Detection device and detection method for simulating motion leakage rate of welding electron gun

Abstract

The invention provides a simulation welding electron gun motion leakage rate detection device and detection method, and relates to the technical field of sealing performance detection. The simulation welding electron gun movement leakage rate detection device comprises a medium sealing assembly, a pressure adjusting assembly and a leakage rate detection assembly, the medium sealing assembly comprises a groove plate, a mounting plate, a light-transmitting plate and an observation window, a groove is formed in a bottom plate of the groove plate, and a sealing ring is arranged in the groove; the mounting plate is slidably arranged in the groove plate, and an opening is formed in the bottom of the mounting plate. The device for detecting the leakage rate by simulating the movement of the welding electron gun can simulate the actual movement process of the welding electron gun, and adopts a pressure drop method to detect the leakage rate of the electron gun under the complex working conditions of speed fluctuation, medium pressure fluctuation, vibration generated by a machined workpiece and the like; therefore, the influence of different speeds, pressures and compression ratios on the sealing performance of the welding electron gun is studied, and compared with a traditional detection method, the method has a wider application range and higher authenticity.

Description

Technical Field

[0001] The present invention relates to the technical field of sealing performance detection, and particularly relates to a detection device and method for simulating the leakage rate of a moving welding electron gun. Background Art

[0002] Electron beam welding technology has been widely used in fields such as aerospace due to its many advantages. When an electron beam welding machine is operating normally, welding needs to be carried out in a vacuum environment to avoid the influence of gas ionization on the electron beam power and weld performance. To ensure the vacuum degree during operation, while ensuring the sealing performance of the welding vacuum chamber, the sealing of the welding electron gun is also crucial. When the welding electron gun is operating normally, there is reciprocating motion, and the sealing ring is prone to wear and failure during dynamic sealing, making it difficult to meet normal requirements. Due to the long moving stroke of the welding electron gun, the vibration generated during the installation and processing of workpieces will affect the compression of the sealing ring, thereby affecting its sealing performance. At the same time, during the actual processing process, affected by the external environment, the medium pressure inside the welding electron gun fluctuates, and the reciprocating speed will further affect its sealing performance. Therefore, studying the influence of speed, medium pressure fluctuation, and sealing ring compression rate on the sealing performance of the vacuum chamber is a difficult problem that needs to be solved in the actual welding electron gun at present. Currently, there is no unified standard for the detection method of the leakage rate of the moving welding electron gun under speed and pressure fluctuations, and during the actual processing process, it is difficult to determine the occurrence time and leakage rate size of leakage due to different compression rates of the sealing ring. Summary of the Invention

[0003] The present invention provides a detection device for simulating the leakage rate of a moving welding electron gun to solve the problem in the prior art that it is difficult to determine the occurrence time and leakage rate size of leakage due to different compression rates of the sealing ring.

[0004] The present invention provides a detection device for simulating the leakage rate of a moving welding electron gun, including: A medium sealing assembly, the medium sealing assembly includes: A groove plate, a groove is provided on the bottom plate of the groove plate, and a sealing ring is provided in the groove; A mounting plate, the mounting plate is slidably disposed inside the groove plate, and an opening is provided at the bottom of the mounting plate; A light-transmitting plate, covering the opening and fitting with the sealing ring; the light-transmitting plate, the sealing ring, and the groove plate cooperate to enclose a sealed cavity; An observation window, the observation window is provided in the mounting plate and abuts against the upper part of the light-transmitting plate; A pressure regulating assembly, communicating with the sealed cavity, the pressure regulating assembly is used to control the pressure in the sealed cavity; A leakage rate detection assembly, communicating with the sealed cavity, the leakage rate detection assembly is used to detect the pressure change in the sealed cavity.

[0005] According to a leakage rate detection device for simulating the movement of a welding electron gun provided by the present invention, a first step is provided on the inner side of the side wall of the mounting plate, and the observation window is connected to the first step.

[0006] According to a leakage rate detection device for simulating the movement of a welding electron gun provided by the present invention, a second step is provided on the edge of the opening, and the edge of the lower surface of the light-transmitting plate abuts against the second step.

