Process for processing high frequency electromagnetic cathode assembly for satellite communication

Abstract

The processing technology of the satellite communication high-frequency electromagnetic cathode assembly comprises the following steps: Step 1, preparing a rare earth cathode wire, a transition connection tantalum body, an insulating seat and two connecting electrode rods, wherein the transition connection tantalum body is provided with a first groove, and the connecting electrode rods are each provided with a second groove; Step 2, welding the connecting electrode rods, the transition connection tantalum body and the rare earth cathode wire together, wherein the transition connection tantalum body is welded in the second groove, the connecting feet of the rare earth cathode wire are welded and matched in the first groove, and then the two connecting electrode rods are inserted and matched on the insulating seat. The present application can effectively avoid the phenomenon of loose rare earth cathode wire falling off, ensure the quality and stability of satellite signals, and can be used in satellites adopting multiple groups of vacuum electronic devices to emit electromagnetic fields, so that even if any group of vacuum electronic devices fails, the risk of satellite disconnection and loss of control with the ground can be avoided, and the satellite communication signal can work smoothly, continuously and reliably.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of cathode assembly, in particular to a satellite communication high-frequency electromagnetic cathode assembly processing technology. BACKGROUND

[0002] Vacuum electronic devices include klystron, traveling wave tube, backward wave tube, etc., which adopt a hot cathode to emit an electron beam, and the electron beam is subjected to velocity modulation in a resonant cavity or a slow wave structure. In the transmission process of the velocity-modulated electron beam, the electrons with high speed catch up with the electrons with low speed to form a group electron beam, and the group electron beam gives energy to electromagnetic waves, thereby forming amplified or oscillated electromagnetic wave output. The vacuum electronic device has the advantages of high output power, high working frequency, radiation resistance and long service life, and thus has extremely wide application in satellite communication.

[0003] After decades of development, although the theory of conventional vacuum electronic devices and related technologies has been basically mature, modern high-tech microwave devices continue to have new development needs for the power, frequency, bandwidth and other working characteristics of microwave signals. These needs mainly reflect the requirements of higher frequency, greater power, wider bandwidth, higher efficiency and new working characteristics, thereby posing new challenges and development opportunities for the development of microwave vacuum electronic devices and related technologies. After being launched into space, the satellite is in a high-speed moving state, so if only one set of vacuum electronic devices is arranged on the satellite to generate an electromagnetic field for communication, when this set of vacuum electronic devices is damaged, the electromagnetic field will disappear, resulting in a lost state of the satellite. Therefore, in order to avoid the lost state of the satellite, the existing satellite usually has multiple sets of vacuum electronic devices, so that the satellite can generate multiple electromagnetic fields for communication. In this arrangement, even if any one or several sets of vacuum electronic devices are damaged, the normal vacuum electronic devices on the satellite can still emit electromagnetic fields for communication to prevent the satellite from being lost. However, this method still has certain limitations and can only treat the symptoms but not the root cause. The most direct, simple and effective method is to improve the performance and service life of the vacuum electronic device to ensure the communication performance and service life of the satellite. The cathode, which is responsible for electron emission, is the most core part of the vacuum electronic device, and its performance will directly affect the output performance and service life of the microwave source, and further affect the performance and service life of the satellite and high-power microwave device.

[0004] As Figure 5As shown, the existing hot cathode usually comprises an insulating seat I1', two electrodes I2' mounted on the insulating seat I1', a first cathode filament 4' welded on the two electrodes I2' by brazing filler metal 3', in the prior art, the electrodes I2' usually have no structure for connecting the brazing filler metal 3', the brazing filler metal 3' is usually directly melted and attached on the surface of the electrodes I2', and the adhesion between the brazing filler metal 3' and the electrodes I2' is not good; and since the brazing filler metal 3' and the welding piece are heated to the melting temperature of the brazing filler metal 3' at the same time after the brazing filler metal 3' with a lower melting point than the welding piece is heated, the welding method of filling the gap of the solid workpiece with the liquid brazing filler metal 3' to connect the metals, the melting point of the brazing filler metal 3' is usually much lower than the melting points of the electrodes I2' and the first cathode filament 4', the brazing filler metal 3', the electrodes I2' and the first cathode filament 4' cannot be welded, and the connection stability is insufficient, and when the hot cathode is powered to emit high temperature, the first cathode filament 4' is prone to falling off, thereby affecting the communication signal of the satellite, causing weak or no signal, and high risk of losing control of the ground control center. SUMMARY

[0005] In order to overcome the shortcomings of the prior art, the satellite communication high-frequency electromagnetic cathode assembly processing technology is provided.

