Abstract: The present invention describes an adaptive control system being preferably part of the portal, which provides a sophisticated method for a partial sequential and parallel invocation of portlets depending on the available resources and system utilization. Based on defined time mark for rendering content (maximum invocation time for displaying a portal page or a portal-wide portlets rending time mark), a number of available threads, and estimated invocation time for each portlet the inventive method determines and invokes a first group of portlets (80,90) providing the maximum number of portlets to be invoked sequentially without exceeding defined time mark for rending content, and then all remaining portlets (80,90) are to be invoked parallel to that first group of portlets. The invention guarantees reasonable response times and high scalability and performance. (FIG. 9).

Abstract: The present invention describes an adaptive control system being preferably part of the portal, which provides a sophisticated method for a partial sequential and parallel invocation of portlets depending on the available resources and system utilization. Based on defined time mark for rendering content (maximum invocation time for displaying a portal page or a portal-wide portlet rendering time mark), a number of available threads, and estimated invocation time for each portlet the inventive method determines and invokes a first group of portlets (80,90) providing the maximum number of portlets to be invoked sequentially without exceeding defined time mark for rendering content, and then all remaining portlets (80,90) are to be invoked parallel to that first group of portlets. The invention guarantees reasonable response times and high scalability and performance.

Abstract: A movable column is adjustable longitudinally and transversely in controlled fashion on a machine bed which defines a longitudinal direction and a transverse direction. A tool spindle is adjustable in controlled fashion on the movable column along a spindle axis normal to both the longitudinal direction and the transverse direction. A clamping axis is defined by a tool support which is rotationally adjustable in controlled fashion about this clamping axis and includes a clamping device through which a material rod can be pushed and in which it can be clamped. A front portion of the material rod, presenting the workpiece to be machined, is disposed within the working range of the tool spindle. A supply device is provided for pushing the material rod through the clamping device.

Abstract: A method for dynamically controlling the number of servers in a transaction system comprising at least one service unit for processing service requests is disclosed. Each service unit comprises a queue for receiving and queuing the incoming service requests and a plurality of servers for executing the service requests. The method comprises a first step of monitoring the current number of service requests and the current number of servers allocated to each one of the service units, a second step of determining an optimized number of servers for each one of the service units dependent on the current number of service requests and the current number of servers, and a third step of allocating the optimized number of servers for each one of the service units.

Abstract: A method for performing a tool change in a machine tool for machining workpieces, which is provided with a table for clamping workpieces, disposed on a machine frame, with a support on which one vertical or horizontal main spindle is disposed, and with a tool magazine, wherein the tool change is performed at a first peripheral location of the tool magazine which faces the main spindle which is movable in relation to the tool magazine.

Abstract: A drilling and milling machine comprises a travelling pillar (20) having a tool spindle (25) which is movable along its own spindle axis (Z) and along the two further axes (X, Y) of a three-dimensional coordinate system (X, Y, Z), and a workpiece carrier (30) which is stepwise rotatable about a pivot axis (A). The pivot axis (A) extends horizontally and at right-angles to the spindle axis (Z). The workpiece carrier (30) is constructed for clamping a material bar (18), the axis of which coincides with the pivot axis (A) and the end portion of which forms a workpiece (18') to be machined by the workpiece spindle (25). On the travelling pillar (20) a severing unit (26) is arranged which in each operating cycle severs a machined workpiece (18') from the workpiece bar (18). The resulting partition face can then be further machined by the drilling and milling machine.

Abstract: A boring, milling, thread cutting or analogous machine has a frame for a work supporting table and a first carriage which is reciprocable in the X-direction. The first carriage supports an open-and-shut magazine for a supply of spare tools as well as a second carriage which is movable in the Y-direction. The second carriage supports a headstock which is movable with a vertical tool spindle in the Z-direction. The magazine is opened in automatic response to movement of the second carriage in the Y direction and to a predetermined position in which the tool spindle can be relieved of the tool thereon by being lifted upwardly. An indexing mechanism of the magazine then places a selected tool into the path of downward movement of the spindle so that, when the spindle descends, the freshly selected tool is automatically coupled thereto. The second carriage is thereupon moved in the direction of the Y-axis to enable the magazine to become shut.

Abstract: A machine assembly comprises a machine tool including a machining table with a base table drivable in the Y-direction and a co-ordinating table movable under an NC-control system on the base table in the X-direction with a base table part secured to the co-ordinating table, and the work feed device including pallets movable from a base frame on to this base table part or the co-ordinating table under the positive direction of the controlled movement of the base table itself relatively to the co-ordinating table, thereby dispensing with a special device for operating a pallet change, wherein at least two pallets along with the base table part, form a machine surface.

Abstract: A machining center for at least one of a drilling or milling operation. The machining center includes a machine frame at which an outrigger is attached, with a tool spindle, driveable to execute stroke movements and rotary movements, being mounted to the outrigger. The tool spindle is adapted to be moved from an end position, in alignment with a tool carrier present in the tool magazine and connectible to the tool spindle, axially for being coupled to the tool carrier and then further movable axially for machining of workpieces. The tool spindle is rotatably mounted at a slide arranged at the outrigger and guided along a straight guide extending in parallel to an axis of rotation of the tool spindle. The slide serves for axial movement of the tool spindle for executing axial strokes intended for workpiece machining and for an exchange of a tool carrier. The slide has a zone through which the tool spindle extends, which zone may pass through a gap of the tool magazine.

Abstract: A mechine tool includes a movable work table assembled of a base part defining first clamping surface and of an exchangeable table part defining a second clamping surface levelled with the first one and being movable in guideways on the base part; a pallet changer having a rotary table provided with guideways aligned with the guideways on the work table unit supports pallets in the form of the exchangeable table part so that a workpiece can be clamped on one pallet while another workpiece on a second pallet is being operated in the machine.

Abstract: A machine tool has a table, a standard, a head part displaceable on the standard relative to the table, a main spindle arranged in the head part, an electric motor arranged in the head part for driving the main spindle in rotation, a tool changing arrangement arranged in the head part for aligning and coupling a tool with the main spindle, and a rotary element for displacing the head part relative to the table, which rotary element is arranged so that it is rotated by the electric motor and displaces, during the rotation, the head part relative to the table.

Abstract: The turret machine tool comprises a set of tool spindles which are driven via a built-in transmission gears by a direct current motor having a relatively stable torque in a wide range of rotational speeds such as a multiple direct current motor having permanent magnetic field and further including means for electrically controlling the speed of the motor according to a predetermined numerically controlled program.

Abstract: A tool changing arrangement for a machine tool comprises a rotary and axially movable drive spindle which coaxially carries a holding member rotatable therewith and movable in axial direction relative thereto. A tool carrier movable transversely to the holding member is provided at one end with a T-shaped slot into which a corresponding male portion on the holding member may be engaged, to couple the tool carrier to the holding member. The spindle and the tool carrier are provided at facing ends with interengaging centralizing portions which during axial movement of the holding member relative to the spindle axially align the tool carrier and the spindle.