B - Operations – Transporting – 23 – C
Patent
B - Operations, Transporting
23
C
B23C 3/35 (2006.01)
Patent
CA 2739792
The invention relates to a method for profiling the broad sides (3, 3') of a flat reversible key. A key blank (1) is clamped in a clamping device in such a way that the first broad side (3) of the key blank is exposed, and complementary grooves (4, 5, 6, 12) and ribs (8, 9, 11) are milled using a milling cutter (17) that has cutter teeth (16) on its peripheral surface and rotates about a cutter shaft (19), by advance in the longitudinal direction of the key with respect to the longitudinal section profile of the cutter teeth (16). The key blank (1) is then clamped in a position which is turned by 180° about the longitudinal center axis (10) of the key in such a way that the second broad side (3') of the key blank is exposed, and complementary grooves (4, 5, 6, 12) and ribs (8, 9, 11) are milled into the broad side (3'), using the same milling cutter (17), by advance in the longitudinal direction of the key with respect to the longitudinal section profile of the cutter teeth (16). The axis of the cutter shaft is inclined at an angle of inclination (.phi.) relative to the longitudinal center plane (2) of the key (1), at least one cutter tooth rib of the cutter teeth (16) producing an undercut guide wall (4').
Piotrowski Theo
Reine Michael
Wallberg Thomas
Blake Cassels & Graydon Llp
C. Ed. Schulte Gesellschaft Mit Beschraenkter Haftung Zylindersc
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