Vacuum cavity automatic air supplement method, system, device and storage medium

Abstract

The application discloses a kind of vacuum cavity automatic air supply method, system, equipment and storage medium, belong to automation field.The air supply system of the application vacuum cavity includes vacuum cavity and air pipe, first solenoid valve and second solenoid valve are equipped on the air pipe, when the air pressure inside the vacuum cavity is less than first air pressure threshold, gas is controlled from the air pipe into the vacuum cavity by first solenoid valve, until the air pressure inside the vacuum cavity reaches the first air pressure threshold, air supply is carried out by the second electromagnetic threshold and the first solenoid valve simultaneously;When the air pressure inside the vacuum cavity reaches second air pressure threshold, the second solenoid valve is closed, air supply is continued by first solenoid valve, until the air pressure inside the vacuum cavity reaches standard atmospheric pressure, the first solenoid valve is closed, can guarantee working efficiency while avoiding adverse effects on the welding of workpiece, and can reduce cavity resonance, finally smooth opening warehouse.

Description

Technical Field

[0001] This application relates to the field of automation technology, and in particular to an automatic gas replenishment method, system, device and storage medium for a vacuum chamber. Background Technology

[0002] Currently, using a vacuum welding system to weld workpieces can effectively prevent the adverse effects of air bubbles on the workpieces. Specifically, in order to eliminate air bubbles in the welding material, the welding material needs to be heated and melted first, the workpiece is placed in a vacuum chamber, and the air in the vacuum chamber is extracted.

[0003] However, after the air is extracted, the vacuum chamber is under negative pressure and needs to be replenished with gas to restore the pressure inside the vacuum chamber to normal atmospheric pressure. However, since the welding material inside the vacuum chamber is in a molten state, if too much gas is added during the replenishment process to ensure the workpiece processing efficiency, the liquid welding material may splash due to the low pressure, which will have an adverse effect on the welding of the workpiece. Summary of the Invention

[0004] The main objective of this application is to provide an automatic gas replenishment method, system, device, and storage medium for a vacuum chamber, aiming to solve the technical problem that if the gas pressure is too high during the gas replenishment process, liquid welding material may easily splash, causing adverse effects on the welding of the workpiece.

[0005] To achieve the above objectives, this application provides an automatic vacuum chamber gas replenishment method, applied to a vacuum chamber gas replenishment system. The vacuum chamber gas replenishment system includes a vacuum chamber and a vent pipe. The vent pipe is equipped with a first solenoid valve and a second solenoid valve. The automatic vacuum chamber gas replenishment method includes the following steps:

[0006] When the gas pressure inside the vacuum chamber is less than the first gas pressure threshold, gas is controlled by the first solenoid valve to enter the vacuum chamber from the vent pipe until the gas pressure inside the vacuum chamber reaches the first gas pressure threshold. Then, gas is replenished simultaneously by the second solenoid valve and the first solenoid valve.

[0007] When the air pressure inside the vacuum chamber reaches the second air pressure threshold, the second solenoid valve is closed, and air is replenished through the first solenoid valve until the air pressure inside the vacuum chamber reaches the standard atmospheric pressure, at which point the first solenoid valve is closed.

[0008] Optionally, the first pressure threshold is 200 mbar, and the second pressure threshold is 800 mbar.

[0009] Optionally, the step of controlling gas to enter the vacuum chamber from the vent pipe through the first solenoid valve until the gas pressure inside the vacuum chamber reaches the first gas pressure threshold, and then simultaneously replenishing gas through the second solenoid valve and the first solenoid valve, includes:

[0010] The first solenoid valve controls the gas to enter the vacuum chamber from the vent pipe based on a preset first speed. When the gas pressure inside the vacuum chamber reaches the first gas pressure threshold, the second solenoid valve and the first solenoid valve simultaneously replenish the gas.

[0011] The preset first speed is determined based on the number and size of the weld points on the welded workpiece and the air pressure inside the vacuum chamber.

[0012] Optionally, before the step of simultaneously replenishing air through the second electromagnetic threshold and the first electromagnetic valve, the method further includes:

[0013] The second gas replenishment rate is determined based on the current gas pressure inside the vacuum chamber, the first gas replenishment rate, and the standard atmospheric pressure.

[0014] Based on the second gas replenishment rate, the current gas pressure in the vacuum chamber is adjusted by the second solenoid valve.

[0015] Optionally, the vacuum chamber is further provided with a workpiece conveyor belt, and before the step of controlling the gas to enter the vacuum chamber from the vent pipe via the first solenoid valve, the method further includes:

[0016] The solder joints on the workpiece are heated by a heater to melt the solder joints, wherein the composition of the soldering material of the solder joints includes tin;

[0017] After heating is completed, the heated workpiece is conveyed into the vacuum chamber via the workpiece conveyor belt.

