A wire-cut electrical discharge machining device for a turbine disk

Abstract

The application discloses a kind of walk wire wire-cutting machining devices of turbine disc, it is related to walk wire wire-cutting machining technical field.Processing device includes cutting machine body, walk wire guide assembly, electrical connection assembly, monitoring control assembly;Cutting machine body is equipped with working fluid tank and clamping mobile unit;Walk wire guide assembly is located just above working fluid tank, and walk wire guide assembly includes tension wheel, driving motor, electrode wire cylinder, press wheel, annular guide groove and internal cooling circulation passage etc., realize electrode wire closed loop walk and internal cooling;Electrical connection assembly guarantees stable conduction;Monitoring control assembly realizes power supply, flow and temperature monitoring control.The application guarantees electrode wire tension stability by tension wheel and press wheel cooperation limit, two-way cooling solves heat accumulation problem, flexible conduction structure weakens spark, real-time monitoring dynamically adjusts cooling intensity, can effectively improve turbine disc mortise processing stability, precision and pass rate, satisfy high-temperature alloy turbine disc high-precision, high consistency processing demand.

Description

Technical Field

[0001] This invention relates to the field of wire EDM (Wire Cutting and Spinning) technology, and more specifically to a wire EDM apparatus for turbine disks. Background Technology

[0002] As a key hot-end component of aero-engines, turbine disks require extremely high dimensional accuracy, surface quality, and consistency in their tenon and groove structures. Traditional milling and broaching processes suffer from problems such as severe tool wear, high cutting forces, easy generation of machining stress, and difficulty in machining complex surfaces. Electrical discharge machining (EDM) wire cutting, due to its advantages such as no cutting force, ability to machine high-hardness high-temperature alloys, and strong contour adaptability, has become the mainstream process for precision machining of turbine disk tenons and grooves.

[0003] Existing turbine disk wire EDM devices still have significant shortcomings in practical applications: the electrode wire is prone to overheating and vibration during high-speed wire feeding and high-current discharge, resulting in unstable tension and fluctuating discharge state, leading to transverse vibration marks and excessive roughness on the workpiece surface; arcing and coating peeling are prone to occur at the contact point between the electrode wire and the conductive wheel, further exacerbating the risk of wire vibration and breakage; the cooling method is mostly a single external spray, which is insufficient for cooling the contact area between the tension wheel and the electrode wire, and the heat accumulation causes thermal expansion and deformation of the electrode wire and deviation in operation; at the same time, there is a lack of dynamic temperature adjustment by monitoring the electrode wire temperature, resulting in low processing stability, accuracy and pass rate, making it difficult to meet the high-precision, high-consistency and long-life processing requirements of high-temperature alloy turbine disk tenon grooves. Summary of the Invention

[0004] To address the aforementioned technical problems, the present invention adopts the following technical solution: a wire cutting processing device for turbine disks, comprising a cutting machine body, a wire guiding assembly, an electrical connection assembly, and a monitoring and control assembly; the cutting machine body serves as the supporting carrier for the entire device, and the wire guiding assembly, electrical connection assembly, and monitoring and control assembly are all fixedly mounted on the cutting machine body. The cutting machine body includes a housing, on which a working fluid tank is provided. The working fluid tank is the processing station for turbine disk workpieces, and a clamping and moving unit is provided inside. The wire guiding assembly is located directly above the working fluid tank and includes a wire feeding component, which includes a tension wheel, a drive motor, an electrode wire spool, a pressure wheel, and an annular guide groove; the drive motor is fixedly mounted inside the housing, and the output shaft of the drive motor passes through... The rotary joint is fixedly connected to one end of the tension wheel; the other end of the tension wheel is rotatably connected to the collection hood; a pressure wheel is also rotatably installed inside the housing, and the pressure wheel and the tension wheel are arranged in parallel and cooperate with each other to elastically press and limit the electrode wire. Multiple annular guide grooves are opened on the outer wall of the tension wheel to limit and constrain the electrode wire. A steering guide wheel is also rotatably installed inside the housing to turn the electrode wire and guide it to the direction of the working fluid tank; an electrode wire spool is rotatably installed inside the housing to wind and store the electrode wire. The electrode wire is led out from the electrode wire spool, guided by the pressure wheel and limited by the annular guide groove of the tension wheel. After changing direction by the steering guide wheel, it extends towards the working fluid tank, passes through the preset position of the turbine disk workpiece in the working fluid tank, circles around the inner side of the housing, is guided by the guide wheel, and finally passes back to the electrode wire spool to form a closed loop.

