Patents Assigned to Voumard Machines Co.
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Patent number: 7448939Abstract: 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.Type: GrantFiled: March 10, 2006Date of Patent: November 11, 2008Assignee: Voumard Machines Co. SAInventor: Maurice Guenin
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Publication number: 20060217833Abstract: 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.Type: ApplicationFiled: March 10, 2006Publication date: September 28, 2006Applicant: Voumard Machines Co SAInventor: Maurice Guenin
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Patent number: 5630748Abstract: The apparatus, especially a grinding machine, comprises a frame (14) on which two working planes (A, B) are used, at least two oscillating elements (11, 12) disposed on one of the planes and each including at least one tool device (15, 16), at least one further tool device disposed on the other plane, and at least one means for generating oscillating motion (20) whereby a reciprocating movement can be generated at the level of each of the oscillating elements, so that the resultant of the vectors representing the dynamic forces associated with the movement of each of the oscillating elements is substantially equal to zero. There is then little or no induced vibration.Type: GrantFiled: August 1, 1994Date of Patent: May 20, 1997Assignee: Voumard Machines Co., S.A.Inventor: Maurice Guenin
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Patent number: 5497759Abstract: The single-motored apparatus includes a motor which rotatingly drives a main shaft and a correction shaft, the main shaft in turn rotatingly driving the diamond toolholder, a clutch for coupling and uncoupling the shafts, and a cam/feeler assembly for transforming the rotary movement of the correction shaft into longitudinal movement of the diamond toolholder. When the correction shaft and the main shaft connected by the clutch rotate simultaneously, the diamond toolholder executes solely an angular movement; when the two shafts are uncoupled and only one of the two shafts rotates, the diamond toolholder executes either solely a longitudinal movement or a longitudinal and angular movement at the same time.Type: GrantFiled: December 15, 1993Date of Patent: March 12, 1996Assignee: Voumard Machines Co. S.A.Inventor: Maurice Guenin
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Patent number: 5323572Abstract: A toolholder turret (3) is movable in the X and Z directions relative to a work table (2) so that each of the grinding tools (9a, 10a, 11a 12a) can be presented to machine a surface of a workpiece (6). A support (20) of a truing unit (4) bears a rotary body (22), one arm (23) of which is provided at the end with a follower, while two vertical arms are provided with diamonds. The exact positions of the truing tools relative to a reference, which may be constituted by the detecting surfaces of the follower, are detected by means of a further follower (18) integral with a further table (13). Measurements taken by displacement of the latter follower are stored in a memory. Other measurements relating to the actual sizes and shapes of the grinding tools are likewise taken through displacement of the further table so that these tools are sensed by the detecting surfaces of the first-mentioned follower.Type: GrantFiled: May 7, 1992Date of Patent: June 28, 1994Assignee: Voumard Machines Co. S.A.Inventor: Maurice Guenin
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Patent number: 5259156Abstract: An auxiliary device is disclosed for use with grinding machines to assist in clamping a workpiece and performing the grinding of an internal bore in the workpiece. The device has an exteriorily conical surface extending from an annular projection to one end of the device which inserts into the workpiece and the interior of the device also has a frusto-conical surface tapering outwardly to the opposite end.Type: GrantFiled: April 29, 1992Date of Patent: November 9, 1993Assignees: Engineers' Tool Manufacturing Company, Voumard Machines Co. S.A.Inventor: Mordechai Ronen
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Patent number: 4386483Abstract: Two grinding-wheel spindles bearing grinding wheels are mounted on a table which undergoes an angular displacement for simultaneously grinding convergent internal and external conical surfaces of a workpiece, on the one hand, and for truing the grinding wheels by means of truing tools, on the other hand. The truing tools are so positioned that the grinding faces of the wheels are trued in a manner whereby the workpiece surfaces are then automatically ground with extreme precision and the exact desired diameter of the circular edge formed at the junction of the convergent surfaces is obtained.Type: GrantFiled: February 18, 1981Date of Patent: June 7, 1983Assignee: Voumard Machines Co. S.A.Inventor: Alfred Schlaefli
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Patent number: 4161849Abstract: Apparatus for facilitating the loading and unloading of workpieces to be machined on a machine tool having a horizontal-axis headstock and at least one rotary or pendular arm designed to transport the workpieces, without changing their orientation, from a supply location to a machining station. The apparatus itself comprises a workpiece-holder pivoting about a vertical axis in synchronization with the movements of the rotary or pendular arm of the machine tool in such a way as to cause a workpiece support first to face toward the side of the machine tool manned by the operator, to facilitate loading of the workpiece, then to face in the direction of the longitudinal axis of the machine tool so that the workpiece may be correctly picked up by the rotary or pendular arm.Type: GrantFiled: December 21, 1977Date of Patent: July 24, 1979Assignee: Voumard Machines Co.Inventors: Hugues Voumard, Roger Sauvain