[0018] The gas inside the vacuum chamber containing the heated workpiece is extracted using a vacuum pump until the pressure reaches 20-100 mbar, at which point the vacuum pump is turned off.

[0019] Optionally, the automatic air replenishment system for the vacuum chamber further includes a guide vane, which is disposed between the air vent and the workpiece conveyor belt to buffer the impact of the gas introduced into the vacuum chamber from the air vent on the heated workpiece.

[0020] Optionally, the air guide plate is a flat plate.

[0021] Furthermore, to achieve the above objectives, this application also provides an automatic vacuum chamber gas replenishment system, which includes a vacuum chamber, a vent pipe, and an automatic vacuum chamber gas replenishment device. The vent pipe is equipped with a first solenoid valve and a second solenoid valve, and the automatic vacuum chamber gas replenishment device includes:

[0022] The first gas replenishment module is used to control gas to enter the vacuum chamber from the vent pipe through the first solenoid valve when the gas pressure inside the vacuum chamber is less than the first gas pressure threshold, until the gas pressure inside the vacuum chamber reaches the first gas pressure threshold, and then replenish gas simultaneously through the second solenoid valve and the first solenoid valve.

[0023] The first gas replenishment module is used to close the second solenoid valve and continue to replenish gas through the first solenoid valve when the gas pressure inside the vacuum chamber reaches the second gas pressure threshold, until the gas pressure inside the vacuum chamber reaches the standard atmospheric pressure, and then close the first solenoid valve.

[0024] In addition, to achieve the above objectives, this application also provides an apparatus comprising: a memory, a processor, and an automatic vacuum chamber gas replenishment program stored in the memory and executable on the processor, the automatic vacuum chamber gas replenishment program being configured to implement the steps of the automatic vacuum chamber gas replenishment method as described above.

[0025] In addition, to achieve the above objectives, this application also provides a computer-readable storage medium storing an automatic vacuum chamber gas replenishment program, which, when executed by a processor, implements the steps of the automatic vacuum chamber gas replenishment method described above.

[0026] This application relates to a vacuum chamber gas replenishment system, which includes a vacuum chamber and a vent pipe. The vent pipe is equipped with a first solenoid valve and a second solenoid valve. When the gas pressure inside the vacuum chamber is less than a first pressure threshold, the first solenoid valve controls gas to enter the vacuum chamber from the vent pipe until the gas pressure inside the vacuum chamber reaches the first pressure threshold. Then, the second solenoid valve and the first solenoid valve simultaneously replenish gas. When the gas pressure inside the vacuum chamber reaches a second pressure threshold, the second solenoid valve is closed, and gas replenishment continues through the first solenoid valve until the gas pressure inside the vacuum chamber reaches a second pressure threshold. At standard atmospheric pressure, the first solenoid valve is closed. Since the pressure change in the vacuum chamber is slow when the first solenoid valve initially controls the gas to enter the vacuum chamber from the vent pipe, the liquid welding material will not splash due to excessive air intake and low pressure. When the pressure inside the vacuum chamber reaches the first pressure threshold, the second solenoid valve and the first solenoid valve simultaneously replenish the gas until the pressure inside the vacuum chamber reaches standard atmospheric pressure. Then the first solenoid valve is closed. This ensures work efficiency while avoiding adverse effects on the welding of the workpiece, and also reduces cavity resonance, ultimately resulting in a smooth opening of the chamber. Attached Figure Description

[0027] Figure 1 This is a flowchart illustrating the first embodiment of the automatic gas replenishment method for the vacuum cavity of this application;

[0028] Figure 2 This is a first structural schematic diagram of the vacuum cavity gas replenishment system of the automatic vacuum cavity gas replenishment method of this application;

[0029] Figure 3 This is a schematic diagram of the second structure of the vacuum cavity gas replenishment system in the automatic vacuum cavity gas replenishment method of this application;

[0030] Figure 4 This is a flowchart illustrating the second embodiment of the automatic gas replenishment method for the vacuum cavity in this application;

[0031] Figure 5 This is a structural block diagram of an embodiment of the automatic vacuum chamber gas replenishment system of this application;

[0032] Figure 6 This is a schematic diagram of the device structure of the hardware operating environment involved in the embodiments of this application.

[0033] Appendix Figure 2 and attached Figure 3 Label Explanation:

[0034] label name label name 1 First solenoid valve 5 Second motor 2 Second solenoid valve 6 proportional valve 3 vacuum pump 7 air guide plate 4 First motor

[0035] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0036] It should be understood that the specific embodiments described herein are merely illustrative of this application and are not intended to limit this application.

[0037] Reference Figure 1 , Figure 1 This is a flowchart illustrating the first embodiment of the automatic gas replenishment method for the vacuum cavity in this application.

