A welding clamping fixture for a metering box

Abstract

This invention discloses a welding clamping fixture for a metering box, relating to the field of welding clamping fixture technology. It includes a processing table, and the clamping fixture further includes: a first motor, fixedly mounted on the bottom of the processing table, with its output shaft passing through the processing table and fixedly mounted on a rotating seat; a placement seat fixedly mounted on the top of the rotating seat, with the metering box housing placed on top of the placement seat; and an alignment component, positioned on top of the rotating seat and cooperating with the metering box housing to center the metering box housing on the placement seat. This invention, through internal and external clamping, avoids the deformation of the side plates of the energy metering box caused by traditional external clamps, ensuring clamping effectiveness. During welding, it can drive the housing to rotate and accurately reposition, meeting the positioning requirements for welding seams on all four sides. It has a high degree of automation, reducing the single-piece processing cycle to within 3 minutes, increasing efficiency by 40%, and is particularly suitable for thin-plate metering boxes with a thickness of 0.8-1.5mm.

Description

Technical Field

[0001] This invention relates to the field of welding clamping fixture technology, and in particular to a welding clamping fixture for a metering box. Background Technology

[0002] A metering box is a collection of metering instruments and auxiliary equipment necessary for measuring electrical energy, including electricity meters, voltage and current transformers and their secondary circuits, electricity metering panels, cabinets, and boxes. Metering boxes can be installed in a suspended or floor-mounted manner. To ensure installation quality, suspended boxes must be secured with built-in expansion bolts, and the bolt dimensions must meet safety and security requirements, as well as outdoor installation conditions.

[0003] In the existing technology, most existing clamping fixtures only use movable clamping plates for fixation. However, since the electricity metering box is made of bent sheet metal, the sheet metal is prone to deformation when the side of the electricity metering box is squeezed, resulting in poor clamping effect of the electricity metering box and affecting subsequent welding processing. Therefore, we propose a welding clamping fixture for metering boxes to solve the above problems. Summary of the Invention

[0004] The purpose of this application is to provide a welding clamping fixture for a metering box, in order to solve the problem that most of the existing clamping fixtures mentioned in the background art only use movable clamping plates for fixation. However, since the electricity metering box is made of bent sheet metal, the sheet metal is prone to deformation when the side of the electricity metering box is squeezed, resulting in poor clamping effect of the electricity metering box and affecting subsequent welding processing.

[0005] To achieve the above objectives, this application provides the following technical solution: a welding clamping fixture for a metering box, including a processing table, the clamping fixture further including: The first motor is fixedly installed at the bottom of the processing table. The output shaft of the first motor passes through the processing table and is fixedly installed on a rotating seat. A placement seat is fixedly installed on the top of the rotating seat, and a metering box housing is placed on the top of the placement seat. Alignment component, which is disposed on the top of the rotating seat and cooperates with the metering box housing, is used to position the metering box housing at the center of the placement seat; The clamping mechanism includes: a turntable, a second electric push rod, a swing rod, a rectangular rod, a pressure plate, two third electric push rods, a sliding sleeve, four fourth electric push rods, and four supports. The turntable is located on the top of the processing table. The second electric push rod is fixedly installed on the top of the turntable. One end of the swing rod is fixedly installed on the output shaft of the second electric push rod. The top end of the rectangular rod is rotatably connected to the bottom of the swing rod. The pressure plate is fixedly installed on the bottom end of the rectangular rod. Both third electric push rods are fixedly installed on the rectangular rod. The output shafts of both third electric push rods are fixedly installed on the top of the sliding sleeve. The sliding sleeve is slidably fitted on the rectangular rod. The four fourth electric push rods are respectively fixedly installed on the outside of the sliding sleeve. The output shafts of the fourth electric push rods are fixedly installed on the corresponding supports. Two fifth electric push rods are fixedly installed on the outside of the supports. A clamping plate is fixedly installed on the output shaft of the fifth electric push rod. A rubber pad is fixedly installed on one side of the clamping plate. A drive assembly is disposed on the top of the processing table and cooperates with the turntable. The drive assembly is used to drive the turntable to rotate. A limiting mechanism is provided on the top of the processing table. The limiting component cooperates with the turntable and is used to limit the rotation of the turntable. With the above structure, by setting a first motor to drive the rotating seat and the placement seat to rotate, the metering box shell can be adjusted to a suitable welding angle, allowing the welding machine to weld the four edges in sequence. The alignment component ensures that the shell is located in the center of the placement seat, providing a reference for subsequent clamping. In the clamping mechanism, the second electric push rod pushes the swing rod to make the pressure plate press against the bottom of the inner wall of the shell to prevent the shell from floating. Two third electric push rods drive the sliding sleeve to rise and fall, adjusting the height of the four fourth electric push rods. The fourth electric push rods push the bracket close to the top of the side of the metering box shell. Two fifth electric push rods located on the same bracket drive two clamping plates and two rubber pads to clamp the corresponding side from the inside and outside of the metering box shell. This single-sided clamping method avoids the problem of bending and deformation of the plate caused by the traditional external clamping plate. It is especially suitable for metering boxes with thin plate bending. At the same time, the drive component drives the turntable to rotate, so that the clamping mechanism does not hinder the loading and unloading of the metering box shell onto the placement seat, improving processing convenience.

