185 results about "Electrochemical machining" patented technology

The present invention relates to a method and device for electrolytic machining with self - controllable deformation of a shape memory alloy electrode, belonging to the technical field of electrolytic machining. This method uses a shape memory alloy as the electrode material and the initial part profile line as the electrode shape. Through heat treatment, the electrode corresponds to different part profile line shapes at different temperatures. During electrolytic machining, the electrode is connected to a floating fixture, and the temperature of the electrolyte is regulated by the equipment to cause corresponding deformation at different positions. After the machining is completed, using the shape memory effect of the material, the electrode is heated to restore its shape. This method can not only achieve the machining of variable cross - sections but also reuse the electrode.

The invention discloses a precise electrolytic machining method for a herringbone groove microstructure of an air floatation kinematic pair, which comprises the following steps: machining a workpiece by adopting a profiling cathode with a convex structure complementary with a target herringbone groove on the surface, and connecting the workpiece with an anode assembly; the convex structure is a processing area, and an insulating coating is arranged on the surface of a non-processing area except the convex structure; the processing pulse of the power supply system is started at the liquid supply closing stage of the electrolyte system, and the processing pulse of the power supply system is stopped and the electrolyte is updated at the liquid supply opening stage of the electrolyte system. High-precision, low-cost and high-efficiency machining of the herringbone groove microstructure is achieved through profiling cathode shaping, group pulse precise etching and intermittent liquid supply and deslagging, and the problems of stray corrosion control, groove depth gradual change uniformity and batch consistency in electrolytic machining are solved.

The present invention discloses a multi-stage blade disk multi-blade sleeve type electrolytic machining mechanism and method, belonging to the field of electrolytic machining. Connecting rods and cross bits are designed to convert the one-dimensional rotational motion of the main drive shaft into the feed motion of the multi-stage cathode, so as to realize the simultaneous electrolytic machining of multi-stage blades, improve the efficiency of electrolytic machining, and shorten the machining cycle of the overall component. Limiting rings and limiting blocks are designed to realize the centripetal feed motion of the cathode part of each level of tool. According to the characteristics of the blades, by adjusting the inner contour of the cathode, the inner contour of the insulating water jacket, the installation position of the mounting rod on the disc, the position and radial length of the radial limiting groove and other parameters, the simultaneous electrolytic machining of two-stage blades with different characteristics is realized.

The present invention relates to a closed - type blade - ring screwed - in cascade - channel electrochemical machining device and method, belonging to the field of electrochemical machining. The device mainly includes a support disk, a workpiece, an insulating gasket disk, a tailstock, a cathode rod, a cathode head, etc. During machining, the cathode remains fixed, and the workpiece rotates and feeds along an arc - shaped trajectory in the axial direction of the blade, gradually machining the cascade channel into shape. A group - slit structure is arranged on the cathode head to ensure sufficient supply of electrolyte to the machining area. A reverse - flow groove is arranged on the insulating gasket disk, so that when the cascade channel is about to be machined through, the electrolyte will not disperse, but under the action of the reverse - flow groove, it will be flushed back to the machining area, preventing liquid shortage and ensuring machining stability.

The application discloses a blisk cascade deforming radial feeding electrolytic machining tool and relates to the technical field of electrolytic machining. The bottom base has a supporting function; the cathode connecting rod comprises a plurality of cathode blocks which are sequentially hinged; one of the cathode blocks is fixedly connected with the bottom base, and corresponding grooves or holes are arranged on each of the cathode blocks; the strip-shaped object has the ability of deforming and resisting deformation; and the strip-shaped object is arranged in all the grooves or holes. The blisk cascade deforming radial feeding electrolytic machining tool can realize the controllable deformation of the cathode blades on the cathode connecting rod in a spline curve, thereby adapting to the machining requirements of the shape of the twisted blade blisk cascade channel, and improving the machining precision. In addition, the application is suitable for the radial feeding electrolytic machining of the twisted blade blisk and can also be used for machining components with twisted channel structure characteristics, such as closed blade rings, and has universality.