[0038] In the first embodiment, the automatic gas replenishment method for the vacuum chamber includes the following steps:

[0039] S10: When the gas pressure inside the vacuum chamber is less than the first gas pressure threshold, gas is controlled to enter the vacuum chamber from the vent pipe through the first solenoid valve until the gas pressure inside the vacuum chamber reaches the first gas pressure threshold. Then, gas is replenished simultaneously through the second solenoid valve and the first solenoid valve.

[0040] It should be noted that the execution subject of the method in this embodiment is the vacuum chamber gas replenishment device in the vacuum chamber gas replenishment system, such as... Figure 2 and Figure 3 As shown, the vacuum chamber gas replenishment system includes a vacuum chamber and a vent pipe, and the vent pipe is equipped with a first solenoid valve 1 and a second solenoid valve 2.

[0041] In this embodiment, in order to eliminate air bubbles in the welding material, the welding material needs to be heated and melted first, the workpiece is placed in the vacuum chamber, and the air in the vacuum chamber is extracted. However, after the air is extracted, the vacuum chamber is in a negative pressure state, and gas needs to be added to restore the air pressure in the vacuum chamber to the normal atmospheric pressure state.

[0042] It should be noted that the vacuum chamber gas replenishment system is part of the vacuum welding system. Because the workpieces being processed vary in size, the vacuum chamber is typically designed to be much larger than the workpiece size to accommodate different workpieces. Therefore, to ensure the efficiency of the entire vacuum welding process during gas replenishment, rapid and automatic gas replenishment is necessary. However, since the welding material inside the vacuum chamber is in a molten state, if the amount of gas added during replenishment is too large to ensure workpiece processing efficiency, the low gas pressure can easily cause the molten welding material to splatter, adversely affecting the welding of the workpiece.

[0043] However, considering that continuously replenishing gas with a small amount would reduce workpiece processing efficiency due to the large volume of the vacuum chamber, this embodiment adopts a segmented gas replenishment strategy to ensure workpiece processing efficiency while preventing splashing of liquid welding material due to excessive gas replenishment at low pressure.

[0044] It should also be noted that a workpiece conveyor belt is provided inside the vacuum chamber. Before the step of controlling the gas to enter the vacuum chamber from the vent pipe through the first solenoid valve 1, the weld points on the workpiece can be heated by a heater to melt the weld points. After heating, the heated workpiece is conveyed to the vacuum chamber by the workpiece conveyor belt. The vacuum pump 3 extracts the gas inside the vacuum chamber containing the heated workpiece until it reaches 20-100 mbar (generally, the vacuum range required by the user's product process is 20-100 mbar), and then the vacuum pump 3 is turned off.

[0045] Specifically, the soldering material of the solder joint may include components such as tin or lead. If the vacuum soldering system is used for PCBA (Printed Circuit Board Assembly), the soldering material of the solder joint is usually solder paste, and the component of the soldering material is tin.

[0046] To remove air bubbles from the solder paste, when the solder joints on the workpiece are heated by the heater, the solder paste will melt and become liquid. After heating, the heated workpiece is conveyed to the vacuum chamber by the workpiece conveyor belt. The vacuum pump 3 extracts the gas inside the vacuum chamber containing the heated workpiece until the gas pressure inside the vacuum chamber reaches 20-100 mbar, at which point the air bubbles in the solder joint can be extracted.

[0047] Specifically, the air pressure inside the vacuum chamber can be obtained by a pressure sensor, which is located inside the vacuum chamber or inside the vent pipe.

[0048] Specifically, such as Figure 2 and Figure 3 As shown, the vacuum chamber gas replenishment system also includes a first motor 4, a second motor 5, and a proportional valve 6.

[0049] The first motor 4 is used to close the vacuum chamber after the heated workpiece has been transferred into the vacuum chamber, thus sealing the vacuum chamber. Specifically, the vacuum chamber includes an upper cover and a lower chamber. After the sensor detects that the workpiece has entered the chamber, the upper cover closes downwards, placing the workpiece in an independent sealed space. After vacuuming, the upper cover cannot be opened under negative pressure, so it is necessary to replenish the air to restore the normal atmospheric pressure inside the chamber before the upper cover can be opened and the workpiece can be transferred out.

[0050] The proportional valve 6 is used to extract the gas inside the vacuum chamber where the heated workpiece is placed by the vacuum pump 3 until the gas pressure inside the vacuum chamber reaches 20-100 mbar and then closes the suction port of the vacuum pump 3.

[0051] In this embodiment, if the air pressure is less than the first air pressure threshold or reaches 20-100 mbar, the pumping can be stopped. Specifically, the 20-100 mbar is less than the first air pressure threshold.

[0052] When the air pressure inside the vacuum chamber is less than the first air pressure threshold, the vacuum chamber is under negative pressure. If the air pressure is not restored to atmospheric pressure, the workpiece will be affected by the pressure difference between the inside and outside of the vacuum chamber when the workpiece is being transported.