[0006] Preferably, the alignment assembly includes four first electric push rods and four centering plates. The four first electric push rods are all fixedly installed on the top of the rotating seat. The output shafts of the first electric push rods are fixedly installed on one side of the corresponding centering plate. One side of each of the four centering plates contacts the front, rear, left, and right sides of the metering box housing, respectively. By activating the four first electric push rods simultaneously, the centering plates are pushed towards the center, pushing the metering box housing from the four directions (front, rear, left, and right) so that the housing is automatically centered on the top of the placement seat. This process ensures that the subsequent clamping mechanism clamps and fixes the four sides of the metering box housing, avoiding excessive clamping force on one side and insufficient clamping force on the other side due to housing misalignment. At the same time, the alignment action will not cause excessive compression on the side wall of the housing, reducing the risk of plate deformation. After alignment, the centering plate can be retracted to make room for welding, achieving a combination of rapid positioning and interference-free operation.

[0007] Preferably, the drive assembly includes a support shaft, a second motor, a first gear, and a second gear. The bottom end of the support shaft is rotatably connected to the top of the processing table. The second motor is fixedly mounted on the top of the processing table. The first gear is fixedly mounted on the output shaft of the second motor and is fixedly sleeved on the support shaft. The second gear meshes with the first gear. By starting the second motor, the first gear is driven to rotate. The first gear meshes with the second gear, causing the support shaft and the turntable to rotate together, thereby moving the entire clamping mechanism above the metering box housing. This gear transmission method ensures smooth operation and accurate angle control, avoids the clamping mechanism from obstructing the loading and unloading of the metering box housing onto the placement seat, and improves ease of use.

[0008] Preferably, the limiting mechanism includes a locking rod, a rotating shaft, a limiting rod, a torsion spring, and a positioning rod. The bottom end of the locking rod is slidably connected to the top of the processing table. A slot is provided on the turntable, allowing the locking rod to detach and reside within the slot. The rear end of the rotating shaft is rotatably connected to the locking rod. The limiting rod is fixedly installed at the front end of the rotating shaft. The torsion spring is sleeved on the rotating shaft, with its rear end fixedly installed on the locking rod and its front end fixedly installed on one side of the limiting rod. A limiting groove is provided at the bottom of the limiting rod. The bottom end of the positioning rod is fixedly installed on the top of the processing table, and the top end of the positioning rod mates with the limiting groove. When the turntable is rotated to the desired angle by the drive component, the locking lever is pushed into the slot on the turntable to limit its rotation. At the same time, the limiting rod is rotated to lock the positioning rod in the limiting slot. The torsion spring provides holding force to prevent the limiting rod from accidentally disengaging. This double limiting structure ensures that the angle of the clamping mechanism remains unchanged during the welding process, avoiding the turntable from shifting due to external impact or vibration. This ensures the stability of the clamping mechanism in clamping and fixing the metering box shell. In addition, when unlocking, simply move the limiting rod to remove the positioning rod and then pull out the locking lever. The operation is simple and reliable.

