Welding process and positioning device for front plate and connecting ring of signal shielding box

Abstract

The invention relates to the field of welding processes, in particular to a welding process and a positioning device for a front plate and a connecting ring of a signal shielding box, which comprises the following steps: firstly, adjusting welding process parameters of welding equipment, placing the front plate in a positioning groove of a positioning tray, and inserting a positioning ring of the connecting ring into a front plate operation hole; the positioning device driving piece drives the rotating base, the three-jaw chuck and the positioning mechanism to enable the front plate and the connecting ring to rotate for welding, then the front plate is turned over, then the remaining connecting ring is welded, and the welding quality is checked. The welding device achieves the effects that the welding quality can be ensured, no crack and deformation are ensured, the welding seam is uniform and firm, meanwhile, the positioning device is reasonable in structure, and the welding work can be effectively assisted.

Description

Technical Field

[0001] This application relates to the field of welding processes, and in particular to a welding process and positioning device for the front plate and connecting ring of a signal shielding box. Background Technology

[0002] Currently, signal shielding boxes, as specialized devices used to isolate or block wireless signal transmission, have wide applications in various fields, including testing of electronic devices (such as mobile phones, tablets, wireless routers, Bluetooth headsets, communication modules, encryption chips, etc.), information security protection, electromagnetic compatibility testing, and scientific research experiments. The core function of a signal shielding box is to construct a signal-shielding area within a specific space through a specific physical structure or advanced technology, thereby effectively blocking the intrusion of external wireless signals and preventing wireless signals within the area from leaking to the outside.

[0003] Reference Figure 1 One type of signal shielding box 1 includes a box body 11, with a cover 12 rotatably mounted on the box body 11. The cover 12 has a through observation port 121, and a transparent observation plate 122 is fixedly mounted at the observation port 121, allowing operators to observe the internal testing conditions without opening the box body 11. The box body 11 includes a front panel 111, with two operating holes 112. These operating holes 112 allow operators to reach into the box body 11 to operate the testing equipment located inside. Simultaneously, two connecting rings 13 are welded to the inner sidewall of the front panel 111, with one end of each connecting ring 13 fixed to the inner sidewall of the front panel 111 by welding. One end of each connecting ring 13 communicates with the operating hole 112, and a flexible electromagnetic shielding sleeve is fitted onto the end of each connecting ring 13 away from the sidewall of the box body 11. The flexible electromagnetic shielding sleeve not only effectively shields the signal but also facilitates the operator's access to the box for operation.

[0004] In the process of welding the connecting ring 13 to the front plate 111, conventional welding parameters are typically used. During welding, a clamping device is used to hold the front plate 111 in place, the equipment rotates the workpiece, and the welding torch remains stationary. As the front plate 111 rotates, the welding torch welds the contact area between the front plate 111 and the connecting ring 13, forming a weld bead. Conventional welding parameters, such as scanning speed, scanning width, and peak power, are used during the welding process. These parameters are usually set based on experience or standard welding procedures. In the relevant technical solutions, the welding path between the connecting ring 13 and the front plate 111 is circular, and this circular path is the weld bead. The welding torch needs to weld this circular path at the contact area between the front plate 111 and the connecting ring 13 to form a complete weld bead.

[0005] In the welding operation, conventional welding parameters are used, and the front plate 111 is clamped using a fixed clamping device. The equipment rotates the workpiece while the welding torch remains stationary. This method has several problems: Firstly, because the welding torch is fixed in position, and the product is prone to deformation after heating, the welding position becomes unstable. When the actual front plate 111 is not a standard plane and may have slight deformation, resulting in a curved surface, the welding torch cannot be flexibly adjusted. This causes the actual welding path to deviate from the original circular weld bead, potentially being too high or too low, making it impossible to accurately align the welding points on the weld bead and severely affecting the welding quality. Secondly, the front plate 111 is clamped during welding and cannot deform freely to release stress, resulting in too much stress remaining unreleased during the welding process. After the fixing of the front plate 111 is released, the internal stress distribution of the front plate 111 is uneven after welding, easily causing cracks and deformation. This makes the welded product prone to cracking, and the deformation is large, seriously affecting the welding quality. Summary of the Invention

[0006] To overcome the above-mentioned technical problems, this application provides a welding process for the front panel and connecting ring of a signal shielding box.