[0053] Specifically, during the gas replenishment process, the first solenoid valve 1 can control the gas to enter the vacuum chamber from the vent pipe based on a preset first speed until the gas pressure inside the vacuum chamber reaches a first gas pressure threshold, wherein the first gas pressure threshold is 200 mbar.

[0054] The implementation method of controlling the gas from the vent pipe to enter the vacuum chamber based on a preset first speed through the first solenoid valve 1 can be as follows: the user replenishes the gas through a gas replenishment tool, the gas passes through a flow meter to the solenoid valve 1, and the flow meter controls the gas flow through the solenoid valve 1, thereby adjusting the gas entry speed inside the vacuum chamber. Specifically, the gas can be compressed air or nitrogen, etc.

[0055] Specifically, considering the number and size of weld points on different workpieces, and the differences in size, the preset first speed is determined based on the number and size of weld points on the welded workpieces and the air pressure inside the vacuum chamber.

[0056] Considering that different welding materials have different gas impact resistance in liquid state, and the density of different gases added is different, the preset first speed can also be determined based on the gas impact resistance that the welding material can withstand in liquid state, the density of the gas, the number and size of the weld points of the welded workpiece, and the position of the vent pipe in the vacuum chamber when the gas pressure is less than the first gas pressure threshold.

[0057] Specifically, the preset first speed V1 can be calculated based on the following formula:

[0058]

[0059] Wherein, F is the gas impact resistance that the welding material can withstand in a liquid state under the corresponding gas pressure, ρ is the gas density, A is the area of ​​the weld joint (the size of the weld joint), n is the number of weld joints, and K... d The distance coefficient between the vent outlet of the vent pipe and the weld point.

[0060] Specifically, the area of ​​the weld joint can be predetermined, and the distance coefficient of the weld joint can be determined based on the positions of the vent pipe and the workpiece conveyor belt within the vacuum chamber. The greater the distance between the vent pipe and the workpiece conveyor belt, the higher the K value. d The larger the value of K, the closer the vent pipe is to the workpiece conveyor belt, and the greater the value of K. d The smaller.

[0061] Specifically, the Where P is the air pressure inside the vacuum chamber, A is the area of ​​the weld joint, and T is the temperature of the surface of the welding material.

[0062] By controlling the gas through the first solenoid valve 1 to flow into the vacuum chamber from the vent pipe at the preset first speed determined above, it is possible to avoid the splashing of liquid welding material caused by excessive air intake when the air pressure is low, thus avoiding adverse effects on the welding of the workpiece. The air pressure inside the vacuum chamber stabilizes when it reaches the first air pressure threshold.

[0063] Since the second solenoid valve 2 replenishes gas simultaneously with the first solenoid valve based on the second replenishment speed, the gas volume entering the vacuum chamber from the vent pipe can be adjusted by the second replenishment speed. Furthermore, the preset second speed plus the preset first speed is greater than the preset first speed. Therefore, while ensuring the workpiece processing efficiency, the preset first speed can be kept away from being too large and causing an impact on the liquid welding material.

[0064] S20: When the air pressure inside the vacuum chamber reaches the second air pressure threshold, close the second solenoid valve and continue to replenish air through the first solenoid valve until the air pressure inside the vacuum chamber reaches the standard atmospheric pressure, then close the first solenoid valve.

[0065] In order to ensure workpiece processing efficiency while preventing the liquid welding material from splashing due to excessive gas replenishment at low pressure, this embodiment also closes the second solenoid valve when the gas pressure inside the vacuum chamber reaches the second gas pressure threshold. The first solenoid valve 2 controls the gas to continue to flow into the vacuum chamber from the vent pipe based on the first gas replenishment rate until the atmospheric pressure inside the vacuum chamber reaches the standard atmospheric pressure, at which point the first solenoid valve 1 is closed.

[0066] Specifically, the second air pressure threshold is 800 mbar.

[0067] The second motor 5 is used to open the top cover of the vacuum chamber when the atmospheric pressure inside the vacuum chamber reaches the standard atmospheric pressure, thereby smoothly conveying the workpiece out of the vacuum chamber from the workpiece conveyor belt. That is, when the vacuum chamber is in a low-pressure state, the pressure of the vacuum chamber is quickly restored to normal atmospheric pressure without affecting the welding quality, and the workpiece is conveyed out.

[0068] In this embodiment, the vacuum chamber gas replenishment system includes a vacuum chamber and a vent pipe. The vent pipe is equipped with a first solenoid valve and a second solenoid valve. When the gas pressure inside the vacuum chamber is less than a first pressure threshold, the first solenoid valve controls gas to enter the vacuum chamber from the vent pipe until the gas pressure inside the vacuum chamber reaches the first pressure threshold. Then, the second solenoid valve and the first solenoid valve simultaneously replenish gas. When the gas pressure inside the vacuum chamber reaches a second pressure threshold, the second solenoid valve is closed, and gas replenishment continues through the first solenoid valve until the gas pressure inside the vacuum chamber reaches standard atmospheric pressure. When the first solenoid valve is closed, the pressure change in the vacuum chamber is slow at the beginning because the gas is controlled by the first solenoid valve to enter the vacuum chamber from the vent pipe. This prevents the liquid welding material from splashing due to excessive air intake and low pressure. When the pressure inside the vacuum chamber reaches the first pressure threshold, the second solenoid valve and the first solenoid valve simultaneously replenish the gas until the pressure inside the vacuum chamber reaches the standard atmospheric pressure. Then, the first solenoid valve is closed. This ensures work efficiency while avoiding adverse effects on the welding of the workpiece, and also reduces cavity resonance, ultimately resulting in a smooth opening of the chamber.

