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2008 (English)Independent thesis Advanced level (professional degree), 20 credits / 30 HE creditsStudent thesis

Abstract [en] : In this master thesis a wear study on tools for mechanical cutting is made. In every mechanical cutting process wearing of the tool occurs, this wear process is very complex and it is of interest to be able to model this process to increase the understanding of wear among cutting tool developers. This thesis is studying two different wear models, Huang's and Usui's wear models, these two describe the volume wear rate on the tool depending on cutting data and material parameters, and need to be calibrated with experimental tests to function properly. As a first step to a complete wear model this thesis handles the models for a simple 2-D case. Therefore the tests are made in a CNC-late by grooving flenses with triangular inserts that has no chip breakers. For simplicity in the measure process during the testing the models will be studied for flank wear. The suggested model is also used in the commercial FE-software AdvantEdge to investigate how good resemblance there is between the simulation with the calibrated model and the experiments made. The results show that for this case Usui's model give a better resemblance with the experiments and are more stable in the calibration process than Huang's model is. This means that the calibration process gives close to the same answer independent on which test data that is used in the calibration process, which was not the case for Huang's model. Therefore this model is suggested as a tool for tool developers to increase the understanding of the wear process. The simulations give larger wear than measured during experiments: this can be explained by several generalizations made here, as equally distributed forces and constant temperature during the whole wear process. The suggested model can be implemented in a 3-D case, for this to work, force and temperature models for that case need to exist and be used as input to the wear model so a next step in creating a complete wear model would be to develop such models.

Place, publisher, year, edition, pages: 2008.

Keyword [en] : Technology, Mechanical cutting, Wear, Wear mechanism, Cutting tools, FE-, modeling

Keyword [sv] : Teknik

Identifiers: URN: urn:nbn:se:ltu:diva-46947ISRN: LTU-EX--08/066--SELocal ID: 48c1aff3-94b2-41b8-b38e-1d9cf62529caOAI: oai:DiVA.org:ltu-46947DiVA: diva2:1020263

Subject / course: Student thesis, at least 30 credits

Educational program: Mechanical Engineering, master's level

Examiners : Lindgren, Lars-Erik

Note: Validerat; 20101217 (root)Available from: 2016-10-04 Created: 2016-10-04Bibliographically approved



Autor: Wassdahl, Jonas

Fuente: http://ltu.diva-portal.org/







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