Assembly process of a die assembly

Abstract

This invention provides an assembly process for a die assembly, comprising a cathode assembly, an anode assembly, and an exhaust pipe assembly. The assembly process includes the following steps: pressing the magnetic pole K side, pressing the cathode, welding the entire die, leak detection, venting, removing the anodized layer, pressing the antenna cap, die withstand voltage testing, and die aging. During venting, the total venting time is 50-60 minutes, and the heating temperature is 580℃-680℃. The venting process consists of 12 steps, and the pressure change is controlled by time, filament current, and anode voltage. Venting removes air from the die assembly, creating a vacuum. The heating temperature of 580℃-680℃ is used to release gas from the die components and further improves the vacuum level using the principle of gas thermal expansion and contraction. It also prevents melting of the first and second welded positions. The pressure change control through time, filament current, and anode voltage allows for more precise control.

Description

Technical Field

[0001] This invention relates to the field of magnetrons, and more specifically, to an assembly process for a core assembly. Background Technology

[0002] A magnetron is an electrovacuum device used to generate microwave energy. Electrons inside the magnetron, under the control of mutually perpendicular constant magnetic and electric fields, interact with a high-frequency electromagnetic field, converting the energy obtained from the constant electric field into microwave energy, thus achieving the purpose of generating microwave energy. Figure 1 As shown, the core component of the magnetron is the core assembly, which includes a cathode assembly, an anode assembly, and an exhaust pipe assembly.

[0003] The prior art patent application CN202011280577.4 discloses an assembly process for a core assembly, including the following steps: S1. Component assembly: assembly of the cathode assembly, assembly of the anode assembly, and assembly of the exhaust pipe assembly; S2. Core assembly assembly: assembling the assembled cathode assembly, anode assembly, and exhaust pipe assembly together to form a core assembly; S3. Assembling the core assembly with other components to obtain the finished magnetron. The core assembly assembly includes: pressing the K-side of the magnetic pole, pressing the cathode, overall welding, leak detection of the core assembly, venting, removing the oxide layer from the anode assembly, installing the antenna cap; deburring, and aging. Although this patent mentions venting, it does not specify how to vent or how to protect the welded joints of the magnetron core.

[0004] How to design an assembly process for the magnetron core assembly that can both vent air and protect the welded joints of the magnetron core is a problem that urgently needs to be solved in the field of magnetrons. Summary of the Invention

[0005] In view of this, the present invention aims to propose an assembly process for a core assembly to solve the problem that the prior art does not specifically address how to vent air and how to protect the welded joints of the magnetron core.

[0006] To achieve the above objectives, the technical solution of the present invention is implemented as follows:

[0007] An assembly process for a core assembly is disclosed, comprising a cathode assembly, an anode assembly, and an venting pipe assembly. The assembly process includes the following steps: pressing the magnetic pole K side, pressing the cathode, welding the entire tube, core leak detection, venting, removing the anodized layer, pressing the antenna cap, core withstand pressure testing, and core aging. During venting, the total venting time is 50-60 minutes, and the heating temperature is 580℃-680℃. The venting process consists of 12 steps, and the pressure change is controlled by time, filament current, and anode voltage. Venting removes air from the core assembly, creating a vacuum. The heating temperature of 580℃-680℃ during venting is used to release gas from the core components, further increasing the vacuum level by utilizing the principle of gas thermal expansion and contraction. It also prevents melting of the first and second welded positions. The venting process, by controlling the pressure change through time, filament current, and anode voltage, allows for more precise control, ensuring the sealing performance of the magnetron core and improving the yield rate.

[0008] Furthermore, during venting, the leak-checked tube cores are placed sequentially on the venting fixture, the insulation cover is closed, and venting and heating are started. Once venting is complete and the required vacuum level is reached, heating is stopped, and the tubes are cut. The cut tube cores are placed in a special iron frame. Vacuuming is stopped, nitrogen purging is initiated, and the tail material is removed. The insulation cover, together with the venting fixture, forms a sealed space, facilitating vacuuming to remove internal air. Furthermore, the insulation cover ensures that the heating temperature does not drop.

[0009] Furthermore, when placing the tube cores sequentially on the exhaust fixture, the terminals should be placed horizontally aligned and the insulation cover should be clamped to ensure good contact between the tube core terminals and the electrodes, so as to avoid arcing and blackening of the terminals.

