Long welding seam symmetric segmented welding process and equipment for tailor welding of liquid cooling case

Abstract

The invention discloses a long weld joint symmetric segmented welding process and equipment for liquid cooling case tailor welding, and relates to the technical field of welding, the equipment comprises a vacuum box, a clamp is mounted at the bottom position in the vacuum box, a case body is clamped on the inner side of the clamp, a segmented welding mechanism is arranged in the vacuum box, and the segmented welding mechanism is connected with the vacuum box. The segmented welding mechanism comprises a vacuum pump and an electron beam welding part, the vacuum pump is installed on the surface of the vacuum box, one end of the vacuum pump communicates with the vacuum box through a pipeline, and the electron beam welding part is arranged in the vacuum box; the welding deformation of the liquid cooling case can be obviously reduced, the subsequent shape correcting procedure is reduced, the segmented welding sequence can be determined according to the tilting degree of the to-be-welded face, the warped edge of the to-be-welded position can be flattened, the production efficiency and the product quality reliability are improved, and the method is particularly suitable for high-precision welding processes such as vacuum electron beam welding.

Description

Technical Field

[0001] This invention relates to the field of welding technology, and in particular to a symmetrical segmented welding process and equipment for welding long weld seams in liquid-cooled chassis assembly. Background Technology

[0002] In the manufacturing of liquid-cooled enclosures for high-power electronic devices, a common process involves welding together multiple independent liquid-cooled plates (with internally machined flow channels) to form a complete enclosure. Vacuum electron beam welding, due to its advantages such as high energy density, large weld depth-to-width ratio, and small heat-affected zone, is frequently used for such demanding sealing welds.

[0003] However, the following are the main technical challenges encountered during the splicing and welding process: 1. Large welding deformation: The chassis is composed of four cold-rolled steel plates, and the welds between the cold-rolled steel plates are relatively long. When welding the long side welds, the continuous and concentrated heat input during welding will generate significant residual stress and uneven thermal shrinkage, causing uncontrollable deformations such as twisting and angular deformation of the entire chassis structure.

[0004] 2. Difficulty in subsequent correction: Deformation after welding often requires correction by mechanical fitting. The correction process is not only time-consuming and labor-intensive, increasing costs, but more seriously, improper correction force may cause hidden damage to high-quality electron beam welds, such as microcracks, threatening the long-term sealing reliability of the weld.

[0005] 3. Affects machining accuracy: Deformed chassis will directly affect the precision of subsequent finishing and assembly with cover plates or other components, resulting in a decrease in product qualification rate.

[0006] In existing technologies, although tooling fixtures are commonly used for rigid fixation, they can only suppress deformation to a certain extent and cannot fundamentally solve the deformation problem caused by the generation and release of welding stress. There is a lack of effective and dedicated methods for actively offsetting and reducing stress deformation by optimizing the welding process itself, especially the welding sequence. Summary of the Invention

[0007] This application provides a symmetrical segmented welding process and equipment for welding long weld seams in liquid-cooled chassis, which solves the problems of large welding deformation, difficult subsequent correction, and impact on processing accuracy in the prior art. It can significantly reduce welding deformation of liquid-cooled chassis, reduce subsequent correction processes, improve production efficiency and product quality reliability, and is particularly suitable for high-precision welding processes such as vacuum electron beam welding.

[0008] This application provides a symmetrical segmented welding process and equipment for long weld seams in liquid-cooled chassis assembly, including a vacuum chamber. A control panel is mounted on the surface of the vacuum chamber. A clamp is mounted at the bottom of the vacuum chamber, and the chassis body is clamped on the inner side of the clamp. A segmented welding mechanism is provided inside the vacuum chamber. The segmented welding mechanism includes a vacuum pump and an electron beam welding section. The vacuum pump is mounted on the surface of the vacuum chamber. The input end of the vacuum pump is electrically connected to the output end of the control panel. One end of the vacuum pump is connected to the vacuum chamber through a pipe. An electron beam welding section is provided inside the vacuum chamber and is controlled by the control panel.

[0009] Preferably, the segmented welding mechanism further includes a movable slide and a linear module. Linear modules are installed on the inner walls of both sides of the vacuum chamber. The linear modules are controlled by a control panel. A movable slide is installed between the linear modules. The control panel controls the linear modules to drive the movable slide to move back and forth in a linear motion.

[0010] Preferably, the segmented welding mechanism further includes an arc-shaped through groove, a servo motor, an adjusting slide frame, and a rotating frame. The surface of the movable slide has an arc-shaped through groove, and the vertical plane where the center of the arc-shaped through groove is located is the same vertical plane as the vertical plane where the central axis of the chassis is located. A rotating frame is rotatably connected to the center of the surface of the movable slide, and the rotating frame is concentric with the arc-shaped through groove. A servo motor is installed at the bottom of the movable slide, and the input end of the servo motor is electrically connected to the output end of the control panel. The output end of the servo motor is fixed to a rotating shaft through a coupling, and one end of the rotating shaft is fixedly connected to the rotating end of the rotating frame. An adjusting slide frame is slidably fitted on the surface of the rotating frame, and the adjusting slide frame is installed and fixed to one side of the electron beam welding part by screws. The top of the adjusting slide frame is locked to the rotating frame by screws.

