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US 12,459,042 B2Granted
High-speed spindle with forced mechanical vibratory assistance
AssigneeMitis
InventorSylvain Laporte
Life of this patent
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Abstract
A spindle for a machine tool, including a housing, a shaft for driving a cutting tool, rotatably mounted inside the housing with a possibility of axial movement relative to the housing, a single ball, axially interposed between a bearing ring fixed relative to the housing and a bearing ring movable with the shaft, one of these rolling rings defining an inclined bearing surface that is not perpendicular to the axis of rotation of the shaft, so that the rotation of the ball generates an axial oscillation of the shaft.
Claims17
A high-speed spindle for a machine tool, having
- a housing,
- a shaft for driving a cutting tool, mounted rotatably inside the housing so as to be able to move axially relative to the housing,
- a single ball, interposed axially between a rolling bearing outer ring that is fixed relative to the housing and a rolling bearing outer ring that is movable with the shaft, one of these rolling bearing outer rings defining an inclined rolling bearing surface that is not perpendicular to an axis of rotation of the shaft, such that the rotation of the ball brings about an axial oscillation of the shaft, the spindle being capable of operating at a rotational speed of the shaft greater than 10 000 rpm wherein the ball is partially fitted in a radially open annular groove formed in the shaft.
Dependencies are inferred from the claim text.