The present invention belongs to the technical field of electrochemical machining, and particularly relates to a design method for the cathode profile of an all-metal oil screw drill stator by electrochemical machining. The contour curve of the cathode profile is designed into a dot matrix according to unequal gaps, so as to obtain the control points, order and knot vector of the contour curve, construct operators, and use integral spline operators to control the global shape of the contour curve to achieve rough fitting of the cathode contour; when the square curvature of the cathode contour curve is the smallest relative to the integral of its arc length, the curvature of the curve is the most uniform. A fitting index for the cathode contour curve is constructed, and the discrete curvature at each point of the cathode contour curve is calculated in turn to achieve precise fitting of the cathode contour curve, and the error can be controlled within the accuracy range of 0.002 mm; the "B-τ" spline inner contour integration method is used to design the cathode profile of the all-metal oil screw drill stator. The present invention has the advantages of short cathode design cycle, high forming accuracy, and significantly reduced cathode manufacturing cost.

The application discloses a machine vision controlled block electrode self-adjusting electrolytic machining device and method, relates to the field of electrolytic machining, and electrolytic machining is divided into preforming electrolytic machining and block compensation electrolytic machining; the preforming electrolytic machining stage is a stage of electrolytic machining in which a whole forming tool cathode is used as a cathode to work on a workpiece at a constant feed speed, the stage is used for primarily copying and forming the workpiece, and then the block compensation electrolytic machining stage is started; the block compensation electrolytic machining stage is used for dividing the machining area into zones, capturing image information of electrolytic machining of the workpiece and block electrodes by machine vision, analyzing and processing the block zones, obtaining actual machining gaps of the block zones, comparing and calculating the actual machining gaps with corresponding target values, and then sending instructions to a movement execution system to control specified block electrodes to perform compensation electrolytic machining, so that machining errors caused by fluctuations in conductivity along the way are eliminated, and finally, electrolytic copying and forming machining with higher machining precision is realized in the long process of the distorted workpiece.

The application relates to a device and method for electrostatic induction and sound surface wave mask electrolytic machining, belonging to the electrolytic machining field. The pump, the liquid storage tank and the electrolytic tank are connected to realize electrolyte circulation. The various components in the electrolytic tank are riveted. The anode and cathode assemblies and the shielding induction electrode assembly are inserted into the electrolytic tank. The positive and negative poles of the power supply are connected with the anode and cathode plates in the anode and cathode assemblies respectively, and the workpiece arranged in the induction electrode assembly is arranged in the electric field between the anode and cathode plates. The piezoelectric ceramic is attached to the base plate of the induction electrode assembly, and the signal generator and the power amplifier are connected with the piezoelectric ceramic. Based on the device, the piezoelectric ceramic is connected with a megasonic driving voltage to generate a surface wave on the surface of the workpiece; the anode and cathode plates are connected with direct current, and the workpiece is arranged in the electric field formed by the anode and cathode plates, so that the surface to be machined of the workpiece is subjected to oxidation reaction, and the non-machining surface is subjected to reduction reaction, thereby realizing wireless induction machining of the workpiece. The application has the advantages of simple operation, re-distribution of the electric field, enhancement of mass transfer, improvement of mask electrolytic machining precision, arrangement of multiple workpieces in the electric field formed by the anode and cathode plates, and substantial improvement of mask electrolytic machining efficiency.

The invention relates to the technical field of electrochemical machining and manufacturing, in particular to a device for electrochemically removing edge burrs in batches. The problems that in the prior art, various complex parts cannot be machined at the same time, the cathode installation efficiency is low, and a flow field is unstable and uneven are solved. According to the technical scheme, the device comprises a flow guide device, a flow guide fixing plate, an air pressure adjusting device and a cathode and anode conductive device; three stages of communicated flow guide cavities are formed in the flow guide device from bottom to top, a flow guide fixing plate is arranged above the flow guide device, and a workpiece and the flow guide device are fixed through the flow guide fixing plate; air pressure adjusting devices with the same number as the workpieces are uniformly distributed above the flow guide fixing plate along the circumference; a cathode assembly is arranged above the air pressure adjusting device, an anode conductive device is arranged between the air pressure adjusting device and the cathode assembly, the number of anode conductive columns on the anode conductive device is the same as that of workpieces, and the anode conductive columns correspondingly penetrate through the cathode assembly and holes in the corresponding air pressure adjusting device to be connected with the workpieces.