[0011] Preferably, a lidar is provided on both sides of the top of the chassis, the input end of the lidar is electrically connected to the output end of the control panel, and the lidar is installed on both sides of the bottom of the movable slide by screws.

[0012] Preferably, a flattening mechanism is provided in front of the electron beam welding section. The flattening mechanism includes an electric push rod, a bracket, and a pressure roller. An electric push rod is installed on one side of the electron beam welding section. The electric push rod is located in front of the electron beam welding section. The input end of the electric push rod is electrically connected to the output end of the control panel. A bracket is fixed to the bottom of the electric push rod. The electric push rod drives the bracket to move up and down in a linear motion. A pressure roller is rotatably connected to one side of the bottom of the bracket. The pressure roller is located at the edge of the top of the chassis.

[0013] Preferably, the flattening mechanism further includes a slide rod, a positioning plate, and a return spring. The slide rod is slidably disposed inside one side of the bracket, and the slide rod is located above the side of the chassis. One end of the slide rod extends to the bottom of the bracket and is embedded with a ball bearing to facilitate the movement of the slide rod along the top of the side of the chassis. The other end of the slide rod extends to the top of the bracket. The surface of the slide rod is fitted with a positioning plate, which slides in cooperation with the interior of the bracket. A return spring is fitted on the outside of the slide rod, and the two ends of the return spring are fixedly connected to the top of the positioning plate and the inner wall of the bracket, respectively. Under normal conditions, the return spring pushes the positioning plate to the bottom of the bracket.

[0014] Preferably, the flattening mechanism further includes an alarm plate and an alarm. The alarm plate is installed on the top of the slide bar, and the alarm is installed on the top of the bracket via a support frame. The input end of the alarm is electrically connected to the output end of the control panel. The alarm and the alarm plate are in contact and cooperate. When the alarm plate contacts the alarm, the bottom of the ball bearing at the bottom of the slide bar and the bottom of the pressure roller are on the same horizontal plane.

[0015] Preferably, a pressing mechanism is provided on one side of the flattening mechanism. The pressing mechanism includes a pressing roller, a toothed plate, and a slide groove. The slide groove is opened on one side of the bracket. The toothed plate is slidably arranged inside the slide groove. The pressing roller is arranged below the toothed plate. The support shaft of the pressing roller is detachably connected to the toothed plate by screws. One side of the pressing roller is tightly fitted with the side of the machine housing.

[0016] Preferably, the clamping mechanism further includes a rack and a gear. The rack is embedded on one side at the top of the slide rod, and a gear is provided between the rack and the gear plate. The gear meshes with the rack and the gear plate respectively, and the gear is rotatably connected to the top of the bracket through a support frame.

[0017] A symmetrical segmented welding process for long weld seams in liquid-cooled chassis assembly, coupled with the aforementioned symmetrical segmented welding equipment for long weld seams in liquid-cooled chassis assembly, the process comprising: S1. Pre-treatment and assembly: Clean each liquid cooling plate that has completed the internal flow channel manufacturing and testing before welding, and assemble and position it into a chassis using a fixture. Then adjust the position of the electron beam welding part so that the electron beam emitted by the electron beam welding part is directly facing the weld. S2. Spot welding fixation: The vacuum chamber is evacuated, and then the electron beam welding part is used to weld along the two parallel long sides of the chassis to be welded, and spot welding is performed at even intervals. S3. Symmetrical segmented welding: After completing all spot welding, perform formal welding of the long side welds. For any pair of parallel long side welds on the chassis, perform symmetrical segmented welding: divide a single long side weld into N equal segments, where N is an even number; weld the corresponding segments on the two parallel welds in a symmetrical and alternating order. S4. Following the symmetrical segmented welding method in step S3, complete the welding of the other pairs of parallel long side welds on the chassis in sequence.

