90 results about "Electrodischarge machining" patented technology

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 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.

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.

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).

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.

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.

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.

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.

One embodiment of the electrical discharge machining (EDM) machine (10) includes: a pump (52) for supplying liquid; and an inlet pipe (54) for introducing the liquid supplied by the pump (52) into a machining tank (46). The inlet pipe (54) has a pipe section (54PT) higher than the maximum allowable water level height of the machining tank (46). A through hole (54H) is provided in the pipe section (54PT) through the pipe wall of the inlet pipe (54).

The invention relates to an abnormal discharge current detection method and device for electric spark discharge machining, and is applied to the technical field of discharge machining. A direct current-direct current power supply module is adopted as a current detection core element, has a stable voltage output characteristic and is sensitive to current fluctuation response, and a traditional Hall sensor is replaced; the problem of high-precision detection of small current in a strong electromagnetic interference environment is successfully solved; on the basis of current rising edge characteristic differences of abnormal discharge and normal discharge, two key time points are selected for voltage comparison, abnormal states such as excessive arc, arc, short circuit and micro open circuit can be accurately distinguished, and missed judgment and misjudgment are avoided; a reference value lookup table corresponding to different peak currents is established through experimental calibration to adapt to various medium and finish machining parameter scenes; and the detection branch adopts the design of an isolation diode and a current-limiting resistor, and is matched with pulse-type intermittent measurement of a controlled switch tube, so that shunting interference on a main discharge loop is avoided, and the stability of the processing process is ensured.

The invention relates to apparatus and a method for use in creating a machining or polishing effect on a surface of an article located with respect to said apparatus, said apparatus including at least one electrode assembly including a base or plate and at least one deformable portion which is relatively moveable in response to contact being made with a surface of the said article so as to substantially take the shape profile impression of said surface of said article. This allows closer and contact across the said surface with the electrode assembly and hence allows improved granularity and quality of polishing or machining of said surface.

To provide a long electrode wire for wire electric discharge machining having high quality over the whole length, and a quality control method of the electrode wire for wire electric discharge machining for obtaining the electrode wire for wire electric discharge machining.SOLUTION: The wire 2 for wire electric discharge machining has a length of 200km or more, a standard deviation of diameters in the longitudinal direction of 0.29 μm or less over the entire length, and a roundness of 1.0 μm or less.SELECTED DRAWING: Figure 3

The invention belongs to the technical field of electric discharge machines, and particularly relates to an efficient electric discharge machining machine which comprises a machine tool, a water tank installed on the machine tool, a machining machine body, a lifting mechanism installed on the machining machine body, an electric discharge machine head connected with the lifting mechanism and provided with an electrode, and a motor connected with the electric discharge machine head. The processing table is fixedly mounted in the water tank; the protective cover is mounted on the machining table; a round hole is formed in the top of the protective cover; a flushing mechanism is mounted in the protective cover; the flushing mechanism comprises an air bag and a flushing pipe communicated with the air bag; an extrusion mechanism is further installed in the protective cover, when the discharge machine head ascends, the air bag is extruded through the extrusion mechanism, and the water outlet amount and the water outlet pressure of the flushing pipe are increased; pressurizing and pressure releasing of the flushing mechanism are automatically triggered through lifting motion of the discharging machine head, dynamic adjustment of the flushing amount and pressure is achieved, and the problems that electrode loss is too fast due to the fact that the flushing amount is too large, and chippings in holes are not thoroughly cleaned when the flushing amount is too small are solved.

The invention belongs to the field of non-traditional machining, and particularly provides an electrochemical discharge machining surface pre-contact detection method and system. According to the method, vibration signals are collected through an acceleration sensor installed on a motor main shaft, filtered and then input into a trained mathematical model, and whether the bottom of a tool electrode makes pre-contact with the to-be-machined surface of a workpiece or not is judged. The system comprises an execution system and a detection control system, vibration signals and machining parameters are fused through a neural network model, and interelectrode gap changes are monitored in real time. And when it is detected that the bottom of the tool electrode makes pre-contact with the to-be-machined surface of the workpiece, the feeding rate of the tool electrode is adjusted through a machine tool controller so as to maintain the constant interelectrode gap, bending or breakage of the tool electrode is avoided, and the machining stability and the material removal rate are improved.

The present application discloses a conductive high-strength diamond / amorphous carbon composite material and a preparation process thereof. The diamond / amorphous carbon composite material is composed of an amorphous carbon continuous phase and multiple separate diamond phases embedded in the amorphous carbon continuous phase, wherein the diamond phases exhibit an ordered sp3 hybrid state, and the amorphous carbon continuous phase exhibits a disordered sp2 hybrid state. The present application further discloses a process for preparing the above diamond / amorphous carbon composite material. The process comprises using sp3 carbon powder or glassy carbon as a raw material to obtain the above-mentioned material by sintering. The diamond / amorphous carbon composite material shows good electrical conductivity, good electrical discharge machining ability, good chemical stability and light weight, and has broad application prospects in aerospace, automobile industry and biomedical equipment.