A near-atomic-scale electrolytic machining method based on an interface self-assembly biomask comprises the steps that firstly, hydroxylation pretreatment is conducted on the surface of an anode of a workpiece, then the surface of the anode is covered with an organic solvent phase containing phospholipid monomers, water-phase electrolyte drops are introduced, molecular self-assembly driving force at an oil-water-metal three-phase interface is utilized, and the surface of the anode of the workpiece is subjected to near-atomic-scale electrochemical machining. And rapidly forming a layer of ultrathin, continuous and stable support phospholipid bilayer mask on the surface of the workpiece in situ. Then, biological nanochannels are embedded in the biomimetic mask to construct a confinement ion transport path. And finally, a precise pulse electric field is applied, electrolyte ions are driven to be strictly limited in the nanometer channel and transmitted to the surface of the workpiece, local anodic dissolution is triggered, and therefore localized material removal of the nanometer scale or even the near-atomic scale is achieved. According to the method, the technical bottleneck that the high-quality phospholipid bilayer is difficult to prepare on the high-surface-energy metal surface is solved, and a new way is provided for ultra-precision electrolytic machining.

The present invention discloses a closed-component electrochemical machining device and method, belonging to the field of electrochemical machining. The fixture is divided into a blade pressure surface cathode fixture and a blade suction surface cathode fixture. Each fixture is provided with a main liquid supply flow channel inlet, two auxiliary liquid supply flow channels, and two liquid sealing supply / air flow channels. The blade suction surface cathode fixture, the blade pressure surface cathode fixture, the closed component, and the electrolyte / gas ejected from the liquid sealing supply / air flow channel form a closed flow field mode in which the electrolyte in each flow channel is independently controlled. The present invention improves the uniformity and stability of the flow field in the machining area, and realizes the simultaneous machining of the internal and external flow channels and the blade profile of closed components such as rectifiers and stator vane rings; the integrated fixture is convenient for clamping and improves the electrochemical machining efficiency.

The utility model discloses an abrasive particle jet electrochemical small hole machining device for promoting horizontal vibration of a workpiece through megasonic. The abrasive particle jet electrochemical small hole machining device is mainly composed of a movable platform, a connecting plate, a machining head clamp, an electrochemical machining head, an anode workpiece, an anode supporting device, an electrolyte tank, a liquid supply system and a megasonic auxiliary system. The connecting plate is positioned below the movable platform and is in threaded connection with the movable platform; the processing head clamp is positioned below the connecting plate and is in threaded connection with the connecting plate; the electrochemical machining head is positioned below the machining head clamp and is in threaded connection with the machining head clamp; the electrolyte tank is located below the machining head, and the anode supporting device is bonded to the center of the electrolyte tank. An anode workpiece is clamped and fixed above the anode supporting device; the liquid supply system is positioned on the left of the anode support device; the megasonic auxiliary system is located on the right side of the anode supporting device. The utility model has the advantages that the processing quality and the processing efficiency can be effectively improved, and the operation is simple.

The present invention discloses a laser interference and electrolysis collaborative processing system and a high aspect ratio micro-nano hole processing method, comprising a laser, an interference optical path system and an electrochemical processing system; the laser is used to generate and output a laser beam of specific power and frequency; the interference optical path system comprises a beam splitter, a half-wave plate, a polarizer, and a high-reflection mirror, the laser beam generated by the laser is split into at least two beams by the beam splitter, each laser beam is transmitted to the processed workpiece through the polarizer, half-wave plate and high-reflection mirror, forming a specific interference light field; the electrochemical processing system comprises a pulse power supply, an electrolyte and an electrolytic cell, the processed workpiece serves as an anode connected to the positive electrode of the pulse power supply, and transparent conductive glass serves as a cathode connected to the negative electrode of the pulse power supply, the processed workpiece and the transparent conductive glass are both located in the electrolyte of the electrolytic cell, and the gap between the transparent conductive glass and the processed workpiece ranges from 0.01 to 5 mm; the present invention provides new ideas and solutions for the manufacture of new structural and functional integrated materials.

