Calibration head for the drilling of shafts
AssigneeSnecma
InventorsClaude Gérard René Dejaune, Gérard Lehoux
Life of this patent
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Abstract
A cylindrical calibration head for the drilling of a shaft, includes three flutes arranged evenly around the circumference so that they are spaced one from the next by an angle of 120° with respect to a rotation with respect to the axis of the calibration head, the flutes allowing for the removal of chips and the passage of lubricant during drilling, each of the flutes including a machining insert of which the position in the flute can be adjusted using an adjusting cartridge.
Claims13
A cylindrical calibration head for drilling a shaft comprising:
- three flutes extending along an axis of said cylindrical calibration head and uniformly distributed around a circumference of the cylindrical calibration head so that the three flutes are separated from each other by an angle of 120° in rotation about the axis of the cylindrical calibration head, the flutes being arranged for evacuation of chips and passage of a lubrication during drilling, each of the flutes comprising a machining insert, a position of which is adjusted in the flute by an adjustment cartridge;
- at least one front guide pad arranged on an outside surface of the cylindrical calibration head in a first zone corresponding to a front end of the head, and
- at least one back guide pad placed on the outside surface of said cylindrical calibration head in a second zone defining a back zone of said cylindrical calibration head, the at least one back guide pad being placed behind the at least one front guide pad, along a same axis as the at least one front guide pad.
The cylindrical calibration head for drilling a shaft according to claim 8, wherein one of the two back guide pads that are positioned symmetrically relative to the axis of the cylindrical calibration head, is placed at 30° from the rough machining insert or a finishing insert.
Dependencies are inferred from the claim text.