[0005] Furthermore, the clamping and moving unit consists of a threaded rod, a fixed plate, a sliding rod, a moving part, and an electric push rod. The moving part is slidably disposed in the working fluid tank, the threaded rod is threadedly connected to the moving part, the fixed plate is rotatably disposed on the threaded rod, the sliding rod passes through the moving part and is slidably connected to the moving part, the sliding rod is fixedly connected to the fixed plate, the electric push rod is fixedly disposed in the working fluid tank, and the telescopic end of the electric push rod is fixedly connected to the moving part. The clamping and moving unit is used to clamp and fix the turbine disk workpiece and adjust its displacement during the processing.

[0006] Furthermore, a coolant tank is fixedly installed on the top of the housing, and a coolant fixing pipe is connected to the outer surface of the coolant tank. The coolant fixing pipe is connected to an external liquid storage tank. A cooling coil and a heat dissipation pipe are arranged inside the coolant tank. A wire feeder is provided on the housing directly above the working fluid tank, and a nozzle is installed on the wire feeder. A connecting pipe is provided on the side of the coolant tank, and the end of the connecting pipe is connected to the nozzle. The nozzle spray outlet is directly facing the electrode wire, which can accurately spray low-temperature coolant to directly cool down and remove chips from the machining station of the electrode wire and the turbine disk workpiece.

[0007] Furthermore, the wire guiding assembly also includes an internal cooling circulation channel, an intermediate rotating shaft, a steering guide wheel, a discharge pipe, a water-throwing hole, a collection cover, a water collection tank, a liquid guiding channel, a rotary joint, and a delivery pipe. The tension wheel has a hollow structure, with the intermediate rotating shaft fixed at its center, forming a hollow annular space between them. This hollow annular space constitutes the internal cooling circulation channel. The intermediate rotating shaft contains a liquid guiding channel. The rotary joint consists of an outer stationary ring with a liquid inlet and an inner moving ring with a liquid outlet. The output shaft of the drive motor is fixed to the tension wheel via the inner moving ring. The coolant tank is connected to the liquid inlet of the rotary joint via the delivery pipe, and the liquid outlet of the rotary joint is connected to the liquid guiding channel, thus connecting to the internal cooling circulation channel. Multiple water-throwing holes are evenly distributed at one end of the tension wheel located in the collection cover, and these holes are connected to the internal cooling circulation channel.

[0008] Furthermore, the collection hood has a sealed shell structure to receive the coolant thrown out from the water-throwing hole. The bottom of the collection hood is provided with a water collection tank, which is connected to a discharge pipe to collect and direct the scattered dripping coolant into the discharge pipe, and finally discharge it to an external liquid treatment container.

[0009] Furthermore, the electrical connection assembly includes a fixed plate, a support plate, a conductive brush ball, a conductive rubber rod, a spring, and a wear-resistant sleeve. The specific structure of the electrical connection assembly is as follows: a support plate is vertically fixed inside the housing, a fixed plate is installed on the top of the support plate, a conductive rubber rod is installed inside the fixed plate, and sliding holes equal in number to the conductive rubber rods are provided on the inner wall of the fixed plate. The conductive rubber rods slide within the sliding holes. The conductive rubber rods are made of conductive silicone rubber. A conductive brush ball is connected to the top of the conductive rubber rod, and a spring is sleeved on the conductive rubber rod. One end of the spring abuts against the conductive brush ball, and the other end abuts against the fixed plate. The conductive brush ball is in contact with the surface of the electrode wire.

[0010] Furthermore, a wear-resistant sleeve is fitted on the outside of the conductive brush ball, and the wear-resistant sleeve is made of conductive polytetrafluoroethylene.