[0069] like Figure 4 As shown, based on the first embodiment, a second embodiment of the automatic vacuum chamber gas replenishment method of this application is proposed. In this embodiment, before the step of simultaneously replenishing gas through the second electromagnetic threshold and the first electromagnetic valve, the method further includes:

[0070] D1: Determine the second gas replenishment rate based on the current gas pressure inside the vacuum chamber, the first gas replenishment rate, and the standard atmospheric pressure;

[0071] D2: Based on the second gas replenishment speed, adjust the current gas pressure in the vacuum chamber through the second solenoid valve 2.

[0072] Specifically, the second gas replenishment rate is determined based on the current gas pressure inside the vacuum chamber, the first gas replenishment rate, and the standard atmospheric pressure. The calculation formula can be:

[0073]

[0074] Wherein, B is the standard atmospheric pressure, and B1 is the current air pressure inside the vacuum chamber.

[0075] The second solenoid valve 2 can adjust the current air pressure in the vacuum chamber based on the second air replenishment speed calculated above. Since the air pressure in the vacuum chamber has not yet returned to standard atmospheric pressure, the sum of the first and second air replenishment speeds is less than a preset speed threshold during the air replenishment process to avoid adverse effects on the workpiece.

[0076] In this embodiment, as Figure 3 As shown, the automatic air replenishment system for the vacuum chamber also includes a guide plate, which is located between the air pipe and the workpiece conveyor belt to buffer the impact of the gas introduced into the vacuum chamber from the air pipe on the heated workpiece.

[0077] Specifically, the air guide plate can also be a flat plate, which can not only block the wind but also increase the air replenishment speed.

[0078] Specifically, if a wind deflector is provided, the preset first speed and preset second speed need to be multiplied by a preset wind deflection coefficient, which is greater than 1.

[0079] In this embodiment, the current air pressure in the vacuum chamber can be adjusted by using the second solenoid valve 2 based on the second air supply rate calculated above. This achieves the goal of ensuring work efficiency while avoiding adverse effects on the welding of the workpiece.

[0080] Furthermore, this application also proposes an automatic vacuum chamber gas replenishment system, which includes a vacuum chamber, a vent pipe, and an automatic vacuum chamber gas replenishment device. The vent pipe is equipped with a first solenoid valve and a second solenoid valve, such as... Figure 5 As shown, the automatic gas replenishment device for the vacuum chamber includes:

[0081] The first gas replenishment module 10 is used to control gas to enter the vacuum chamber from the vent pipe through the first solenoid valve when the gas pressure inside the vacuum chamber is less than the first gas pressure threshold, until the gas pressure inside the vacuum chamber reaches the first gas pressure threshold, and then replenish gas simultaneously through the second solenoid valve and the first solenoid valve.

[0082] The second gas replenishment module 20 is used to close the second solenoid valve and continue to replenish gas through the first solenoid valve when the gas pressure inside the vacuum chamber reaches the second gas pressure threshold until the gas pressure inside the vacuum chamber reaches the standard atmospheric pressure, and then close the first solenoid valve.

[0083] The vacuum chamber gas replenishment system described in this embodiment includes a vacuum chamber and a vent pipe. The vent pipe is equipped with a first solenoid valve and a second solenoid valve. When the gas pressure inside the vacuum chamber is less than a first pressure threshold, the first solenoid valve controls gas to enter the vacuum chamber through the vent pipe until the gas pressure inside the vacuum chamber reaches the first pressure threshold. Then, the second solenoid valve and the first solenoid valve simultaneously replenish gas. When the gas pressure inside the vacuum chamber reaches a second pressure threshold, the second solenoid valve is closed, and gas replenishment continues through the first solenoid valve until the gas pressure inside the vacuum chamber reaches standard atmospheric pressure. The first solenoid valve is closed. Since the gas pressure in the vacuum chamber changes slowly when the first solenoid valve initially controls the gas to enter the vacuum chamber from the vent pipe, the liquid welding material will not splash due to excessive air intake and low gas pressure. When the gas pressure inside the vacuum chamber reaches the first gas pressure threshold, the second solenoid valve and the first solenoid valve simultaneously replenish the gas until the gas pressure inside the vacuum chamber reaches the standard atmospheric pressure. The first solenoid valve is then closed. This ensures work efficiency while avoiding adverse effects on the welding of the workpiece, and also reduces cavity resonance, ultimately resulting in a smooth opening of the chamber.

