Abstract: In order to improve a machine tool comprising a machine frame, at least one workpiece receiving means which can be rotated about an axis and fixed in a defined rotary position, a tool carrier arrangement, with a rotatingly driven tool which can be moved by means of a control and aligned such that the tool spindle axis is located in planes intersecting the axis and forming with this axis an angle in the range of approximately 0° to approximately 90°, in such a manner that the distances to be traveled can be reduced it is suggested that the tool carrier arrangement comprise a tool spindle carrier which can be pivoted about a pivot axis in relation to a bearing housing, can be fixed on the bearing housing in at least one machining position and extends only on one side of the pivot axis in an angular range of less than 180° around the pivot axis and away from it and that the tool spindle be arranged on the tool spindle carrier such that its tool spindle axis is in a position non-coaxial to the pivot a

Abstract: In order to improve a machine tool comprising a machine frame, a drum arranged for rotation about a drum axis within a maximum angular range in relation to the machine frame and having a plurality of machining devices held on it and drives rotatable with the drum and associated with the machining devices, a stationary control and supply device for the drives and a rotary supply unit which has line systems connected, on the one hand, to the rotatable drum as well as, on the other hand, held so as to be stationary in relation to the machine frame, these line systems being free from interruptions, deformable as a result of rotation of the drum and extending in the direction of the drum axis, in such a manner that the spatial requirements for the twistable line systems in the direction of the drum axis are as small as possible it is suggested that the line systems extend into a passage in the drum close to the drum axis.

Abstract: In a tool turret for a machine tool, in particular, a lathe, comprising a turret head rotatable about a turret indexing axis, the turret head tapering on either side of a diameter plane of the turret head extending perpendicularly to the turret indexing axis and having on each side of this diameter plane a circular ring-shaped row of tool stations which is concentric with the indexing axis, each of the tool stations having a tool receiving means for clamping a toolholder for a machining tool, in order to increase the machining operations which are performable with a tool turret and the machining accuracy, such a tool turret is so designed that: each tool station comprises a planar contact surface formed by the outer surfaces of the turret head for a toolholder; the contact surfaces of the two rows of tool stations define regular pyramids of identical shape which point away from one another and whose axes coincide with the turret indexing axis; each row of tool stations has at least one tool receiving means fo

Abstract: In order to improve a machine tool comprising a machine frame with an underframe and a machine column seated on this and having a support ring, a support mounted on the support ring for rotation about an essentially vertical axis, several workpiece receiving chucks for workpieces to be machined arranged on the support, an operating area extending around the vertical axis, and a plurality of stations arranged on the machine frame in the region of the operating area, the workpiece receiving chucks being positionable in these stations during a machining cycle, such that the machine frame has as great a rigidity as possible with as expedient a construction as possible it is suggested that the machine column have a reinforcement casing fixing the support ring in relation to the underframe, this casing extending outside the operating area and surrounding it at least partially, that the reinforcement casing comprise casing supporting structure elements which are located in a casing surface extending around the verti

Abstract: A workpiece spindle device for a machine tool having a drivable workpiece spindle in a spindle housing and including a hydraulic oil supply device with a non-rotating housing portion connected to the spindle housing. An oil control device is connected to the non-rotating housing and communicated to the oil supply device without an oil line therebetween. An oil flow path is provided between the oil control device and a cylinder chamber of a workpiece clamping cylinder of the spindle with the oil path being free of any valve and thus substantially unrestricted to oil flow.

Abstract: In order to improve a multiple-spindle turning machine comprising a machine frame, a spindle drum arranged to rotate relative to the machine frame around a drum axis having a number of work piece spindles movable in the direction of rotation, said work piece spindles being respectively provided with a work piece receiving means for a work piece, and a number of stations, comprising at least one machining station, arranged consecutively on the machine frame in the direction of rotation of the work pieces corresponding to the number of work piece spindles, in such a way that the number of tools which may be used can be increased at low expense, it is proposed that for machining the work pieces, the at least one machining station has a first and a second spindle position, which are arranged at an angular distance from one another relative to the drum axis; that the spindle drum is rotatable in such a manner that a work piece spindle with a work piece may be positioned in each of the spindle positions; and that e

Abstract: A work spindle for a machine tool. The work spindle has a spindle guard tube, a clamping arrangement, a clamping force generator, which is arranged on the spindle guard tube and operates the clamping arrangement, and which has at least one first cylinder chamber enclosed by a first cylinder housing and a first piston, in such a way that a large band width of different clamping forces may be generated simply. The clamping force generator has a second cylinder chamber enclosed by a second cylinder housing and a second piston. Additionally, for operation of the clamping arrangement, both cylinder chambers are always subjected to a pressurized medium. Furthermore, to generate different clamping forces, the clamping force generator is switchable over from a first working mode, in which at least the first piston operates the clamping arrangement, into a second working mode, in which at least the second piston operates the clamping arrangement.