[0006] The technical scheme adopted by the present application to solve its technical problems is:

[0007] The satellite communication high-frequency electromagnetic cathode assembly processing technology comprises the following steps:

[0008] Step 1, preparing a rare earth cathode filament, a transition connection tantalum body, an insulating seat and two connecting electrode rods, wherein the rare earth cathode filament comprises a rare earth cathode filament body and two connecting feet respectively arranged on both ends of the rare earth cathode filament body; the two connecting electrode rods each comprise a molybdenum rod and a sheet-shaped molybdenum block integrally formed, and a second groove is arranged on each connecting electrode rod and located on the sheet-shaped molybdenum block;

[0009] Step 2, welding and combining the connecting electrode rods, the transition connection tantalum body and the rare earth cathode filament together, wherein the connecting feet, the transition connection tantalum body and the sheet-shaped molybdenum block are stacked in sequence, the connecting feet are pressed by using a resistance welding device, the connecting feet push the transition connection tantalum body to bend and deform and embed into the second groove of the connecting electrode rod, at the same time, the transition connection tantalum body also forms a first groove matched with the connecting feet by bending and deforming, and then the transition connection tantalum body is welded in the second groove and the connecting feet of the rare earth cathode filament are welded in the first groove; then the two connecting electrode rods are inserted and matched on the insulating seat.

[0010] In the present application, the rare earth cathode filament body is spiral-shaped, and the two connecting feet are integrally formed on both ends of the rare earth cathode filament body.

[0011] In the present application, the cathode filament manufacturing process of the rare earth cathode filament in step 1 comprises the following steps:

[0012] Step 1-11, winding of the rare earth cathode filament, the tungsten wire is wound into a spiral-shaped rare earth cathode filament body by a wire winding machine, and connecting feet are left at both ends of the rare earth cathode filament body, wherein the tungsten wire is made of 98% tungsten and 2% rare earth elements;

[0013] Step 1-12, shaping of the rare earth cathode filament, the rare earth cathode filaments are shaped by manual work to have the same size specification;

[0014] Step 1-13, cleaning of the rare earth cathode filament, the rare earth cathode filament is cleaned to remove oil stains on the surface of the rare earth cathode filament;

[0015] Step 1-14, shaping of the rare earth cathode filament, the rare earth cathode filament is hardened by electric shaping.

[0016] In the present application, the cleaning of the rare earth cathode filament in step 1-13 specifically comprises the following steps:

[0017] Step 1-131, the rare earth cathode filament is put into an electrolyte containing 10% potassium hydroxide, and first electrolysis is performed by using a frequency-adjustable direct current power supply to remove oil stains attached during winding of the rare earth cathode filament, and the leveling effect of the high-frequency direct current power supply is used to remove the coarse and high texture generated during manufacturing of the rare earth cathode filament;

[0018] Step 1-132, the potassium hydroxide solution on the surface of the rare earth cathode filament is washed away by water;

[0019] Step 1-133, the pH value of the neutralizing liquid is controlled to be 5-7, and the neutralizing liquid makes the surface of the rare earth cathode filament neutral;

[0020] Step 1-134, the rare earth cathode filament is washed by water by using tap water combined with an ultrasonic cleaning device;

[0021] Step 1-135, the rare earth cathode filament is washed by water by using pure water combined with an ultrasonic cleaning device;

[0022] Step 1-136, the moisture on the surface of the rare earth cathode filament is dried;

[0023] Step 1-137, the dried rare earth cathode filament is regularly placed in a first container for workers to take and shape.

[0024] In the present application, the shaping of the rare earth cathode filament in step 1-14 specifically comprises the following steps:

[0025] Step 1-141, direct current of 0-12V adjustable linear power supply is connected to the rare earth cathode filament;

[0026] Step 1-142, the adjustable linear power supply is used to output parabolic gradually rising current to the rare earth cathode filament, and then output parabolic gradually falling current, so that the rare earth cathode filament forms metal memory, and the shaping of the rare earth cathode filament is completed.