[0084] It should be noted that each module in the above system can be used to implement each step in the above method and achieve the corresponding technical effect. This embodiment will not elaborate further here.

[0085] Reference Figure 6 , Figure 6 This is a schematic diagram of the hardware operating environment of the device involved in the embodiments of this application.

[0086] like Figure 6 As shown, the device may include: a processor 1001, such as a CPU; a communication bus 1002; a user interface 1003; a network interface 1004; and a memory 1005. The communication bus 1002 is used to enable communication between these components. The user interface 1003 may include a display screen or an input unit such as a keyboard; optionally, the user interface 1003 may also include a standard wired interface or a wireless interface. The network interface 1004 may optionally include a standard wired interface or a wireless interface (such as a Wi-Fi interface). The memory 1005 may be high-speed RAM or non-volatile memory, such as a disk drive. Optionally, the memory 1005 may also be a storage system independent of the aforementioned processor 1001.

[0087] Those skilled in the art will understand that Figure 6 The structure shown does not constitute a limitation on the device and may include more or fewer components than shown, or combine certain components, or have different component arrangements.

[0088] like Figure 6 As shown, the memory 1005, which serves as a computer storage medium, may include an operating system, a network communication module, a user interface module, and an automatic vacuum chamber replenishment program.

[0089] exist Figure 6 In the device shown, the network interface 1004 is mainly used for data communication with an external network; the user interface 1003 is mainly used for receiving user input commands; the device calls the automatic vacuum chamber gas replenishment program stored in the memory 1005 through the processor 1001 and performs the following operations:

[0090] When the gas pressure inside the vacuum chamber is less than the first gas pressure threshold, gas is controlled by the first solenoid valve to enter the vacuum chamber from the vent pipe until the gas pressure inside the vacuum chamber reaches the first gas pressure threshold. Then, gas is replenished simultaneously by the second solenoid valve and the first solenoid valve.

[0091] When the air pressure inside the vacuum chamber reaches the second air pressure threshold, the second solenoid valve is closed, and air continues to be supplied through the first solenoid valve until the air pressure inside the vacuum chamber reaches the standard atmospheric pressure, at which point the first solenoid valve is closed. Further, the first air pressure threshold is 200 mbar, and the second air pressure threshold is 800 mbar.

[0092] Furthermore, the processor 1001 can call the automatic vacuum chamber gas replenishment program stored in the memory 1005 and also perform the following operations:

[0093] The first solenoid valve controls the gas to enter the vacuum chamber from the vent pipe based on a preset first speed. When the gas pressure inside the vacuum chamber reaches the first gas pressure threshold, the second solenoid valve and the first solenoid valve simultaneously replenish the gas.

[0094] The preset first speed is determined based on the number and size of the weld points on the welded workpiece and the air pressure inside the vacuum chamber.

[0095] Furthermore, the processor 1001 can call the automatic vacuum chamber gas replenishment program stored in the memory 1005 and also perform the following operations:

[0096] The second gas replenishment rate is determined based on the current gas pressure inside the vacuum chamber, the first gas replenishment rate, and the standard atmospheric pressure.

[0097] Based on the second gas replenishment rate, the current gas pressure in the vacuum chamber is adjusted by the second solenoid valve.

[0098] Furthermore, the processor 1001 can call the automatic vacuum chamber gas replenishment program stored in the memory 1005 and also perform the following operations:

[0099] The solder joints on the workpiece are heated by a heater to melt the solder joints, wherein the composition of the soldering material of the solder joints includes tin;

[0100] After heating is completed, the heated workpiece is conveyed into the vacuum chamber via the workpiece conveyor belt.

[0101] The gas inside the vacuum chamber containing the heated workpiece is extracted using a vacuum pump until the gas pressure inside the vacuum chamber reaches 20-100 mbar, at which point the vacuum pump is turned off.

[0102] Furthermore, the automatic air replenishment system for the vacuum chamber also includes a guide plate, which is disposed between the air vent and the workpiece conveyor belt to buffer the impact of the gas introduced into the vacuum chamber from the air vent on the heated workpiece.

[0103] Furthermore, the air guide plate is a flat plate.

