Abstract: A control device for controlling a machine tool includes at least one memory for storing control data characterizing the instantaneous operating state of the machine tool during machining and a memory management device for managing the control data such that machining can be resumed after an interruption. The control data is separated into dynamic control data and static control data. The method for controlling a machine tool uses the control device and stores the static and dynamic control data in the memory. As a workpiece is machined, the instantaneous operating state of the machine tool is continuously stored so that machining can be resumed after an interruption.

Abstract: The invention pertains to a method and a device for controlling a machine tool, in particular an EDM machine, wherein the control data necessary for machining one or more workpieces is fed from the control device to the machine tool. Therein a list of action data for controlling special procedures (actions) and a list of event data for characterizing prescribed operating states (events), in particular, malfunctions, are permanently provided. The action and event data are linked in setting up the machine such that upon occurrence of one or more events, one or more actions are performed.

Abstract: A method and a device for controlling the entire machining operation of machine tools, in particular EDM machines, whereby the entire machining operation is broken down into individual machining objects, such as workpiece, work step etc., and the current machining status of the machining object is monitored before, during and/or after the entire machining operation and is displayed as needed.

Abstract: The apparatus (1) includes a wire-preparation (18) section upstream of the erosion point (3). Surface plating, especially with zinc, tin, and/or silver, and/or non-metal protective coating is removed from the wire while the wire is being prepared and especially while it is being cleaned and surface-treated. Substances, especially substances already present at the surface of the wire, are thermally diffused throughout that surface.

Abstract: An electric discharge machine is shown with a work piece (4) inside a hermetically closed container (13) having a dielectric capable of being supplied and removed in particular under pressure, the container (12) has at least two parts (6, 14a, 14b, 14c) capable of sliding on each other. In particular, the parts are designated as telescopically nestable rings (14). At least two parts are further interconnectable and detachable from each other by a quick acting system.

Abstract: Apparatus and cathode for and method of electro-erosive cutting. The cathode is in the form of a wire, especially a round wire. The wire travels over at least two wire guides. A wire-shaping assembly cross-sectionally shapes the round wire just before it starts to cut. A wire-rotating assembly rotates the wire around the latter's longitudinal axis.

Abstract: An electro-erosion machine with an essentially cylindrical tank (14) for holding a liquid dielectric and divided longitudinally into at least two sections (18 & 20). The sections slide together and apart along the circumference.

Abstract: The wire electrode advances upstream of the workpiece by a torus shaped wire guide with a position sensor to monitor the position of the wire electrode. Additional open v-grooved wire guides may also be present.

Abstract: A method and an apparatus electro-erosive machining for cutting a workpiece with an electrode in the form of a wire which is guided by at least one guiding head. A mechanism is incorporated for orienting either the workpiece or the electrode or both within a coordinate system, utilizing a sensor that determines the position of the surface of the workpiece within the coordinate system.

Abstract: A method of precision electric-discharge machining carried out in apparatus of moderately high precision and stability with an electrode in the form of a wire. The object is a surface as smooth as the surface that can be obtained with the more expensive very high-precision apparatus. The contour of work that has already been roughed out at least once is accordingly exploited as a geometrical reference for at least one finishing cut. The gap is maintained constant by fine adjustments.

Abstract: In a reciprocating internal combustion engine with a mechanically-driven charger (20), the number and disposition of cylinders of the internal combustion engine is such that free forces/moments of inertia are still provided. At least one shaft of the mechanical charger is disposed parallel to the crankshaft of the reciprocating internal combustion engine. The mechanical charger (20) is driven in an angle-synchronous manner with the crankshaft (32) of the reciprocating internal combustion engine. The transmission ratio between the charger and the crankshaft is in whole numbers. The charger (20) has a balancing centrifugal weight on at least one of its shafts which during operation counteracts the free forces of inertia of the reciprocating internal combustion engine for the purpose of a low-vibration or vibration-free operation of the internal combustion engine.

Abstract: A positive-displacement machine for compressible media has a positive displacement body that is retained on a disk-like rotor, which is eccentrically drivable relative to the housing, in such a manner that each of its points executes a circular motion during operation. To that end, an eccentric disk is disposed on a drive shaft, and the rotor is supported on this disk by means of an oil-lubricated bearing. The lubricating oil is delivered and removed to and from the side remote from the drive side of the drive shaft, and the separation of the oil inflow from the oil return flow is effected in the housing by a slide bearing which has one oil chamber each on both ends. The separation of the oil streams is effected by an indentation that does not extend over the entire length of the slide bearing. Through this indentation, the slide bearing is likewise supplied with oil. The indentation connects the oil inflow bore in the housing with the oil chamber.

Abstract: In a positive-displacement device for compressible media with a helically-shaped conveying chamber disposed in a stationary housing, a helically-shaped positive-displacement body is associated with the conveying chamber. The body is maintained on a disk-shaped rotor which can be eccentrically driven in relation to the housing in such a way that during operation, each one of its points performs a circular movement which is limited by the circumferential walls of the conveying chamber. The front faces of the positive-displacement body adjoining one lateral wall of the conveying chamber are provided with a groove into which a sealing strip, consisting of a resilient material which is capable of gliding, is inserted. The groove has at least partially a meander-like extent.

