An electron beam processing device suitable for inner surface treatment of rocket engine nozzle

Abstract

The invention discloses an electron beam processing device suitable for the inner surface treatment of a rocket engine nozzle, comprising: an X-Y mobile platform, a liftable rotating table, a beam spot deflection device, a bottom plate, and a support frame; the support frame is fixed on the bottom plate; the X-Y mobile platform is installed on the bottom plate in the support frame; the liftable rotating table is arranged on the X-Y mobile platform; the beam spot deflection device comprises a shielding tube, an electromagnetic coil assembly, and a shielding cabin; the shielding cabin is fixedly installed on the top of the support frame; two groups of electromagnetic coil assemblies are symmetrically arranged on two side walls in the shielding cabin; a mounting hole is provided on the cabin top plate of the shielding cabin, and a shielding tube is passed through the mounting hole; a through hole for passing a nozzle is provided on the cabin bottom plate of the shielding cabin above the liftable rotating table, and the nozzle is fixedly installed on a clamping and fixing unit, and the clamping and fixing unit is arranged on the liftable rotating table. The invention realizes full-automatic, high-precision, green and pollution-free inner curved surface treatment of the nozzle under vacuum environment conditions.

Description

Technical Field

[0001] The invention relates to the technical field of material processing, in particular to an electron beam processing device suitable for processing the inner surface of a rocket engine nozzle. Background Art

[0002] Vacuum electron beam processing is a high-energy beam processing technology commonly used in aerospace and other fields. In recent years, with the development of surface modification technology, vacuum electron beam surface modification technology has become increasingly mature. The invention patent with invention number CN201510571533.X discloses a modification method for the cylindrical surface of a rod based on an electron beam annular gun cladding. The method is to pre-coat the prepared substrate, then sandblast the substrate surface, and then spray the coating slurry on the substrate surface through an air compressor to form a coating. Then, the pre-coated rod is placed on the workbench of the vacuum electron beam processing equipment through the electron beam cladding technology, and then fixed by a triangular chuck and extracted to a vacuum state, and the electron beam cladding modification work is performed to obtain a cladding sample. However, the characteristic of the electron beam processing process is generally that the electron beam spot is vertically shot into the workpiece surface. For some small-caliber inner cavity surfaces and structures with inner surfaces in the shape of spatial curved surfaces, the accessibility of the electron beam spot is limited, and the multi-angle accessibility of the electron beam spot cannot be met under vacuum conditions. The technical requirements, and there is no literature research on the multi-angle accessibility technology of the electron beam spot. Summary of the invention

[0003] The main purpose of the present invention is to provide an electron beam processing device suitable for the inner surface treatment of a rocket engine nozzle, so as to solve the problems that under vacuum conditions, due to the small diameter of the rocket engine nozzle or the curved surface structure of the inner surface of the nozzle, the existing electron beam gun and electron beam spot cannot perform surface treatment on the inner wall of this type of nozzle at multiple angles, and the existing electron beam welding and electron beam surface modification technical conditions are limited.

[0004] The technical solution of the present invention is as follows: an electron beam processing device suitable for the inner surface treatment of a rocket engine nozzle, comprising: an XY movable platform, a liftable rotating table, a beam spot deflection device, a base plate, and a support frame; wherein the support frame is fixed on the base plate; the XY movable platform is installed on the base plate inside the support frame; the liftable rotating table is arranged on the XY movable platform; the beam spot deflection device comprises a shielding tube, an electromagnetic coil assembly, and a shielding cabin; the shielding cabin is fixedly installed on the top of the support frame; two groups of the electromagnetic coil assemblies are symmetrically arranged on the two side walls inside the shielding cabin; a mounting hole is provided in the middle of the cabin top plate of the shielding cabin, and a fixed vertical shielding tube is passed through the mounting hole; a through hole for passing the nozzle is provided in the middle of the cabin bottom plate of the shielding cabin above the liftable rotating table, the lower end of the nozzle is clamped and fixed by a clamping and fixing unit, and the upper end is inserted in the shielding tube, and the clamping and fixing unit is arranged on the liftable rotating table.

