Electron beam welding device for alloy resistor machining

Abstract

The invention discloses an electron beam welding device for alloy resistor machining, and relates to the technical field of alloy resistor welding, the electron beam welding device comprises an electron beam welding machine body, the electron beam welding machine body comprises a vacuum chamber, and an electron beam welding gun and a tool clamping plate are installed in an inner cavity of the vacuum chamber; the hollow pressing rods are connected to the upper surface of the tool clamping plate in a sliding mode, the inert gas output assembly is arranged over the tool clamping plate, and the inert gas output assembly can synchronously and horizontally move along with the electron beam welding gun and can output inert gas to the contact ends of the two ends of the alloy resistor. A gas protection layer is formed in a welding area before welding operation, the inert gas output assembly and the electron beam welding gun move synchronously, inert gas is output before welding to form the gas protection layer, oxygen molecules are isolated, residual inert gas is sucked during welding, the welding environment is further purified, and the welding quality is improved. Meanwhile, airflow is used for taking away part of welding heat to assist cooling.

Description

Technical Field

[0001] This invention relates to the field of alloy resistance welding technology, specifically to an electron beam welding apparatus for alloy resistance processing. Background Technology

[0002] Alloy resistors are electronic components that use metal alloy materials as resistive elements. They are widely used in precision measurement, power management, current detection, industrial control and other fields. Alloy resistors are often used in electronic circuits for high-precision, high-current applications such as current sampling and power detection. The quality of the welding between the alloy resistor and the electrode plate directly affects its conductivity and structural stability. Existing welding methods include laser welding, arc welding and vacuum electron beam welding. Vacuum electron beam welding, as a high-energy-density welding technology, has advantages such as concentrated energy, fast welding speed, and extremely small heat-affected zone. Moreover, the entire welding process is carried out in a vacuum environment, which can effectively avoid the contamination of the welding area by gases such as oxygen and nitrogen in the air, thereby significantly improving the purity and mechanical properties of the weld joint. It is particularly suitable for the processing of precision components such as alloy resistors that have extremely high requirements for welding quality. However, in practical applications, it has been found that when traditional vacuum electron beam welding equipment welds alloy resistors, although the whole environment is in a vacuum, the temperature at the contact end of the alloy resistor will rise rapidly at the moment of welding. This will cause the oxide film on the material surface (such as Al2O3, NiO, etc.) to partially decompose at high temperature, releasing oxygen. If these gases are not removed or isolated in time, they may still react with the molten metal, causing the weld to be oxidized and affecting the weld quality. In addition, when batch welding is carried out, more oxygen is released. If this oxygen cannot be recovered, it will gradually accumulate in the vacuum chamber, causing fluctuations in the oxygen partial pressure in the chamber. Under the same welding parameters, the weld quality of the preceding products is qualified, but the subsequent products will gradually show defects such as oxidation spots and weld brittleness. Existing solutions involve staged welding to allow the material to slowly release gas, or adding an additional negative pressure structure to the welding area to absorb the gas released from the material. However, both staged welding and negative pressure adsorption are remedial measures during the welding process and cannot form a protective barrier before the oxidation reaction. This results in a risk of partial weld oxidation during the welding process, affecting the stability of the welding quality.

[0003] To address the aforementioned issues, there is an urgent need for innovative designs for existing electron beam welding equipment. Summary of the Invention

[0004] The present invention addresses the problem that existing technical solutions are too simplistic and provides a solution that is significantly different from existing technologies. Specifically, the purpose of the present invention is to provide an electron beam welding device for alloy resistance processing, so as to solve the problem mentioned in the background that existing electron beam welding devices cannot adequately isolate oxygen molecules before welding, thus affecting the quality of the weld.