[0027] In the present application, the surface treatment processing procedure of the connecting electrode rod is included in step 1, and the surface treatment processing procedure of the connecting electrode rod includes the following steps:

[0028] Step 1-21, the connecting electrode rod is put into an electrolyte containing 5% potassium hydroxide, and a frequency-adjustable direct current power supply is used for primary electrolysis;

[0029] Step 1-22, the potassium hydroxide solution on the surface of the connecting electrode rod is washed away;

[0030] Step 1-23, the surface of the connecting electrode rod is slightly etched by using chromium sulfate acid;

[0031] Step 1-24, a second groove is processed on the connecting electrode rod by using an electric spark processing process, and the second groove is located on the sheet-shaped molybdenum block;

[0032] Step 1-25, the connecting electrode rod is washed by tap water combined with an ultrasonic cleaning device;

[0033] Step 1-26, the connecting electrode rod is washed by pure water combined with an ultrasonic cleaning device;

[0034] Step 1-27, the moisture on the surface of the connecting electrode rod is dried;

[0035] Step 1-28, the dried connecting electrode rod is regularly placed in the second container.

[0036] In the present application, the transition connecting tantalum body is a sheet-shaped structure made of pure tantalum.

[0037] In the present application, step 2 specifically includes the following steps:

[0038] Step 2-1, the connecting foot, the transition connecting tantalum body and the sheet-shaped molybdenum block of the connecting electrode rod are arranged and stacked in sequence, and then the connecting foot is pressed by using a resistance welding device, the connecting foot pushes the transition connecting tantalum body to bend and deform and embed into the second groove of the connecting electrode rod, and at the same time, the transition connecting tantalum body also forms a first groove matched with the connecting foot through bending and deforming;

[0039] Step 2-2, after step 2-1 is performed, the resistance welding device is powered on, so that the connecting foot, the transition connecting tantalum body and the connecting electrode rod are welded together;

[0040] Step 2-3, the connecting foot and the connecting electrode rod are welded by using a laser welding device;

[0041] Step 2-4, two connecting electrode rods are inserted and fixed on the insulating seat, and the assembly of the whole cathode assembly is completed;

[0042] Step 2-5, first, the rare earth cathode filament is inserted into the shaping support, and then the cathode assembly is powered and shaped and hardened, so that the shaping and hardening treatment of the combined installation of the rare earth cathode filament, the transition connecting tantalum body and the two connecting electrode rods is realized, and the finished product of the cathode assembly is obtained.

[0043] In the present application, step 2-5 includes the following steps:

[0044] Step 2-51, connecting the rare earth cathode filament to the direct current of the adjustable linear power supply;

[0045] Step 2-52, using the adjustable linear power supply to output gradually increasing parabolic current to the rare earth cathode filament, and then outputting gradually decreasing parabolic current, so that the rare earth cathode filament re-forms metal memory, and the final shaping of the rare earth cathode filament is completed.

[0046] The beneficial effects of the present application are:

[0047] 1. The first groove and the second groove are arranged on the transition connecting tantalum body and the connecting electrode rod respectively, which can weld the transition connecting tantalum body in the second groove and the connecting foot of the rare earth cathode filament in the first groove during the processing of the cathode assembly, so that the structure with increased connection adhesion between the transition connecting tantalum body, the connecting electrode rod and the rare earth cathode filament is formed, the quality of the combined welding between the transition connecting tantalum body, the connecting electrode rod and the rare earth cathode filament is effectively improved, the phenomenon of loose and falling of the rare earth cathode filament is avoided, and the quality and stability of the satellite signal are ensured;

[0048] 2. In the present application, the transition connecting tantalum body is made of pure tantalum, the rare earth cathode filament is made of tungsten wire, and the connecting electrode rod is made of molybdenum, so that the melting point of the transition connecting tantalum body, the rare earth cathode filament and the connecting electrode rod is high, the working stability of the cathode assembly is high, and the cathode assembly can be used at a higher working temperature;

[0049] 3. The resistance welding and laser welding are used to process the cathode assembly at the same time, which can firmly fix the transition connecting tantalum body, the connecting electrode rod and the rare earth cathode filament together, the welding quality of the three is high, the quality and stability of the cathode assembly are further improved, and the signal stability when applied in satellite communication is ensured;

[0050] 4. The cathode assembly provided by the present application can be used in a satellite that uses multiple groups of vacuum electron devices to emit electromagnetic fields, and even if any one group of vacuum electron devices fails, it will not cause the risk of satellite disconnection and loss of control from the ground, and the process is better than the same foreign process, which ensures the smooth and reliable work of the satellite communication signal. BRIEF DESCRIPTION OF DRAWINGS

