Abstract: An online prediction method of tool-electrode consumption adapted for an electrical discharge machining (EDM) apparatus includes an experimental design; extracting electrode consumption variables from machining parameters of the electrical discharge machining (EDM) apparatus; and obtaining a correlation between the machining parameters and the electrode consumption variables through a correlation analysis to obtain a prediction model capable of predicting an effective contact area of a tool-electrode and a workpiece. In addition, a prediction method of machining accuracy is provided.

Abstract: A tolerance error estimating apparatus, method, program, reconstruction apparatus and control apparatus capable of estimating a deviation of a drive axis from a reference position with respect to driving time are provided. A tolerance error estimating apparatus (processing apparatus 300) X-ray analysis apparatus comprises a specific position calculating section 320 for obtaining a specific position of a reference sample at each rotation driving time from X-ray detection images and a deviation amount calculating section 330 for calculating the deviation amount ?x in the x direction and ?y in the y direction of the center position of a rotation drive shaft as the rotation drive axis at each rotation driving time from the reference position based on the specific position, when the z direction of the orthogonal coordinate system fixed to the sample is set the direction parallel to the rotation drive axis.

Abstract: A wire electrical discharge machine includes: a drive control unit for moving a wire electrode relative to a workpiece along a machining path; a path determination unit for determining whether or not the machining path includes a linear path section that crosses a boundary line between a thick portion and a thin portion of the workpiece; and a path compensator for compensating the machining path so as to form, in the thin portion, a protrusion projecting outward from the boundary line when the path determination unit determines that the linear path section is included.

Abstract: A wire electrical discharge machine acquires measured dimensions of a test workpiece that has been machined with a wire electrode inclined at a given angle with respect to a running direction in which the wire electrode runs; and calculates, based on the measured dimensions, first actual information indicating an actual holding position at which the wire electrode is actually held at a first die guide for guiding the wire electrode to a workpiece, and second actual information indicating an actual holding position at which the wire electrode is actually held at a second die guide for guiding the wire electrode sent from the workpiece, and, when necessary, the wire electrical discharge machine rewrites first information and second information stored in a storage unit to the calculated first actual information and second actual information.

Abstract: A wire electrical discharge machine includes an upper wire guide and a lower wire guide supporting a wire electrode, a probe provided on an upper guide block having the upper wire guide, an offset storage unit for storing an offset amount from the upper wire guide to the probe, a position shift drive unit for changing the relative position between the table, and the upper and lower wire guides, a drive controller for controlling the position shift drive unit, a contact position calculator for calculating a contact position that is a position of the probe when it comes in contact, and a machining start position calculator for calculating a machining start position of the wire electrode, based on at least two contact positions and the offset amount. The drive controller controls the position shift drive unit so that the position of the wire electrode becomes the machining start position.

Abstract: An object recognition apparatus for automatic detection of an abnormal operation state of a machine including a machine tool operated in an operation space monitored by at least one camera configured to generate camera images of a current operation scene is provided. The generated camera images are supplied to a processor configured to analyze the current operation scene using a trained artificial intelligence module to detect objects present within the current operation scene. The processor is also configured to compare the detected objects with objects expected in an operation scene in a normal operation state of the machine to detect an abnormal operation state of the machine.

Abstract: To provide a wire electrical discharge machine for which the machining precision of corner parts and corner exit parts in a workpiece are improved. A wire electrical discharge machine includes a machining path compensation unit which compensates a machining path, in a case of creating a corner part which is a circular arc as a second machining block, by compensating a position of a center of the circular arc of the second machining block by way of a first compensation vector calculated based on at least one indicator among the four indicators of deflection of a wire electrode, etc.

Abstract: A machining condition selecting device includes a machining condition contribution data management unit configured to manage machining condition contribution data in which each of a plurality of machining conditions is associated with a 3-dimensional surface roughness parameter and degrees of contribution to each item of a required condition related to productivity of a target product; a matter of priority acquisition unit configured to acquire a combination of the 3-dimensional surface roughness parameter and at least one item of the required condition as a matter of priority; and a machining condition selection data management unit configured to manage, for each of the plurality of machining conditions, machining condition selection data in which a combination pattern of the matters of priority is associated with a sum of the degrees of contribution to each item in the combination pattern.