[0011] Furthermore, the monitoring and control component includes an insulating base, a copper ring, and a copper braided strip; the insulating base is installed inside the housing, the copper ring is installed on the insulating base, and the copper ring serves as the main power supply circuit and is electrically connected to an external high-frequency pulse power supply; the copper ring is flexibly electrically connected to the fixed disk through a copper braided strip woven from multiple strands of copper wire.

[0012] Furthermore, the monitoring and control assembly also includes control valves and flow meters. Control valves and flow meters are installed on both the connecting pipe and the delivery pipe. A temperature sensor is also installed on the fixed plate to monitor the temperature of the electrode wire.

[0013] The beneficial effects of this invention compared with the prior art are: (1) This invention uses tension wheel and pressure wheel in conjunction with an annular guide groove to elastically press and multi-directionally limit the electrode wire, effectively suppressing the swaying, jumping, shaking and loosening of the electrode wire during high-speed operation, ensuring stable tension and smooth wire feeding, significantly solving the problems of vibration marks, wire breakage and excessive surface roughness, and improving the consistency of workpiece processing. (2) On the one hand, this invention uses nozzles to accurately spray the electrode wire and workpiece processing area externally to achieve direct cooling and timely chip removal; on the other hand, it sets an internal cooling circulation channel inside the tension wheel to internally force-cool the contact area of ​​the tension wheel and electrode wire, effectively solving the problems of insufficient cooling in traditional single-path cooling, heat accumulation leading to thermal expansion deformation of the electrode wire and running deviation, further improving processing stability and accuracy. (3) This invention adopts a flexible conductive structure of conductive brush ball, conductive rubber rod and spring pre-tensioning. The conductive brush ball can adaptively fit the surface of the electrode wire, increase the contact area, reduce the contact resistance, and weaken the phenomenon of arcing and plating peeling at the contact point; in conjunction with wear-resistant sleeve to reduce friction and wear, ensure long-term stable conductivity, and reduce the risk of wire vibration and wire breakage. (4) The present invention monitors the temperature of the electrode wire in real time by using a temperature sensor and collects the flow rate of the coolant by a flow meter. The flow rate of the coolant can be dynamically adjusted according to the temperature of the electrode wire to achieve matching of cooling intensity, ensure that the electrode wire works in a reasonable temperature range, and improve the stability and safety of the operation. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0015] Figure 2 for Figure 1 Another viewpoint.

[0016] Figure 3 This is a diagram of the internal structure of the housing of the present invention.

[0017] Figure 4 This is a schematic diagram of the structure of the clamping and moving unit of the present invention.

[0018] Figure 5 This is a schematic diagram of the position and structure of the nozzle of the present invention.

[0019] Figure 6 This is a schematic diagram showing the positions of the tension wheel and pressure wheel of the present invention.

[0020] Figure 7 This is a schematic diagram of the internal structure of the tension wheel of the present invention.

[0021] Figure 8 This is a schematic diagram of the wire guide assembly of the present invention.

[0022] Figure 9 This is a schematic diagram of the electrical connection assembly of the present invention.

[0023] Figure 10 This is a schematic diagram showing the connection of the fixed disk, conductive rubber rod, conductive brush ball, and spring of the present invention.

[0024] Reference numerals: 1. Cutting machine body; 101. Threaded rod; 102. Working fluid tank; 103. Thread feeder; 104. Fixing plate; 105. Slide rod; 106. Moving part; 107. Coolant tank; 108. Connecting pipe; 109. Electrode wire; 110. Nozzle; 111. Electric push rod;

[0025] 2. Wire feeding guide assembly; 201. Wire feeding component; 2011. Tension wheel; 2012. Drive motor; 2013. Electrode wire spool; 2014. Pressure roller; 2015. Annular guide groove; 202. Internal cooling circulation channel; 203. Intermediate rotating shaft; 204. Steering guide wheel; 205. Discharge pipe; 206. Water ejection hole; 207. Collection cover; 208. Water collection tank; 209. Liquid guiding channel; 210. Rotary joint; 211. Delivery pipe;