[0051] The application will be further described below in connection with the drawings and embodiments:

[0052] Figure 1 is a front view of the cathode assembly in Example 1;

[0053] Figure 2 is a left view of the cathode assembly in Example 1;

[0054] Figure 3 is a partial enlarged view in the top direction of the cathode assembly in Example 1;

[0055] Figure 4 is a front view of the cathode assembly in Example 2;

[0056] Figure 5 is a front view of the existing cathode assembly. DETAILED DESCRIPTION

[0057] In order to make the purpose, technical solutions and advantages of the embodiments of the application clearer, the technical solutions in the embodiments of the application will be described clearly and completely below with reference to the drawings in the embodiments of the application. Example 1:

[0058] Referring to Figures 1-3 , the processing technology of the high-frequency electromagnetic cathode assembly for satellite communication includes the following steps:

[0059] Step 1, prepare the rare earth cathode wire 1, the transition connection tantalum body 2, the insulating seat 3 and two connecting electrode rods 4, wherein the transition connection tantalum body 2 is provided with a first groove, the rare earth cathode wire 1 includes a rare earth cathode wire body 11 and two connecting feet 12 respectively provided on both ends of the rare earth cathode wire body 11, and the two connecting electrode rods 4 are inserted and fixed on the insulating seat 3, and the connecting electrode rods 4 are each provided with a second groove;

[0060] Step 2, weld the connecting electrode rods 4, the transition connection tantalum body 2 and the rare earth cathode wire 1 together, wherein the transition connection tantalum body 2 is welded in the second groove, the connecting feet 12 of the rare earth cathode wire 1 are welded and matched in the first groove, and then the two connecting electrode rods 4 are inserted and matched on the insulating seat 3.

[0061] Further, in the embodiment, the rare earth cathode wire body 11 is spiral-shaped, and the two connecting feet 12 are respectively integrally formed on both ends of the rare earth cathode wire body 11. In the embodiment, the cathode wire manufacturing process of the rare earth cathode wire 1 includes the following steps in Step 1:

[0062] Step 1-11, winding of the rare earth cathode filament 1, using a winding machine to wind the tungsten wire into a spiral-shaped rare earth cathode filament body 11, and leaving a connecting foot 12 at both ends of the rare earth cathode filament body 11, wherein the tungsten wire is made of 98% tungsten and 2% rare earth elements;

[0063] Step 1-12, shaping of the rare earth cathode filament 1, using manual shaping of the rare earth cathode filament 1 to have substantially the same size specifications between the plurality of rare earth cathode filaments 1;

[0064] Step 1-13, cleaning of the rare earth cathode filament 1, cleaning the rare earth cathode filament 1 to remove oil stains on the surface of the rare earth cathode filament 1;

[0065] Step 1-14, setting of the rare earth cathode filament 1, setting and hardening the rare earth cathode filament 1 by passing electricity.

[0066] Further, in the present embodiment, the cleaning of the rare earth cathode filament 1 of step 1-13 specifically includes the following steps:

[0067] Step 1-131, placing the rare earth cathode filament 1 into an electrolyte containing 10% potassium hydroxide, using a frequency-adjustable direct current power supply for primary electrolysis to remove oil stains attached during winding of the rare earth cathode filament 1, and using the flattening effect of the high-frequency direct current power supply to remove the coarse and high texture generated during the manufacture of the rare earth cathode filament 1;

[0068] Step 1-132, washing the potassium hydroxide solution on the surface of the rare earth cathode filament 1 with water to facilitate the subsequent process;

[0069] Step 1-133, controlling the pH value of the neutralizing liquid to be around 5-7, preferably the pH value of the neutralizing liquid is 6, and the neutralizing liquid makes the surface of the rare earth cathode filament 1 neutral in pH value, to facilitate storage and subsequent processes;

[0070] Step 1-134, washing the rare earth cathode filament 1 with tap water combined with an ultrasonic cleaning device, which is beneficial for the removal of small residues on the surface of the rare earth cathode filament 1;

[0071] Step 1-135, washing the rare earth cathode filament 1 with pure water combined with an ultrasonic cleaning device, which further removes all mineral residues on the surface of the rare earth cathode filament 1, ensuring the surface quality of the rare earth cathode filament 1;

[0072] Step 1-136, the moisture on the surface of the rare earth cathode filament 1 is dried to facilitate the storage of the winding, the rare earth cathode filament 1 can be dried by using anhydrous ethanol or / and using a far infrared heating method with adjustable temperature and automatic constant temperature, the anhydrous ethanol dehydration can make the drying not require too high temperature to achieve the drying requirement, the far infrared heating method with adjustable temperature and automatic constant temperature can control the drying temperature, which can avoid the risk of oxidation of the activated tungsten surface at too high temperature;

[0073] Step 1-137, the dried rare earth cathode filament 1 is regularly placed in the first container to facilitate the workers to take the material and shape.