Abstract: 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.

Abstract: An electrical discharge machine includes: a machining power supply having a plurality of different circuit states, and configured to be capable of being set to one circuit state of the plurality of circuit states by switching at least one of electrical connection and electrical setting; a state determining unit configured to, when each of the plurality of circuit states is set as the circuit state of the machining power supply, determine whether or not the set circuit state is normal; a failure portion specifying unit configured to specify a failure portion of the machining power supply based on a determination result with respect to each of the plurality of circuit states obtained by the state determining unit; and a reporting unit (a display unit or the like) configured to report the failure portion specified by the failure portion specifying unit to an operator.

Abstract: Whether or not an inter-electrode voltage exceeds a voltage threshold is determined after a predetermined inter-electrode state determination period has passed since application of an induction voltage (inter-electrode voltage) to an inter-electrode gap. Thus, an inter-electrode gap amount between a wire electrode and a work is estimated. A pause time during which electrical discharge is not performed is changed according to an estimation result of the inter-electrode gap amount.

Abstract: A machining condition setter in a wire electrical discharge machine, sets up: as machining conditions, a first machining condition for enabling the core fixing function in a first section on the upstream side; a second machining condition for enabling formation of a slot in the workpiece in a second section on the downstream side; and a medial machining condition that is different from the first machining condition and the second machining condition in a medial section located between the first section and the second section.

Abstract: A control device includes: a control unit configured to control a main processing machine by replacing a machining shape on a machining surface of a workpiece specified in a program with a shape corresponding to an enlargement/reduction ratio and replacing a fixing distance for a core specified in the program with a distance corresponding to the enlargement/reduction ratio for the machining shape of the workpiece and a plate thickness ratio between the workpieces.

Abstract: A method for nominal scanning measurement includes allowing a user to select a shape of an object to be measured from a geometric shape menu prepared in advance, allowing the user to input, according to the selected geometric shape, a parameter to specify the geometric shape, allowing the user to select a measurement path from a measurement path menu prepared in advance, allowing the user to input, according to the selected measurement path, a parameter to specify the measurement path, calculating, based on the selected geometric shape, the input parameter of the geometric shape, the selected measurement path, and the input parameter of the measurement path, measurement points on a workpiece and a normal line direction at each of measurement points using a calculation formula prepared in advance, and calculating a path for scanning measurement to move while scanning a sequence of the measurement points.

Abstract: In a data collection system for electric discharge machines, multiple electric discharge machines are connected with a computer over a data transmission path. Information on machining conditions of an electric discharge machine is stored in a storage unit of the electric discharge machine, and information sent from the electric discharge machine after completion of machining is collected by the computer. By minimizing monitoring information that is temporarily stored in the storage unit, various kinds of monitoring information can be stored without being affected by a network environment.

Abstract: A machine tool has a saddle moving over a bed and a table moving over the saddle. A scattering prevention cover that receives chips generated and a cutting fluid supplied during machining of a workpiece placed on the table is fixed to the table. A first flow path fixed to the saddle receives the chips and cutting fluid discharged from the scattering prevention cover, and a second flow path fixed to the bed receives and discharges the chips and cutting fluid discharged from the first flow path.

Abstract: There is provided a display device which can make the user understand a motion of a control target device without preparing a three-dimensional model faithfully reproducing an outer view of each control target device. A PC (10) as the display device presents options of a virtual mechanism, and accepts a selection thereof. The virtual mechanism has a structure in which a plurality of mechanism elements are combined having interlocking relationships, and includes an abstracted mode not imitating a mode of a specific control target device. The options of the virtual mechanism include a plurality of virtual mechanisms which are mutually different in kind of the mechanism element or in form of the interlocking relationship among the mechanism elements.

Abstract: A wire-cut electric discharge machining machine which machines an object to be machined based on a command of a machining program includes a machining condition storage unit for storing machining conditions, a machining program analyzing unit for analyzing a machining condition search command specified in the machining program and acquiring search conditions designated by the machining condition search command, a search unit for retrieving machining conditions from the machining condition storage unit based on the acquired search conditions, and a machining unit for machining based on the machining conditions chosen by the search unit.