[0005] In the above technical solution, the XY moving platform includes an X-direction moving platform, a Y-direction moving platform, a Y-direction slide rail, and a Y-direction slider; two Y-direction sliders are symmetrically arranged on both sides of the Y-direction moving platform, and the two Y-direction sliders are slidingly supported by two Y-direction slide rails symmetrically arranged on the bottom plate; an X-direction slide groove is provided on the top surface of the Y-direction moving platform, and the X-direction moving platform is arranged in the X-direction slide groove and slides along the X-direction guide; the X-direction moving platform and the Y-direction moving platform are positioned and fixed by positioning screws, and the Y-direction slider is driven to move along the Y direction by a driving element fixed on the bottom plate.

[0006] In the above technical solution, the liftable rotating table includes a lifting mechanism and a rotating mechanism. The lifting mechanism is fixed on the X-axis moving platform, and the rotating mechanism is fixed on the top of the lifting mechanism. The rotating mechanism includes a rotating platform, a rotating axis, a circular table, and a clamping and fixing unit. The rotating axis is vertically arranged on the rotating platform and is located directly below the clamping and fixing unit. The upper end of the rotating axis is coaxially fixed with a horizontal circular table. The clamping and fixing unit is fixed on the circular table. The rotating platform can drive the rotating axis to drive the circular table to rotate coaxially and synchronously.

[0007] In the above technical solution, the electromagnetic coil assembly includes a soft magnetic core, an electromagnetic coil, and a baffle. The soft magnetic core is vertically installed on the side panel of the shielding cabin. One end of the soft magnetic core is movably connected to the side panel of the shielding cabin, and the other end is suspended. The electromagnetic coil is spirally wound on the soft magnetic core, and the suspended end of the soft magnetic core is fixed to the vertical baffle.

[0008] In the above technical solution, the support frame includes a horizontal rectangular steel frame and four vertical beams arranged around the bottom of the rectangular steel frame. A horizontal connecting plate is welded and fixed to the lower end of each vertical beam. A screw mounting hole is arranged on each connecting plate. Each connecting plate is threadedly fixed to a corresponding threaded hole on the bottom plate by inserting a screw into the screw mounting hole.

[0009] In the above technical solution, the clamping and fixing unit is a three-claw clamping structure, including a claw and a claw plate. The claw plate is a circular plate with a central through hole arranged along the axial direction. The claw plate is horizontally fixed on the circular table of the liftable rotating table. Three radial grooves are evenly arranged along the circumferential direction on the upper end surface of the claw plate. A claw is arranged in each of the grooves. Each claw can be driven by a driving element second along the guide of the groove to clamp and fix the nozzle close to the outer wall of the nozzle.

[0010] In the above technical solution, vertical slide grooves are arranged on the two side panels of the shielding cabin, and a slider which slides with the slide groove is arranged in each slide groove. The slider can be driven vertically along the slide groove by the driving original three, and the fixed end of the soft magnetic core is connected and fixed to the slider. The driving original three drives the slider up and down to drive the soft magnetic core up and down.

[0011] In the above technical solution, two hand-held handles are symmetrically arranged on the top plate of the shielding cabin.

[0012] In the above technical solution, the driving element is an electric push rod or a hydraulic cylinder.

[0013] Beneficial effects of the present invention:

[0014] The present invention realizes fully automatic, high-precision, green and pollution-free nozzle inner curved surface processing under vacuum environment conditions. It solves the problem of poor electron beam spot accessibility under vacuum environment, can perform full-position surface treatment, overcomes the small inner diameter and structural irregularities of rocket engine nozzles, which affect its surface modification and processing, and can obtain a pure and good surface modification layer and processing quality. At the same time, the invention is also suitable for other inner surface processing of inner tubes due to structural irregularities and small diameters. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention, so that other features, purposes and advantages of the present invention become more obvious. The accompanying drawings of the exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0016] Figure 1 2 is a schematic diagram of the overall structure of an electron beam processing device suitable for processing the inner surface of a rocket engine nozzle according to an embodiment of the present invention;

