Apparatus and method for polishing and deburring air film pores

Abstract

This invention discloses a device for deburring and polishing film holes. The device features a novel and rational structure. By incorporating an auxiliary heating system to heat the workpiece before or during polishing, it promotes the rapid formation of the film on the surface of the film holes to be polished, thereby effectively improving polishing efficiency. This solves the problems of low polishing efficiency and high processing cost in existing film hole polishing technologies and can be widely applied to parts polishing in various situations. This invention also proposes a method for deburring and polishing film holes. Based on electrolyte plasma polishing technology, by heating the workpiece before or during polishing, it promotes the rapid formation of the film on the surface of the film holes to be polished, thereby effectively improving polishing efficiency. This solves the problems of low polishing efficiency and high processing cost in existing film hole polishing technologies and can be widely applied to parts polishing in various situations.

Description

Technical Field

[0001] This invention relates to the field of metal material surface treatment technology, and in particular to an apparatus and method for polishing and deburring air film pores. Background Technology

[0002] In aero-engines, cooling gases in the internal flow channels of high-temperature components, such as turbine blades, are cooled by covering the component surface through film cooling holes ("film cooling holes"). These components typically have a wall thickness of 1.0-5.0 mm, and the diameter of the film cooling holes is usually 0.3-1.0 mm. Currently, the commonly used method for machining film cooling holes is high-speed electrical discharge machining (EDM). This machining method easily forms many fine burrs at the intersection of the hole outlet and the inner wall. These burrs will seriously affect the precision, performance, and lifespan of the parts, therefore, polishing is necessary to remove them.

[0003] Many researchers and manufacturers both domestically and internationally have conducted extensive research and exploration into deburring technology. Currently, common deburring methods include machining, abrasive flow machining, and electropolishing. Traditional machining methods struggle to process the inner surfaces of numerous, small-diameter film holes with varying orientations, and their processing efficiency is low, with the machining tool finding it difficult to reach the working position. Abrasive flow machining presents challenges in fixture design for different blade models, with long development cycles and high costs. Electropolishing is relatively more feasible and effective, but its material removal efficiency is low, and commonly used electrolytes contain toxic heavy metals or strong acids and alkalis, making them unclean, environmentally unfriendly, and prone to corroding non-machined surfaces.

[0004] In summary, it is necessary to propose a novel polishing technology for film pores in high-temperature components of aero-engines, such as turbine blades, to solve the problems of low polishing efficiency and high processing cost of existing film pore polishing technologies. Summary of the Invention

[0005] The purpose of this invention is to provide an apparatus and method for polishing and deburring film holes, which can polish and deburr film holes of high-temperature components in aero-engines such as turbine blades, thereby solving the problems of low polishing efficiency and high processing cost of existing film hole polishing technologies.

[0006] To achieve the above objectives, the present invention provides the following solution:

[0007] This invention provides an apparatus for polishing and deburring air film pores, comprising:

[0008] A processing system includes an electrode and an electrode driving mechanism, wherein the electrode driving mechanism is capable of driving the electrode to rotate;

[0009] A positioning system is used for clamping and positioning the workpiece to be processed, and adjusting the relative position between the workpiece to be processed and the electrode so that the electrode can be inserted into or removed from the polishing air film hole on the workpiece to be processed.

[0010] An auxiliary heating system is used to heat the workpiece to be processed;

[0011] An electrolyte supply system is used to provide electrolyte to the air film pores to be polished, so as to ionize the electrolyte and generate plasma by using the electric field generated when the electrode rotates in the air film pores to be polished, thereby achieving the polishing treatment of the air film pores to be polished.

[0012] Optionally, the electrolyte supply system includes a storage tank for holding the electrolyte; the electrode is a hollow electrode with a liquid flow channel inside, and the polishing section of the hollow electrode has a plurality of electrode outlet holes communicating with the liquid flow channel on its side wall; the outlet of the storage tank is connected to a delivery pipeline, and the delivery pipeline is connected to the liquid flow channel through a rotary joint to deliver the electrolyte through the electrode outlet holes to the gas film hole to be polished.

[0013] Optionally, the electrolyte supply system includes a storage tank for holding the electrolyte; the electrode includes an electrode body and an auxiliary filling nozzle sleeved outside the electrode body, the electrode body is connected to the electrode driving mechanism, an annular liquid flow channel is formed between the inner wall of the auxiliary filling nozzle and the outer wall of the electrode body, and the polishing section of the electrode body extends to the outside of the outlet of the auxiliary filling nozzle; the outlet of the storage tank is connected to the auxiliary filling nozzle through a liquid delivery pipeline to transport the electrolyte through the annular liquid flow channel into the gas film hole to be polished.

[0014] Optionally, it also includes a processing table with an electrolyte collection tank, the positioning system is set on the processing table, and the positioning system is provided with an electrolyte flow channel communicating with the air film hole to be polished and an electrolyte collection box sleeved on the outer periphery of the workpiece to be processed, the electrolyte flow channel communicating with the electrolyte collection tank, and the electrolyte collection box communicating with the electrolyte collection tank through a collection box drain pipe.

[0015] Optionally, the electrolyte collection tank is also connected to the storage tank via a return liquid pipeline, and an electrolyte filter is provided on the return liquid pipeline; the return liquid pipeline and the infusion pipeline are also connected via an overflow pipeline, and a flow regulating device is provided at the connection between the overflow pipeline and the infusion pipeline.

[0016] Optionally, the electrode is an irregularly shaped electrode, which includes a vertical rod section and a corner section disposed at one end of the vertical rod section. The corner section is used to extend into the lower part of the air film hole to be polished, so as to polish the burr position at the intersection of the outlet of the air film hole to be polished and the inner cavity of the workpiece.

[0017] Optionally, the auxiliary heating system is an electromagnetic heater, which is used to be directly connected to the workpiece to be processed.

[0018] Optionally, the positioning system includes:

[0019] A cradle-type rotary table is used to adjust the orientation of the air film hole to be polished on the workpiece relative to the electrode axis;

[0020] The lower clamp is mounted on the worktable of the cradle-type rotary table via a connecting plate;

[0021] An upper clamp is located above and connected to the lower clamp. The upper clamp is provided with an installation space for mounting the workpiece to be processed and a locking nut for fixing the workpiece to be processed.

[0022] A three-axis linear positioning mechanism is located on one side outside the machining table. The electrode driving mechanism is connected to the three-axis linear positioning mechanism. The three-axis linear positioning mechanism is used to drive the electrode driving mechanism to move relative to the workpiece in space to achieve positioning. The three-axis linear positioning mechanism is mounted on the bed of the machine.

