RU2590743C1 - Method of multiple-point pulsed electrochemical treatment of blades in robotic system and device therefor - Google Patents

Abstract

FIELD: chemistry.

SUBSTANCE: invention relates to high-precision electrochemical treatment. Method includes treatment of an anode workpiece with two cathode tools at low working interelectrode gaps with supply of packets of process voltage pulses, wherein method includes first treating with one cathode tool, and then, after turning anode workpiece by 180°, with second cathode tool. Preliminary anode workpiece is based on ground treated lock part of appliance with elements for its location, elements for fixation of anode workpiece and supply to it and elements, ensuring its gripping and turn through 180°, and cathode tools are installed on two electrochemical profiling machines. Further treatment of surfaces of blade is carried out in said appliance, device satellite is combined with each cathode tool to allow laminar flow of electrolyte without cavitation at inlet and outlet of interelectrode gap.

EFFECT: invention provides accurate and stable forming of all surfaces of aircraft gas turbine engine vane flow section.

3 cl, 5 dwg

Description

The invention relates to the field of high-precision electrochemical processing (ECM) at small interelectrode gaps, mainly to the processing of blades of aircraft gas-turbine engines from titanium and heat-resistant intermetallic alloys as part of a robotic complex.

A known method for the electrochemical treatment of titanium and titanium alloys in electrolytes based on one-component aqueous solutions of neutral salts using anodic activating regulated high-frequency rectangular current pulses supplied by packets that synchronize with the moment of maximum approximation of the oscillating electrode-tool with the workpiece electrode and process on small working interelectrode gaps, in which the electrode potentials are measured at the end of each pulse during processing present i-th packet after breaking current, fixed steady-state value of the electrode potential in each next packet alter pulse parameter, such as the period T _i pulse by an amount ΔT _i until a steady electrode potential its minimum value, and further conduct the electrochemical machining process, adjusting the pulse repetition period, so as to keep the value of the steady-state electrode potential in the region of the minimum value. As the electrode potential, it is possible to measure the anode potential or the total value of the anode and cathode potentials. As the steady-state value of the electrode potential, the electrode potential measured at the end of the last pulse in the packet can be taken. The sign of the magnitude of the period change ΔT _i following the pulses in each subsequent packet can be determined by the sign of the ratio

- период следования импульсов и установившееся значение потенциала в текущем i-м пакете. Величину электродного потенциала в области минимальных значений можно поддерживать за счет изменения длительности импульсов в пакете. С целью повышения достоверности измерений электродных потенциалов отключение тока осуществляют за время не более 10^-8 с и для исключения искажений, вызванных переходным процессом, возникающим в измерительном контуре после выключения тока, кривую спада потенциала обрабатывают цифровым фильтром и определяют электродный потенциал путем экстраполяции экспоненциальной кривой, характеризующей изменение потенциала после выключения тока, до пересечения с прямой, проходящей через точки начала и конца отключения тока. Ведение процесса при поддержании минимального значения установившегося электродного потенциала, измеренного после выключения тока, с осуществлением регулирования параметров импульсов, например периода их следования в пакете, позволяет обеспечивать высокое качество поверхности при электрохимической обработке титана и его сплавов при изготовлении сложнофасонных полостей (патент РФ №2271905, МПК В23Н 3/00, 3/02, опубл. 20.03.2006).where T _i $${\varphi }_i^{*}$$

- the pulse repetition period and the steady-state value of the potential in the current i-th packet. The value of the electrode potential in the region of minimum values can be maintained by changing the pulse duration in the packet. In order to increase the reliability of measurements of electrode potentials, the current is switched off in a period of not more than 10 ^-8 s and to eliminate distortions caused by the transient process that occurs in the measuring circuit after turning off the current, the potential decay curve is processed with a digital filter and the electrode potential is determined by extrapolating the exponential curve, characterizing the change in potential after turning off the current, before crossing with a straight line passing through the points of the beginning and end of the current disconnecting. Maintaining the process while maintaining the minimum value of the steady-state electrode potential, measured after turning off the current, by adjusting the parameters of the pulses, for example, the period of their repetition in the packet, allows for high surface quality during the electrochemical treatment of titanium and its alloys in the manufacture of composite cavities (RF patent No. 2271905, IPC V23N 3/00, 3/02, publ. March 20, 2006).

