Workholding

A work holding device comprising a rotatable device for gripping a workpiece, detection means for determining the value of a force between said device and said workpiece and means responsive to said detection means for controlling the rotational speed of said gripping device depending upon the force detected by said detection means.

A work holding device comprising a rotatable chuck, at least one jaw in said chuck for gripping a workpiece, said at least one jaw being provided with a sensing device for sensing the value of the force between said at least one jaw and a workpiece engaged by said jaw, a stationary control device and transmission means comprising slip rings for transmitting electrical signals from said sensing device to said control device.

A work holding device comprising a rotatable chuck, at least one jaw in said chuck for gripping a workpiece, said at least one jaw being provided with a sensing device for sensing the value of the force between said at least one jaw and a workpiece engaged by said jaw, a stationary control device and transmission means comprising means for transmitting signal waves from said sensing device to said control device.

A work holding device comprising a chuck, means for rotating said chuck, said chuck having a plurality of jaws, each said jaw having a gripping face for engaging said workpiece, detection means for determining the value of a desired force between said gripping face and said workpiece, said detection means comprising a sensing device positioned in the region of said gripping face of at least one of said jaws to sense directly forces applied to said gripping face by said workpiece, a stationary control device and transmission means including at least one slip ring for transmitting electrical signals from said sensing device to said stationary control device.

A work holding device comprising a chuck, means for rotating said chuck, said chuck having a plurality of jaws, each said jaw having a gripping face for engaging said workpiece, detection means for determining the value of a desired force between said gripping face and said workpiece, said detection means comprising a sensing device positioned in the region of said gripping face of at least one of said jaws to sense directly forces applied to said gripping face by said workpiece, a stationary control device and transmission means for transmitting signal waves from said sensing device to said control device.

A work holding device comprising a chuck for gripping a workpiece, means for rotating said chuck, said chuck having at least one gripping face for engaging said workpiece, detection means for determining the value of a desired force between said gripping face and said workpiece, said detection means comprising a sensing device positioned in the region of said gripping face to sense directly forces applied to said gripping face by said workpiece and means to control the rotational speed of said chuck depending upon the value of said desired force detected by said detection means.

A work holding device comprising a rotatable chuck for gripping a workpiece, means for rotating said chuck, said chuck having at least one gripping face for engaging said workpiece, detection means for determining the value of a desired force between said gripping face and said workpiece, said detection means comprising a sensing device positioned in the region of said gripping face to sense directly forces applied to said gripping face by said workpiece, and control means adapted to be actuated in dependence upon variations in the detected force brought about by variations in the rotational speed of the chuck.