[0005] To achieve the above objectives, the present invention provides the following technical solution: an electron beam welding device for alloy resistance processing, comprising an electron beam welding machine body, the electron beam welding machine body comprising a vacuum chamber, an electron beam welding gun and a tooling clamp plate being installed in the inner cavity of the vacuum chamber, and further comprising a plurality of hollow pressure rods slidably connected to the upper surface of the tooling clamp plate, and an inert gas output component disposed directly above the tooling clamp plate, the inert gas output component being able to move horizontally synchronously with the electron beam welding gun, and being able to output inert gas to the contact ends of both ends of the alloy resistance, so as to form a gas protective layer in the welding area before the welding operation; The front end of the hollow pressure bar is attached to a movable block, which is used to recover the inert gas, and the recovery process is synchronized with the welding operation.

[0006] Preferably, one side of the tooling clamp is bent upward to form a first side plate, and a second side plate is slidably connected to the other side of the tooling clamp. The inner wall of the tooling clamp is provided with a slotted loading position, and a lead screw is rotatably connected to the slotted loading position. A slider is threaded to the outside of the lead screw, and the slider is fixedly connected to the bottom of the second side plate. Both the first side plate and the second side plate are provided with straight sliding grooves, and the bottom of the inner wall of each straight sliding groove is provided with a groove. Both ends of the hollow pressure rod are fixedly connected with protrusions, and the protrusions are respectively inserted into the corresponding grooves.

[0007] Preferably, the hollow pressure rod has several micro holes on both sides, and several tentacles are fixedly connected to the bottom of the hollow pressure rod. The end of the hollow pressure rod near the moving block is set as an open structure, and the other end of the hollow pressure rod is set as a sealed structure.

[0008] Preferably, the inert gas output assembly includes two symmetrically distributed first pipes, each with a second pipe inserted at its front end. The two first pipes are fixedly connected by two ports of a tee pipe, and a flexible tube is fixedly connected to the remaining port of the tee pipe. The end of the flexible tube is fixedly connected to a main gas pipe via a rigid connector. The flexible tube, the rigid connector, and the main gas pipe are interconnected. A limiting plate is fixedly connected to the upper surface of the tooling clamp, and a sliding groove is provided on the limiting plate for the rigid connector to slide.

[0009] Preferably, both of the first pipes are slidably connected to a sliding rod, one end of which is fixedly connected to a rigid connector, and the other end of which is fixedly connected to a hydraulic telescopic rod. The top of the sliding rod is fixedly connected to the outer shell of the electron beam welding gun via a connecting rod.

[0010] Preferably, the hydraulic telescopic rod includes an outer tube, a piston is slidably connected to the inner wall of the outer tube, a connecting rod is fixedly connected to one side of the piston, and a circular connecting block is fixedly connected to the other side of the piston.

[0011] Preferably, the circular connecting block has a hollow cavity structure inside, and the side wall of the circular connecting block has several through grooves. The end of the second pipe passes through the front end face of the outer tube and communicates with the cavity of the circular connecting block. One end of the connecting rod passes through the end face of the outer tube. A return spring is fixedly connected between the connecting rod and the outer tube, and the return spring is located outside the outer tube. An oil pipe is fixedly inserted into the side wall of the outer tube.

[0012] Preferably, the top of the movable block is fixedly connected to the outer tube body by two clamping blocks, the inside of the movable block is provided with a cavity, the inner side of the movable block is provided with a connecting interface, the movable block is connected to the hollow pressure rod through the connecting interface, and an exhaust pipe is inserted into the outer side of the movable block.

[0013] Compared with the prior art, the beneficial effects of the present invention are: By synchronously moving the inert gas output component with the electron beam welding torch, inert gas is directionally output to the contact ends of the alloy resistors before welding, forming a sealed gas protective layer in the welding area in advance. The pre-filled inert gas directly drives away residual air molecules in the welding area, prioritizing protective operations over welding. Before the formal welding begins, this process can form a continuous and stable inert gas protective layer in the welding area, effectively isolating residual air. During the welding process, even if the oxide film on the outside of the material ruptures due to high temperature and releases a small amount of oxygen molecules, it will be quickly diluted and carried away by the continuously flowing inert gas, preventing oxygen molecules from accumulating near the weld and forming oxidation defects. This reduces the risk of weld oxidation from the root and ensures welding quality.

