Method for producing a magnetic core for an electromagnetic actuator
AssigneeFederal-Mogul Valvetrain GmbH
InventorsJohannes Knust, Olaf Josef, Guido Bayard
Life of this patent
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Abstract
A method for producing a magnetic core for an electromagnetic actuator of an electromagnetic valve train includes punching a core blank from a soft magnetic metal sheet and reshaping the core blank. The core blank has a base segment with an opening and a plurality of wall segments that extend outwardly from an outer edge of the base segment. The plurality of wall segments is bent in a direction substantially perpendicular to the base segment during the reshaping.
Claims12
A method for producing a magnetic core (1) for an electromagnetic actuator for an electromagnetic valve train, comprising the steps of:
- punching a core blank (2) from a soft magnetic metal sheet, the core blank (2) comprising:
- a base segment (4) having an opening (8);
- and
- a plurality of wall segments (6) extending outwardly from an outer edge of the base segment (4);
- reshaping the core blank (2) so that the plurality of wall segments (6) are bent in a direction substantially perpendicular to the base segment (4) and so that a distance between two respective wall segments (6) is in the range of between 0.05 mm and 0.3 mm after the reshaping;
- and
- affixing a tubular soft magnetic inner core (10) to the base segment (4), or affixing a cylindrical soft magnetic inner core (10) to the base segment (4), and introducing a through-hole extending perpendicular to the base segment (4) through the cylindrical soft magnetic inner core (10);
- and
- stamping the soft magnetic metal sheet before the step of punching, or stamping the core blank (2) after the step of punching.
Dependencies are inferred from the claim text.