Method and device for grinding concave parts, notably for manufacturing prostheses
AssigneeVoumard Machines Co. S.A.
InventorMaurice Guenin
Life of this patent
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Abstract
Method for manufacturing cervical prostheses with a concavity after grinding, having the following steps: positioning a grinding tool (2) in a resting position (X0, Z0), loading the part (1) to grind, displacing the grinding tool (2) relative to the part (1) to grind along an axis (Z) parallel to the tool's rotation axis, displacing the grinding tool (2) relative to the part (1) to grind along an axis (X) perpendicular to the tool's rotation axis, so as to bring the tool in grinding start position, grinding the concavity (100) by combining rotation movements of the grinding tool and rotation movements of the part (1) around the two axes (Z, C) parallel to each other.
Claims24
A method for grinding elongated concavities previously roughed out in one side of a part, for example a prosthesis, said concavity having a section perceptibly in the shape of a portion of circle in a plane perpendicular to the rotation axis of a grinding tool, wherein the method includes the following steps:
- positioning the grinding tool in a resting position,
- loading the part to grind,
- displacing the grinding tool relative to the part to grind along an axis parallel to the tool's said rotation axis,
- displacing the grinding tool relative to the part to grind along an axis perpendicular to the tool's rotation axis, so as to bring the tool in grinding start position,
- grinding the concavity by combining rotation movements of the grinding tool and rotation movements of the part around the two axes parallel to each other.
Prosthesis having a concavity with a section perceptibly in an oval or elliptical portion in a first plane and perceptibly in a circular portion in a second plane perpendicular to said first plane, said concavity having a surface after grinding.
Dependencies are inferred from the claim text.