Aero-engine stator multi-station wire cutting equipment

Abstract

The application provides an aero-engine stator multi-station wire cutting device, and relates to the technical field of wire cutting machining, which comprises a wire cutting machine tool body, a plurality of tensioning wheels are arranged at the plurality of stations, a first sleeve is connected below each tensioning wheel, a piston plate is arranged in the first sleeve, the lower end of the piston plate is an oil storage cavity, hydraulic oil is stored in the cavity and a first spring is arranged in the cavity, a one-way valve and a damping hole are arranged in parallel at the bottom of the oil storage cavity, the oil storage cavities of the stations are interconnected, when the tension of the electrode wire of any station increases, the piston plate compresses the hydraulic oil, the one-way valve opens in the forward direction, and the hydraulic oil is quickly discharged into the oil storage cavities of other stations; when the hydraulic oil enters other stations, the one-way valve reversely stops, and only slowly flows into through the damping hole, so that the tensioning wheel slowly moves upward to realize compensatory tensioning. According to the scheme, the stress peak value of the fault station is released through quick discharge to reduce the wire breaking rate, the wire is prevented from being broken through slow feeding and gentle compensation, the electrode wire tension of the stations is balanced through parallel pressure of the oil storage cavities of the stations, and the cutting seam width is ensured to be consistent.

Description

Technical Field

[0001] This invention relates to the field of wire electrical discharge machining technology, and in particular to a multi-station wire cutting device for aero-engine stators. Background Technology

[0002] Aero-engine stator components, such as integral blade rings and stator blade rings, are mostly manufactured from difficult-to-machine materials such as high-temperature alloys or titanium alloys. The blade channel structure is complex, requiring extremely high machining precision. Wire electrical discharge machining (EDM) has become the core machining method for these parts due to its non-contact etching characteristics. To improve efficiency, existing multi-station wire EDM equipment uses multiple independent machining heads arranged circumferentially around the annular workpiece, with each head simultaneously cutting different blade channels in parallel.

[0003] In multi-station parallel machining, the tension of the electrode wires at each station can be inconsistent due to factors such as differences in guide wheel resistance, uneven wear of conductive blocks, and accumulation of eroded material in the cutting slits. This can easily lead to wire breakage and inconsistent cutting slit widths at each station, ultimately affecting the machining accuracy of the blade passage. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and to propose a multi-station wire cutting equipment for aero-engine stators.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A multi-station wire cutting equipment for aero-engine stators includes a wire cutting machine body, with tensioning wheels at multiple stations for tensioning electrode wires. Each tensioning wheel is connected to a first sleeve, which houses a piston plate. The lower end of the piston plate serves as an oil reservoir containing hydraulic oil and equipped with a first spring. A one-way valve (forward conduction, reverse cut-off) and a damping orifice are connected in parallel at the bottom of the oil reservoir. The oil reservoirs at each station are connected in parallel via hydraulic pipelines. When the electrode wire tension at any station increases, pushing the tensioning wheel downwards, the piston plate at that station compresses the hydraulic oil, causing the one-way valve to open forwards and rapidly discharge the hydraulic oil into the oil reservoirs of other stations. When the hydraulic oil enters the oil reservoirs of other stations, the one-way valve closes in reverse, allowing the oil to flow slowly only through the damping orifice, pushing the piston plate and tensioning wheel upwards slowly for compensatory tensioning.

[0006] Preferably, the piston plate is slidably connected to the inner surface of the first sleeve, a connecting rod is fixedly connected to the middle of the upper end of the piston plate, a U-shaped plate is fixedly connected to the upper end of the connecting rod, the tensioning wheel is rotatably connected to the inner side of the U-shaped plate through a positioning pin, and the oil storage chamber is formed by the bottom end of the piston plate and the inner wall of the first sleeve.

[0007] Preferably, the one-way valve includes a fixed block, a conical hole, a metal ball, and an elastic component. The fixed block is coaxially fixed on the inner wall of the oil storage chamber. The conical hole is opened in the middle of the fixed block. The metal ball is disposed on the central axis of the conical hole. The elastic component is connected between the bottom end of the metal ball and the inner bottom surface of the oil storage chamber.

[0008] Preferably, the elastic component includes a second sleeve, a telescopic rod, a fixing ring, and a second spring. The bottom end of the second sleeve is fixedly connected to the middle of the inner bottom surface of the oil storage cavity. The telescopic rod is slidably connected to the inner surface of the second sleeve. The upper end of the telescopic rod is fixedly connected to the bottom end of the metal ball. The fixing ring is fixedly disposed on the outer side of the telescopic rod. The second spring is tightly connected between the bottom end of the fixing ring and the inner bottom surface of the oil storage cavity.