[0074] The above rare earth cathode filament 1 cleaning process can ensure the surface quality of the rare earth cathode filament 1, and facilitate the welding of the rare earth cathode filament 1.

[0075] Further, in the embodiment, the shaping of the rare earth cathode filament 1 in step 1-14 specifically includes the following steps:

[0076] Step 1-141, connecting the rare earth cathode filament 1 to a 0-12V adjustable linear power supply;

[0077] Step 1-142, using the adjustable linear power supply to output a gradually increasing parabolic current to the rare earth cathode filament 1, and then output a gradually decreasing parabolic current, the whole output current process is gradually increasing and then gradually decreasing, for example, first gradually increasing the current from 0 to 4A in 7s, then continuously outputting 4A current for 3s, and then gradually decreasing the current from 4A to 0 in 5s, so as to form a metal memory of the rare earth cathode filament 1 and complete the shaping of the rare earth cathode filament 1.

[0078] As a preferred embodiment, the insulating seat 3 is preferably a ceramic seat, the connecting electrode rod 4 is made of 98% molybdenum and 2% rare earth elements, the connecting electrode rod 4 includes a molybdenum rod 41 and a sheet-shaped molybdenum block 42 integrally formed, and the surface treatment process of the connecting electrode rod 4 in step 1 includes the following steps:

[0079] Step 1-21, placing the connecting electrode rod 4 into an electrolyte containing 5% potassium hydroxide, and using a frequency adjustable direct current power supply for primary electrolysis to remove the oil stains attached during winding of the connecting electrode rod 4;

[0080] Step 1-22, washing away the potassium hydroxide solution on the surface of the connecting electrode rod 4 to facilitate the subsequent process;

[0081] Step 1-23, slightly etching the surface of the connecting electrode rod 4 by using chromium sulfate acid to make the surface of the connecting electrode rod 4 rough to facilitate welding;

[0082] Step 1-24, a second groove is processed on the connecting electrode rod 4 by using the electric spark processing technology, and the second groove is located on the molybdenum block 42;

[0083] Step 1-25, the connecting electrode rod 4 is washed by using tap water combined with the ultrasonic cleaning equipment, and the tap water combined with the ultrasonic cleaning equipment is used to clean the small residues on the surface of the connecting electrode rod 4;

[0084] Step 1-26, the connecting electrode rod 4 is washed by using pure water combined with the ultrasonic cleaning equipment, and the deionized water (pure water) ultrasonic cleaning is used to further remove all mineral residues on the surface of the connecting electrode rod 4, so as to ensure the surface quality of the connecting electrode rod 4;

[0085] Step 1-27, the moisture on the surface of the connecting electrode rod 4 is dried, and the connecting electrode rod 4 can be dried by using anhydrous ethanol dehydration or / and using a far infrared heating temperature adjustable and automatic constant temperature method. The anhydrous ethanol dehydration can make the drying not require too high temperature to meet the drying requirements, and the far infrared heating temperature adjustable and automatic constant temperature method can make the drying temperature controllable, so as to avoid the risk of oxidation of the tungsten surface in the activated state.

[0086] Step 1-28, the dried connecting electrode rod 4 is regularly placed in the second container, so as to facilitate the workers to take the material for welding.