The application belongs to the technical field of special processing, and discloses a high-radiation underwater non-contact discharge processing method and device. The method sets a processing workpiece and configures a processing electrode system in a high-radiation underwater environment, establishes a discharge channel, carries out etching processing on the processing workpiece, collects physical signals in the etching processing process and generates intermediate data, introduces a water medium suspension containing nanoparticles, dynamically controls the gap of the discharge channel to maintain constant, transmits the intermediate data to a remote monitoring platform through a high-radiation shielding communication link, and the remote monitoring platform evaluates the stability of the discharge channel based on the intermediate data and generates a correction instruction. The device comprises a processing electrode system, a pulse power supply system, an integrated sensing system, a nano-suspension system, a feedback controller and a remote monitoring platform. The application provides real-time monitoring and data support for the processing process and improves the processing quality and efficiency.

The present invention relates to a method of processing for an electrical discharge machining machine. A method for generating a cavity model to be applied to a part machined by an electrical discharge machining machine (EDM) using a tool electrode, the method comprising: a. generating a pre-EDM part model defining the geometry of a part to be eroded by the EDM machine to obtain a final part; b. generating an electrode model defining the geometry of an electrode electrode to be applied to erode the part; c. determining a cavity model defining the geometry of a cavity representing the volume of material to be eroded by the electrode based on the pre-EDM part model and the electrode model.

The invention belongs to the technical field of non-traditional machining, and discloses a high-radiation underwater non-contact electric discharge machining method and device.According to the method, in a high-radiation underwater environment, a machined workpiece is arranged, a machining electrode system is configured, an electric discharge channel is established, and the machined workpiece is subjected to corrosion removal machining; the method comprises the following steps: collecting a physical signal in an etching processing process, generating middleware data, introducing an aqueous medium suspension containing nanoparticles, dynamically regulating and controlling a gap of a discharge channel to maintain constant, and transmitting the middleware data to a remote monitoring platform through a high-radiation shielding communication link, the remote monitoring platform performs quality evaluation on the stability of the discharge channel based on the middleware data and generates a correction instruction, and the device comprises a processing electrode system, a pulse power supply system, an integrated sensing system, a nano suspension system, a feedback controller and the remote monitoring platform. Real-time monitoring and data support are provided for the machining process, and the machining quality and efficiency are improved.

An electrical discharge machining device (1A) is provided with: a power supply device (20) that supplies power to a machining gap between a tool electrode (4) and a workpiece (3); a current detection unit (9) that detects an inter-electrode current value, which is the current value of the current flowing from the power supply device to the machining inter-electrode; a voltage command detection unit (12) that detects an applied voltage value, which is a command value for the voltage value of the voltage applied between the machining electrodes; and a calculation device (10A) that acquires the inter-electrode current value and the applied voltage value, and estimates the electrical characteristics from the inter-electrode current value and the applied voltage value using a learning model for estimating the electrical characteristics inherent to the device from the inter-electrode current value and the applied voltage value. A correction value for correcting the inter-electrode current value and the applied voltage value is determined such that the estimated electrical characteristic is a reference electrical characteristic.

In some embodiments, the distal end of the endodontic brush is uneven (e.g., not along a line perpendicular to the axis of the brush). Optionally, the uneven strands will contact the walls of the canal more evenly and / or will have an increased agitation effect compared to a uniformly cut end that can be cut with an abrasive cutter (e.g., a grinding wheel) and / or a laser cutter and / or an electrical discharge machining (EDM) cutter. Optionally, the grinding wheel will rotate counter to the winding of the line. Optionally, a rounded end can be formed on the line. In some embodiments, the coupling between the endodontic brush and the handpiece is configured to be rotatably retained to the handpiece by friction and / or to be longitudinally locked into the handpiece by interference elements. In some embodiments, the edge of the brush is roughened. Optionally, the brush can be curved and / or off-center.

The multi-stage liquid level device comprises a device machine head, a bottom plate and a machining pool, the machining pool comprises the bottom plate, a fixed cover, a first-stage lifting cover and a second-stage lifting cover, the fixed cover is arranged on the top face of the bottom plate, the first-stage lifting cover is vertically arranged on the inner side of the fixed cover in a sliding mode, and the second-stage lifting cover is arranged on the inner side of the fixed cover in a sliding mode. The second-stage lifting cover is vertically arranged on the inner side of the first-stage lifting cover in a sliding mode, a first lifting inner cavity is formed between the fixed cover and the first-stage lifting cover, a second lifting inner cavity is formed between the first-stage lifting cover and the second-stage lifting cover, and a first air conveying through pipe communicated with the first lifting inner cavity is arranged on the fixed cover in a communicating mode; the first-stage lifting cover is provided with a second gas transmission through pipe communicating with the second lifting inner cavity in a communicating mode, and the first gas transmission through pipe and the second gas transmission through pipe both communicate with a gas source. The wire cutting machine has the effect of expanding the application range.

