Electron beam welding system

Abstract

The utility model provides an electron beam welding system, which relates to the technical field of mechanical equipment and comprises a welding machine and an electrical system electrically connected with the welding machine, the welding machine comprises a welding gun and a welding chamber fixedly connected with the welding gun, and at least two welding station platforms are arranged in the welding chamber; the electrical system comprises a control module, and a power supply module, a gun vacuum module, a monitoring camera module, a focusing module, a cooling module, a chamber vacuum module and a mechanical motion module which are electrically connected with the control module; the power module, the gun vacuum module, the monitoring camera module and the focusing module are electrically connected with the welding gun. The chamber vacuum module and the mechanical motion module are electrically connected with the welding chamber. The cooling module is electrically connected with the chamber vacuum module. The welding machine is matched with an electrical system to work, a double-station welding mode is adopted, two workpieces are produced at the same time, and the production efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical equipment, in particular to an electron beam welding system. Background Art

[0002] The manufacturing process of the superconducting composite sheath is a complex task involving precision engineering technology, especially in the key link of electron beam welding. This welding technology is carried out in a vacuum environment, using an electron beam as the heat source, ensuring a high vacuum is maintained inside the sheath during the welding process, effectively preventing the oxidation of the internal superconducting core wire. This step is crucial for maintaining the superconducting properties of the superconducting material, as oxidation will destroy the superconducting properties of the material.

[0003] In the traditional superconducting composite sheath welding process, the common practice is to place the sheath together with the upper cover and the lower cover into a heat treatment furnace protected by vacuum nitrogen for heating and degassing, and then move the whole into the welding chamber of the electron beam welder for welding. After the beam sealing is completed, to ensure that the weld quality is not oxidized, the superconducting composite sheath is vacuum cooled in the electron beam welding chamber for 1 - 8 hours. Although this process can complete the welding of the sheath, due to the long time-consuming in the vacuum degassing and vacuum cooling processes, it seriously affects the production efficiency and is difficult to meet the requirements of high-efficiency production in modern industry. Summary of the Utility Model

[0004] The utility model provides an electron beam welding system to solve the problems of time-consuming and low production efficiency in the traditional superconducting composite sheath welding.

[0005] To solve the above technical problems, the technical solution of the utility model is as follows:

[0006] An electron beam welding system, comprising:

[0007] A welder and an electrical system electrically connected to the welder. The welder includes a welding gun and a welding chamber fixedly connected to the welding gun, and at least 2 welding station platforms are arranged in the welding chamber;

[0008] The electrical system includes a control module, and a power module, a gun vacuum module, a monitoring camera module, a focusing module, a cooling module, a chamber vacuum module and a mechanical movement module electrically connected to the control module;

[0009] The power module, the gun vacuum module, the monitoring camera module, and the focusing module are respectively electrically connected to the welding gun;

[0010] The chamber vacuum module and the mechanical movement module are respectively electrically connected to the welding chamber;

[0011] The cooling module is electrically connected to the chamber vacuum module.

[0012] Optionally, the welding torch includes:

[0013] An electron gun;

[0014] Focusing devices arranged on both sides of the electron gun, and the focusing devices are electrically connected to the focusing module.

[0015] Optionally, an air resistance valve is arranged at the top of the electron gun, and the air resistance valve is used to connect the welding torch and the welding chamber.

[0016] Optionally, the gun vacuum module includes:

[0017] A first mechanical pump and a molecular pump, and both the first mechanical pump and the molecular pump are electrically connected to the control module.

[0018] Optionally, the gun vacuum module is equipped with a device for automatically detecting and adjusting the vacuum degree to ensure that the welding torch operates at a preset vacuum degree.

[0019] Optionally, the chamber vacuum module includes a second mechanical pump, a Roots pump, and a diffusion pump, and the second mechanical pump, the Roots pump, and the diffusion pump are all electrically connected to the control module.

[0020] Optionally, the cooling module is electrically connected to the diffusion pump and is used to control the operating temperature of the diffusion pump.