The disadvantage of this method is the low information content and, accordingly, the accuracy of control, because the change in the electrode potential when used for processing electrolytes based on one-component aqueous solutions of neutral salts becomes a less informative parameter for controlling the process, which does not allow it to be automated.

A known method of electrochemical dimensional processing of turbine blades, including sequentially processing two vibrating cathodes-tools with synchronized with the oscillations of the cathodes-tools supplying pulses of technological voltage and with the translational movement of the cathodes-tools relative to the anode-workpiece, on which the profile of the blade is carried out first with one removable cathode tool, and then, after turning the anode-workpiece in the mounting fixture along the axis 180 ° and setting it to removable dielectric tool tray, the profile of which repeats the geometry of the working surface of the first cathode-tool, the second removable cathode-tool with an amplitude value of the process voltage of 6-8 Volts, a linear feed rate of each of the cathodes of 0.23-0.28 mm / min and the pulse duration of the technological voltage 3000-3400 μs (RF patent No. 2305614, B23H 3/00, 9/10, publ. 09/10/2007).

The disadvantage of this method is the lack of accuracy and low surface quality, which does not allow to obtain the edges of the blades.

A known method of integrating technological operations in the processing of parts of complex shape, according to which the part is placed in a satellite device, the outer edges of which are alternately used as reference, installation or alignment to orient the axes, surfaces or points of the part designated as basic, and from which during processing carry out a direct readout of the executive dimensions, and in order to perform the next technological transition, the part is turned together with the satellite device to its corresponding Ranh (RF patent №2145918, V23N 3/00, 7/00, 9/00, publ. 02.27.2000).

This method allows you to integrate a number of technological operations into one, replacing the operations with transitions with a corresponding reduction in the necessary equipment, to reduce the complexity of manufacturing due to the refusal to reattach the blades to the operations.

The disadvantage of this method is the need for initial use of the finished blade for reference, the use of templates when basing and, consequently, an increase in the total error due to an error in the manufacture of templates and an error in setting the position of the blade for them, which as a result negatively affects the accuracy of the manufacture of the blade.

Closest to the proposed method is the electrochemical shaping of turbine blades, comprising processing two vibrating cathodes-tools with synchronized oscillations of the cathodes-tools supplying pulses of technological voltage and with the translational movement of the cathodes-tools relative to the anode-blank, in which the profile of the blade is carried out sequentially first one removable cathode-tool, and then after turning the anode-workpiece in the mounting fixture 18 0 ° - the second removable cathode-tool with an amplitude value of the technological voltage of 6-10 V, a linear feed rate of each of the cathode-tools 0.2-0.25 mm / min and a pulse duration of the technological voltage of 2700-3300 μs, while the magnitude of the amplitude the process voltage and the linear feed rate of the cathode-tool smoothly change from maximum to minimum values in inverse proportion to the area of the forming profile of the blade, and the magnitude of the pulse duration of the process voltage smoothly change t of minimum to maximum values is directly proportional to the area of the forming profile of the blade, and for the design of the convex and concave sides of the feather of the blade with the adjacent profiles of the lock using cathodes tools made on a milling machine with numerical control by mathematical model, calculated in accordance with the dimensions manufactured blades (RF patent No. 2283735, B23H 3/00, 9/10, B23P 15/02, publ. 09/20/2006).

The disadvantage of this method is the need for manual rearrangement of the cathode-tools and the flipping of the anode-blank, which does not allow its use in automated areas during mass production. In addition, the accuracy of manufacturing the blade is reduced as a result of its multiple manual basing during processing, and also due to the fact that when turning the workpiece at the second transition, when the workpiece becomes very thin, it is difficult to provide reliable current supply and heat supply to the processed blade.

