222 results about "Electrodischarge machining" patented technology

The invention particularly relates to a discharge machining simulation control system for a nuclear power plant in a high-radiation boron-containing water environment, which belongs to the technical field of special maintenance in the high-radiation environment of the nuclear power plant and comprises a man-machine interaction system, a discharge machining control system and subsystems. Each subsystem comprises a pulse power supply system, a servo power system, a washing system, a purification system, a grounding system and a tool system; the man-machine interaction system is used for man-machine interaction and displaying the discharge machining implementation data fed back by the subsystems; the electric discharge machining control system is used for generating an electric discharge machining instruction according to the man-machine interaction information and controlling the subsystems to cooperate to perform electric discharge machining work; and each subsystem is used for implementing electric discharge machining work according to the electric discharge machining instruction and feeding back electric discharge machining implementation data. According to the invention, simulation control of discharge processing in the high-radiation boron-containing water environment of the nuclear power plant is realized.

The invention belongs to the technical field of machine manufacturing, and particularly relates to a metal part discharge machining precision control method and system.The method comprises the steps that discharge gap multi-dimensional physical parameters are sensed in real time in a multi-modal mode, high-dimensional feature extraction and data fusion are carried out, an intelligent discharge state prediction model is constructed, and on the basis of a prediction result, a metal part discharge machining precision control system is obtained. And processing parameters such as a pulse power supply, servo feeding and dielectric liquid are adjusted in an ultra-fast and self-adaptive mode, and iterative optimization of the processing process is achieved. By the adoption of the technical scheme, the machining precision, the surface quality and the consistency of the metal part can be remarkably improved, electrode loss is reduced, and the machining efficiency is improved.

Common mode voltage discharge shields are disposed over end turns of stator windings for a three phase electric traction motor within an electric vehicle. The common mode voltage discharge shields are capacitively coupled to the end turns to a ground strap, providing a low impedance path for common mode voltages accumulating at a neutral for electric traction motor as a result of high frequency switching of the motor drive voltage to produce desired torque. An insulating layer separates the common mode voltage discharge shields from the end turns. Accumulation of the common mode voltage in excess of a bearing breakdown voltage, and the associated potential for discharge through bearings between the stator and rotor and electrical discharge machining, is reduced or eliminated.

The invention provides an under-water discharge machining system and method for a radiation environment. The under-water discharge machining system comprises a pulse power supply control system, an electric spark machining head device and a servo control system. The pulse power supply control system comprises a power supply control box, a rectifier and a power amplifier which are electrically connected in sequence. And the power amplifier is electrically connected with the servo control system and the electric spark machining head device. The electric spark machining head device is provided with a feedback signal wiring connected to the servo control system. The pulse power supply control system is matched with the servo control system to drive the electric discharge machining head device to guarantee the process of the workpiece to be machined, so that the problem that conventional electric discharge machining equipment cannot be used in the high-radiation and boron-containing water environment is solved.

An example method includes providing a wide bandgap semiconductor workpiece. The example method includes exposing the wide bandgap semiconductor workpiece to one or more electrical discharges from an electrical discharge machining (EDM) system to reduce a surface roughness of the wide bandgap semiconductor workpiece. Exposing the wide bandgap semiconductor workpiece to the one or more electrical discharges may include submerging a surface of the wide bandgap semiconductor workpiece in a dielectric fluid; positioning an electrode head relative to the surface such that a gap is defined between an end of the electrode head and the surface; and generating an electrical discharge across the gap to create a plasma zone within the gap such that a material is removed from the surface.

The invention discloses a blind groove electric spark trepanning and reciprocating vibration multi-channel discharging combined machining method, and belongs to the technical field of discharging machining. According to the method, firstly, a thin-wall electrode is adopted for conducting electric spark nesting machining on the outline of the large-depth blind groove, and a blank of the blind groove is efficiently drawn; and then reciprocating vibration multi-channel electric discharge machining is adopted to conduct efficient corrosion removal on the material core obtained after previous trepanning machining, and the corrosion removal efficiency and the surface quality are greatly improved through the synergistic effect of high-frequency reciprocating vibration of an electrode and multi-channel electric discharge. The interpolar chip removal, cooling and deionization characteristics in the machining process are improved, and the machining stability is maintained. Energy is dispersed to multiple channels through multi-channel discharge, the energy density of a single channel is reduced, electrode loss is reduced, and the surface quality is improved. The method is suitable for machining large-depth blind grooves with various end face sizes, the machining time is remarkably shortened, and the cost is reduced.

