A machining device for an aero-engine guard plate

Abstract

The application belongs to the technical field of punching processing equipment, and particularly relates to a processing device for a guard plate of an aero-engine, which comprises a punching lower die, a guard plate die cavity is formed in the punching lower die, a punching through hole is formed in the cavity wall of the guard plate die cavity, a U-shaped bottom plate is fixedly connected to the lower surface of the punching lower die, and a punching outer die is movably connected to the upper surface of the punching lower die. The device has the functions of primary punching and fine polishing and reaming for the guard plate of the aero-engine, and the subsequent polishing is used to remove the rough hole wall and the tiny crack defects generated in the punching processing of the guard plate, so that the inner wall of the punched guard plate is smooth and free of stress concentration. Meanwhile, the device has the function of cleaning, so that the debris is prevented from scratching the surface of the aero-engine guard plate in the subsequent processing, thereby improving the processing quality and the qualified rate of the device for the aero-engine guard plate and improving the reliability of the subsequent use of the guard plate.

Description

Technical Field

[0001] The invention belongs to the technical field of punching processing equipment, and in particular relates to a processing device for a guard plate for an aero-engine. Background Art

[0002] Aircraft engines are the core power units of aircraft, generating thrust through fuel combustion. They are mainly divided into piston and jet types. They are key technical equipment in the aviation industry. In order to sense the internal operating status of aircraft engines in real time, multiple sensors (such as temperature sensors) need to be installed inside the aircraft engines. Due to the high temperature inside the engine, to ensure the safe operation of the sensors, a protective plate needs to be installed at the front end of the sensors to isolate them from high-temperature damage. The protective plate needs to have mounting holes that precisely match the shape of the sensors. In order to improve the efficiency of hole processing, the opening of such holes is usually completed by punching.

[0003] At present, when aircraft engine guard plates are processed by punching equipment, due to the special requirements of the engine working environment, the guard plates must have local high strength and high protection performance. Such materials often have high toughness and relatively low elastic modulus. Therefore, during the punching process, when the primary punching head applies instantaneous high-intensity impact force to the guard plate, tiny cracks may appear in the guard plate holes due to uneven stress distribution during the material deformation process. Such tiny cracks are difficult to detect through manual inspection, which not only leads to increased roughness in the guard plate holes, but also causes stress concentration at the local protrusions on the inner wall of the hole. With the continuous vibration of the aircraft engine during operation, the concentrated stress at the hole will gradually cause cracking defects, which not only reduces the processing quality of the guard plate holes, but also affects the long-term stability of the guard plate, while reducing the qualified rate of the guard plate produced by the processing equipment.

[0004] In addition, if the tiny particles generated by punching during the punching process of the guard plate are not cleaned in time, and as the accumulated amount increases, they will scratch the surface of the guard plate that is subsequently processed, thereby affecting the reliability and quality of the guard plate processing in the processing device.

[0005] Therefore, a processing device for an aircraft engine guard plate is proposed to solve the above problems. Summary of the Invention

[0006] The object of the present invention is to provide a processing device for an aircraft engine guard plate in view of the above problems.

[0007] In order to achieve the above object, the following technical scheme is adopted in the present application: The machining device for the guard plate of an aero-engine comprises a punching lower die, a guard plate die cavity is formed in the inside of the punching lower die, a punching through hole is formed in the cavity wall of the guard plate die cavity, a U-shaped bottom plate is fixedly connected to the lower surface of the punching lower die, a punching outer die is movably connected to the upper surface of the punching lower die, a through hole is formed in the upper surface of the punching outer die, and a punching mechanism is fixedly connected to the hole wall of the through hole.

[0008] A U-shaped connecting plate is fixedly connected to the upper surface of the punching outer die, a plurality of threaded blind holes are formed in the upper surface of the U-shaped connecting plate, and a cleaning mechanism is fixedly connected to the outer wall of the U-shaped connecting plate.

[0009] A connecting groove is formed in the bottom end outer wall of the punching outer die, and a touch pressure switch is fixedly connected to the groove wall of the connecting groove, and the button of the touch pressure switch is located on the side close to the punching lower die.