[0007] The welding process between the front panel and the connecting ring of the signal shielding box provided in this application adopts the following technical solution: In a first aspect, this application discloses a welding process between the front panel and the connecting ring of a signal shielding box, comprising the following steps: Step 1: Adjust the welding process parameters of the welding equipment: Step 2: Place the front panel into the positioning slot of the positioning tray; Step 3: Insert the positioning ring of one of the connecting rings into one of the operating holes of the front plate, so that the outer side wall of the positioning ring abuts against the inner side wall of the operating hole, and the bottom end of the positioning ring abuts against the upper surface of the positioning groove. Step Four: The worker holds the welding torch and activates the drive mechanism of the positioning device. The drive mechanism rotates the rotating seat, which in turn rotates the three-jaw chuck. The three-jaw chuck rotates the support rod, which in turn rotates the load-bearing block and positioning tray. The positioning tray then rotates the front plate and connecting ring. During this rotation, the worker holds the welding torch and can flexibly adjust its position according to any possible deformation of the front plate during welding. The position of the welding torch remains relatively stable but can be finely adjusted to ensure it is always aligned with the welding point on the weld bead. The worker then welds the contact area between the connecting ring and the front plate, completing the first weld. Step 5: After completing the first welding, remove the front plate and the welded connecting ring; rotate the front plate 180° and put it back into the positioning slot of the positioning device. Insert another unwelded connecting ring into the other operating hole of the front plate, so that the positioning ring of the connecting ring is inserted into the positioning hole of the positioning tray, and at the same time, the bottom end of the connecting ring abuts against the bottom of the positioning slot. Step Six: Repeat the welding operation in Step Four to weld the contact area between the new connecting ring and the front plate, completing the welding of the second connecting ring; Step 7: After completing the welding of all connecting rings, check the welding quality of the two connecting rings to ensure that there are no cracks or deformations, and that the welds are uniform and strong.

[0008] By adopting the above technical solution, in the related technology, when welding the front plate of the signal shielding box to the connecting ring, the welding path deviates from the weld bead position due to the fixed position of the welding gun and the easy deformation of the front plate due to heat, affecting the welding quality. At the same time, the front plate is clamped and cannot freely release stress, making it prone to cracking and deformation after welding. However, the welding process of this application adjusts the welding process parameters, places the front plate in the positioning slot of the positioning tray, inserts the positioning ring of the connecting ring into the operating hole and abuts against the surface of the positioning slot, and uses the positioning device to drive the front plate and connecting ring to rotate. During this process, the operator holds the welding gun and flexibly fine-tunes the position of the welding gun according to the possible deformation of the front plate, so that it is always aligned with the weld bead welding point for the first welding. After welding one connecting ring, the front plate is rotated 180° and another connecting ring is inserted and the operation is repeated. Finally, the welding quality is checked. This process effectively solves the problems in the background technology where the fixed position of the welding gun cannot adapt to the deformation of the front plate, resulting in welding path deviation, and the uneven release of stress caused by the clamping of the front plate, leading to easy cracking and deformation after welding, thus significantly improving the welding quality.

[0009] Optionally, in step one, the welding process parameters of the welding equipment are adjusted according to the display interface of the laser welding system as follows: scanning speed range of 600mm / s, scanning width of 1mm, peak power range of 980W, duty cycle of 100%, and pulse frequency of 2000Hz.

[0010] By adopting the above technical solution, the test parameters for conventional welding processes are as follows: scanning speed of 300mm / s, conventional scanning width of 2.5mm-3mm, conventional scanning power of 400w-900w, conventional duty cycle of 100%, and conventional pulse frequency of 2000Hz. Given that conventional welding process parameters are difficult to match the complex and variable actual conditions when welding the front panel and connecting ring of the signal shielding box, and cannot effectively solve the problems of heat deformation and stress release of the front panel affecting welding quality, this application, based on the display interface of the laser welding system, after more than two months of repeated experiments and adjustments, finally determined to precisely limit the scanning speed to 600mm / s, precisely control the scanning width to 1mm, strictly set the peak power to 980W, reasonably adjust the duty cycle to 100%, and accurately set the pulse frequency to 2000Hz within a specific range of welding process parameters. These optimized parameters can more accurately match the heat input and energy distribution during the welding process. While ensuring that the welding strength meets the standards, they can effectively reduce the risk of front plate deformation and welding stress concentration caused by unreasonable parameters, thereby significantly improving the welding quality and ensuring that the welding between the front plate and the connecting ring is firm and stable.

[0011] Optionally, after all connecting rings have been welded, the welded front panel assembly may be subjected to subsequent processing such as grinding and polishing, as needed.

[0012] By adopting the above technical solution, after completing all welding operations between the front panel and the connecting ring of the signal shielding box, considering the potential for uneven surfaces and rough welds at the welded areas, which not only affect the product's appearance quality but may also impact subsequent assembly and use, the welded front panel assembly undergoes subsequent processing such as grinding and polishing according to actual needs. Grinding removes excess solder and burrs from the welded areas, making the surface smoother; polishing further enhances the surface finish, making the front panel assembly more aesthetically pleasing, and also helps reduce stress concentration that may occur due to surface roughness, further improving the overall quality and reliability of the product.