The invention belongs to the technical field of special maintenance in a high-radiation environment of a nuclear power plant, and particularly relates to a digital control system and method for high-radiation boron-containing underwater electrical discharge machining. Comprising a control module, the control module is respectively connected with a human-computer interaction interface, an input / output module, an analog-to-digital conversion module and field layer equipment, the input / output module is connected with a limit switch, and an external alarm and a control instruction are input into the input / output module. And the temperature signal, the gap voltage current and the conductivity are converted by the analog-to-digital conversion module and then are input to the control module. The method has the beneficial effects that in the electric spark discharge machining operation process under the high-radiation boron-containing water environment of a nuclear power plant and the like, centralized and effective control over all field layer equipment is achieved, and the problem that conventional discharge machining equipment cannot be used under the high-radiation boron-containing water environment is solved.

The invention provides a font processing technology which comprises the following steps: S1, designing a combined electrode according to the shape of a cavity on a mold core: the combined electrode comprises a first electrode and a second electrode, the first electrode is provided with a font appearance electrode, the font appearance electrode is designed corresponding to a font, and a plurality of sharp corner processing parts are reserved at sharp corner positions of the font; a sharp corner electrode is arranged on the second electrode and is used for removing the sharp corner processing part and forming a font sharp corner; s2, a combined electrode is machined, specifically, a proper carving knife is selected to conduct CNC milling machining on the combined electrode; s3, first-time electric discharge machining is conducted, specifically, a first electrode is used for conducting first-time electric discharge machining on the mold core, and primarily-machined characters are obtained; and S4, second-time electric discharge machining is conducted, specifically, a second electrode is used for conducting second-time electric discharge machining on the mold core, font sharp corners are formed, and final fonts are obtained. The font sharp corner position is split and avoided, complementary machining is conducted through the combined electrode, font sharp corners can be formed, and the appearance quality of products is guaranteed.

An electric discharge machine includes an electric discharge machining unit that performs electric discharge machining on a workpiece in a machining liquid, and a filter that removes sludge contained in the machining liquid, and in a case where the workpiece is made of an aluminum-based material, the electric discharge machining is performed using a machining liquid whose specific resistance value becomes a prescribed value or less by adding an agent, the prescribed value being a value of 30,000 [Ωcm] or less.

An example method includes providing a wide bandgap semiconductor workpiece. The example method includes exposing the wide bandgap semiconductor workpiece to one or more electrical discharges from an electrical discharge machining (EDM) system to reduce a surface roughness of the wide bandgap semiconductor workpiece. Exposing the wide bandgap semiconductor workpiece to the one or more electrical discharges may include submerging a surface of the wide bandgap semiconductor workpiece in a dielectric fluid; positioning an electrode head relative to the surface such that a gap is defined between an end of the electrode head and the surface; and generating an electrical discharge across the gap to create a plasma zone within the gap such that a material is removed from the surface.

An engraving electric discharge machine (100) is provided with: a main shaft (1); a machining electrode (5) which is detachably mounted on the main shaft (1) and which machines the workpiece (16) by means of non-contact discharge on the workpiece (16) placed in an insulating machining liquid; an imaging device (3) that is detachably mounted on the main shaft (1) so as to be replaceable with the machining electrode (5), images the workpiece (16) that has been machined by the machining electrode (5), and acquires imaging data indicating the shape of the workpiece (16) that has been machined; a contact detection unit (70) that is connected to the main shaft (1) and detects the contact when the imaging device (3) is in contact with the workpiece (16) when the imaging device (3) is mounted on the main shaft (1); and an NC device (72) for controlling the movement and stop of the main shaft (1), the NC device (72) emergently stopping the movement of the main shaft (1) when the contact detection unit (70) detects the contact. The user inspects the shape and size of the workpiece (16) on the basis of the captured data.

