Electric energy metering box processing and welding device

Abstract

This invention provides a welding device for processing electricity metering boxes, belonging to the technical field of welding equipment. The invention includes a machine base, a box to be welded, a six-axis drive mechanism, a rotary seat, and a welding torch. It also includes an adaptive positioning mechanism mounted on a positioning platform and a stress relief mechanism mounted on the adaptive positioning mechanism. A bottom positioning reference surface is formed through a three-level nested guide system of limiting plates, limiting strips, and limiting frames. This, combined with an L-shaped positioning plate and a U-shaped elastic clamping component, constitutes a top positioning mechanism, achieving independent positioning and overall centering of the box frame and cover plate. The stress relief mechanism is linked to the adaptive positioning mechanism via a plug rod. It uses an elastic floating pressure roller to maintain constant pressure tension on the transmission belt and periodically taps the side wall of the box using a lever to create cyclic vibration, releasing residual stress in the weld. This invention enables rapid changeover of multiple box specifications, step-by-step unobstructed welding, and immediate stress relief after welding, effectively improving welding quality and production efficiency.

Description

Technical Field

[0001] This invention relates to the field of welding equipment technology, and more specifically, to a welding device for processing electrical energy metering boxes. Background Technology

[0002] Electricity metering boxes are key equipment in power systems used to install electricity meters. Their structure is typically welded together from a box frame and a cover plate. During the manufacturing process of electricity metering boxes, the welding process is the core step that determines the structural strength, sealing performance, and appearance quality of the box.

[0003] The existing welding devices have the following shortcomings in practical applications: First, electricity metering boxes come in various sizes and specifications. The positioning clamps of traditional welding devices are mostly fixed structures, which make it difficult to quickly adapt to the clamping requirements of different box sizes. When changing products, manual adjustment or replacement of clamps is required, which is cumbersome and inefficient. Second, electricity metering boxes are mostly made of thin-walled plates with a thickness of about 1.0-1.5mm. The thermal stress generated during welding can easily cause deformation of the box, which in turn affects the fitting accuracy between the box door and the box body and the appearance quality. Existing devices generally lack effective stress control methods, and an additional straightening process is usually required after welding. Moreover, the residual stress at the weld is not effectively released, which can easily lead to problems such as weld cracking during long-term use, seriously affecting the service life and operational safety of the product.

[0004] To address the aforementioned issues, it is necessary to develop a welding device for processing electricity metering boxes that can adapt to various box specifications, effectively control welding stress, and improve welding quality. Summary of the Invention

[0005] To overcome the above deficiencies, the present invention provides an electrical energy metering box processing and welding device, which aims to solve the problems mentioned in the background.

[0006] This invention is implemented as follows: This invention provides a welding device for processing electricity metering boxes, including a machine base and a box to be welded. The box to be welded consists of a box frame and a cover plate. The machine base is equipped with a six-axis drive mechanism and a rotary seat. The output end of the six-axis drive mechanism is connected to a welding torch, and the output end of the rotary seat is connected to a positioning table. The device also includes: An adaptive positioning mechanism is set on a positioning platform for positioning the boxes to be welded of different specifications; A stress relief mechanism, mounted on the adaptive positioning mechanism, is used to vibrate the welded housing to release stress at the weld joint.

[0007] As a preferred embodiment of the present invention, the adaptive positioning mechanism includes two sets of symmetrically distributed adjustment components and a limiting groove opened in the positioning platform. A lead screw is rotatably connected in the limiting groove. The lead screw is symmetrically provided with two reverse threads. A slider is threadedly connected to each reverse thread. The slider is slidably engaged with the limiting groove. A handwheel is provided at the end of the lead screw. A telescopic cylinder is fixedly connected to the top of the slider. The output end of the telescopic cylinder is fixedly connected to the bottom of the adjustment component.

[0008] In a preferred embodiment of the present invention, the adjustment assembly includes a mounting box and an L-shaped plate. A limit plate is provided on the side of the mounting box facing the housing frame. The mounting box contains a rack, a rack, and a gear. Both racks slide within the inner cavity of the mounting box and mesh with the gear. Racks are centrally symmetrically distributed around the central axis of the gear. A motor is mounted on the top of the mounting box. The output end of the motor passes through the top wall of the mounting box and is fixedly connected to the gear. The motors in the two adjustment assemblies are synchronously arranged.

[0009] In a preferred embodiment of the present invention, the ends of rack one and rack two are respectively fixedly connected to an L-shaped plate. A limit frame is fixedly connected to one side of the L-shaped plate connected to rack two, and a limit strip is fixedly connected to one side of the L-shaped plate connected to rack one. A positioning plate is fixedly connected to the top of the L-shaped plate, and a connecting seat is fixedly connected to the outside of the positioning plate. A guide wheel is rotatably connected inside the connecting seat. Frame one and frame two are respectively connected to the two ends of the outside of the connecting seat. A plug rod is fixedly connected to the end of frame one away from the connecting seat, and the plug rod is slidably inserted into frame two.

[0010] In a preferred embodiment of the present invention, the limiting frame is slidably engaged with the inner cavity of the limiting plate, the limiting strip is slidably engaged with the inner cavity of the limiting frame, the side walls of the limiting plate, the limiting strip and the limiting frame are flush, and a gap is provided between the limiting plate and the vertical side wall of the L-shaped plate.

[0011] In a preferred embodiment of the present invention, the positioning plate is L-shaped, the end of the second frame is provided with a baffle for limiting the insertion rod, and the cross-sections of both the first frame and the second frame are U-shaped.