[0009] Preferably, the first spring is fastened between the bottom end of the piston plate and the upper end of the fixing block, the damping hole is opened inside the fixing block, and the central axis of the damping hole is parallel to the central axis of the tapered hole.

[0010] Preferably, under normal conditions, the second spring drives the metal ball to seal the tapered hole.

[0011] Preferably, the lower side wall of the oil storage cavity is fixedly connected to an oil delivery hose, and the ends of the multiple oil delivery hoses opposite to the first sleeve are fixedly connected to a circular box. The circular box stores hydraulic oil, and the circular box is connected to the wire cutting machine body through a bracket.

[0012] Preferably, the wire cutting machine body is further provided with a linear guide rail at multiple workstations, and a machine frame is fixed on the slide of the linear guide rail, with the first sleeve fixed on the end of the machine frame.

[0013] Preferably, a positioning plate is provided on the worktable of the wire cutting machine body, and the positioning plate is used to position the stator of the aero-engine.

[0014] Compared with the prior art, the beneficial effects of the present invention are: 1. When the tension of the electrode wire spikes instantaneously due to the tension wheel jamming or the accumulation of erosion material in the kerf at a certain station, the hydraulic oil in the oil storage chamber at that station is pushed open by the high pressure and discharged quickly through the main channel at a high flow rate. This allows the piston plate and tension wheel to move down quickly without obstruction, and the peak stress of the electrode wire is released before it exceeds the tensile strength, thereby effectively reducing the wire breakage rate in sudden tension events. 2. When the discharged high-pressure hydraulic fluid is diverted to other normal workstations, the check valve is forcibly closed in reverse, blocking the main channel. The hydraulic oil can only slowly flow into the oil storage chambers of other workstations through the damping orifice, pushing the piston plate and tensioning wheel to complete the compensatory tensioning in a slow manner. This damping effect smooths out the instantaneous pressure pulse of the faulty workstation, making the tension compensation action of other workstations delayed and smooth, avoiding reverse wire breakage caused by overcompensation due to rigid coupling; 3. The oil storage chambers of each station are connected in parallel. An increase in tension at one station forces the other stations to synchronously follow to the same pressure level. Under the action of hydraulic pressure equalization, the tension of the electrode wires at each station passively tends to be balanced. Since the size of the discharge gap is directly related to the electrode wire tension, this pressure equalization mechanism achieves online, non-discriminatory equalization of the electrode wire tension at multiple stations, thereby ensuring a high degree of consistency in the kerf width of all stations throughout the entire processing cycle. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the multi-station wire cutting equipment for aero-engine stators according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the circular box structure in the multi-station wire cutting equipment for aero-engine stators according to an embodiment of the present invention; Figure 3 This is a schematic diagram of the internal structure of the first sleeve in the multi-station wire cutting equipment for aero-engine stators according to an embodiment of the present invention; Figure 4 This is a schematic diagram of the tapered hole not being opened in the multi-station wire cutting equipment for aero-engine stators according to an embodiment of the present invention; Figure 5 This is a schematic diagram of the open state of the conical hole in the multi-station wire cutting equipment for aero-engine stators according to an embodiment of the present invention; Figure 6 This is a schematic diagram of the positioning disk structure in the multi-station wire cutting equipment for aero-engine stators according to an embodiment of the present invention; Figure 7 for Figure 1 Enlarged view of the structure at point A in the image; Figure 8 for Figure 3 Enlarged view of the structure at point B in the image.

[0016] In the diagram: 100, wire EDM machine body; 101, linear guide rail; 102, frame; 103, positioning plate; 200, first sleeve; 201, piston plate; 202, connecting rod; 203, U-shaped plate; 204, tensioning wheel; 205, first spring; 300, fixing block; 301, tapered hole; 302, second sleeve; 303, telescopic rod; 304, metal ball; 305, fixing ring; 306, second spring; 307, damping hole; 308, oil hose; 309, circular box. Detailed Implementation

[0017] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0018] The terms used in this invention, such as "upper," "lower," "left," "right," "middle," and "one," are merely for clarity of description and are not intended to limit the scope of the invention. Any changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of the invention.