A wire electrical discharge machining (EDM) device comprises the following: a pair of wire parallel guide rollers arranged on both sides of a workpiece to hold the workpiece between them, each of these rollers having a plurality of wire guide grooves formed at equal intervals on an outer circumferential surface, the plurality of wire guide grooves causing a plurality of running cutting wire sections to fit into them and constraining the movement of the plurality of cutting wire sections; parallel wire extension position measuring units (52a, 52b) which measure a distance between a measuring reference surface set parallel to a virtual plane containing the plurality of cutting wire sections and a wire electrode forming the plurality of cutting wire sections;a wire guide groove detachment detection unit (53) that detects the occurrence of a change in distance based on a measurement result obtained from the parallel wire extension position measuring units (52a, 52b); and a wire condition determination unit (54) that determines, based on the detection result obtained from the wire guide groove detachment detection unit (53), whether it is a wire detachment condition in which at least one of the cutting wire sections has detached from the wire guide groove, or a wire contact condition in which all cutting wire sections are in contact with the wire guide grooves.

The present invention belongs to the technical field of precision electrospark machining, and specifically relates to a magnetorheological fluid dynamic compensation electrospark machining system and method. The machining system includes: an electrospark machine bed, a drive motor, an electrode spindle, a pulse electromagnet integrated electrode structure, an auxiliary pulse electromagnet, a controller, a fixture, a workbench, and a magnetorheological fluid circulation system. The present invention uses pulsed magnetic field control to form a solid-state conductive structure of the magnetorheological fluid, establishes a controllable discharge gap in the discharge stage, and utilizes the breakdown of a silicone oil-based carrier medium to achieve non-contact discharge machining; in the intermittent stage of the magnetic field, the magnetorheological fluid restores its liquid properties, and synchronously achieves efficient discharge of erosion products, active cooling of the machining area, and micro-abrasive assisted surface finishing through directional flow. This method combines the coordinated control of magnetic field intensity and pulse timing to achieve dynamic reconstruction and compensation of the conductive structure, effectively solving the problem of electrode loss compensation.

The invention belongs to the technical field of special maintenance in a high-radiation environment of a nuclear power plant, and particularly relates to a digital power supply system and method for high-radiation boron-containing underwater electrical discharge machining. The AC external power supply is connected with an external power supply; the AC external power supply is connected with a rectification module; a synchronous trigger signal is input into the rectification module; the rectification module is connected with a filtering module; the protection module and the monitoring module respectively output signals to the rectification module, the storage module and the filtering module. The device has the beneficial effects that controllable and stable discharge machining operation power supply output is provided in the electric spark discharge machining operation process in a high-radiation boron-containing water environment such as a nuclear power plant, and the problem that a conventional discharge machining power supply cannot be used in the high-radiation boron-containing water environment is solved.

In the maintenance system of an on-line electric discharge machining apparatus, there are provided: a management device (5) that manages reference maintenance data indicating a state that maintenance of reference components of a factory-completed wire electric discharge machining apparatus is required, in accordance with a group determined based on the attribute information of the factory-completed wire electric discharge machining apparatus; a wire electric discharge machining apparatus (1) that transmits reference data indicating a reference state of an object component and usage state data indicating a usage state; and a maintenance diagnosis device (6) that receives the attribute information of the wire electric discharge machining apparatus 1, selects a group based on the attribute information, calls the reference maintenance data of the selected group from the management device (5), and diagnoses that maintenance is required when the usage state data received from the wire electric discharge machining apparatus (1) reaches the reference maintenance data. Thus, it is possible to accurately determine the timing for maintenance such as component replacement of the wire electric discharge machining apparatus.

This invention discloses a hydrogen-based electrical discharge machining (EDM) system, relating to the field of EDM. The system includes: a contact detection system for detecting the contact state between the electrode and the workpiece and outputting the contact detection signal to the machining control system; a detection switching system for switching between machining and detection modes, receiving switching commands from the machining control system, and connecting the electrode and workpiece to either the contact detection system or the EDM system; and a pulse voltage system for providing low-voltage pulse discharge energy. Compared with existing technologies, the advantages of this invention are: by comprehensively utilizing a special mechanical structure of a dual-slide stage, a rapid switching circuit, hydrogen as a reducing working medium, and low-voltage pulse capacitor discharge technology, this invention systematically solves the four inherent bottlenecks of traditional gas EDM: high voltage dependence, surface oxidation and degradation, servo return error, and process monitoring lag. Ultimately, it achieves high-precision, high-quality, high-efficiency, and inherently safe precision EDM.

