Abstract: In order to configure a multi-spindle machine tool comprising a machine frame, a spindle drum arranged on the machine frame to be rotatable about a spindle drum axis and having a plurality of workpiece spindles, each of which is provided with a workpiece receptacle for a workpiece that is to be machined in a working area, a plurality of tool carriers arranged in the working area, in particular associated with individual spindle stations, and each having a tool holder receptacle into which a tool holder is insertable, as well as a machine control system for controlling the machine tool to be more efficient, it is proposed that a handling apparatus is arranged on the machine frame, that with the handling device, also controlled by the machine control system, at least one tool holder is insertable into at least one of the tool holder receptacles and/or removable therefrom.

Abstract: The invention relates to a multi-spindle lathe comprising a machine frame, a spindle drum mounted on the machine frame so as to be rotatable about a spindle drum axis, workpiece spindles each arranged in a spindle position on the spindle drum and each mounted to be rotatable relative to the spindle drum about a workpiece spindle axis, said workpiece spindles being positionable by rotating the spindle drum about the spindle drum axis into different spindle stations which are arranged statically relative to the machine frame, for machining workpieces arranged in said workpiece spindles, wherein associated with each workpiece spindle is a workpiece guide bushing for guidance of a material bar held in the workpiece spindle for long turning, said material bar being arranged movably relative to the respective workpiece spindle in a direction parallel to the workpiece spindle axis.

Abstract: A workpiece change for use in a machine tool that comprises a tool spindle for clamping tools for machining workpieces, comprises two wheels arranged parallel to one another and rotatable about an axis of rotation into at least two prominent angular positions. Two swivel tables for clamping workpieces are arranged between the wheels and are each mounted on the wheels to swivel about a swivel axis which runs parallel to the axis of rotation. In each prominent angular position, one of the swivel tables is located in its working position in which clamped workpieces can be machined with the tools. Both wheels are supported at their rim.

Abstract: In a machine tool having at least one tool spindle which is displaceable in relation to a device for holding workpieces in at least one of three spatial directions and in which the tools (W1-W7) for processing the workpieces can be chucked, there are provided a machine magazine (36) in which tools (W1-W7) provided for exchange in the tool spindle (23) are kept in store and a background magazine (31) in which tools (W1-W7) provided for exchange in the machine magazine (36) are kept in store. In the machine magazine (36), not more than four storage places (42, 43, 44, 45) for accommodating tools (W1-W7) are provided (FIG. 2).

Abstract: In a machine tool having at least one tool spindle which is displaceable in relation to a device for holding workpieces in at least one of three spatial directions and in which the tools (W1-W7) for processing the workpieces can be chucked, there are provided a machine magazine (36) in which tools (W1-W7) provided for exchange in the tool spindle (23) are kept in store and a background magazine (31) in which tools (W1-W7) provided for exchange in the machine magazine (36) are kept in store. In the machine magazine (36), not more than four storage places (42, 43, 44, 45) for accommodating tools (W1-W7) are provided (FIG. 2).

Abstract: A workpiece change for use in a machine tool that comprises a tool spindle for clamping tools for machining workpieces, comprises two wheels arranged parallel to one another and rotatable about an axis of rotation into at least two prominent angular positions. Two swivel tables for clamping workpieces are arranged between the wheels and are each mounted on the wheels to swivel about a swivel axis which runs parallel to the axis of rotation. In each prominent angular position, one of the swivel tables is located in its working position in which clamped workpieces can be machined with the tools. Both wheels are supported at their rim.

Abstract: A workpiece change for use in a machine tool that comprises a tool spindle for clamping tools for machining workpieces, comprises two wheels arranged parallel to one another and rotatable about an axis of rotation into at least two prominent angular positions. Two swivel tables for clamping workpieces are arranged between the wheels and are each mounted on the wheels to swivel about a swivel axis which runs parallel to the axis of rotation. In each prominent angular position, one of the swivel tables is located in its working position in which clamped workpieces can be machined with the tools. Both wheels are supported at their rim.

Abstract: A workpiece change for use in a machine tool that comprises a tool spindle for damping tools for machining workpieces, comprises two wheels arranged parallel to one another and rotatable about an axis of rotation into at least two prominent angular positions. Two swivel tables for clamping workpieces are arranged between the wheels and are each mounted on the wheels to swivel about a swivel axis which runs parallel to the axis of rotation. In each prominent angular position, one of the swivel tables is located in its working position in which clamped workpieces can be machined with the tools. Both wheels are supported at their rim.

Abstract: The present invention relates to a machine tool and a corresponding method for machining, in particular for turning and milling, a workpiece having a central bore, said machine tool including a tool holder for holding a tool, a work rest for seating the workpiece, a work mounting for holding the workpiece in place, and a drive mechanism for rotating the workpiece about a central rotation axis, wherein the work rest has an arbor for attaching the workpiece, such that a section of the arbor projects into the central bore on a first side of the workpiece, and wherein the work mounting has a counter-holder movable in the direction of the bore axis of the central bore for applying a contact pressure, acting in the direction of the bore axis, to the workpiece on a second side opposite the first side.

Abstract: The present invention relates to a machine tool and a corresponding method for machining, in particular for turning and milling, a workpiece having a central bore, said machine tool including a tool holder for holding a tool, a work rest for seating the workpiece, a work mounting for holding the workpiece in place, and a drive mechanism for rotating the workpiece about a central rotation axis, wherein the work rest has an arbor for attaching the workpiece, such that a section of the arbor projects into the central bore on a first side of the workpiece, and wherein the work mounting has a counter-holder movable in the direction of the bore axis of the central bore for applying a contact pressure, acting in the direction of the bore axis, to the workpiece on a second side opposite the first side.