The invention discloses a passive bipolar movable mask electrochemical machining device and method for a workpiece. The device comprises a power supply control system, an electrochemical machining system, a motion control system and an electrolyte circulating system, the electrochemical machining system is provided with a first electrochemical machining tank and a second electrochemical machining tank which are oppositely arranged, two electrodes are arranged in each electrochemical machining tank, and two movable masks are pressed and attached to the two faces of a workpiece to form a mask structure. The motion control system drives the two grooves to be closed or separated; the electrolyte circulating system forms flushing and sucking liquid circulation facing the surface of a workpiece through a flushing pipe and a liquid sucking pipe; the power supply control system intermittently switches the polarities of the two electrodes, so that charge distribution on the two sides of the workpiece is alternately changed, and passive bipolar electrochemical machining is realized; according to the method, photoresist is replaced by the movable mask, the process is simplified, the efficient liquid flushing and absorbing mode and the electrostatic induction machining mode are combined, the inter-electrode mass transfer and electric field uniformity are remarkably improved, and the machining efficiency, precision and depth-diameter ratio are improved.

The invention relates to the technical field of electrochemical machining, in particular to a multi-layer array fiber cluster flexible electrode and a complex runner electrochemical polishing method thereof.The multi-layer array fiber cluster flexible electrode is of a multi-layer composite structure and sequentially comprises an insulating layer, conductive metal wire clusters arranged in an array mode and a flexible mold core from outside to inside; the insulating layer is in a bamboo joint shape or is processed with an array groove structure, and the conductive metal wire cluster is formed by bundling a plurality of flexible metal filaments and is arranged in a close array along the outline of the flexible mold core; the multi-layer array fiber cluster flexible electrode solves the problems that a traditional rigid electrode cannot adapt to a bent flow channel, a simple flexible electrode cannot keep a uniform and stable machining gap between the simple flexible electrode and the wall face of a special-shaped flow channel, uneven distribution of an electric field and a flow field in the gap is easily caused, local over-corrosion or incomplete polishing is caused, and the service life of the flexible electrode is prolonged. And a high-uniformity global polishing effect cannot be realized.

This invention relates to a non-contact, low-temperature, intermittent heat exchange pulsed-dynamic electrolytic machining apparatus and method, belonging to the field of electrolytic machining. The apparatus consists of a blade workpiece, a cathode plate, a cathode holder, and an insulating sleeve. The cathode plate undergoes high-frequency reciprocating vibration during radial feeding, coordinated with the synchronous switching of a pulse power supply, to achieve pulsed-dynamic electrolytic machining. In this pulsed-dynamic electrolytic machining method, the cooling medium flows into the insulating sleeve from the inlet of the cooling channel, flows through the cooling channel, and then flows out from the outlet of the cooling channel, reducing the temperature inside the insulating cavity. As the blade is shaped and enters the insulating cavity, the cooling medium undergoes convective intermittent heat exchange with the stray electrolyte within the cooling channel, reducing the temperature and conductivity of the stray electrolyte, and even freezing the stray electrolyte, creating a low-temperature environment around the shaped blade and inhibiting the electrolytic reaction in the stray corrosion zone. Pulsed-dynamic machining promotes the removal of electrolytic products and heat, further improving machining accuracy and surface quality.

The invention discloses an ion channel protein near-atomic scale confinement dissolution electrochemical machining method based on a bionic confinement interface. The method is characterized in that a bionic phospholipid bilayer mask is spread on a workpiece anode to shield a non-processing area, ion channel protein is embedded into the bionic phospholipid bilayer mask to serve as an electrolyte channel, and when the bionic phospholipid bilayer mask is powered on, the anode dissolution reaction is strictly limited in the ion channel protein channel. Millivolt-level picosecond-nanosecond pulse voltage or current is adopted on the time scale so that anode metal atoms can be removed one by one, electrolytic products are discharged in the modes of electrolyte adjustment, microcosmic acting force, micro vibration and the like so as to ensure sustainable generation of electrochemical reaction, and therefore near-atomic-scale electrolytic machining is achieved. The electrochemical machining technology and the biological field are fused in an interdisciplinary mode, the near-atomic-scale electrochemical dissolution reaction space is constructed, the capacity of electrochemical machining for removing materials in an ion form is approached, and near-atomic-scale electrochemical machining is achieved.

