An automatic lathe includes a main spindle that rotates a workpiece about a shaft center, a cutting tool that processes the workpiece, a feeder that moves the cutting tool, an input receiver that receives inputs regarding an eccentric distance and a radius, and a controller that controls the movement by the feeder such as to set a virtual circle having a radius of the distance, to set an offset virtual circle having a center at a position where a center of the virtual circle is offset from the shaft center of the workpiece in the radial direction of the workpiece by the radius, and to move the cutting tool along an circumference of the offset virtual circle in relation to a rotation of the workpiece by the main spindle. A hole is processed, which has the radius at a position away from the shaft center by the distance.

A boring tool has a slider member connected to a cutting insert seat, the slider member is arranged movably inside a tool body of the boring tool along a path extending transversely to a rotation axis of the boring tool for adjusting the distance of the of the cutting insert seat in relation to the rotation axis. A wedge-shaped clamping member is connected to a drive unit and arranged inside the tool body. The wedge-shaped clamping member is in contact with the slider member for clamping the slider member into a locked position, in which locked position, the wedge-shaped clamping member is pre-loaded to passively lock the slider member. The drive unit is controllable such that the wedge-shaped clamping member is actively releasable when adjusting the distance of the cutting insert seat.

A mechanism for the optimisation of a manual angular adjustment.

The object of this invention concerns an assembly including: A fixed mount (1); A part (2) having at least one approximately circular face mounted on the fixed mount (1) so that the part (2) is mounted so as to be mobile in rotation around an axis approximately centred on the circular

characterised in that the assembly also includes a device for the positional adjustment of the part in relation to the mount including at least: One first scale (4) in an area (5) linked to the fixed mount (1) positioned on at least one portion of the periphery of the mobile part (2), the first scale (4) being a measuring scale; One second scale (6) positioned on the circular face of the mobile part (2), the second scale (6) being a Vernier scale.

A mechanism for the optimisation of a manual angular adjustment.

The object of this invention concerns an assembly including: A fixed mount (1); A part (2) having at least one approximately circular face mounted on the fixed mount (1) so that the part (2) is mounted so as to be mobile in rotation around an axis approximately centred on the circular

characterised in that the assembly also includes a device for the positional adjustment of the part in relation to the mount including at least: One first scale (4) in an area (5) linked to the fixed mount (1) positioned on at least one portion of the periphery of the mobile part (2), the first scale (4) being a measuring scale; One second scale (6) positioned on the circular face of the mobile part (2), the second scale (6) being a Vernier scale.

A spindle apparatus according to the present disclosure includes a housing, a spindle rotatably installed in the housing, a tool releasably engaged with one end of the spindle and having an insert tip movable in a radial direction of the tool, a first draw-bar movably mounted in the spindle, and a second draw-bar movably mounted in the first draw-bar. The tool and one end of the first draw-bar are releasably engaged with the one end of the spindle by a movement of the first draw-bar, and the insert tip is configured to move in the radial direction by a movement of the second draw-bar.

The disclosure relates to a tool spindle with a spindle housing, a rotary drive, a tool receiving unit, wherein the tool receiving unit is arranged within the spindle housing and is movable with respect to the housing, which tool receiving unit can be used multi-functionally, and with which both conventional machining operations such as drilling and milling as well as turning and novel machining operations, such as cam turning, can be performed without damaging the spindle and with high industrial manufacturing quality.

The disclosure relates to a tool spindle with a spindle housing, a rotary drive, a tool receiving unit, wherein the tool receiving unit is arranged within the spindle housing and is movable with respect to the housing, which tool receiving unit can be used multi-functionally, and with which both conventional machining operations such as drilling and milling as well as turning and novel machining operations, such as cam turning, can be performed without damaging the spindle and with high industrial manufacturing quality.

A cutting head operated by a centrifugal force according to an embodiment of the present invention includes: an external housing that is rotatable; an internal housing installed within the external housing so as to be able to advance and retreat in a diameter direction, advanced toward a cut surface of a workpiece positioned outside the external housing by a centrifugal force according to rotation of the external housing, and retreated in a direction that becomes distant from the cut surface by an elastic member while the centrifugal force disappears; and a cutting tool unit provided in the internal housing and processing a groove in the cut surface while being advanced and retreated by a micro advance and retreat member.

A cutter assembly for a boring bar may include a cutter body, a cutter-element carrier, and an adjustment assembly having an adjustment element. The cutter-element carrier may be configured to be slidingly received in a channel in the cutter-body. The cutter-element carrier may have a first surface transverse to the first line. The adjustment element may have a second surface defining a position of the cutter-element carrier in the channel when the second surface is in contact with the first surface. The adjustment element may be movable along a second line transverse to the first surface for adjusting the position of the cutter-element carrier in the channel. The cutter body may include first and second recess portions. First and second insert portions may be inserted into the first and second recess portions, respectively, and may define float travel-limits for the cutter body.

A cutter assembly for a boring bar may include a cutter body, a cutter-element carrier, and an adjustment assembly having an adjustment element. The cutter-element carrier may be configured to be slidingly received in a channel in the cutter-body. The cutter-element carrier may have a first surface transverse to the first line. The adjustment element may have a second surface defining a position of the cutter-element carrier in the channel when the second surface is in contact with the first surface. The adjustment element may be movable along a second line transverse to the first surface for adjusting the position of the cutter-element carrier in the channel. The cutter body may include first and second recess portions. First and second insert portions may be inserted into the first and second recess portions, respectively, and may define float travel-limits for the cutter body.