[0021] Optionally, the monitoring camera module includes a reflecting lens and an observation camera, and the observation camera is electrically connected to the control module.

[0022] Optionally, the electron beam welding system further includes:

[0023] A servo drive device arranged inside the welding chamber;

[0024] The servo drive device is electrically connected to the mechanical motion module, and the welding station platform is fixedly connected to the servo drive device.

[0025] The above solution of the present utility model has at least the following beneficial effects:

[0026] The above solution of the present utility model includes: a welding machine and an electrical system electrically connected to the welding machine. The welding machine includes a welding torch, and a welding chamber fixedly connected to the welding torch. At least two welding station platforms are arranged in the welding chamber. The electrical system includes a control module, and a power supply module, a gun vacuum module, a monitoring camera module, a focusing module, a cooling module, a chamber vacuum module, and a mechanical movement module that are electrically connected to the control module. The power supply module, the gun vacuum module, the monitoring camera module, and the focusing module are respectively electrically connected to the welding torch. The chamber vacuum module and the mechanical movement module are respectively electrically connected to the welding chamber. The cooling module is electrically connected to the chamber vacuum module. With the cooperation of the welding machine and the electrical system in the solution of the present utility model, a double workpiece fixture is installed in the welding chamber, and a double-station welding method is adopted. Two superconducting composite sheath workpieces are loaded, evacuated once, and the two workpieces are spot welded and sealed in sequence. After welding, they are cooled in vacuum in the welding chamber together, realizing the simultaneous production of the two workpieces and improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 FIG. is a schematic structural diagram of an electron beam welding system provided by an embodiment of the present utility model.

[0028] DESCRIPTION OF THE REFERENCE NUMERALS:

[0029] 1. Welding torch; 11. Electron gun; 12. Focusing device; 13. Air resistance valve; 2. Welding chamber; 21. Welding station platform; 22. Servo drive device; 31. Control module; 32. Power supply module; 33. Gun vacuum module; 34. Monitoring camera module; 35. Focusing module; 36. Cooling module; 37. Chamber vacuum module; 38. Mechanical movement module. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0030] Hereinafter, exemplary embodiments of the present utility model will be described in more detail with reference to the drawings. Although the exemplary embodiments of the present utility model are shown in the drawings, it should be understood that the present utility model can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided so that the present utility model can be more thoroughly understood and the scope of the present utility model can be fully conveyed to those skilled in the art.

[0031] As Figure 1 shown, an embodiment of the present utility model provides an electron beam welding system, including:

[0032] A welding machine and an electrical system electrically connected to the welding machine. The welding machine includes a welding torch 1 and a welding chamber 2 fixedly connected to the welding torch 1. At least two welding station platforms 21 are arranged in the welding chamber 2.

[0033] The electrical system includes a control module 31, and a power supply module 32, a gun vacuum module 33, a monitoring camera module 34, a focusing module 35, a cooling module 36, a chamber vacuum module 37, and a mechanical motion module 38 that are electrically connected to the control module 31;

[0034] The power supply module 33, the gun vacuum module 33, the monitoring camera module 34, and the focusing module 35 are respectively electrically connected to the welding gun 1;

[0035] The chamber vacuum module 37 and the mechanical motion module 38 are respectively electrically connected to the welding chamber 2;

[0036] The cooling module 36 is electrically connected to the chamber vacuum module 37.

[0037] In this embodiment, the electron beam welding system includes a welding machine and an electrical system electrically connected to the welding machine. The welding machine enlarges the volume of the welding chamber 2. At least two welding station platforms 21 are arranged in the welding chamber 2. The double-station welding method is adopted to load two superconducting composite sheath workpieces. At the same time, the chamber vacuum module 37 adds 1 diffusion pump to improve the vacuum pumping speed of the welding chamber 2. After one-time vacuum pumping, the two workpieces are spot-welded and sealed in sequence. After welding, they are cooled in vacuum in the welding chamber 2 together, realizing the simultaneous production of the two workpieces and improving the production efficiency.