[0026] 3. Electrical connection assembly; 301. Fixing plate; 302. Support plate; 303. Conductive brush ball; 304. Conductive rubber rod; 305. Spring; 306. Wear-resistant sleeve;

[0027] 4. Monitoring and control components; 401. Insulating base; 402. Copper ring; 403. Copper braided strap; 404. Control valve; 405. Flow meter. Detailed Implementation

[0028] The technical solution of the present invention will be further described below with reference to the accompanying drawings and specific embodiments. The accompanying drawings are for illustrative purposes only, representing schematic diagrams rather than actual physical objects, and should not be construed as limiting the scope of this patent. To better illustrate the embodiments of the present invention, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

[0029] like Figures 1-3 As shown, a wire EDM machining device for turbine disks is used for high-precision wire EDM machining of tenon grooves in high-temperature alloy turbine disks. It includes a cutting machine body 1, a wire guide assembly 2, an electrical connection assembly 3, and a monitoring and control assembly 4. The cutting machine body 1 serves as the support carrier for the entire device. The wire guide assembly 2, the electrical connection assembly 3, and the monitoring and control assembly 4 are all fixedly installed on the cutting machine body 1, working together to achieve stable clamping of the turbine disk workpiece, stable wire feeding, and dual-path cooling heat exchange.

[0030] like Figure 3 , Figure 4As shown, the cutting machine body 1 includes a housing, on which a working fluid tank 102 is provided. The working fluid tank 102 is the processing station for the turbine disk workpiece, and a clamping and moving unit is provided inside. The clamping and moving unit consists of a threaded rod 101, a fixed plate 104, a slide rod 105, a moving part 106, and an electric push rod 111. The moving part 106 is slidably disposed in the working fluid tank 102. The threaded rod 101 is threadedly connected to the moving part 106. The fixed plate 104 is rotatably disposed on the threaded rod 101, and the slide rod 105 passes through... The sliding member 106 is slidably connected to the moving member 106. The slide rod 105 is fixedly connected to the fixed plate 104. The electric push rod 111 is fixedly installed in the working fluid tank 102. The telescopic end of the electric push rod 111 is fixedly connected to the moving member 106. The clamping and moving unit is used to accurately clamp and fix the turbine disk workpiece between the fixed plate 104 and the moving member 106, and cooperates with the electric push rod 111 to realize displacement adjustment during the processing, eliminating workpiece offset, shaking and micro-displacement, and providing a reliable clamping reference for high-precision EDM cutting.

[0031] like Figure 3 As shown, a coolant tank 107 is fixedly installed on the top of the housing. The outer surface of the coolant tank 107 is connected to a coolant fixing pipe, which is connected to an external liquid storage tank, so that working fluid can be continuously replenished into the tank to ensure sufficient coolant supply.

[0032] like Figure 1 , Figures 5-8 As shown, a wire feeder 103 is provided on the housing directly above the working fluid tank 102, and a nozzle 110 is installed on the wire feeder 103; a connecting pipe 108 is provided on the side of the coolant tank 107, and the end of the connecting pipe 108 is connected to the nozzle 110. The nozzle 110 sprays directly at the electrode wire 109, which can accurately spray low-temperature coolant to directly cool the machining station of the electrode wire 109 and the turbine disk workpiece and remove the chips during cutting.

[0033] The wire feeding guide assembly 2 is located directly above the working liquid tank 102 and includes a wire feeding component 201, an internal cooling circulation channel 202, an intermediate rotating shaft 203, a steering guide wheel 204, a discharge pipe 205, a water ejection hole 206, a collection cover 207, a water collection tank 208, a liquid guiding channel 209, a rotary joint 210, and a delivery pipe 211.

[0034] The wire feeding assembly 201 includes a tension wheel 2011, a drive motor 2012, an electrode wire spool 2013, a pressure wheel 2014, and an annular guide groove 2015. The drive motor 2012 is fixedly installed inside the housing, and the output shaft of the drive motor 2012 is fixedly connected to one end of the tension wheel 2011 through a rotary joint 210. The other end of the tension wheel 2011 is rotatably connected to the collection cover 207. The pressure wheel 2014 is also rotatably arranged inside the housing. The pressure wheel 2014 and the tension wheel 2011 are arranged in parallel and cooperate with each other to press and limit the electrode wire 109.

