Duplex powder metal bearing caps and method of making them

Details Duplex powder metal bearing caps and method of making them Duplex powder metal bearing caps and method of making them

F - Mech Eng,Light,Heat,Weapons

16

C

F16C 17/02 (2006.01) B22F 5/00 (2006.01) C22C 1/04 (2006.01) F16C 9/02 (2006.01) F16C 9/04 (2006.01) F16C 33/06 (2006.01) F16C 33/14 (2006.01)

Patent

CA 2361986

A main bearing cap (A') made of powder metal has a body portion (Y) made from one powder metal material (Q), and a bearing arch portion (H), foot joint face portions (S) and/or wings (W) made of a different powder metal material (P). The material (Q) of the body portion (Y) is harder than the material (P) of the other portions (H, S, W), and the material (P) of the other portions (H, S, W) is relatively machinable. For the bearing arch portion (H), the machinability of the material (P) approximately matches the machinability of the bearing support structure (B) to which the bearing cap (A') is assembled to produce a good quality bore and longer tool life during line boring. The bearing arch material (P) may be a bearing material.

La présente invention concerne un chapeau principal (A') fait en poudre de métal et constitué d'un corps (Y) fait d'un premier matériau à base de poudre de métal, ainsi que d'un arceau de chapeau (H), de liserés de surface d'appui inférieure (S) et/ou de semelles (W) faits d'un autre matériau à base de poudre de métal. Le matériau (Q) du corps (Y) est plus dur que le matériau (P) utilisé pour les autres parties (H, S, W). En outre, le matériau (P) des autres parties (H, S, W) est relativement usinable. S'agissant de l'arceau (H), l'usinabilité du matériau (P) correspond sensiblement à l'usinabilité de la structure du support du palier (B) auquel est assemblé le chapeau (A') de façon à obtenir une bonne qualité d'alésage et d'augmenter la durée de vie de l'outil pendant l'alésage. Le matériau de l'arceau du palier (P) peut être du matériau de palier.

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