Provided is an electrical discharge machining method for machining a mold (30) used for molding an integrally molded article of a metal member and a resin molded body that contains a resin, the electrical discharge machining method comprising: a first step for selecting, as an electrical discharge machining electrode of a die-sinking electrical discharge machine, at least a portion of a metal member (10) having the same material and the same shape as the aforementioned metal member; and a second step for implementing die-sinking electrical discharge machining on a prescribed region of the mold (30) so as to follow the shape of the electrical discharge machining electrode using the electrical discharge machine. This makes it possible to reduce processing time and manufacturing cost in a step until the shape of the mold (30) is formed, and makes it possible to achieve excellent shape matching between the metal member (10A) and the mold (30) during molding of an integrally molded article (90).

The present invention provides a wire-electrode discharge machining device and a wire-electrode discharge machining method that can minimize the reduction in machining speed and improve machining accuracy. The present invention provides a wire-electrode discharge machining device comprising a wire electrode, an upper guide assembly, and a lower guide assembly. The upper guide assembly comprises an upper wire-electrode guide, an upper current-carrying element, and a current-carrying element moving device. The lower guide assembly comprises a lower wire-electrode guide and a lower current-carrying element. The upper current-carrying element and the lower current-carrying element are configured to contact the wire electrode and supply power to the wire by moving from an initial position in a horizontal uniaxial direction, where the upper current-carrying element is not in contact with the wire electrode. The current-carrying element moving device is configured to move the upper current-carrying element from the initial position in the horizontal uniaxial direction by a predetermined offset amount, the offset amount being set based on machining conditions, the machining conditions including at least one of a condition of the wire electrode, a surface roughness required for a machining surface of a workpiece, and a condition of the workpiece.

The innovative electric discharge machining method allows to produce particles of smaller size and to assist the material in floating within the dielectric fluid and reaching the machine filtering system more efficiently through an electrical discharge machining system (1000); machining comprises application of electricity to a workpiece (1040) through an electrode (1050) and generation of metal particles (1090) by micro-fusion of the workpiece (1040) due to electric sparks; the workpiece (1040) is made of metal; the electrode (1050) is at a distance from the workpiece (1040); the workpiece (1040) to be machined is immersed in a liquid (1080) contained in a tub (1010) during machining; the liquid (1080) is essentially made by a dielectric material. Graphene particles (1095) are added to the liquid (1080) before starting machining and the liquid (1080) is circulated outside the tub (1010) during machining so that agglomerates comprising graphene particles (1095) and metal particles (1090) are filtered out of the circulated liquid, and graphene particles (1095) are also supplemented to the liquid (1080) during machining.

The wire discharge machining device comprises: a machining mechanism (13), which is a mechanism for discharge machining; a plate thickness estimator (24), which estimates the plate thickness of the workpiece at the machining position when performing rough machining of the workpiece by discharge machining; a plate thickness outputter (25), which outputs plate thickness data that associates plate thickness information indicating the estimated plate thickness with position information to the outside of the wire discharge machining device; a plate thickness inputter (26), to which the plate thickness data is input from the outside of the wire discharge machining device; a step position estimator (27), which estimates the position of a step portion of the workpiece where the plate thickness changes based on the input plate thickness data; an electrical condition controller (22), which controls the application of a pulse voltage based on the plate thickness data and step information indicating the position of the step portion when performing fine machining of the workpiece by discharge machining after rough machining; and a control device, which controls the machining mechanism based on the plate thickness data and the step information when performing fine machining.