[0007] According to a leakage rate detection device for simulating the movement of a welding electron gun provided by the present invention, the medium sealing assembly further includes: A pressing plate, which is connected to the upper part of the side wall of the groove plate and abuts against the mounting plate. The pressing plate is used to adjust the pressure applied to the mounting plate, and thus change the pressure applied by the light-transmitting plate to the sealing ring.

[0008] According to a leakage rate detection device for simulating the movement of a welding electron gun provided by the present invention, it further includes: A driving assembly, which is connected to the groove plate and the mounting plate. The driving assembly is used to drive the mounting plate to move relative to the groove plate.

[0009] According to a leakage rate detection device for simulating the movement of a welding electron gun provided by the present invention, the driving assembly includes: A motor; A nut seat, which is connected to the first end of the mounting plate; A first support seat, which is connected to the first end of the groove plate through an end plate; A lead screw, the first end of the lead screw is in threaded cooperation with the nut seat and is rotatably matched with the first support seat, and the second end of the lead screw is connected to the rotating shaft of the motor.

[0010] According to a leakage rate detection device for simulating the movement of a welding electron gun provided by the present invention, a three-way interface is provided on the bottom plate of the groove plate, and the first interface of the three-way interface is communicated with the sealing cavity; The pressure regulating assembly includes: An air pump; An air inlet pipe, one end of the air inlet pipe is communicated with the outlet of the air pump, and the other end of the air inlet pipe is communicated with the second interface of the three-way interface; a pressure regulating valve is connected in series on the air inlet pipe.

[0011] According to a leakage rate detection device for simulating the movement of a welding electron gun provided by the present invention, the leakage rate detection assembly includes: A pressure sensor, the air inlet of the pressure sensor is communicated with the third interface of the three-way interface through a connecting pipe.

[0012] According to a leakage rate detection device for simulating the movement of a welding electron gun provided by the present invention, the leakage rate detection device further includes: A data acquisition component, which is electrically connected to the pressure sensor and is used for acquiring and storing the pressure value detected by the pressure sensor.

[0013] The present invention also provides a method for detecting the leakage rate of a simulated welding electron gun movement. The detection method is based on the leakage rate detection device for simulating the movement of a welding electron gun described in any one of the above, and includes: Inputting a gas medium into the sealed cavity through a pressure regulating component and regulating the pressure in the sealed cavity; Driving the mounting plate to slide relative to the groove plate through a driving component to simulate the movement state of the electron gun under actual working conditions; Regulating the pressure in the sealed cavity to a predetermined pressure value through the pressure regulating component and recording the initial pressure value P1; Recording the pressure value P2 in the sealed cavity that changes with time t; Calculating the leakage rate according to the following formula (1) , (1) Wherein, represents the moving speed of the groove plate; By changing the pressure applied by the pressing plate to the mounting plate and calculating the leakage rates corresponding to different compression ratios.

[0014] The leakage rate detection device for simulating the movement of a welding electron gun provided by the present invention can simulate the actual movement process of a welding electron gun, and adopts the pressure drop method to detect the leakage rate of the electron gun under complex working conditions such as speed fluctuations, medium pressure fluctuations, and vibrations generated by processed workpieces, so as to study the influence of different speeds, pressures, and compression ratios on the sealing performance of the welding electron gun. Compared with traditional detection methods, it has a wider application range and higher authenticity. The medium sealing component is an equivalent model of the movement of the welding electron gun, provides a leakage rate detection device and method for the welding electron gun, and provides repeatable test conditions for it to ensure the accuracy of its measurement; at the same time, the observation window opened on the medium sealing component can observe the service state of the sealing ring during the movement of the electron gun in real time, which provides great convenience for timely discovering and solving problems. Description of the Drawings

[0015] To more clearly illustrate the technical solutions in the present invention or the prior art, the following will briefly introduce the accompanying drawings required for the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other accompanying drawings can also be obtained based on these drawings.

[0016] Figure 1 It is one of the three-dimensional structural schematic diagrams of the simulated welding electron gun movement leakage rate detection device provided by the present invention.

[0017] Figure 2 It is the exploded structural schematic diagram of the simulated welding electron gun movement leakage rate detection device provided by the present invention.

[0018] Figure 3 It is the top view structural schematic diagram of the simulated welding electron gun movement leakage rate detection device provided by the present invention.

[0019] Figure 4 It is along Figure 3 The side view sectional structural schematic diagram made along the section line A-A in

[0020] Figure 5 It is the three-dimensional structural schematic diagram of the groove provided by the present invention.