[0010] Positioning mechanisms are fixedly connected to the two side outer walls of the punching outer die.

[0011] An inner die is movably connected to the inner wall of the punching outer die, two L-shaped grooves are formed in the lower surface of the inner die, and two symmetrically distributed positioning columns are fixedly connected to the upper surface of the inner die.

[0012] In the machining device for the guard plate of an aero-engine, the punching mechanism comprises an electric hydraulic rod fixedly embedded at the top end of the punching outer die, a connecting cover is fixedly connected to the moving end of the electric hydraulic rod, an outer cover is fixedly connected to the side wall of the connecting cover through bolts, the outer wall of the outer cover is fixedly connected to the through hole inner wall of the inner die, a driving motor is fixedly connected to the inner wall of the outer cover through bolts, the output end of the driving motor penetrates through the lower surface of the outer cover, the lower surface of the outer cover is provided with a mounting through hole matched with the driving motor, the output end of the driving motor is fixedly connected to a fixed rod through a shaft coupling, a primary punching head is fixedly connected to the bottom end of the fixed rod, a grinding conical sleeve is fixedly sleeved to the bottom end of the fixed rod, and a plurality of air holes are formed in the outer walls of the outer cover and the connecting cover.

[0013] In the machining device for the guard plate of an aero-engine, a guide inclined surface is formed in the bottom of the grinding conical sleeve, the grinding level of the grinding conical sleeve at the guide inclined surface is 800 mesh, and the grinding level of the top of the grinding conical sleeve is 2000 mesh.

[0014] In the machining device for the guard plate of an aero-engine, the hole wall of the punching through hole is fixedly connected to a limiting bearing matched with the primary punching head and a material guiding inclined ring.

[0015] In the above-mentioned processing device for an aircraft engine guard plate, a supporting groove is provided at the bottom end of the through hole of the inner mold, and the groove wall of the supporting groove is movably connected to two positioning rods, and the side ends of the two positioning rods are fixedly connected to the rod wall of the fixing rod.

[0016] In the above-mentioned processing device for the aircraft engine guard plate, two L-shaped through holes are opened on the hole wall of the punching through hole, and the top ends of the L-shaped through holes are connected to the top of the punching lower die.

[0017] In the above-mentioned processing device for a guard plate for an aircraft engine, the positioning mechanism includes a limiting ring fixedly connected to the outer wall of the punching outer mold, the inner wall of the limiting ring is movably connected to a guide column, the bottom end of the guide column is fixedly connected to a fixed block, and the side wall of the fixed block is fixedly connected to the outer wall of the U-shaped bottom plate.

[0018] In the above-mentioned processing device for a guard plate for an aircraft engine, the cleaning mechanism includes an air pump fixedly connected to the outer wall of the U-shaped connecting plate, a filter screen cover fixedly connected to the outer wall at the air inlet end of the air pump, the lower surface of the filter screen cover is in close contact with the upper surface of the punching outer mold, the air outlet end of the air pump is fixedly connected to a delivery pipe, the air outlet end of the delivery pipe passes through the inner wall of the punching outer mold, the lower surface of the U-shaped bottom plate is fixedly connected to a connecting ring, the outer wall of the connecting ring is sleeved with a filter bag, and the top outer wall of the filter bag is clamped with a limiting clamp.

[0019] Compared with the existing technology, the advantages of a processing device for an aircraft engine guard plate are:

[0020] Through the punching mechanism, positioning mechanism, punching lower die and punching outer die, when the guard plate for installing the sensor in the aircraft engine needs to be punched, the punching processing device for the aircraft engine guard plate is first installed on the punching machine, and then the punching machine control box controls the punching moving end of the punching machine to drive the punching outer die to move down, so that the punching outer die moves down and closes with the punching lower die. In the process of the punching outer die moving down, the positioning mechanism is used to limit the position and ensure the punching accuracy. While the punching outer die moves down, the cleaning mechanism also works. And generate airflow to clean the guard plate blank, and constrain the guard plate blank. When the punching outer die and the punching lower die are completely closed, the primary punching head on the fixed rod can complete the initial punching of the guard plate blank. Through the preliminary punching, the hole wall material is prevented from cracking due to the one-step punching, and the inner wall of the punching is further prevented from increasing the roughness and cracking tiny gaps. This mechanism enables the guard plate processing device for aircraft engines to have the function of primary punching processing, and avoids the hole wall material from cracking due to the one-step punching, which affects the smoothness and quality of the inner wall of the guard plate punching.