[0014] Furthermore, the inert gas output component's operation process is mainly divided into an extraction stage and an exhaust stage. In the extraction stage, the second pipe is used to draw inert gas, forming a concentrated airflow stream. In the exhaust stage, the piston moves forward to compress the inert gas temporarily stored in the front cavity of the outer tube, and then redirects it through the second pipe to quickly establish a new protective layer for the second alloy resistance material. Whether in the extraction or exhaust stage, a continuous airflow stream is formed, creating protection before welding. This alternating extraction and exhaust operation mode realizes the closed-loop recovery and reuse of inert gas, significantly reducing the ineffective loss of inert gas and lowering the cost of welding consumables.

[0015] In addition, the addition of a moving block and a hollow pressure bar allows for the ducting of air, enabling the recovery of inert gas during welding operations. This prevents residual inert gas from spreading disorderly in a vacuum environment and causing pressure fluctuations. Furthermore, continuous extraction during welding operations can remove trace amounts of gas generated by the high-temperature evaporation of materials during welding, further purifying the welding environment. Simultaneously, it can also promptly remove some of the heat generated during welding through airflow, playing a role in auxiliary cooling. This allows the temperature of the weld area to gradually decrease during solidification, forming initial cooling and reducing defects such as coarse grains or hot cracks caused by local overheating. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0017] Figure 2 This is a schematic diagram of the assembly of the tooling clamp plate and the alloy resistor inside the vacuum chamber of the present invention.

[0018] Figure 3 This is a schematic diagram of the tooling clamping plate structure of the present invention.

[0019] Figure 4 This is a schematic diagram of the connection structure between the hollow pressure bar and the tooling clamping plate of the present invention.

[0020] Figure 5 This is a schematic diagram of the inert gas output component of the present invention.

[0021] Figure 6 This is a comparison diagram of the first and second pipes of the present invention after being combined and separated.

[0022] Figure 7 This is a cross-sectional view of the hydraulic telescopic rod of the present invention.

[0023] Figure 8 This is a schematic diagram of the disassembled structure of the circular connecting block and the second pipe of the present invention.

[0024] Figure 9 This is a schematic diagram of the structure of the movable block and hollow pressure bar after disassembly.

[0025] In the diagram: 1. Electron beam welding machine body; 101. Vacuum chamber; 102. Electron beam welding gun; 103. Tooling clamp; 104. First side plate; 105. Second side plate; 106. Lead screw; 2. Hollow pressure rod; 201. Protrusion; 202. Micro-hole; 203. Tentacle; 3. Inert gas output assembly; 301. First pipe; 302. Second pipe; 303. Hose; 304. Rigid connector; 305. Main gas pipe; 306. Sliding rod; 307. Outer tube; 308. Piston; 309. Connecting rod; 3010. Circular connecting block; 3011. Return spring; 3012. Oil pipe; 4. Moving block; 5. Interlocking interface; 6. Exhaust pipe; 7. Connecting rod. Detailed Implementation

[0026] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0027] Please see Figures 1 to 9 The present invention provides a technical solution: an electron beam welding device for alloy resistance processing, comprising an electron beam welding machine body 1, the electron beam welding machine body 1 comprising a vacuum chamber 101, an electron beam welding gun 102 and a tooling clamping plate 103 installed in the inner cavity of the vacuum chamber 101, and further comprising a plurality of hollow pressure rods 2 slidably connected to the upper surface of the tooling clamping plate 103, and an inert gas output component 3 disposed directly above the tooling clamping plate 103, the inert gas output component 3 being able to move horizontally synchronously with the electron beam welding gun 102, and being able to output inert gas to the contact ends of both ends of the alloy resistance, so as to form a gas protective layer in the welding area before the welding operation; The front end of the hollow pressure bar 2 is attached to a movable block 4, which is used to recover the inert gas, and the recovery process is synchronized with the welding operation.

[0028] By synchronously moving horizontally with the inert gas output component 3 and the electron beam welding gun 102, inert gas is directionally output to the contact ends of the alloy resistors before welding, forming a closed gas protective layer in the welding area in advance. The pre-filled inert gas directly drives away the residual air molecules in the welding area, thus prioritizing the protective operation over welding in terms of time. Before the formal welding begins, this process can form a continuous and stable inert gas protective layer in the welding area, effectively isolating residual air and preventing oxygen molecules from accumulating near the weld to form oxidation defects. This reduces the risk of weld oxidation from the root and ensures welding quality.