[0017] Figure 2 It is a schematic cross-sectional view of the XY moving platform structure of an electron beam processing device suitable for processing the inner surface of a rocket engine nozzle according to an embodiment of the present invention;

[0018] Figure 3 It is a schematic diagram of the three-dimensional structure of a clamping and fixing unit of an electron beam processing device suitable for processing the inner surface of a rocket engine nozzle according to an embodiment of the present invention;

[0019] 1-XY moving platform; 11-X moving platform; 12-Y moving platform; 13-Y slide rail; 14-Y slide block; 121-X slide slot;

[0020] 2-liftable rotating table; 21-lifting mechanism; 22-rotating mechanism; 221-rotating platform; 222-rotating axis; 223-round table;

[0021] 3- beam spot deflection device;

[0022] 4-shielding tube;

[0023] 5-cabin top plate;

[0024] 6- Side panel;

[0025] 7-electromagnetic coil assembly; 71-soft magnetic core; 73-baffle;

[0026] 8-clamping and fixing unit; 81-claw; 82-claw plate;

[0027] 9-Bottom plate;

[0028] 10- Shielding cabin;

[0029] 100-base plate;

[0030] 200-support frame; 201-rectangular steel frame; 202-vertical beam; 203-connecting plate. DETAILED DESCRIPTION

[0031] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. 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 creative work should fall within the scope of protection of the present invention.

[0032] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so as to describe the embodiments of the present invention described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0033] In the present invention, the directions or positional relationships indicated by the terms "upper", "lower", "inner", "middle", "outer", "front", "back" and the like are based on the directions or positional relationships shown in the drawings. These terms are mainly used to better describe the present invention and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific direction, or to be constructed and operated in a specific direction.

[0034] In addition, some of the above terms may be used to express other meanings in addition to indicating orientation or positional relationship. For example, the term "on" may also be used to express a certain dependency or connection relationship in some cases. For those skilled in the art, the specific meanings of these terms in the present invention can be understood according to specific circumstances.

[0035] In addition, the terms "disposed" and "connected" should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements or components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0036] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments. Example 1

[0037] Please see attached Figure 1-3, an electron beam processing device suitable for rocket engine nozzle inner surface treatment according to an embodiment of the present invention comprises: an XY moving platform 1, a liftable rotating platform 2, a beam spot deflection device 3, a base plate 100, and a support frame 200; wherein the support frame 200 is fixed on the base plate 100; the XY moving platform 1 is installed on the base plate 100 in the support frame 200; the liftable rotating platform 2 is arranged on the XY moving platform 1; the beam spot deflection device 3 comprises a shielding tube 4, an electromagnetic coil assembly 7, and a shielding cabin 10; the shielding cabin 10 is fixedly installed on the top of the support frame 200; two groups of the electromagnetic coil assemblies 7 are symmetrically arranged on the two side walls in the shielding cabin 10;

[0038] A mounting hole is provided in the middle of the cabin top plate 5 of the shielding cabin body 10, and a fixed vertical shielding pipe 4 is passed through the mounting hole;

[0039] A through hole for passing the nozzle is opened in the middle of the bottom plate 9 of the shielding cabin 10 above the liftable rotating platform 2. The lower end of the nozzle is clamped and fixed by a clamping and fixing unit 8, and the upper end is inserted into the shielding pipe 4. The clamping and fixing unit 8 is arranged on the liftable rotating platform 2.

[0040] In the above embodiment, the lower end of the nozzle is clamped and fixed on the XY movable platform 1 by the clamping and fixing unit 8. The XY movable platform 1 can realize the XY movement of the nozzle, and the lifting and rotating table 2 can realize the lifting and rotating movement of the nozzle. The two sets of electromagnetic coil assemblies 7 can move up and down, realizing the multi-degree-of-freedom movement of the nozzle, and realizing fully automatic, high-precision, green and pollution-free nozzle inner surface processing.