The invention relates to the technical field of electrochemical machining, in particular to a deep and long variable cross-section shielding inner cavity electrochemical machining method which comprises the steps that a deep and long shielding reducing inner cavity single-blade electrode is designed according to the shape of a deep and long variable cross-section shielding inner cavity; the electrochemical machining process is divided into three stages according to the requirement for stable machining gap control under the condition of large-allowance removal deformation control of the deep and long variable-diameter shielding inner cavity and by combining the characteristic that machining gaps of all parts on the surface of the deep and long variable-cross-section shielding inner cavity are different through a single-blade electrode, and different machining modes are adopted in the different machining stages; wherein in the first stage, electrolytic machining reaches a dynamic equilibrium state, in the second stage, the problem of machining gap change caused by stress release deformation in a workpiece is solved through self-adaptive machining, stable electrolytic machining removal of a large number of materials is achieved, and in the third stage, double-Z-axis synchronous feeding of an electrode is driven by a motor, and long-stroke small-gap stable and accurate machining is achieved.

The invention provides a single-crystal high-temperature alloy surface microstructure construction method, and relates to the field of electromachining. According to the method, based on the electrochemical machining principle, the surface appearance is accurately regulated and controlled by optimizing electrolyte components and process parameters and utilizing the difference of gamma phase and gamma'phase electrochemical dissolution behaviors. The method specifically comprises the following steps: in an ethylene glycol solution dissolved with halide salt, preferentially dissolving a gamma'phase to form a latticed surface; in an ethylene glycol solution in which oxyacid salt is dissolved, the gamma phase is deeply dissolved to form a columnar surface. Optimized current density processing parameters are adopted, so that the dissolution uniformity and the structural stability are further improved. In addition, a scanning electron microscope (SEM) is used for carrying out characterization verification on the surface appearance and the microstructure after dissolution. According to the technology, precise preparation of the high-quality surface interface of the single-crystal high-temperature alloy is achieved, and an innovative solution is provided for surface function optimization of high-performance parts such as turbine blades.

The invention provides a double-liquid-tank type electric spark electrolysis ultrasonic combined machining machine tool which is characterized in that a workbench is fixed on a machine body, and an electric spark machining head and an electrolytic machining head which are used for machining a workpiece are arranged on the machine body; the first machining fluid tank and the second machining fluid tank are arranged on the base in a reciprocating mode in the horizontal direction and the vertical direction, and when the first machining fluid tank and the second machining fluid tank horizontally move to the machining position and vertically ascend and descend, the workbench can be allowed to stretch into the first machining fluid tank and the second machining fluid tank. When the working table extends into the first machining liquid tank or the second machining liquid tank, the working table serves as the tank bottom of the first machining liquid tank or the second machining liquid tank to define a machining tank structure, and electrolyte or electric spark machining liquid capable of completely immersing a workpiece can be reserved in the machining tank structure. Rapid switching between a to-be-machined position and a machining position can be achieved, different machining procedures can be connected without re-clamping of a workpiece, the time for halting for workpiece replacement and positioning calibration is shortened, and the production efficiency is improved.

Disclosed are a method for improving a surface quality of an alloy micro-area via a supersaturated film and use thereof. The method includes: adding nickel chloride to a sodium chloride-ethylene glycol electrolyte until the electrolyte is saturated, and conducting electrochemical machining.