[0009] Preferably, the top of the processing table has a sliding groove, and the bottom end of the clamping rod is slidably connected in the sliding groove. A spring is fixedly installed on one side of the inner wall of the sliding groove, and one end of the spring is fixedly installed on the clamping rod. By opening the sliding groove on the top of the processing table, the bottom end of the clamping rod is slidably connected in the sliding groove, and the spring is fixed on one side of the inner wall of the sliding groove. One end of the spring is fixed on the clamping rod. When it is necessary to limit the movement, the clamping rod is released, and the spring force automatically pushes the clamping rod towards the groove, keeping the clamping rod in the inserted state without the need for continuous manual force. When it is necessary to release the limit, the clamping rod is pulled out of the groove by overcoming the spring force. This self-locking design reduces the operation steps, improves the convenience of use, and enhances the reliability of the limit.

[0010] Preferably, two first telescopic rods are fixedly installed on the top of the turntable, and the output shafts of the two first telescopic rods are fixedly installed on the swing rod. By fixing the two first telescopic rods on the top of the turntable and fixing the output shafts of the two first telescopic rods to the swing rod, when the second electric push rod pushes the swing rod to swing up and down, the first telescopic rods extend and retract with the movement of the swing rod, providing auxiliary support and guidance for the swing rod, preventing the swing rod from shifting laterally or shaking during the movement, ensuring that the pressure plate can accurately and vertically press against the bottom inner wall of the metering box housing, and also reducing the cantilever force on the output shaft of the second electric push rod, extending the service life of the electric push rod, and making the clamping action more stable and reliable.

[0011] Preferably, a rotating seat is fixedly installed at the bottom of the swing rod, and the bottom of the rotating seat is fixedly installed at the top of the rectangular rod. By fixing the rotating seat at the bottom of the swing rod and connecting the bottom of the rotating seat to the top of the rectangular rod, the rotating seat can provide stable rotational support for the rectangular rod and the pressure plate. When the first motor drives the rotating seat, the placement seat and the metering box housing to rotate and change positions, no motion interference will occur. This ensures stable clamping of the metering box housing without affecting the rotation of the metering box housing, making it highly practical.

[0012] Preferably, an anti-slip pad is fixedly installed on the bottom of the pressure plate. The bottom of the anti-slip pad contacts the inner bottom wall of the metering box housing. The anti-slip pad is made of flexible material, which increases the friction with the bottom surface of the housing, prevents the housing from sliding horizontally, and also acts as a buffer to prevent the pressure plate from directly and rigidly damaging the surface of the housing. Since the bottom of the metering box housing often has bent edges or uneven structures, the anti-slip pad can fill in the minor unevenness, so that the clamping force is evenly distributed and avoids local stress concentration that could cause deformation of the bottom plate. This further improves the stability of clamping and the protection of the housing.

[0013] Preferably, four second telescopic rods are fixedly installed on the outer side of the sliding sleeve. One end of each second telescopic rod is fixedly installed on one side of the corresponding bracket. By fixing the four second telescopic rods on the outer side of the sliding sleeve, and one end of each second telescopic rod being fixed to one side of the corresponding bracket, when the fourth electric push rod pushes the bracket to move outward, the second telescopic rod extends along with the bracket, providing horizontal guidance and support for the bracket, preventing the bracket from deflecting or sagging during the extension process, and ensuring that the four brackets always remain in the same horizontal plane. In this way, the fifth electric push rod and the clamping plate are subjected to uniform force when acting on the inner wall of the housing. At the same time, the second telescopic rod also bears part of the bending moment, reducing the lateral load on the output shaft of the fourth electric push rod, and improving the rigidity and durability of the entire tensioning mechanism.

[0014] Preferably, a welding machine mounting plate is fixedly installed on the right end of the processing table, and a controller is fixedly installed on the top of the processing table. The welding machine mounting plate is fixed on the right end of the processing table to fix the welding equipment, which facilitates the welding equipment to weld the metering box shell. The controller is fixed on the top of the processing table to centrally control the first motor, first electric push rod, second electric push rod, third electric push rod, fourth electric push rod, fifth electric push rod, and other actuators, thereby realizing the automation and sequential control of the clamping action. The operator only needs to set the parameters on the controller to complete a series of actions such as centering, clamping, internal support, and rotation limit, which reduces the difficulty and labor intensity of manual operation, while improving the repeatability and positioning accuracy of clamping and welding efficiency.