A micro-hole EDM method and system with online electrode trimming is described. During the machining process of a workpiece by a tool electrode, the tool electrode performs machining in multiple continuous cycles. Each cycle consists of a normal forward machining period and a reverse trimming period. The normal forward machining period consists of multiple positive pulses. During the normal forward machining period, a positive pulse voltage is applied to the workpiece and the tool electrode, directed from the workpiece toward the tool electrode, causing electrical discharge machining (EDM) on the workpiece. The reverse trimming period consists of multiple reverse pulses. During the reverse trimming period, a reverse pulse voltage is applied to the tool electrode and the workpiece, directed from the tool electrode toward the workpiece, causing electrical discharge trimming of the tool electrode. A control module switches between the positive and reverse pulse voltages. This solution can improve the efficiency, quality, and consistency of micro-hole EDM.

The utility model discloses a novel V-shaped segment difference middle die, which belongs to the technical field of segment difference dies, aims at solving the problems of high processing cost and low processing efficiency of the existing V-shaped segment difference middle die, and comprises an upper middle die segment difference, and the top of the upper middle die segment difference is detachably connected with a lower middle die inner hole. Positioning pins are arranged in the section difference of the upper middle die and the inner hole of the lower middle die; the middle die of the die is divided into the upper middle die segment difference and the lower middle die inner hole to be machined separately, the manufacturing process is changed, the original discharge machining middle die segment difference is changed into low-speed wire feeding machining segment difference inclination, the discharge cost and time are saved, and the machining efficiency is improved. After the inner holes of the upper middle die and the lower middle die are separately processed, the upper middle die and the lower middle die are combined together by using the positioning pin and the bolt to form the V-shaped segment difference middle die, and the V-shaped segment difference middle die can be separately and efficiently processed through the structure, so that the service life of the die is prolonged, the processing efficiency is improved, and the processing time of the die and the discharge cost of copper are saved.

This invention relates to an adjustable electrical discharge machining (EDM) apparatus and method, comprising a stage and an EDM unit. The stage is used to place a workpiece with a defined processing target area. The EDM unit's discharge electrode cuts the processing target area of ​​the workpiece along a first cutting direction using at least one processing parameter. The processing parameter is adjusted according to changes in a specified parameter of the workpiece to a first value, thereby using the adjusted processing parameter to perform a second cutting step on the processing target area of ​​the workpiece. This invention proposes a segmented cutting technique, which can solve the problem of cutting speed (mm) caused by changes in specified EDM cutting parameters. 2 The problem of slowing down ( / min) and increasing the total cutting time.

The machining condition adjustment device includes a simulation unit that simulates a wire electrical discharge machine based on predetermined machining content, required specifications, and predetermined machining conditions; an updating unit that updates a calculation model of the simulation unit; and a calculation unit that calculates a machining state in the simulation. The device stores a model, obtained by machine learning, of an adjustment behavior of the machining state, suitable for bringing the machining state closer to a reference value of a machining state based on reference conditions, for the predetermined machining state. The device predicts the adjustment behavior of the machining state using the stored model, and adjusts the machining conditions used for the simulation based on the prediction.

An electric spark machining coordinate collecting and executing method comprises the steps that S1, in a calculation environment with a three-dimensional geometric processing function, a first coordinate position where interference-free entering and a second coordinate position where machining is terminated are obtained; s2, mapping from the reference zero point to a physical processing zero point on an electric spark machine tool; s3, after the physical electrode is automatically replaced on the machine tool, the geometric deviation of the physical electrode is measured, and the deviation serves as a tool offset parameter to be written into a numerical control system; and S4, an electrode is controlled to execute electric discharge machining from the first coordinate position to the second coordinate position. According to the method, coordinates are obtained through simulation, the risk of motion interference of the electrode in a complex inner cavity is eliminated in advance, and the problem that visual tool setting cannot be achieved during blind hole machining is solved. A large amount of coordinate acquisition work is transferred to the computer end, the machine tool end only needs to execute automatic calibration and machining, the shutdown waiting time is remarkably shortened, and continuous automatic production is achieved.