[0021] Figure 6 It is the second three-dimensional structural schematic diagram of the simulated welding electron gun movement leakage rate detection device provided by the present invention.

[0022] Reference numerals: 10. Medium sealing assembly; 11. Grooved plate; 12. Sealing ring; 13. Mounting plate; 14. Transparent plate; 15. Groove; 16. Observation window; 17. First step; 18. Second step; 19. Pressing plate; 20. Pressure regulating assembly; 21. Three-way interface; 22. Air pump; 23. Intake pipe; 24. Pressure regulating valve; 30. Leakage rate detection assembly; 31. Pressure sensor; 32. Connecting pipe; 40. Driving assembly; 41. Motor; 42. Nut seat; 43. First support seat; 44. Lead screw; 50. Data acquisition assembly. Detailed implementation manners

[0023] To make the objectives, technical solutions and advantages of the present invention clearer, the following will clearly and completely describe the technical solutions in the present invention in conjunction with the accompanying drawings in the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art without creative efforts based on the embodiments in the present invention belong to the scope of protection of the present invention.

[0024] In the description of the embodiments of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the embodiments of the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation on the embodiments of the present invention. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0025] In the description of the embodiments of the present invention, it should be noted that unless otherwise clearly specified and limited, the terms "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.

[0026] In the embodiments of the present invention, unless otherwise clearly specified and limited, the first feature being "on" or "under" the second feature can be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over", and "on" the second feature can be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath", and "under" the second feature can be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0027] In the description of this specification, the description referring to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the embodiments of the present invention. In this specification, the schematic descriptions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0028] The following is combined with Figures 1-6 Describe the specific structure of the analog welding electron gun motion leakage rate detection device of the present invention.

[0029] As Figure 1 shown and Figure 2 illustrated, the simulated welding electron gun movement leakage rate detection device includes a medium sealing assembly 10, a pressure regulating assembly 20, and a leakage rate detection assembly 30. The medium sealing assembly 10 includes a groove plate 11, a mounting plate 13, a light-transmitting plate 14, and an observation window 16. A groove 15 is provided on the bottom plate of the groove plate 11, and a sealing ring 12 is arranged in the groove 15. The mounting plate 13 is slidably arranged inside the groove plate 11, and an opening is provided at the bottom of the mounting plate 13. The light-transmitting plate 14 covers the opening and fits with the sealing ring 12; the light-transmitting plate 14, the sealing ring 12, and the groove plate 11 cooperate to enclose a sealed cavity. The observation window 16 is arranged in the mounting plate 13 and abuts against the upper part of the light-transmitting plate 14. The pressure regulating assembly 20 is communicated with the sealed cavity, and the pressure regulating assembly 20 is used to control the pressure in the sealed cavity. The leakage rate detection assembly 30 is communicated with the sealed cavity, and the leakage rate detection assembly 30 is used to detect the pressure change in the sealed cavity.

[0030] The simulated welding electron gun movement leakage rate detection device provided by the present invention can simulate the actual movement process of the welding electron gun, and adopts the pressure drop method to detect the leakage rate of the electron gun under complex working conditions such as speed fluctuation, medium pressure fluctuation, and vibration generated by the processed workpiece, so as to study the influence of different speeds, pressures, and compression ratios on the sealing performance of the welding electron gun. Compared with the traditional detection method, it has a wider application range and higher authenticity. The medium sealing assembly 10 is an equivalent model of the movement of the welding electron gun, provides a leakage rate detection device and method for the welding electron gun, and provides repeatable test conditions for it to ensure the accuracy of its measurement; at the same time, the observation window 16 provided on the medium sealing assembly 10 can observe the service state of the sealing ring 12 during the movement of the electron gun in real time, which provides great convenience for timely discovering and solving problems.

