| 摘要 |
A method of making a connecting rod (10) for attachment to a bearing journal by separation of parts of the connecting rod, comprising forging a powder metal sintered preform to provide a one-piece connecting rod (10) having an annular wall (13) defining a crank opening (12) with a centre axis and with stress risers (22,23) for establishing a cracking plane (24) that extends across said crank opening; providing access for a compression coupling across the cracking plane, while at ambient conditions, applying tension substantially uniformly across the cracking plane (24) to propagate fracture from the stress risers (22,23) along said cracking plane (24) and thereby separate the connecting rod into a cap (52) and body (53) with cracked surfaces, and remating the cap (52) and body (53) by applying a compression coupling through the access (21) to draw said cap (52) and body (54) together under guidance and with metal yielding pressure to effect substantially an exact rematch of said cracked surfaces. |