[0021] When the punch outer die contacts the punch lower die, the touch switch is turned on, and an electrical signal is sent to the control box of the punch. Then the control box controls the driving motor and the electric hydraulic rod to work for 2 minutes. The driving motor drives the polishing conical sleeve to rotate through the shaft coupling and the fixed rod. When the electric hydraulic rod is started, the moving end of the electric hydraulic rod pushes the inner die down and drives the fixed rod and the primary punch head down. Then the guide slope of the polishing conical sleeve is inserted into the punch inner wall of the guard plate to roughen the punch inner wall of the guard plate to 800 mesh. As the moving end of the electric hydraulic rod gradually moves down, the top of the polishing conical sleeve is inserted into the punch inner wall of the guard plate. At this time, the punch inner wall of the guard plate is finely polished to 2000 mesh. The polishing conical sleeve can remove the small cracks on the punch inner wall of the guard plate and improve the smoothness of the punch inner wall of the guard plate. The device has the function of fine polishing and reaming of the guard plate of the aircraft engine, and the subsequent polishing removes the rough hole wall and small crack defects generated during the machining of the guard plate punch. The punch inner wall of the guard plate is smooth and stress-free, which improves the quality of the aircraft engine guard plate machining and the reliability of the subsequent use of the guard plate. At the same time, the qualified rate of the device for machining the aircraft engine guard plate is improved.

[0022] When the polishing conical sleeve rotates to polish the punch inner wall of the guard plate, the air pump of the cleaning mechanism sucks air into the punch outer die. Then the air continues to be discharged through the L-shaped slot. Part of the air discharged through the gap between the punch of the guard plate and the polishing conical sleeve can not only clean the polishing chips generated during polishing, but also cool the polishing conical sleeve to ensure the continuity and effectiveness of the polishing conical sleeve. Another part of the air is discharged through the L-shaped through hole. Finally, the air enters the filter bag of the cleaning mechanism for collection. The clean air is discharged through the filter bag. The device has the function of cleaning the inside of the device to avoid scratching the surface of the subsequent processed aircraft engine guard plate, improve the reliability and quality of the aircraft engine guard plate in the machining device. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 is a structural schematic view of a machining device for a guard plate of an aircraft engine provided by the present application;

[0024] Figure 2 is a structural schematic view of a machining device for a guard plate of an aircraft engine provided by the present application;

[0025] Figure 3 is a structural schematic view of a machining device for a guard plate of an aircraft engine provided by the present application;

[0026] Figure 4 This is a partial three-dimensional structural diagram of a punching mechanism in a processing device for an aircraft engine guard plate provided by the present invention;

[0027] Figure 5 This is a schematic structural diagram of a cross-section of the outer cover portion of a processing device for an aircraft engine guard plate provided by the present invention;

[0028] Figure 6 This is a schematic diagram of the three-dimensional structure of a filter screen in a processing device for an aircraft engine guard plate provided by the present invention;

[0029] Figure 7 yes Figure 3 Schematic diagram of the partially enlarged structure.

[0030] In the figure: 1 punching lower die, 2 punching through hole, 3 U-shaped bottom plate, 4 punching outer die, 5 punching mechanism, 51 electric hydraulic rod, 52 connecting cover, 53 outer cover, 54 driving motor, 55 fixing rod, 56 primary punching head, 57 polishing tapered sleeve, 58 air vent, 6 U-shaped connecting plate, 7 cleaning mechanism, 71 air pump, 72 filter screen cover, 73 delivery pipe, 74 connecting ring, 75 filter bag, 76 limit clamp, 8 positioning mechanism, 81 limit ring, 82 guide column, 83 fixing block, 9 positioning column, 10 threaded blind hole, 11 touch pressure switch, 12 inner die, 13 L-shaped slot, 14 limit bearing, 15 guide bevel ring, 16 support slot, 17 positioning rod, 18 L-shaped through hole. DETAILED DESCRIPTION