[0087] As a preferred embodiment, the transition connecting tantalum body 2 is a sheet structure made of pure tantalum, and in the embodiment, the connecting feet 12 are vertically arranged, and at least two transition connecting tantalum bodies 2 arranged from top to bottom are connected to each connecting foot 12, so as to lock the connecting feet 12 of the rare earth cathode filament 1 by the two transition connecting tantalum bodies 2. In step 1, the surface treatment processing procedure of the transition connecting tantalum body 2 includes the following steps:

[0088] Step 1-31, the transition connecting tantalum body 2 is placed into an electrolyte containing 5% potassium hydroxide, and a frequency adjustable direct current power supply is used for primary electrolysis to remove the oil stains attached during the manufacturing of the transition connecting tantalum body 2;

[0089] Step 1-32, the potassium hydroxide solution on the surface of the transition connecting tantalum body 2 is washed away by water, so as to facilitate the subsequent process;

[0090] Step 1-33, the surface of the transition connecting tantalum body 2 is slightly etched by using chromium sulfate acid, so that the surface of the transition connecting tantalum body 2 becomes rough, so as to facilitate welding;

[0091] Step 1-34, water washing the transition connection tantalum body 2 by tap water combined with ultrasonic cleaning equipment, which is conducive to the removal of fine residues on the surface of the transition connection tantalum body 2;

[0092] Step 1-35, water washing the transition connection tantalum body 2 by pure water combined with ultrasonic cleaning equipment, which further removes all mineral residues on the surface of the transition connection tantalum body 2, ensuring the surface quality of the transition connection tantalum body 2 and facilitating the connection with the connecting leg 12 and the connecting electrode rod 4;

[0093] Step 1-36, drying the transition connection tantalum body 2, which dries the moisture on the surface of the transition connection tantalum body 2 for easy storage of the wire. The transition connection tantalum body 2 can be dried by anhydrous ethanol dehydration or / and by a far infrared heating method with adjustable and automatic constant temperature. Anhydrous ethanol dehydration can achieve the drying requirement without too high temperature, and the far infrared heating method with adjustable and automatic constant temperature can control the drying temperature, both of which can avoid the risk of oxidation of the tungsten surface in the activated state due to too high temperature;

[0094] Step 1-37, placing the transition connection tantalum body 2, which regularly places the dried transition connection tantalum body 2 in the third container for workers to take and weld.

[0095] In this embodiment, step 2 specifically includes the following steps:

[0096] Step 2-1, arranging and stacking the connecting leg 12, the transition connection tantalum body 2 and the sheet-shaped molybdenum block 42 of the connecting electrode rod 4 on the positioning mold in sequence, and then applying pressure to the connecting leg 12 by using the resistance welding equipment. After being pressed, the connecting leg 12 pushes the transition connection tantalum body 2 to bend and deform and embed into the second groove of the connecting electrode rod 4, and at the same time, the transition connection tantalum body 2 also forms a first groove matched with the connecting leg 12 by bending and deforming. The pressure applied by the resistance welding equipment to the connecting leg 12 is 30 kg, and the pressure application time is 9 s.

[0097] Step 2-2, after executing step 2-1, the resistance welding equipment is powered on to weld the connecting leg 12, the transition connection tantalum body 2 and the connecting electrode rod 4 together, completing the preliminary connection of the connecting electrode rod 4, the transition connection tantalum body 2 and the rare earth cathode wire 1. The power-on welding time of the resistance welding equipment is 4 s, the power-on welding current is 100 A, and the power-on welding voltage is about 1-2 V. Inert gas protection is adopted during the welding process.

[0098] Step 2-3, the sheet-shaped molybdenum block 42 connecting the connecting foot 12 and the connecting electrode rod 4 is welded by using a laser welding device, so as to further improve the fixing quality of the rare earth cathode filament 1 on the connecting electrode rod 4, and inert gas protection is used in the welding process, in addition, the sheet-shaped molybdenum block 42 can be provided with a third groove for locally embedding the connecting foot 12, so as to further improve the combination quality between the connecting foot 12 and the sheet-shaped molybdenum block 42;

[0099] Step 2-4, two connecting electrode rods 4 are inserted and fixed on the insulating seat 3, and the combination and installation of the whole cathode assembly are completed.

[0100] Step 2-5, first, the rare earth cathode filament 1 is inserted into the shaping support, specifically, the shaping rod of the shaping support is inserted into the inner circle of the rare earth cathode filament 1, so that the rare earth cathode filament 1 is spirally wound on the outer periphery of the shaping rod of the shaping support, and then the cathode assembly is powered to be shaped and hardened, so as to realize the shaping and hardening treatment of the combined and installed rare earth cathode filament 1, the transition connecting tantalum body 2 and the two connecting electrode rods 4, and obtain the finished product of the cathode assembly.