[0019] like Figures 1-8 As shown, this embodiment of the invention provides a multi-station wire cutting equipment for aero-engine stators, including a wire cutting machine body 100. Tensioning rollers 204 for tensioning electrode wires are provided at multiple stations. A first sleeve 200 is connected below each tensioning roller 204. A piston plate 201 is provided inside the first sleeve 200. The lower end of the piston plate 201 is a reservoir containing hydraulic oil and equipped with a first spring 205. A forward-guiding and reverse-guiding opening is connected in parallel at the bottom of the reservoir. The system includes a one-way valve and a damping orifice 307; the oil storage chambers of each station are connected in parallel via hydraulic pipelines; when the tension of the electrode wire at any station increases and pushes the tensioning wheel 204 downward, the piston plate 201 at that station compresses the hydraulic oil, and the one-way valve opens in the forward direction, allowing the hydraulic oil to be quickly discharged into the oil storage chambers of other stations; when the hydraulic oil enters the oil storage chambers of other stations, the one-way valve closes in the reverse direction, and the oil flows in slowly only through the damping orifice 307, pushing the piston plate 201 and the tensioning wheel 204 to slowly move upward for compensatory tensioning.

[0020] In this embodiment, when the tension of the electrode wire spikes instantaneously due to the tension wheel 204 jamming or the accumulation of erosion material in the kerf at a certain station, the tension wheel 204 at that station is pressed and moves vertically downward, pushing the piston plate 201 downward and squeezing the hydraulic oil and the first spring 205 in the oil storage chamber. The pressure in the oil storage chamber rises rapidly. Under the pressure drive, the hydraulic oil pushes open the check valve in the forward direction. The check valve opens to form the main channel, and the hydraulic oil is discharged quickly through the main channel at a high flow rate, so that the tension wheel 204 can move down quickly to release the stress of the electrode wire and reduce the wire breakage rate. The discharged high-pressure oil is simultaneously diverted to other normal work stations. When the hydraulic oil enters the oil storage chamber of other work stations, the flow direction is reversed. The check valve is forcibly closed, the main channel is blocked, and the hydraulic oil can only flow slowly upward through the damping hole 307, pushing the piston plate 201 of that work station to move slowly upward, and then pushing the tensioning wheel 204 to move slowly upward, so as to complete the compensatory tensioning in a slow manner and avoid reverse wire breakage caused by rapid compensation. The oil storage chambers of each station are connected in parallel. When the tension of one station increases, the other stations are forced to follow the same pressure level synchronously. The tension of the electrode wires at each station is then balanced, thus ensuring a high degree of consistency in the kerf width of all stations throughout the entire processing cycle.

[0021] like Figure 1 , Figure 3 and Figure 7 As shown, optionally, the piston plate 201 is slidably connected to the inner surface of the first sleeve 200, a connecting rod 202 is fixedly connected to the middle of the upper end of the piston plate 201, a U-shaped plate 203 is fixedly connected to the upper end of the connecting rod 202, and the tensioning wheel 204 is rotatably connected to the inner side of the U-shaped plate 203 through a positioning pin. The oil storage chamber is formed by the bottom end of the piston plate 201 and the inner wall of the first sleeve 200.

[0022] Specifically, the piston plate 201 is slidably connected to the inner surface of the first sleeve 200, and a sealing ring is provided between the two to ensure the sealing of the oil storage chamber, so that hydraulic oil can only enter and exit through the one-way valve and the damping hole 307. The tension wheel 204 can rotate freely around the positioning pin to cooperate with the high-speed wire feeding movement of the electrode wire. When the tension of the electrode wire changes, the tension wheel 204 transmits the force to the piston plate 201 through the U-shaped plate 203 and the connecting rod 202, driving the piston plate 201 to slide up and down along the inner wall of the first sleeve 200, changing the volume of the oil storage chamber, and realizing the conversion of tension fluctuation into hydraulic signal.

[0023] In this optional embodiment, the tensioning wheel 204 is directly connected to the piston plate 201 via the U-shaped plate 203 and the connecting rod 202, and the force transmission path is from the tensioning wheel 204 to the U-shaped plate 203 to the connecting rod 202 to the piston plate 201.

[0024] like Figure 3 and Figure 8 As shown, optionally, the one-way valve includes a fixed block 300, a conical hole 301, a metal ball 304, and an elastic component. The fixed block 300 is coaxially fixed on the inner wall of the oil storage chamber. The conical hole 301 is opened in the middle of the fixed block 300. The metal ball 304 is disposed on the central axis of the conical hole 301. The elastic component is connected between the bottom end of the metal ball 304 and the inner bottom surface of the oil storage chamber.