[0013] Secondly, this application discloses a positioning device for any of the above-mentioned welding processes, including a base, a rotating seat, a driving component, a three-jaw chuck, and a positioning mechanism; the rotating seat is rotatably connected to the base; the driving component is disposed on the base and is used to drive the rotating seat to rotate; the three-jaw chuck is fixed on the rotating seat and is used to clamp and fix the positioning mechanism, and the positioning mechanism is used to position the front plate to be welded.

[0014] By adopting the above technical solution, the positioning device uses a rotating seat rotatably connected to the base, and a driving component on the base to drive the rotating seat to rotate. Simultaneously, a three-jaw chuck for clamping and fixing the positioning mechanism is fixed to the rotating seat. The positioning mechanism is used to position the front plate to be welded. During operation, the driving component drives the rotating seat to rotate, which in turn causes the three-jaw chuck and positioning mechanism to rotate, ultimately rotating the front plate. This ensures that the front plate rotates stably and evenly during welding, allowing the operator to flexibly adjust its position with the welding torch. This effectively solves the problem of unstable welding position of the front plate, improving welding accuracy and quality. Furthermore, the device has a reasonable structure, is easy to operate, and helps improve overall welding efficiency.

[0015] Optionally, the positioning mechanism includes a support rod, a bearing block, and a positioning tray. The support rod extends vertically, the bearing block is horizontally positioned, the top end of the support rod is fixedly connected to the bearing block, the bottom end of the support rod is inserted into a three-jaw chuck, the positioning tray is fixedly connected to the bearing block, and a rectangular positioning groove is formed on the upper surface of the positioning tray.

[0016] By adopting the above technical solution, the positioning mechanism is equipped with a support rod extending vertically. The top of the rod is fixedly connected to a horizontally positioned support block, and the bottom is inserted into a three-jaw chuck for fixation. A positioning tray with a rectangular positioning groove is then fixedly connected to the support block. During operation, the three-jaw chuck clamps the support rod, thereby rotating the entire positioning mechanism. The front plate to be welded can be placed in the positioning groove of the positioning tray for precise positioning. Thus, during welding, the positioning mechanism can rotate stably with the rotating seat, ensuring accurate positioning and smooth rotation of the front plate. This provides reliable support for operators to flexibly adjust the position of the welding torch during welding, effectively improving welding accuracy and efficiency. Simultaneously, the rectangular positioning groove facilitates the placement and positioning of the front plate, enhancing the practicality and operability of the device.

[0017] Optionally, the rotating base includes a rotating rod and a rotating disk. The top end of the rotating rod is fixedly connected to the rotating disk, and the bottom end of the rotating rod passes through the base and is rotatably connected to the base. The driving component is a motor. A through cavity is opened in the side wall of the base. The motor is fixed to the top of the cavity, and the output shaft of the motor is fixedly connected to the bottom end of the rotating rod.

[0018] By adopting the above technical solution, the rotating base of the positioning device consists of a rotating rod and a rotating disk. The top end of the rotating rod is fixed to the rotating disk, and the bottom end passes through the base and is rotatably connected to it. The driving component is a motor, which is fixed to the top of a cavity opened in the side wall of the base. The motor output shaft is fixed to the bottom end of the rotating rod. During operation, the motor starts, and its output shaft drives the rotating rod to rotate, which in turn causes the rotating disk to rotate. Since components such as the three-jaw chuck are mounted on the rotating disk, the entire positioning mechanism and the front plate to be welded rotate stably. The structure is compact and the transmission is direct. The motor can accurately control the rotation speed and angle, ensuring the smooth and precise rotation of the front plate during the welding process. This provides excellent conditions for welding operations, helps to improve welding quality and efficiency, and the motor's placement within the cavity in the side wall of the base saves space.

[0019] Optionally, the rotating base includes a rotating rod and a rotating disk. The top end of the rotating rod is fixedly connected to the rotating disk, and the bottom end of the rotating rod passes through the base and is rotatably connected to the base. The driving component is a motor. A through cavity is opened in the side wall of the base. The motor is fixed to the top of the cavity, and the output shaft of the motor is fixedly connected to the bottom end of the rotating rod.

[0020] By adopting the above technical solution, the top end of the rotating rod is fixedly connected to the rotating disk, and the bottom end passes through the base and achieves a rotatable connection. The driving component is a motor, which is fixed to the top of the through cavity in the side wall of the base. The motor output shaft is fixed to the bottom end of the rotating rod. When the motor starts, its output shaft drives the rotating rod to rotate, which in turn causes the rotating disk to rotate. Since components such as the positioning mechanism are installed on the rotating disk, the front plate to be welded rotates stably along with it. By cleverly utilizing the motor to directly drive the rotating rod, the front plate is able to rotate smoothly and accurately during the welding process. This not only helps workers to flexibly operate the welding torch for high-quality welding, but also optimizes the spatial layout of the device by installing the motor in the cavity in the side wall of the base, making the overall structure more compact and reasonable, and improving the practicality and reliability of the device.