A device for implementing a method of integrating technological operations in the processing of parts of complex shape, which is made with the required number of external reference, installation or alignment faces and contains a mechanism for securing the part, a base stop installed in the axial direction, and two basic template-lodgements mounted from the condition the location of the theoretical longitudinal axis of the part installed on them parallel to the device faces located in the axial direction and perpendicular to the other faces, this distance from the axes, surfaces or points of the part designated as the base, to the faces of the device are set, and the surfaces of the part to be processed are located outside the device (RF patent No. 2145918, B23H 7/00, 9/00, 3/00, publ. 27.02 .2000).

Despite the fact that the known device allows you to reduce additional equipment for re-fastening the blades and to ensure the fixation of the blades when processing both the "back" and the "trough", thereby eliminating its multiple basing on intermediate technological bases, its disadvantage is that the device does not contain elements for creating, at each revolution, the shape of closed hydrodynamic paths of pumping the electrolyte that are optimal in shape, which impairs the quality of the blade processing and does not allow producing edges with a small radius nd, not contain components for automatic mounting and dismounting it from the machine, which does not allow to automate the process.

A device for electrochemical dimensional processing of turbine blades is known, which contains two tool cathodes, a workpiece anode with an interelectrode gap between the tool cathode and the workpiece anode, into which the electrolyte enters, a device for attaching two tool cathodes, a device for attaching a workpiece, a base the plate, and also further comprises a removable tool tray made of a dielectric material having a profile repeating the geometry of the working surface of the first cathode-tool and installed embedded between the billet anode and the base plate (RF patent No. 2305614, B23H 3/00, 9/10, publ. 09/10/2007).

The disadvantage of this device is that it does not allow the processing of thin compressor blades made of titanium and heat-resistant intermetallic alloys, since it does not provide reliable current supply and heat dissipation at the second transition, when turning the workpiece when the workpiece becomes very thin. Also, the possibility of its use in the conditions of automated sections during mass production, excluding the manual cathode rearrangement and billet revolution, is not provided.

The closest to the proposed device is a device for electrochemical dimensional processing of turbine blades, which contains two removable cathode-tool and the anode-workpiece installed with an interelectrode gap for the electrolyte, a device for attaching two cathode-tools and a device for attaching the anode-workpiece containing a sub-electrode plate for alternately fixing removable cathodes-tools, forming the convex and concave sides of the blade, and the anode-workpiece with technological allowance at the end on the sides in the cross section has the shape of a parallelogram with an acute angle equal to the acute angle of the cross section of the paddle lock, and is located on a base plate having the same angle between the sides of the working surface, and the base plate, technological allowances for the anode blanks, sub-electrode plate have cool holes through which pins made of dielectric material are installed along a sliding fit with H8 / h7 qualification to ensure that each of the two tool cathodes is located relative to the anode - blanks (RF patent No. 2283735, B23H 3/00, 9/10, B23P 15/02, publ. 09/20/2006).

The disadvantage of this device is that it does not allow for the accuracy of manufacturing thin blades, since at the second transition, when turning the workpiece, when the workpiece becomes very thin, reliable current supply and heat removal, as well as the optimal angle of inclination of the tool to the work surface, are not provided and , accordingly, the optimal hydraulic flow pattern of the electrolyte separately for the back and trough of the blade, which does not allow to process the edges of the blade and shelf of the blade with high accuracy tew. Also, the possibility of its use in the conditions of robotic complexes in the mass production of blades is not provided, since a long and complex reconfiguration of the cathode-instruments is required.

The task to which the invention is directed is to increase the level of process automation in an automated section of electrochemical machines as part of a robotic complex.

The technical result is the provision of accurate and stable in a large batch of parts of the formation of all surfaces of the flowing part of the blades in an automated area of at least two electrochemical machines as part of a robotic complex.

