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1. WO1996040469 - METHOD OF MAKING CONNECTING ROD

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[ EN ]

We Claim:

1. A method of manufacturing a component formed of parts capable of being separated for reassembly around another component comprising the steps of:
A) forging a pair of separate parts;
B) bonding the two parts together along interfitting surfaces thereof to form a single part via at least one of mechnaical and metullugical means;

C) machining the resulting single part; and
D) fracturing the single part along a parting line extending along the original interfitting surfaces so as to obtain a pair of parts having two matched surfaces that need no further processing before being reassembled.

2. A method of manufacturing according to claim 1, wherein said separate parts are made of a high strength alloy, high ductility alloy.

3. A method of manufacturing according to claim 2, wherein said interfitting surfaces comprise a ridge having a wedge-shaped cross section formed on one of said parts and a groove having a wedge-shaped cross section formed on the other of said parts.

4. A method of manufacturing according to claim 2, wherein said interfitting surfaces comprise at least one lug formed on one of said parts and a lug-shaped recess formed on the other of said parts.

5. A method of manufacturing according to claim 2, wherein said bonding step is performed by one of forging and cold coining.

6. A method of manufacturing according to claim 5, wherein said interfitting surfaces comprise a ridge having a wedge-shaped cross section formed on one of said parts and a groove having a wedge-shaped cross section formed on the other of said parts.

7. A method of manufacturing according to claim 5, wherein said interfitting surfaces comprise at least one lug formed on one of said parts and a lug-shaped recess formed on the other of said parts.

8. A method of manufacturing according to claim 1, wherein said component is a connecting rod and said pair of parts are a rod part and a cap part which, when assembled together, define a bore having a center lying on said parting line.

9. A method of manufacturing according to claim 8, wherein said separate parts are made of high strength alloy, high ductility alloy.

10. A method of manufacturing according to claim 9, wherein said interfitting surfaces comprise a ridge having a wedge-shaped cross section formed on one of said parts and a groove having a wedge-shaped cross section formed on the other of said parts.

11. A method of manufacturing according to claim 9, wherein said interfitting surfaces comprise at least one lug formed on one of said parts and a lug-shaped recess formed on the other of said parts.

12. A method of manufacturing according to claim 9, wherein said bonding step is performed by one of forging and cold coining.

13. A method of manufacturing according to claim 12, wherein said interfitting surfaces comprise a ridge having a wedge-shaped cross section formed on one of said parts and a groove having a wedge-shaped cross section formed on the other of said parts.

14. A method of manufacturing according to claim 12, wherein said interfitting surfaces comprise at least one lug formed on one of said parts and a lug-shaped recess formed on the other of said parts.

15. A method of manufacturing according to claim 1, wherein step B is performed on the parts produced in step A without preliminary machining thereof.

16. A method of manufacturing according to claim 15, wherein said separate parts are made of high strength alloy, high ductility alloy.

17. A method of manufacturing according to claim 16, wherein said interfitting surfaces comprise a ridge having a wedge-shaped cross section formed on one of said parts and a groove having a wedge-shaped cross section formed on the other of said parts.

18. A method of manufacturing according to claim 16, wherein said interfitting surfaces comprise at least one lug formed on one of said parts and a lug-shaped recess formed on the other of said parts.

19. A method of manufacturing according to claim 16, wherein said bonding step is performed by one of forging and cold coining.

20. A method of manufacturing according to claim 16, wherein said component is a connecting rod and said pair of parts are a rod part and a cap part which, when assembled together, define a bore having a center lying on said parting line.