Abstract: In order to improve a lathe, in particular, a multiple-spindle lathe, comprising at least one workpiece spindle arranged on a machine frame and rotatable about a spindle axis, this workpiece spindle projecting with its front end into an operating area, and a tool slide with a longitudinal slide element guided for displacement in Z-direction parallel to the spindle axis in a longitudinal guide means located outside the operating area and arranged on a slide stand of the machine frame and with a cross slide arranged in the operating area and displaceable in X-direction transversely to the spindle axis in relation to the longitudinal slide element, this cross slide being guided on a cross slide guide means arranged at a front end of the longitudinal slide element and movable by means of a cross feed gear, such that the tool slide as a whole is constructed in as space-saving a manner as possible and, in particular, requires little space in the operating area in order to create the possibility of using several too

Abstract: In order to improve a multiple-spindle turning machine, comprising a machine frame, a cylinder rotatable around an essentially horizontal rotational axis relative to the machine frame, work piece spindles arranged on the cylinder in respective individual positions with spindle axes, which are aligned essentially parallel to the rotational axis and which during the machining of a work piece are movable relative to the cylinder by means of linear drives in the direction of their spindle axis and independently of one another, and tools arranged on tool supports for machining the work pieces held in the work piece spindles, in such a way as to allow the respective work piece spindle to be positioned as precisely as possible in the direction of its spindle axis, it is proposed that each of the work piece spindles is allocated its own linear drive disposed on the cylinder to move it in the direction of the spindle axis, and that the work piece spindle is constantly coupled to the linear drive.

Abstract: In order to improve a machine tool comprising a machine frame, a drum arranged on the machine frame for rotation about a drum axis and having a plurality of machining devices for tools held on it and drives associated with the machining devices and rotatable with the drum, a stationary control and supply unit for the drives and a line system connected, on the one hand, to the drives rotatable with the drum and, on the other hand, to the control and supply unit, this line system being free from interruptions and rotary connections and deformable as a result of rotation of the spindle drum, such that the line system can be guided in as space-saving a manner as possible it is suggested that the line system have a long line system section extending along a system axis and rotatable about the system axis.

Abstract: A tool fixing device for machine tools has a tool holder with a tool holder body for bearing the tool, and a tool carrier with a tool station. The tool station has a support surface and a receiver for receiving a shaft from the tool holder. An aligning device operative between the tool holder body and the tool carrier is used to position the tool holder body relative to the tool carrier, such that the tool holders in the respective tool station of the tool carrier need not be readjusted each time they are inserted. The aligning device has two aligning elements, one on the tool carrier, and the other on the tool holder body. When the shaft from the tool holder is clamped in the receiver on the tool station, the aligning elements fix the tool carrier so as to be aligned in a single position using form-fitting elements which engage in one another without clearance.

Abstract: In order to improve a multiple-spindle turning machine comprising a machine frame, two cylinders arranged on opposite sides of an operating area and mounted on the machine frame to be respectively rotatable around an essentially horizontal rotational axis, machining means arranged on the cylinders in respective individual positions with central axes aligned essentially parallel to the rotational axis, and tools for machining work pieces held in at least one portion of the machining means, in such a way that it may also be used as universally as possible for other work pieces, it is proposed that the cylinders are rotatable around their rotational axis independently of one another relative to the machine frame.