[0041] In the above embodiments, please refer to the attached Figure 1 , 2 The XY moving platform 1 includes an X-direction moving platform 11, a Y-direction moving platform 12, a Y-direction slide rail 13, and a Y-direction slider 14; two Y-direction sliders 14 are symmetrically arranged on both sides of the Y-direction moving platform 12, and the two Y-direction sliders 14 are slidably supported by two Y-direction slide rails 13 symmetrically arranged on the bottom plate 100; an X-direction slide groove 121 is provided on the top surface of the Y-direction moving platform 12; the X-direction moving platform 11 is arranged in the X-direction slide groove 121 and slides along the X-direction guide; the X-direction moving platform 11 and the Y-direction moving platform 12 are positioned and fixed by positioning screws; the Y-direction slider 14 is driven to move along the Y direction by a driving element 1 fixed on the bottom plate 100; the driving element 1 is an electric push rod, which is vertically fixed on the side wall of the shielding cabin 10; the telescopic end is connected and fixed to the slider 14; the electric push rod can drive the slider 14 to move up and down in the slide groove 121.

[0042] In the above embodiments, please refer to the attached Figure 1The liftable rotating table 2 includes a lifting mechanism 21 and a rotating mechanism 22. The lifting mechanism 21 is fixed on the X-direction moving platform 11. The rotating mechanism 22 is fixed on the top of the lifting mechanism 21. The rotating mechanism 22 includes a rotating platform 221, a rotating shaft 222, a round table 223, and a clamping and fixing unit 8. The rotating shaft 222 is vertically arranged on the rotating platform 221 and is located directly below the clamping and fixing unit 8. The upper end of the rotating shaft 222 is coaxially fixed with a horizontal round table 223. The clamping and fixing unit 8 is fixed on the round table 223. The rotating platform 221 can drive the rotating shaft 222 to drive the round table 223 to rotate coaxially and synchronously.

[0043] In the above embodiments, please refer to the attached Figure 1 The electromagnetic coil assembly 7 includes a soft magnetic core 71, an electromagnetic coil, and a baffle 73. The soft magnetic core 71 is vertically installed on the side panel of the shielding cabin 10. One end of the soft magnetic core 71 is movably connected to the side panel of the shielding cabin 10, and the other end is suspended. The electromagnetic coil is spirally wound on the soft magnetic core 71, and the suspended end of the soft magnetic core 71 is fixed to the vertical baffle 73.

[0044] In the above embodiments, please refer to the attached Figure 1 The support frame 200 includes a horizontal rectangular steel frame 201 and four vertical beams 202 arranged around the bottom of the rectangular steel frame 201. A horizontal connecting plate 203 is welded and fixed to the lower end of each vertical beam 202. A screw mounting hole is set on each connecting plate 203. Each connecting plate 203 is threadedly connected and fixed to the corresponding threaded hole on the base plate 100 by inserting a screw into the screw mounting hole.

[0045] In the above embodiments, please refer to the attached Figure 1 , 3 The clamping and fixing unit 8 is a three-claw clamping structure, including a claw 81 and a claw plate 82. The claw plate 82 is a circular plate with a central through hole arranged along the axial direction. The claw plate 82 is horizontally fixed on the truncated table 223 of the liftable rotating table 2. Three radial sliding grooves are evenly arranged along the circumferential direction on the upper end surface of the claw plate 82. A claw 81 is arranged in each of the sliding grooves. Each claw 81 can be driven by a second driving element to slide along the guide of the sliding groove close to the outer wall of the nozzle to clamp and fix the nozzle. The second driving element is an electric push rod, which is fixed on the truncated table 223 of the liftable rotating table 2. The telescopic end is fixedly connected to the claw 81. The three claws 81 can realize the action of simultaneously driving the nozzle to be clamped or released through three electric push rods.