[0038] The electrical system includes a control module 31, a power supply module 32, a gun vacuum module 33, a monitoring camera module 34, a focusing module 35, a cooling module 36, a chamber vacuum module 37, and a mechanical motion module 38. The control module 31 adopts a PLC control system to perform automatic control on other modules, control the start and stop of the vacuum pumps and valves of the gun vacuum module 33 and the chamber vacuum module 37, and realize the vacuum degree of the welding gun 1 and the welding chamber 2; the PLC control system monitors and adjusts various parameters in the welding process, such as grid bias, filament, high voltage, beam current speed, and workbench positioning, etc., to ensure the stability of the welding process.

[0039] The power supply module 32 adopts a high-voltage power supply, which is connected to the welding gun 1 through a high-voltage cable to control the high voltage, grid bias, filament, and beam current of the welding gun 1. The stability of the high-voltage power supply determines the quality of the welding.

[0040] During the entire welding process, the welding parameters, such as grid bias, filament, high voltage, beam current, speed, and focusing current, are precisely controlled through the electrical system to achieve high-quality welds, ensuring the high efficiency, stability, and safety of the electron beam welding process. The optimization of these parameters helps to obtain uniform and defect-free welds, ensuring that the superconducting wire has excellent mechanical properties and electrical properties during subsequent extrusion and stretching processes.

[0041] In an alternative embodiment of the present utility model, the welding gun 1 includes:

[0042] Electron gun 11;

[0043] Focusing devices 12 arranged on both sides of the electron gun 11, and the focusing devices 12 are electrically connected to the focusing module 35.

[0044] In this embodiment, the electron gun 11 is a device for generating an electron beam, which includes a cathode for emitting electrons; the focusing device 12 includes a focusing coil, a deflection coil and a magnetic lens;

[0045] After the electrons emitted by the electron gun 11 are accelerated by a 60 kV high-voltage acceleration field, they pass through the focusing device 12 and are focused on the electrons under the control of the focusing module 35. The electrons are focused by passing through the focusing coil and the deflection coil and then through the magnetic lens, forming an electron beam with a high energy density, and the electron beam is focused on the workpiece.

[0046] In an alternative embodiment of the present invention, an air resistance valve 13 is provided at the top of the electron gun 11, and the air resistance valve 13 is used to connect the welding torch 1 and the welding chamber 2.

[0047] In this embodiment, the air resistance valve 13 is arranged at the top of the electron gun 11 and is used to connect the welding torch 1 and the welding chamber 2.

[0048] Optionally, in this embodiment, the air resistance valve 13 is a V1 valve.

[0049] In an alternative embodiment of the present invention, the gun vacuum module 33 includes:

[0050] A first mechanical pump and a molecular pump, and both the first mechanical pump and the molecular pump are electrically connected to the control module 31.

[0051] In an alternative embodiment of the present invention, the gun vacuum module 32 is equipped with a vacuum degree automatic detection and adjustment device to ensure that the welding torch 1 works under a preset vacuum degree.

[0052] In the above embodiment, a first mechanical pump and a molecular pump are arranged in the gun vacuum module 33. The first mechanical pump is a small mechanical pump, and the start and stop of the small mechanical pump and the molecular pump are precisely controlled by the control module 31 to quickly evacuate the inside of the welding torch 1 and control the vacuum degree of the welding torch 1;

[0053] At the same time, through the vacuum degree automatic detection and adjustment device equipped on the gun vacuum module 32, the vacuum degree inside the welding torch 1 is monitored in real time to ensure that the welding torch 1 works under a preset vacuum degree, prevent the penetration of any external gas, and guarantee the internal quality of the superconducting wire.

[0054] In an alternative embodiment of the present invention, a second mechanical pump, a Roots pump and a diffusion pump are arranged in the chamber vacuum module 37, and the second mechanical pump, the Roots pump and the diffusion pump are all electrically connected to the control module 31.