Abstract: In wire-electrical discharge machine and a numerical control apparatus thereof and a numerical control apparatus for controlling a machine tool, optional minute blocks are automatically created in front of and behind a connecting point, i.e., a joint of a block to which an offset command is instructed, and an offset value is exchanged between the minute blocks so that a correct offset value is set in a desired block.

Abstract: A control apparatus of the present invention includes a weight calculating unit that calculates weight of a core on the basis of an NC program and a first input from a user designating a material and a thickness of work, a fixing-necessary-distance calculating unit that calculates a fixing distance on the basis of the weight of the core, a fixing-position calculating unit that sets fixing positions such that a total length of the fixing positions is equal to the fixing length, a fixation-condition setting unit that calculates a machining condition setting value for fixation on the basis of the first input, and a machine driving unit that drives the wire electric discharge machine on the basis of the NC program and causes the wire electric discharge machine to machine places set in the fixing positions by applying machining conditions for fixation.

Abstract: A method and system for automated repair of a machine component is provided. According to the proposed method, a first geometry of the component, including a damaged portion of the component, is digitalized. A trough is then machined over the damaged portion of the component. The machining is numerically controlled using digitalized geometrical data of the first geometry of the component. A second geometry of the component is then digitalized subsequent to the machining, the second geometry including the trough. Subsequently, a material is deposited over the trough. The deposition of the material is numerically controlled digitalized geometrical data of the second geometry of the component.

Abstract: When graphic information is selected, program creating unit receives machining shape data from graphic information analysis unit and pivot axis information from rotation center storage unit. Based on the received data, the program creating unit generates a new amount of movement of a wire electrode relative to a workpiece and the amounts of rotation of pivots, used to machine the workpiece with the wire electrode held vertical.

Abstract: In a wire electric discharge machine that machines a blade section of a cutting tool, in a state in which a rod-shaped reference jig is fixed to a rotary axis, a position on an outer circumferential surface of the reference jig is measured at each rotation position and stored. A rotational run-out error is calculated based on the stored rotational run-out position information, and a machining program is corrected to cancel the rotational run-out error.

Abstract: A CAM apparatus includes: an input receiving unit that receives designation of a part where core fixing machining is performed in a machining shape forming a core and divides the machining shape into a first machining shape element for which the core fixing machining is performed and a second machining shape element, which is connected to the first machining element and for which the core fixing machining is not performed, a machining-condition setting unit that allocates a first electric condition for the core fixing machining to the first machining shape element and allocates a second electric condition to the second machining shape element, and a machining-program generating unit that generates a machining program for machining the second machining shape element under the second electric condition and continuously machining the first machining shape element under the first electric condition after the machining of the second machining shape element.

Abstract: The tension measuring unit that measures a physical amount corresponding to tension of a wire in a wire transport system, the fluctuation recording unit that records the physical amount measured by the tension measuring unit, the fluctuation analysis unit that obtains an average value, variation, and frequency analysis data of the recorded physical amount as an analysis result of the physical amount, the maintenance necessity determining unit that compares the analysis result with a reference value and determines whether maintenance is needed based on a comparison result and the display unit that displays a determination result are included, and it is made possible to accurately determine the time for maintenance for various components used in the wire transport system without using a measuring instrument.

Abstract: A wire electrical discharge machining apparatus includes a target-control-section calculating unit calculating a target control section, which is indicated by a start point and an end point of the corner control in a current electrical discharge machining during the finish machining, based on a machining parameter; an actual-control-section calculating unit correcting the start point and the end point of the corner control, which are indicated in the target control section calculated by the target-control-section calculating unit, and calculating an actual control section, based on a magnitude of a shape error of the corner portion in a previous electrical discharge machining during the finish machining; and a speed controlling unit controlling the feed speed of the wire such that an amount of machining per unit time in the actual control section becomes equal to that when a portion other than the corner portion is machined.