[0031] In an embodiment of the present invention, as Figure 5As shown, the groove 15 is annular, and the shape of the groove 15 is adapted to the shape of the sealing ring 12, so that the sealing ring 12 can be tightly embedded therein. The sealing ring 12 is embedded in the groove and partially exposed. This setting has the following effects: on the one hand, the exposed part of the sealing ring 12 can ensure that the sealing ring 12 has a certain elastic space during initial installation, so that when it is subjected to the pressure of the light-transmitting plate 14, it can better adapt to the slight deformation between components, thereby enhancing the sealing effect; on the other hand, when simulating the movement of the welding electron gun, relative sliding will occur between the mounting plate 13 and the groove plate 11. At this time, the sealing ring 12 may tend to move under the action of friction; since the groove 15 limits the root of the sealing ring 12, even if the sealing ring 12 is partially exposed, the embedded part of it in the groove 15 can still be effectively fixed, thus avoiding obvious displacement or distortion of the sealing ring 12 during movement, ensuring the stability of the sealing cavity and the reliability of the sealing performance.

[0032] The bottom plate of the groove plate 11 is provided with a connection hole, and the groove 15 is arranged around the outer periphery of the connection hole. The connection hole is used to connect the first interface of the tee joint 21. The groove plate 11 has a groove-like structure. The two side walls of the groove plate 11 can limit the mounting plate 13 in the width direction, so that the mounting plate 13 and the groove plate 11 can only slide relative to each other along the length direction of the groove plate 11. At least one end of the groove plate 11 is blocked by an end plate, and the end plate is bolted to the groove plate 11 for convenient installation and disassembly of the end plate; of course, the connection method between the end plate and the groove plate 11 is not limited to this, and other connection methods can also be used. Preferably, end plates are provided at both ends of the groove plate 11. One end plate is used for limiting, and the other end plate is used for installing the first support seat 43.

[0033] In an embodiment of the present invention, the mounting plate 13 is in the shape of a cuboid frame. The middle part of the mounting plate 13 is perforated to form a rectangular opening. The existence of the opening enables the light-transmitting plate 14 to be closely attached to the sealing ring 12, and then jointly encloses a sealing cavity with the groove plate 11. During the process of simulating the movement of the welding electron gun, the sealing ring 12 will be dynamically compressed and rubbed. Through the observation window 16, the torsion state of the sealing ring 12 under different speed and pressure conditions can be observed in real time. This design can not only simulate the actual working conditions of the electron gun, but also accurately control and measure the pressure change in the sealing cavity through the pressure regulating component 20 and the leakage rate detecting component 30, so as to study the influence of factors such as speed, pressure and compression rate on the sealing performance.

[0034] In an embodiment of the present invention, as Figure 3 and Figure 4As shown, a first step 17 is provided on the inner side of the side wall of the mounting plate 13. The observation window 16 is connected to the first step 17. The height of the upper surface of the first step 17 is the same as the height of the upper surface of the light-transmitting plate 14. The lower surface of the observation window 16 abuts against the first step 17, and the lower surface of the observation window 16 also abuts against the upper surface of the light-transmitting plate 14. The first step 17 not only provides a stable support for the observation window 16, but also ensures that the upper part of the observation window 16 is in close contact with the light-transmitting plate 14, thus ensuring the sealing performance of the sealing cavity.

[0035] The observation window 16 is connected to the first step 17 by bolts. Of course, the connection method between the observation window 16 and the first step 17 is not limited to this, and other connection methods such as snap connections can also be used. Through the bolt connection, the observation window 16 is fixed on the first step 17, ensuring that the observation window 16 will not be displaced or loosened during the process of simulating the movement of the electron gun for welding, thus ensuring the stability and reliability of the detection process. At the same time, the first step 17 also plays a limiting role, restricting the position of the observation window 16 within the mounting plate 13, ensuring that an appropriate distance and pressure are maintained between the observation window 16 and the light-transmitting plate 14, so that the sealing ring 12 can be evenly attached to the lower surface of the light-transmitting plate 14 when stressed, avoiding sealing failure caused by excessive movement of the observation window 16.

[0036] It should be noted here that the light-transmitting plate 14 is made of glass. Of course, the material of the light-transmitting plate 14 is not limited to this, and other transparent materials can also be used.

[0037] In an embodiment of the present invention, as Figure 4 shown, a second step 18 is provided on the edge of the opening. The edge of the lower surface of the light-transmitting plate 14 abuts against the second step 18, enabling the light-transmitting plate 14 to be accurately positioned during installation and not easily displaced when under pressure. This not only serves to fix the light-transmitting plate 14, but also enables the pressure applied to the light-transmitting plate 14 to be evenly distributed, preventing sealing failure caused by uneven local stress. The middle part of the lower surface of the light-transmitting plate 14 protrudes downward, and the lower surface of the protruding part is in the same plane as the lower surface of the mounting plate 13. The protruding part of the light-transmitting plate 14 can directly contact the sealing ring 12.