[0046] In the above embodiments, please refer to the attached Figure 1Vertical slide grooves are arranged on the two side panels of the shielding cabin 10, and a slider which slides with the slide groove is arranged in each slide groove. The slider can be driven vertically along the slide groove by the driving original three, and the fixed end of the soft magnetic core 71 is connected and fixed to the slider. The driving original three drives the slider up and down to drive the soft magnetic core 71 to move up and down.

[0047] In the above embodiments, please refer to the attached Figure 1 Two hand-held handles are symmetrically arranged on the top plate of the shielding cabin 10 to facilitate the transportation of the entire device.

[0048] In the above embodiments, preferably, the driving element is an electric push rod or a hydraulic cylinder, which can achieve a stable driving force.

[0049] In order to more clearly describe the embodiments of the present invention, the present invention will use the following methods or steps to process the rocket engine nozzle structure:

[0050] (1) According to the nozzle structure of the rocket engine to be processed, the nozzle trajectory and the deflection angle and direction of the electron beam spot are designed. The internal structure of the nozzle is a curved surface, so the workpiece movement trajectory adopts a spiral rise, and the electron beam spot is required to be vertically injected into the inner curved surface of the nozzle, so as to achieve the overall treatment of the inner surface of the nozzle.

[0051] (2) The structure of the liftable rotating platform 2 is designed according to the running trajectory of the nozzle, and the movement step length and accuracy are calculated. The rotation mechanism and the lifting mechanism are designed to transport the nozzle along the Z direction and make a spiral motion. The relative position between the inner wall of the nozzle and the axis of the electron beam is adjusted by controlling the liftable rotating platform 2 to move along the X and Y directions through the XY moving mechanism 1. The step length is designed along the Z direction, specifically controlled between 70-80%, and the accuracy requirement is controlled below 5%. The clamping and fixing unit 8 is designed as a three-claw clamping end that can fit the outer surface of the nozzle. There is a circular platform in the middle of the three claws to support the nozzle and play a supporting and fixing role. In addition to fixing the nozzle, the main function of this clamping design is to prevent the nozzle from deforming during the clamping and fixing process or when the electron beam spot is on the processing surface due to wall thickness. The rotation mechanism and the lifting mechanism are mainly designed to realize the spiral rising motion of the nozzle and accurately position and control the relative position of the nozzle through the servo motor. According to the design requirements, the movement step length is designed to be 50-90% of the beam spot diameter, and the accuracy requirement is controlled within 8% of the step length. The step length mainly affects the overlap ratio of the beam spot action area during the beam spot movement.

[0052] (3) According to the nozzle structure design, the electromagnetic coil assembly 7 in the electron beam spot deflection device 3 needs to adjust the coil spacing and the up and down position according to the outer diameter of the nozzle. Therefore, when designing the deflection device, the movement of the electromagnetic coil is realized at the same time. The distance between the two sets of coils is 80 mm, and the horizontal position is centered. The XY moving platform design is mainly used to adjust the horizontal spacing between the inner wall of the nozzle and the axis of the electron beam to ensure the energy consistency of the beam spot on the inner curved surface of the nozzle.

[0053] (4) Design the process adaptability of the electromagnetic coil assembly in the beam spot deflection device 3 according to the nozzle structure. The main function of the beam spot deflection device 3 is to realize the beam spot deflection of the electron beam spot that can adjust the incident angle according to the curvature change of the inner surface of the nozzle, to ensure that the electron beam spot can be vertically injected into the inner curved surface of the nozzle after deflection or deflected at multiple angles according to processing requirements. The beam spot deflection device 3 is composed of an electromagnetic coil assembly 7 and an adjustment mechanism. The adjustment mechanism is mainly composed of a side panel 6, a cabin top plate 5 and a cabin bottom plate 9, which can realize the adjustment of the electromagnetic coil spacing and the upper and lower positions. The purpose of this design is to meet the installation and processing requirements of nozzles of different specifications. The electromagnetic coil spacing adjustment range is 50-100mm, and the upper and lower position adjustment range is ±50mm. The number of coil turns and the shape of the soft magnetic core in the electron beam spot deflection device 3 are designed. By calculating and designing the number of coil turns and the shape of the soft magnetic core in the electromagnetic coil, it is ensured that the electron beam spot can be deflected to the magnetic field strength that can be processed on the inner surface of the nozzle, and the beam spot incident angle is determined. The soft magnetic core is a rectangular parallelepiped, 90mm long, 40mm wide, 45mm high, and each corner is chamfered at an angle of 45°. The core design shape is to ensure that the nozzle surface to be treated is completely in a uniform magnetic field. The coil uses a wire diameter of 0.6mm and has 1500 winding turns.

