Method of manufacturing a wear resistant cylinder

Details Method of manufacturing a wear resistant cylinder Method of manufacturing a wear resistant cylinder

1998-06-15

1999-10-26

Cuda, Irene

Metal working

Method of mechanical manufacture

Prime mover or fluid pump making

2988803, B23P 1500

Patent

active

059706139

ABSTRACT:
A tappet made of Al alloy is used in a valve operating mechanism of an internal combustion engine of a vehicle. On the whole outer circumferential surface of the tappet, a helical projection and a helical groove are formed alternately to form an uneven surface. A plurality of uneven surfaces are formed on a ridge of the projection at regular intervals. The outer circumferential surface is coated with a wear resistant Fe film by thermal spraying. The uneven surfaces on the projection provide high adhesion strength of the film to the outer circumferential surface of the tappet to improve peel resistance, thereby increasing durability and reliability of the Al alloy tappet.

REFERENCES:
patent: 5228418 (1993-07-01), Doehring
patent: 5280771 (1994-01-01), Groh et al.
patent: 5605122 (1997-02-01), Hara et al.

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