[0101] In the embodiment, step 2-5 includes the following steps:

[0102] Step 2-51, the rare earth cathode filament 1 is connected to a 0-12V adjustable linear power supply;

[0103] Step 2-52, the adjustable linear power supply is used to output the current in a parabolic shape gradually increasing and then gradually decreasing to the rare earth cathode filament 1, and the whole output current process is gradually increasing and then gradually decreasing, for example, first gradually increasing the current from 0 to 4A in 7s, then continuously outputting 4A current for 3s, and then gradually decreasing the current from 4A to 0 in 5s, so as to make the rare earth cathode filament 1 re-form the metal memory and complete the final shaping of the rare earth cathode filament 1.

[0104] In the embodiment, the shaping support includes a shaping rod and support rods located at both ends of the shaping rod, the shaping rod is inserted into the inner circle of the rare earth cathode filament 1, and is used to prevent the rare earth cathode filament 1 from deforming. Embodiment 2:

[0105] Referring to Figure 4 , the structure of the embodiment 1 and the embodiment 2 is basically the same, and the difference lies in that the connecting foot 12 is horizontally arranged, and at least two transition connecting tantalum bodies 2 arranged from left to right are connected to each connecting foot 12.

[0106] The above only describes the preferred embodiments of the present application, and any technical solutions achieving the same purpose by basically the same means are within the protection scope of the present application.

Claims

1. A fabrication process for high-frequency electromagnetic cathode components for satellite communication, characterized by: It comprises the following steps: Step 1, prepare the rare earth cathode filament (1), the transition connection tantalum body (2), the insulating seat (3) and two connecting electrode rods (4), wherein the rare earth cathode filament (1) comprises a rare earth cathode filament body (11) and two connecting feet (12) respectively arranged on both ends of the rare earth cathode filament body (11); two connecting electrode rods (4) each comprise a molybdenum rod (41) and a sheet-shaped molybdenum block (42) integrally formed, and each of the connecting electrode rods (4) is provided with a second groove on the sheet-shaped molybdenum block (42); Step 2, the connecting electrode rod (4), the transition connection tantalum body (2), the rare earth cathode filament (1) are welded and combined together, wherein the connecting feet (12), the transition connection tantalum body (2) and the sheet-shaped molybdenum block (42) are stacked in sequence, the connecting feet (12) are pressed by using a resistance welding device, the connecting feet (12) are pressed to push the transition connection tantalum body (2) to be bent and deformed and embedded into the second groove of the connecting electrode rod (4), at the same time, the transition connection tantalum body (2) is also bent and deformed to form a first groove matched with the connecting feet (12), then the transition connection tantalum body (2) is welded in the second groove, and the connecting feet (12) of the rare earth cathode filament (1) are welded and matched in the first groove; then the two connecting electrode rods (4) are inserted and matched on the insulating seat (3).

2. The satellite communication high frequency electromagnetic cathode assembly processing procedure of claim 1, wherein: The rare earth cathode filament body (11) is spiral-shaped, and two connecting feet (12) are integrally formed on both ends of the rare earth cathode filament body (11).

3. The satellite communication high frequency electromagnetic cathode assembly processing procedure of claim 1, wherein: In step 1, the cathode filament manufacturing process is included, and the cathode filament manufacturing process of the rare earth cathode filament (1) comprises the following steps: Step 1-11, the rare earth cathode filament (1) is wound, a tungsten wire is wound into a spiral-shaped rare earth cathode filament body (11) by using a wire winding machine, and connecting feet (12) are left at both ends of the rare earth cathode filament body (11), wherein the tungsten wire is made of 98% tungsten and 2% rare earth elements; Step 1-12, the rare earth cathode filament (1) is shaped, the rare earth cathode filament (1) is shaped by manual work, so that a plurality of rare earth cathode filaments (1) have the same size; Step 1-13, the rare earth cathode filament (1) is cleaned, the rare earth cathode filament (1) is cleaned to remove oil stains on the surface of the rare earth cathode filament (1); Step 1-14, the rare earth cathode filament (1) is shaped, the rare earth cathode filament (1) is hardened by electrically shaping.

