Claims
- 1. The method of making a composite cylinder block for an internal combustion engine or the like comprising forming a cylinder liner from a cylinder pipe section, forming at least one port opening in the formed cylinder liner by punching said opening from the inner diameter of said cylindrical pipe section to its outer diameter, and casting at least in part around said cylinder liner a cylindrical block formed from a different material from said cylinder liner.
- 2. The method as set forth in claim 1 including the step of holding the cylinder liner during the casting process.
- 3. The method as set forth in claim 2 wherein the opening formed in the liner is larger than the finished port opening and the cast material is cast into the liner opening.
- 4. The method as set forth in claim 1 wherein the liner is placed on a mandrel having a slidably supported punch for punching the opening and further including a backup die and the step of moving the backup die into engagement with the outer periphery of the liner before the opening is punched.
- 5. The method as set forth in claim 4 wherein there are a plurality of punches and backup dies and the punches are operated in sequence.
- 6. The method as set forth in claim 4 wherein the backup dies support a slug ejector and further including the step of retracting the backup die and ejecting the slug by extending the ejector after the punch has been extended and then returning the backup die into engagement with the liner for urging the punch to its retracted position.
Priority Claims (3)
Number |
Date |
Country |
Kind |
59-262822 |
Dec 1984 |
JPX |
|
59-268452 |
Dec 1984 |
JPX |
|
59-268453 |
Dec 1984 |
JPX |
|
CROSS-REFERENCE TO RELATED APPLICATION
This application is a continuation-in-part of my application "Composite Cylinder Black And Method Of Making It", Ser. No. 704,535, filed Feb. 25, 1985 and assigned to the assignee of this application, now U.S. Pat. No. 4,637,110 issues Jan. 20, 1987.
US Referenced Citations (4)
Foreign Referenced Citations (2)
Number |
Date |
Country |
43233 |
Mar 1980 |
JPX |
759768 |
Oct 1956 |
GBX |
Continuation in Parts (1)
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Number |
Date |
Country |
Parent |
704535 |
Feb 1985 |
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