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US 10,722,958 B2Granted
Punching device, punch and method
AssigneeActivos Industriales Madama, S.L.
InventorsAlberto José Herrero, Mikel Pardavila
Life of this patent
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Abstract
A punching device for punching a workpiece includes a punching part and a broaching part. The punching part has a punching cutting edge that limits a punching cutting area, the punching part being intended to pierce the workpiece. The broaching part is intended to tear the workpiece later than the punching part, and includes at least a broaching tooth with a cutting edge that limits a cutting area which is greater than the punching cutting area.
Claims13
A punching device, for punching a workpiece, the punching device comprising:
- a punching part including a punching cutting edge that limits a punching cutting area, the punching part being intended to pierce the workpiece;
- and
- a broaching part intended to tear the workpiece later than the punching part, the broaching part comprising a first broaching tooth and a second broaching tooth, the first broaching tooth comprising a first broaching cutting edge limiting a first broaching cutting area, and the second broaching tooth comprising a second broaching cutting edge limiting a second broaching cutting area, the first broaching cutting area covering the punching cutting area except for at least one first gap, the second broaching cutting area covering the at least one first gap;
- wherein the first broaching cutting area and the second broaching cutting area define a total broaching cutting area which is greater than the punching cutting area, and wherein the punching cutting edge is circular and comprises a punching radius, the first broaching cutting edge comprises first broaching circle arcs with a first broaching radius of curvature and the second broaching cutting edge comprises second broaching circle arcs with a second broaching radius of curvature which is the same as the first broaching radius of curvature and greater than the punching radius, and wherein the first broaching circle arcs and the second broaching circle arcs have the same center.
1 more element
A punch comprising
- a punching part comprising a punching cutting edge that limits a punching cutting area, the punching part being intended to pierce the workpiece;
- and
- a broaching part attached to the punching part and intended to tear the workpiece later than the punching part, the broaching part comprising a first broaching tooth and a second broaching tooth, the first broaching tooth comprising a first broaching cutting edge limiting a first broaching cutting area, and the second broaching tooth comprising a second broaching cutting edge limiting a second broaching cutting area, the first broaching cutting area covering the punching cutting area except for at least one first gap, the second broaching cutting area covering the at least one first gap;
- wherein the first broaching cutting area and the second broaching cutting area define a total broaching cutting area which is greater than the punching cutting area, and wherein the punching cutting edge is circular and comprises a punching radius, the first broaching cutting edge comprises first broaching circle arcs with a first broaching radius of curvature and the second broaching cutting edge comprises second broaching circle arcs with a second broaching radius of curvature which is the same as the first broaching radius of curvature and greater than the punching radius, and wherein the first broaching circle arcs and the second broaching circle arcs have the same center.
1 more element
Dependencies are inferred from the claim text.