[0023] Optionally, the electrode driving mechanism is an electrode rotary motor, which is connected to the electrode via a processing head.

[0024] Optionally, the system also includes a control system and a temperature measuring component, the temperature measuring component being used to monitor the temperature of the workpiece to be processed; both the auxiliary heating system and the temperature measuring component are communicatively connected to the control system.

[0025] This invention also proposes a method for polishing and deburring air film pores, comprising:

[0026] Adjust the spatial orientation of at least one of the workpiece to be processed and the electrode so that the electrode is inserted into the polishing air film hole on the workpiece to be processed;

[0027] After heating the workpiece to a preset temperature, electrolyte is supplied to the air film pores to be polished;

[0028] The electrode is driven to rotate, so as to use the electric field generated when the electrode rotates to ionize the electrolyte and generate plasma, thereby achieving the polishing treatment of the air film pores to be polished.

[0029] The present invention achieves the following technical effects compared to the prior art:

[0030] The device for polishing and deburring air film holes proposed in this invention has a novel and reasonable structure. By setting an auxiliary heating system to heat the workpiece before or during polishing, it can promote the rapid formation of air film on the surface of the air film holes to be polished, thereby effectively improving the polishing efficiency. It solves the problems of low polishing efficiency and high processing cost of existing air film hole polishing technology, and can be widely used for polishing parts in various occasions.

[0031] In some technical solutions of this invention, the electrodes are arranged in an "L"-shaped irregular structure. During high-speed electrical discharge machining, fine burrs easily form around the intersection line formed by the outlet of the film gas hole and the inner cavity. Because the film gas hole is small and the inner cavity is closed, it is difficult to polish directly on the inner wall. This invention uses an L-shaped electrode as the cathode, which can realize electrolyte plasma polishing of small holes with a large depth-to-diameter ratio, and is especially suitable for burr removal at the intersection line of the outlet of the film gas hole in worm gear blades.

[0032] In some technical solutions of the present invention, a temperature measuring component is also provided. The temperature measuring component and the auxiliary heating system form a temperature control system. By generating eddy currents inside the metal through a magnetic field, the blade can be heated to boiling of the polishing liquid. This avoids the situation where the auxiliary electrode and the workpiece boil the polishing liquid first due to heating the parts by Joule heating alone. This ensures that the breakdown discharge occurs on the inner wall of the gas film hole to be polished on the anode.

[0033] Compared with the prior art, the performance improvement of the present invention is as follows:

[0034] (1) The processing characteristics of the heat-assisted electrolyte plasma polishing deburring method are utilized. Specific salt solutions are used for specific materials, which improves the environmental friendliness of turbine blade air film hole polishing deburring. At the same time, the working fluid can be circulated, filtered and replenished, thereby reducing costs.

[0035] (2) By using irregularly shaped electrodes and special electrolyte solutions, local deburring is achieved, which can prevent the electrolyte from damaging other non-processed parts. At the same time, due to the good processing effect of the heat-assisted electrolyte plasma polishing deburring method, the processing accuracy and surface quality are improved, thus enhancing the deburring effect.

[0036] (3) By using a temperature control system and electromagnetic heat assistance, the turbine blades are quickly heated to the boiling point of the polishing fluid. The metal workpiece is heated directly without heat transfer through the solution, which reduces the evaporation loss of the processing fluid, lowers energy consumption, avoids long-term high-temperature operation of the system, improves processing stability, and can improve processing efficiency while ensuring processing accuracy.

[0037] The method for deburring air film holes proposed in this invention, based on electrolyte plasma polishing technology, promotes the rapid formation of air film on the surface of the air film holes to be polished by heating the workpiece before or during polishing, thereby effectively improving polishing efficiency. It solves the problems of low polishing efficiency and high processing cost of existing air film hole polishing technology, and can be widely used for polishing parts in various occasions. Attached Figure Description

[0038] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0039] Figure 1 This is a schematic diagram of the overall structure of the air film hole polishing and deburring device disclosed in the embodiment of the present invention.

[0040] Figure 2 This is a schematic diagram of the fixture structure in the air film hole polishing and deburring device disclosed in the embodiment of the present invention;

[0041] Figure 3 This is a schematic diagram of the electrolyte replenishment structure and principle in the air film pore polishing and deburring device disclosed in Embodiment 1 of the present invention;

[0042] Figure 4 The diagram below shows the electrode inlet schematic of the electrolyte replenishment structure and schematic diagram disclosed in Embodiment 1 of the present invention.

[0043] Figure 5 This is a schematic diagram of the electrolyte replenishment structure and principle in the air film pore polishing and deburring device disclosed in Embodiment 2 of the present invention.

[0044] Figure 6 This is a schematic diagram of the electrode inlet hole, which is the electrolyte replenishment structure and schematic diagram disclosed in Embodiment 2 of the present invention.

[0045] Figure 7 This is a flowchart illustrating the process of using an apparatus for deburring air film holes according to an embodiment of the present invention.

[0046] The attached figures are labeled as follows:

[0047] 100-A device for polishing and deburring air film pores;

[0048] 1-Cradle-type rotary table; 2-Connecting plate; 201-First through hole; 3-Lower clamp; 301-Second through hole; 4-Upper clamp; 5-Electromagnetic heater; 6-Workpiece to be processed; 7-Outer machining groove; 8-Inner machining groove; 9-Electrode; 901-Electrode outlet; 902-Vertical rod section; 903-Corner section; 10-Machine tool processing power head; 11-Electrode rotary motor; 12-Servo module; 13-Servo motor; 14-Electrolyte replenishment tube; 15-Electrolyte replenishment solenoid valve; 16-Control box; 7-Liquid inlet pipe; 18-Flow regulating device; 19-Liquid pump; 20-Liquid outlet pipe of storage tank; 21-Liquid storage tank; 22-Liquid return pipe of storage tank; 23-Overflow pipe; 24-Electrolyte filter; 25-Drain pipe of processing tank; 26-Drain solenoid valve of processing tank; 27-Drain pipe of collection box; 28-Electrolyte collection box; 29-Sealing ring; 30-Locking nut; 31-Temperature measuring component; 32-Electrolyte; 33-Bubble; 34-Air film layer; 35-Air film hole to be polished; 36-Auxiliary filling nozzle. Detailed Implementation

[0049] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0050] One of the objectives of this invention is to provide an apparatus for polishing and deburring film holes, which can polish and deburr film holes in high-temperature components of aero-engines such as turbine blades, thereby solving the problems of low polishing efficiency and high processing cost of existing film hole polishing technologies.

[0051] Another objective of this invention is to provide a method for polishing and deburring film holes, which can polish and deburr film holes in high-temperature components such as turbine blades in aero engines, thereby solving the problems of low polishing efficiency and high processing cost of existing film hole polishing technologies.