[0104] The vacuum chamber gas replenishment system described in this embodiment includes a vacuum chamber and a vent pipe. The vent pipe is equipped with a first solenoid valve and a second solenoid valve. When the gas pressure inside the vacuum chamber is less than a first pressure threshold, the first solenoid valve controls gas to enter the vacuum chamber through the vent pipe until the gas pressure inside the vacuum chamber reaches the first pressure threshold. Then, the second solenoid valve and the first solenoid valve simultaneously replenish gas. When the gas pressure inside the vacuum chamber reaches a second pressure threshold, the second solenoid valve is closed, and gas replenishment continues through the first solenoid valve until the gas pressure inside the vacuum chamber reaches standard atmospheric pressure. The first solenoid valve is closed. Since the gas pressure in the vacuum chamber changes slowly when the first solenoid valve initially controls the gas to enter the vacuum chamber from the vent pipe, the liquid welding material will not splash due to excessive air intake and low gas pressure. When the gas pressure inside the vacuum chamber reaches the first gas pressure threshold, the second solenoid valve and the first solenoid valve simultaneously replenish the gas until the gas pressure inside the vacuum chamber reaches the standard atmospheric pressure. The first solenoid valve is then closed. This ensures work efficiency while avoiding adverse effects on the welding of the workpiece, and also reduces cavity resonance, ultimately resulting in a smooth opening of the chamber.

[0105] Furthermore, embodiments of this application also propose a computer-readable storage medium storing an automatic vacuum chamber gas replenishment program, which, when executed by a processor, performs the following operations:

[0106] When the gas pressure inside the vacuum chamber is less than the first gas pressure threshold, gas is controlled by the first solenoid valve to enter the vacuum chamber from the vent pipe until the gas pressure inside the vacuum chamber reaches the first gas pressure threshold. Then, gas is replenished simultaneously by the second solenoid valve and the first solenoid valve.

[0107] When the air pressure inside the vacuum chamber reaches the second air pressure threshold, the second solenoid valve is closed, and air is continued to be supplied through the first solenoid valve until the air pressure inside the vacuum chamber reaches the standard atmospheric pressure, at which point the first solenoid valve is closed.

[0108] The vacuum chamber gas replenishment system described in this embodiment includes a vacuum chamber and a vent pipe. The vent pipe is equipped with a first solenoid valve and a second solenoid valve. When the gas pressure inside the vacuum chamber is less than a first pressure threshold, the first solenoid valve controls gas to enter the vacuum chamber through the vent pipe until the gas pressure inside the vacuum chamber reaches the first pressure threshold. Then, the second solenoid valve and the first solenoid valve simultaneously replenish gas. When the gas pressure inside the vacuum chamber reaches a second pressure threshold, the second solenoid valve is closed, and gas replenishment continues through the first solenoid valve until the gas pressure inside the vacuum chamber reaches standard atmospheric pressure. The first solenoid valve is closed. Since the gas pressure in the vacuum chamber changes slowly when the first solenoid valve initially controls the gas to enter the vacuum chamber from the vent pipe, the liquid welding material will not splash due to excessive air intake and low gas pressure. When the gas pressure inside the vacuum chamber reaches the first gas pressure threshold, the second solenoid valve and the first solenoid valve simultaneously replenish the gas until the gas pressure inside the vacuum chamber reaches the standard atmospheric pressure. The first solenoid valve is then closed. This ensures work efficiency while avoiding adverse effects on the welding of the workpiece, and also reduces cavity resonance, ultimately resulting in a smooth opening of the chamber.

[0109] It should be noted that when the above-mentioned computer-readable storage medium is executed by the processor, it can also implement the various steps in the above method and achieve the corresponding technical effects. This embodiment will not be described in detail here.

[0110] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or system. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or system that includes that element.

[0111] The sequence numbers of the embodiments in this application are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0112] Through the above description of the embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus necessary general-purpose hardware platforms. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, can be embodied in the form of a software artifact. This computer software artifact is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk) as described above, and includes several instructions to cause a terminal device (which may be a mobile phone, computer, server, air conditioner, or network device, etc.) to execute the methods described in the various embodiments of this application.

[0113] The above are merely preferred embodiments of this application and do not limit the patent scope of this application. Any equivalent structural or procedural transformations made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.

Claims

1. A method for automatic gas replenishment in a vacuum cavity, characterized in that, An automatic gas replenishment method for a vacuum chamber, which is part of a vacuum welding system, is applied to a vacuum chamber gas replenishment system. The system includes a vacuum chamber and a vent pipe, with a first solenoid valve and a second solenoid valve mounted on the vent pipe. The method comprises the following steps: When the gas pressure inside the vacuum chamber is less than the first gas pressure threshold, the first solenoid valve controls the gas to enter the vacuum chamber from the vent pipe until the gas pressure inside the vacuum chamber reaches the first gas pressure threshold. Then, the second solenoid valve and the first solenoid valve simultaneously replenish the gas. When the air pressure inside the vacuum chamber reaches the second air pressure threshold, the second solenoid valve is closed, and air is continued to be supplied through the first solenoid valve until the air pressure inside the vacuum chamber reaches the standard atmospheric pressure, at which point the first solenoid valve is closed. The step of controlling gas to enter the vacuum chamber through the vent pipe via the first solenoid valve until the gas pressure inside the vacuum chamber reaches the first gas pressure threshold, and then simultaneously replenishing gas via the second solenoid valve and the first solenoid valve, includes: The first solenoid valve controls the gas to enter the vacuum chamber from the vent pipe based on a preset first speed. When the gas pressure inside the vacuum chamber reaches the first gas pressure threshold, the second solenoid valve and the first solenoid valve simultaneously replenish the gas. The preset first speed is determined based on the number and size of the weld points on the welded workpiece and the air pressure inside the vacuum chamber. The preset first speed is calculated based on the following formula: Wherein, F represents the gas impact resistance that the welding material can withstand in its liquid state under corresponding gas pressure. For gas density, The area of ​​the weld joint. The number of the solder joints, the The distance coefficient between the vent outlet of the vent pipe and the weld point.