[0010] Furthermore, when the vacuum degree is 6.0 × 10 -6 torr / 6.0×10 -4 When Pa is reached, heating is initiated. Heating facilitates the cutting and sealing of the first section of the core assembly.

[0011] Furthermore, when the vacuum degree is 3.5 × 10 -7 torr / 5.0×10 -5 When the vacuum level reaches 3.5 × 10⁻⁷ torr / 5.0 × 10⁻⁵ Pa, the tube is cut and sealed at the open end of the first tube section to prevent air from entering the tube core again.

[0012] Furthermore, when cutting the pipe, the scissors are held level and perpendicular to the machine, and the cut end of the pipe is flush with the terminal.

[0013] Furthermore, the total exhaust time is 50 minutes, and the heating temperature during exhaust is 580℃~680℃.

[0014] Furthermore, the total exhaust time is 60 minutes, and the heating temperature during exhaust is 580℃~680℃.

[0015] Furthermore, the total exhaust time is 50 minutes, and the heating temperature during exhaust is 580°C.

[0016] Furthermore, the total exhaust time is 60 minutes, and the heating temperature during exhaust is 600°C.

[0017] The present invention proposes an assembly process for a die assembly. Compared with the prior art, the assembly process for a die assembly described in the present invention has the following advantages:

[0018] 1) The assembly process of the core assembly described in this invention includes an exhaust operation that removes air from the core assembly, creating a vacuum state. The heating temperature during exhaust is 580℃~680℃, used for venting the core components. At the same time, the principle of thermal expansion and contraction of gas is used to further improve the vacuum level. In addition, it can prevent the first and second welding positions from melting. The exhaust process uses time, filament current and anode voltage to regulate pressure changes, making the regulation more precise. This helps to ensure the sealing performance of the magnetron core and improve the yield rate.

[0019] 2) In the assembly process of the core assembly described in this invention, when the cores are placed sequentially on the exhaust fixture, the terminals are placed horizontally aligned and the heat insulation cover is clamped to ensure good contact between the core terminals and the electrodes, so as to avoid arcing and blackening of the terminals. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the cross-sectional structure of a magnetron in the prior art;

[0021] Figure 2 This is a process flow diagram of the magnetron assembly described in this invention;

[0022] Figure 3 A detailed process flow diagram of the assembly of the die assembly described in this invention;

[0023] Figure 4 This is a three-dimensional structural diagram of the venting process of the ferrule assembly during the assembly process of a ferrule assembly according to an embodiment of the present invention.

[0024] Figure 5 This is a schematic diagram of the sandblasting equipment used in the assembly process of a core assembly according to an embodiment of the present invention;

[0025] Figure 6 This is a schematic diagram of the sandblasting fixture used in the assembly process of a core assembly according to an embodiment of the present invention.

[0026] Figure 7 This is a schematic diagram of the structure of the antenna cap device used in the assembly process of a die assembly according to an embodiment of the present invention;

[0027] Figure 8 This is a three-dimensional structural diagram of the antenna cap according to an embodiment of the present invention;

[0028] Figure 9 This is a three-dimensional structural schematic diagram of the screening and orientation device of the pressure antenna cap equipment used in the assembly process of a core assembly according to an embodiment of the present invention;

[0029] Figure 10 This is a three-dimensional structural diagram of the chip assembly after the antenna cap is installed in the assembly process of the chip assembly according to an embodiment of the present invention.

[0030] Explanation of reference numerals in the attached figures:

[0031] 1. Cathode assembly; 2. Anode assembly; 3. Exhaust pipe assembly; 31. First pipe section; 32. Sealing; 41. First welding position; 42. Second welding position; 5. Antenna cap; 51. First mounting surface; 52. Mounting hole; 61. Second mounting surface; 6. Terminal; 10. Antenna cap pressing device; 11. Screening and adjusting device; 111. Adjusting structure; 1111. First adjusting rod; 1112. Second adjusting rod; 112. Vibration structure; 1121. Central shaft; 113. Conveying structure; 1131. First track; 1132. 114. Second track; 115. Material bucket; 116. Vibrating plate; 12. Drive device; 13. Pressure head; 14. Pressure cap fixture; 100. Sandblasting equipment; 101. Sand storage bin; 102. Compressed gas bin; 103. Transport pipeline; 104. First pipeline; 105. Nozzle; 107. Drive motor; 108. Sandblasting fixture; 1081. Upper mold; 10811. First annular boss; 10812. First receiving cavity; 1082. Lower mold; 10821. Second annular boss; 10822. Second receiving cavity. Detailed Implementation

[0032] It should be noted that, unless otherwise specified, the embodiments and features described in the embodiments of the present invention can be combined with each other. The descriptions of "first," "second," etc., mentioned in the embodiments of the present invention are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by the present invention.