[0052] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0053] Example 1

[0054] like Figure 1As shown, this embodiment provides a device 100 for polishing and deburring air film holes, which mainly includes a processing system, a positioning system, an auxiliary heating system and an electrolyte supply system. The processing system includes an electrode 9 and an electrode driving mechanism, which drives the electrode 9 to rotate. A positioning system is used for clamping and positioning the workpiece 6 and adjusting the relative position between the workpiece 6 and the electrode 9 so that the electrode 9 can be inserted into or removed from the polishing air film hole 35. Preferably, the positioning system can adjust the axis of the electrode 9 to coincide with the axis of the polishing air film hole 35 on the workpiece 6. An auxiliary heating system is used to heat the workpiece 6. It can preheat the workpiece 6 before polishing, provide auxiliary heating during polishing, or heat the workpiece 6 from before polishing until the end of polishing, depending on the actual processing requirements. An electrolyte supply system provides electrolyte 32 to the polishing air film hole 35. Electrolyte 32 is an electrolyte working fluid, which is generally liquid. It is generally required that electrolyte 32 flow uniformly and stably. Electrolytes with different compositions can be configured according to different polishing requirements; salt solutions, such as ammonium sulfate solutions with a mass fraction of 3%-7%, are commonly used. Under the drive of the electrode driving mechanism, the electrode 9 can rotate inside the air film hole 35 to be polished and generate an electric field, thereby ionizing the electrolyte 32 and generating plasma, thus achieving the polishing treatment of the air film hole 35 to be polished.

[0055] As described above, the core of the air film hole polishing and deburring device 100 proposed in this embodiment is the heat-assisted electrolyte plasma polishing technology. It uses a salt solution (an aqueous solution of salt) as the processing medium, which is not only low-cost but also pollution-free, thus contributing to energy conservation and environmental protection. The aforementioned electrolyte plasma polishing technology is a composite processing technology that couples gas discharge with chemical reaction. It is a novel polishing method where, under high voltage, a gas layer is generated on the surface of the metal workpiece immersed in the polishing liquid, and plasma discharge is generated through breakdown between the gas layers. Simultaneously, by setting an auxiliary heating system to heat the workpiece 6 before or during polishing, it can promote the rapid formation of the gas film on the surface of the air film hole 35 to be polished, thereby effectively improving polishing efficiency. This solves the problems of low polishing efficiency and high processing cost of existing air film hole polishing technologies and can be widely applied to parts polishing in various situations.

[0056] Further, in this embodiment, the electrolyte supply system includes a storage tank 21 for holding the electrolyte 32. Correspondingly, the electrode 9 is a hollow electrode with a liquid flow channel inside. The polishing section of the hollow electrode, i.e., the part used to insert into the gas film hole 35 to be polished, has several electrode outlet holes 901 on its side wall that communicate with the liquid flow channel. The outlet of the storage tank 21 is connected to a delivery pipeline, which is connected to the liquid flow channel through a rotary joint to deliver the electrolyte 32 to the gas film hole 35 to be polished via the electrode outlet holes 901. The electrode 9 is generally located above the workpiece 6 to be processed, so the bottom of the electrode 9 is generally the aforementioned "polishing section". To ensure that the electrolyte 32 flows fully into the gas film hole 35 to be polished, it is preferable that each electrode outlet hole 901 is an oblique hole, i.e., the axis of the hole is arranged at an angle to the axis of rotation of the electrode 9, and each electrode outlet hole 901 is inclined. It is preferable that each electrode outlet hole 901 is evenly distributed in the polishing section of the hollow electrode. The infusion tubing is connected to electrode 9 via a rotary joint. Its "joint characteristics" ensure continuous, leak-free delivery of electrolyte 32 into the liquid flow channel, while its "rotation characteristics" ensure the infusion tubing is unaffected by the rotation of electrode 9, preventing it from tangling and affecting performance. The rotary joint is an existing gas-liquid phase delivery joint, and its details will not be elaborated further. In addition to the aforementioned rotary joint connection, a corresponding machine tool power head can be connected to the end of electrode 9. Electrode 9 is connected to an electrode drive mechanism via the machine tool power head. The electrode drive mechanism can drive electrode 9 to rotate through internal components of the machine tool power head. The aforementioned infusion tubing is connected to the machine tool power head, and electrolyte 32 can be discharged into the liquid flow channel within electrode 9 through the internal channel of the machine tool power head. The machine tool power head is existing technology, and its details will not be elaborated further here.

[0057] In this embodiment, a processing table with an electrolyte collection tank is also included. This processing table can be an independent workbench structure or a traditional machine tool workbench. Some components of the aforementioned positioning system are mounted on the processing table. The positioning system is equipped with an electrolyte flow channel communicating with the air film hole 35 to be polished and an electrolyte collection box 28 fitted around the outer periphery of the workpiece 6. The electrolyte flow channel communicates with the electrolyte collection tank, and the electrolyte collection box 28 is connected to the electrolyte collection tank via a collection box drain pipe 27. During the polishing process, the generated electrolyte waste liquid generally flows into the electrolyte collection tank through the electrolyte flow channel or the collection box drain pipe 27 for storage. After the electrolyte in the collection tank reaches a certain capacity, it can be centrally processed. The electrolyte collection tank consists of an inner processing groove 8 located at the edge of the processing table and an outer processing groove 7 located around the outer ring of the inner processing groove 8. The inner processing tank 8 and the outer processing tank 7 are different parts of the overall electrolyte collection tank. The inner processing tank 8 is generally a processing tank with three sides and a bottom. A T-shaped platform is installed on the bottom, which can accommodate a cradle-type rotary table 1. The inner processing tank 8 has a grid drain outlet on its side. The outer processing tank 7 has a valve to control the drain outlet and a lever to control the liquid level. This function is needed when immersion processing is performed. The working fluid in the inner processing tank 8 can flow into the outer processing tank 7 through the grid drain outlet. The outer processing tank 7 is equipped with a sliding door that can be lowered for personnel operation. The processing tank structure formed by the combination of the inner processing tank 8 and the outer processing tank 7 is widely used in wire cutting machines, forming machines, and other machine tools. In addition to this type, there are also automatic lifting tanks, which will not be described in detail here.