Abstract: On a wire guide supporting face of a wire guide supporting part which supports a wire guide of a wire electric discharge machine, two wall faces which are orthogonal to the wire guide supporting face are formed to be arranged in a V shape. On the other hand, two planar parts which are abutted on the two orthogonal wall faces, which are arranged in the V shape, of the wire guide supporting part are formed on the wire guide. Then, the wire guide is fixed on the wire guide supporting part with a screw in a state in which the two orthogonal wall faces of the wire guide supporting part and the two planar parts of the wire guide are respectively abutted on each other.

Abstract: Based on a discharging gap value and machining allowance value stored in a corner-control-information storing means 20, a speed-ratio calculating means 23 being a machining-volume calculating means calculates machining volumes of a straight line portion and a corner portion to calculate a volume ratio therebetween. A corner-portion-speed calculating means 24 calculates a machining feed speed at the corner portion based on a volume ratio calculated by the speed-ratio calculating means 23, and then outputs to a servo amplifier 8 on the basis of the length of a pre-corner section outputted by a pre-corner-section calculating means 21 and the length of a post-corner section outputted by a post-corner-section calculating means 22, instructions about machining feed speeds from entering the pre-corner section till getting out of the post-corner section.

Abstract: Two contact detection jigs are spaced apart and attached on a table on which a workpiece to be machined by a wire electric discharge machine is placed, and first, under a state serving as a reference, a distance between these two contact detection jigs (a reference distance) is measured by bringing the wire electrode into contact with these contact detection jigs. Subsequently, in a state of actual use, the wire electrode is brought into contact with these contact detection jigs in the same manner, so that a distance between these two contact detection jigs (an actual distance) is measured. Then, based on the difference between the reference distance and the actual distance, the amount of compensation is obtained to compensate an instruction for moving the wire electrode with respect to the table.

Abstract: One arbitrary point on an upper surface of a workpiece and two points at arbitrary heights on a tapered section of the workpiece are measured using a contact detector disposed on an upper wire guide of a wire electric discharge machine to calculate the shape accuracy and tapered angle. Based on the calculated data, the upper and lower wire guide support positions of the upper and lower wire guides are calculated. Using the calculated upper and lower wire guide support positions, electric discharge machining is performed on the workpiece.

Abstract: A relationship between a weight of a reel supported by a column of a wire electric discharge machine when a wire electrode is wound around the reel, and an amount of slanting of the wire electrode when the wire electrode extended between an upper wire guide and a lower wire guide becomes slanted as a result of the column being deformed by the weight of the reel is stored. The weight of the reel is determined during electric discharge machining, and the amount of slanting of the extended wire electrode is determined from the weight of the reel. A compensation amount for the slanting of the wire electrode is determined from the amount of slanting, and the slanting of the wire electrode is compensated by the compensation amount.

Abstract: The invention relates to electrical discharge milling machines using tool electrodes subject to longitudinal wear. The inventive discharge milling machine is equipped with a numerical controller executing at least one control cycle for compensating the wear considering the following steps: (a) determining the volume Q eroded by each discharge, (b) calculating the distance s travelled by the tool from one effective discharge to the next, (c) calculating the actual eroded linear volume M [m3/m] for at least one effective discharge, M forming a measurement sample from the values Q and s, (d) comparing said sample M with the corresponding set value C to generate an error D=C?M [m3/m], and (e) calculating and transmitting a command by the numerical controller intended to reduce this error D during the following cycle or cycles.

Abstract: An automated system for acting on a set of blocks in order to carry out at least one task including a central control device, at least one shared data line, and interface circuits for connecting the blocks to the shared line. In one embodiment of the invention, the control device includes a PC computer on which is installed an operating software for determining the phases of operation of the blocks.

Abstract: In order to detect a machining state of a wire electric discharge machine, the state of a machining gap is classified into three categories; an open-circuit state in which electric discharge does not occur after a first predetermined level is reached or surpassed by a machining-gap voltage, an electric discharge state in which electric discharge occurs after a second predetermined level is reached or surpassed by the machining-gap voltage, whereby the machining-gap voltage becomes lower than the second predetermined level, and a short-circuit state wherein a third predetermined level is not reached or surpassed by the machining-gap voltage. An average voltage in the machining gap is determined based on voltages in these states and the number of cycles of voltage application to the machining gap, number of open-circuits, number of discharges, and number of short-circuits per unit time.