The problem is solved, and the technical result is achieved by the proposed method of pulsed electrochemical processing of the blades of aircraft gas turbine engines, including processing with two cathodes-tools on small working interelectrode gaps with the supply of pulses of technological voltage pulses, in which the processing of the profile of the blades is carried out sequentially: first with one cathode-tool, and then, after turning the billet anode 180 °, the second cathode-tool, in which, according to the invention, Before processing, the anode-workpiece is based and fixed in the satellite tool along the finished machined lock part, and the tool cathodes are installed on two electrochemical copying machines of the robotic complex and then the surfaces of the blades are machined in the satellite tool to obtain the aerodynamic surface of the “back”, the nodule zone and shelves on the first machine, and with obtaining the surface of the “trough”, the near-edge zone and the shelf, the inlet and outlet edges of the blade — on the second machine, and when combined with posobleniya satellite every cathode-tool provide laminar without the occurrence of cavitation within the electrolyte inlet and outlet of the interelectrode gap.

In addition, according to the invention, it is possible to install several workpiece anodes in a satellite device.

The problem is solved, and the technical result is also achieved by the fact that in the device for pulsed electrochemical processing of the blades of an aircraft gas turbine engine containing two tool cathodes, a workpiece anode with an interelectrode gap between the tool cathode and the workpiece anode, into which the electrolyte enters, the device for attaching tool cathodes, a device for attaching a workpiece anode mounted on a base device, according to the invention, a device for attaching a workpiece anode nano in the form of a removable satellite device with structural elements for its basing, fixing the workpiece anode and supplying current to it, and structural elements providing the possibility of its capture and rotation through 180 ° by the robot manipulator of the robotic complex, the device for attaching the cathode-instruments is made in in the form of two devices, and the basic device is made in the form of two wedge-shaped mounting plates installed in pairs on two electrochemical copy machines, respectively, for feeding the “back” of the blade on the first machine and the “trough” on the second machine, with each mounting plate equipped with elements for automatically fixing the satellite device, fixing the pen profile of the anode blank, input and output channels for pumping the electrolyte, while the inner surface of the device -satellite from the “back” side and the inner surface of the satellite device from the “trough” side of the blade and the corresponding outer surfaces of the cathode-tools and the anode-blank are made with the possibility of both sintering of the laminar flow without occurrence of cavitation of the electrolyte flow at the input and output of the interelectrode gap when combining the satellite tool and the cathode tool.

The basing and fixing of the anode billet on the finished machined locking part in the satellite device having elements for its basing, fixing the billet anode and supplying current to it allows to ensure the accuracy of the manufacture of the blade by eliminating intermediate operations for its basing and fixing and creating optimal in the form of closed hydrodynamic paths for pumping the electrolyte at each revolution, as well as automate the process of electrochemical processing of GTE blades due to the possibility of its capture, rotation 180 ° and installation on the mounting plate of each machine by gripping the robot manipulator of the robotic complex.

The implementation of the device for mounting the cathode-tools in the form of two devices, and the basic device in the form of two wedge-shaped mounting plates installed in pairs on two electrochemical copying machines, respectively, to design the "back" of the blade on the first machine and the "trough" on the second machine, allows to separate the operations for processing the "back" and "trough" of the blade, thereby excluding the readjustment operation of the cathode-tools and the anode-workpiece, to provide the possibility of installing the satellite grip device Ohm robot manipulator for each machine, which allows you to automate the process and provide multi-place processing of the blades. In addition, due to the lack of readjustment of the cathode-tools and the anode-billet, a stable current supply and heat supply to the mounting plate with input and output channels for pumping the electrolyte are ensured on each machine, which allows creating conditions for ensuring the accuracy of the formation of the blades.

The presence on the mounting plate of elements for fixing the satellite tool, fixing the pen profile of the anode-workpiece allows you to exclude vibration of the anode-workpiece and thereby ensure the accuracy of shaping of all surfaces of the flowing part of the blade in terms of processing their large batch on an automated section of electrochemical machines as part of a robotic complex.

The wedge-shaped shape of the mounting plates provides the optimal angle of the cathode-tool feed vector to the surface of the blade, which allows you to maintain high quality surfaces of a large batch of processed blades, reducing their processing time.

Providing a laminar flow of electrolyte at the inlet and outlet of the interelectrode gap without cavitation when combining the satellite tool with the cathode tool makes it possible to exclude uncontrolled removal of metal from the surface of the billet anode forming the edges of the blade and to ensure high quality of forming.

