A machine tool includes a rotation table unit (25) including a rotation table (39) configured to rotate with respect to a first axis. The rotation table unit (25) is configured to move along a second axis that is orthogonal to the first axis. The machine tool includes a spindle unit (26) including a spindle (58) configured to rotate with respect to a third axis that is orthogonal to the first axis and the second axis. The spindle unit (26) is configured to move along the third axis. The machine tool includes a bed (22) that supports the rotation table unit (25) and the spindle unit (26). A front part of an upper surface of the bed (22) includes a recess (232) in which the rotation table unit (25) is arranged. The spindle unit (26) is located at a rear part of the upper surface of the bed (22).

A tool changing device for a machine tool comprises a tool magazine, a transfer device and a linear drive for the tool magazine. The tool magazine comprises a magazine axis, wherein the tool magazine is rotatable about the magazine axis by a rotary drive, and a plurality of holding locations for tools that have a support shaft and a receiving groove. At least some of the holding locations are arranged offset relative to one another along the magazine axis, and at least some of the holding locations are arranged offset relative to one another about the magazine axis. The holding locations are configured to hold the tools at the receiving groove. The transfer device comprises a transfer carriage, wherein the transfer device is movable between a first transfer position in relation to the tool magazine and a second transfer position to transfer tools between the tool magazine and a tool holder of the machine tool. The linear drive is configured to move the tool magazine along the magazine axis relative to the transfer device to provide, together with the rotary drive, a selected holding location in the first transfer position.

A device (1) for the movement of sheet-like pieces (P) in a machine tool (M), including a frame (10) moving towards or away from the machining surface (P1) of the machine, a gripping device (20) including a sheet-like element (21) with a gripping surface (21a) having openings (24) and mounted on the frame (10) rotatingly around at least one axis (x) substantially orthogonal to the direction of movement (D) of the frame (10) and element for the creation of a vacuum (25) communicating with the openings (24) and adapted to generate a vacuum pressure at the openings (24), which, when the gripping surface (21a) is substantially next to the machining surface (P1), makes it possible to detach the pieces (P) from the machining surface and keep them on the gripping surface.

The machine tool (10) has an asymmetrically constructed workpiece positioning device (16) which runs on three guide rails (17, 18, 19). It comprises two carriages (20, 45) which are connected together by a workpiece carrier (31) that is mounted so as to be rotatable about the A axis. While the first carriage (20) serves for the longitudinal and rotary positioning of the workpiece carrier (31), the second carriage (45) is provided merely for supplementary weight support. This results in a mechanically slimline, low-weight structure with high positioning accuracy. High dynamic loadability and thus a high machining rate and particularly high vibration resistance is allowed.

A tool magazine receives a plurality of tools which are provided for arrangement on a tool spindle of a machine tool, and a method for changing tools using a tool magazine. The tool magazine exhibits a guide rail arranged in a fixed position on a machine base, a magazine carriage displaceably mounted on the guide rail, a rotary drive arranged on the magazine carriage and having a magazine shaft which can be rotated around a shaft axis of rotation, at least two magazine wheels arranged non-rotatably on the magazine shaft and having a plurality of tool holders, and a transfer device linearly displaceable along a transfer axis transverse to the guide rail and which picks up a tool arranged on one of the tool holders of the magazine wheels and transports the tool to the tool spindle and back.

The machine tool has a machine bed having a first horizontal linear guide and a second horizontal linear guide arranged at right angles to the first linear guide. On the first linear guide is arranged, in an axially displaceable manner, a workpiece clamping fixture, which is swivelable about a swivel axis oriented parallel to the second linear guide and is rotatable about a rotation axis oriented at right angles to the swivel axis. On the second linear guide a toque motor driven swivel arm is axially displaceable, the swivel axis of which is arranged parallel to the first linear guide and which on its free end bears a tool spindle, the axis of which is oriented parallel to the first linear guide.

A machine tool includes a spindle, a spindle X-axis moving mechanism for moving the spindle in an X-axis direction, a tool rest equipped with a cutting tool for machining a workpiece, and a tool rest X-axis moving mechanism for moving the tool rest in the X-axis direction, wherein the tool rest is provided with a swivel mechanism for causing swiveling the cutting tool. The machine tool further includes a calculating means for calculating a moving distance of the cutting tool in the X-axis direction when the cutting tool has swiveled by a desired swivel angle, and a control means for controlling the operation of the spindle X-axis moving mechanism such that the spindle is moved in the X-axis direction to follow the cutting tool in accordance with the moving distance.

A tool magazine receives a plurality of tools which are provided for arrangement on a tool spindle of a machine tool, and a method for changing tools using a tool magazine. The tool magazine exhibits a guide rail arranged in a fixed position on a machine base, a magazine carriage displaceably mounted on the guide rail, a rotary drive arranged on the magazine carriage and having a magazine shaft which can be rotated around a shaft axis of rotation, at least two magazine wheels arranged non-rotatably on the magazine shaft and having a plurality of tool holders, and a transfer device linearly displaceable along a transfer axis transverse to the guide rail and which picks up a tool arranged on one of the tool holders of the magazine wheels and transports the tool to the tool spindle and back.

A workpiece lifting and lowering device is provided with: a workpiece base supported as to be capable of being lifted and lowered, and mounting a workpiece; a link mechanism connected to the workpiece base, and lifting and lowering the workpiece base by converting a rotation motion to a lifting and lowering motion; and a driving mechanism rotationally driving the link mechanism through a transmission member.

A rim drilling and milling machine has a base (10), a column (20), a turret (30), a saddle (40), a table (50), and a fixture unit (60). The fixture unit (60) has a foundation (61) and four clamping seats defined as two first clamping seats (63A) and two second clamping seats (63B). The first clamping seats (63A) are slidably mounted on the foundation (61) along a first radial direction, and are disposed at positions diametrically opposite in the first radial direction. The second clamping seats (63B) are slidably mounted on the foundation (61) along a second radial direction perpendicular to the first radial direction, and are disposed at positions diametrically opposite in the second radial direction. The four clamping seats can clamp at four equiangular points of a wheel rim.