[0015] The beneficial effects of this invention are: 1. By setting the first motor to drive the rotating seat and the placement seat to rotate, the metering box shell can be adjusted to a suitable welding angle, which allows the welding machine to weld the four edges in sequence. The alignment component ensures that the shell is located in the center of the placement seat, providing a reference for subsequent clamping. In the clamping mechanism, the second electric push rod pushes the swing rod to make the pressure plate press against the bottom of the inner wall of the shell to prevent the shell from floating. The two third electric push rods drive the sliding sleeve to rise and fall, adjusting the height of the four fourth electric push rods. The fourth electric push rods push the bracket close to the top of the side of the metering box shell. The two fifth electric push rods located on the same bracket drive the two clamping plates and two rubber pads to clamp the corresponding side from the inside and outside of the metering box shell. This single-sided clamping method avoids the problem of bending and deformation of the plate caused by the traditional external clamping plate. It is especially suitable for metering boxes with thin plate bending. At the same time, the drive component drives the turntable to rotate, so that the clamping mechanism will not hinder the loading and unloading of the metering box shell onto the placement seat, improving the convenience of processing. 2. By activating the four first electric push rods simultaneously, the centering plate is pushed towards the center, and the metering box housing is pushed from the front, back, left and right directions, so that the housing is automatically centered on the top of the placement seat. This process ensures that the subsequent clamping mechanism clamps and fixes the four sides of the metering box housing, avoiding excessive clamping force on one side and insufficient clamping force on the other side due to housing misalignment. At the same time, the alignment action will not cause excessive compression on the side wall of the housing, reducing the risk of plate deformation. After alignment, the centering plate can be retracted to make room for welding, realizing the combination of rapid positioning and interference-free operation. 3. By starting the second motor, the first gear is driven to rotate. The first gear meshes with the second gear, causing the support shaft and the turntable to rotate together, thereby moving the entire clamping mechanism out of the metering box housing. This gear transmission method operates smoothly and the angle is accurately controlled. It avoids the clamping mechanism from hindering the loading and unloading of the metering box housing onto the placement seat, thus improving the ease of use. 4. After the drive component drives the turntable to rotate to the required angle, push the locking rod to insert into the slot on the turntable, restricting the turntable from continuing to rotate. At the same time, rotate the limit rod to make the limit slot lock the positioning rod. The torsion spring provides holding force to prevent the limit rod from accidentally disengaging. This double limit structure ensures that the angle of the clamping mechanism remains unchanged during the welding process, avoiding the turntable from shifting due to external impact or vibration, thereby ensuring the stability of the clamping mechanism in clamping and fixing the metering box shell. In addition, when unlocking, simply move the limit rod to remove the positioning rod and then pull out the locking rod. The operation is simple and reliable. This invention uses internal and external clamping methods to avoid the deformation of the side plates of the electricity metering box caused by traditional external clamps, thus ensuring the clamping effect. During welding, it can drive the shell to rotate and accurately reposition, meeting the positioning requirements of welding on all four sides. It has a high degree of automation, reducing the processing cycle of a single piece to within 3 minutes and increasing efficiency by 40%. It is especially suitable for thin plate metering boxes with a thickness of 0.8-1.5mm. Attached Figure Description

[0016] Figure 1 This is a three-dimensional front view of the structure according to an embodiment of this application; Figure 2 Appendix to the embodiments of this application Figure 1 A schematic diagram of the structure of part A; Figure 3 This is a three-dimensional rear view of the structure according to an embodiment of this application; Figure 4 This is a three-dimensional bottom view of the structure according to an embodiment of this application; Figure 5 This is a three-dimensional structural view of the placement base, metering box housing, first electric push rod, and centering plate according to an embodiment of this application. Figure 6 A three-dimensional structural diagram of the locking rod, spring, rotating shaft, limiting rod, limiting groove, and torsion spring in an embodiment of this application; Figure 7This is a three-dimensional structural diagram of the support shaft, second motor, first gear, second gear, turntable, second electric push rod, swing rod, first telescopic rod, rotating seat, rectangular rod, pressure plate, anti-slip pad, and slot according to an embodiment of this application. Figure 8 This is a three-dimensional structural diagram of the swing rod, rotating seat, rectangular rod, pressure plate, anti-slip pad, third electric push rod, fourth electric push rod, and bracket according to an embodiment of this application. Figure 9 A three-dimensional structural view of the sliding sleeve, the fourth electric push rod, the bracket, the second telescopic rod, and the fifth electric push rod according to an embodiment of this application; Figure 10 This is a three-dimensional structural diagram of the fourth electric push rod, bracket, second telescopic rod, fifth electric push rod, clamping plate, and rubber pad according to an embodiment of this application.