A device for implementing the proposed method is illustrated by drawings.

In FIG. 1 shows a wedge-shaped mounting plate with a satellite device mounted thereon; in FIG. 2 shows a satellite tool for attaching a workpiece anode with a workpiece anode installed; in FIG. 3 - satellite device for mounting the anode-workpiece (assembled); in FIG. 4 - mounting plate for mounting a removable satellite device; in FIG. 5 shows a flow diagram of an electrolyte when combining a satellite tool and a cathode tool.

The device for electrochemical processing contains two identical wedge-shaped mounting plates 1 (one plate is shown in the drawings), each of which has a base 2, mounted on the desktop, respectively, of the first and second electrochemical copying machines of the robotic complex. On the same machines, with the help of shanks 3, cathodes-tools 4 are fixed (one cathode-tool is shown), respectively, on the first machine - a cathode-tool for forming the "back" of the blade, and on the second machine - "trough" (machines are not shown) . The device also contains a removable satellite device 5 for attaching the anode-blank 6. On the housing 7 of the satellite-5 device, a system of bases and clamps 8 is installed, with which the processed anode-blank 6 is fixed (Fig. 2). On the housing 7 of the satellite device 5, a base system 9 is also installed for installing the satellite device 5 on the mounting plates 1 and pins 10 for its capture by the gripper of the robot manipulator of the robotic complex. The base system and clamps 8 corresponds to the specific type of blade being machined, and the base system 9 and pins 10 are unified for all blades of the same size. If it is necessary to process a large number of blades, the satellite device may contain several sets of base systems and clamps 8 for fixing several anode blanks. Thus, the satellite tool 5 not only gives the blade a reliable technological base, but also is an adapter that allows you to process different blades on the same mounting plates.

The processed anode blank 6 is electrically connected to the housing 7 of the satellite device 5 using the current lead terminal 11.

To ensure the electrical isolation of the cathode-tool 4 from the satellite device 5, as well as to organize the flow of electrolyte on the housing 7, a set of parts 12 made of dielectric materials is installed. When assembled, the set of parts 12 forms a window 13 in the satellite tool 5, into which the cathode tool 4 fits tightly when combined with the satellite tool 5.

Each wedge-shaped mounting plate 1 has a tilt angle A, which defines the feed direction of the cathode-tool 4 to the surface of the blade and is defined as the angle between the longitudinal axis of the blade and the direction of movement of the cathode-tool 4.

Each mounting plate 1 has a base plane 14, on which are located the base elements 15 and automatic clamps 16 for fixing the satellite device. On the base plane 14 there is a contact pad 17, which serves to transfer electric current from the mounting plate 1 to the satellite device 5, as well as the input and output channels 18 for pumping the electrolyte and plug 19, which, when the satellite device 5 is installed, are inside the window 13 satellite tool 5 formed by a set of parts 12. The plug 19 is designed to fix the pen profile of the anode blank 6 and is located below the pen profile of the anode blank (Fig. 5). The window formed by the set of parts 12, the plug 19, the input and output channels 18, the anode-blank 6 and the cathode-tool 4 (Fig. 5), when combining the cathode-tool 4 and the satellite tool 5 form an interelectrode gap 20, which organizes the electrolyte flow in the gap between the cathode-tool 4 and the anode-blank 6. To ensure laminar flow without occurrence of cavitation of the electrolyte at the inlet and outlet of the interelectrode gap, the inner surface of the satellite device 5 from the “back” side and its inner surface from the “ oryta "blade and the corresponding external surface of the cathode tools 4 and anode-formed preform with low roughness and in the formation of the blade edges have maximum rounding.

A device for electrochemical processing of blades of aircraft gas turbine engines works as follows.

