Spark plug electrode with a deep welding seam, spark plug with the spark plug electrode, and production method for the spark plug electrode

An electrode for a spark plug, comprising:

• an electrode base body;
• a cylindrical wear part, the wear part having a longitudinal axis that extends from a first end face of the wear part, facing the electrode base body, to a second end face situated opposite the first end face, and the wear part having at least one first region and at least one second region, the wear part not being fused in the at least one first region and the wear part being fused in the at least one second region, and, in a sectional plane of the longitudinal axis, a first transition between the at least one first region and the at least one second region on a jacket surface of the wear part being designated as point A, and in the sectional plane, a second transition between the at least one first region and the at least one second region, situated closest to the longitudinal axis in the sectional plane, being designated as point C;
• wherein the distance AC has an angle α to the longitudinal axis and α is greater than or equal to 45°.

A spark plug having at least one electrode, the at least one electrode including an electrode base body, a cylindrical wear part, the wear part having a longitudinal axis that extends from a first end face of the wear part, facing the electrode base body, to a second end face situated opposite the first end face, and the wear part having at least one first region and at least one second region, the wear part not being fused in the at least one first region and the wear part being fused in the at least one second region, and, in a sectional plane of the longitudinal axis, a first transition between the at least one first region and the at least one second region on a jacket surface of the wear part being designated as point A, and in the sectional plane, a second transition between the at least one first region and the at least one second region, situated closest to the longitudinal axis in the sectional plane, being designated as point C, wherein the distance AC has an angle α to the longitudinal axis and α is greater than or equal to 45°.

A method for producing an electrode for a spark plug, the electrode having an electrode base body and a cylindrical wear part, the wear part having a longitudinal axis that extends from a first end face of the wear part facing the electrode base body to a second end face situated opposite this end face, the method comprising:

• radiating a weld beam for producing at least one fused region in the wear part in at an angle β to the longitudinal axis, the angle β being not smaller than 75°.