[0017] In the diagram: 1. Processing table; 2. First motor; 3. Rotary seat; 4. Placement seat; 5. Metering box housing; 6. First electric push rod; 7. Centering plate; 8. Support shaft; 9. Second motor; 10. First gear; 11. Second gear; 12. Turntable; 13. Second electric push rod; 14. Swing rod; 15. First telescopic rod; 16. Rotating seat; 17. Rectangular rod; 18. Pressure plate; 19. Anti-slip pad; 20. Third electric push rod; 21. Sliding sleeve; 22. Fourth electric push rod; 23. Bracket; 24. Second telescopic rod; 25. Fifth electric push rod; 26. Clamping plate; 27. Rubber pad; 28. Slot; 29. ​​Slide groove; 30. Clamping rod; 31. Spring; 32. Rotating shaft; 33. Limiting rod; 34. Limiting groove; 35. Torsion spring; 36. Positioning rod; 37. Welding machine mounting plate; 38. Controller. Detailed Implementation

[0018] The present invention will be further explained below with reference to specific embodiments.

[0019] refer to Figures 1-10 This embodiment proposes a welding clamping fixture for a metering box. The fixture uses a processing table 1 as its base. A first motor 2 is fixedly installed at the bottom of the processing table 1 by bolts. The output shaft of the first motor 2 passes vertically through the surface of the processing table 1, and its top end is connected to a rotating seat 3 by a flat key. A placement seat 4 is welded to the top of the rotating seat 3. The upper surface of the placement seat 4 is provided with a positioning groove that matches the bottom contour of the metering box shell 5.

[0020] The alignment assembly consists of four first electric push rods 6 and four centering plates 7. The four first electric push rods 6 are symmetrically distributed in a cross shape on the top of the rotating seat 3. The piston rod end of each push rod is fixed to the centering plate 7 by bolts. A polyurethane buffer pad is attached to the inner side of the centering plate 7. When the four first electric push rods 6 extend synchronously, the four centering plates 7 push the metering box housing 5 from the front, back, left, and right directions, so that its center coincides with the center of the placement seat 4.

[0021] The core component of the clamping mechanism, the turntable 12, is connected to the processing table 1 via a support shaft 8. A deep groove ball bearing is installed at the lower end of the support shaft 8 to enable rotation. A second electric push rod 13 is bolted to the center of the top of the turntable 12, and a swing rod 14 is welded to the end of its piston rod. Two first telescopic rods 15 are added between the swing rod 14 and the turntable 12. The two ends of the first telescopic rod 15 are connected to the swing rod 14 and the turntable 12 respectively via ball joints. The bottom of the swing rod 14 is connected to a rectangular rod 17 via a rotating seat 16. A thrust ball bearing is installed inside the rotating seat 16 to ensure rotational flexibility.

[0022] A pressure plate 18 is welded to the lower end of the rectangular rod 17, and a 3mm thick silicone anti-slip pad 19 is attached to the bottom of the pressure plate 18. A sliding sleeve 21 is fitted in the middle of the rectangular rod 17, and two third electric push rods 20 are symmetrically arranged on both sides of the rectangular rod 17, with their piston rod ends connected to the top of the sliding sleeve 21 by bolts. Four second telescopic rods 24 are fixed to the outside of the sliding sleeve 21 by bolts, and each second telescopic rod 24 is connected to a bracket 23 at its end. The bracket 23 has an L-shaped structure, with its horizontal section connected to the second telescopic rods 24 by bolts, and two fifth electric push rods 25 installed on its vertical section. A clamping plate 26 is welded to the piston rod end of the fifth electric push rod 25, and a 5mm thick rubber pad 27 is attached to the inner side of the clamping plate 26.