[0038] In an embodiment of the present invention, as Figure 3 shown, the medium sealing assembly 10 further includes a pressing plate 19. The pressing plate 19 is in the shape of a strip plate and has sufficient strength and rigidity to ensure that it will not deform when pressure is applied. The pressing plate 19 is connected to the upper part of the side wall of the groove plate 11 and abuts against the mounting plate 13. The pressing plate 19 is used to adjust the pressure applied to the mounting plate 13, and thus change the pressure applied by the light-transmitting plate 14 to the sealing ring 12.

[0039] Specifically, there are two pressing plates 19, and the two pressing plates 19 are arranged at intervals along the length direction of the groove plate 11. Adopting this arrangement helps to apply pressure evenly in the length direction of the mounting plate 13, ensuring that the pressure distribution of the light-transmitting plate 14 applied to the sealing ring 12 is uniform, thereby improving the stability of the sealing ring 12. Of course, the number of the pressing plates 19 is not limited to two. According to the actual working conditions and size requirements, only one pressing plate 19 can also be provided. In this case, in order to ensure the uniform distribution of pressure, the width of the pressing plate 19 needs to be set wider to cover a sufficient area; or, more pressing plates 19 can also be provided to further improve the accuracy and uniformity of pressure adjustment.

[0040] Both ends of the pressing plate 19 are connected to the upper part of the side wall of the groove plate 11 through bolts, and a plurality of gaskets are sleeved on the bolts between the pressing plate 19 and the side wall. By changing the number of gaskets, the pressure applied by the pressing plate 19 on the mounting plate 13 can be finely adjusted. When the number of gaskets increases, the pressure between the pressing plate 19 and the mounting plate 13 decreases accordingly, and vice versa. Adopting this adjustment method can accurately control the pressure applied by the light-transmitting plate 14 to the sealing ring 12, and finally realize the accurate adjustment of the compression ratio of the sealing ring 12.

[0041] In an embodiment of the present invention, the simulated welding electron gun movement leakage rate detection device further includes a driving component 40. The driving component 40 is connected to the groove plate 11 and the mounting plate 13, and the driving component 40 is used to drive the mounting plate 13 to move relative to the groove plate 11. The driving component 40 can be a lead screw component, or a cylinder, an oil cylinder or other linear driving components.

[0042] In an embodiment of the present invention, as Figure 1 shown, the driving component 40 includes a motor 41, a nut seat 42, a first support seat 43 and a lead screw 44. The nut seat 42 is connected to the first end of the mounting plate 13 through bolts, which not only ensures the stability of the nut seat 42, but also facilitates disassembly and maintenance when needed. A end plate is provided at the first end of the groove plate 11, and the end plate is provided with a mounting hole. The first support seat 43 is embedded in the mounting hole, and the first support seat 43 is connected to the end plate through bolts. The central axis of the first support seat 43 and the central axis of the nut seat 42 are on the same straight line to ensure the straightness and stability of the lead screw 44 during rotation, reduce the shaking and deviation during operation, and thus improve the movement accuracy of the entire device. The first end of the lead screw 44 is in threaded cooperation with the nut seat 42 and is rotatably matched with the first support seat 43. The second end of the lead screw 44 is connected to the rotating shaft of the motor 41. The motor 41 is preferably a servo motor to accurately control the rotation speed of the lead screw 44, and further accurately control the moving speed of the groove plate 11; the motor 41 is connected to the base through bolts to realize the fixation of the motor 41.

[0043] Preferably, the driving assembly 40 further includes a second support base. The second support base is bolted to the base and is located between the motor 41 and the first support base 43. The second support base is rotationally engaged with the lead screw 44. The provision of the second support base can provide additional support for the lead screw 44. Especially when the lead screw 44 is relatively long, it can effectively prevent the lead screw 44 from bending or vibrating during high-speed rotation or long-term operation, thereby further improving the stability and service life of the entire device.