[0031] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0032] like Figure 1-Figure 7As shown, a processing device for a guard plate for an aircraft engine includes a punching lower die 1, a guard plate mold cavity is opened inside the punching lower die 1, and a punching through hole 2 is opened on the cavity wall of the guard plate mold cavity, a U-shaped bottom plate 3 is fixedly connected to the lower surface of the punching lower die 1, a punching outer die 4 is movably connected to the upper surface of the punching lower die 1, an inner die 12 is movably connected to the inner wall of the punching outer die 4, two L-shaped slots 13 are opened on the lower surface of the inner die 12, two symmetrically distributed positioning columns 9 are fixedly connected to the upper surface of the inner die 12, a supporting slot 16 is opened at the bottom end of the through hole of the inner die 12, and the slot wall of the supporting slot 16 is movably contacted with two positioning rods 17, and the side ends of the two positioning rods 17 are fixedly connected to the rod wall of the fixing rod 55, and the hole wall of the punching through hole 2 is provided with two L-shaped through holes 18, and the top of the L-shaped through hole 18 is connected to the top of the punching lower die 1.

[0033] A through hole is formed on the upper surface of the punching outer die 4, and a punching mechanism 5 is fixedly connected to the hole wall of the through hole. The punching mechanism 5 includes an electric hydraulic rod 51 fixedly embedded with the top of the punching outer die 4. The movable end of the electric hydraulic rod 51 is fixedly connected to a connecting cover 52. The side wall of the connecting cover 52 is fixedly connected to an outer cover 53 by bolts. The outer wall of the outer cover 53 is fixedly connected to the inner wall of the through hole of the inner die 12. The inner wall of the outer cover 53 is fixedly connected to a drive motor 54 by bolts. The output end of the drive motor 54 passes through the lower surface of the outer cover 53. The lower surface of the outer cover 53 is provided with a mounting through hole that matches the drive motor 54. The output end of the drive motor 54 is fixedly connected to a fixing rod 55 through a coupling. The bottom end of the fixing rod 55 is fixedly connected to a primary punching head 56. The bottom end of the fixing rod 55 is fixedly sleeved with a polishing conical sleeve 57. The outer walls of the outer cover 53 and the connecting cover 52 are provided with multiple air holes 58. This mechanism enables the device to not only have the function of preliminary punching processing, but also has the function of fine polishing and expanding holes, thereby improving the quality and pass rate of guard plate processing.

[0034] The upper surface of the punching outer mold 4 is fixedly connected to a U-shaped connecting plate 6, and a plurality of threaded blind holes 10 are opened on the upper surface of the U-shaped connecting plate 6. The outer wall of the U-shaped connecting plate 6 is fixedly connected to a cleaning mechanism 7. The cleaning mechanism 7 includes an air pump 71 fixedly connected to the outer wall of the U-shaped connecting plate 6, and a filter screen cover 72 is fixedly connected to the outer wall of the air inlet end of the air pump 71. The lower surface of the filter screen cover 72 is in close contact with the upper surface of the punching outer mold 4. The air outlet end of the air pump 71 is fixedly connected to a delivery pipe 73, and the air outlet end of the delivery pipe 73 passes through the inner wall of the punching outer mold 4. The lower surface of the U-shaped bottom plate 3 is fixedly connected to a connecting ring 74, and the outer wall of the connecting ring 74 is sleeved with a filter bag 75. The top outer wall of the filter bag 75 is clamped with a limiting clamp 76. This mechanism can prevent debris from scattering and polluting the environment, thereby improving the environmental protection performance of the device.