[0018] One or more technical solutions provided in this application have at least the following technical effects or advantages: By employing a segmented welding mechanism, the liquid cooling plates, which have already undergone internal flow channel manufacturing and testing, are pre-welded cleaned and assembled into a chassis using fixtures. The position of the electron beam welding unit is then adjusted so that the electron beam emitted by the unit is directly aligned with the weld seam. A vacuum chamber is then evacuated, and the electron beam welding unit performs evenly spaced tack welding along the two parallel long sides of the chassis to be welded. After all tack welding is completed, the formal welding of the long side welds is performed. For any pair of parallel long side welds on the chassis, a symmetrical segmented welding operation is executed: [The text abruptly ends here, likely due to an incomplete sentence or missing information.] Divided into N segments, where N is an even number; in a symmetrical and alternating order, corresponding segments on two parallel welds are welded sequentially. That is, after welding the i-th segment on the first weld, the i1-th segment is immediately welded on the second weld, and then the process is repeated on the first weld until all segments are welded. This effectively solves the problems of large welding deformation, difficult subsequent correction, and impact on processing accuracy in the existing technology. It can significantly reduce the welding deformation of liquid-cooled chassis, reduce subsequent correction processes, improve production efficiency and product quality reliability, and is particularly suitable for high-precision welding processes such as vacuum electron beam welding. By employing a lidar, the distance to the entire surface of the chassis to be welded can be detected. When the electron beam welding unit is welding a section of the chassis edge, the lidar can measure the distance to the entire top surface of the chassis and transmit the measurement value to the control panel. The section with the smallest value is the section with the highest warp. After this section is welded, the control panel can control the electron beam welding unit to move to the section with the highest warp and continue welding. This effectively solves the problem in the existing technology that welding equipment cannot easily determine the segmented welding sequence based on the size of the warp. By employing a flattening mechanism and a clamping mechanism, when the electron beam welding section moves to the welding position, the sliding rod, under the elastic force of the return spring, is positioned below the pressure roller. At this time, the control panel controls the electric push rod to operate, causing the electric push rod to drive the bracket downwards, making the pressure roller contact the raised part of the top plate of the chassis. Subsequently, the electric push rod pushes the bracket downwards, causing the pressure roller to press down against the raised part. Simultaneously, the sliding rod contacts the top of the side plate of the chassis, and the top of the side plate is not raised and remains in a horizontal state. As the electric push rod continues to push the bracket downwards, the sliding rod drives the positioning plate to push upwards along the inside of the bracket, causing the alarm plate to move upwards synchronously. When the alarm plate is activated... When the alarm trigger moves to contact the alarm, the alarm sounds and transmits the signal to the control panel. Upon receiving the signal, the control panel stops the electric push rod. Since the bottom of the sliding rod and the bottom of the pressure roller are on the same horizontal plane when the alarm trigger contacts the alarm, the raised part of the top plate of the chassis is on the same horizontal plane as the top of the side plate of the chassis. Subsequently, the bracket moves back and forth with the electron beam welding part, driving the pressure roller to move synchronously and flattening the raised edge of the chassis to be welded. After this section is welded, the electric push rod is controlled to reset, so that the sliding rod and the pressure roller are away from the chassis. At this time, the sliding rod is reset under the elastic force of the return spring.

[0019] Simultaneously, as the positioning plate moves upward along the inside of the bracket, the gear slides along the rack. Under the meshing action of the gear and rack, the gear rotates. Under the meshing action of the gear and the toothed plate, the toothed plate slides downward along the slide groove, causing the pressing roller to move downward synchronously, so that the pressing roller contacts the side plate of the chassis and presses the side plate of the chassis tightly, making the connection between the side plate and the top plate of the chassis more tight. At the same time, since the pressing roller has a roller-shaped structure, it is convenient for the pressing roller to move back and forth along the side plate of the chassis with the electron beam welding part. Since the support shaft of the pressing roller is connected to the bottom position of the toothed plate by screws, it is convenient to adjust the position of the pressing roller according to the different thicknesses of the side plate of the chassis, so that the surface of the pressing roller is always in close contact with the side plate of the chassis. This effectively solves the problem in the existing technology that can only detect the height of the warp to determine the welding sequence, but the next section is still in a warp state when welding the next section. It can flatten the warp at the weld joint and improve the welding effect of the welding equipment. Attached Figure Description

[0020] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a three-dimensional cross-sectional structural diagram of the present invention; Figure 3 This is a schematic diagram of the front cross-sectional structure of the present invention; Figure 4 This is a top view cross-sectional structural diagram of the present invention; Figure 5 This is an enlarged structural diagram of the flattening mechanism of the present invention in its working state; Figure 6This is an enlarged structural diagram of the flattening mechanism of the present invention in its normal state; Figure 7 This is an enlarged structural schematic diagram of the clamping mechanism of the present invention; Figure 8 This is a top-enlarged structural diagram of the chassis after spot welding of the present invention. Figure 9 This is a schematic diagram of the symmetrical segmented welding sequence structure of the present invention.

[0021] In the diagram: 1. Vacuum chamber; 11. Control panel; 12. Fixture; 13. Chassis; 2. Segmented welding mechanism; 21. Vacuum pump; 22. Moving slide; 23. Linear module; 24. Electron beam welding section; 25. Arc-shaped through groove; 26. Servo motor; 27. Adjusting slide frame; 28. Rotating frame; 3. LiDAR; 4. Flattening mechanism; 41. Electric push rod; 42. Bracket; 43. Pressure roller; 44. Slide rod; 45. Positioning plate; 46. Return spring; 47. Alarm plate; 48. Alarm; 5. Clamping mechanism; 51. Clamping roller; 52. Rack; 53. Toothed plate; 54. Slide groove; 55. Gear. Detailed Implementation

[0022] To facilitate understanding of the present invention, a more complete description of this application will be given below with reference to the accompanying drawings, which illustrate preferred embodiments of the invention. However, the invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to enable a more thorough and complete understanding of the disclosure of the present invention.

[0023] It should be noted that the terms "vertical," "horizontal," "up," "down," "left," "right," and similar expressions used in this article are for illustrative purposes only and do not represent the only possible implementation.