[0055] In this embodiment, a second mechanical pump, a Roots pump, and a diffusion pump are arranged in the chamber vacuum module 37. The second mechanical pump is a large mechanical pump, and the start and stop of the large mechanical pump, the Roots pump, and the diffusion pump are precisely controlled by the control module 31 to quickly evacuate the welding chamber 2, ensuring a high vacuum is maintained inside the sheath during the welding process and effectively preventing the oxidation of the internal superconducting core wires.

[0056] Moreover, after welding is completed, the sheath is cooled inside the welding chamber 2. Maintaining the vacuum degree inside the welding chamber 2 helps reduce thermal stress and thermal deformation, ensuring that the material retains its original physical properties, significantly improving the welding quality of the superconducting composite sheath, reducing welding defects such as pores and cracks, and thus increasing the yield rate.

[0057] Compared with the prior art, one diffusion pump is added inside the welding chamber 2, improving the evacuation speed of the welding chamber 2.

[0058] In an alternative embodiment of the present utility model, the cooling module 36 is electrically connected to the diffusion pump for controlling the operating temperature of the diffusion pump.

[0059] In this embodiment, the cooling module 36 adopts a water cooling system;

[0060] To maintain a high-vacuum environment in the welding chamber 2, the diffusion pump needs to operate within a safe temperature range. The temperature of the diffusion pump is controlled by water cooling through the cooling module 36 to ensure that the diffusion pump can operate normally.

[0061] In an alternative embodiment of the present utility model, the monitoring camera module 34 includes a reflecting lens and an observation camera, and the observation cameras are all electrically connected to the control module 31.

[0062] In this embodiment, the reflecting lens is arranged inside the welding chamber 2, and the observation camera is arranged inside the welding machine 1. Based on the principle of optical light reflection, the reflecting lens and the observation camera are used in cooperation to observe the welding situation in the welding chamber 2, check the position and welding quality of the weld seam, and transmit the real-time monitoring data and images to the control module 31.

[0063] In an alternative embodiment of the present utility model, the electron beam welding system further includes:

[0064] A servo drive device 22 arranged inside the welding chamber 2;

[0065] The servo drive device 22 is electrically connected to the mechanical motion module 38, and the welding station platform 21 is fixedly connected to the servo drive device 22.

[0066] In this embodiment, the mechanical motion module 38 is responsible for the positioning control of the X-axis, Y-axis, and gun axis, as well as the control of the rotation speeds of R1 and R2 of the welding station platform 21;

[0067] It also controls the movement of the gun and the positioning movement of the welding chamber door;

[0068] Among them, the control of the gun axis is carried out by the servo drive device 22, and the servo drive device 22 communicates with the PLC control system through the EtherCAT (Ethernet Control Automation Technology) bus.

[0069] The electron beam welding system of the present utility model has the following specific working process:

[0070] Put the two superconducting composite sheaths into the special fixtures respectively. Click the "chamber door" button on the touch screen to realize the automatic entry of the workpiece into the welding chamber 2, complete the automatic positioning, automatically close the chamber door and detect the signal that the chamber door is tightly closed.

[0071] Put the sheath body together with the upper cover and the lower cover into the welding chamber 2 of the welding machine. Pull down the lower cover to a distance of 5 mm - 10 mm from the end of the sheath body, and evacuate the welding chamber 2. When the vacuum degree in the welding chamber 2 reaches 3x10 -3 mbar to 6x10 -5 mbar, the gas resistance valve 13 is opened simultaneously. Keep evacuating at this vacuum degree for at least 1 hour to achieve the vacuum inside the sheath body. Make the lower cover fit with the sheath body through the end face pressing device, and both workpieces are completed at the same time. The servo drive device 22 at the first station drives the sheath body to rotate at a constant speed, and eight-point spot welding is carried out at the welds where the upper cover, lower cover and sheath body are combined. During the spot welding process, check whether the weld position is centered through the monitoring camera module 34, and then carry out electron beam seal welding, that is, carry out small beam current welding once and then large beam current welding once. After the welding of the workpiece at the first station is completed, the mechanical motion module 38 controls the gun axis to be positioned at the second station position to weld the second workpiece. After the welding of the two workpieces is completed, the superconducting composite sheath is vacuum cooled in the welding chamber 2 for 1 - 8 hours. When the cooling time is up, the chamber door is automatically opened, and the welding station platform 21 is automatically pushed out of the welding chamber 2, and the detachable superconducting composite sheath can be removed.