[0035] A connecting groove is provided on the outer wall of the bottom end of the punching outer mold 4, and a touch-pressure switch 11 is fixedly connected to the groove wall of the connecting groove. The button of the touch-pressure switch 11 is located on the side close to the punching lower mold 1, and because the button of the touch-pressure switch 11 is subjected to the main extrusion force and the main body of the touch-pressure switch 11 is subjected to less force, the touch-pressure switch 11 can be used continuously and reliably. The outer walls on both sides of the punching outer mold 4 are fixedly connected with a positioning mechanism 8, and the positioning mechanism 8 includes a limit ring 81 fixedly connected to the outer wall of the punching outer mold 4, and the inner wall of the limit ring 81 is movably connected to a guide column 82, and the bottom end of the guide column 82 is fixedly connected to a fixed block 83, and the side wall of the fixed block 83 is fixedly connected to the outer wall of the U-shaped bottom plate 3. This mechanism can improve the stability of the closing process of the punching outer mold 4 and the punching lower mold 1.

[0036] A guide bevel is provided at the bottom of the polishing conical sleeve 57. The polishing grade of the polishing conical sleeve 57 at the guide bevel is 800 mesh, and the polishing grade of the top of the polishing conical sleeve 57 is 2000 mesh. The hole wall of the punching hole 2 is fixedly connected with a limit bearing 14 and a guide bevel ring 15 that cooperate with the primary punching head 56.

[0037] The electric hydraulic rod 51, the drive motor 54 and the air pump 71 are all electrically connected to the output end of the control box of the punching machine through wires, and the touch pressure switch 11 is electrically connected to the input end of the control box of the punching machine through wires. The above-mentioned electrical equipment and electrical connections are all existing technologies and will not be repeated here.

[0038] The operating principle of the present invention is described as follows: When a guard plate for mounting a sensor in an aircraft engine needs to be punched, the punching device for the aircraft engine guard plate is first installed on a punching machine. At this time, the U-shaped bottom plate 3 is fixed to the punching table of the punching machine, and the U-shaped connecting plate 6 is installed on the punching movable end of the punching machine through bolts and threaded blind holes 10. At the same time, the punching outer die 4 and the punching lower die 1 are in a separated state, and the punching die cavity of the punching lower die 1 is exposed, making it convenient to place the guard plate blank into the punching die cavity of the punching lower die 1;

[0039] Then, the punching machine's control box controls the punching moving end to drive the punching outer die 4 downward, so that the punching outer die 4 moves downward and closes with the punching lower die 1. In the process of the punching outer die 4 moving downward, the guide column 82 and the limit ring 81 are used to limit the position to ensure the punching accuracy. While the punching outer die 4 moves downward, the punching machine's control box also controls the air pump 71 to work. The air inlet end of the air pump 71 draws air and delivers it to the inside of the punching lower die 1 through the delivery pipe 73. When the air pump 71 inhales air, the air flow first passes through the filter cover 72, so that the air is filtered to prevent the air from carrying large impurities. Then, the air in the punching outer die 4 is discharged through the L-shaped slot 13.

[0040] When the punching outer die 4 and the punching lower die 1 are completely closed, the primary punching head 56 on the fixed rod 55 can complete the preliminary punching of the guard plate blank. The preliminary punching avoids the situation where the hole wall material is cracked due to the one-step punching, and further avoids the situation where the inner wall of the punching is roughened and cracked into small gaps. The punching impact force of the primary punching head 56 pushes the guard plate punching waste through the guide bevel ring 15 and the limit bearing 14 into the filter bag 75 of the cleaning mechanism 7. At the same time, the punching reverse force of the fixed rod 55 acts on the inner die 12 through the positioning rod 17 and the supporting slot 16. The inner die 12 transmits the punching reverse force to the punching outer die 4 through the positioning column 9. By unloading the force in time, the fixed rod 55 and the driving end of the drive motor 54 are avoided from being damaged due to excessive punching reverse force.