[0035] The tension wheel 2011 has multiple annular guide grooves 2015 on its outer wall, which can radially limit and axially constrain the electrode wire 109, preventing the electrode wire 109 from shifting or jumping out of the groove. Together with the pressure wheel 2014, it maintains a constant working tension of the electrode wire 109, counteracts slack and wobbling during operation, and ensures smooth operation of the electrode wire 109. A steering guide wheel 204 is also rotatably installed inside the housing to turn the electrode wire 109 and guide it toward the working fluid tank 102.

[0036] An electrode wire spool 2013 is rotatably installed inside the housing for winding and storing the electrode wire 109, ensuring an orderly and sufficient quantity of electrode wire. The electrode wire 109 is led out from the electrode wire spool 2013, guided by the pressure roller 2014, limited by the annular guide groove 2015 of the tension roller 2011, and after changing direction by the steering guide roller 204, it extends towards the working fluid tank 102. After passing through the preset position of the turbine disk workpiece in the working fluid tank 102, it circles around the inside of the housing and is guided by the guide roller, finally returning to the electrode wire spool 2013 to form a closed loop, ensuring smooth wire feeding without jamming or overlapping.

[0037] The tension wheel 2011 has a hollow structure, with a central rotating shaft 203 fixed at its center, forming a hollow annular space between them. This hollow annular space constitutes the internal cooling circulation channel 202. The central rotating shaft 203 is made of high-strength alloy material and serves as both the rotation support base for the tension wheel 2011 and the coolant guide channel. It can rotate with the tension wheel 2011, and a coolant guide channel 209 is provided inside the central rotating shaft 203.

[0038] The rotary joint 210 is a Jingpei LPPL00002L type dual-channel pure fluid precision rotary joint, which is divided into an outer stationary ring with a liquid inlet and an inner moving ring with a liquid outlet. The output shaft of the drive motor 2012 is fixed to the tension wheel 2011 through the inner moving ring. The coolant tank 107 is connected to the liquid inlet of the rotary joint 210 through the delivery pipe 211. The liquid outlet of the rotary joint 210 is connected to the liquid guiding channel 209 and then connected to the internal cooling circulation channel 202. The tension wheel 2011 is located at one end of the collection cover 207 and has multiple water-throwing holes 206 evenly opened. The water-throwing holes 206 are connected to the internal cooling circulation channel 202.

[0039] The collection cover 207 has a sealed structure and receives the coolant thrown out from the water-throwing hole 206. The bottom of the collection cover 207 is provided with a water collection tank 208, which is connected to a discharge pipe 205. The scattered dripping coolant can be collected, channeled into the discharge pipe 205, and finally discharged to an external liquid treatment container to avoid liquid accumulation and overflow, thus realizing the recycling of coolant.

[0040] like Figure 8 Figure 9As shown, the electrical connection assembly 3 includes a fixed plate 301, a support plate 302, a conductive brush ball 303, a conductive rubber rod 304, a spring 305, and a wear-resistant sleeve 306. The specific structure of the electrical connection assembly 3 is as follows: the support plate 302 is vertically fixed inside the housing, the fixed plate 301 is installed on the top of the support plate 302, the conductive rubber rod 304 is installed inside the fixed plate 301, and the inner wall of the fixed plate 301 is provided with sliding holes equal in number to the conductive rubber rod 304. The conductive rubber rod 304 is slidably disposed in the sliding holes. The conductive rubber rod 304 is made of conductive silicone rubber and has both conductive and elastic buffering functions. The top of the conductive rubber rod 304 is connected to the conductive brush ball 303, and the spring 305 is sleeved on the conductive rubber rod 304. One end of the spring 305 abuts against the conductive brush ball 303, and the other end abuts against the fixed plate 301. The conductive brush ball 303 is made of silver graphite composite material, which can adaptively conform to the surface of the electrode wire 109, increase the conductive contact area, reduce the contact resistance, and weaken the discharge arcing.