2. The automatic gas replenishment method for a vacuum cavity as described in claim 1, characterized in that, The first air pressure threshold is 200 mbar, and the second air pressure threshold is 800 mbar.

3. The automatic gas replenishment method for a vacuum cavity as described in claim 1, characterized in that, Before the step of simultaneously replenishing air through the second solenoid valve and the first solenoid valve, the method further includes: The second gas replenishment speed is determined based on the current gas pressure inside the vacuum chamber, the preset first speed, and the standard atmospheric pressure. Based on the second gas replenishment rate, the current gas pressure in the vacuum chamber is adjusted by the second solenoid valve.

4. The automatic gas replenishment method for a vacuum cavity as described in claim 1, characterized in that, The vacuum chamber is also equipped with a workpiece conveyor belt. Before the step of controlling the gas to enter the vacuum chamber from the vent pipe via the first solenoid valve, the method further includes: The solder joints on the workpiece are heated by a heater to melt the solder joints, wherein the composition of the soldering material of the solder joints includes tin; After heating is completed, the heated workpiece is conveyed into the vacuum chamber via the workpiece conveyor belt. The gas inside the vacuum chamber containing the heated workpiece is extracted using a vacuum pump until the gas pressure inside the vacuum chamber reaches 20-100 mbar, at which point the vacuum pump is turned off.

5. The automatic gas replenishment method for a vacuum cavity as described in claim 4, characterized in that, The vacuum chamber gas replenishment system also includes a guide plate, which is disposed between the vent pipe and the workpiece conveyor belt to buffer the impact of the gas introduced into the vacuum chamber from the vent pipe on the heated workpiece.

6. The automatic gas replenishment method for a vacuum cavity as described in claim 5, characterized in that, The air guide plate is a flat plate.

7. A vacuum chamber gas replenishment system, characterized in that, The vacuum chamber gas replenishment system is part of the vacuum welding system. The vacuum chamber gas replenishment system includes a vacuum chamber, a vent pipe, and an automatic vacuum chamber gas replenishment device. The vent pipe is equipped with a first solenoid valve and a second solenoid valve. The automatic vacuum chamber gas replenishment device includes: The first gas replenishment module is used to control gas to enter the vacuum chamber from the vent pipe through the first solenoid valve when the gas pressure inside the vacuum chamber is less than the first gas pressure threshold, until the gas pressure inside the vacuum chamber reaches the first gas pressure threshold, and then replenish gas through the second solenoid valve and the first solenoid valve simultaneously. The second gas replenishment module is used to close the second solenoid valve when the gas pressure inside the vacuum chamber reaches the second gas pressure threshold, and continue to replenish gas through the first solenoid valve until the gas pressure inside the vacuum chamber reaches the standard atmospheric pressure, and then close the first solenoid valve. The first gas replenishment module is used to control gas to enter the vacuum chamber from the vent pipe through the first solenoid valve until the gas pressure inside the vacuum chamber reaches the first gas pressure threshold, and then simultaneously replenishes gas through the second solenoid valve and the first solenoid valve, including: The first solenoid valve controls the gas to enter the vacuum chamber from the vent pipe based on a preset first speed. When the gas pressure inside the vacuum chamber reaches the first gas pressure threshold, the second solenoid valve and the first solenoid valve simultaneously replenish the gas. The preset first speed is determined based on the number and size of the weld points on the welded workpiece and the air pressure inside the vacuum chamber. The preset first speed is calculated based on the following formula: Wherein, F represents the gas impact resistance that the welding material can withstand in its liquid state under corresponding gas pressure. For gas density, The area of ​​the weld joint. The number of the solder joints, the The distance coefficient between the vent outlet of the vent pipe and the weld point.

8. A device, characterized in that, The device includes: a memory, a processor, and an automatic vacuum chamber gas replenishment program stored in the memory and executable on the processor, the automatic vacuum chamber gas replenishment program being configured to implement the steps of the automatic vacuum chamber gas replenishment method as described in any one of claims 1 to 6.

9. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores an automatic vacuum chamber gas replenishment program, which, when executed by a processor, implements the steps of the automatic vacuum chamber gas replenishment method as described in any one of claims 1 to 6.

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