Abstract: Machining state information is acquired for each predetermined period by performing test machining by an electric discharge machine, and the acquired machining state information is compared with reference machining state information, whereby whether a machining state is satisfactory or not is determined. If the machining state is determined to be unsatisfactory, set items of a machining condition are adjusted. Thereafter, test machining is actually performed again, and the machining condition is adjusted by changing the set items if the machining state is determined again to be unsatisfactory. Thus, the acquisition of the machining state information, determination of the machining state, and adjustment of the machining condition are repeated so that satisfactory machining is finally determined.

Abstract: A wire electric discharge machine is configured to machine a workpiece by computing an electric current at the machining time before starting a main machining and compensating a power source voltage for machining. The wire electric discharge machine measures an average electric current and an electric discharge frequency at the machining time, in a measuring section in an approach before the main machining, and computes a peak current at the machining time. Further, an electric voltage of a machining power source is compensated by comparing the computed peak current at the machining, with a reference peak current.

Abstract: A wire electric discharge machining program is analyzed and a target shape for a workpiece is created. Multiple amounts of adjustment by which the amount of wire radius compensation for a wire electrode is adjusted are set. One or more desired ones are selected from the amounts of adjustment, and the amount of wire radius compensation is calculated by adding the selected amount(s) of adjustment to the amount of wire radius compensation. A machining route which is offset from the created target shape by the calculated amount of wire radius compensation is created.

Abstract: An electric discharge machine includes at least one of a noncontact-position detection sensor that outputs a detection signal when a distance between a first contact body and a second contact body is equal to a preset residual distance in a noncontact phase and a drive unit that detects a load given on the main spindle, and a main-spindle-drive control unit stops moving of the main spindle in at least either a case where a moving amount of the main spindle since the noncontact-position detection sensor outputs the detection signal exceeds the residual distance or a case where it is determined that an overload is given from a detection result of the drive unit.

Abstract: An electroerosion control system includes a general CNC controller being configured for controlling a general CNC machine process, a power supply for energizing a tool electrode and a workpiece to be machined, an electroerosion controller electrically connecting with the power supply for controlling an output of the power supply, and adaptively and electrically connecting with the general CNC controller for communication thereof, and a sensor sensing real-time status information of a working gap between the tool electrode and the workpiece and for sending said real-time status information to said electroerosion controller. Said electroerosion controller automatically controls the electroerosion machining process through the general CNC controller according to the real-time status information of the working gap.

Abstract: An apparatus and a method are presented for finding positional relationships and geometrical changes of at least one rotating part attached to or forming part of a machine when the part is in a rotating mode. In the apparatus and method, geometrical changes of the part caused by its state of production and use, determine any locations on the rotating part which exhibit contaminants, and subsequently remove or compensate effects of such contaminants present on the rotating part.

Abstract: A wire electric discharge machining apparatus for machining a workpiece (7) by supplying current pulses to a work gap formed between a wire electrode (8) and the workpiece comprises a person detection sensor (10) for generating a person detection signal (EX) when the existence of a person is detected, and an NC device (20) that is configured to receive the person detection signal. When the NC device receives the person detection signal, it selects first machining conditions which improve machining speed. When the NC device does not receive the person detection signal, it selects second machining conditions which reduce the risk of wire breakage.

Abstract: A controller of an electrical discharge machine comprises: a control unit that controls a machining condition set by the electrical discharge machine; an acquisition unit that acquires a parameter indicating an electrical discharge state between poles in a state where the machining condition is controlled by the control unit so that a normal electrical discharge occurs between the poles; an arithmetic unit that obtains a probability density distribution of the acquired parameter; a decision unit that decides a threshold that specifies a boundary between a normal electrical discharge and an abnormal electrical discharge between the poles based on the obtained probability density distribution; and a discrimination unit that discriminates whether the electrical discharge state between the poles is normal or abnormal by using the decided threshold, and wherein the control unit controls the machining condition based on a discrimination result of the discrimination unit.