[0058] In this embodiment, to improve the utilization rate of the electrolyte, a return pipeline is preferably connected between the electrolyte collection tank and the storage tank 21, and an electrolyte filter 24 is installed on the return pipeline. The electrolyte waste liquid collected in the electrolyte collection tank can be filtered by the electrolyte filter 24 and returned to the storage tank 21 for repeated recycling, which can reduce the cost of electrolyte and thus reduce the polishing cost. The infusion pipeline, the storage tank 21, the electrode 9, the electrolyte flow channel of the positioning system (or the collection box drain pipe 27), and the return pipeline form the electrolyte 32 circulation path. The return pipeline and the infusion pipeline are also connected by an overflow pipeline 23, and a flow regulating device 18 is installed at the connection between the overflow pipeline 23 and the infusion pipeline. The flow regulating device 18 can be an existing flow regulating valve.

[0059] Further, in this embodiment, the aforementioned infusion pipeline specifically includes, in sequence along the electrolyte flow direction, a storage tank outlet pipe 20, a pump 19, a flow regulating device 18, an inlet pipe 17, an electrolyte replenishment solenoid valve 15, and an electrolyte replenishment pipe 14, wherein the electrolyte replenishment pipe 14 is connected to the internal liquid flow channel of the electrode 19 and is connected to the outlet of the storage tank 21. The return pipeline specifically includes, in sequence along the electrolyte flow direction, a processing tank drain solenoid valve 26, a processing tank drain pipe 25, an electrolyte filter 24, and a storage tank return pipe 22, wherein the processing tank drain solenoid valve 26 is connected to the external processing tank 7, and the storage tank return pipe 22 is connected to the return port of the storage tank 21. Simultaneously, the electrolyte collection box 28 is connected to the external processing tank 7 via the collection box drain pipe 27, and further connected to the aforementioned processing tank drain solenoid valve 26. Electrolyte 23 passes through the processing tank drain pipe 25 and the electrolyte filter 24 in sequence and enters the storage tank return pipe 22, and then flows back to the storage tank 21. At the same time, the electrolyte flowing out from the workpiece 6 during processing is collected by the electrolyte collection box 28 and flows out from the collection box drain pipe 27 connected to the electrolyte collection box 28, so as to avoid damage to the fixture or the rotary table.

[0060] In this embodiment, the electrolyte supply system's storage tank 21 is equipped with both the aforementioned inlet and outlet pipelines, thus forming an electrolyte filtration and circulation system. During the polishing process of the air film holes 35 to be polished, the pump 19, the processing tank drain solenoid valve 26, and the electrolyte replenishment solenoid valve 15 are opened to partially fill the processing area with working fluid. The flow rate of the electrolyte reaching the electrolyte replenishment pipe 14 is controlled by the flow regulating device 18. The electrolyte flows into the electrolyte replenishment pipe 14 under the action of the pump 19, and then flows into the air film holes 3 to be polished through the pipeline of the machine tool processing power head 10. The used electrolyte, i.e., the electrolyte waste liquid, flows through the electrolyte collection box 28 and the collection box drain pipe 27 to the processing tank drain pipe 25, and is filtered into clean electrolyte by the electrolyte filter 24 before flowing back to the storage tank 21.

[0061] In this embodiment, as Figure 3 and Figure 4As shown, electrode 9 is preferably an irregularly shaped electrode, generally in the shape of an "L". It mainly includes a vertical rod section 902 and a corner section 903 located at one end of the vertical rod section 902. The corner section 903 extends below the air film hole 35 to be polished, polishing the burr area at the intersection of the outlet of the air film hole 35 and the inner cavity of the workpiece. The cross-sectional profiles of the vertical rod section 902 and the corner section 903 can be rectangular, circular, etc. To improve polishing quality, it is preferable that the cross-sectional profiles of both the vertical rod section 902 and the corner section 903 are circular, i.e., the overall profile of the vertical rod section 902 is cylindrical. The angle between the corner section 903 and the vertical rod section 902 can be 75–170°, preferably 90–120°, and further preferably 90°, i.e., the electrode 9 is generally in the shape of a right-angled "L". In actual operation, such as... Figure 4 As shown, firstly, the corner segment 903 of electrode 9 is inserted through the gas film hole 35 to be polished. Then, electrode 9 is moved so that its vertical rod segment 902 is coaxial with the gas film hole 35 to be polished, and then electrode 9 can be driven to rotate. This solution, through the above-mentioned arrangement of irregularly shaped electrodes, can solve the problem of deburring and polishing at the intersection of a small-diameter gas film hole and the complex curved surface of the inner cavity of the workpiece 6. Combined with the auxiliary heating system and the electrode arrangement, it can solve problems that cannot be handled by conventional methods or even traditional electrolyte plasma.

[0062] Furthermore, since a liquid flow channel is provided inside the electrode 9, the use of this hollow electrode for electrolyte replenishment is an internal electrolyte replenishment method. The electrolyte 32 flows through the liquid flow channel inside the electrode 9 and is discharged from the electrode outlet hole 901 of the electrode 9 into the gas film hole 35 to be polished, thereby filling the gas film hole 35 to be polished with electrolyte liquid.

[0063] In this embodiment, the aforementioned auxiliary heating system can be a non-contact heating structure such as an electromagnetic heater 5. Preferably, the auxiliary heating system is an electromagnetic heater 5, which is directly connected to the workpiece 6. In practical applications, the electromagnetic heater 5 is fixed around the workpiece 6. The electromagnetic heater 5 generates an alternating magnetic field that induces eddy currents in the workpiece 6, causing the atoms within the material to move at high speed and randomly. The atoms collide and rub against each other, generating heat energy, thus preheating the workpiece 6. By directly heating the workpiece 6 with the electromagnetic heater 5, the workpiece 6 can be quickly heated to the point where the polishing fluid boils, avoiding the boiling of the polishing fluid around the electrode and the workpiece before the workpiece is heated by Joule heating alone. This ensures that the breakdown discharge occurs on the inner wall of the polishing film hole 35 of the anode.

[0064] In this embodiment, the aforementioned positioning system is mainly used for clamping and positioning the workpiece 6 and adjusting the relative positional relationship between the workpiece 6 and the electrode 9. The positioning system specifically includes a cradle-type rotary table 1, a lower clamp 3, an upper clamp 4, and a three-axis linear positioning mechanism. The cradle-type rotary table 1 is mainly used for rotating and adjusting the orientation of the workpiece 6 relative to the electrode 9. The cradle-type rotary table 1 is fixedly installed on the aforementioned processing table with an electrolyte collection tank. The lower clamp 3 is installed on the worktable surface of the cradle-type rotary table 1 via a connecting plate 2. Figure 2 As shown, a second through hole 301 and a first through hole 201 are respectively opened at the center of the lower clamp 3 and the center of the connecting plate 2, and the second through hole 301 and the first through hole 201 are connected to each other. A channel clearance hole is opened at the corresponding position of the cradle-type rotary table 1, and a corresponding connecting channel is opened in the processing table. The second through hole 301, the first through hole 201, the channel clearance hole, the connecting channel and the aforementioned electrolyte collection tank are connected. The upper clamp 4 is located above the lower clamp 3 and is connected to the lower clamp 3 via screws, nuts, or other connecting parts. A sealing ring 29 is provided at the connection point between the upper clamp 4 and the lower clamp 3 for sealing. The upper clamp 4 has an installation space for mounting the workpiece 6 and a locking nut 30 for securing the workpiece 6. The installation space within the upper clamp 4 is connected to the second through hole 301. In actual operation, the electrolyte waste liquid discharged from the polishing air film hole 35 of the workpiece 6 within the installation space of the upper clamp 4 flows sequentially through the aforementioned second through hole 301, first through hole 201, channel clearance hole, and connecting channel into the electrolyte collection tank, achieving the purpose of collecting the electrolyte waste liquid. The electrolyte waste liquid flowing out from other polishing air film holes 35 of the workpiece 6 flows into the electrolyte collection box 28, and then through the collection box drain pipe 27 into the processing tank drain pipe 25.