[0041] In addition, after the punching outer die 4 and the punching lower die 1 are completely closed, the button of the touch-pressure switch 11 is squeezed by the top of the punching lower die 1, and then the internal circuit of the touch-pressure switch 11 is turned on, and an electrical signal is fed back to the input end of the control box of the punching machine. The control box of the punching machine starts the drive motor 54 and the electric hydraulic rod 51 according to the input electrical signal for a period of time (such as 2 minutes). The drive motor 54 drives the fixed rod 55 to rotate through the coupling, and the fixed rod 55 drives the grinding conical sleeve 57 to rotate. After the electric hydraulic rod 51 is started, the moving end of the electric hydraulic rod 51 pushes the connecting cover 52 to move downward, and the connecting cover 52 drives the inner die 12 to move downward through the outer cover 53, and drives the fixed rod 55 and the primary punching head 56 to move downward. The primary punching head 56 is inserted into the limit bearing 14, and the limit bearing 14 is used to constrain the primary punching head 56 to prevent it from swinging, thereby ensuring the stability of the grinding conical sleeve 57 when the fixed rod 55 drives the grinding conical sleeve 57 to rotate and grind. The inner wall of the punching hole of the guard plate is first inserted into the inclined surface, and the inner wall of the punching hole of the guard plate is roughly ground with an 800-mesh grade. As the moving end of the electric hydraulic rod 51 gradually moves downward, the top of the grinding tapered sleeve 57 is inserted into the punching hole of the guard plate. At this time, the inner wall of the punching hole of the guard plate is finely ground with a 2000-mesh grade, and then the inner wall of the punching hole of the guard plate is gradually ground. The grinding process of the grinding tapered sleeve 57 can remove the tiny cracks existing on the inner wall of the punching hole of the guard plate and improve the smoothness of the inner wall of the punching hole of the guard plate, thereby realizing the accurate and defect-free opening of the punching hole of the guard plate. This mechanism enables the device to have the functions of primary punching and fine grinding and expanding holes for the aircraft engine guard plate, and utilizes subsequent grinding to remove the rough hole wall and tiny crack defects generated by the punching process of the guard plate, so that the inner wall of the punching hole of the guard plate is smooth and free of stress concentration, thereby improving the quality of the punching process of the aircraft engine guard plate, and improving the reliability of the subsequent use of the guard plate, while improving the qualified rate of the device for processing the aircraft engine guard plate;

[0042] When the grinding conical sleeve 57 rotates to grind the inner wall of the guard plate punching, the air pump 71 continues to suck air into the punching outer mold 4, and then the air continues to be discharged through the L-shaped slot 13. A part of the air discharged from the L-shaped slot 13 is discharged through the gap between the guard plate punching and the grinding conical sleeve 57. This part of the air discharge can not only clean the grinding chips generated by grinding, but also cool the grinding conical sleeve 57 to ensure the continuity and effectiveness of the grinding conical sleeve 57. The other part of the air is discharged through the L-shaped through hole 18, and finally the air enters the filter bag 75 of the cleaning mechanism 7. The air carrying the grinding chips is intercepted by the filter bag 75, and the air without impurities passes through the filter bag 75 and is discharged. When the processing time is completed (2 minutes), The control box of the punching machine controls the rising of its punching end, and then the punching outer die 4 rises with the punching end of the punching machine, the air pump 71 and the drive motor 54 are suspended, and the moving end of the electric hydraulic rod 51 is controlled to retract to the initial position. When the device finishes its work for the day, the staff removes the limit clamp 76 and removes the filter bag 75 from the connecting ring 74 for cleaning, ensuring that the filter bag 75 can collect the grinding chips discharged by the air again the next day. At the same time, the capacity of the filter bag 75 meets the amount of waste generated by the one-day processing of the device. This mechanism enables the inside of the device to have a cleaning function, avoiding debris left over to scratch the surface of the subsequently processed aircraft engine guard plate, thereby improving the reliability and quality of the aircraft engine guard plate processing in the processing device.