[0021] Optionally, the bottom of the positioning tray has a through positioning hole, and the distance from the positioning hole to the center of the positioning tray is half the distance between the two operating holes on the front panel.

[0022] By adopting the above technical solution, a through positioning hole is opened in the bottom of the positioning tray, and the distance from the positioning hole to the center of the positioning tray is precisely set to half the distance between the two operating holes on the front plate. This allows the positioning hole to form a specific positional correspondence with the operating holes on the front plate when the front plate is placed in the positioning slot of the positioning tray. Therefore, when positioning the front plate using the positioning mechanism, the position and orientation of the front plate can be determined more accurately, ensuring that the positions of the two operating holes always meet the welding process requirements during the rotation of the front plate. This ensures that the connecting ring positioning ring can be accurately inserted into the operating hole and abut against the surface of the positioning slot, thereby ensuring that the welding torch can always be aligned with the welding point during welding. This effectively improves the accuracy and stability of the welding between the front plate and the connecting ring, and reduces welding quality problems caused by inaccurate positioning.

[0023] Optionally, one end of the connecting ring is integrally formed with an annular positioning ring. When the positioning ring is inserted into the positioning hole, the outer side wall of the positioning ring just abuts against the inner side wall of the positioning hole, and the bottom end of the connecting ring just abuts against the bottom of the positioning groove.

[0024] By adopting the above technical solution, one end of the connecting ring is integrally formed with an annular positioning ring. When the positioning ring is inserted into the positioning hole at the bottom of the positioning tray groove, the outer wall of the positioning ring abuts against the inner wall of the positioning hole, and the bottom end of the connecting ring abuts against the bottom of the positioning groove. Through the precise cooperation between the positioning ring and the positioning hole, the connecting ring is accurately positioned on the positioning tray. This not only ensures the accurate alignment of the connecting ring with the operating hole of the front plate, but also effectively limits the displacement of the connecting ring in the horizontal and vertical directions by utilizing the abutment relationship between the positioning ring and the positioning hole, and between the connecting ring and the positioning groove. This prevents it from shaking or shifting during welding, thereby ensuring the relative position stability of the connecting ring and the front plate during welding, improving the accuracy and quality of welding, reducing the welding defect rate, and enhancing the reliability and stability of the entire welding process.

[0025] Optionally, when the operator places the front panel into the positioning groove, there is a 1mm gap between the perimeter of the front panel and the edge of the positioning groove.

[0026] By adopting the above technical solution, the 1mm gap provides sufficient operating space for the operator when placing the front plate, facilitating quick and easy placement of the front plate into the positioning slot and improving placement efficiency. At the same time, the gap is not too large, ensuring that the front plate is still constrained to a certain extent within the positioning slot, thus achieving rapid positioning and ensuring the stability of the front plate during subsequent rotational welding. After welding is completed, this gap also allows the operator to apply force from the gap between the front plate and the edge of the positioning slot to quickly remove the front plate from the positioning slot, avoiding the problem of difficulty in removal due to excessive tightness. Overall, this greatly improves the convenience, efficiency, and practicality of the entire welding operation process.

[0027] In summary, this application includes at least one of the following beneficial technical effects: 1. By adjusting specific welding process parameters, the heat input and energy distribution during the welding process can be precisely matched, reducing the risk of front plate deformation and welding stress concentration. At the same time, the positioning device allows the front plate to rotate stably and evenly, and the operator can flexibly adjust the position of the welding torch to ensure that the welding torch is always aligned with the welding point. This effectively solves the problems of welding path deviation caused by the fixed position of the welding torch being unable to adapt to the deformation of the front plate, and uneven stress release of the front plate being clamped, which leads to easy cracking and deformation after welding. This significantly improves the welding quality of the front plate and the connecting ring, ensuring that the welding is firm and stable. 2. The positioning device has a reasonable structure. The motor directly drives the rotating rod to rotate the front plate smoothly and accurately, saving space and providing direct transmission. The positioning tray has a 1mm gap between the positioning slot and the front plate, which facilitates quick placement, positioning and removal of the front plate, improving the convenience and efficiency of the entire welding operation process and helping to improve the overall welding efficiency. Attached Figure Description Figure 1 This is a schematic diagram of the overall structure of the signal shielding box.

[0028] Figure 2 This is a schematic diagram of the welding process between the front panel and the connecting ring of the signal shielding box in Embodiment 1 of this application.

[0029] Figure 3 This is a schematic diagram of the structure in Embodiment 2 of this application, showing the front plate placed inside the positioning device.

[0030] Figure 4 This is a schematic diagram of the front plate, connecting ring, and positioning device in Embodiment 2 of this application.

[0031] Figure 5 This is a structural schematic diagram of the front plate, connecting ring, and positioning device from another perspective in Embodiment 2 of this application.