The invention relates to the field of electrochemical discharge machining of electrodes, in particular to an electrochemical discharge machining device for a hydrogen storage wire electrode, which is characterized in that the surface of a tool electrode is coated with a hydrogen storage material coating, decomposition of a hydrogen storage material is triggered by high temperature generated in the machining process, a large amount of hydrogen is released, and bubbles are formed, so that the bubbles are quickly gathered to form a stable gas film; according to the method, energy consumption required by bubble generation depending on an electrolytic reaction in a traditional process is remarkably reduced, and the generation efficiency of a gas film is improved; the hydrogen storage material coating can continuously release hydrogen, the stability and continuity of a gas film can be guaranteed even in a complex processing environment, and the problem that in the prior art, a discharge position is changed due to the fact that the gas film is unstable is solved. The machining device is suitable for micro machining of various hard and brittle materials including glass, ceramics, silicon nitride and the like, and particularly has unique advantages in machining of microstructures with large depth-to-width ratios and thick workpieces.

This application discloses a machine tool structure with a combined machining head. The application includes: a first base and a second base, the first base having a working area for placing the workpiece to be processed; a column, on which a first X-axis linear module is mounted; a first group of electrical discharge machining (EDM) heads, comprising at least four heads mounted on the first base and respectively connected to the first X-axis linear module, each of the four heads having an independent Y-axis linear module and a Z-axis linear module; and a second group of EDM heads, comprising at least one head mounted on the first base, the second base having a second X-axis linear module, the at least one head connected to the second X-axis linear module, the at least one head having an independent Y-axis linear module and a Z-axis linear module, and all four heads connected to an EDM power supply.

A machining device for a system to be measured for laser machining, grinding or electrical discharge machining of a workpiece into a tool and having a plurality of translating and / or rotating machining axes, comprising: a machining unit comprising a laser system having an optical system for generating, guiding and / or moving a laser beam along an optical axis, a grinding tool rotating about a machining axis or an electrode tool for generating an electrical discharge; a workpiece support to which a workpiece attachment is attached, arranged to move about a second rotational machining axis, the second rotational machining axis being movable relative to a first rotational machining axis perpendicular to the second rotational machining axis; a measurement system positioned at the center of the first rotational machining axis and oriented towards a machining zero point defined by an intersection of the first rotational machining axis and the second rotational machining axis, the measurement system configured to make a measurement along the first measurement axis and / or the second measurement axis to determine measurement data; and a control unit configured to control the processing unit and / or the measuring system.

The utility model relates to the technical field of precision machining, in particular to a splash-proof precision electric discharge machine, which is characterized in that a support frame is fixedly arranged at the bottom of a worktable, four corners of the bottom of the support frame are fixedly provided with support legs, a placement frame is fixedly arranged in the worktable, a splash-proof cover is arranged on the outer side of the worktable, and an upper splash-proof mechanism is arranged on the splash-proof cover; the sliding blocks are fixedly arranged on the front side and the rear side of the left inner wall and the right inner wall of the splash-proof cover respectively and slidably arranged in sliding grooves formed in the supporting legs, threaded rods are rotatably inserted into the sliding grooves through bearings, the threaded rods are rotatably sleeved with the sliding blocks through threads, the motor is fixedly arranged in the supporting leg on one side, and an output shaft of the motor is connected with the threaded rods. The upper ends of the threaded rods are rotationally inserted into the corners of the supporting frame through bearings, the upper ends of the threaded rods are fixedly sleeved with synchronous wheels, and the four synchronous wheels are in transmission connection through a synchronous belt, so that all-directional protection on a machining area can be achieved in the machining process, the splashing phenomenon of cooling liquid is fully avoided, and the surrounding environment is cleaner.

The invention relates to the technical field of mold machining, and discloses a workpiece processing method, device and equipment and a medium. The method comprises the steps that a discharge plan is obtained, and the electrode number of each discharge electrode in each electrode set needing to be used in the discharge plan is determined; according to the numbers of all the electrodes, determining fine discharge electrodes in each electrode group and the number of the fine discharge electrodes, and according to the number of the electrodes, detecting whether the fine discharge electrodes needing segment reservation exist in each electrode group or not; when it is detected that a fine discharge electrode needing segment reservation exists in at least one electrode set, program updating is conducted on the discharge equipment according to the type of the discharge equipment, and an updating program corresponding to the discharge equipment is obtained; and processing the workpiece to be processed according to the update program corresponding to the discharge equipment associated with all the fine discharge electrodes reserved at the required segment position to obtain a target workpiece. According to the method, segment reservation is added in the discharge plan, so that the discharge program is updated, and the discharge machining efficiency is improved.