[0065] In this embodiment, the aforementioned three-axis linear positioning mechanism is mainly used to adjust the spatial relative position between the electrode 9 and a certain air film hole 35 to be polished on the workpiece 6. The three-axis linear positioning mechanism and the cradle-type rotary table 1 can make the axis of the electrode 9 and the air film hole 35 to be polished aligned and smoothly enter the air film hole 35 to be polished, so as to achieve precise positioning.

[0066] In this embodiment, both the lower clamp 3 and the upper clamp 4 are preferably made of high-temperature resistant non-conductive insulating material, specifically polytetrafluoroethylene.

[0067] In this embodiment, the three-axis linear positioning mechanism is mounted on the machine bed, located on one side of the machining table, and the cradle-type rotary table 1 is mounted on the machining table. The three-axis linear positioning mechanism includes the components shown on... Figure 1The figure includes a servo module 12 and servo motor 13 in the Z direction, as well as servo modules and servo motors in the X and Y directions (not shown in the figure). The aforementioned cradle-type rotary table 1 and three-axis linear positioning mechanism are communicatively connected to the control system to achieve multi-axis linkage movement control of the cradle-type rotary table 1 and the three-axis linear positioning mechanism. Since this is existing technology, details are not elaborated here. In this embodiment, the position of each moving axis corresponding to each polishing air film hole 35 on the workpiece 6 can be calculated using a tool tip following algorithm or CAM software, thereby achieving precise positioning.

[0068] In this embodiment, a control system and a temperature measuring component 31 are also configured. The temperature measuring component 31 is used to monitor the temperature of the workpiece 6 to be processed. Both the auxiliary heating system and the temperature measuring component 31 are communicatively connected to the control system. The control system is preferably a control box 16. The temperature measuring component 31 can be a thermocouple, an infrared thermometer, etc., and is mainly aimed at the part of the workpiece 6 to be processed. As a preferred option, an infrared thermometer is selected as the temperature measuring component 31 in this embodiment.

[0069] The following uses a turbine blade as an example to illustrate the application process and operating principle of the air film hole polishing and deburring device 100 in this embodiment. The specific operation of the air film hole polishing and deburring device 100 includes the following steps:

[0070] S1 Preparation Stage: Clamp the turbine blades onto the upper fixture 4, install the fixture onto the cradle rotary table 1, prepare the electrolyte 32, place the electrolyte 32 in the storage tank 21, and prepare the machining program at the same time.

[0071] S2 Single-hole machining positioning stage: Driven by the positioning system, the turbine blade is adjusted and positioned at a fixed distance above the position of the air film hole 35 to be polished, and the axis of the air film hole 35 to be polished and the rotation axis of the electrode 9 are aligned.

[0072] S3 Pre-processing stage: Driven by the three-axis linear positioning mechanism, the electrode 9 (the aforementioned L-shaped hollow electrode) first enters the air film hole 35 to be polished eccentrically along the axis of the air film hole 35 to be polished. After the corner section 903 of the electrode 9 is fully entered into the air film hole 35 to be polished, it moves radially along the air film hole 35 to make the vertical rod section 902 in the electrode 9 coaxial with the air film hole 35 to be polished. Then, the electromagnetic heater 5 is started to preheat the turbine blade. After the set temperature is reached, the electrolyte supply system is turned on, and the liquid pump 19, electrolyte replenishment solenoid valve 15, processing tank drain solenoid valve 26 and flow rate adjustment device 18 are turned on. At the same time, the electrode 9 is connected to the negative terminal of the power supply by default, and the turbine blade to be polished and deburred is connected to the positive terminal of the power supply.

[0073] S4 Processing Stage: After the turbine blade inner cavity and the polishing film hole 35 are filled with a stable flow of electrolyte 32, the processing power supply is turned on for processing. During the processing, the electrode 9 rotates slowly, forming a strong electric field at the intersection of the polishing film hole 35 and the inner cavity of the turbine blade. This promotes the generation of plasma at the outlet intersection of the polishing film hole 35. At the same time, the infrared thermometer (i.e., the temperature measuring component 31) is turned on to monitor the temperature of the electrolyte 32 near the processing area. After the temperature reaches a stable range, the temperature is regulated by the temperature control module in the control box 16. During high-speed electrical discharge machining (EDM), fine burrs easily form around the intersection line between the gas film hole outlet and the inner cavity. Due to the small size of the gas film hole and the closed inner cavity, it is difficult to polish directly on the inner wall. This solution uses an L-shaped electrode 9 as the cathode, which can achieve electrolyte plasma polishing of small holes with a large depth-to-diameter ratio, especially suitable for burr removal at the intersection line of the outlet of the gas film hole in the blade. The burr removal principle is as follows: the electrolyte 32 first enters the electrolytic state, generating a small amount of gas or bubbles 33. At the same time, the electrolyte 32 and the gas film hole 35 to be polished on the turbine blade come into direct contact, instantly forming a short circuit and generating Joule heat. Under the combined action of high-temperature heating by the electromagnetic heater 5, the burr near the blade is removed. Thermal boiling occurs on the inner wall of the air film hole 35 to be polished. Then, the electromagnetic heater 5 is turned off, forming an extremely thin air film layer 34 around the workpiece, completely isolating the area to be processed in the air film hole 35 to be polished from the electrolyte 32. Since the conductivity of the air film layer 34 is much lower than that of the turbine blade and the electrolyte 32, a local high voltage is formed at the air film layer 34, causing the air film layer 34 to be ionized and discharged. The burr position at the intersection of the outlet of the air film hole 35 and the inner cavity protrudes. The thickness of the air film layer 34 is relatively small. At the same time, the electric field strength is large at the corner of the L-shaped electrode 9, and the discharge occurs more frequently in these places, thereby removing the burr at the intersection of the outlet of the air film hole 35 to be polished.