[0032] Explanation of reference numerals in the attached figures: 1. Signal shielding box; 11. Box body; 111. Front panel; 112. Operating hole; 12. Cover; 121. Observation port; 122. Observation plate; 13. Connecting ring; 131. Positioning ring; 2. Base; 21. Cavity; 3. Rotating seat; 31. Rotating rod; 32. Rotating disk; 4. Driving component; 5. Three-jaw chuck; 6. Positioning mechanism; 61. Support rod; 62. Bearing block; 63. Positioning tray; 64. Positioning groove; 65. Positioning hole. Detailed Implementation

[0033] The following is in conjunction with the appendix Figure 1-5 This application will be described in further detail.

[0034] The terminology used in this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. Unless otherwise defined, the technical or scientific terms used in this application should have the ordinary meaning understood by one of ordinary skill in the art to which this application pertains. The terms "first," "second," and similar terms used in this application do not indicate any order, quantity, or importance, but are merely used to distinguish different components.

[0035] Example 1 This embodiment discloses a welding process for the front panel and connecting ring of a signal shielding box, referring to... Figure 2 , Figure 3 , Figure 4 and Figure 5 The welding process between the front panel of the signal shielding box and the connecting ring includes the following steps: Step 1: Adjust the welding process of the welding equipment According to the laser welding system display interface, adjust the welding process parameters of the welding equipment as follows: Scanning speed: 600.0 mm / s Scan width: 1.00mm Peak power: 980W Duty cycle: 100% Pulse frequency: 2000Hz.

[0036] The test parameters for conventional welding processes are as follows: scanning speed is 300 mm / s, conventional scanning width is 2.5 mm-3 mm, conventional scanning power is 400 W-900 W, conventional duty cycle is 100%, and conventional pulse frequency is 2000 Hz. Given that conventional welding process parameters are difficult to match the complex and variable actual conditions during the welding of the front panel and connecting ring of the signal shielding box, and cannot effectively solve problems such as heat deformation and stress release affecting welding quality, this application, based on the laser welding system display interface, after more than two months of repeated experiments and adjustments, finally determined a specific range of welding process parameters: precisely limiting the scanning speed to 600 mm / s, precisely controlling the scanning width to 1 mm, strictly setting the peak power to 980 W, reasonably adjusting the duty cycle to 100%, and accurately setting the pulse frequency to 2000 Hz. These optimized parameters can more accurately match the heat input and energy distribution during the welding process. While ensuring that the welding strength meets the standards, they can effectively reduce the risk of front plate deformation and welding stress concentration caused by unreasonable parameters, thereby significantly improving the welding quality and ensuring that the welding between the front plate and the connecting ring is firm and stable.

[0037] Step 2: The worker places the front plate 111 to be welded into the positioning slot 64 of the positioning device to ensure that the front plate 111 is accurately positioned.

[0038] Step 3: The worker inserts the positioning ring 131 of one of the connecting rings 13 into the positioning hole 65 of the positioning tray 63. After insertion, the bottom end of the connecting ring 13 abuts against the bottom of the positioning groove 64, achieving stable and precise positioning. The distance from the positioning hole 65 to the center of the positioning tray 63 is exactly half the distance between the two observation ports 121 on the front plate 111, ensuring that precise positioning can be achieved through the positioning ring 131 regardless of which connecting ring 13 is welded. The precise positioning by the positioning device ensures that the relative positions of the front plate 111 and the connecting ring 13 are accurate during the welding process, thereby improving the accuracy and consistency of the welding. At the same time, the positioning groove 64 and the positioning hole 65 also facilitate the quick removal and positioning of the front plate 111 and the connecting ring 13, improving work efficiency.

[0039] Step 4: The worker holds the welding torch and starts the drive unit 4 of the positioning device. The drive unit 4 drives the rotating seat 3 to rotate, the rotating seat 3 drives the three-jaw chuck 5 to rotate, the three-jaw chuck 5 drives the support rod 61 to rotate, the support rod 61 drives the bearing block 62 and the positioning tray 63 to rotate, and the positioning tray 63 drives the front plate 111 and the connecting ring 13 to rotate. During the rotation, the worker holds the welding torch and can flexibly adjust the position of the welding torch according to the possible deformation of the front plate 111 during the welding process. The position of the welding torch is basically relatively stable but can be finely adjusted so that the welding torch can always be aligned with the welding point on the weld bead to weld the contact part between the connecting ring 13 and the front plate 111, completing the first welding.

[0040] Step 5: After completing the initial welding, remove the front plate 111 and the welded connecting ring 13, taking care to avoid damaging the welded parts. Rotate the front plate 111 180° and place it back into the positioning slot 64 of the positioning device, ensuring that the front plate 111 is accurately positioned again. Insert another unwelded connecting ring 13 into the other operating hole 112 of the front plate 111, so that the positioning ring 131 of the connecting ring 13 is inserted into the positioning hole 65 of the positioning tray 63, and at the same time, the bottom end of the connecting ring 13 abuts against the bottom of the positioning slot 64 to achieve precise positioning.