[0024] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains; the terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to limit the invention; the term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0025] Example 1: As Figure 1 and Figure 2As shown, this application discloses a symmetrical segmented welding device for long weld seams of liquid-cooled chassis, comprising a vacuum chamber 1. A control panel 11 is mounted on the surface of the vacuum chamber 1. A lithium battery and a processor are embedded inside the control panel 11. The processor includes an amplifier tube, a protective resistor Rm, a filter, an A / D converter, and a microcontroller. A sensor and a protective resistor Rm are connected in parallel with the amplifier tube and then in series with the filter. The signal is converted by the A / D converter and sent to the microcontroller. A display screen receives the processing signals from the microcontroller. A clamp 12 is installed at the bottom of the vacuum chamber 1. The inner side of the clamp 12 holds the chassis 13. The chassis 13 consists of a bottom plate, two side plates, and a top plate, totaling four sections with internal liquid cooling components. The vacuum chamber 1 is constructed from aluminum alloy plates assembled from cold runners. An internal segmented welding mechanism 2 is installed, comprising a vacuum pump 21 and an electron beam welding section 24. The vacuum pump 21 is mounted on the surface of the vacuum chamber 1, and its input is electrically connected to the output of the control panel 11. One end of the vacuum pump 21 is connected to the vacuum chamber 1 via a pipe. A ventilation valve is installed at the top of the vacuum chamber 1, comprising a ventilation pipe and a ventilation valve mounted on the surface of the ventilation pipe. A vacuum pressure gauge connected to the top of the vacuum chamber 1 is installed to facilitate real-time monitoring of the vacuum level inside the vacuum chamber 1, ensuring that the vacuum chamber 1 meets the requirements for vacuum welding.

[0026] Furthermore, such as Figure 3 and Figure 4As shown, the vacuum chamber 1 is equipped with an electron beam welding unit 24 for vacuum electron beam welding of the chassis 13. The electron beam welding unit 24 is controlled by a control panel 11. The segmented welding mechanism 2 also includes a movable slide 22 and a linear module 23. Linear modules 23 are installed on the inner walls of both sides of the vacuum chamber 1. The linear modules 23 are controlled by the control panel 11. A movable slide 22 is installed between the linear modules 23. The control panel 11 controls the linear modules 23 to drive the movable slide 22 to move back and forth in a linear motion. The segmented welding mechanism 2 It also includes an arc-shaped through groove 25, a servo motor 26, an adjusting slide frame 27, and a rotating frame 28. The surface of the movable slide 22 is provided with an arc-shaped through groove 25. The vertical plane where the center of the arc-shaped through groove 25 is located is the same vertical plane as the vertical plane where the central axis of the chassis 13 is located. Therefore, when the initial position of the electron beam welding part 24 is directly above the weld seam on one side of the chassis 13, after the servo motor 26 drives the electron beam welding part 24 to rotate 180 degrees along the arc-shaped through groove 25, the electron beam welding part 24 is located directly above another weld seam on the chassis 13 that is parallel to it. To facilitate the electron beam welding unit 24 in welding the two parallel weld seams on the top of the housing 13, a rotating frame 28 is rotatably connected at the center of the surface of the movable slide 22. The rotating frame 28 is concentric with the arc-shaped through groove 25. A servo motor 26 is installed at the bottom of the movable slide 22. The servo motor 26 can be an SZ series model. The input end of the servo motor 26 is electrically connected to the output end of the control panel 11. The output end of the servo motor 26 is fixed to a rotating shaft through a coupling. One end of the rotating shaft is fixedly connected to the rotating end of the rotating frame 28. The surface of the rotating frame 28 is slidably fitted with an adjusting slide frame 27. The adjusting slide frame 27 is installed and fixed to one side of the electron beam welding part 24 by screws. The top of the adjusting slide frame 27 is locked to the rotating frame 28 by screws. The surface of the adjusting slide frame 27 is threaded with screws. One end of the screw passes through the adjusting slide frame 27 and is pressed and fastened to the surface of the rotating frame 28, so as to facilitate the adjustment of the position of the electron beam welding part 24 to adapt to the chassis 13 of different sizes. During adjustment, the adjusting slide frame 27 is moved so that the electron beam welding part 24 is located directly above the weld.

[0027] The control panel 11 is used to control the coordinated operation of various components of the welding equipment; the electron beam welding unit 24 is used to perform vacuum electron beam welding on the chassis 13, and the model of the electron beam welding unit 24 can be a THDW series vacuum electron beam welding machine; the linear module 23 is used to control the moving slide 22 to perform forward and backward linear movement, and the model of the linear module 23 can be a TOYO series lead screw linear module; all of these are existing technologies and will not be described in detail here.