[0025] Specifically, a conical hole 301 is opened in the middle of the fixed block 300, serving as the main channel for the forward flow of hydraulic oil. A metal ball 304 is positioned on the central axis of the conical hole 301. The diameter of the metal ball 304 is larger than the minimum aperture of the conical hole 301, allowing it to completely seal the conical hole 301 when closed. An elastic component is connected between the bottom end of the metal ball 304 and the inner bottom surface of the oil reservoir, providing a pre-tightening force for the metal ball 304 to press the conical hole 301 upwards. Under normal conditions, the elastic component drives the metal ball 304 to press tightly against the conical hole 301 to form a seal. When the hydraulic oil pressure in the oil reservoir increases and acts positively on the metal ball 304, the hydraulic pressure overcomes the pre-tightening force of the elastic component, pushing the metal ball 304 downwards, and the conical hole 301 opens to form the main channel.

[0026] In this optional embodiment, the check valve adopts a structure in which a metal ball 304 and a conical orifice 301 cooperate. When the flow is forward, the metal ball 304 is pushed open by the hydraulic pressure, and the conical orifice 301 is open for flow. The flow resistance is minimal, and the hydraulic oil can be discharged quickly in a large flow rate, realizing rapid pressure relief at the faulty workstation and rapidly releasing the stress on the electrode wire. When the flow is reverse, the hydraulic pressure and the force of the elastic component are in the same direction, and together they press the metal ball 304 tightly against the conical orifice 301 to achieve a forced seal, forcing the hydraulic oil to pass only through the damping orifice 307.

[0027] like Figure 3 and Figure 8 As shown, optionally, the elastic component includes a second sleeve 302, a telescopic rod 303, a fixing ring 305, and a second spring 306. The bottom end of the second sleeve 302 is fixedly connected to the middle of the inner bottom surface of the oil storage cavity. The telescopic rod 303 is slidably connected to the inner surface of the second sleeve 302. The upper end of the telescopic rod 303 is fixedly connected to the bottom end of the metal ball 304. The fixing ring 305 is fixedly disposed on the outer side of the telescopic rod 303. The second spring 306 is fastened between the bottom end of the fixing ring 305 and the inner bottom surface of the oil storage cavity.

[0028] Specifically, the telescopic rod 303 is slidably connected to the inner surface of the second sleeve 302 and can slide freely along the axial direction within the second sleeve 302. The upper end of the telescopic rod 303 is fixedly connected to the bottom end of the metal ball 304, supporting the metal ball 304 directly below the conical hole 301. The fixing ring 305 is fixed on the outside of the telescopic rod 303 and located above the upper end face of the second sleeve 302. The second spring 306 pushes the metal ball 304 upward to press against the conical hole 301.

[0029] In this optional embodiment, the second spring 306 provides a preload to the metal ball 304 via the fixed ring 305 and the telescopic rod 303. The magnitude of the preload is determined by the stiffness and initial compression of the second spring 306, allowing for precise setting of the one-way valve's opening pressure. The telescopic rod 303 slides within the second sleeve 302, guiding the movement of the metal ball 304 and preventing it from deviating from the central axis of the tapered orifice 301 during opening and closing, thus ensuring the stability of the valve's operation and the reliability of its seal. When the forward flow pressure overcomes the preload of the second spring 306, the telescopic rod 303 slides downwards along with the metal ball 304, causing the metal ball 304 to disengage from the tapered orifice 301 and opening the main channel. During reverse flow, the hydraulic pressure is in the same direction as the elastic force of the second spring 306, ensuring a forced seal on the valve.

[0030] like Figure 3 As shown, optionally, the first spring 205 is fastened between the bottom end of the piston plate 201 and the upper end of the fixing block 300, and the damping hole 307 is opened inside the fixing block 300, with the central axis of the damping hole 307 being parallel to the central axis of the tapered hole 301.

[0031] Specifically, the damping orifice 307 is a micro-hole penetrating the upper and lower end faces of the fixed block 300. Its diameter is much smaller than the minimum diameter of the tapered orifice 301. The central axis of the damping orifice 307 is parallel to the central axis of the tapered orifice 301. The two are arranged in parallel on the fixed block 300, each independently connecting the upper and lower parts of the oil storage chamber. When the electrode wire tension increases, the piston plate 201 compresses the first spring 205 downward, and the compression of the first spring 205 corresponds to the tension increment. When the tension returns to normal, the first spring 205 pushes the piston plate 201 upward to reset.