[0044] During operation, the motor 41 drives the lead screw 44 to rotate. The lead screw 44 drives the mounting plate 13 to move through the nut seat 42, causing the glass to slide relative to the sealing ring 12. By adjusting the rotation speed of the motor 41, the movement speed of the medium sealing assembly 10 is changed to simulate the speed fluctuation of the welding electron gun under actual working conditions.

[0045] In one embodiment of the present invention, as Figure 6 shown, the bottom plate of the groove plate 11 is provided with a three-way interface 21. The first interface of the three-way interface 21 is communicated with the sealing cavity through a connecting hole. The pressure regulating assembly 20 is used to provide an initial pressure for the sealing cavity. The pressure regulating assembly 20 includes an air pump 22 and an intake pipe 23. The air pump 22 is used to provide the source power for the entire device. One end of the intake pipe 23 is communicated with the outlet of the air pump 22, and the other end of the intake pipe 23 is communicated with the second interface of the three-way interface 21. A pressure regulating valve 24 is connected in series on the intake pipe 23. The setting of the pressure regulating valve 24 enables the operator to flexibly adjust the conveying pressure of the gas medium in a short time, so that the pressure in the sealing cavity can quickly reach the predetermined pressure value, which can truly simulate the medium pressure fluctuation faced by the welding electron gun during actual operation, because it can accurately simulate the working environment of the electron gun under different pressure conditions, and thus provides strong support for studying the influence of pressure factors on the sealing performance of the electron gun.

[0046] In one embodiment of the present invention, the leakage rate detection assembly 30 is used to accurately measure the leakage of the medium in the sealing cavity, so as to evaluate the sealing performance of the welding electron gun during the simulated movement process. The leakage rate detection assembly 30 includes a pressure sensor 31. The air inlet of the pressure sensor 31 is communicated with the third interface of the three-way interface 21 through a connecting pipe 32. Preferably, the connecting pipe 32 is communicated with the air inlet of the pressure sensor 31 through a connector. The pressure sensor 31 is used to detect the leakage rate of the medium leaking from the sealing cavity. The pressure sensor 31 can accurately detect the minute changes in the pressure in the sealing cavity. When the gas in the sealing cavity leaks, the pressure sensor 31 can convert the minute changes in the sealing cavity into corresponding electrical signals for output.

[0047] In one embodiment of the present invention, as Figure 1As shown, the leakage rate detection device further includes a data acquisition component 50. The data acquisition component 50 is electrically connected to the pressure sensor 31 and is used to collect and save the pressure values detected by the pressure sensor 31. The data acquisition component 50 includes a computer. The computer can not only receive signals from the pressure sensor 31, but also run specialized data processing software to analyze, store, and display the collected pressure data, enabling the operator to intuitively view the change curve of pressure over time, which is convenient for accurately calculating and evaluating the leakage rate. Of course, the specific type of the data acquisition component 50 is not limited to this, and it can also be a combination of a display and a controller.

[0048] In the actual detection process, the pressure regulating component 20 provides an initial pressure inside the sealing cavity. The pressure regulating valve 24 can adjust the conveying pressure of the gas medium in a short time, enabling the pressure in the sealing cavity to quickly reach a predetermined value, and can achieve pressure increase and decrease as needed to simulate the pressure fluctuation of the medium in the actual working process. After the pressure in the sealing cavity stabilizes at the predetermined value, the data acquisition component 50 is used to obtain the change value of pressure over time in real time, and the corresponding leakage rate value can be calculated according to the following formula (1).

[0049] The present invention also provides a method for detecting the leakage rate of a simulated welding electron gun movement. The detection method is based on the simulated welding electron gun movement leakage rate detection device described in any one of the above embodiments. The leakage rate detection method includes: Step S100, input a gas medium into the sealing cavity through the pressure regulating component 20 and adjust the pressure in the sealing cavity; Specifically, step S100 specifically includes the following steps: Open the valve of the air pump 22 to allow the gas medium to flow into the sealing cavity through the intake pipe 23; Open the pressure regulating valve 24 to reduce the pressure of the gas medium and ensure the stability of the pressure in the sealing cavity.