The present invention relates to an electro-discharge machining device, which comprises at least a carrier and an electro-discharge machining unit. The carrier is used to carry at least one workpiece to be machined. The electro-discharge machining unit comprises an electrode, a jig and a power supply unit. When the electro-discharge machining unit performs an electro-discharge machining process on a machining target area of the workpiece to be machined along a machining travel direction, a discharge section of the electrode moves relative to the machining target area of the workpiece to be machined. The present invention can improve the machining process, save the overall machining time and save the time required for replacing the electrode.

The invention relates to the technical field of non-traditional machining, and discloses an array integrated electrode electrochemical discharge machining method for a glass substrate through hole, and the method comprises the following steps: immersing a glass workpiece in a non-Newtonian fluid electrolyte with a shear thinning characteristic; an adjustable positive and negative bipolar pulse power supply is used for applying voltage to the array integrated electrode, so that the two electrodes are alternately gassed to form a gas layer and generate electrochemical discharge; a damping environment is constructed by utilizing rheological characteristics of an electrolyte, bubble resistance is increased to inhibit fluctuation of a gas layer, and discrete bubbles are restrained to backfill and repair the gas layer; and controlling electrode feeding, and removing the material through high-temperature melting and chemical etching to form the through hole. The gas layer stability is improved through non-Newtonian fluid damping constraint, and equal-loss and equal-energy electrochemical discharge of the electrode is realized in cooperation with a polarity alternating mechanism, so that the high-aspect-ratio and high-precision glass through hole is obtained, and the machining continuity and stability are improved.

A wire electric discharge machining device according to an aspect of the present disclosure is for electric discharge machining of an aluminum-based material, wherein a machining fluid used in electric discharge machining contains at least one kind of cation from among potassium ions, calcium ions, sodium ions and magnesium ions and at least one kind of anion from among sulfate ions, sulfite ions, disulfite ions, hydrogen sulfite ions, hydroxide ions, nitrate ions and nitrite ions.

A wire electrical discharge machining equipment for different workpiece heights comprises a wire electrode, a machining detecting device and a controller. The wire electrode has an electrode length and is configured to machine a workpiece. The machining detecting device is configured to detect and obtain a machining parameter set of the wire electrode while machining the workpiece. Wherein, the machining parameter set comprises a discharge frequency, a working voltage and a discharge parameter, and the discharge parameter is corresponding to a material removal amount. The controller is connected to the wire electrode and the machining detecting device. The controller is configured to compute a workpiece height of the workpiece according to the discharge frequency and the working voltage, and compute a machining feed rate according to the workpiece height and the material removal amount. The controller is configured to adjust the electrode length to the workpiece height and controls the wire electrode to machine the workpiece with the machining feed rate.

The invention relates to the technical field of metal material precision machining, in particular to a thin-wall special-shaped high-temperature alloy GH4141 part machining method. The part is an arc-shaped plate, and a plurality of protrusions and grooves are arranged in the middle of the part. Comprising the following steps that a GH4141 plate is taken as a stock plate and used for machining a plurality of parts; a process table is selected according to the arc-shaped bending direction of the part; performing electric discharge machining on the upper and lower surfaces between the process tables on the upper and two sides of the single blank; the discharge machining is carried out at least twice, so that the allowance of the machining surface of a single blank is 0.5 mm; a pressing plate is used for clamping the process table, and a five-axis machine tool is used for machining; the arc-shaped concave surface of the single blank is firstly machined, and then the arc-shaped convex surface of the single blank is machined; and the two process tables are cut off, and the part is obtained after deburring and chamfering. According to the method, thermal deformation of the GH4141 high-temperature alloy thin-wall part in the machining process can be effectively reduced, and the form and position precision and the machining stability of the part are improved.

This invention belongs to the field of electrical discharge machining (EDM) technology, aiming to solve the technical problems of existing technologies where the medium transmission pressure and filtration rate cannot be automatically adjusted, and the filter residue cannot be quickly discharged. Based on this, a high-efficiency EDM working medium filtration device is provided, including a storage tank detachably mounted on the lower end of the filter seat. The filter seat has an inlet and an outlet on its side wall. A piston cavity is formed inside the filter seat, and a piston sleeve is slidably fitted inside the piston cavity. The outer wall of the piston sleeve is slidably sealed to the inner wall of the piston cavity. Several outlet holes are formed on the inner wall of the piston sleeve, and a through-flue is formed between the outlet holes and the outlet, connecting them. A disc-shaped guide groove is fitted at the upper end of the storage tank. The high-efficiency EDM working medium filtration device of this invention has the advantages of automatically adjusting the medium transmission pressure and convenient filter residue discharge.

The invention relates to a method for machining a multi-material workpiece by electrical discharge machining, the workpiece comprising at least two different phases. The machining process is performed by applying discrete pulses to the gap between the electrode and the multi-material workpiece. An ignition voltage is applied to the gap to cause dielectric breakdown, and then a discharge current pulse is applied to cause material removal or material remelting. At least two different phases of the multi-material workpiece are machined in the same machining operation, and the different phases of the multi-material workpiece at which a current discharge occurs are identified in real time based on monitored process signals that are stable at or after a dielectric breakdown. At least one pulse parameter setting of the current discharge current pulse is adjusted based on the identified different phases of the multi-material workpiece.