[0033] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0034] Example 1

[0035] An assembly process for a die assembly, such as Figure 2 As shown, it includes the following steps:

[0036] Component assembly: assembly of cathode assembly 1, assembly of anode assembly 2, and assembly of exhaust pipe assembly 3;

[0037] Assembly of the core assembly: The assembled cathode assembly 1, anode assembly 2 and exhaust pipe assembly 3 are assembled together to form the core assembly;

[0038] Finished product assembly: The magnetron is obtained by assembling the core assembly and other components.

[0039] Specifically, such as Figure 3 As shown, the assembly of the die assembly includes the following steps:

[0040] Pressing the magnetic pole K side: Connect the anode assembly 2 and the magnetic pole K side and press them together;

[0041] Cathode pressing: Assembling cathode assembly 1 and anode assembly 2 together;

[0042] Welding the entire tube: The anode assembly 2 and the exhaust pipe assembly 3 after cathode pressing are assembled together to form the core assembly, and then welded as a whole;

[0043] Core leak detection: Detecting leaks in the core assembly;

[0044] Venting: Venting the tube core assembly;

[0045] Removal of the anodic oxide layer: Sandblasting removes the oxide layer from anode assembly 2;

[0046] Press the antenna cap: Press the antenna cap 5 onto the tube core;

[0047] Core pressure resistance test.

[0048] The core is mature.

[0049] like Figure 4 As shown, the core assembly before exhaust has an open first pipe section 31 on one side and a terminal 6 on the other side. During use, the core assembly needs to expel internal air to create a vacuum and seal the first pipe section 31. The welding point between the cathode assembly 1 and the anode assembly 2 is the first welding point 41, and the welding point between the exhaust pipe assembly 3 and the anode assembly 2 is the second welding point 42.

[0050] The venting process consists of 12 steps, in which pressure changes are controlled by time, filament current, and anode voltage. Venting removes air from the core assembly, creating a vacuum. The precise control of pressure changes through time, filament current, and anode voltage ensures better sealing of the magnetron core and improves yield.

[0051] Specifically, place the leak-tested tube cores one by one on the exhaust fixture, cover with the insulation cover, and start the exhaust and heating; when the exhaust is completed and the vacuum degree reaches the required level, stop the heating and cut the tubes, and put the cut tube cores into a special iron frame; stop the vacuuming, press the nitrogen purging button, and pull out the tail material.

[0052] The insulation cover, together with the exhaust fixture, forms a sealed space, facilitating vacuuming to remove internal air; on the other hand, the insulation cover ensures that the heating temperature does not drop.

[0053] More specifically, when the tube cores are placed sequentially on the exhaust fixture, the terminals 6 of the cathode assembly 1 are horizontally aligned and the insulation cover is clamped. This ensures good contact between the tube core terminals 6 and the electrodes to prevent arcing and blackening of the terminals 6.

[0054] Specifically, when the vacuum degree is 6.0 × 10 -6 torr / 6.0×10 -4 When Pa is reached, heating is initiated. Heating facilitates the cutting and sealing of the first tube segment 31 of the core assembly 32.

[0055] Specifically, when the vacuum degree is 3.5 × 10 -7 torr / 5.0×10 -5 When the vacuum level reaches 3.5 × 10⁻⁷ torr / 5.0 × 10⁻⁵ Pa, the tube is cut and sealed at the open end of the first tube section 31 to ensure that air no longer enters the tube core.

[0056] More specifically, such as Figure 4 As shown, when cutting the pipe, the scissors are held horizontally and perpendicular to the machine base, and the pipe-cutting seal 32 is flush with the terminal 6. The upper end of the seal 32 and the line connecting the two terminals 6 are in the same plane.

[0057] More specifically, such as Figure 10 As shown, on the antenna cap production line, the antenna cap 5 is fitted onto the seal 32.

[0058] Specifically, during the venting process and when cutting the pipe, pay attention to changes in the vacuum level and immediately eliminate any abnormalities.

[0059] Specifically, be careful to handle each step gently to prevent the filament from breaking.