[0050] Furthermore, before performing step S100, the leakage rate detection method further includes: Install the sealing ring 12 in the groove 15 of the groove plate 11, install the mounting plate 13 inside the groove plate 11, cover the light-transmitting plate 14 on the opening, and make the light-transmitting plate 14 press the sealing ring 12, and connect the pressing plate 19 to the upper part of the side wall of the groove plate 11 with bolts; Fix the nut seat 42 on the outside of the first end of the mounting plate 13, fix the two end plates to both ends of the groove plate 11 with bolts, embed the first support seat 43 in the mounting hole of the end plate, and connect the first support seat 43 to the end plate with bolts; thread the first end of the lead screw 44 with the nut seat 42, the lead screw 44 is rotationally matched with the first support seat 43, and the second end of the lead screw 44 is connected to the rotating shaft of the motor 41; Connect the first interface of the three-way interface 21 to the sealing cavity through the connection hole, connect one end of the intake pipe 23 to the outlet of the air pump 22, connect the other end of the intake pipe 23 to the second interface of the three-way interface 21, and connect the pressure regulating valve 24 in series on the intake pipe 23; connect the intake port of the pressure sensor 31 to the third interface of the three-way interface 21 through the connecting pipe 32; Connect the connecting wire of the pressure sensor 31 to the computer.

[0051] Step S200, drive the mounting plate 13 to slide relative to the groove plate 11 through the driving assembly 40 to simulate the movement state of the electron gun under actual working conditions; Specifically, supply power to the motor 41, the motor 41 drives the lead screw 44 to rotate, the lead screw 44 drives the mounting plate 13 to move through the nut seat 42, so that the glass slides relative to the sealing ring 12; change the rotation speed of the motor 41 to change the movement speed of the medium sealing assembly 10 to simulate the movement state of the welding electron gun under actual working conditions, and realize the leakage rate measurement of the sealing device at different speeds.

[0052] Further, after executing step S200, the leakage rate detection method further includes: turn on the data acquisition component 50 to ensure the normal operation of the pressure sensor 31.

[0053] Step S300, adjust the pressure in the sealing cavity to a predetermined pressure value through the pressure regulating component, and record the initial pressure value P1.

[0054] Step S400, record the pressure value P2 in the sealing cavity that changes with time t.

[0055] Step S500, calculate the leakage rate according to the following formula (1) , (1) Among them, represents the moving speed of the groove plate.

[0056] Step S600, change the pressure applied by the pressing plate 19 to the mounting plate 13, and calculate the leakage rate corresponding to different compression ratios.

[0057] Specifically, a plurality of gaskets are sleeved on the bolts between the pressing plate 19 and the side wall. By changing the number of gaskets, the pressure applied by the pressing plate 19 on the mounting plate 13 can be finely adjusted to realize the leakage rate detection of the sealing ring 12 at different compression ratios.

[0058] Further, after executing step S600, the leakage rate detection method further includes: Observe the torsion degree of the sealing ring 12 during the reciprocating movement of the medium sealing assembly 10, and record the torsion state at different speeds and pressures.

[0059] Further, after performing step S600, the leakage rate detection method further includes: Turn off the power supply of the motor 41 to stop the movement of the medium sealing assembly 10; After the pressure reaches a stable state, first close the pressure regulating assembly 20, and then exhaust all the high-pressure gas in the sealing cavity to end the experiment.

[0060] The simulated welding electron gun movement leakage rate detection device provided by the present invention is used to measure the leakage rate of the welding electron gun and evaluate the sealing performance, so as to predict the service life of the sealing ring 12 and ensure the welding accuracy of the workpiece.

[0061] The simulated welding electron gun movement leakage rate detection device provided by the present invention can simulate the movement process of the welding electron gun, detect the leakage rate of the sealing ring 12 under different compression ratios and different pressures and speeds of the welding electron gun, so as to solve the problem that it is difficult to predict the sealing performance of the welding electron gun; at the same time, it also has repeatable test conditions to ensure the accuracy and reliability of the test results, and provides strong support for the optimized design and practical application of the welding electron gun.