Abstract: A displacement machine for compressible mediums has several spiral-shaped conveying spaces (11a, 11b), which are disposed in a stationary housing lead from an inlet (12a, 12b), which lies radially on the outside, to an outlet (13), which lies radially on the inside. A displacement body, which is assigned to the conveying spaces has a disk (2) with spiral-shaped strips (3a, 3b) arranged perpendicularly on both sides. This displacement body, driven off-centered, is made of a magnesium alloy. During service, each of its points effects a circular movement defined by the circumferential walls of the conveying space. The ribs (45, 46) bordering the conveying spaces (11a, 11b) in the housing are made as one piece with the housing and the entire housing is made of the same or similar magnesium-based alloy as the displacement body (2, 3, 4, 5).

Abstract: A rotating spiral pump comprises a housing in which two displacement disks are rotatably disposed. The two displacement disks are provided on one side with ribs that extend in spiral fashion and interlock for the purpose of forming pumping chambers, and seal against the opposite displacement disk with their free face ends. The spirally extending ribs are embodied in several steps. The plurality of steps are spatially separated from each other by the formation of an space, and the radially outer step has at least twice as many pumping chambers as the radially inner step. Cooling means in the form of cooling ribs are preferably provided in the space, between the outlet of the radially outer step and the inlet of the radially inner step.

Abstract: An apparatus for measuring and/or controlling the tension in a ribbon or wire-type electrode of an electric discharge machine in which the ribbon or wire-type electrode is passed around a rotatable roller which is in operative engagement with a sensor. The roller is adapted to be driven in rotation by a motor or to be retarded by a brake. A support member for the roller and the motor or for the roller and the brake accommodates the weight of the roller and the motor or of the roller and the brake so that no load caused by the motor or the brake plus the roller acts in the direction of the tensile stress of the electrode. Any movement of the support means can be detected by a sensor, and the magnitude of the tension can be derived by a control unit from the output signal of the sensor. In operation, the control unit determines the tension on the wire and causes the unit to either increase or decrease the resistance caused by the roller.

Abstract: In an eccentric gear in which the gear rim of a first orbiting cog wheel is in engagement with the gear rim of a second rotating cog wheel, the two gear rims are offset from each other by an eccentricity. The second cog wheel is fixed to a driven shaft seated in a fixed housing. At least three eccentric shafts, which are evenly spaced about the circumference of the cog wheel, are provided for guiding the orbiting cog wheel, the eccentrics of each shaft being seated in respective bores of the orbiting cog wheel. One of the three eccentric shafts extends through the housing wall on one side and is formed as the drive shaft. The three eccentric shafts are coupled via a slider orbiting with an eccentricity which is considerably greater compared with the drive eccentricity.

Abstract: A displacement machine for compressible mediums exhibits several spiral-shaped conveying spaces, which are disposed in a stationary housing and which span a circumferential angle of approximately 360.degree.. The spiral-shaped displacement bodies, which are assigned to the conveying spaces and which span a circumferential angle of approximately 360.degree., are held in such a manner on a disk-shaped rotor, driven off-centered with respect to the housing, that during service each of their points effects a circular movement defined by the circumferential walls of the conveying spaces. The predominant reach of both the spirals of the conveying spaces and the displacement bodies extends with a first curvature and their exit-sided end exhibits over an angular range (.alpha.) of 45.degree. a second curvature that is clearly smaller.

Abstract: A displacement machine for compressible mediums exhibits several spiral-shaped convoying spaces (11a, 11b), which are disposed in a stationary housing (7a, 7b). A displacement body (1-4) is assigned to the conveying spaces and is held in such a manner on a disk-shaped rotor (1) that can be driven eccentrically relative to the housing that during service each of its points effects a circular movement defined by the circumferential walls of the conveying spaces. To this end an eccentric disk (23), on which the rotor (1) is mounted by means of an oil-lubricated mounting, is disposed on the drive shaft (24). A sliding bearing (22) is provided on the rotating eccentric disk (23) for the orbiting rotor (1). The oil is fed in and drawn off by way of a borehole (31) in the eccentric disk. Passages are disposed within the eccentric disk to feed oil without air into the sliding bearing gap.

Abstract: A displacement machine for compressible media includes a stationary housing, and a plurality of disks mounted for eccentric movement within the housing. Each of the disks has two symmetrically disposed spiral displacement bodies that are offset from one another by substantially 180.degree. mounted on at least one side thereof so that the spiral displacement bodies move in an orbital fashion within the housing during operation. The disks are positioned with respect to one another such that each of the spiral displacement bodies intermeshes with another spiral distribution body to define pairs of cooperating spiral displacement bodies. The spiral displacement bodies have a curvature that is dimensioned such that opposed surfaces of cooperating spiral displacement bodies substantially contact one another at at least one sealing line that progresses continuously during operation.