Modular drill with double sided cam
AssigneeKennametal Inc.
InventorAlan J. Bookheimer
Life of this patent
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Abstract
A modular drill is disclosed. The modular drill includes a tool shank extending from a shank top end to a shank bottom end along a rotational axis and includes a cam slot extending at least partially through a width of the tool shank. The modular drill also includes a cutting head centered on the rotational axis including a cutting head top surface, a cutting head bottom surface, a draw pin extending from the cutting head bottom surface along the rotational axis, and a draw pin groove around at least a partial length of a circumference of the draw pin comprising a cam follower surface. The modular drill includes a double sided cam received within the cam slot of the tool shank and includes at least one cam surface contacting the cam follower surface.
Claims18
A modular drill comprising:
- a tool shank extending from a shank top end to a shank bottom end along a rotational axis and comprising a cam slot extending at least partially through a width of the tool shank;
- a cutting head centered on the rotational axis comprising:
- a cutting head top surface;
- a cutting head bottom surface;
- a draw pin extending from the cutting head bottom surface along the rotational axis;
- and
- a draw pin groove around at least a partial length of a circumference of the draw pin comprising a cam follower surface;
- and
- a double sided cam received within the cam slot of the tool shank, the double sided cam including a front portion and a rear portion and a connecting pin that connects the front portion and the rear portion,
- wherein the front portion and the rear portion include a conical cam surface contacting the cam follower surface, the conical cam surface having a vertex located on an axis parallel to and offset from a central axis of the cam slot.
A cutting head for a modular drill comprising:
- a cutting head top surface opposite a cutting head bottom surface centered along a rotational axis;
- a draw pin extending from the cutting head bottom surface along the rotational axis and structured and arranged to be releasably secured to a tool shank;
- and
- a draw pin groove extending around at least a partial length of a circumference of the draw pin comprising a cam follower surface wherein the cam follower surface is structured and arranged to engage a double sided cam;
- the double sided cam including a front portion including a conical cam surface and a rear portion including a conical cam surface and a connecting pin that connects the front portion and the rear portion, wherein the conical cam surfaces contact the cam follower surface.
A double sided cam for a modular drill comprising:
- a front portion extending along a central axis from a front portion top wall to a front portion bottom wall;
- and
- a rear portion opposite the front portion and separated from the front portion by a gap along the central axis, the rear portion extending along the central axis from a rear portion top wall to a rear portion bottom wall;
- wherein, the front portion bottom wall comprises a front portion conical cam surface extending from the front portion bottom wall toward the front portion top wall, wherein the front portion conical cam surface is structured and arranged to engage a cam follower surface of a cutting head;
- wherein the rear portion bottom wall comprises a rear portion conical cam surface extending from the rear portion bottom wall toward the rear portion top wall, wherein the rear portion conical cam surface is structured and arranged to engage the cam follower surface of the cutting head;
- and
- a connecting pin that connects the front portion and the rear portion.
Dependencies are inferred from the claim text.