[0041] Step Six: Repeat the welding operation in Step Four. The worker holds the welding gun and adjusts its position flexibly according to the welding situation to weld the contact area between the new connecting ring 13 and the front plate 111, thus completing the welding of the second connecting ring 13.

[0042] Step 7: After welding all connecting rings 13, check the welding quality again to ensure there are no cracks or deformations, and that the welds are uniform and strong. If necessary, perform subsequent processing such as grinding and polishing on the welded front panel 111 assembly to improve its appearance and performance.

[0043] The implementation principle of this embodiment is as follows: First, adjust the welding process parameters of the welding equipment according to the display interface of the laser welding system, including scanning speed, scanning width, peak power, duty cycle, and pulse frequency, to ensure that the welding parameters meet the welding requirements. Then, place the front plate 111 to be welded into the positioning groove 64 of the positioning device to ensure accurate positioning of the front plate 111. Next, insert the positioning ring 131 of one of the connecting rings 13 into the positioning hole 65 of the positioning tray 63, so that the bottom end of the connecting ring 13 just abuts against the bottom of the positioning groove 64, achieving stable and accurate positioning. Start the drive component 4 of the positioning device, which drives the rotating seat 3 to rotate, thereby driving the front plate 111 and the connecting ring 13 to rotate. During the rotation, the operator holds the welding torch and flexibly adjusts the position of the welding torch according to the possible deformation of the front plate 111 during the welding process, so that the welding torch can always be aligned with the welding point on the weld bead, and weld the contact part between the connecting ring 13 and the front plate 111 to complete the first welding. After the initial welding is completed, remove the front panel 111 and the welded connecting ring 13. Rotate the front panel 111 180° and place it back into the positioning slot 64 of the positioning device. Insert another unwelded connecting ring 13 into the other operating hole 112 of the front panel 111 and position it. Repeat the above welding operation to complete the welding of the second connecting ring 13. Finally, check the welding quality to ensure there are no cracks or deformations, and that the weld is uniform and strong. If necessary, perform subsequent processing such as grinding and polishing on the welded front panel 111 assembly. This process, by flexibly adjusting the welding gun position, can adapt to possible deformation of the front panel 111, ensuring welding quality. At the same time, the rotational positioning method improves the accuracy and efficiency of welding, reduces the problem of uneven stress distribution inside the front panel 111 after welding, and makes the welded front panel 111 assembly less deformed and less prone to cracking.

[0044] Example 2 This embodiment discloses a positioning device, referring to... Figure 2 , Figure 3 , Figure 4 and Figure 5 The positioning device includes a base 2, a rotating seat 3, a driving component 4, a three-jaw chuck 5, and a positioning mechanism 6. The rotating seat 3 includes a rotating rod 31 and a rotating disk 32. The top end of the rotating rod 31 is fixedly connected to the rotating disk 32, and the bottom end of the rotating rod 31 passes through the base 2 and is rotatably connected to it. A through cavity 21 is provided on the side wall of the base 2. The driving component 4 is fixed to the top of the cavity 21 and is used to drive the rotating rod 31 to rotate. In this embodiment, the driving component 4 can be a motor or a motor gear structure. The three-jaw chuck 5 is a commonly used mechanical clamp with three synchronously movable jaws. The three-jaw chuck 5 is fixed to the upper surface of the rotating disk 32 by bolts or other fixing methods. When the rotating seat 3 rotates, it drives the three-jaw chuck 5 to rotate synchronously.

[0045] The positioning mechanism 6 includes a support rod 61, a bearing block 62, and a positioning tray 63. In this embodiment, the support rod 61, the bearing block 62, and the positioning tray 63 are all made of metal. The support rod 61 extends vertically, and the bearing block 62 is horizontally positioned. The top end of the support rod 61 is fixedly connected to the lower surface of the bearing block 62, and the bottom end of the support rod 61 is inserted into a three-jaw chuck 5. The three-jaw chuck 5 is used to clamp and fix the support rod 61, thereby fixing the support base. The positioning tray 63 is fixed to the upper surface of the bearing block 62 by multiple bolts, and a rectangular positioning groove 64 is formed on the upper surface of the positioning tray 63. It is worth noting that when the operator places the front plate 111 into the positioning groove 64, there is a 1mm gap between the front plate 111 and the edge of the positioning groove 64. This 1mm gap provides sufficient operating space for the operator, making it easy to quickly and easily place the front plate 111 into the positioning groove 64, thus improving placement efficiency. At the same time, this gap is not too large, ensuring that the front plate 111 is still constrained to a certain extent within the positioning groove 64, which helps to quickly position the front plate 111 and ensures its stable position during subsequent rotational welding. After welding is completed, this gap also allows the operator to apply force through the gap between the front plate 111 and the edge of the positioning groove 64 to quickly remove the front plate 111 from the positioning groove 64, avoiding the problem of difficulty in removal due to excessive tightness. Overall, this greatly improves the convenience, efficiency, and practicality of the entire welding operation process.