[0032] In this optional embodiment, the first spring 205 is disposed between the piston plate 201 and the fixed block 300. The spring force acts directly on the bottom end of the piston plate 201, providing a reference tension setting for the tension wheel 204. The magnitude of the electrode wire tension can be calibrated by the stiffness and pre-compression of the first spring 205. The damping orifice 307 is a normally open micro-orifice. When the one-way valve is open in the forward direction, it provides a flow path together with the main channel of the tapered orifice 301. Although its flow rate is extremely small and negligible, when the flow is reversed, the tapered orifice 301 is closed, and the damping orifice 307 becomes the only channel, limiting the hydraulic oil flow and slowing down the compensation action.

[0033] like Figure 8 As shown, optionally, in the normal state, the second spring 306 drives the metal ball 304 to seal the tapered hole 301.

[0034] Specifically, under normal conditions, when the tension of the electrode wires at each station is within the normal range, the second spring 306 applies an upward thrust to the metal ball 304 through the fixing ring 305 and the telescopic rod 303, driving the metal ball 304 to press tightly against the inner conical surface of the conical hole 301, forming a complete seal on the conical hole 301, preventing hydraulic oil from flowing through the conical hole 301. At this time, the oil storage chambers at each station are only maintained by a weak hydraulic connection through the damping hole 307.

[0035] In this optional embodiment, under normal conditions, the metal ball 304 seals the conical hole 301, so that the oil storage chambers of each station are only weakly connected through the damping hole 307 during normal processing, and each station is relatively independent and does not interfere with each other. When the tension of a certain station abnormally rises and exceeds the opening pressure set by the second spring 306, the one-way valve opens to quickly release pressure, so that the station with abnormal tension is quickly unloaded.

[0036] like Figures 1-3 As shown, optionally, an oil supply hose 308 is fixedly connected to the lower side wall of the oil storage cavity, and multiple oil supply hoses 308 are fixedly connected to a circular box 309 at the end opposite to the first sleeve 200. The circular box 309 stores hydraulic oil and is connected to the wire cutting machine body 100 by a bracket.

[0037] Specifically, an oil delivery hose 308 is fixedly connected to the lower side wall of the oil storage chamber. One end of the oil delivery hose 308 is sealed to the oil port on the side wall of the first sleeve 200, and the other end is connected to a circular box 309. The circular box 309 is fixedly connected to the wire cutting machine body 100 by a bracket. The interior of the circular box 309 is a hollow oil storage space containing hydraulic oil. Multiple oil delivery hoses 308 are led out from the first sleeve 200 of each station and are fixedly connected to the circular box 309, so that the oil storage chambers of each station are connected in parallel through the circular box 309. The oil delivery hoses 308 are made of flexible tubing, which can adapt to the positional deviation of each station and reduce the accuracy requirements of pipeline installation.

[0038] In this optional embodiment, the circular box 309 provides a uniform pressure reference for the oil storage chambers of each workstation. After the hydraulic oil discharged from one workstation enters the circular box 309 through the oil delivery hose 308, the internal pressure of the circular box 309 increases, and the pressure is evenly transmitted to the oil storage chambers of the remaining workstations. The flexible connection of the oil delivery hose 308 adapts to the slight displacement of the mechanical structure of each workstation.

[0039] like Figure 1 As shown, optionally, a linear guide 101 is also provided at multiple workstations of the wire cutting machine body 100. A frame 102 is fixed on the slide of the linear guide 101, and a first sleeve 200 is fixed on the end of the frame 102.

[0040] In this optional embodiment, the first sleeve 200 is mounted on the slide of the linear guide rail 101 via the frame 102, so that the tensioning wheel 204 can be adjusted along the linear guide rail 101 to achieve precise positioning of the processing head at each station. Since this is existing technology, its specific structure and working principle will not be described here.

[0041] like Figure 1 and Figure 6 As shown, optionally, a positioning plate 103 is provided on the worktable of the wire EDM machine body 100, and the positioning plate 103 is used to position the stator of the aero-engine.

[0042] In this optional embodiment, the positioning disk 103 provides a unified positioning reference for the annular stator workpiece. The workpiece remains stationary, while each processing head independently follows its trajectory for machining. This fixed workpiece layout eliminates the inertia and positioning errors caused by workpiece movement, making it particularly suitable for precision wire cutting of large integral blade rings. Each processing head is evenly distributed around the positioning disk 103, simultaneously cutting different blade channels of the stator, achieving true multi-station parallel machining and significantly shortening the overall machining cycle. Since this is existing technology, its specific structure and working principle will not be described in detail here.