Abstract: A wire electrical discharge machine is provided with a rotating shaft for rotating a workpiece. In wire electrical discharge machining according to a machining program, a current average rotation radius at a current workpiece machining point is calculated for each predetermined period, based on average rotation radii at respective end points of a block to be executed and a directly preceding block and an amount of movement of the rotating shaft. Based on the calculated current average rotation radius, control is performed such that the speed of movement of the wire electrode relative to the workpiece machining point agrees with a command speed acquired from a machining power supply.

Abstract: An ultra-hard material fixed to a cutting tool is formed into a cutting blade by electric discharge machining. The wire electric discharge machine has a rotating shaft to which the cutting tool is mounted, and has a touch sensor mounted to an upper wire guide. A measurement program is generated on the basis of a machining path instructed by the machining program. A machining program is regenerated from rotating shaft coordinate information and path coordinate position information obtained at measurement points, on the basis of the measurement program. As a result, a rake face position of the cutting tool can be accurately measured and a wire electrode can be positioned accurately with respect to that position during machining.

Abstract: A method of operating a machine tool, e.g., an electrical discharge machine, and a machine tool system with a machine, e.g. an electrical discharge machine, for machining a workpiece may include numerous configurable modules (DRIVE; GEN; CONTROL) to perform at least one of controlling, monitoring and carrying out of the machining of a workpiece. The modules (DRIVE; GEN; CONTROL) are arranged on the machine and are linked by a data network to a node for at least one of sending data to the node and receiving data from the node.

Abstract: An electric discharge machining device that performs processing by applying a voltage pulse to space between the processing electrode and the workpiece and suitably switching the polarity of the voltage pulse attains both desired processing accuracy and desired controllability. The electric discharge machining device is provided with the first to fourth switching elements. The controlling unit that controls these switching elements, when setting a period time in which the first switching element is turned on, a period of time in which the fourth switching element is in an on-state in the same period, and, when setting a period time in which the second switching element is turned on, a period of time in which the third switching element is in an on-state in the same period so that a desired voltage pulse is applied to the space between the processing electrode and the workpiece.

Abstract: A positioning device includes a driver which moves a positioning object and a sensor which measures the distance to the positioning object in a non-contacting manner and outputs a detection signal if the positioning object is detected only in a length measuring area within a predetermined range from any detection position, shaft controller which stops the driver by detecting the detection signal from the sensor and automatically correcting for an overshoot amount between the stop position and any detection position, when the driver moves the positioning object and the sensor, and the positioning controller that stores the coordinate value after the automatic correction by the shaft controller and that performs the positioning based on the reference coordinate value.

Abstract: For specifying a cause of generation of a water level abnormality alarm in a wire-cut electric discharge machine, stopping supply of a machining liquid to a machining tank when the alarm is generated, draining the liquid; measuring an amount of change in the water level per unit time that is detected by the water level detecting unit; and displaying a question to an operator about the measured amount of change in water level and the state of a water level adjusting mechanism. The operator manually inputs an answer to the displayed question, and specifies, from the answer input by means of the inputting unit, a part which causes the generation of the alarm.

Abstract: An electroerosion control system includes a general CNC controller being configured for controlling a general CNC machine process, a power supply for energizing a tool electrode and a workpiece to be machined, an electroerosion controller electrically connecting with the power supply for controlling an output of the power supply, and adaptively and electrically connecting with the general CNC controller for communication thereof, and a sensor sensing real-time status information of a working gap between the tool electrode and the workpiece and for sending said real-time status information to said electroerosion controller. Said electroerosion controller automatically controls the electroerosion machining process through the general CNC controller according to the real-time status information of the working gap.

Abstract: A wire electrical discharge machine (WEDM) is disclosed, which comprises: a movable crane; a measure unit, mounted on the crane for measuring the deformation of the same; and a control unit, electrically connected to the measure unit and used for controlling the crane to move; wherein a lookup table describing the relation between the crane's deformation and position error is stored in the control unit, basing on which the control unit is able to perform a feedback displacement control on the crane with respect to its deformation.