Abstract: Tool turret device for machine tools, comprising a turret head bearing device, to which a turret head is attached for rotation about an indexing axis, a turret head indexing device as well as locking means for the turret head, the turret head indexing device having an indexing disk similar to a Maltese cross, which is rotatable about the indexing axis together with the turret head and has a slot open at its circumference for each tool station of the turret head, and a rotarily drivable driver with a driver finger for insertion into the indexing disk slots, wherein for shortening the indexing times and saving on separate locking means the driver has at least two driver fingers arranged at equal distances from the driver axis and the indexing disk slots are equipped at their free ends with arc-shaped curves widening the slot width outwardly in such a manner that angle of rotation regions, in which the driver secures the indexing disk against any rotation, adjoin an angle of rotation region of the driver, over w

Abstract: Process and apparatus for preventing collisions between two machine components, of which at least a first machine component is displaceable by means of a drive along a straight track relative to the second machine component such that the two components can collide, wherein for the simple and reliable prevention of such collisions a sequence of pulses is generated during movement of at least one of the two components relative to the other component by means of signal generating devices associated with the two machine components, namely such that the distance and/or the length and/or the height of consecutive pulses follows a function of the distance of the two components from one another, measured in track direction, and wherein the drive is controlled as a function of this sequence of pulses.

Abstract: A compact multiple-spindle machine tool has a spindle support which is rotatably mounted on a machine frame. Several work piece spindles are carried by the spindle support and may be positioned in various rotational positions when the spindle support is rotated about a rotational axis. A work piece is clamped to a spindle and can be machined by a tool in a work area. The machine frame has a bottom part which stands on a base. A stand extends upwards from the base to carry the spindle support. The work piece spindles are arranged in spindle positions around the stand. The working area for machining the work pieces which are held by the work piece spindles are also arranged around the stand.

Abstract: Motor spindle cooled by coolant for a machine tool comprising a workpiece spindle and a drive motor having a rotor surrounding the workpiece spindle, concentric with the workpiece spindle and connected to the workpiece spindle, and a stator surrounding the rotor and concentric with the rotor, and comprising a spindle housing accommodating the drive motor and coolant channels surrounding the stator, at least one inner coolant channel enclosing the stator at least to a major extent and at least one outer coolant channel similarly enclosing the stator at least to a major extent being provided--in section through the three-phase motor perpendicularly to the spindle axis--for decoupling the spindle housing thermally from the drive motor, the outer coolant channel lying--in relation to the spindle axis--outside the inner coolant channel in the radial direction, and a coolant inlet being connected to a first end of the outer coolant channel, the second end of the outer coolant channel to a first end of the inner coo

Abstract: Automatic apparatus for the feeding of bar-shaped stock to a machine tool, comprising an elongated receiving box which extends in feed direction, has a guide passage open at both ends for receiving a new stock bar and is formed by two receiving channels, an actuating device for the opening and closing of the receiving box as well as a pushing-in device for pushing a new stock bar in feed direction into the machine tool, wherein for simplifying the construction a clamping device is associated with the receiving box for securing a new stock bar in place in the receiving box and the latter is guided for displacement in feed direction and is displaceable back and forth in feed direction by the pushing-in device.

Abstract: Lathe with a workpiece spindle (28) defining a Z-axis as well as a tool carrier slide (56) bearing a tool carrier in the form of a tool turret (112) having a turret body and a turret head, the slide being displaceable in the direction of a first axis (X-axis) extending transversely to the Z-axis, whereby workpiece spindle and tool carrier slide are displaceable relative to one another in the direction of the Z-axis, the tool turret is pivotable about a second axis (Y-axis) likewise extending transversely to the Z-axis as well as transversely to the X-axis and the turret head is mounted on the turret body so as to be rotatable about an indexing axis extending transversely to the Y-axis, and with first tool receiving means on the turret head (114) as well as a second tool receiving means (142) mounted on the turret body (110).

Abstract: Tool turret for a machine tool, the turret head of which is designed to be equipped with drivable tools, wherein for shortening the times required for indexing the rotatable turret head a three-part HIRTH tooth system is used to lock the turret head and a coupling which is constructed such that it can be disengaged by rotation of the turret head is provided between a drive shaft of the tool turret and a tool spindle of a drivable tool.

Abstract: Lathe comprising at least a headstock, a slide bed and two tool carrier bed-side carriages guided for displacement on longitudinal sides of the slide bed in the direction of the Z-axis, in which the machining plane defined by the Z-axis and the X-axis of this lathe forms an angle with the horizontal, whereby in order to increase the space available for the bed-side carriages the longitudinal sides of the slide bed bearing the two bed-side carriages extend transversely to the machining plane and are arranged on sides of the slide bed facing away from one another.