The application discloses a kind of complex structure parts electrochemical mechanical polishing equipment based on carrier liquid micro-particle electrolyte, including mechanical vibration mechanism and multi-degree-of-freedom transmission mechanism on base, and mechanical vibration mechanism is equipped with electrochemical processing mechanism between multi-degree-of-freedom transmission mechanism top, electrochemical processing mechanism is connected with liquid storage tank by temperature and humidity adjusting mechanism;Preloaded with carrier liquid micro-particle electrolyte in electrolytic cell, workpiece is clamped by pneumatic metal clamp, under the driving of multi-degree-of-freedom transmission mechanism, workpiece is contacted with carrier liquid micro-particle electrolyte in electrolytic cell all-around movement, simultaneously, voltage is applied by direct-current power supply, and the current loop of connection power supply positive pole, anode workpiece, electrolyte particle, cathode electrolytic cell and power supply negative pole is formed, during electrification process, workpiece surface is formed softened metal oxide film under the electrochemical action of carrier liquid micro-particle electrolyte;Workpiece is contacted with carrier liquid micro-particle in electrolytic cell by mechanical vibration mechanism and is vibrated, and the relative friction of multi-degree-of-freedom movement is generated, and the mechanical removal of surface oxide film is realized, and the electrochemical and mechanical circulation in polishing process is promoted, and the polishing efficiency is improved, and the machining accessibility of complex structure part polishing is good;It has the advantages of high efficiency, good polishing effect, simple operation and low cost.

This application relates to an electrochemical machining apparatus, control method, equipment, and storage medium. The electrochemical machining apparatus includes a main flow channel and a secondary flow channel, which are respectively located on opposite sides of the workpiece and flow through each other with electrolyte. The main flow channel includes a machining zone for electrochemical machining of the workpiece. The secondary flow channel includes a flexible support zone for providing flexible support to the machining zone, and the electrolyte pressure in the flexible support zone counteracts the electrolyte pressure in the machining zone. This application can avoid elastic deformation of the machining zone caused by the thinning of the material thickness in the machining area during electrochemical machining of thin-walled workpieces under high electrolyte pressure conditions, and avoids machining errors, thereby improving machining accuracy.

The invention provides a device (10) for producing a profiling on an inner wall of a projectile-guiding tube (12) by means of electrochemical machining, comprising a holder (20) which is intended for a projectile-guiding tube (12) and has, at two opposite ends, opposing centring elements (22) with a receptacle (24) for the tube (12) to be machined, and comprising a rifling cathode (18), which can be moved through the tube (12) to be machined, wherein at least one centring element (22) is axially adjoined by a guide body (28) which is intended for the cathode (18) and has a central clearance (30) concentric with the receptacle (24), wherein the rifling cathode (18) is driven in such a way that it can be moved into the guide body (28). The invention also provides a method for producing a profiling on an inner wall of a projectile-guiding tube (12) by means of electrochemical machining.

The invention provides a variable-radius electrode and a pulse dynamic electrochemical polishing method for an inner channel, and belongs to the field of electrochemical machining. The variable radius electrode is composed of a dielectric material elastic driving body, a flexible insulation hinge and a cathode block. Wherein the elastic driving body is a cylinder formed by curling two layers of dielectric materials and a middle rigid reinforced fiber plate, and when pulse voltage is applied, the elastic driving body can generate axial periodic telescopic motion; flexible insulation hinges are connected to the upper end and the lower end of the elastic driving body, a plurality of cathode blocks are fixed between the flexible insulation hinges in the circumferential direction, the axial periodic telescopic motion of the elastic driving body can be converted into the radial periodic reciprocating motion of the cathode blocks, and the radius of the electrode is made to generate periodic pulsation change. In the machining process, the electrode moves in the channel under traction of the traction wire, the radius change period of the electrode is coupled with the pulse power-on period, power-on machining is conducted when the radius becomes large, power-off washing is conducted when the radius becomes small, and pulse dynamic electrochemical polishing of the complex inner channel is achieved.

The present invention discloses a large aspect ratio straight-grain blade sleeve electrochemical machining device, comprising a workpiece fixture, a cathode assembly, a positioning block and a liquid supply assembly. The cathode assembly and the workpiece fixture are arranged to be relatively movably in a first direction. The cathode assembly comprises a cathode sheet, which is provided with a first profiling hole. The cathode assembly defines a liquid supply channel connected to the first profiling hole, and a first profiling opening for supporting the formed blade. The first profiling opening is opposite to the first profiling hole in the first direction. The positioning block is fixed on the side of the cathode assembly facing the workpiece fixture. The positioning block is provided with a positioning hole opposite to the first profiling hole. The sleeve electrochemical machining device provided by the present invention fixes the machining part of the workpiece by arranging the positioning block on the cathode assembly. The arrangement of the first profiling hole and the first profiling opening on the cathode assembly can support part of the formed blade, which helps to improve the rigidity and disturbance of the formed blade and avoid deformation of the formed blade after processing.

