A machine tool comprises a tool carrier, e.g. in the form of a turret disc (7) that is provided with receptacles (8) for tool holders (9), wherein each tool holder and tool carrier comprise support surfaces associated to each other and devices for fixing the tool holder at the tool carrier. At least one clamping element is provided at the tool carrier (7) that is adjustably supported between a clamping position and a release position in a direction transverse to a tie rod of a tool holder arranged on a slider (22) receptacle of the tool carrier. The clamping element is provided with a first clamping surface (24) that can be brought into engagement with a second clamping surface (35) at the tie rod of the tool holder in a self-locking and releasable manner.

A method and a device for machining a workpiece rotating about a rotational axis. The machining point moves along the cutting edge of a cutting edge plane and the surface to be machined in a rolling movement on an advancement plane not intersected by the rotational axis. A pivot drive implements a large enough pivot angle so that a first workpiece surface is machined by a machining point moving along the first cutting edge in a first machining step. In a second machining step, a second workpiece surface is machined, wherein the machining point moves along the second cutting edge and the second workpiece surface. The cutting edge has a curvature radius smaller than the distance from the pivot axis of the holder to the cutting edge. The holder can additionally be displaced on the advancement plane with a movement component in a direction transverse to the rotational axis.

The tool according to the invention comprises a tool body and a cassette for machining a roller. At least one machining device can be fastened, in particular detachably, onto and/or in the cassette. In particular, the machining device is a cutting device, preferably for grooving a roller. The tool has a positioning device for orienting the cassette in the tool body at a predetermined position.

A machining tool for cutting a work component includes a cutting tool insert having a cutting surface along a portion of an external surface that defines a circumference of the cutting tool insert. A plurality of cartridges are insertable into the machining tool, each having an insert pocket for receiving the cutting tool insert. The cutting tool insert is rotatable between first, second and third fixed positions in each insert pocket of the plurality of cartridges, a first portion of the cutting surface exposed when the cutting tool insert is in the first fixed position, a second portion of the cutting surface exposed when the cutting tool insert is in the second fixed position, and a third portion of the cutting surface exposed when the cutting tool insert is in the third fixed position. The insert pocket of each of the plurality of cartridges is offset from each other.

The invention discloses a wheel machining tool. A rough turning tool and a finish turning tool are respectively arranged on two sides of a tool head, the primary declination angle of the rough turning tool is set to 90 to 120, and the primary declination angle of the finish turning tool is set to 85 to 95; the axial height difference between the rough turning tool and the finish turning tool is set to 0.2-0.5 mm; the distance c between the rough turning tool and the tool head is set to 5-8 mm, and the distance b between the finish turning tool and the tool head is set to 3-5 mm. The rake angle of the rough turning tool is set to 12-15, the rake angle of the finish turning tool is set to 14-17.

A machining tool for cutting a work component includes a cutting tool insert having a cutting surface along a portion of an external surface that defines a circumference of the cutting tool insert. A plurality of cartridges are insertable into the machining tool, each having an insert pocket for receiving the cutting tool insert. The cutting tool insert is rotatable between first, second and third fixed positions in each insert pocket of the plurality of cartridges, a first portion of the cutting surface exposed when the cutting tool insert is in the first fixed position, a second portion of the cutting surface exposed when the cutting tool insert is in the second fixed position, and a third portion of the cutting surface exposed when the cutting tool insert is in the third fixed position. The insert pocket of each of the plurality of cartridges is offset from each other.

A tool rest has a base, a tool holder rotatably supported on the base, and rotatably holding a tool, a rotational mechanism rotating the tool holder, a plurality of flexible linear members in which one ends of the plurality of linear members are connected with the tool holder and a winding device connected with the other ends of the plurality of linear members, and winding up the plurality of linear members by rotating when the tool holder is rotated by the rotational mechanism.

A tool rest has a base, a tool holder rotatably supported on the base, and rotatably holding a tool, a rotational mechanism rotating the tool holder, a plurality of flexible linear members in which one ends of the plurality of linear members are connected with the tool holder and a winding device connected with the other ends of the plurality of linear members, and winding up the plurality of linear members by rotating when the tool holder is rotated by the rotational mechanism.

A machine tool includes: a turret configured to hold a tool through a clamp mechanism; a workpiece main spindle device configured to rotatably hold a workpiece; a switching unit configured to change a clamp state of the clamp mechanism by using rotation torque of the workpiece main spindle device; and an in-machine robot configured to move the switching unit. The clamp mechanism includes a torque input hole to which rotation torque is applied to change the clamp state. The switching unit includes an input shaft coupled with the workpiece main spindle device, an output shaft coupled with the torque input hole of the clamp mechanism and configured to output torque to the torque input hole, and a transmission mechanism configured to transfer, to the output shaft, the rotation torque of the workpiece main spindle device input through the input shaft.

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.