[0043] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A processing device for a guard plate for an aircraft engine, comprising a punching lower die (1), characterized in that: A guard plate mold cavity is provided inside the punching lower mold (1), and a punching through hole (2) is provided on the wall of the guard plate mold cavity. A U-shaped bottom plate (3) is fixedly connected to the lower surface of the punching lower mold (1), and a punching outer mold (4) is movably connected to the upper surface of the punching lower mold (1). A through hole is provided on the upper surface of the punching outer mold (4), and a punching mechanism (5) is fixedly connected to the wall of the through hole. A U-shaped connecting plate (6) is fixedly connected to the upper surface of the punching outer die (4), a plurality of threaded blind holes (10) are formed on the upper surface of the U-shaped connecting plate (6), and a cleaning mechanism (7) is fixedly connected to the outer wall of the U-shaped connecting plate (6); A connecting groove is provided on the outer wall of the bottom end of the punching outer die (4), and a touch-pressure switch (11) is fixedly connected to the groove wall of the connecting groove, and the button of the touch-pressure switch (11) is located on a side close to the punching lower die (1); The outer walls on both sides of the punching outer die (4) are fixedly connected with positioning mechanisms (8); The inner wall of the punching outer die (4) is movably connected to the inner die (12), the lower surface of the inner die (12) is provided with two L-shaped slots (13), and the upper surface of the inner die (12) is fixedly connected to two symmetrically distributed positioning columns (9); The punching mechanism (5) includes an electric hydraulic rod (51) fixedly embedded in the top end of the punching outer die (4), the movable end of the electric hydraulic rod (51) is fixedly connected to a connecting cover (52), the side wall of the connecting cover (52) is fixedly connected to an outer cover (53) by bolts, the outer wall of the outer cover (53) is fixedly connected to the inner wall of the through hole of the inner die (12), the inner wall of the outer cover (53) is fixedly connected to a driving motor (54) by bolts, and the output end of the driving motor (54) is fixedly connected to the inner wall of the through hole of the inner die (12). A mounting through hole is provided on the lower surface of the outer cover (53) and is matched with the drive motor (54). The output end of the drive motor (54) is fixedly connected to a fixing rod (55) via a coupling. The bottom end of the fixing rod (55) is fixedly connected to a primary punching head (56). The bottom end of the fixing rod (55) is fixedly sleeved with a polished conical sleeve (57). The outer walls of the outer cover (53) and the connecting cover (52) are provided with a plurality of air holes (58). The bottom of the polishing conical sleeve (57) is provided with a guide bevel, the polishing grade of the polishing conical sleeve (57) at the guide bevel is 800 mesh, and the polishing grade of the top of the polishing conical sleeve (57) is 2000 mesh.

2. The processing device for an aircraft engine guard plate according to claim 1, characterized in that: A limiting bearing (14) and a material guide bevel ring (15) that match the primary punching head (56) are fixedly connected to the hole wall of the punching through hole (2).

3. The processing device for an aircraft engine guard plate according to claim 1, characterized in that: A supporting slot (16) is provided at the bottom end of the through hole of the inner mold (12), and the slot wall of the supporting slot (16) is movably connected to two positioning rods (17), and the side ends of the two positioning rods (17) are fixedly connected to the rod wall of the fixing rod (55).

4. The processing device for an aircraft engine guard plate according to claim 1, characterized in that: Two L-shaped through holes (18) are provided on the hole wall of the punching through hole (2), and the top ends of the L-shaped through holes (18) are connected to the top of the punching lower die (1).

5. The processing device for an aircraft engine guard plate according to claim 1, characterized in that: The positioning mechanism (8) comprises a limiting ring (81) fixedly connected to the outer wall of the punching outer die (4); the inner wall of the limiting ring (81) is movably connected to a guide column (82); the bottom end of the guide column (82) is fixedly connected to a fixing block (83); and the side wall of the fixing block (83) is fixedly connected to the outer wall of the U-shaped bottom plate (3).

6. The processing device for an aircraft engine guard plate according to claim 1, characterized in that: The cleaning mechanism (7) comprises an air pump (71) fixedly connected to the outer wall of the U-shaped connecting plate (6); a filter screen cover (72) is fixedly connected to the outer wall of the air inlet end of the air pump (71); the lower surface of the filter screen cover (72) is in close contact with the upper surface of the punching outer die (4); the air outlet end of the air pump (71) is fixedly connected to a delivery pipe (73); the air outlet end of the delivery pipe (73) passes through the inner wall of the punching outer die (4); the lower surface of the U-shaped bottom plate (3) is fixedly connected to a connecting ring (74); the outer wall of the connecting ring (74) is sleeved with a filter bag (75); the top outer wall of the filter bag (75) is clamped with a limiting clamp (76).

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