[0074] S5 Exit Stage: Power supply, electrolyte supply and temperature measurement components are turned off. After electrode 9 stops rotating, it exits the polishing air film hole 35 in a certain order. It is determined whether to process the next hole. If processing continues, it moves to the next hole to be processed and repeats steps S2-S4. If processing ends, the processing positioning part moves to a safe position and the polished turbine blade is removed.

[0075] In this embodiment, the heat-assisted film-forming hole electrolyte plasma polishing deburring device described above features a turbine blade connected to the positive terminal of a power supply, an electrode 9 connected to the negative terminal, and an electromagnetic heater 5 directly heating the workpiece. After electrolyte 32 is introduced into the film-forming hole 35 of the turbine blade to be polished, the electrolyte 32 and the turbine blade come into direct contact, instantly forming a short circuit. The turbine blade generates Joule heat, and under the auxiliary high temperature of the electromagnetic heater 5, thermal boiling occurs near the inner wall of the film-forming hole 35, forming an extremely thin gas layer inside the hole. This completely isolates the turbine blade and electrolyte 32. Because the conductivity of the gas layer is much lower than that of the workpiece and the electrolyte, a local high voltage is formed at the gas layer, causing ionization and breakdown discharge. The burr position at the intersection of the outlet and inner cavity of the film-forming hole 35 is raised, and the gas layer thickness is relatively small. Simultaneously, the electrode 9 adopts an "L"-shaped irregular structure, resulting in a large electric field intensity at the bending corner, causing more discharge to occur in these areas, thus achieving the removal of the intersection burrs within the film-forming hole.

[0076] As described above, the device 100 for polishing and deburring film holes in this technical solution solves the problem that in existing technologies, when film holes are small, have a large depth-to-diameter ratio, and are enclosed, it is difficult to directly polish the burrs at the intersection of the small hole and the inner cavity on the inner wall. By using non-conductive materials to make the turbine blade fixture, conductive damage to the cradle-type rotary table 1 can be prevented, while resisting high-temperature ablation during plasma discharge. By using electrode 9 as the cathode and using an internal replenishment method to fill the film hole 35 to be polished in the processing area with electrolyte 32, a field strength is formed locally only at the film hole, thereby achieving local processing at the film hole and avoiding damage to non-processed areas. By using an aqueous salt solution as the electrolyte working fluid, it can be recycled multiple times after simple filtration, solving the problems of waste liquid treatment and serious pollution in traditional electrochemical methods. By using auxiliary electromagnetic heating, the turbine blade is quickly heated to boiling of the polishing fluid, which avoids the boiling of the polishing fluid around the electrode 9 and the workpiece first due to Joule heating of the parts alone, thus ensuring that the breakdown discharge occurs on the inner wall of the film hole 35 to be polished at the anode.

[0077] Compared with existing technologies, the unique new functions / effects of this technical solution include:

[0078] (1) The electrolyte fills the gas film holes of the turbine blade to be polished by internal replenishment and flows from the inner cavity of the turbine blade to the electrolyte collection box. After flowing out from the collection box drain pipe, it enters the electrolyte supply component, avoiding the processing of other non-processed parts of the turbine blade, and at the same time avoiding the electrolyte from flowing to the cradle-type rotary table and damaging the rotary table.

[0079] (2) Using an L-shaped electrode as the cathode and rotating the electrode during the processing can effectively increase the electric field intensity at the intersection burr position in the air film hole of the turbine blade and improve the removal efficiency.

[0080] (3) By using electromagnetic heating, eddy currents are generated inside the metal through the magnetic field, which can quickly heat the turbine blades to the boiling point of the polishing liquid. This avoids the situation where the auxiliary electrode and the workpiece are boiled first due to Joule heating of the parts, thus ensuring that the breakdown discharge occurs on the inner wall of the gas film hole to be polished at the anode.

[0081] (4) Electrolyte plasma polishing deburring device and method for heat-assisted turbine blade film pores: Electrolyte plasma polishing technology solves the problem that there are many burrs at the intersection of the small-diameter film pores and the complex curved surface of the turbine blade cavity, which cannot be polished by conventional methods.

[0082] Compared with existing technologies, the performance improvement of this technical solution lies in:

[0083] (1) The processing characteristics of the heat-assisted electrolyte plasma polishing deburring method are utilized. Specific salt solutions are used for specific materials, which improves the environmental friendliness of turbine blade air film hole polishing deburring. At the same time, the working fluid can be circulated, filtered and replenished, thereby reducing costs.

[0084] (2) By using irregularly shaped electrodes and special electrolyte solutions, local deburring is achieved, which can prevent the electrolyte from damaging other non-processed parts. At the same time, due to the good processing effect of the heat-assisted electrolyte plasma polishing deburring method, the processing accuracy and surface quality are improved, thus enhancing the deburring effect.

[0085] (3) By using a temperature control system and electromagnetic heat assistance, the turbine blades are quickly heated to the boiling point of the polishing fluid. The metal workpiece is heated directly without heat transfer through the solution, which reduces the evaporation loss of the processing fluid, lowers energy consumption, avoids long-term high-temperature operation of the system, improves processing stability, and can improve processing efficiency while ensuring processing accuracy.

[0086] (4) By combining the irregular electrode and the electromagnetic heat-assisted device, the rapid formation of the gas film on the surface to be polished can be promoted. This not only solves the problem of deburring and polishing at the intersection of the small-diameter gas film hole and the complex curved surface of the blade cavity, but also improves the polishing efficiency, reduces the processing cost, and reduces the risk of corrosion on the non-processed surface of the component.

[0087] Example 2

[0088] This embodiment proposes a device 100 for polishing and deburring film pores. The only difference between this device and Embodiment 1 is the electrode arrangement; all other aspects are the same and will not be described further. In this embodiment, the electrode 9 includes an electrode body and an auxiliary liquid-filling nozzle 36 sleeved outside the electrode body. The electrode body is connected to the electrode drive mechanism via a machine tool processing power head 10. An annular liquid flow channel is formed between the inner wall of the auxiliary liquid-filling nozzle 36 and the outer wall of the electrode body. Figure 5 and Figure 6 As shown, the polishing section of the electrode body does not have an outlet hole, but the polishing section extends a certain distance beyond the outlet of the auxiliary filling nozzle 36. This ensures that after the polishing section of the electrode body enters the gas film hole 35 to be polished, the outlet of the auxiliary filling nozzle 36 is just close to the inlet of the gas film hole 35 to be polished, ensuring that the electrolyte discharged from the annular liquid flow channel can enter the gas film hole 35 to be polished. The outlet of the liquid storage tank 21 is directly connected to the auxiliary filling nozzle 36 through a liquid delivery pipeline to transport the electrolyte 32 to the gas film hole 35 to be polished through the annular liquid flow channel. The auxiliary filling nozzle 36 can be directly and fixedly connected to the outer shell of the machine tool processing power head 10. The auxiliary filling nozzle 36 does not rotate with the electrode body, so there is no need to consider the effect of the electrode body rotation on the entanglement of the liquid delivery pipeline.