[0023] The drive assembly consists of a second motor 9, a first gear 10, and a second gear 11. The second motor 9 is fixed to the right side of the processing table 1 via a motor mount, and the first gear 10 is mounted on its output shaft. The second gear 11 is mounted in the middle of the support shaft 8. The gear module is selected as 2, and the gear ratio is 3:1 to achieve speed reduction transmission. When the second motor 9 starts, it drives the turntable 12 to rotate 90 degrees through gear meshing, causing the clamping mechanism to move out of the metering box housing 5 directly above it.

[0024] The limiting mechanism is located on the left side of the machining table 1. The bottom of the locking rod 30 is embedded in the slide groove 29 opened in the machining table 1. A compression spring 31 is installed in the slide groove 29, and the initial compression of the spring 31 is set to 10mm. The top of the locking rod 30 is designed with a wedge-shaped structure to cooperate with the locking groove 28 opened on the edge of the turntable 12. The middle of the locking rod 30 is connected to the limiting rod 33 through the rotating shaft 32. A torsion spring 35 is mounted on the rotating shaft 32, and the torque of the torsion spring 35 is set to 2N·m. The bottom of the limiting rod 33 has a limiting groove 34, which forms a snap-fit ​​structure with the positioning rod 36 fixed on the machining table 1. When the turntable 12 rotates to the position, the locking rod 30 automatically inserts into the locking groove 28 under the action of the spring 31. At the same time, the limiting rod 33 rotates under the action of the torsion spring 35, so that the limiting groove 34 locks the positioning rod 36.

[0025] A welding machine mounting plate 37 is installed on the right side of the processing table 1, with a T-slot for fixing the welding torch. A controller 38 is installed on the top of the processing table 1. The controller 38 uses a PLC control unit and is connected to all electric push rods and motors via cables. During operation, the sequence of actions is set via the controller 38: first, the four first electric push rods 6 are activated to complete centering and positioning; then, the second electric push rods 13 extend to press the pressure plate 18 against the bottom of the housing; next, the four fourth electric push rods 22 extend synchronously to bring the bracket 23 close to the side wall of the housing; finally, the two fifth electric push rods 25 extend relative to each other to complete the inner and outer clamping. During welding, the first motor 2 can drive the housing to rotate; after each weld seam is completed, the second motor 9 drives the turntable 12 to rotate 90 degrees for repositioning.

[0026] This fixture avoids sheet metal deformation caused by traditional external clamps through internal and external clamping, making it particularly suitable for measuring boxes of thin plates with a thickness of 0.8-1.5mm. The elastic design of the anti-slip pad 19 and rubber pad 27 can compensate for surface unevenness within 0.5mm, ensuring uniform distribution of clamping force. The gear transmission system achieves an accuracy of ±0.1 degrees, meeting the positioning requirements for four-sided seam welding. The double limiting structure composed of spring 31 and torsion spring 35 can withstand impact torque within 50N·m without displacement. The entire clamping process is highly automated, and the single-piece processing cycle can be shortened to less than 3 minutes, improving efficiency by 40% compared to traditional processes.

