Method for the production of pistons having depression edge...

Details Method for the production of pistons having depression edge... Method for the production of pistons having depression edge...

2006-10-31

2006-10-31

Bryant, David P. (Department: 3729)

Metal working

Method of mechanical manufacture

Prime mover or fluid pump making

C029S888040, C029S888042, C029S888044, C029S525140, C029S411000, C029S418000, C092S222000, C092S224000

Reexamination Certificate

active

07127813

ABSTRACT:
A method for the production of pistons having depression edge armoring for internal combustion engines, in which a more heat-resistant armoring ring, in comparison with a forged piston blank having a combustion depression, is connected with the piston blank in the region of the depression edge. The method comprises the following steps:a first piston blank is set on a projection of the armoring ring in the region of the depression edge;the armoring ring is connected with the first piston blank by friction-welding;a second piston blank is set onto the projection of the armoring ring, in such a manner that the two piston blanks do not touch;the second piston blank is connected with the armoring ring by means of friction-welding;a the armoring ring is cut between the piston blanks, andthe pistons are given their final shape by a cutting work method.

REFERENCES:
patent: 4353517 (1982-10-01), Rudolph
patent: 4838149 (1989-06-01), Donnison et al.
patent: 6604284 (2003-08-01), Kato et al.
patent: 33 04 903 (1984-08-01), None
patent: 260 844 (1988-10-01), None
patent: 101 46 079 (2003-04-01), None
patent: 63256287 (1988-10-01), None
patent: 63256287 (1988-10-01), None

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