4. The satellite communication high frequency electromagnetic cathode assembly processing procedure of claim 3, wherein: The rare earth cathode filament (1) cleaning of step 1-13 specifically comprises the following steps: Step 1-131, the rare earth cathode filament (1) is placed in an electrolyte containing 10% potassium hydroxide, and first-order electrolysis is performed by using a frequency-adjustable direct current power supply to remove oil stains attached during winding of the rare earth cathode filament (1), and the leveling effect of the high-frequency direct current power supply is used to remove the coarse and high texture generated during manufacturing of the rare earth cathode filament (1); Step 1-132, the potassium hydroxide solution on the surface of the rare earth cathode filament (1) is washed away by water; Step 1-133, the pH value of the neutralizing liquid is controlled to be 5-7, and the neutralizing liquid makes the surface pH value of the rare earth cathode filament (1) neutral; Step 1-134, the rare earth cathode filament (1) is washed by tap water combined with an ultrasonic cleaning device; Step 1-135, washing the rare earth cathode filament (1) with pure water and ultrasonic cleaning equipment; Step 1-136, drying the water on the surface of the rare earth cathode filament (1); Step 1-137, placing the dried rare earth cathode filament (1) regularly in the first container to facilitate workers to take the material and shape.

5. The satellite communication high frequency electromagnetic cathode assembly processing procedure of claim 3, wherein: The shaping of the rare earth cathode filament (1) of step 1-14 specifically includes the following steps: Step 1-141, connecting the rare earth cathode filament (1) to a 0-12V adjustable linear power supply DC; Step 1-142, using the adjustable linear power supply to output gradually increasing parabolic current to the rare earth cathode filament (1), and then output gradually decreasing parabolic current, so that the rare earth cathode filament (1) forms a metal memory, and the shaping of the rare earth cathode filament (1) is completed.

6. The satellite communication high frequency electromagnetic cathode assembly processing process according to claim 1, characterized in that: The surface treatment process of the connecting electrode rod (4) is included in step 1, and the surface treatment process of the connecting electrode rod (4) includes the following steps: Step 1-21, placing the connecting electrode rod (4) into an electrolyte containing 5% potassium hydroxide and performing first-stage electrolysis using a frequency-adjustable DC power supply; Step 1-22, washing off the potassium hydroxide solution on the surface of the connecting electrode rod (4); Step 1-23, slightly etching the surface of the connecting electrode rod (4) with chromium sulfate; Step 1-24, using electric spark processing technology to process a second groove on the connecting electrode rod (4), which is located on the sheet-shaped molybdenum block (42); Step 1-25, washing the connecting electrode rod (4) with tap water and ultrasonic cleaning equipment; Step 1-26, washing the connecting electrode rod (4) with pure water and ultrasonic cleaning equipment; Step 1-27, drying the water on the surface of the connecting electrode rod (4); Step 1-28, placing the dried connecting electrode rod (4) regularly in the second container.

7. The satellite communication high frequency electromagnetic cathode assembly processing process according to claim 1, characterized in that: The transition connecting tantalum body (2) is a sheet-shaped structure made of pure tantalum.

8. The satellite communication high frequency electromagnetic cathode assembly processing process of claim 1, wherein: Step 2 specifically includes the following steps: Step 2-1, arranging and stacking the connecting leg (12), the transition connecting tantalum body (2) and the sheet-shaped molybdenum block (42) of the connecting electrode rod (4) in turn, and then applying pressure to the connecting leg (12) using a resistance welding device, the connecting leg (12) is deformed and embedded into the second groove of the connecting electrode rod (4) after being pressed, and at the same time, the transition connecting tantalum body (2) also forms a first groove matched with the connecting leg (12) through bending deformation; Step 2-2, after step 2-1 is performed, the resistance welding device is powered on to weld the connecting leg (12), the transition connecting tantalum body (2) and the connecting electrode rod (4) together; Step 2-3, welding the connecting leg (12) and the connecting electrode rod (4) using a laser welding device; Step 2-4, inserting and fixing the two connecting electrode rods (4) on the insulating seat (3) to complete the assembly and installation of the entire cathode assembly; Step 2-5, first inserting the rare earth cathode filament (1) into the shaping support, and then electrifying and shaping the cathode assembly to realize the shaping and hardening treatment of the combined and installed rare earth cathode filament (1), the transition connecting tantalum body (2) and the two connecting electrode rods (4), and obtain the finished cathode assembly product.

9. The satellite communication high frequency electromagnetic cathode assembly processing process according to claim 8, characterized in that: Step 2-5 includes the following steps: Step 2-51, connecting a direct current of an adjustable linear power supply to the rare earth cathode filament (1); Step 2-52, outputting a gradually increasing parabolic current to the rare earth cathode filament (1) by using the adjustable linear power supply, and then outputting a gradually decreasing parabolic current, so that the rare earth cathode filament (1) re-forms metal memory and completes the final shaping of the rare earth cathode filament (1).

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