[0027] Working principle: In use, firstly connect the first motor 2, the first electric push rod 6, the second motor 9, the second electric push rod 13, the third electric push rod 20, the fourth electric push rod 22, the fifth electric push rod 25, and the controller 38 to the external power supply. Then, start the controller 38 and set the action sequence. First, the four first electric push rods 6 extend synchronously, driving the four centering plates 7 to push the metering box housing 5 from the front, back, left, and right directions. The polyurethane buffer pads on the inner side of the centering plates 7 contact the metering box housing 5, making its center coincide with the positioning groove in the center of the placement seat 4, thus completing the centering and positioning. Then, the second electric push rod 13 extends, and the swing rod 14 at the end of its piston rod moves between the two first extension and retraction rods. With the assistance of rod 15, the pressure plate 18 at the lower end of the rectangular rod 17 moves downward, and the 3mm thick silicone anti-slip pad 19 at the bottom of the pressure plate 18 contacts and presses against the bottom of the metering box housing 5; then, the four fourth electric push rods 22 extend synchronously, pushing the sliding sleeve 21 to move on the rectangular rod 17, and the bracket 23 connected to the outside of the sliding sleeve 21 through the second telescopic rod 24 approaches the side wall of the metering box housing 5; finally, the two fifth electric push rods 25 extend relative to each other, and the 5mm thick rubber pad 27 on the inner side of the clamping plate 26 at the piston rod end contacts the side wall of the metering box housing 5, completing the inner and outer clamping. The elastic design of the anti-slip pad 19 and the rubber pad 27 can compensate for surface unevenness within 0.5mm, ensuring that the clamping force is evenly distributed. During the welding process, the first motor 2 starts, and its output shaft drives the rotating seat 3, the placement seat 4, and the metering box housing 5 to rotate. After each weld is completed, the second motor 9 starts, and through the meshing transmission of the first gear 10 and the second gear 11 (the gear module is selected as 2, and the gear ratio is 3:1 to achieve speed reduction transmission), it drives the turntable 12 to rotate 90 degrees, so that the clamping mechanism moves out of the metering box housing 5. At this time, the slot 28 on the edge of the turntable 12 cooperates with the wedge structure at the top of the clamping rod 30 that pops out under the action of the compression spring 31 (the initial compression amount is set to 10mm) in the sliding groove 29 on the left side of the processing table 1. At the same time, the limiting rod 33 in the middle of the clamping rod 30 rotates under the action of the torsion spring 35 (the torque is set to 2N·m) mounted on the rotating shaft 32, so that the limiting groove 34 at the bottom of the limiting rod 33 locks the positioning rod 36 fixed on the processing table 1, forming a double limiting structure that can withstand an impact torque of up to 50N·m without displacement. After the repositioning is completed, welding continues. The T-slot on the welding machine mounting plate 37 on the right side of the processing table 1 is used to fix the welding gun for welding operations. The entire clamping process is highly automated, and the processing cycle for a single piece can be shortened to less than 3 minutes, which is 40% more efficient than traditional processes. This fixture avoids the deformation of the sheet metal caused by traditional external clamps through internal and external clamping, and is particularly suitable for the metering box of thin plates with a thickness of 0.8-1.5mm. The accuracy of the gear transmission system reaches ±0.1 degrees, which meets the positioning requirements for welding four-sided seams.

[0028] It should be noted that the specific models of the first motor 2, first electric actuator 6, second motor 9, second electric actuator 13, third electric actuator 20, fourth electric actuator 22, fifth electric actuator 25, and controller 38 used can be selected by those skilled in the art. Furthermore, the aforementioned first motor 2, first electric actuator 6, second motor 9, second electric actuator 13, third electric actuator 20, fourth electric actuator 22, fifth electric actuator 25, and controller 38 are all existing technologies and will not be elaborated upon in this solution. Additionally, in this application, the two front and rear first electric actuators 6 are controlled by the same synchronizer, and the two left and right first electric actuators 6 are also controlled by the same synchronizer. All other identical drive devices in this application are controlled by the same synchronizer.

[0029] Finally, it should be noted that in this document, relational terms such as first and second (number one, number two), etc., are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0030] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A welding clamping fixture for a metering box, comprising a processing table (1), characterized in that, The clamping fixture also includes: The first motor (2) is fixedly installed at the bottom of the processing table (1). The output shaft of the first motor (2) passes through the processing table (1) and is fixedly installed with a rotating seat (3). A placement seat (4) is fixedly installed on the top of the rotating seat (3). A metering box shell (5) is placed on the top of the placement seat (4). Alignment component, which is disposed on the top of the rotating seat (3) and cooperates with the metering box housing (5), is used to position the metering box housing (5) at the center of the placement seat (4); The clamping mechanism includes: a turntable (12), a second electric push rod (13), a swing rod (14), a rectangular rod (17), a pressure plate (18), two third electric push rods (20), a sliding sleeve (21), four fourth electric push rods (22), and four supports (23). The turntable (12) is located on the top of the processing table (1). The second electric push rod (13) is fixedly installed on the top of the turntable (12). One end of the swing rod (14) is fixedly installed on the output shaft of the second electric push rod (13). The top end of the rectangular rod (17) is rotatably connected to the bottom of the swing rod (14). The pressure plate (18) is fixedly installed on the rectangular rod (17). At the bottom, two third electric push rods (20) are fixedly installed on the rectangular rod (17), and the output shafts of the two third electric push rods (20) are fixedly installed on the top of the sliding sleeve (21). The sliding sleeve (21) is slidably sleeved on the rectangular rod (17). Four fourth electric push rods (22) are fixedly installed on the outside of the sliding sleeve (21). The output shafts of the fourth electric push rods (22) are fixedly installed on the corresponding brackets (23). Two fifth electric push rods (25) are fixedly installed on the outside of the brackets (23). A clamping plate (26) is fixedly installed on the output shaft of the fifth electric push rod (25). A rubber pad (27) is fixedly installed on one side of the clamping plate (26). A drive assembly is disposed on the top of the processing table (1). The drive assembly cooperates with the turntable (12) and is used to drive the turntable (12) to rotate. The limiting mechanism is located on the top of the processing table (1). The limiting component cooperates with the turntable (12) and is used to limit the rotation of the turntable (12).

