Patent ID: 9695866
Date: 2017-07-04
CPC Classifications: B22D,C22C,F16C

Claim:
1. A method for manufacturing a composite bimetallic fracture splitting connecting rod, wherein the connecting rod comprises a connecting rod body, a connecting rod cap, and a fracture splitting layer disposed between the connecting rod body and the connecting rod cap, wherein the connecting rod body and the connecting rod cap comprises a first material, the fracture splitting layer comprises a second material, the method comprising: (A) providing a spacer inside a mold of the connecting rod at a position where the connecting rod body and the connecting rod cap are adjacent to each other, wherein the spacer is a corrugated sheet; (B) casting the first material into the mold to form the connecting rod having the spacer disposed therein; (C) removing the spacer from the connecting rod when a majority of the first material solidifies, creating a cavity inside the connecting rod, wherein a shape of the cavity corresponds to the shape of the spacer; (D) injecting the second material into the cavity, wherein the second material forms the fracture splitting material layer inside the cavity, the fracture splitting material layer bonds to the connecting rod; (E) forging the connecting rod having the fracture splitting material layer; (F) forming a fracture splitting notch in the fracture splitting layer; (G) fracture-splitting the connecting rod to separate the connecting rod body from the connecting rod cap at the fracture splitting layer, wherein the resulting connecting rod body has a first jagged surface and the resulting connecting rod cap has a second jagged surface; and (H) assembling the connecting rod body and the connecting rod cap by mating together the first jagged surface and the second jagged surface, wherein a joint between the first jagged surface and the second jagged surface is in a shape corresponding to the shape of the spacer.