Bearing cap and method for its fabrication

Details Bearing cap and method for its fabrication Bearing cap and method for its fabrication

F - Mech Eng,Light,Heat,Weapons

16

C

F16C 33/14 (2006.01) F16C 9/02 (2006.01)

Patent

CA 2537490

Crankshaft bearing cap 1 presenting on one of its faces a semi-cylindrical notch (2), formed by powder metallurgy with an iron powder blend molded by compaction and sintering, and partially infiltrated with Cu, being the area (A) adjacent to the area A around the notch 2, the one with highest Cu content. A method for manufacturing main bearing caps by infiltration of Cu comprising the steps of placing the molded cap so that the axis of the semi- cylindrical notch extends in a horizontal direction and the notch cavity is in the upwards position. Placing high Cu content tablets on the upper face of the cap and on the cylindrical arch and sintering of the cap and Cu tablets system.

L'invention concerne un couvercle de palier de vilebrequin (1) présentant, sur l'une de ces faces, une encoche semi-cylindrique (2) formée par métallurgie des poudres avec un mélange de poudres de fer moulé par compactage et frittage, et en partie infiltrée avec du cuivre (Cu); la zone (A) adjacente à la zone (A) autour de l'encoche (2) étant la zone présentant la plus grande teneur en Cu. Cette invention concerne également un procédé permettant de fabriquer des couvercles de palier principal par infiltration de Cu ; lequel procédé consiste à placer le couvercle moulé de telle sorte que l'axe de l'encoche semi-cylindrique s'étende horizontalement et que la cavité de l'encoche se trouve dans une position verticale ; à placer des pastilles à haute teneur en Cu sur la surface supérieure du couvercle et sur l'arche cylindrique, puis à fritter le couvercle et l'ensemble des pastilles de cuivre.

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