1016/j.procir.2018.03.050Scopus ID: 2-s2.0-85049591381OAI: oai:DiVA.org:kth-236388DiVA, id: diva2:1260215
Conference
51st CIRP Conference on Manufacturing Systems, CIRP CMS 2018, 16 May 2018 through 18 May 2018
Note

QC 20181101

Available from: 2018-11-01 Created: 2018-11-01 Last updated: 2018-11-01Bibliographically approved

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Häggström, DanielSellgren, UlfBjörklund, Stefan

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Machine Design (Div.)School of Industrial Engineering and Management (ITM)Machine ElementsTribologi
Tribology (Interacting Surfaces including Friction, Lubrication and Wear)

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