[0029] In addition, a moving block 4 and a hollow pressure rod 2 are added. The hollow pressure rod 2 is used to guide the gas and recover the inert gas while the welding operation is being carried out. This prevents the gas from spreading disorderly in the vacuum chamber 101, fundamentally stabilizes the oxygen partial pressure in the chamber, and solves the problem of oxygen partial pressure fluctuation during batch welding.

[0030] In this embodiment, as Figure 1 , Figure 2 and Figure 3 As shown, one side of the tooling clamp 103 is bent upward to form a first side plate 104, and the other side of the tooling clamp 103 is slidably connected to a second side plate 105. The inner wall of the tooling clamp 103 is provided with a slotted loading position, and a lead screw 106 is rotatably connected in the slotted loading position. The lead screw 106 is externally threaded to a slider, and the slider is fixedly connected to the bottom of the second side plate 105. Both the first side plate 104 and the second side plate 105 are provided with straight sliding grooves, and the bottom of the inner wall of the straight sliding grooves is provided with grooves. Both ends of the hollow pressure rod 2 are fixedly connected to protrusions 201, and the protrusions 201 are respectively inserted into the corresponding grooves. The hollow pressure rod 2 has several micro holes 202 on both sides, and several tentacles 203 are fixedly connected to the bottom of the hollow pressure rod 2. The end of the hollow pressure rod 2 near the moving block 4 is set as an open structure, and the other end of the hollow pressure rod 2 is set as a sealed structure. It should be noted that before the actual welding operation, the front door of the electron beam welding machine body 1 is opened first, the tooling clamp 103 is slid out of the vacuum chamber 101, and the electrode plate is limited and fixed by the first side plate 104 and the second side plate 105. At the same time, the hollow pressure rod 2 is used to fix the alloy resistor body to prevent the position of the alloy resistor from shifting during the assembly process. Specifically, one side of the electrode plate is first placed against the inner wall of the first side plate 104. Then, the second side plate 105 is moved laterally along the tooling clamping plate 103 by rotating the lead screw 106 to drive the slider. This adjusts the distance between the first side plate 104 and the second side plate 105 until both sides of the electrode plate are clamped and fixed. Through the cooperation of the lead screw 106 and the slider, it can adapt to the clamping requirements of electrode plates of different specifications. After the electrode plate is placed on the surface of the tooling clamp 103, the hollow pressure rod 2 is slid to make its straight groove slide in a straight line. At the bottom of both ends of the hollow pressure rod 2, there are protrusions 201 fixedly connected. The protrusions 201 are inserted into the corresponding grooves. When the hollow pressure rod 2 slides along the straight groove, the grooves further limit the protrusions 201, so that the protrusions 201 can only move up and down and cannot sway left and right, ensuring the stability of the hollow pressure rod 2 during the sliding process. When the hollow pressure rod 2 slides to directly above the alloy resistor body, until several of the contacts 203 at the bottom of the hollow pressure rod 2 coincide with the resistive body of the alloy resistor, the sliding stops. For example Figure 4As shown, in this embodiment, it is important to note that the protrusion 201 is made of a metal material that can be attracted by a magnet. A magnetic strip is provided within the groove. During the sliding process of the hollow pressure rod 2, the hollow pressure rod 2 is slightly pulled upwards, creating a certain gap between the bottom contact 203 and the alloy resistor. This prevents direct contact during the sliding process and avoids interfering with the position of the alloy resistor itself. After sliding to the designated position, the hollow pressure rod 2 is released, and the magnetic strip attracts the protrusion 201 and the hollow pressure rod 2, causing them to fall and remain fixed in that position until the contact 203 abuts against the alloy resistor. On the resistor body, a certain downward pressure is applied to the alloy resistor body using the antenna 203, thereby firmly pressing it onto the surface of the electrode plate to prevent positional displacement due to vibration during the reset process of the tooling clamp 103. Once all the tooling clamps 103 are reset, the door can be closed to seal the vacuum chamber 101. A glass panel observation port is provided on the door for real-time observation of the vacuum chamber 101. Subsequently, the vacuum chamber 101 is evacuated through the vacuum system inside the electron beam welding machine body 1 to achieve a preset vacuum level. This evacuation process is existing technology.

