High pressure fuel injection pipe and a method of making the...

Details High pressure fuel injection pipe and a method of making the... High pressure fuel injection pipe and a method of making the...

F - Mech Eng,Light,Heat,Weapons

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F16L 9/02 (2006.01) B21D 19/00 (2006.01) B21D 51/10 (2006.01) F02M 55/00 (2006.01)

Patent

CA 1044163

HIGH PRESSURE FUEL INJECTION PIPE AND A METHOD OF MAKING THE SAME ABSTRACT OF THE DISCLOSURE A high pressure fuel injection pipe is produced by squeezing an end portion of a small-diametered steel pipe member having a flow path extending through the center thereof to form a flow path of reduced diameter in the end portion communicating with the central flow path, pressing and plastically shaping the end portion into a frusto-conical or arcuate-surfaced connecting head, and grinding minute curve concavo- convex faces created in the inner surface of the flow path of reduced diameter during the plastic shaping to thereby form a flow path equal in diameter and communicating with the flow path in the small-diametered steel pipe member.

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