[0089] Furthermore, the electrode body described above can adopt the irregular electrode structure in Embodiment 1, the difference being that the electrolyte does not flow inside the electrode body, and the polished section of the electrode body does not need to be provided with an outlet hole. The specific configuration and usage of the irregular electrode are the same as in Embodiment 1, and will not be repeated here.

[0090] Compared to the internal electrolyte replenishment method of the hollow electrode 9 in Embodiment 1, the electrode in this embodiment uses an external electrolyte replenishment method because the electrolyte is discharged from the outside of the electrode body. The electrolyte 32 flows through the auxiliary filling nozzle 36, flows out along the gap between the outer wall of the electrode body and the inner wall of the auxiliary filling nozzle 36, and flows along the electrode body into the gas film hole 35 to be polished, thereby filling the gas film hole 35 to be polished with liquid.

[0091] Both the internal electrolyte replenishment method in Example 1 and the auxiliary external replenishment method in this example involve filling the workpiece machining area with electrolyte 32 to the polishing gas film hole 35, forming an electric field only locally at the polishing gas film hole 35, thereby achieving localized machining at the polishing gas film hole 35 and avoiding damage to non-machined parts of the workpiece. By using an aqueous salt solution as the electrolyte working fluid, and by simply filtering it for recycling, the problems of waste liquid treatment and serious pollution of traditional electrochemical methods are solved.

[0092] Example 3

[0093] This embodiment proposes a method for polishing and deburring air film pores, including:

[0094] Adjust at least one of the workpiece 6 and the electrode 9 so that the electrode 9 is inserted into the polishing air film hole 35 on the workpiece 6.

[0095] After heating the workpiece 6 to a preset temperature, electrolyte is supplied to the air film hole 35 to be polished;

[0096] The driving electrode 9 is rotated so that the electric field generated when the electrode 9 rotates can be used to ionize the electrolyte and generate plasma, thereby achieving the polishing treatment of the air film hole 35 to be polished.

[0097] The above-mentioned method for polishing and deburring film holes can be implemented using the apparatus of Embodiment 1 or Embodiment 2. The following description uses a turbine blade as the workpiece 6 and the apparatus (including electrodes) as the film hole polishing and deburring apparatus 100 from Embodiment 1 as an example to illustrate the specific implementation process and principle of the above-mentioned method for polishing and deburring film holes.

[0098] In practice, the following steps should be followed:

[0099] Step S1: Clamp the turbine blades onto the upper fixture 4 and install the fixture onto the cradle rotary table 1. Prepare the electrolyte and place it in the storage tank 21. At the same time, prepare the machining program.

[0100] Step S2: Driven by the positioning system, the turbine blade is adjusted and positioned at a fixed distance above the location of the air film hole 35 to be polished, and the axis of the air film hole 35 to be polished is aligned with the rotation axis of the electrode 9.

[0101] Step S3: Driven by the three-axis linear positioning mechanism, the electrode 9 (the aforementioned L-shaped hollow electrode) first enters the air film hole 35 to be polished eccentrically along the axis of the air film hole 35 to be polished. After the corner section 903 of the electrode 9 is fully entered into the air film hole 35 to be polished, it moves radially along the air film hole 35 to make the vertical rod section 902 in the electrode 9 coaxial with the air film hole 35 to be polished. Then, the electromagnetic heater 5 is started to preheat the turbine blade. After the set temperature is reached, the electrolyte supply system is turned on, and the liquid pump 19, electrolyte replenishment solenoid valve 15, processing tank drain solenoid valve 26 and flow rate adjustment device 18 are turned on. At the same time, the electrode 9 is connected to the negative terminal of the power supply by default, and the turbine blade to be polished and deburred is connected to the positive terminal of the power supply.

[0102] Step S4: After the inner cavity of the turbine blade and the air film hole 35 to be polished are filled with a stable flow of electrolyte 32, the processing power supply is turned on for processing. During the processing, the electrode 9 rotates slowly, forming a strong electric field at the intersection of the air film hole 35 to be polished and the inner cavity of the turbine blade. This promotes the generation of plasma at the intersection of the outlet of the air film hole 35 to be polished. At the same time, the infrared thermometer (i.e., the temperature measuring component 31) is turned on to monitor the temperature of the electrolyte 32 near the part to be processed. After the temperature reaches a stable range, the temperature is regulated by the temperature control module in the control box. During high-speed electrical discharge machining (EDM), fine burrs easily form around the intersection line between the gas film hole outlet and the inner cavity. Due to the small size of the gas film hole and the closed inner cavity, it is difficult to polish directly on the inner wall. This solution uses an L-shaped electrode 9 as the cathode, which can achieve electrolyte plasma polishing of small holes with a large depth-to-diameter ratio, especially suitable for burr removal at the intersection line of the outlet of the gas film hole in the blade. The burr removal principle is as follows: the electrolyte 32 first enters the electrolytic state, generating a small amount of gas or bubbles 33. At the same time, the electrolyte 32 and the gas film hole 35 to be polished on the turbine blade come into direct contact, instantly forming a short circuit and generating Joule heat. Under the combined action of high-temperature heating by the electromagnetic heater 5, the burr near the blade is removed. Thermal boiling occurs on the inner wall of the air film hole 35 to be polished. Then, the electromagnetic heater 5 is turned off, forming an extremely thin air film layer 34 around the workpiece, completely isolating the area to be processed in the air film hole 35 to be polished from the electrolyte 32. Since the conductivity of the air film layer 34 is much lower than that of the turbine blade and the electrolyte 32, a local high voltage is formed at the air film layer 34, causing the air film layer 34 to be ionized and discharged. The burr position at the intersection of the outlet of the air film hole 35 and the inner cavity protrudes. The thickness of the air film layer 34 is relatively small. At the same time, the electric field strength is large at the corner of the L-shaped electrode 9, and the discharge occurs more frequently in these places, thereby removing the burr at the intersection of the outlet of the air film hole 35 to be polished.

[0103] Step S5: Turn off the power, electrolyte supply and temperature measuring components. After the electrode 9 stops rotating, it exits the polishing air film hole 35 in a certain order. Determine whether to process the next hole. If processing continues, move to the next hole to be processed and repeat steps S2-S4. If processing ends, the processing positioning part moves to a safe position and the polished turbine blade is removed.