[0031] In this embodiment, as Figure 5 , Figure 6 , Figure 7 and Figure 8 As shown, the inert gas output assembly 3 includes two symmetrically distributed first pipes 301. The front end of each first pipe 301 is connected to a second pipe 302. The two first pipes 301 are fixedly connected to each other through two ports of a three-way pipe. The remaining port of the three-way pipe is fixedly connected to a flexible hose 303. The end of the flexible hose 303 is fixedly connected to a main gas pipe 305 through a rigid connector 304. The flexible hose 303, the rigid connector 304 and the main gas pipe 305 are interconnected. A limiting plate is fixedly connected to the upper surface of the tooling clamp 103. The limiting plate has a sliding groove for the rigid connector 304 to slide. Both first pipes 301 are slidably connected to slide rods 306. One end of slide rod 306 is fixedly connected to rigid connector 304, and the other end of slide rod 306 is fixedly connected to hydraulic telescopic rod. The top of slide rod 306 is fixedly connected to the outer shell of electron beam welding gun 102 through connecting rod 7. The hydraulic telescopic rod includes an outer tube 307, a piston 308 is slidably connected to the inner wall of the outer tube 307, a connecting rod 309 is fixedly connected to one side of the piston 308, and a circular connecting block 3010 is fixedly connected to the other side of the piston 308. The circular connecting block 3010 has a hollow internal structure. Several through slots are provided on the side wall of the circular connecting block 3010. The end of the second pipe 302 passes through the front end face of the outer pipe body 307 and is connected to the cavity of the circular connecting block 3010. One end of the connecting rod 309 passes through the end face of the outer pipe body 307. A return spring 3011 is fixedly connected between the connecting rod 309 and the outer pipe body 307. The return spring 3011 is located outside the outer pipe body 307. An oil pipe 3012 is fixedly inserted into the side wall of the outer pipe body 307. It should be noted that after the alloy resistor is assembled, oil is supplied to the outer tube 307 through the oil pipe 3012. The other end of the oil pipe 3012 passes through the bottom of the vacuum chamber 101 and is equipped with a hydraulic pump and a cylinder. The hydraulic pump draws hydraulic oil and injects it into the outer tube 307. Under the pressure of the hydraulic oil, the piston 308 is squeezed and slides towards the front end of the outer tube 307, and at the same time pushes the circular connecting block 3010 and the second pipe 302 to move synchronously until the second pipe 302 is connected to the first pipe 301. During this process, the connecting rod 309 slides synchronously towards the inside of the outer tube 307, and the return spring 3011 is compressed to store elastic potential energy. Next, close the hatch, evacuate the vacuum chamber 101, and fix the top connecting rod 7 of the slide rod 306 to the outer shell of the electron beam welding gun 102 to ensure that the entire inert gas output assembly 3 moves synchronously to each area with the electron beam welding gun 102 to perform welding operations on the contact ends of the alloy resistors on each electrode plate. Specifically, the operation of the inert gas output component 3 is mainly divided into an extraction stage and an exhaust stage, which operate alternately. The specific operation process is as follows: Evacuation Phase: After evacuation in vacuum chamber 101, the hydraulic pump is started, establishing a negative pressure suction circuit through oil pipe 3012. This reverses the flow of hydraulic oil from the outer tube 307 chamber back into the cylinder. As the hydraulic oil is discharged, the hydraulic pressure inside the outer tube 307 chamber decreases, releasing the elastic potential energy of the return spring 3011, which then enters its reset stroke. The return spring 3011 pushes the piston 308 to slide along the inner wall of the outer tube 307 towards the end of the outer tube 307. The circular connecting block 3010, fixed to the piston 308, moves synchronously in this direction. The second pipe 302 moves axially. Since a sealing ring is provided at the interface between the second pipe 302 and the outer pipe body 307, the sealing environment inside the outer pipe body 307 is maintained during the sliding process of the second pipe 