[0072] The electron beam welding system described in the above embodiment of the present utility model expands the volume of the welding chamber, installs a double-workpiece fixture in the chamber, adopts a double-station welding method, loads two superconducting composite sheath workpieces, and at the same time, the chamber vacuum system adds 1 diffusion pump to improve the evacuation speed of the welding chamber. After evacuating once, the two workpieces are spot welded and seal welded in sequence. After the welding is completed, they are cooled in vacuum in the welding chamber together to realize the simultaneous production of the two workpieces and improve the production efficiency.

[0073] During the entire welding process, precise control of welding parameters by the electrical system, such as grid bias, filament, high voltage, beam current, speed, and focusing current, is crucial for achieving high-quality welds. Optimization of these parameters helps obtain uniform and defect-free welds, ensuring excellent mechanical and electrical properties of the superconducting wire during subsequent extrusion and stretching processes.

[0074] The above is the preferred embodiment of the present utility model. It should be noted that for those of ordinary skill in the art, without departing from the principle described in the present utility model, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present utility model.

Claims

1. An electron beam welding system, comprising: A welding machine and an electrical system electrically connected to the welding machine, characterized in that the welding machine comprises a welding gun (1), a welding chamber (2) fixedly connected to the welding gun (1), and at least two welding station platforms (21) are arranged in the welding chamber (2); The electrical system comprises a control module (31), and a power module (32) electrically connected to the control module (31), a gun vacuum module (33), a monitoring camera module (34), a focusing module (35), a cooling module (36), a chamber vacuum module (37) and a mechanical motion module (38); The power module (33), the gun vacuum module (33), the monitoring camera module (34), and the focusing module (35) are electrically connected to the welding gun (1) respectively; The chamber vacuum module (37) and the mechanical motion module (38) are electrically connected to the welding chamber (2) respectively; The cooling module (36) is electrically connected to the chamber vacuum module (37).

2. The electron beam welding system according to claim 1, characterized in that: The welding gun (1) comprises: Electron gun (11); A focusing device (12) is arranged on both sides of the electron gun (11), and the focusing device (12) is electrically connected to the focusing module (35).

3. The electron beam welding system according to claim 2, characterized in that: A gas block valve (13) is arranged on the top of the electron gun (11), and the gas block valve (13) is used to connect the welding gun (1) and the welding chamber (2).

4. The electron beam welding system according to claim 1, characterized in that The gun vacuum module (33) comprises: A first mechanical pump and a molecular pump, wherein the first mechanical pump and the molecular pump are both electrically connected to the control module (31).

5. The electron beam welding system according to claim 4, characterized in that: The gun vacuum module (32) is equipped with an automatic vacuum degree detection and adjustment device to ensure that the welding gun (1) operates at a preset vacuum degree.

6. The electron beam welding system according to claim 1, characterized in that The chamber vacuum module (37) comprises a second mechanical pump, a Roots pump and a diffusion pump, and the second mechanical pump, the Roots pump and the diffusion pump are all electrically connected to the control module (31).

7. The electron beam welding system according to claim 6, characterized in that The cooling module (36) is electrically connected to the diffusion pump and is used to control the operating temperature of the diffusion pump.

8. The electron beam welding system according to claim 1, characterized in that The monitoring camera module (34) comprises a reflective lens and an observation camera, and the observation camera is electrically connected to the control module (31).

9. The electron beam welding system according to claim 1, characterized in that: Also includes: A servo drive device (22) disposed inside the welding chamber (2); The servo drive device (22) is electrically connected to the mechanical motion module (38), and the welding station platform (21) is fixedly connected to the servo drive device (22).

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