[0028] Furthermore, such as Figure 8 and Figure 9 As shown in the figure, the symmetrical segmented welding equipment for welding long weld seams of liquid-cooled chassis according to an embodiment of this application operates as follows: S1. Pre-treatment and assembly: The liquid cooling plates, which have completed the internal flow channel manufacturing and testing, are usually four pieces. They are cleaned before welding and assembled into the chassis 13 by the fixture 12. Then, the screws on the surface of the adjusting slide frame 27 are loosened and the electron beam welding part 24 is pushed so that the adjusting slide frame 27 slides along the rotating frame 28, driving the electron beam welding part 24 to move synchronously. The position of the electron beam welding part 24 is adjusted so that the electron beam emitted by the electron beam welding part 24 is directly facing the weld. Then, the screws on the surface of the adjusting slide frame 27 are tightened to fix the adjusting slide frame 27 and the electron beam welding part 24. S2. Spot welding fixation: Close the chamber door to seal the inside of the vacuum chamber 1. Control the vacuum pump 21 through the control panel 11 to evacuate the inside of the vacuum chamber 1. Monitor the vacuum level inside the vacuum chamber 1 in real time through the vacuum pressure gauge installed on the surface of the vacuum chamber 1 to ensure that the vacuum requirement is met. Then, control the welding equipment through the control panel 11. Move the electron beam welding part 24 back and forth through the linear module 23. At the same time, drive the rotating frame 28 to rotate 180 degrees through the servo motor 26. Rotate the electron beam welding part 24 along the arc-shaped through groove 25 to the weld seam on the other side. The electron beam welding part 24 welds the two parallel long sides of the chassis 13 to be welded. Perform spot welding at even intervals. The length and spacing of the spot welding are determined according to the total length of the weld seam and the plate thickness to ensure that there is sufficient connection strength between the cold plates of the chassis 13 and to prevent misalignment in subsequent segmented welding. S3. Symmetrical Segmented Welding: After completing all tack welds, perform the formal welding of the long side welds. For any pair of parallel long side welds on the chassis 13, perform symmetrical segmented welding: divide a single long side weld into N equal segments, where N is an even number; weld the corresponding segments on the two parallel welds in a symmetrical and alternating order; the following strategy can be used for welding: Divide the single long-side weld into N equal segments (N is an even number greater than or equal to 4), and number each segment.

[0029] Start the welding procedure and weld the segments in sequence according to the principle of symmetry and alternation. Specifically, first, weld segment a on the first long side weld, then weld segment a1, which is symmetrical to segment a, on the second long side weld parallel to it; then, return to the first long side weld to weld segment b, and then to the second long side weld to weld segment b1; and so on, until all segments are welded.

[0030] The same electron beam welding process parameters (such as acceleration voltage, beam current, welding speed, etc.) are used for welding each segment.

[0031] S4. Repeat the operation: Following the symmetrical segmented welding method in S3, complete the welding of the other pairs of parallel long side welds on the chassis 13 in sequence.

[0032] For example: Taking the welding of a square aluminum alloy liquid-cooled chassis 13 as an example, the chassis 13 is composed of four liquid-cooled plates: a bottom plate, two side plates, and an end plate, and has two pairs of parallel long-side welds.

[0033] 1.S1: After the four cold plates are thoroughly cleaned, they are assembled and positioned on fixture 12; 2.S2: Perform tack welding on the four long side welds, with 4 tack welds on each weld, each tack weld being approximately 10mm long and evenly spaced.

[0034] 3.S3: First, weld the two parallel long-side welds formed by the base plate and the two side plates (assuming each weld is 600mm long); divide each weld into 6 equal segments (N=6), each segment approximately 100mm long. Number them from left to right as a, b, c, d, e, f and a1, b1, c1, d1, e1, f1; the welding sequence is: segment a, segment a1, segment b, segment b1, segment c, segment c1, segment d, segment d1, segment e, segment e1, segment f, segment f1; the welding parameters for each segment are the same: accelerating voltage 60kV, beam current 25mA, welding speed 10mm / s; 4.S4: Then, using the same symmetrical segmented welding method, weld another pair of parallel long side welds formed by the end plate of the chassis and the bottom plate and side plate; 5. After welding is completed, remove the chassis 13.

[0035] The technical solutions in the above embodiments of this application have at least the following technical effects or advantages: by controlling the distribution of welding heat input in time and space, the stress generated during the welding process can be mutually canceled, which can significantly reduce the welding deformation of the liquid cooling box, reduce subsequent straightening processes, improve production efficiency and product quality reliability, and is particularly suitable for high-precision welding processes such as vacuum electron beam welding. It can also be extended to the application of other high-energy beam welding methods such as laser welding and TIG welding on similar box structures.

[0036] Example 2: In the above examples, when performing symmetrical segmented welding, uneven force can easily cause warping at unwelded areas. Due to the different distances from the welding point, the degree of warping varies from segment to segment, and the welding equipment cannot easily determine the segmented welding sequence based on the degree of warping. This application example is an optimization based on the above examples.

[0037] like Figure 2 and Figure 4As shown, LiDAR 3 is installed on both sides of the top of the chassis 13. The model of LiDAR 3 can be a VF series planar scanning LiDAR. The input end of the LiDAR 3 is electrically connected to the output end of the control panel 11. The LiDAR 3 is installed on both sides of the bottom of the movable slide 22 by screws. The LiDAR 3 can be installed at the corresponding position on the bottom of the movable slide 22 according to the different sizes of the chassis 13. The two LiDAR 3 can detect the distance between the two planes of the top of the chassis 13 near the weld and the LiDAR 3. When performing segmented welding, the parts far from the welding part are prone to warping due to uneven force. The distance between the entire welding surface and the LiDAR 3 can be measured by the LiDAR 3. The greater the warping, the smaller the distance value. The segment with the smallest value can be identified as the next segment to be welded based on the detection value.

