Planetary carriers for 4WD have complicated shapes with undercuts. Although steel carriers which are machined and joined by the laser beam welding technique are mainly used, thin-walled PM (powder metallurgy) carriers are developed, and achieved weight reductions of 13 % taking advantage of powder metallurgy technology. Two types of carriers for 4WD are developed according to the following targets, i.e reducing weight more than 10 % compared with the original design and unifying components for saving tool cost. Firstly, weight of plates, columns, and ring portions are reduced by FEM (Finite Element Method) analysis. Secondly, a new brazing method is developed in order to diminish the deformation of the thin-walled section; to this end the brazing alloy is inserted into holes which are formed by the punch face. Production of thin-walled and light-weight carriers is realized with unifying components.
Development of thin-walled and light-weight carriers for 4WD
Entwicklung von dünnwandigen und leichten Planetenrädern für den 4WD
2008
13 Seiten, 20 Bilder, 2 Tabellen, 2 Quellen
Conference paper
English
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