[0060] During the venting process, the total venting time is 50 to 60 minutes, and the heating temperature during venting is 580°C to 680°C. This facilitates the cutting of the first tube section 31 of the core assembly and the sealing of the opening 32, while preventing the first welding position 41 and the second welding position 42 from melting.

[0061] Preferably, in this embodiment, the exhaust time is 50 minutes, the heating temperature during exhaust is 580°C, the number of exhausts is 50 per cycle, the filament current error is ±1A, and the anode voltage error is ±20V. The specific process parameters for the time, filament current, and anode voltage of the 12 steps are shown in Table 1.

[0062] Table 1

[0063]

[0064] After the die assembly has been vented, the anodized layer must be removed. Removing the anodized layer requires using a sandblasting machine (e.g., 100mm). Figure 5 As shown, the sandblasting equipment 100 includes a sand storage chamber 101 and a compressed gas chamber 102. A transport pipe 103 is installed on the sand storage chamber 101, and the compressed gas chamber 102 is connected to the transport pipe 103. A nozzle 105 is installed at the end of the transport pipe 103, and the nozzle 105 cooperates with the anode assembly 2. The sandblasting fixture 108 can drive the magnetron core to rotate. Sand flows from the sand storage chamber 101 into the transport pipe 103 and, driven by the compressed gas, is sprayed onto the magnetron core through the nozzle 105 to remove the oxide layer on the anode assembly 2. The compressed gas chamber 102 is connected to the transport pipe 103, and the compressed gas provides power for removing the oxide layer on the anode assembly. This sandblasting equipment 100 can remove the oxide layer on the anode assembly 2, ensuring the thermal conductivity of the magnetron core.

[0065] Specifically, a weld protection structure is provided on the sandblasting fixture 108. This weld protection structure on the sandblasting fixture 108 protects the weld joints of the magnetron core from damage; otherwise, the magnetron core would leak air.

[0066] More specifically, the weld protection structure includes a first weld protection structure and a second weld protection structure.

[0067] More specifically, such as Figure 4 and Figure 6 As shown, the first weld protection structure is configured as a first annular boss 10811, which mates with the first weld position 41 of the magnetron die. The first annular boss 10811 is provided to protect the first weld position 41 of the magnetron die.

[0068] More specifically, such as Figure 4and Figure 6 As shown, the protective structure for the second weld portion is configured as a second annular boss 10821, which mates with the second weld position 42 of the magnetron die. The second annular boss 10821 is provided to protect the second weld position 42 of the magnetron die.

[0069] More specifically, such as Figure 6 As shown, the sandblasting fixture 108 includes an upper mold 1081 and a lower mold 1082. The first annular boss 10811 is disposed below the upper mold 1081, and the second annular boss 10821 is disposed above the lower mold 1082. The first annular boss 10811 is disposed below the upper mold 1081 to facilitate cooperation with the first welding position 41 of the magnetron core, and the second annular boss 10821 is disposed above the lower mold 1082 to facilitate cooperation with the second welding position 42 of the magnetron core.

[0070] More specifically, such as Figure 6 As shown, a first receiving cavity 10812 is also provided on the upper mold 1081, which cooperates with the cathode assembly 1 of the magnetron core. A second receiving cavity 10822 is also provided on the lower mold 1082, which cooperates with the exhaust pipe assembly 3 of the magnetron core. The first receiving cavity 10812 is provided to accommodate and protect the cathode assembly 1 of the magnetron core; the second receiving cavity 10822 is provided to accommodate and protect the exhaust pipe assembly 3 of the magnetron core.

[0071] More specifically, preferably, in this embodiment, the sand in the sand storage chamber 101 is set as white jade sand, and the size of the white jade sand is 8 mesh. When the size of the white jade sand is 8 mesh, the sandblasting effect is the best; if the size of the white jade sand is too large, it will cause deformation of the outer surface of the anode component 2, and if the size of the white jade sand is too small, it will not be effective in removing the oxide layer on the outer surface of the anode component 2.

[0072] Preferably, in this embodiment, the weight of the compressed gas in the compressed gas chamber 102 is set to 4 kg. When the weight of the compressed gas in the compressed gas chamber 102 is set to 4 kg, the sandblasting effect is the best; if the weight of the compressed gas is too large, it will cause deformation of the outer surface of the anode component 2, and if the weight of the compressed gas is too small, it will not be effective in removing the oxide layer on the outer surface of the anode component 2.