[0038] In use, the laser radar 3 can detect the distance to the entire surface of the chassis 13 to be welded. When the electron beam welding unit 24 welds a section of the welding edge of the chassis 13, the laser radar 3 can measure the distance to the entire top surface of the chassis 13 and transmit the measurement value to the control panel 11. The section with the smallest value is the section with the highest warp. After this section is welded, the control panel 11 can control the electron beam welding unit 24 to move to the section with the highest warp and continue welding.

[0039] Specifically, such as Figure 9 As shown, when the electron beam welding unit 24 welds segment a, the lidar 3 detects that segment a1 has the highest warping degree. The electron beam welding unit 24 can weld segment a1 after completing the welding of segment a.

[0040] It should be noted that the welding sequence used in this embodiment may be different from the welding sequence in Embodiment 1.

[0041] The technical solutions in the above embodiments of this application have at least the following technical effects or advantages: when welding in segments, the segment with the highest warping can be determined as the next segment to be welded, and the welding sequence can be determined.

[0042] Example 3: In Example 2 above, only the height of the raised edge can be detected to determine the welding sequence, but when welding the next segment, the next segment is still in a raised edge state; the embodiments of this application are optimized based on the above embodiments.

[0043] like Figure 5 and Figure 6As shown, a flattening mechanism 4 is provided in front of the electron beam welding section 24. The flattening mechanism 4 includes an electric push rod 41, a bracket 42, and a pressure roller 43. The electric push rod 41 is installed on one side of the electron beam welding section 24. The electric push rod 41 can be a TA series model. The electric push rod 41 is located in front of the electron beam welding section 24. The input end of the electric push rod 41 is electrically connected to the output end of the control panel 11. The bracket 42 is fixed at the bottom of the electric push rod 41. The electric push rod 41 drives the bracket 42 to move up and down linearly. The pressure roller 43 is rotatably connected to one side of the bottom of the bracket 42. The pressure roller 43 is located at... At the top edge of the chassis 13, specifically, the surface of one end of the pressure roller 43 and the weld can be on the same vertical plane, which facilitates the initial adjustment of the position of the electron beam welding part 24. During adjustment, first control the electric push rod 41 to drive the pressure roller 43 downward to contact the top plate of the chassis 13, and then adjust the position of the electron beam welding part 24 left and right so that the electron beam welding part 24 drives the pressure roller 43 to move until the surface of one end of it coincides with the weld. The flattening mechanism 4 also includes a slide rod 44, a positioning plate 45 and a return spring 46. The slide rod 44 is slidably arranged inside one side of the bracket 42. The slide rod 44 is located in the chassis. Above the side panel 13, one end of the slide rod 44 extends to the bottom of the bracket 42 and is fitted with a ball bearing to facilitate movement of the slide rod 44 along the top of the side panel 13 of the chassis. The other end of the slide rod 44 extends to the top of the bracket 42. A positioning plate 45 is fitted onto the surface of the slide rod 44, and the positioning plate 45 slides in contact with the interior of the bracket 42. A return spring 46 is fitted onto the outer side of the slide rod 44, and both ends of the return spring 46 are fixedly connected to the top of the positioning plate 45 and the inner wall of the bracket 42, respectively. Under normal conditions, the return spring 46 pushes the positioning plate 45 into the interior of the bracket 42 under the action of its elastic force. At the bottom, the flattening mechanism 4 also includes an alarm plate 47 and an alarm 48. The alarm plate 47 is installed on the top of the slide bar 44, and the alarm 48 is installed on the top of the bracket 42 via a support frame. The model of the alarm 48 can be SZB series. The input end of the alarm 48 is electrically connected to the output end of the control panel 11. The alarm 48 contacts and cooperates with the alarm plate 47. When the alarm plate 47 contacts the alarm 48, the alarm 48 sounds an alarm and transmits a signal to the control panel 11. At the same time, the bottom of the ball bearing at the bottom of the slide bar 44 and the bottom of the pressure roller 43 are on the same horizontal plane.

[0044] Furthermore, such as Figure 7As shown, a pressing mechanism 5 is provided on one side of the flattening mechanism 4. The pressing mechanism 5 includes a pressing roller 51, a toothed plate 53, and a slide groove 54. The slide groove 54 is opened on one side of the bracket 42. The toothed plate 53 is slidably arranged inside the slide groove 54. The pressing roller 51 is arranged below the toothed plate 53. The pressing roller 51 consists of a roller and a support shaft rotatably connected to the roller. The support shaft of the pressing roller 51 is detachably connected to the toothed plate 53 by screws. One side of the pressing roller 51 is tightly fitted to the side of the machine housing 13. The pressing mechanism 5 also includes a rack 52 and a gear 55. The rack 52 is embedded on one side at the top position of the slide rod 44. The gear 55 is arranged between the rack 52 and the toothed plate 53. The gear 55 meshes with the rack 52 and the toothed plate 53 respectively. The gear 55 is rotatably connected to the top of the bracket 42 through the support frame.