The robotic complex consists of 2 electrochemical copying machines, on which cathodes-tools 4 are installed respectively with shanks, on the first machine-cathode-tool for the design of the "back" of the blade, and on the second machine-"trough" (machines not shown) . Using the base 2, the same wedge-shaped mounting plates 1 are installed on the working tables of the same machines, the angle of inclination A of which corresponds to the type of blade being processed. The anode blank 6 is installed in the housing 7 of the satellite tool 5 and fixed by a system of bases and clamps 8, clamp the current lead terminal 11 and mount a set of parts 12. Assembly / disassembly of the satellite tool 5 can be performed in parallel with the operation of electrochemical machines. To do this, at least three such satellite devices should be included in the snap-in kit: two are in processing, and on the third the blade is removed / installed.

After assembly, the satellite tool 5 using the pins 10 is captured by the gripper of the robotic arm and mounted on a wedge-shaped mounting plate 1, mounted on the first machine. In this case, the satellite device 5 is based on the cathode-tool 4 by means of base systems 9, base elements 15 and automatic clamps 16 and is electrically connected to the mounting plate 1 through the contact pad 17 and thus connected to the positive pole of the technological current generator (not shown in the drawing ) The plug 19 in this case fixes the profile of the pen of the anode-workpiece to prevent vibration of the anode-workpiece during processing.

After fixing the satellite tool 5 on the mounting plate 1, the cathode-tool 4 according to the program of work of the robotic complex starts moving towards the workpiece anode 6 and enters the window 13 of the satellite tool 5 from above (Fig. 5). The base plane 14 together with a set of parts 12 and the cathode-tool 4 form a sealed chamber into which an electrolyte is pumped through the input and output channels 18 through the interelectrode gap 20. The increased pressure of the electrolyte in this chamber allows you to process the blade with high productivity and reduces the likelihood of breakdown of the interelectrode gap. The plug 19 blocks the flow of electrolyte below the anode-blank 6, causing it to flow between the cathode-tool 4 and the anode-blank 6 along the interelectrode gap 20.

After the process of processing the “back” of the blade, the robotic arm, according to the specified program, removes the satellite tool 5 from the first machine, turns it 180 ° and installs it on the second machine for processing the “trough” of the blade. The interaction of the cathode-tool 4 and the satellite tool 5, fixed on the mounting plate 1, on the second machine occurs similarly to their interaction on the first machine. After processing on the second machine, the robot manipulator transfers the satellite device 5 to the transport system, from where the satellite device is delivered to the finished product area, where it is disassembled with the processed blade removed.

The proposed method is illustrated by the following example. The electrochemical processing method is implemented on 2 electrochemical copying machines of a robotic complex having working chambers, an electrolyte supply and regeneration system, switching power supplies and a control system (not shown in the drawings). Shanks 3 are mounted on each machine for fastening the cathode-tools 4 and wedge-shaped mounting plates 1. The feed drive of the machines allows both the working feed and the oscillation of the cathode-tool 4 with the required frequency and amplitude ..

The cathodes-tools 4 are made of chromium-nickel stainless steel. An aqueous solution of the following composition was used as an electrolyte: 8% NaNO ₃ + 3% NaCl + 1% KBr at a temperature at the entrance to the interelectrode gap of T = 35 ° C and an electrolyte pressure of 6 bar. The inclination angle of both mounting plates 1 is 30 °, which corresponds to the feed direction of the cathode-tool for processing.

Before processing, the anode-blank 6 of VT6 titanium alloy is based and fixed in the satellite tool 5 along the finished machined lock part. Then the robot manipulator installs the satellite tool 5 on the mounting plate 1 of the first machine, where it is automatically fixed by the automatic clamps 16, after which, according to the specified program, the cathode-tool 4 is fed to the billet anode 6. Electrochemical processing of the “back” of the blade is carried out on small working interelectrode gaps (15 ... 50 microns) with the supply of packets of pulses of technological voltage:

- the frequency of the packet of current pulses and vibration of the electrode-tool, (Hz) - 50 (period T of oscillations of 20 ms);

- the duration of the packet t _p (ms) - 2.4;

- the duration of the current pulses in the packet, t _i (μs) - 100;

- the duration of the pauses between the current pulses in a packet, t _p (ms) - 200;

- the minimum voltage of the pulses in the packet, U, (B) - 14;

- the amplitude of the oscillations of the electrode tool, And _in (mm) - 0.15;

- electrolyte pressure at the entrance of the interelectrode gap, (kPa) - 400;

- electrolyte temperature, (° C) - 25.