[0054] (5) The number of coil turns and the shape of the soft magnetic core in the electron beam spot deflection device 3 are designed. By calculating and designing the number of coil turns and the shape of the soft magnetic core in the electromagnetic coil, it is ensured that the electron beam spot can be deflected to the magnetic field strength that can be treated on the inner surface of the nozzle, and the deflection angle and incident direction of the electron beam can be accurately controlled. The soft magnetic core is in the shape of a rectangular parallelepiped, 80-150mm long, 40-50mm wide, 40-50mm high, and each corner is chamfered at an angle of 40-60°. The design shape of the soft magnetic core is to ensure that the surface to be treated of the nozzle is completely in a uniform magnetic field. The coil uses a wire diameter of 0.5-1mm and a winding number of 1000-2000.

[0055] (6) The shielding tube 4 is designed according to the nozzle size and magnetic field strength. The wall thickness of the shielding tube 4 is controlled to be 1-3 mm, preferably 1 mm, and the precise inner diameter is designed to be 20-50 mm, preferably 30 mm. Under vacuum conditions, the electron beam spot is first injected into the shielding tube 4, and then ejected from the tube mouth of the shielding tube 4 in the electron beam spot deflection device 1, deflected in the uniform magnetic field, and injected into the inner surface of the nozzle to achieve vertical bombardment of the inner surface by the beam spot. The function of the shielding tube 4 is to shield the magnetic field interference in the non-working area and ensure that the electron beam spot is deflected when it reaches the nozzle surface to be processed.

[0056] (7) After the above device structure is installed, its motion system is integrated and controlled, and the automatic processing of the inner surface of the nozzle is realized through program writing.

[0057] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An electron beam processing device suitable for the inner surface treatment of a rocket engine nozzle, characterized in that: include: An XY moving platform (1), a liftable rotating platform (2), a beam spot deflection device (3), a base plate (100), and a supporting frame (200); wherein: The support frame (200) is fixed on the base plate (100); The XY moving platform (1) is mounted on a base plate (100) within a supporting frame (200); The liftable rotating platform (2) is arranged on the XY moving platform (1); The beam spot deflection device (3) comprises a shielding tube (4), an electromagnetic coil assembly (7), and a shielding cabin (10); The shielding cabin (10) is fixedly mounted on the top of the supporting frame (200); The two groups of electromagnetic coil assemblies (7) are symmetrically arranged on two side walls inside the shielding cabin (10); A mounting hole is provided in the middle of the cabin top plate (5) of the shielding cabin body (10), and a shielding pipe (4) is inserted into the mounting hole and fixedly placed vertically; A through hole for passing the nozzle is provided in the middle of the bottom plate (9) of the shielding cabin (10) above the liftable rotating platform (2); the lower end of the nozzle is clamped and fixed by a clamping and fixing unit (8), and the upper end is inserted into the shielding pipe (4); the clamping and fixing unit (8) is arranged on the liftable rotating platform (2); The electromagnetic coil assembly (7) comprises a soft magnetic core (71), an electromagnetic coil, and a baffle (73); the soft magnetic core (71) is vertically mounted on a side plate of a shielding cabin (10); one end of the soft magnetic core (71) is movably connected to the side plate of the shielding cabin (10), and the other end is suspended; the electromagnetic coil is spirally wound around the soft magnetic core (71); and the suspended end of the soft magnetic core (71) is fixed to a vertical baffle (73); Vertical slide grooves are arranged on the two side plates of the shielding cabin (10), and a slider that slides with the slide groove is arranged in each slide groove. The slider can be driven by the driving element three to move vertically along the slide groove. The fixed end of the soft magnetic core (71) is connected and fixed to the slider. The driving element three drives the slider to move up and down, which can drive the soft magnetic core (71) to move up and down. The driving element is an electric push rod or a hydraulic cylinder.