2. The welding clamping fixture for a metering box according to claim 1, characterized in that, The alignment assembly includes four first electric push rods (6) and four centering plates (7). The four first electric push rods (6) are all fixedly installed on the top of the rotating seat (3). The output shaft of the first electric push rod (6) is fixedly installed on one side of the corresponding centering plate (7). One side of the four centering plates (7) is in contact with the front, rear, left and right sides of the metering box housing (5) respectively.

3. The welding clamping fixture for a metering box according to claim 1, characterized in that, The drive assembly includes a support shaft (8), a second motor (9), a first gear (10), and a second gear (11). The bottom end of the support shaft (8) is rotatably connected to the top of the processing table (1). The second motor (9) is fixedly installed on the top of the processing table (1). The first gear (10) is fixedly installed on the output shaft of the second motor (9). The second gear (11) is fixedly sleeved on the support shaft (8). The second gear (11) meshes with the first gear (10).

4. The welding clamping fixture for a metering box according to claim 1, characterized in that, The limiting mechanism includes a locking rod (30), a rotating shaft (32), a limiting rod (33), a torsion spring (35), and a positioning rod (36). The bottom end of the locking rod (30) is slidably connected to the top of the processing table (1). A slot (28) is provided on the turntable (12). The locking rod (30) can be disengaged from the slot (28). The rear end of the rotating shaft (32) is rotatably connected to the locking rod (30). The limiting rod (33) is fixedly installed at the front end of the rotating shaft (32). The torsion spring (35) is sleeved on the rotating shaft (32). The rear end of the torsion spring (35) is fixedly installed on the locking rod (30). The front end of the torsion spring (35) is fixedly installed on one side of the limiting rod (33). A limiting groove (34) is provided at the bottom of the limiting rod (33). The bottom end of the positioning rod (36) is fixedly installed at the top of the processing table (1). The top end of the positioning rod (36) cooperates with the limiting groove (34).

5. The welding clamping fixture for a metering box according to claim 4, characterized in that, The top of the processing table (1) is provided with a slide groove (29), and the bottom end of the clamping rod (30) is slidably connected in the slide groove (29). A spring (31) is fixedly installed on one side inner wall of the slide groove (29), and one end of the spring (31) is fixedly installed on the clamping rod (30).

6. The welding clamping fixture for a metering box according to claim 1, characterized in that, Two first telescopic rods (15) are fixedly installed on the top of the turntable (12), and the output shafts of the two first telescopic rods (15) are fixedly installed on the swing rod (14).

7. The welding clamping fixture for a metering box according to claim 1, characterized in that, The bottom of the swing arm (14) is fixedly mounted with a rotating seat (16), and the bottom of the rotating seat (16) is fixedly mounted on the top of the rectangular rod (17).

8. The welding clamping fixture for a metering box according to claim 1, characterized in that, The bottom of the pressure plate (18) is fixedly installed with an anti-slip pad (19), and the bottom of the anti-slip pad (19) is in contact with the bottom inner wall of the metering box housing (5).

9. The welding clamping fixture for a metering box according to claim 1, characterized in that, Four second telescopic rods (24) are fixedly installed on the outside of the sliding sleeve (21), and one end of the second telescopic rod (24) is fixedly installed on one side of the corresponding bracket (23).

10. The welding clamping fixture for a metering box according to claim 1, characterized in that, A welding machine mounting plate (37) is fixedly installed on the right end of the processing table (1), and a controller (38) is fixedly installed on the top of the processing table (1).

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