[0073] More specifically, such as Figure 5 As shown, the compressed gas chamber 102 is connected to the transport pipeline 103 via the first pipeline 104.

[0074] Specifically, such as Figure 5 As shown, a drive motor 107 is provided above the sandblasting fixture 108. The drive motor 107 is connected to the sandblasting fixture 108 and drives the magnetron core on the sandblasting fixture 108 to rotate.

[0075] More specifically, a turntable is provided on the sandblasting equipment 100 for feeding and discharging materials. The turntable facilitates feeding and discharging.

[0076] Specifically, the sandblasting equipment 100 is manually operated.

[0077] The sandblasting time is usually 5-8 seconds, but the exact time depends on the equipment operation.

[0078] The following points should be noted during sandblasting:

[0079] a. Operators need to wear gloves, masks, protective glasses and earplugs to prevent sand from having an adverse effect on the human body;

[0080] b. Handle with care during each operation step;

[0081] c. Ensure that the oxide layer on the surface of anode assembly 2 is completely removed.

[0082] After the anode oxide layer of the die assembly has been removed, the antenna cap needs to be pressed. This pressing requires an antenna cap pressing device 10, such as... Figure 7 As shown, the antenna cap pressing device 10 is equipped with a screening and adjusting device 11, a driving device 12, a pressing head 13, and a pressing head fixture 14. The pressing head 13 is connected to the screening and adjusting device 11 and the driving device 12, and the driving device 12 is also connected to the screening and adjusting device 11 and the pressing head fixture 14. Under the combined action of the adjusting structure 111, the vibration structure 112, and the conveying structure 113 of the screening and adjusting device 11, the antenna cap 5 is conveyed to the pressing head 13, as shown. Figure 4 and Figure 5 As shown, the screening and orienting device 11 aligns the first mounting surface 51 of the antenna cap 5 with the second mounting surface 61 of the magnetron core. The driving device 12 drives the pressure head 13 to cooperate with the pressing cap fixture 14, pressing the antenna cap 5 onto the magnetron core on the pressing cap fixture 14. The orienting structure 111, vibration structure 112, and conveying structure 113 on the screening and orienting device 11 ensure that the first mounting surface 51 of the antenna cap 5 faces the second mounting surface 61 of the magnetron core. This prevents the magnetron core from being scrapped due to incorrect or slightly off-center orientation of the antenna cap 5, ensuring that the produced magnetron core has a good horizontal condition, ensuring its good microwave emission performance, and improving the yield of magnetrons in subsequent production.

[0083] Specifically, such as Figure 8As shown, a first mounting surface 51 is provided on the antenna cap 5, which is designed to mate with a second mounting surface 61 on the magnetron die. A mounting hole 52 is provided on the first mounting surface 51, which mates with a first segment 31 of the magnetron die. The shape and size of the mounting hole 52 on the antenna cap 5 are compatible with those of the first segment 31.

[0084] Specifically, such as Figure 9 As shown, a material hopper 114 is positioned below the material screening and adjusting device 11, and a vibrating plate 115 is positioned above the material hopper 114. The material hopper 114 is connected to the vibrating plate 115. The material hopper 114 is provided to provide space for holding the antenna cap 5 and to provide support for the vibrating plate 115.

[0085] More specifically, such as Figure 9 As shown, the directional adjustment structure 111 includes a first directional adjustment rod 1111 and a second directional adjustment rod 1112, both of which are connected to the vibrating disk 115. The first directional adjustment rod 1111 and the second directional adjustment rod 1112 are provided to adjust the direction of the antenna cap 5, making it easier for the antenna cap 5 to be installed on the magnetron core.

[0086] More specifically, such as Figure 9 As shown, both the first directional bar 1111 and the second directional bar 1112 are bent.

[0087] More specifically, such as Figure 9 As shown, one end of the first directional bar 1111 is connected to the vibrating plate 115, and the other end of the first directional bar 1111 is freely disposed. One end of the second directional bar 1112 is connected to the vibrating plate 115, and the other end of the second directional bar 1112 is freely disposed.

[0088] More specifically, such as Figure 9 As shown, the vibration structure 112 includes a central shaft 1121 and a first drive assembly, wherein the central shaft 1121 is connected to the first drive assembly.

[0089] More specifically, such as Figure 9 As shown, the central shaft 1121 is located at the bottom center of the vibratory plate 115, and a first drive assembly is located below the central shaft 1121. The first drive assembly is located inside the material barrel 114.