2. The electron beam processing device suitable for the inner surface treatment of a rocket engine nozzle according to claim 1, characterized in that: The XY moving platform (1) comprises an X-direction moving platform (11), a Y-direction moving platform (12), a Y-direction slide rail (13), and a Y-direction slider (14); two Y-direction sliders (14) are symmetrically arranged on both sides of the Y-direction moving platform (12); the two Y-direction sliders (14) are slidably supported by two Y-direction slide rails (13) symmetrically arranged on the bottom plate (100); an X-direction slide groove (121) is provided on the top surface of the Y-direction moving platform (12); the X-direction moving platform (11) is arranged in the X-direction slide groove (121) and slides along the X-direction guide; the X-direction moving platform (11) and the Y-direction moving platform (12) are positioned and fixed by positioning screws; the Y-direction slider (14) is driven to move along the Y-direction by a driving element fixed on the bottom plate (100).

3. The electron beam processing device suitable for the inner surface treatment of a rocket engine nozzle according to claim 1, characterized in that: The liftable rotating platform (2) comprises a lifting mechanism (21) and a rotating mechanism (22); the lifting mechanism (21) is fixed on the X-direction movable platform (11); the rotating mechanism (22) is fixed on the top of the lifting mechanism (21); the rotating mechanism (22) comprises a rotating platform (221), a rotating shaft (222), a round table (223), and a clamping and fixing unit (8); the rotating shaft (222) is vertically arranged on the rotating platform (221) and is located directly below the clamping and fixing unit (8); the upper end of the rotating shaft (222) is coaxially fixed with a horizontal round table (223); the clamping and fixing unit (8) is fixed on the round table (223); the rotating platform (221) can drive the rotating shaft (222) to drive the round table (223) to rotate coaxially and synchronously.

4. The electron beam processing device suitable for the inner surface treatment of a rocket engine nozzle according to claim 1, characterized in that: The support frame (200) comprises a horizontal rectangular steel frame (201) and four vertical beams (202) arranged around the bottom of the rectangular steel frame (201), a horizontal connecting plate (203) is welded and fixed at the lower end of each vertical beam (202), each connecting plate (203) is provided with a screw mounting hole, and each connecting plate (203) is threadedly connected and fixed to a corresponding threaded hole on the bottom plate (100) by inserting a screw into the screw mounting hole.

5. The electron beam processing device suitable for the inner surface treatment of a rocket engine nozzle according to claim 1, characterized in that: The clamping and fixing unit (8) is a three-claw clamping structure, comprising a clamping claw (81) and a clamping claw plate (82). The clamping claw plate (82) is a circular plate with a central through hole arranged along the axial direction. The clamping claw plate (82) is horizontally fixed on the circular table (223) of the liftable rotating table (2). The upper end surface of the clamping claw plate (82) is evenly arranged with three radial sliding grooves along the circumferential direction. A clamping claw (81) is arranged in each of the sliding grooves. Each clamping claw (81) can be driven by a second driving element along the sliding groove to guide and drive close to the outer wall of the nozzle to clamp and fix the nozzle.

6. The electron beam processing device suitable for the inner surface treatment of a rocket engine nozzle according to claim 1, characterized in that: Two hand-held handles are symmetrically arranged on the top plate of the shielding cabin (10).

7. The electron beam processing device suitable for the inner surface treatment of a rocket engine nozzle according to claim 1, characterized in that: The motion trajectory of each driven unit is realized through software programming control.

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