The application discloses a multi-tool integrated tool for blisk electrolytic machining and a blisk machining method, and relates to the technical field of electrolytic machining, and comprises a tool disc and a cathode frame. The cathode frame is fixed on the tool disc. The cathode frame comprises an insulating connecting plate, an insulating profile cathode base and an insulating rough machining cathode rod. Profile shaping machining cathodes are fixed on the two sides of the profile cathode base. Rough machining cathodes are fixed on the end of the rough machining cathode rod. The rough machining cathodes and semi-finishing cathodes are fixed together through the cathode frame. In the rough machining and semi-finishing of the whole blisk, all blade profiles on the whole blisk can be machined at the same time. The problems of high labor intensity, low machining efficiency, large cumulative error and long machining cycle in the prior art are overcome. The machining precision of each blade is consistent. The product quality after machining is stable. The difficulty of subsequent whole blisk finishing is reduced. The machining efficiency of the whole blisk is improved.

The invention relates to a gas-assisted plasma enhanced electrochemical machining tool and method, and belongs to the field of plasma enhanced electrochemical machining. The tool comprises a tool base body, a blanking cap, an air inlet connector and a sealing gasket. The blanking cap presses the sealing gasket to the upper end of the base body through threaded connection, and an air cavity surrounding the center hole is formed in the base body. In the machining process, compressed air is input into the air cavity through the air inlet connector and sprayed out through the group holes in the bottom of the base body, the electrolyte form sprayed out of the center hole of the base body is restrained, a stable air film layer between the bottom end of the tool and the boundary of the electrolyte is formed, gas plasmas are formed through excitation under a strong electric field, and plasma enhanced electrochemical machining of the large-size electrode is achieved. According to the method, a more stable and controllable gas film condition is provided for plasma enhanced electrolytic machining by utilizing an airflow constraint method, the process window and the application scene of the process are widened, and efficient and high-quality machining of difficult-to-machine materials without tool loss is facilitated.

A generator for generating processing pulses at the electrode gap (3) of a device for electrochemically machining workpieces (1), comprising a power supply device (7) and switching devices (9) for pulse-wise connection of the power supply device (7) to connecting cables (5, 6) that are led to the electrode gap (3), with a circuit (8, 9, 13, 15) for increasing the steepness of the edges (25, 27) of current pulses flowing through the electrode gap (3) by recuperating field energy stored in the connecting cables (5, 6) during the pulses, wherein the circuit (8, 9, 13, 15) is provided for recuperating field energy stored as a result of the inductance (10) of the connecting cables (5, 6) and for recuperating the field energy by charging a capacitor (13) by a current that the inductance (10) generates after the connecting cables (5, 6) have been separated from the power supply device (7) by the switching device (9). and the circuit (8,9,13,15) comprises a diode (8) preventing the discharge of the capacitor (13) via the power supply device (7), characterized in that the connecting cables (5, 6), the power supply device (7), the capacitor (13) and the diode (8) are connected in series in such a way that they are arranged on a common current path at least for the current flowing during the recuperation of the field energy stored in the connecting cables (5, 6).

The present invention provides a modular fixture and a machining method for blisk electrochemical machining, belonging to the technical field of electrochemical machining. It adopts a modular structure design that can be quickly disassembled and assembled, different from the integral structure design of traditional fixtures. It mainly includes a cathode fixing module, a bearing module, and a clamping module. For different machining angles, the relative position of the bearing module and the cathode fixing module is adjusted to drive the workpiece to rotate around the Y-axis to different angles to seek a smaller blade shielding angle; by designing and adjusting the sub-module features of the clamping module, the clamping and fixing of blisks with different size specifications can be realized on the premise of ensuring the repeat positioning accuracy of the workpiece. The characteristic of the modular structure is that only the corresponding module needs to be changed to change a certain sub-function. This design reduces the program complexity, shortens the product R & D and manufacturing cycle, changes the limitation of the traditional fixture of "one-to-one", and greatly enhances the versatility of the fixture.