[0041] like Figure 10 As shown, a wear-resistant sleeve 306 is fitted on the outside of the conductive brush ball 303. The wear-resistant sleeve 306 is made of conductive polytetrafluoroethylene material, which isolates the friction of metal components and reduces wear and debris. The spring 305 provides a constant preload force to adapt to the vibration and slight deviation of the electrode wire 109, ensuring stable contact of the conductive brush ball 303 and reliable signal transmission.

[0042] like Figure 8 and Figure 9 As shown, the monitoring and control component 4 includes an insulating base 401, a copper ring 402, and a copper braided strip 403.

[0043] An insulating base 401 is installed inside the housing. A high-strength insulating engineering plastic copper ring 402 is installed on the insulating base 401, providing a stable mounting base for the copper ring 402 and preventing leakage and cross-current. The copper ring 402 serves as the main power supply circuit and is electrically connected to the external high-frequency pulse power supply. The copper ring 402 is flexibly electrically connected to the fixed plate 301 through a copper braided strip 403 made of multiple strands of purple copper wire, which adapts to assembly deviations and vibration displacements, and avoids rigid connection breakage and poor contact.

[0044] like Figure 2 As shown, the monitoring and control component 4 also includes a control valve 404 and a flow meter 405. The control valve 404 and the flow meter 405 are installed on both the connecting pipe 108 and the delivery pipe 211. A temperature sensor is also installed on the fixed plate 301 to monitor the temperature of the electrode wire 109. The flow meter 405 collects the coolant flow parameters in real time and feeds them back to the operator. The operator controls the control valve 404 according to the temperature of the electrode wire 109 to adjust the pipe opening. When there is a high risk of overheating, the valve is opened wider to increase the flow rate and enhance cooling to ensure that the electrode wire 109 is within the normal operating temperature range.

[0045] Working principle: (1) Clamping and preparation of workpiece: First, through the clamping and moving unit in the cutting machine body 1, the threaded rod 101, the fixed plate 104, the slide rod 105, the moving part 106 and the electric push rod 111 work together to accurately and stably clamp and fix the high temperature alloy turbine disk workpiece in the working liquid tank 102, and connect the workpiece to the negative terminal of the high frequency pulse power supply outside the device.

[0046] (2) Cutting operation: Subsequently, the wire guide assembly 2 is started, and the drive motor 2012 drives the tension wheel 2011 to rotate through the rotary joint 210. The electrode wire 109 is led out from the electrode wire spool 2013, elastically pressed by the pressure roller 2014, radially limited and axially constrained by the annular guide groove 2015 on the outer wall of the tension wheel 2011, and then extended to the working fluid tank 102 after being turned by the steering guide wheel 204. After passing through the turbine disk tenon groove processing position, a closed loop is formed, ensuring that the electrode wire 109 feeds smoothly, with constant tension and no slippage, jumping, or wire stacking or tangling. At the same time, the coolant in the coolant tank 107 is cooled. After the coil and the heat exchange tube exchange heat and cool down, one path is transported through the connecting pipe 108 to the nozzle 110 at the upper wire frame 103, and precisely sprayed onto the machining station of the electrode wire 109 and the turbine disk workpiece to achieve direct cooling and chip removal. The other path is introduced through the conveying pipe 211 and the rotary joint 210 into the internal cooling circulation channel 202 inside the tension wheel 2011 to internally cool the tension wheel 2011. The coolant after absorbing heat is thrown out through the water throwing hole 206 on the tension wheel 2011, collected by the collection cover 207 and flowed into the water collection tank 208, and then transported to the external processing container through the discharge pipe 205 to complete the coolant circulation and recycling.