[0046] It is particularly noteworthy that the bottom of the positioning tray 63 has a through positioning hole 65, and the front plate 111 has two observation ports 121, the distance between which is fixed. The distance from the positioning hole 65 to the center of the positioning tray 63 is exactly half the distance between the two observation ports 121 on the front plate 111. Correspondingly, one end of the connecting ring 13 has an integrally formed annular positioning ring 131, and the outer wall of the positioning ring 131 is less than or equal to the inner diameter of the positioning hole 65. When the operator inserts the positioning ring 131 into the positioning hole 65, the outer wall of the positioning ring 131 abuts against the inner wall of the positioning hole 65, and the bottom end of the connecting ring 13 abuts against the bottom of the positioning groove 64, achieving precise positioning of the connecting ring 13.

[0047] Since the distance from the positioning hole 65 to the center of the positioning tray 63 is exactly half the distance between the two observation ports 121 on the front plate 111, the positioning hole 65 can be matched with the corresponding observation port 121 regardless of which connecting ring 13 is being welded. Therefore, regardless of which connecting ring 13 is being welded, precise positioning of the connecting ring 13 can be achieved by inserting the positioning ring 131 into the positioning hole 65. After the front plate 111 is placed in the positioning groove 64, the axis of the support rod 61 coincides with the axis of the observation port 121, and multiple bolts are located inside the observation port 121. Simultaneously, once the worker inserts the positioning ring 131 on the connecting ring 13 into the positioning hole 65, the welding operation can begin.

[0048] The implementation principle of the above embodiment is as follows: The positioning device includes a base 2, a rotating seat 3, a driving component 4, a three-jaw chuck 5, and a positioning mechanism 6. The rotating seat 3 consists of a rotating rod 31 and a rotating disk 32. The top end of the rotating rod 31 is fixedly connected to the rotating disk 32, and the bottom end passes through the base 2 and is rotatably connected to the base 2. The driving component 4 is fixed to the top of the through cavity 21 opened in the side wall of the base 2, and is used to drive the rotating rod 31 to rotate, thereby driving the rotating seat 3 to rotate. The three-jaw chuck 5 is fixed to the upper surface of the rotating disk 32 and rotates synchronously with the rotating seat 3. The positioning mechanism 6 includes a support rod 61, a bearing block 62, and a positioning tray 63. The support rod 61 extends vertically, and its top end is fixedly connected to the lower surface of the bearing block 62. Its bottom end is inserted into the three-jaw chuck 5 and is clamped and fixed by the three-jaw chuck 5. The positioning tray 63 is fixed to the upper surface of the support block 62 by multiple bolts. A rectangular positioning groove 64 is formed on the upper surface. When the operator places the front plate 111 into the positioning groove 64, there is a 1mm gap between the perimeter of the front plate 111 and the edge of the positioning groove 64, facilitating quick removal of the front plate 111. A through positioning hole 65 is formed at the bottom of the groove of the positioning tray 63. The distance from the positioning hole 65 to the center of the positioning tray 63 is exactly half the distance between the two observation ports 121 on the front plate 111. One end of the connecting ring 13 has an integrally formed annular positioning ring 131. When the positioning ring 131 is inserted into the positioning hole 65, the outer wall of the positioning ring 131 abuts against the inner wall of the positioning hole 65, and the bottom end of the connecting ring 13 abuts against the bottom of the positioning groove 64, achieving precise positioning of the connecting ring 13. During the welding process, the drive component 4 drives the rotating seat 3 to rotate, which in turn drives the three-jaw chuck 5, support rod 61, bearing block 62 and positioning tray 63 to rotate, thereby driving the front plate 111 and connecting ring 13 to rotate, and the worker holds the welding gun to perform the welding operation.

