Method for the production of a sealing ring

Patent metadata

Field	Value
Publication number	US-9816615-B2
Application number	US-67096808-A
Country	US
Kind code	B2
Filing date	Jul 23, 2008
Priority date	Aug 1, 2007
Publication date	Nov 14, 2017
Grant date	Nov 14, 2017

Abstract

A method for producing a sealing ring comprises cutting a sheet-metal strip to a length of a ring circumference using laser cutting; forming the sheet-metal strip into a ring shape having first and second mutually contacting edge surfaces; and joining the first and second mutually contacting edges using laser welding so as to form a substance-to-substance bond.

First claim

The invention claimed is:

1. A method for producing a sealing ring having an outside circumference forming a sealing surface, the method comprising:
cutting a sheet-metal strip to a length of a ring circumference using laser cutting;
forming the sheet-metal strip into a ring shape having first and second mutually contacting edge surfaces;
joining the first and second mutually contacting edge surfaces using laser welding assisted by a feeding of a flux so as to form a substance-to-substance bond;
and calibrating the ring,
wherein the cutting includes first producing the ring with undersized dimensions and the calibrating includes widening the ring to nominal dimensions so as to form the sealing surface at the outside circumference;
further comprising profiling a first and a second circumferential edge of the ring shape using a non cutting process.

2. The method as recited in claim 1 , wherein the profiling includes roll-forming.

Assignees

• Stahl Hermann
• Freudenberg Carl Kg

Inventors

• Stahl Hermann

Classifications

• B23K26/38

  by boring or cutting · CPC title

• B23K26/262

  of longitudinal seams of tubes · CPC title

• F16J15/3252 Primary

  with rigid casings or supports · CPC title

• F16J15/328

  Manufacturing methods specially adapted for elastic sealings (moulding B29C) · CPC title