Patent ID: 6145574
Filing Date: 2000-11-14
Classification: B22C,B22D,B23D,F02F,F16C,Y10T

Abstract:
A manufacturing process for manufacturing a cast engine part having a bearing arrangement constructed in several parts through fracture separation, comprising the steps of:forming a core and providing a prefabricated bearing bore;providing at least two separate projections on said core wherein free projection edges of said at least two separate projections have a respective shaping radius between R=0.sub.mm and R.ltoreq.0.45.sub.mm ;producing indentations in a circumferential area of said bearing bore by means of said at least two separate projections on the core wherein said indentations serve as fracture notches;forming the cast engine part by casting metal around the core using said fraction notches as incipient crack sites.