[0045] In use, when the electron beam welding section 24 moves to the welding position, the slide rod 44 is positioned below the pressure roller 43 under the elastic force of the return spring 46. At this time, the control panel 11 controls the electric push rod 41 to work, causing the electric push rod 41 to drive the bracket 42 downward, so that the pressure roller 43 contacts the raised part of the top plate of the chassis 13. Then, the electric push rod 41 pushes the bracket 42 downward, so that the pressure roller 43 presses down against the raised part. At the same time, the slide rod 44 contacts the top of the side plate of the chassis 13. The top of the side plate is not raised and is in a horizontal state. When the electric push rod 41 continues to push the bracket 42 downward, the slide rod 44 drives the positioning plate 45 to push upward along the inside of the bracket 42, driving the alarm piece 47 upward synchronously. When the alarm piece 47 moves... When the alarm 47 comes into contact with the alarm 48, the alarm 48 sounds an alarm and transmits the signal to the control panel 11. The control panel 11 receives the signal and controls the electric push rod 41 to stop working. Since the bottom of the slide rod 44 and the bottom of the pressure roller 43 are on the same horizontal plane when the alarm contact plate 47 comes into contact with the alarm 48, the raised part of the top plate of the chassis 13 is on the same horizontal plane as the top of the side plate of the chassis 13. Then the bracket 42 moves back and forth with the electron beam welding part 24, driving the pressure roller 43 to move synchronously and flattening the raised edge of the part to be welded on the chassis 13. After this section is welded, the electric push rod 41 is controlled to reset, so that the slide rod 44 and the pressure roller 43 are away from the chassis 13. At this time, the slide rod 44 is reset under the elastic force of the reset spring 46.

[0046] Meanwhile, when the positioning plate 45 moves upward along the inside of the bracket 42, the gear 55 slides along the rack 52. Under the meshing action of the gear 55 and the rack 52, the gear 55 rotates. Under the meshing action of the gear 55 and the toothed plate 53, the toothed plate 53 slides downward along the slide groove 54, causing the pressing roller 51 to move downward synchronously, so that the pressing roller 51 contacts the side plate of the chassis 13 and presses the side plate of the chassis 13 together, making the connection between the side plate and the top plate of the chassis 13 more tight. At the same time, since the pressing roller 51 is a roller structure, it is convenient for the pressing roller 51 to move back and forth along the side plate of the chassis 13 with the electron beam welding part 24. Since the support shaft of the pressing roller 51 is connected to the bottom position of the toothed plate 53 by screws, it is convenient to adjust the position of the pressing roller 51 according to the different thicknesses of the side plate of the chassis 13, so that the surface of the pressing roller 51 is always in close contact with the side plate of the chassis 13.

[0047] The technical solutions described in the embodiments of this application have at least the following technical effects or advantages: they can flatten the raised edges of the weld joint, thereby improving the welding effect of the welding equipment.

[0048] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. For those skilled in the art, the present invention can have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A symmetrical segmented welding device for long weld seams in liquid-cooled chassis assembly, comprising a vacuum chamber (1), characterized in that: A control panel (11) is installed on the surface of the vacuum chamber (1). A clamp (12) is installed at the bottom of the vacuum chamber (1). The clamp (12) holds the machine housing (13) on its inner side. A segmented welding mechanism (2) is provided inside the vacuum chamber (1). The segmented welding mechanism (2) includes a vacuum pump (21) and an electron beam welding section (24). The vacuum pump (21) is installed on the surface of the vacuum chamber (1). The input end of the vacuum pump (21) is electrically connected to the output end of the control panel (11). One end of the vacuum pump (21) is connected to the vacuum chamber (1) through a pipe. An electron beam welding section (24) is provided inside the vacuum chamber (1). The electron beam welding section (24) is controlled by the control panel (11).

2. The symmetrical segmented welding equipment for long weld seams of liquid-cooled chassis according to claim 1, characterized in that: The segmented welding mechanism (2) also includes a movable slide (22) and a linear module (23). The inner walls on both sides of the vacuum box (1) are equipped with linear modules (23). The linear modules (23) are controlled by the control panel (11). The movable slide (22) is installed between the linear modules (23). The control panel (11) controls the linear modules (23) to drive the movable slide (22) to move back and forth in a linear motion.

3. The symmetrical segmented welding equipment for long weld seams in liquid-cooled chassis assembly according to claim 2, characterized in that: The segmented welding mechanism (2) also includes an arc-shaped through groove (25), a servo motor (26), an adjusting slide frame (27), and a rotating frame (28). The surface of the movable slide (22) is provided with an arc-shaped through groove (25). The vertical plane where the center of the arc-shaped through groove (25) is located is the same vertical plane as the vertical plane where the central axis of the chassis (13) is located. A rotating frame (28) is rotatably connected at the center of the surface of the movable slide (22). The rotating frame (28) is concentric with the arc-shaped through groove (25). The bottom of the movable slide (22) A servo motor (26) is installed, the input end of which is electrically connected to the output end of the control panel (11). The output end of the servo motor (26) is fixed with a rotating shaft by a coupling. One end of the rotating shaft is fixedly connected to the rotating end of the rotating frame (28). An adjusting slide frame (27) is slidably sleeved on the surface of the rotating frame (28). The adjusting slide frame (27) is installed and fixed to one side of the electron beam welding part (24) by screws. The top of the adjusting slide frame (27) is locked to the rotating frame (28) by screws.