[0062] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A leakage rate detection device for simulating the movement of a welding electron gun, characterized in that, Comprising: A medium sealing assembly (10), the medium sealing assembly (10) comprising: A groove plate (11), a bottom plate of the groove plate (11) being provided with a groove (15), a sealing ring (12) being arranged in the groove (15); A mounting plate (13), the mounting plate (13) being slidably arranged inside the groove plate (11), a bottom of the mounting plate (13) being provided with an opening; A light-transmitting plate (14), covering the opening and fitting with the sealing ring (12); the light-transmitting plate (14), the sealing ring (12) and the groove plate (11) cooperate to enclose a sealing cavity; An observation window (16), the observation window (16) being arranged in the mounting plate (13) and abutting against an upper part of the light-transmitting plate (14); A pressure regulating assembly (20), communicating with the sealing cavity, the pressure regulating assembly (20) being used for controlling the pressure in the sealing cavity; A leakage rate detection assembly (30), communicating with the sealing cavity, the leakage rate detection assembly (30) being used for detecting a pressure change in the sealing cavity.

2. The simulated welding electron gun movement leakage rate detection device according to claim 1, characterized in that A first step (17) is arranged on an inner side of a side wall of the mounting plate (13), and the observation window (16) is connected to the first step (17).

3. The leakage rate detection device for simulating the movement of a welding electron gun according to claim 1, characterized in that, A second step (18) is arranged at an edge of the opening, and an edge of a lower surface of the light-transmitting plate (14) abuts against the second step (18).

4. The simulated welding electron gun movement leakage rate detection device according to any one of claims 1 to 3, characterized in that, The medium sealing assembly (10) further comprises: A pressing plate (19), connected to an upper part of a side wall of the groove plate (11) and abutting against the mounting plate (13), the pressing plate (19) being used for adjusting the pressure applied to the mounting plate (13), thereby changing the pressure applied by the light-transmitting plate (14) to the sealing ring (12).

5. The simulated welding electron gun movement leakage rate detection device according to any one of claims 1 to 3, characterized in that, Further comprising: A driving assembly (40), connected to the groove plate (11) and the mounting plate (13), the driving assembly (40) being used for driving the mounting plate (13) to move relative to the groove plate (11).

6. The simulated welding electron gun movement leakage rate detection device according to claim 5, characterized in that, The driving assembly (40) comprises: A motor (41); A nut seat (42), the nut seat (42) being connected to a first end of the mounting plate (13); A first support seat (43), the first support seat (43) being connected to a first end of the groove plate (11) through an end plate; A lead screw (44), a first end of the lead screw (44) being in threaded cooperation with the nut seat (42) and in rotational cooperation with the first support seat (43), a second end of the lead screw (44) being connected to a rotating shaft of the motor (41).

7. The simulated welding electron gun movement leakage rate detection device according to any one of claims 1 to 3, characterized in that, A three-way interface (21) is arranged on a bottom plate of the groove plate (11), a first interface of the three-way interface (21) communicating with the sealing cavity; The pressure regulating assembly (20) comprises: An air pump (22); An intake pipe (23), one end of the intake pipe (23) being communicated with an outlet of the air pump (22), the other end of the intake pipe (23) being communicated with a second interface of the three-way interface (21); a pressure regulating valve (24) is connected in series on the intake pipe (23).

8. The simulated welding electron gun movement leakage rate detection device according to claim 7, characterized in that The leakage rate detection assembly (30) comprises: A pressure sensor (31), an air inlet of the pressure sensor (31) is communicated with a third interface of the three-way interface (21) through a connecting pipe (32).

9. The simulated welding electron gun movement leakage rate detection device according to claim 8, characterized in that, The leakage rate detection device further includes: A data acquisition component (50), the data acquisition component (50) is electrically connected to the pressure sensor (31), and the data acquisition component (50) is used for acquiring and storing the pressure value detected by the pressure sensor (31).

10. A method for detecting the leakage rate of a simulated welding electron gun during movement, the detection method being based on the simulated welding electron gun movement leakage rate detection device according to any one of claims 1 to 9, characterized in that, Including: Inputting a gas medium into the sealing cavity through the pressure regulating component (20) and regulating the pressure in the sealing cavity; Driving the mounting plate (13) to slide relative to the groove plate (11) through the driving component (40) to simulate the motion state under the actual working conditions of the electron gun; Regulating the pressure in the sealing cavity to a predetermined pressure value through the pressure regulating component (20) and recording the initial pressure value P1; Recording the pressure value P2 in the sealing cavity that changes with time t; Calculate the leakage rate according to the following formula (1) , （1） Among them, represents the moving speed of the groove plate (11); Changing the pressure applied to the mounting plate (13) by the pressing plate (19) and calculating the leakage rate corresponding to different compression ratios.

Images