[0090] More specifically, such as Figure 9As shown, the material bucket 114 is connected to the vibrating plate 115 via a central shaft 1121. The first drive assembly drives the vibrating plate 115 to vibrate via the central shaft 1121, thereby causing the antenna cap 5 on the vibrating plate 115 to vibrate. The first drive assembly provides power for the vibration of the vibrating plate 115. The central shaft 1121 is used to connect the material bucket 114 and the vibrating plate 115; on the other hand, the central shaft 1121 transmits power for the vibration of the vibrating plate 115.

[0091] More specifically, such as Figure 9 As shown, the conveying structure 113 includes a spiral first track 1131 disposed on the vibrating plate 115 and a second track 1132 disposed outside the vibrating plate 115, wherein the first track 1131 is connected to the second track 1132. The spiral arrangement of the first track 1131 prolongs the process of adjusting the antenna cap 5, making it easier for all antenna caps 5 to be adjusted to the correct orientation.

[0092] More specifically, such as Figure 9 As shown, the second track 1132 is arranged in a herringbone shape. The herringbone arrangement of the second track 1132 is used to divide the antenna cap 5 into two paths for the antenna cap pressing process, reducing the number of screening and orientation devices, thereby reducing production costs.

[0093] More specifically, the end of the second track 1132 is connected to the pressure head 13. A device for clamping the antenna cap 5 is provided on the pressure head 13, and the driving device 12 drives the pressure head 13 to move toward the pressure cap fixture 14, pressing the antenna cap 5 onto the magnetron core on the pressure cap fixture 14.

[0094] Steps for pressing the antenna cap:

[0095] 1) Pour the corresponding antenna cap 5 into the screen material adjusting device 11;

[0096] 2) Place the core terminal 6 flush and horizontally onto the cap clamping fixture 14;

[0097] 3) The equipment automatically picks out qualified tube cores and puts them into the conveyor belt. The drive device 12 drives the pressure head 13 to move towards the pressure cap fixture 14, pressing the antenna cap 5 onto the magnetron tube core on the fixture.

[0098] 4) Defective cores left on the tooling will automatically return to the operating position.

[0099] Antenna cap requirements:

[0100] 1) The antenna cap 5 must be fully pressed into place. The antenna cap 5 should not be deformed after being pressed, and the antenna cap 5 should be able to withstand an axial tensile force of 3 kgf without loosening.

[0101] 2) The core exhaust pipe seal 32 has no signs of misalignment or impact damage, and the oxide layer on the outer surface of the anode cylinder has been completely removed.

[0102] 3) The antenna cap 5 must not have unpunched holes, cracks, oil stains, tarnish, etc.

[0103] 4) The die must be placed horizontally on the fixture, with terminal 6 aligned with the ceramic block on the fixture. It must not be placed crookedly.

[0104] 5) All operating steps must be handled with care to prevent the filament from breaking.

[0105] 6) Keep high-voltage parts and tooling clean to prevent leakage. Equipment parameters must not be adjusted without permission.

[0106] This embodiment proposes an assembly process for a die assembly. Compared with the prior art, the assembly process for a die assembly described in this embodiment has the following advantages:

[0107] 1) The assembly process of the core assembly described in this embodiment can remove air from the core assembly during the venting operation, making the interior a vacuum state. The heating temperature during venting is 580℃~680℃, which is used to release gas from the core components. At the same time, the principle of thermal expansion and contraction of gas is used to further improve the vacuum degree. In addition, it can also prevent the first and second welding positions from melting. The venting process controls the pressure change by time, filament current and anode voltage, making the control more precise, which helps to ensure the sealing performance of the magnetron core and improve the yield.

[0108] 2) In the assembly process of the core assembly described in this embodiment, when the cores are placed sequentially on the exhaust fixture, the terminals are placed horizontally aligned and the heat insulation cover is clamped to ensure good contact between the core terminals and the electrodes, so as to avoid arcing and blackening of the terminals.

[0109] Example 2

[0110] Unlike Example 1, the heating temperature during exhaust is 680°C, and the specific process parameters for the 12 steps are shown in Table 2.

[0111] Table 2

[0112]

[0113] Example 3

[0114] Unlike Example 1, the heating temperature during exhaust is 660°C, and the specific process parameters for the 12 steps are shown in Table 3.

