This invention provides a machine tool capable of easily and quickly attaching/detaching a tool holder while reliably holding the tool holder, including at least two clamp holes (211) that receive pins (203) extending through at least two through holes (202) provided in a tool holder (134), at least two tubular clamp sleeves (302) fitted in the at least two clamp holes (211), respectively, and each including a flexible trunk portion (321), a fluid encapsulating chamber that encapsulates a fluid, a channel extended from the fluid encapsulating chamber to an outer peripheral surface of the flexible trunk portion, and a pressure adjusting portion that adjusts a pressure of the fluid in the fluid encapsulating chamber, wherein a clamp fastening force is made to act on the pins (203) in synchronism with an increase or a decrease in the fluid pressure in the fluid encapsulating chamber.

A lathe includes a spindle, a turret, a Z-axis feed mechanism moving the spindle and the turret relative to each other in a Z-axis direction along a center axis of the spindle, an X-axis feed mechanism moving the spindle and the turret relative to each other in an X-axis direction orthogonal to the Z-axis direction, and a plurality of tool holders each having a tool holding part holding a tool, and attached to the turret. The tool holding part of at least one of the tool holders holds the tool at a holding position thereon set at a position such that, when the held tool is indexed to a machining position by rotation of the turret, a cutting-edge reference point of the held tool is offset to one side with respect to an X-Z plane including a center axis of the turret.

A simple machine tool including a relatively simple shaped turret having as many tool attachment parts as possible even when a cutout part for a movement path for a main spindle is provided. A machine tool includes a first main spindle, a second main spindle, a first turret having tool attachment parts, a second turret having tool attachment parts, and a controller having an indexing device. An edge of a cutout part formed in the second turret is a straight line in a direction crossing each side of a regular dodecagon centered at a turning center of the second turret, as seen in a Z axis direction, and each tool attachment part is disposed according to each side left in the regular dodecagon cut off by the cutout part.

The present invention relates to a machine tool including a ram spindle and a tool holder, and provides a machine tool comprising: a tool holder including at least two inserts; and a ram spindle capable of fixing the tool holder in a clamped state or rotating the tool holder in order to change the position of the insert, such that the position of the insert can be quickly changed, thereby enabling an improvement in productivity and precision and a reduction in product costs.

This invention provides a machine tool capable of easily and quickly attaching/detaching a tool holder while reliably holding the tool holder, including at least two clamp holes (211) that receive pins (203) extending through at least two through holes (202) provided in a tool holder (134), at least two tubular clamp sleeves (302) fitted in the at least two clamp holes (211), respectively, and each including a flexible trunk portion (321), a fluid encapsulating chamber that encapsulates a fluid, a channel extended from the fluid encapsulating chamber to an outer peripheral surface of the flexible trunk portion, and a pressure adjusting portion that adjusts a pressure of the fluid in the fluid encapsulating chamber, wherein a clamp fastening force is made to act on the pins (203) in synchronism with an increase or a decrease in the fluid pressure in the fluid encapsulating chamber.

An outer cylinder unit (20) of a turret device (1) has a cylindrical housing space (24) in a front side thereof and has a coolant discharge flow path (22) opened as a connection port (22a) in an inner peripheral surface (24a) of the housing space (24), and the connection port (22a) is formed at a predetermined pitch interval in a circumferential direction. A coolant supply mechanism (25) arranged on an end of a shaft unit (10) is disposed in the housing space (24) and an opening of the outer cylinder unit (20) is closed by a lid (39). The coolant supply mechanism (25) includes a reciprocating rod (30) advancing and retracting with respect to the inner peripheral surface (24a) of the housing space (24) and a shaft receiving unit (26) supporting the reciprocating rod (30). The reciprocating rod (30) has a supply hole (34, 53) opened in a distal end thereof and has an annular elastic body (50) arranged to surround the opening of the supply hole (34, 53). When the reciprocating rod (30) advances, the elastic body (50) comes into contact with the inner peripheral surface (24a) of the housing space (24) to surround the connection port (22a) in the inner peripheral surface (24a).

A vertical lathe, including: a headstock provided on the upper side of a base so as to be capable of moving in the lateral direction and the vertical direction; a main spindle rotatably supported by the headstock; a workpiece chuck provided at the lower end section of the main spindle; a turret support stand provided so as to be capable of moving in the longitudinal direction orthogonal to the lateral direction and the vertical direction; an actuator for moving the turret support stand in the longitudinal direction; a turret having tool mounting parts provided at a plurality of circumferential positions, the turret being supported by the turret support stand so as to enable turn-indexing about the axis in the longitudinal direction; and a plurality of processing tools attached at each of the tool mounting parts so as to be set apart from each other in the longitudinal direction.

A tool turret includes a turret body having at least one connecting slot for replaceably mounting a tool holder to the turret and a transmission shaft arranged at the connecting slot. The transmission shaft is configured to transmit a drive torque to the mounted tool holder, and includes a torque receiving-side section for receiving driving torque and a connecting-side section for connecting to the mounted tool holder. The connecting-side section has a first gearing for transmitting the drive torque to a corresponding tool holder gearing, wherein at the torque receiving-side section a contacting part is provided for receiving the torque of the drive unit. A mating surface is provided at the connecting-side section of the transmission shaft and is arranged to contact a surface of the mounted tool holder for interacting with the tool holder to remove a gap between the first gearing and the corresponding mounted tool holder gearing.

A tool-changing carrier, that is to say a tool turret (1) with a rotary turret unit having at least two tool mounts (9) and arranged such that it can be rotated relative to a basic turret body (12), has radiation-transmission means which are provided for passing electromagnetic radiation through the tool-changing carrier or along the same. A tool system comprises such a tool-changing carrier and at least two tool heads (3, 5, 15, 17, 18, 27, 34, 40, 43), intended for fixing on the tool mounts (9), wherein at least one tool head is an optical tool head (3, 15, 17, 18) which is suitable for exposing a workpiece (11) to electromagnetic radiation and has a tool optics unit (23) for deflecting and/or forming the electromagnetic radiation.

A hydraulic fluid actuated lathe tool mounting expander assembly incorporating a block having a base, an inner end, an outer end, a compression end, and a compression face; a first cylindrical void extending into the block, the first cylindrical void having a floor and opening at the block's compression face; a second cylindrical void extending into the block, the second cylindrical void having a floor and opening at the block's outer end; first and second pistons respectively slidably mounted within the first and second cylindrical voids; a conduit extending between the first and second cylindrical voids, the conduit being adapted for conveying the hydraulic fluid from the second cylindrical void to the first cylindrical void; and a jack screw actuator connected operatively to the block for driving the second piston against the hydraulic fluid for upwardly driving the first piston.