[0047] (3) Temperature monitoring and coolant flow control: The high-frequency pulse power supply is connected to the fixed plate 301 through the copper ring 402 and the copper braided belt 403. Under the pre-tightening force of the spring 305, the conductive rubber rod 304 in the fixed plate 301 makes the conductive brush ball 303 adhere to the surface of the electrode wire 109, stably transmitting the high-frequency pulse current. The wear-resistant sleeve 306 reduces friction and wear, ensuring the reliability of conductive contact. The flow meter 405 collects the two coolant flow parameters in real time, and the temperature sensor monitors the working temperature of the electrode wire 109 in real time. The operator adjusts the opening of the control valve 404 according to the monitoring data to dynamically adjust the coolant flow, ensuring that the electrode wire 109 and key components are in the normal working temperature range, and finally achieves stable and efficient wire cutting of the high-temperature alloy turbine disk tenon groove.

Claims

1. A wire EDM (Electrical Discharge Machining) device for turbine disks, characterized in that, The device includes a cutting machine body (1), a wire feeding guide assembly (2), an electrical connection assembly (3), and a monitoring and control assembly (4). The cutting machine body (1) serves as the supporting carrier for the entire device. The wire feeding guide assembly (2), the electrical connection assembly (3), and the monitoring and control assembly (4) are all fixedly installed on the cutting machine body (1). The cutting machine body (1) includes a housing, on which a working fluid tank (102) is provided. The working fluid tank (102) is the processing station for the turbine disk workpiece, and a clamping and moving unit is provided inside. The wire guiding assembly (2) is positioned directly above the working fluid tank (102) and includes a wire feeding component (201). The wire feeding component (201) includes a tension wheel (2011), a drive motor (2012), an electrode wire spool (2013), a pressure roller (2014), and an annular guide groove (2015). The drive motor (2012) is fixedly installed inside the housing, and the output shaft of the drive motor (2012) is fixedly connected to one end of the tension wheel (2011) via a rotary joint (210). The tension wheel (2011) is further... One end is rotatably connected to the collection hood (207); a pressure roller (2014) is also rotatably arranged inside the housing. The pressure roller (2014) and the tension roller (2011) are arranged in parallel and cooperate with each other to elastically press and limit the electrode wire (109). The outer wall of the tension roller (2011) has multiple annular guide grooves (2015) to limit and constrain the electrode wire (109). A steering guide wheel (204) is also rotatably arranged inside the housing to turn the electrode wire (109) and guide it to the direction of the working liquid tank (102); the rotating part inside the housing... An electrode spool (2013) is mounted on the device for winding and storing the electrode wire (109). The electrode wire (109) is drawn out from the electrode spool (2013), guided by the pressure roller (2014), limited by the annular guide groove (2015) of the tension roller (2011), and after changing direction by the steering guide wheel (204), it extends towards the working fluid tank (102), passes through the preset position of the turbine disk workpiece in the working fluid tank (102), circles around the inner side of the housing, is guided by the guide wheel, and finally passes back to the electrode spool (2013) to form a closed loop.

2. The wire EDM machining device for turbine disks according to claim 1, characterized in that, The clamping and moving unit consists of a threaded rod (101), a fixed plate (104), a slide rod (105), a moving part (106), and an electric push rod (111). The moving part (106) is slidably disposed in the working fluid tank (102). The threaded rod (101) is threadedly connected to the moving part (106). The fixed plate (104) is rotatably disposed on the threaded rod (101). The slide rod (105) passes through the moving part (106) and is slidably connected to the moving part (106). The slide rod (105) is fixedly connected to the fixed plate (104). The electric push rod (111) is fixedly disposed in the working fluid tank (102). The telescopic end of the electric push rod (111) is fixedly connected to the moving part (106). The clamping and moving unit is used to clamp and fix the turbine disk workpiece and adjust its displacement during the processing.

3. The wire EDM machining apparatus for a turbine disk according to claim 2, characterized in that, A coolant tank (107) is fixedly installed on the top of the housing. The outer surface of the coolant tank (107) is connected to a coolant fixing pipe, which is connected to an external liquid storage tank. The coolant tank (107) is equipped with a cooling coil and a heat dissipation pipe. A wire feeder (103) is provided on the housing directly above the working liquid tank (102). A nozzle (110) is installed on the wire feeder (103). A connecting pipe (108) is provided on the side of the coolant tank (107). The end of the connecting pipe (108) is connected to the nozzle (110). The nozzle (110) sprays directly at the electrode wire (109) and can accurately spray low-temperature coolant to directly cool and remove chips from the machining station of the electrode wire (109) and the turbine disk workpiece.