[0115] Table 3

[0116]

[0117] Example 4

[0118] Unlike Example 1, the exhaust time is 60 minutes, and the heating temperature during exhaust is 600°C. The specific process parameters for the 12 steps are shown in Table 4.

[0119] Table 4

[0120]

[0121] While the present invention has been disclosed above, it is not limited thereto. Any person skilled in the art can make various modifications and alterations without departing from the spirit and scope of the invention; therefore, the scope of protection of the present invention should be determined by the scope defined in the claims.

Claims

1. An assembly process for a die assembly, characterized in that, For assembling magnetron core assemblies, the core assembly includes a cathode assembly (1), an anode assembly (2), and an exhaust pipe assembly (3). The assembly process of the core assembly includes the following steps: pressing the magnetic pole K side, pressing the cathode, welding the entire tube, core leak detection, venting, removing the anodic oxide layer, pressing the antenna cap, core withstand pressure test, and core aging. During venting, the total venting time is 50 min to 60 min, and the heating temperature during venting is 580℃ to 680℃. The venting process is divided into 12 steps. The venting process controls the pressure change through time, filament current, and anode voltage. The welding point between the cathode assembly (1) and the anode assembly (2) is the first welding point (41), and the welding point between the exhaust pipe assembly (3) and the anode assembly (2) is the second welding point (42). A sandblasting device (100) is used to remove the anodized layer. The sandblasting device (100) includes a sand storage chamber (101), a compressed gas chamber (102), and a sandblasting fixture (108). A transport pipe (103) is installed on the sand storage chamber (101). The compressed gas chamber (102) is connected to the transport pipe (103). A nozzle (105) is installed at the end of the transport pipe (103). The nozzle (105) is connected to the anode assembly (2). In coordination, a drive motor (107) is provided above the sandblasting fixture (108). The drive motor (107) is connected to the sandblasting fixture (108). The drive motor (107) drives the magnetron core on the sandblasting fixture (108) to rotate. The sand flows out from the sand storage bin (101) into the transport pipe (103). Driven by compressed gas, it is sprayed onto the magnetron core through the nozzle (105) to remove the oxide layer on the anode assembly (2). A welding protection structure is provided on the sandblasting fixture (108); The weld protection structure includes a first weld protection structure and a second weld protection structure; The first weld protection structure is configured as a first annular boss (10811), which cooperates with the first weld position (41) of the magnetron core. The second welding part protection structure is configured as a second annular boss (10821), and the second annular boss (10821) cooperates with the second welding position (42) of the magnetron core; The sandblasting fixture (108) includes an upper mold (1081) and a lower mold (1082). The first annular boss (10811) is located below the upper mold (1081), and the second annular boss (10821) is located above the lower mold (1082).

2. The assembly process of a die assembly according to claim 1, characterized in that, During the venting process, place the leak-checked tube cores one by one on the venting fixture, cover with the insulation cover, and start venting and heating; when venting is completed and the vacuum level meets the requirements, stop heating and cut the tubes, and put the cut tube cores into a special iron frame; stop vacuuming, press the nitrogen flushing button, and pull out the tail material.

3. The assembly process of a die assembly according to claim 2, characterized in that, When the tube cores are placed on the exhaust fixture in sequence, the terminals (6) of the cathode assembly (1) are placed horizontally aligned and the insulation cover is clamped.

4. The assembly process of a die assembly according to claim 2, characterized in that, When the vacuum degree is 6.0×10 - 6 torr / 6.0×10 -4 When Pa, start heating.

5. The assembly process of a die assembly according to claim 2, characterized in that, When the vacuum degree is 3.5×10 - 7 torr / 5.0×10 -5 When Pa is reached, the pipe is cut.

6. The assembly process of a die assembly according to claim 5, characterized in that, When cutting the pipe, the scissors are held flat and perpendicular to the machine, and the cut end (32) is flush with the terminal (6).

7. The assembly process of a die assembly according to claim 1, characterized in that, The total exhaust time is 50 minutes, and the heating temperature during exhaust is 580℃~680℃.

8. The assembly process of a die assembly according to claim 1, characterized in that, The total exhaust time is 60 minutes, and the heating temperature during exhaust is 580℃~680℃.

9. The assembly process of a die assembly according to claim 7, characterized in that, The total exhaust time is 50 minutes, and the heating temperature during exhaust is 580°C.

10. The assembly process of a die assembly according to claim 8, characterized in that, The total exhaust time is 60 minutes, and the heating temperature during exhaust is 600°C.

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