Abstract: In a machine tool having at least one tool spindle which is displaceable in relation to a device for holding workpieces in at least one of three spatial directions and in which the tools (W1-W7) for processing the workpieces can be chucked, there are provided a machine magazine (36) in which tools (W1-W7) provided for exchange in the tool spindle (23) are kept in store and a background magazine (31) in which tools (W1-W7) provided for exchange in the machine magazine (36) are kept in store. In the machine magazine (36), not more than four storage places (42, 43, 44, 45) for accommodating tools (W1-W7) are provided (FIG. 2).

Abstract: In the case of a method for chip-removing machining of workpieces (14), in particular for making bores in workpieces (14), wherein a tool (18) is put into rotation (20) relative to the workpiece (14) and the tool (18) is moved relative to the workpiece (14) with a feed motion, the tool (18) executes an oscillating motion in the direction (z) of the feed motion relative to the workpiece (14), a settable oscillation component being imparted to the feed motion through control means.

Abstract: A machine tool (10) is equipped with a main spindle (24) movable via a machine control (26) and associated measuring systems (26a) relative to a workpiece holder (12) in a coordinate system (27) with a coordinate origin (28), and with a tool magazine (31) having storage spaces (30) for tools (25, 32, 33, 34). The main spindle (24) is moved into a tool change position in which a used tool (25) is exchanged for a new tool (32) to be used. A separate measuring system (43, 46) indicates whether the main spindle (24), in connection with the tool change, has assumed a measuring position (50) in which the position of the main spindle (24) relative to the coordinate origin (28) is determined via a machine control (26) and associated measuring systems (26a). This position is used in order to determine at least one correction value (?y, ?z).

Abstract: The present invention relates to a machine tool for machining of workpieces, having a workpiece support for mounting the workpiece, a tool holder, which can be moved at least along one axis, for holding a tool for machining the workpiece, and workpiece holding units for fixing the workpiece during the machining, the workpiece holding units being arranged outside the workpiece support surface of the workpiece support, which is covered by the workpiece in the mounted state, and each having a holding element for fixing the workpiece. In order that also workpieces of greater diameter can be machined, the machine tool otherwise being of the same dimensions, it is provided according to the invention that the holding elements can each be moved, substantially parallel to the workpiece support surface, in the direction of the workpiece, in particular in the direction of a central workpiece axis, which runs perpendicular to the workpiece support surface, for the purpose of centering and fixing the workpiece.

Abstract: A spindle unit has a working spindle, which is mounted, so as to be rotatable about its longitudinal axis, in its own bearing housing and in which there is provided a receiver for tools for machining workpieces. Via a repositioning unit, the working spindle is repositioned automatically and controllably in relation to the bearing housing when in operation (FIG. 1).

Abstract: The present invention relates to a machine tool for machining of workpieces, having a workpiece support for mounting the workpiece, a tool holder, which can be moved at least along one axis, for holding a tool for machining the workpiece, and workpiece holding units for fixing the workpiece during the machining, the workpiece holding units being arranged outside the workpiece support surface of the workpiece support, which is covered by the workpiece in the mounted state, and each having a holding element for fixing the workpiece. In order that also workpieces of greater diameter can be machined, the machine tool otherwise being of the same dimensions, it is provided according to the invention that the holding elements can each be moved, substantially parallel to the workpiece support surface, in the direction of the workpiece, in particular in the direction of a central workpiece axis, which runs perpendicular to the workpiece support surface, for the purpose of centering and fixing the workpiece.

Abstract: The present invention relates to a machine tool and a corresponding method for machining, in particular for turning and milling, a workpiece having a central bore, said machine tool comprising a tool holder for holding a tool, a work rest for seating the workpiece, a work mounting for holding the workpiece in place, and a drive means for rotating the workpiece about a central rotation axis, wherein the work rest has an arbor for attaching the workpiece, such that a section of the arbor projects into the central bore on a first side of the workpiece, and wherein the work mounting has a counter-holder movable in the direction of the bore axis of the central bore for applying a contact pressure, acting in the direction of the bore axis, to the workpiece on a second side opposite the first side.

Abstract: A machine tool has a work space (17) in which a device (15) for accommodating workpieces (16) to be machined is arranged. The machine tool further has a work spindle (18) for machining the workpieces (16) and a slide (34) which carries the work spindle (18) and is traversable in a longitudinal direction relative to the device (15), a respective cover (25), variable in length in the longitudinal direction (x), for the work space (17) being provided on the slide (34) on each of its sides, said cover (25) being connected with its respective first end to the slide (34) and with its respective second end to a side wall (21, 22; 51) of the work space (17). Each cover (25) variable in length has a respective rear wall (26) and a respective top (27), whereby the top (27) is connected to the rear wall (26) in a detachable, push-in, manner. A further flexible cover (31) is arranged in front of the slide (34) to protect the work space (17) at the bottom.

Abstract: In the case of a method for chip-removing machining of workpieces (14), in particular for making bores in workpieces (14), wherein a tool (18) is put into rotation (20) relative to the workpiece (14) and the tool (18) is moved relative to the workpiece (14) with a feed motion, the tool (18) executes an oscillating motion in the direction (z) of the feed motion relative to the workpiece (14), a settable oscillation component being imparted to the feed motion through control means (FIG. 1).

Abstract: A spindle unit has a working spindle, which is mounted, so as to be rotatable about its longitudinal axis, in its own bearing housing and in which there is provided a receiver for tools for machining workpieces. Via a repositioning unit, the working spindle is repositioned automatically and controllably in relation to the bearing housing when in operation (FIG. 1).