302. As the piston 308 moves backward, the cavity volume of the first half of the outer pipe body 307 increases, forming a negative pressure. This negative pressure is drawn into the cavity inside the circular connecting block 3010 through the through groove. This negative pressure is connected to the second pipe 302 through the circular connecting block 3010, resulting in a negative pressure inside the second pipe 302. At the same time, the main inert gas delivery channel, consisting of the hose 303, rigid connector 304, and main gas pipe 305, also begins to operate simultaneously. The end of the main gas pipe 305 extends to the outside of the vacuum chamber 101 and connects to the inert gas storage tank. A solenoid valve is installed at the outlet of the storage tank. When the second pipe 302 separates from the first pipe 301, the solenoid valve opens. The inert gas enters the two first pipes 301 sequentially through the main gas pipe 305, rigid connector 304, hose 303, and tee pipe, and is continuously output from its front end opening. Synchronized with the evacuation of the second pipe 302, a directional airflow is formed. While the second pipe 302 evacuates and moves backward, it provides directional guidance for the inert gas path, ensuring that the subsequent inert gas can accurately and efficiently cover the welding area. As the second pipe 302 moves backward, when the second pipe 302 coincides with the position of the last alloy resistor in space, the solenoid valve closes, completing the pre-filling of inert gas for a single welding area. During the output process, the inert gas forms an airflow jet and gradually diffuses into the surrounding low-pressure environment. Before the formal welding begins, this process can form a continuous and stable inert gas protective layer in the welding area, effectively isolating residual air. During the welding process, even if the oxide film on the outside of the material breaks due to high temperature and releases a small amount of oxygen molecules, it will be quickly diluted and carried away by the continuously flowing inert gas, avoiding the accumulation of oxygen molecules near the weld to form oxidation defects. This reduces the risk of weld oxidation from the root and ensures welding quality. Exhaust stage: After the first group of welding is completed, when the electron beam welding gun 102 moves to the next group, the connecting rod 7 drives the entire inert gas output assembly 3 to move synchronously. During the movement, the rigid connector 304 slides along the limiting groove on the limiting plate until it moves above the next group of alloy resistors. The hydraulic pump starts again and resumes oil supply. The hydraulic oil is reinjected into the outer tube 307 cavity through the oil pipe 3012. The oil pressure pushes the piston 308 to slide forward against the elastic force of the return spring 3011. The circular connecting block 3010 then drives the second pipe 302 to move forward step by step. At this time, since the cavity in the first half of the outer tube 307 has stored some inert gas during the evacuation stage, as the piston 308 moves forward, the cavity volume decreases linearly and the internal gas pressure increases. Under the action of the pressure difference, the stored inert gas is directionally ejected through the vent hole on the inner wall of the second pipe 302. As the second pipe 302 moves forward and is discharged, an airflow jet is formed again. The inert gas gradually diffuses into the welding area of ​​the second alloy resistor, forming a new gas protective layer, which is ready for the next welding operation. During the process of the second pipe 302 moving forward to reconnect with the first pipe 301, the solenoid valve remains closed until the electron beam welding gun 102 moves to the third welding area. This alternating operation creates a stable gas shield for the current workstation during the extraction phase and a gas shield for the next workstation during the exhaust phase, utilizing residual gas to ensure that each welding point is under a tight cover of inert gas before operation. Whether in the extraction or exhaust phase, a continuous airflow is formed to provide protection before welding. This alternating extraction and exhaust operation mode achieves closed-loop recovery and reuse of inert gas, significantly reducing the ineffective loss of inert gas and lowering the cost of welding consumables.