After closing the working chamber and starting the technological program, the processes of pulsed electrochemical processing occur automatically. The processing process is divided in depth into several stages, each of which has its own processing mode: processing the scapula shelf, switching to processing the pen, removing the main allowance from the pen, and creating a “back” profile.

After the formation of the “back” of the blade is completed, the robotic arm removes the satellite tool 5 from the mounting plate 1 of the first machine, turns it 180 ° and installs it on the mounting plate of the second machine to form the “trough” of the blade. The processing process is carried out under the same conditions as the processing of the "back" of the scapula.

After processing on the second machine, the gripper of the robotic arm removes the satellite tool 5 from the mounting plate of the second machine and transfers it to the transport system, from where the satellite tool 4 is delivered to the finished product area, where the finished blade is removed from the satellite tool. When using several satellite devices, parallel operation of 2 machines and removal / installation of a blade are possible.

Thus, the proposed method and device for its implementation provide surface treatment of the blades in the satellite device 5 to obtain the aerodynamic surface of the “back”, the adjacent zone and the shelf on the first machine, and to obtain the surface of the “trough”, the adjacent zone, the input and output edges shoulder blades.

The proposed method of electrochemical processing and the device allow for accurate and stable in a large batch of parts the shaping of all surfaces of the flowing part of the blade, including the edges, in an automated area of electrochemical machines, to increase the level of automation of the process.

Claims (3)

1. The method of pulsed electrochemical processing of the blades of an aircraft gas turbine engine, comprising processing the billet anode with two tool cathodes at small working interelectrode gaps with supplying pulses of process voltage pulses, at which the blade profile is processed first with one tool cathode, and after turning the billet anode 180 ° - the second cathode-tool, characterized in that before processing the anode-workpiece is based on its finish machined castle part in adapted a satellite with elements for its basing, elements for fixing the billet anode and supplying current to it, and elements providing the possibility of its capture and rotation through 180 °, and the cathodes-tools are installed on two electrochemical copying machines, and then the processing of the surfaces of the blades lead in the aforementioned satellite device with obtaining the aerodynamic surface of the “back”, the nodule zone and the shelf on the first machine, and with the receipt of the surface of the “trough”, the nodule zone, the input and output edges of the blade — on the second the machine, while the satellite device is combined with each cathode-tool, providing a laminar flow of electrolyte without cavitation at the input and output of the interelectrode gap. 2. The method according to p. 1, characterized in that several anode blanks are installed in the satellite device. 3. A device for pulsed electrochemical processing of the blades of an aircraft gas turbine engine, comprising an anode-workpiece attachment device mounted on a base device, two tool cathodes mounted with an interelectrode gap relative to the workpiece anode, into which an electrolyte enters, characterized in that it contains two electrochemical copying machines, on which cathodes-tools are fixed using shanks, and a robot manipulator for installing a device for attaching the anode-z preparations on each of the machines, while the anode-billet attachment device is made in the form of a removable satellite device having elements for its base, elements for fixing the billet anode and supplying current to it, and elements providing the possibility of capturing the anode-billet and turning on 180 ° with a robotic arm, and the basic fixture is made in the form of two wedge-shaped mounting plates installed in pairs on two electrochemical copy machines, respectively, to design the “back” of the blade on the first m machine and "trough" - on the second machine, and on the surface of each mounting plate there are elements for automatically fixing the satellite tool, fixing the pen profile of the anode workpiece, input and output channels for pumping the electrolyte, while the inner surface of the satellite tool from the side The “backs” and the inner surface of the satellite device from the side of the “trough” of the blade and the corresponding outer surfaces of the cathode-tools and the anode-blank are made with the possibility of providing laminar of cavitation electrolyte flow inlet and outlet of the interelectrode gap when combining devices satellite and cathode-tool.

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