4. The wire EDM machining device for a turbine disk according to claim 3, characterized in that, The wire guide assembly (2) further includes an internal cooling circulation channel (202), an intermediate rotating shaft (203), a steering guide wheel (204), a discharge pipe (205), a water-throwing hole (206), a collection cover (207), a water collection tank (208), a liquid guiding channel (209), a rotary joint (210), and a delivery pipe (211). The tension wheel (2011) has a hollow structure, with the intermediate rotating shaft (203) fixed at its center, forming a hollow annular space between them. This hollow annular space constitutes the internal cooling circulation channel (202), and the liquid guiding channel (209) is provided inside the intermediate rotating shaft (203). The rotary joint (210) is divided into an outer stationary ring with a liquid inlet and an inner moving ring with a liquid outlet. The output shaft of the drive motor (2012) is fixed to the tension wheel (2011) through the inner moving ring. The coolant tank (107) is connected to the liquid inlet of the rotary joint (210) through the delivery pipe (211). The liquid outlet of the rotary joint (210) is connected to the liquid guide channel (209) and then connected to the internal cooling circulation channel (202). The tension wheel (2011) is located at one end of the collection cover (207) and has multiple water-throwing holes (206) evenly opened. The water-throwing holes (206) are connected to the internal cooling circulation channel (202).

5. The wire EDM machining apparatus for a turbine disk according to claim 4, characterized in that, The collection hood (207) has a sealed structure and receives the coolant thrown out from the water-throwing hole (206). The bottom of the collection hood (207) is provided with a water collection tank (208), which is connected to a discharge pipe (205) to collect the scattered dripping coolant, direct it into the discharge pipe (205), and finally discharge it to an external liquid treatment container.

6. The wire EDM machining apparatus for a turbine disk according to claim 5, characterized in that, The electrical connection assembly (3) includes a fixed plate (301), a support plate (302), a conductive brush ball (303), a conductive rubber rod (304), a spring (305), and a wear-resistant sleeve (306). The structure of the electrical connection assembly (3) is as follows: the support plate (302) is vertically fixed inside the housing, the fixed plate (301) is installed on the top of the support plate (302), the conductive rubber rod (304) is installed inside the fixed plate (301), and the inner wall of the fixed plate (301) is provided with conductive rubber rods. The rod (304) has an equal number of sliding holes. The conductive rubber rod (304) is slidably installed in the sliding holes. The conductive rubber rod (304) is made of conductive silicone rubber. The top of the conductive rubber rod (304) is connected to the conductive brush ball (303). The spring (305) is sleeved on the conductive rubber rod (304). One end of the spring (305) abuts against the conductive brush ball (303) and the other end abuts against the fixed plate (301). The conductive brush ball (303) is attached to the surface of the electrode wire (109).

7. The wire EDM machining apparatus for a turbine disk according to claim 6, characterized in that, The conductive brush ball (303) is fitted with a wear-resistant sleeve (306) on the outside, and the wear-resistant sleeve (306) is made of conductive polytetrafluoroethylene.

8. The wire EDM machining apparatus for a turbine disk according to claim 7, characterized in that, The monitoring and control component (4) includes an insulating base (401), a copper ring (402), and a copper braided strip (403). The insulating base (401) is installed inside the housing, and the copper ring (402) is installed on the insulating base (401). The copper ring (402) serves as the main power supply circuit and is electrically connected to an external high-frequency pulse power supply. The copper ring (402) is flexibly electrically connected to the fixed plate (301) through a copper braided strip (403) woven from multiple strands of copper wire.

9. The wire EDM machining apparatus for a turbine disk according to claim 8, characterized in that, The monitoring and control component (4) also includes a control valve (404) and a flow meter (405). The connecting pipe (108) and the delivery pipe (211) are both equipped with control valves (404) and flow meters (405). A temperature sensor is also provided on the fixed plate (301) to monitor the temperature of the electrode wire (109).

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