[0032] Furthermore, in this embodiment, the slide bar 306 serves as a rigid support member connecting the rigid connector 304 and the outer tube 307. Its two ends are fixedly connected to the outer wall of the rigid connector 304 and the outer wall of the outer tube 307, respectively. The slide bar 306 can also provide a sliding path for the sliding of the first pipe 301 and the second pipe 302. According to the layout of the alloy resistors, the positions of the first pipe 301 and the second pipe 302 are reasonably adjusted to ensure that when the second pipe 302 moves backward, the coverage area of ​​the inert gas includes all the alloy resistors.

[0033] In this embodiment, as Figure 9 As shown, the top of the movable block 4 is fixedly connected to the outer tube 307 by two clamping blocks. The movable block 4 has a cavity inside. The inner side of the movable block 4 has a connection interface 5. The movable block 4 is connected to the hollow pressure rod 2 through the connection interface 5. An exhaust pipe 6 is inserted into the outer side of the movable block 4.

[0034] It should be noted that the cavity inside the moving block 4 serves as a transfer space for the recovery of inert gas. After the inert gas forms a protective layer in the welding area and completes pre-filling, the moving block 4 simultaneously starts the recovery function as the electron beam welding gun 102 begins welding. Since the inner side of the moving block 4 has an interface 5, which is aligned with the opening of the hollow pressure rod 2, and the other end of the hollow pressure rod 2 is a sealed structure, and several micro holes 202 are opened on both side walls, the exhaust pipe 6 inserted on the outside of the moving block 4 is used to recover residual gas. The end of the exhaust pipe 6 extends to the outside of the vacuum chamber 101 and is equipped with an independent vacuum generator. The vacuum generator is started at the same time as the welding operation, and the air inside the cavity of the moving block 4 is evacuated through the exhaust pipe 6 to form a negative pressure environment. At this time, the inert gas around the welding area is drawn in by the vacuum generator and enters the hollow pressure rod 2 through the micro holes 202 on both sides of the hollow pressure rod 2. The inert gas entering the hollow pressure rod 2 will flow along its internal channel to the cavity of the moving block 4, and finally be extracted from the vacuum chamber 101 through the exhaust pipe 6. Welding and recycling are synchronized. On the one hand, it avoids the irregular diffusion of residual inert gas in the vacuum chamber 101. On the other hand, through continuous extraction, the trace impurity gas generated by the high temperature evaporation of the material during the welding process can be carried out, further purifying the welding environment. In addition, it should be noted that as the inert gas flows, a directional airflow field is formed in the welding area. This airflow field can carry away some of the heat generated during welding in a timely manner, playing an auxiliary role in cooling. This allows the temperature of the weld area to gradually decrease during solidification, forming preliminary cooling and reducing defects such as coarse grains or hot cracks caused by local overheating.

[0035] Furthermore, in this embodiment, the top of the moving block 4 is fixedly connected to the outer tube 307 by two clamping blocks. The moving block 4 can slide along the first side plate 104. The moving block 4 moves synchronously with the inert gas conveying component. When performing multi-group alloy resistance welding operations, as the electron beam welding gun 102 moves backward along the linear slide rail, the inert gas output component 3 moves synchronously, thereby driving the moving block 4 to move synchronously until the inert gas conveying component docks with the next group of alloy resistors. At this time, the interface 5 also docks with the next hollow pressure rod 2. In addition, the front opening area of ​​interface 5 is small and the rear opening area is large. When docking with the hollow pressure bar 2, the front opening has a limited coverage area and can only draw in the inner cavity of the hollow pressure bar 2. This ensures that the inert gas can only enter the hollow pressure bar 2 from the welding area through the micro hole 202, rather than flowing directly from the outside into the interior of the moving block 4. This structural design makes the recovery path of the inert gas clearer. In this embodiment, the hydraulic pump, the solenoid valve's working process, and the electron beam welding gun 102 welding technology are all existing technologies, so they will not be elaborated on further.

[0036] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An electron beam welding apparatus for alloy resistance processing, comprising an electron beam welding machine body (1), wherein the electron beam welding machine body (1) includes a vacuum chamber (101), and an electron beam welding torch (102) and a tooling clamp (103) are installed in the inner cavity of the vacuum chamber (101), characterized in that: It also includes several hollow pressure rods (2) that are slidably connected to the upper surface of the tooling clamp (103), and an inert gas output assembly (3) located directly above the tooling clamp (103). The inert gas output assembly (3) can move horizontally synchronously with the electron beam welding gun (102) and can output inert gas to the contact ends of the alloy resistors so that a gas protective layer is formed in the welding area before the welding operation. The front end of the hollow pressure bar (2) is attached to a movable block (4), which is used to recover the inert gas, and the recovery process is synchronized with the welding operation.

