The disclosure provides an electric discharge machining apparatus. The apparatus includes: temperature sensors respectively attached to an upper portion, a middle portion, and a lower portion of the electric discharge machining apparatus and measuring temperatures of the electric discharge machining apparatus at predetermined time intervals; a control device calculating values of temperature environment diagnostic indexes, which are indexes for determining machining accuracy of the workpiece obtained when electric discharge machining is performed in a current temperature environment, from measurement results of the temperature sensors, comparing the values of the temperature environment diagnostic indexes with reference values of the temperature environment diagnostic indexes recommended for achieving desired machining accuracy, and outputting determination results indicating a degree of whether the current temperature environment around the electric discharge machining apparatus is appropriate for achieving the desired machining accuracy according to differences; and a storage part storing the reference values and the determination results.

A core moving device is provided, including a core adsorption holding part for adsorbing and moving a core cut out of a workpiece with a magnetic force of a magnet. The core adsorption holding part includes: a rod member, a distal end portion of which is constituted of the magnet; a bottomed cylindrical member which has a bottom surface on a distal end portion side and into which the rod member is inserted from a base end portion side; and a cylindrical member drive part which moves the bottomed cylindrical member forward, wherein the bottomed cylindrical member, on one hand, moves backward to adsorb the core to the magnet and, on the other hand, moves forward to remove the core adsorbed to the magnet.

A machine learning device, performing machine learning for adjusting a position and a length of a welding part when a core is welded to a workpiece in a wire electric discharge machine, acquires the position and the length of the welding part as state data; sets reward conditions; calculates a reward based on the state data and the reward conditions; performs the machine learning of the adjustment; determines and outputs an adjustment target and its adjustment amounts based on the state data and a result of the machine learning; performs the machine learning of the adjustment based on the output adjustment action, the state data acquired based on the recalculated position and the recalculated length of the welding part, and the reward based on the state data; and outputs an optimum position of the welding part, the reward conditions being set as a positive or negative reward.

A method for working an airfoil cluster is disclosed. The method may include attaching a first datum to a first portion of the airfoil cluster, and joining a second portion of the airfoil cluster to the first portion, the second portion having a second datum substantially aligned with the first datum in a common plane spaced away from the first and second portions.

A machining time-estimating method for a wire electrical discharge machine for estimating the remaining machining time (Tr) during the machining of a workpiece comprises: a step for setting a predicted machining velocity; a step for determining the actual machining velocity; a step for determining an estimated machining velocity so as to incorporate the predicted machining velocity and the actual machining velocity at a specified ratio, that is, a reference ratio; and a step for calculating remaining machining time from the estimated machining velocity. By executing the actual machining velocity-determining step to the remaining machining time-calculating step repeatedly to estimate remaining machining time moment by moment, remaining wire electrical discharge machining time is estimated with reduced error.

A fixing device (1) for fixing workpieces, to fix substantially rod-shaped workpieces and workpieces to be machined by wire erosion or lasing, including a support apparatus (20) with a plurality of shaped elements (21) for accommodating and supporting a plurality of workpieces in the correspondingly formed shaped elements (21), and for positioning and fixing the workpieces in at least one translatory degree of freedom (22) in the shaped elements (21), wherein the fixing device (1) has a clamping apparatus (50) by means of which pressure force (52) can be applied to a plurality of workpieces accommodated in the shaped elements (21) so that the workpieces are fixed in the clamping apparatus (50) at least in a friction lock due to the applied pressure force, and wherein the support apparatus (20) as shaped elements (21) includes a plurality of passages (30) through which the workpieces can be guided.

Separating device (1) for separating at least one object (2-10) from an object carrier (11), in particular for separating an additively built three-dimensional object (2-10) from a build plate, preferably built via an apparatus for additively manufacturing three-dimensional objects (2-10) by means of successive layerwise selective irradiation and consolidation of layers of a build material which can be consolidated by means of an energy source, which separating device (1) comprises at least one separating element (12) that is adapted to remove material for separating the at least one object (2-10) from the object carrier (11), wherein a control unit (15) is provided that is adapted to control at least one operational parameter of the at least one separating device (1), in particular a feed rate and/or a cutting rate of the separating element (12), dependent on at least one object parameter of the at least one object (2-10).

Separating device (1) for separating at least one object (2-10) from an object carrier (11), in particular for separating an additively built three-dimensional object (2-10) from a build plate, preferably built via an apparatus for additively manufacturing three-dimensional objects (2-10) by means of successive layerwise selective irradiation and consolidation of layers of a build material which can be consolidated by means of an energy source, which separating device (1) comprises at least one separating element (12) that is adapted to remove material for separating the at least one object (2-10) from the object carrier (11), wherein a control unit (15) is provided that is adapted to control at least one operational parameter of the at least one separating device (1), in particular a feed rate and/or a cutting rate of the separating element (12), dependent on at least one object parameter of the at least one object (2-10).

A core moving device includes a core adsorption holding part which adsorbs a core cut out of a workpiece with a magnet and moves the core, in which the core adsorption holding part includes a rod member in which a distal end portion thereof is constituted of the magnet, a cylindrical member into which the rod member is inserted and which, on one hand, moves backward to expose a distal end surface of the rod member so that the core is adsorbed to the distal end surface of the rod member and, on the other hand, moves forward to protrude from the distal end surface of the rod member so that the core is removed from the distal end surface of the rod member, and a cylindrical member drive unit which at least moves the cylindrical member forward.

A device for machining a part (8) by electrical discharge machining using an electrode wire (4), comprising: means (20, 30, 60) for holding the electrode wire (4) taut and driving it to translate longitudinally, in proximity to said part (8) to be machined, in a sparking zone (5), means (50) for making a stream of dielectric liquid flow through the sparking zone (5) between the electrode wire (4) and the part (8) to be machined, an electrical power source (10) for generating electrical pulses that cause sparks in the sparking zone (5) between the electrode wire (4) and the part (8) to be machined, controlling means (40) that control the device depending on the machining parameters, measuring means (70) for evaluating the quantity of gas bubbles present in the sparking zone (5) between the electrode wire (4) and the part (8) to be machined, and for delivering to the controlling means (40) a signal (73) representative of said quantity of gas bubbles, in the controlling means (40), adapting means (41) for modifying the machining parameters, so as to maintain the value of said signal (73) within a suitable range of signal values.