Method for profiling a flat key, and flat key produced according to the method
AssigneeC. Ed. Schulte Gesellschaft mit beschrankter Haftung Zylinderschlossfabrik
InventorsMichael REINE, Thomas WALLBERG
Life of this patent
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Abstract
A method for profiling the broad sides of a flat key, a key blank being clamped in a clamping device so that the broad side of the key blank is exposed. Guide grooves and variation grooves which are complementary to the longitudinal sectional profile of the cutter teeth are milled into the broad side by advance in the longitudinal direction of the key, in one work operation, using a milling cutter that has cutter teeth on its peripheral surface and rotates about a cutter shaft. To produce undercut grooves, the axis of the cutter shaft is inclined at an angle of inclination relative to the longitudinal center plane of the key, ribs of the cutter teeth producing an undercut guide wall using at least one rib.
Claims15
A method for profiling at least one broad side of a flat key, comprising the steps of:
- clamping a key blank in a clamping device so that the broad side of the key blank is exposed;
- milling guide grooves and variation grooves which are complementary to a longitudinal sectional profile of the cutter teeth into the broad side by advancing in a longitudinal direction of the key, in one work operation, using a milling cutter that has cutter teeth on its peripheral surface and rotates about a cutter shaft;
- and producing an undercut guide wall using at least one rib by inclining an axis of the cutter shaft is inclined at an angle of inclination relative to a longitudinal center plane of key ribs of the cutter teeth.
A flat key, wherein all grooves associated with a broad side of the key respectively, have first groove walls associated with a first narrow side of the key, respectively, the first groove walls having a first flank angle relative to a center plane of the key, and have second groove walls which are associated with a second narrow side of the key, respectively, the second groove walls having a second flank angle relative to the center plane of the key, at least one first flank angle of one, broad side being less than 90°, the first flank angle being in a range of a specified angle of inclination of φ and φ+90°, and the second flank angle being in a range of the angle of inclination of φ+90° and 180°, the angle of inclination being between 0° and 90°, wherein all groove walls extending in a region of coding indentations on a front face of the key have flank angles, respectively, which are greater than 90°.
Dependencies are inferred from the claim text.