2. The electron beam welding apparatus for alloy resistance processing according to claim 1, characterized in that: One side of the tooling clamp (103) is bent upward to form a first side plate (104). The other side of the tooling clamp (103) is slidably connected to a second side plate (105). The inner wall of the tooling clamp (103) is provided with a slotted loading position, and a lead screw (106) is rotatably connected in the slotted loading position. The lead screw (106) is threaded to a slider. The slider is fixedly connected to the bottom of the second side plate (105). Both the first side plate (104) and the second side plate (105) are provided with straight sliding grooves, and the bottom of the inner wall of the straight sliding grooves is provided with grooves. Both ends of the hollow pressure rod (2) are fixedly connected with protrusions (201), and the protrusions (201) are respectively inserted into the corresponding grooves.

3. The electron beam welding apparatus for alloy resistance processing according to claim 1, characterized in that: The hollow pressure rod (2) has several micro holes (202) on both sides, and several tentacles (203) are fixedly connected to the bottom of the hollow pressure rod (2). The end of the hollow pressure rod (2) near the moving block (4) is set as an open structure, and the other end of the hollow pressure rod (2) is set as a sealed structure.

4. The electron beam welding apparatus for alloy resistance processing according to claim 1, characterized in that: The inert gas output component (3) includes two symmetrically distributed first pipes (301), each of which has a second pipe (302) inserted at its front end. The two first pipes (301) are fixedly connected to each other through two ports of a three-way pipe. The remaining port of the three-way pipe is fixedly connected to a flexible hose (303). The end of the flexible hose (303) is fixedly connected to a main gas pipe (305) through a rigid connector (304). The flexible hose (303), the rigid connector (304), and the main gas pipe (305) are interconnected. A limiting plate is fixedly connected to the upper surface of the tooling clamp (103). The limiting plate has a sliding groove for the rigid connector (304) to slide.

5. The electron beam welding apparatus for alloy resistance machining according to claim 4, characterized in that: Both of the first pipes (301) are slidably connected to a slide rod (306). One end of the slide rod (306) is fixedly connected to a rigid connector (304), and the other end of the slide rod (306) is fixedly connected to a hydraulic telescopic rod. The top of the slide rod (306) is fixedly connected to the outer shell of the electron beam welding gun (102) through a connecting rod (7).

6. The electron beam welding apparatus for alloy resistance processing according to claim 5, characterized in that: The hydraulic telescopic rod includes an outer tube (307), a piston (308) is slidably connected to the inner wall of the outer tube (307), a connecting rod (309) is fixedly connected to one side of the piston (308), and a circular connecting block (3010) is fixedly connected to the other side of the piston (308).

7. The electron beam welding apparatus for alloy resistance machining according to claim 6, characterized in that: The circular connecting block (3010) has a hollow cavity structure inside. The side wall of the circular connecting block (3010) has several through grooves. The end of the second pipe (302) passes through the front end face of the outer pipe body (307) and is connected to the cavity of the circular connecting block (3010). One end of the connecting rod (309) passes through the end face of the outer pipe body (307). A return spring (3011) is fixedly connected between the connecting rod (309) and the outer pipe body (307), and the return spring (3011) is located outside the outer pipe body (307). An oil pipe (3012) is fixedly inserted into the side wall of the outer pipe body (307).

8. The electron beam welding apparatus for alloy resistance processing according to claim 6, characterized in that: The top of the movable block (4) is fixedly connected to the outer tube body (307) by two clamping blocks. The movable block (4) has a cavity inside. The inner side of the movable block (4) has a connecting interface (5). The movable block (4) is connected to the hollow pressure rod (2) through the connecting interface (5). An exhaust pipe (6) is inserted into the outer side of the movable block (4).

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