[0049] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A welding process for the front panel and connecting ring of a signal shielding box, characterized in that: Includes the following steps: Step 1: Adjust the welding process parameters of the welding equipment: Step 2: Place the front panel (111) into the positioning slot (64) of the positioning tray (63); Step 3: Insert the positioning ring (131) of one of the connecting rings (13) into one of the operating holes (112) of the front plate (111), so that the outer side wall of the positioning ring (131) abuts against the inner side wall of the operating hole (112), and the bottom end of the positioning ring (131) abuts against the upper surface of the positioning groove (64). Step 4: The worker holds the welding torch and starts the drive unit (4) of the positioning device. The drive unit (4) drives the rotating seat (3) to rotate, the rotating seat (3) drives the three-jaw chuck (5) to rotate, the three-jaw chuck (5) drives the support rod (61) to rotate, the support rod (61) drives the bearing block (62) and the positioning tray (63) to rotate, and the positioning tray (63) drives the front plate (111) and the connecting ring (13) to rotate. During the rotation, the worker holds the welding torch and can flexibly adjust the position of the welding torch according to the possible deformation of the front plate (111) during the welding process. The position of the welding torch is basically relatively stable but can be finely adjusted so that the welding torch can always be aligned with the welding point on the weld bead to weld the contact part between the connecting ring (13) and the front plate (111) to complete the first welding. Step 5: After completing the first welding, remove the front plate (111) and the welded connecting ring (13); rotate the front plate (111) 180° and put it back into the positioning groove (64) of the positioning device; insert another unwelded connecting ring (13) into the position of the other operating hole (112) of the front plate (111), so that the positioning ring (131) of the connecting ring (13) is inserted into the positioning hole (65) of the positioning tray (63), and at the same time, the bottom end of the connecting ring (13) abuts against the bottom of the positioning groove (64); Step 6: Repeat the welding operation in Step 4 to weld the contact area between the new connecting ring (13) and the front plate (111) to complete the welding of the second connecting ring (13); Step 7: After completing the welding of all connecting rings (13), check the welding quality of the two connecting rings (13) to ensure that there are no cracks or deformations, and that the welds are uniform and firm.

2. The welding process between the front plate and the connecting ring of a signal shielding box according to claim 1, characterized in that: In step one, according to the laser welding system display interface, adjust the welding process parameters of the welding equipment as follows: scanning speed range of 600mm / s, scanning width of 1mm, peak power range of 980W, duty cycle of 100%, and pulse frequency of 2000Hz.

3. The welding process between the front plate and the connecting ring of a signal shielding box according to claim 1, characterized in that: After welding all connecting rings (13), the welded front panel (111) assembly is subjected to subsequent processing such as grinding and polishing as needed.

4. A positioning device for the welding process according to any one of claims 1-3, characterized in that: It includes a base (2), a rotating seat (3), a driving component (4), a three-jaw chuck (5), and a positioning mechanism (6); the rotating seat (3) is rotatably connected to the base (2); the driving component (4) is disposed on the base (2) and is used to drive the rotating seat (3) to rotate; the three-jaw chuck (5) is fixed on the rotating seat (3) and is used to clamp and fix the positioning mechanism (6), which is used to position the front plate (111) to be welded.

5. The positioning device according to claim 4, characterized in that: The positioning mechanism (6) includes a support rod (61), a bearing block (62), and a positioning tray (63). The support rod (61) extends vertically, the bearing block (62) is horizontally positioned, the top end of the support rod (61) is fixedly connected to the bearing block (62), the bottom end of the support rod (61) is inserted into a three-jaw chuck (5), the positioning tray (63) is fixedly connected to the bearing block (62), and a rectangular positioning groove (64) is provided on the upper surface of the positioning tray (63).

6. The positioning device according to claim 4, characterized in that: The rotating base (3) includes a rotating rod (31) and a rotating disk (32). The top end of the rotating rod (31) is fixedly connected to the rotating disk (32), and the bottom end of the rotating rod (31) passes through the base (2) and is rotatably connected to the base (2). The driving component (4) is a motor. The side wall of the base (2) has a through cavity (21). The motor is fixed to the top of the cavity (21), and the output shaft of the motor is fixedly connected to the bottom end of the rotating rod (31).

7. The positioning device according to claim 4, characterized in that: The rotating base (3) includes a rotating rod (31) and a rotating disk (32). The top end of the rotating rod (31) is fixedly connected to the rotating disk (32), and the bottom end of the rotating rod (31) passes through the base (2) and is rotatably connected to the base (2). The driving component (4) is a motor. The side wall of the base (2) has a through cavity (21). The motor is fixed to the top of the cavity (21), and the output shaft of the motor is fixedly connected to the bottom end of the rotating rod (31).

8. The positioning device according to claim 5, characterized in that: The bottom of the positioning tray (63) has a through positioning hole (65), and the distance from the positioning hole (65) to the center of the positioning tray (63) is half the distance between the two operation holes (112) on the front plate (111).

9. The positioning device according to claim 4, characterized in that: One end of the connecting ring (13) is integrally formed with an annular positioning ring (131). When the positioning ring (131) is inserted into the positioning hole (65), the outer side wall of the positioning ring (131) just abuts against the inner side wall of the positioning hole (65), and the bottom end of the connecting ring (13) just abuts against the bottom of the positioning groove (64).

10. The positioning device according to claim 4, characterized in that: When the worker places the front panel (111) into the positioning groove (64), there is a 1mm gap between the front panel (111) and the edge of the positioning groove (64).

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