[0043] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A multi-station wire cutting equipment for aero-engine stators, comprising a wire cutting machine body (100), and tensioning rollers (204) for tensioning electrode wires at multiple stations, characterized in that, Each tensioning wheel (204) is connected to a first sleeve (200), and a piston plate (201) is provided inside the first sleeve (200). The space at the lower end of the piston plate (201) is an oil storage chamber, which stores hydraulic oil and is provided with a first spring (205). A one-way valve that conducts in the forward direction and cuts off in the reverse direction and a damping hole (307) are connected in parallel at the bottom of the oil storage chamber. The oil storage chambers of each station are connected in parallel through hydraulic pipelines. When the tension of the electrode wire at any station increases and pushes the tensioning wheel (204) to move down, the piston plate (201) of that station compresses the hydraulic oil, and the one-way valve opens in the forward direction to allow the hydraulic oil to be quickly discharged into the oil storage chambers of other stations. When the hydraulic oil enters the oil storage chambers of other stations, the one-way valve cuts off in the reverse direction, and only flows in slowly through the damping hole (307), pushing the piston plate (201) and the tensioning wheel (204) to move slowly upward for compensatory tensioning.

2. The multi-station wire EDM equipment for aero-engine stators according to claim 1, characterized in that, The piston plate (201) is slidably connected to the inner surface of the first sleeve (200). A connecting rod (202) is fixedly connected to the middle of the upper end of the piston plate (201). A U-shaped plate (203) is fixedly connected to the upper end of the connecting rod (202). The tensioning wheel (204) is rotatably connected to the inner side of the U-shaped plate (203) through a positioning pin. The oil storage chamber is formed by the bottom end of the piston plate (201) and the inner wall of the first sleeve (200).

3. The multi-station wire EDM equipment for aero-engine stators according to claim 1, characterized in that, The one-way valve includes a fixed block (300), a conical hole (301), a metal ball (304), and an elastic component. The fixed block (300) is coaxially fixed on the inner wall of the oil storage chamber. The conical hole (301) is opened in the middle of the fixed block (300). The metal ball (304) is disposed on the central axis of the conical hole (301). The elastic component is connected between the bottom end of the metal ball (304) and the inner bottom surface of the oil storage chamber.

4. The multi-station wire EDM equipment for aero-engine stators according to claim 3, characterized in that, The elastic component includes a second sleeve (302), a telescopic rod (303), a fixing ring (305), and a second spring (306). The bottom end of the second sleeve (302) is fixedly connected to the middle of the inner bottom surface of the oil storage cavity. The telescopic rod (303) is slidably connected to the inner surface of the second sleeve (302). The upper end of the telescopic rod (303) is fixedly connected to the bottom end of the metal ball (304). The fixing ring (305) is fixedly disposed on the outside of the telescopic rod (303). The second spring (306) is fastened between the bottom end of the fixing ring (305) and the inner bottom surface of the oil storage cavity.

5. The multi-station wire EDM equipment for aero-engine stators according to claim 4, characterized in that, The first spring (205) is fastened between the bottom end of the piston plate (201) and the upper end of the fixing block (300). The damping hole (307) is opened inside the fixing block (300), and the central axis of the damping hole (307) is parallel to the central axis of the tapered hole (301).

6. The multi-station wire EDM equipment for aero-engine stators according to claim 5, characterized in that, Under normal conditions, the second spring (306) drives the metal ball (304) to seal the tapered hole (301).

7. The multi-station wire cutting equipment for aero-engine stators according to claim 1, characterized in that, The lower side wall of the oil storage chamber is fixedly connected to an oil delivery hose (308). Multiple oil delivery hoses (308) are fixedly connected to a circular box (309) at the end opposite to the first sleeve (200). The circular box (309) stores hydraulic oil. The circular box (309) is connected to the wire cutting machine body (100) by a bracket.

8. The multi-station wire EDM equipment for aero-engine stators according to claim 1, characterized in that, The wire cutting machine body (100) is also provided with a linear guide rail (101) at multiple workstations. A frame (102) is fixed on the slide of the linear guide rail (101), and the first sleeve (200) is fixed on the end of the frame (102).

9. The multi-station wire EDM equipment for aero-engine stators according to claim 1, characterized in that, The worktable of the wire cutting machine body (100) is provided with a positioning plate (103), which is used to position the stator of the aero-engine.

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