[0104] In the above scheme, an L-shaped electrode is used as the cathode. Rotating the electrode during processing can effectively increase the local electric field intensity at the intersection burr position in the air film hole of the blade, improve the burr removal efficiency, and avoid damage to other non-processed parts. The temperature control system composed of electromagnetic heater and infrared thermometer generates eddy currents in the metal through magnetic field, which quickly heats the blade to boiling point of the polishing liquid. This avoids the situation where the auxiliary electrode and the workpiece boil together first due to Joule heating of the parts alone, thus ensuring that the breakdown discharge occurs on the inner wall of the air film hole 35 to be polished at the anode.

[0105] Compared with existing technologies, the performance improvement of this technical solution lies in:

[0106] (1) The processing characteristics of the heat-assisted electrolyte plasma polishing deburring method are utilized. Specific salt solutions are used for specific materials, which improves the environmental friendliness of turbine blade air film hole polishing deburring. At the same time, the working fluid can be circulated, filtered and replenished, thereby reducing costs.

[0107] (2) By using irregularly shaped electrodes and special electrolyte solutions, local deburring is achieved, which can prevent the electrolyte from damaging other non-processed parts. At the same time, due to the good processing effect of the heat-assisted electrolyte plasma polishing deburring method, the processing accuracy and surface quality are improved, thus enhancing the deburring effect.

[0108] (3) By using a temperature control system and electromagnetic heat assistance, the turbine blades are quickly heated to the boiling point of the polishing fluid. The metal workpiece is heated directly without heat transfer through the solution, which reduces the evaporation loss of the processing fluid, lowers energy consumption, avoids long-term high-temperature operation of the system, improves processing stability, and can improve processing efficiency while ensuring processing accuracy.

[0109] It should be noted that, for those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention, and no reference numerals in the claims should be construed as limiting the scope of the claims.

[0110] Specific examples have been used to illustrate the principles and implementation methods of this invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this invention. Furthermore, those skilled in the art will recognize that, based on the ideas of this invention, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this invention.

Claims

1. An apparatus for polishing and deburring air film pores, characterized in that, include: A processing system includes an electrode and an electrode driving mechanism, wherein the electrode driving mechanism is capable of driving the electrode to rotate; A positioning system is used for clamping and positioning the workpiece to be processed and adjusting the relative position between the workpiece and the electrode so that the electrode can be inserted into or removed from the polishing air film hole on the workpiece. The positioning system includes a cradle-type rotary table, a lower clamp, an upper clamp, and a three-axis linear positioning mechanism. The cradle-type rotary table is used to adjust the orientation of the polishing air film hole on the workpiece relative to the electrode axis. The lower clamp is mounted on the worktable of the cradle-type rotary table via a connecting plate. The upper clamp is located above the lower clamp and connected to the lower clamp. The upper clamp is provided with an installation space for mounting the workpiece and a locking nut for fixing the workpiece. The electrode driving mechanism is connected to the three-axis linear positioning mechanism, which is used to drive the electrode driving mechanism to move relative to the workpiece in space to achieve positioning. A processing table with an electrolyte collection tank is provided. The three-axis linear positioning mechanism is located on one side outside the processing table. The positioning system is provided with an electrolyte flow channel communicating with the air film hole to be polished and an electrolyte collection box sleeved on the outer periphery of the workpiece to be processed. The electrolyte flow channel is connected to the electrolyte collection tank, and the electrolyte collection box is connected to the electrolyte collection tank through a collection box drain pipe. An auxiliary heating system, which is an electromagnetic heater, is directly connected to the workpiece to be processed and is used to heat the workpiece. An electrolyte supply system is used to supply electrolyte to the air film pores to be polished, so as to ionize the electrolyte and generate plasma by utilizing the electric field generated when the electrode rotates in the air film pores to achieve polishing treatment of the air film pores to be polished; the electrolyte supply system includes a storage tank for holding the electrolyte; the electrode is a hollow electrode with a liquid flow channel inside, and the polishing section of the hollow electrode has a plurality of electrode outlet holes communicating with the liquid flow channel on its side wall; the outlet of the storage tank is connected to a liquid delivery pipeline, and the liquid delivery pipeline is connected to the liquid flow channel through a rotary joint to deliver the electrolyte to the air film pores to be polished through the electrode outlet holes.

2. The apparatus for polishing and deburring air film pores according to claim 1, characterized in that, The electrode can be replaced with the following: the electrode includes an electrode body and an auxiliary filling nozzle sleeved outside the electrode body. The electrode body is connected to the electrode driving mechanism. An annular liquid flow channel is formed between the inner wall of the auxiliary filling nozzle and the outer wall of the electrode body. The polishing section of the electrode body extends to the outside of the outlet of the auxiliary filling nozzle. The outlet of the liquid storage tank is connected to the auxiliary filling nozzle through a liquid delivery pipeline to transport the electrolyte to the gas film hole to be polished through the annular liquid flow channel.

3. The apparatus for polishing and deburring air film pores according to claim 1 or 2, characterized in that, The electrolyte collection tank is also connected to the storage tank via a return pipeline, and an electrolyte filter is installed on the return pipeline; the return pipeline and the infusion pipeline are also connected via an overflow pipeline, and a flow regulating device is installed at the connection between the overflow pipeline and the infusion pipeline.

4. The apparatus for polishing and deburring air film pores according to claim 1 or 2, characterized in that, The electrode is an irregularly shaped electrode, which includes a vertical rod section and a corner section disposed at one end of the vertical rod section. The corner section is used to extend into the lower part of the air film hole to be polished, so as to polish the burr position at the intersection of the outlet of the air film hole to be polished and the inner cavity of the workpiece.

5. The apparatus for polishing and deburring air film pores according to claim 1 or 2, characterized in that, It also includes a control system and a temperature measuring component, the temperature measuring component being used to monitor the temperature of the workpiece to be processed; both the auxiliary heating system and the temperature measuring component are communicatively connected to the control system.

6. A method for polishing and deburring film pores, implemented using the apparatus for polishing and deburring film pores according to any one of claims 1 to 5, characterized in that, include: Adjust the spatial orientation of at least one of the workpiece to be processed and the electrode so that the electrode is inserted into the polishing air film hole on the workpiece to be processed; After heating the workpiece to a preset temperature, electrolyte is supplied to the air film pores to be polished; The electrode is driven to rotate, so as to use the electric field generated when the electrode rotates to ionize the electrolyte and generate plasma, thereby achieving the polishing treatment of the air film pores to be polished.

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