4. The symmetrical segmented welding equipment for long weld seams in liquid-cooled chassis assembly according to claim 1, characterized in that: Both sides of the top of the chassis (13) are equipped with laser radar (3). The input end of the laser radar (3) is electrically connected to the output end of the control panel (11). The laser radar (3) is installed on both sides of the bottom of the movable slide (22) by screws.

5. The symmetrical segmented welding equipment for long weld seams in liquid-cooled chassis assembly according to claim 1, characterized in that: A flattening mechanism (4) is provided in front of the electron beam welding section (24). The flattening mechanism (4) includes an electric push rod (41), a bracket (42) and a pressure roller (43). An electric push rod (41) is installed on one side of the electron beam welding section (24). The electric push rod (41) is located in front of the electron beam welding section (24). The input end of the electric push rod (41) is electrically connected to the output end of the control panel (11). A bracket (42) is fixed at the bottom of the electric push rod (41). The electric push rod (41) drives the bracket (42) to move up and down in a straight line. A pressure roller (43) is rotatably connected to one side of the bottom of the bracket (42). The pressure roller (43) is located at the edge of the top of the chassis (13).

6. The symmetrical segmented welding equipment for long weld seams in liquid-cooled chassis assembly according to claim 5, characterized in that: The flattening mechanism (4) also includes a slide rod (44), a positioning plate (45), and a return spring (46). The slide rod (44) is slidably arranged inside one side of the bracket (42). The slide rod (44) is located above the side of the chassis (13). One end of the slide rod (44) extends to the bottom of the bracket (42) and is embedded with a ball bearing to facilitate the slide rod (44) moving along the top of the side of the chassis (13). The other end of the slide rod (44) extends to the top of the bracket (42). The surface of the slide rod (44) is fitted with a positioning plate (45). The positioning plate (45) slides and cooperates with the interior of the bracket (42). The outside of the slide rod (44) is fitted with a return spring (46). The two ends of the return spring (46) are fixedly connected to the top of the positioning plate (45) and the inner wall of the bracket (42), respectively. Under normal conditions, the return spring (46) pushes the positioning plate (45) to the bottom of the interior of the bracket (42).

7. The symmetrical segmented welding equipment for long weld seams in liquid-cooled chassis assembly according to claim 6, characterized in that: The flattening mechanism (4) also includes a trigger plate (47) and an alarm (48). The trigger plate (47) is installed on the top of the slide bar (44), and the alarm (48) is installed on the top of the bracket (42) through a support frame. The input end of the alarm (48) is electrically connected to the output end of the control panel (11). The alarm (48) and the trigger plate (47) are in contact and cooperate. When the trigger plate (47) and the alarm (48) are in contact, the bottom of the ball at the bottom of the slide bar (44) and the bottom of the pressure roller (43) are on the same horizontal plane.

8. The symmetrical segmented welding equipment for long weld seams in liquid-cooled chassis assembly according to claim 5, characterized in that: A pressing mechanism (5) is provided on one side of the flattening mechanism (4). The pressing mechanism (5) includes a pressing roller (51), a toothed plate (53) and a slide groove (54). The slide groove (54) is opened on one side of the bracket (42). The toothed plate (53) is slidably arranged inside the slide groove (54). The pressing roller (51) is arranged below the toothed plate (53). The support shaft of the pressing roller (51) is detachably connected to the toothed plate (53) by screws. One side of the pressing roller (51) is tightly fitted to the side of the housing (13).

9. The symmetrical segmented welding equipment for long weld seams in liquid-cooled chassis assembly according to claim 8, characterized in that: The clamping mechanism (5) also includes a rack (52) and a gear (55). The rack (52) is embedded on one side of the top position of the slide bar (44). A gear (55) is provided between the rack (52) and the toothed plate (53). The gear (55) meshes with the rack (52) and the toothed plate (53) respectively. The gear (55) is rotatably connected to the top of the bracket (42) through the support frame.

10. A symmetrical segmented welding process for long weld seams in liquid-cooled chassis assembly, coupled with the symmetrical segmented welding equipment for long weld seams in liquid-cooled chassis assembly as described in claim 3, characterized in that, The process includes: S1. Pre-treatment and assembly: Clean each liquid cooling plate that has completed the internal flow channel manufacturing and testing before welding, and assemble and position it into a chassis (13) using a fixture (12). Then adjust the position of the electron beam welding part (24) so ​​that the electron beam emitted by the electron beam welding part (24) is directly facing the weld. S2. Spot welding fixation: Vacuum the inside of the vacuum box (1), and then make the electron beam welding part (24) weld along the two parallel long sides of the chassis (13) to be welded, and perform spot welding with uniform intervals. S3. Symmetrical segmented welding: After completing all spot welding, perform formal welding of the long side weld. For any pair of parallel long side welds on the chassis (13), perform symmetrical segmented welding: divide a single long side weld into N equal segments, where N is an even number; weld the corresponding segments on the two parallel welds in a symmetrical and alternating order. S4. Following the symmetrical segmented welding method in step S3, the welding of other pairs of parallel long side welds on the chassis (13) is completed in sequence.

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