[0012] In a preferred embodiment of the present invention, a U-shaped rod is rotatably connected to the top of the connecting seat, and a cavity is provided at the end of the U-shaped rod. A rubber seat is slidably connected in the cavity, and the rubber seat and the cavity are elastically connected by a spring. The U-shaped rod is located on the diagonal of the connecting seat.

[0013] In a preferred embodiment of the present invention, the stress relief mechanism includes a buffer box fixedly connected to the insert rod. The insert rod has a slot that matches the inner cavity of the buffer box. A movable block is slidably connected inside the buffer box. A pressure roller seat is fixedly connected to the side of the movable block facing the box to be welded. A pressure roller is rotatably connected inside the pressure roller seat. A limit rod is fixedly connected to the side of the movable block away from the box to be welded. The end of the limit rod penetrates the side wall of the buffer box. The movable block and the inner cavity of the buffer box are elastically connected by a second spring, which is sleeved on the outside of the limit rod.

[0014] As a preferred embodiment of the present invention, it further includes a second motor and a plurality of rollers. The plurality of rollers are evenly distributed within the second frame and the first frame and are rotatably connected to the second frame and the first frame. At least one roller is provided in each of the second frame and the first frame. The output end of the second motor is fixedly connected to one of the rollers. The rollers, guide rollers and pressure rollers are connected by a transmission belt. The rollers and guide rollers are located inside the transmission belt, and the pressure rollers are located outside the transmission belt. The rollers, guide rollers and pressure rollers are arranged in sequence.

[0015] In a preferred embodiment of the present invention, a lever plate is fixedly connected to the side wall of the roller. The lever plate is distributed on the upper and lower sides of the transmission belt. The side walls of the first frame and the second frame are provided with through slots for the lever plate to pass through. The distance between the end of the lever plate and the central axis of the roller is equal to the distance between the central axis of the roller and the outer side wall of the limiting plate. When the roller rotates, the end of the lever plate is in intermittent contact with the side wall of the box to be welded. The end of the lever plate has an arc-shaped structure.

[0016] The beneficial effects of this invention are: Rapid changeover is achieved through multi-stage adjustment, allowing for adaptation to different specifications of electricity metering boxes without changing fixtures, significantly improving production flexibility. A three-level nested guide structure is formed through the cooperation of the limiting frame, limiting plate, and limiting strip, achieving positioning of the bottom of the box frame. An L-shaped positioning plate, in conjunction with a U-shaped rod and rubber seat, presses the cover plate from above under the action of a spring, achieving three-dimensional positioning of the cover plate. These dual positioning mechanisms work together to ensure precise spatial alignment between the box frame and the cover plate before welding, avoiding problems such as welding misalignment and uneven gaps caused by positioning deviations. The adjustment components on the left and right sides form a rigid whole through plug-in cooperation. This structure improves the structural stability of the entire positioning mechanism during welding and avoids box tilting or positioning failure caused by asynchrony between the left and right sides.

[0017] The stress relief mechanism is linked with the adaptive positioning mechanism through the insertion rod, sharing the same frame structure. When the frame moves, causing a change in the length of the transmission belt path, the second spring automatically adjusts the position of the pressure roller through elastic deformation, so that the transmission belt always maintains a constant pressure tension. The second motor drives the roller to rotate, which drives the guide wheel and the pressure roller to move synchronously through the transmission belt. At the same time, the deflector plate on the side wall of the roller periodically contacts the side wall of the box intermittently with the rotation, forming an intermittent knocking action. This can form a continuous cyclic vibration on the four side walls of the box, which can effectively release the residual stress in the welding area and avoid box deformation and weld cracking.

[0018] The telescopic cylinder drives the entire adjustment assembly to move as a whole, realizing a step-by-step welding strategy of "welding the top cover plate first, then inserting the side cover plate, and then welding the side cover plate again". The gap set between the limiting plate and the vertical side wall of the L-shaped plate corresponds to the welding area between the side cover plate and the box frame. When the adjustment assembly moves as a whole, the welding area that was originally covered by the positioning plate and the limiting plate is exposed. This step-by-step welding strategy effectively solves the technical problem of the positioning structure covering the weld in traditional welding devices, ensuring that the welding torch is always in the best welding posture and can achieve high-quality continuous welding. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the rotating seat structure of the present invention; Figure 3 This is a schematic diagram of the adaptive positioning mechanism and welding torch structure of the present invention; Figure 4 This is a schematic diagram of the adaptive positioning mechanism structure of the present invention; Figure 5 This is a top view schematic diagram of the adaptive positioning mechanism of the present invention; Figure 6 This is a schematic diagram of the structure of the box to be welded and the adaptive positioning mechanism of the present invention; Figure 7 This is a schematic diagram of the cross-sectional structure of the limiting groove of the present invention; Figure 8 This is a schematic diagram of the distribution structure of the slider and telescopic cylinder of the present invention; Figure 9 This is a schematic diagram of the internal structure of the mounting box of the present invention; Figure 10This is a schematic diagram of the partially exploded structure of the adaptive positioning mechanism of the present invention; Figure 11 This is a schematic diagram of the cross-sectional structure of the U-shaped rod of the present invention; Figure 12 This is a schematic cross-sectional view of the buffer box structure of the present invention; Figure 13 This is the invention Figure 12 Enlarged structural diagram at point A in the middle.

[0021] In the diagram: 1. Machine base; 2. Rotary seat; 3. Six-axis drive mechanism; 4. Welding torch; 5. Positioning table; 6. Mounting box; 7. Connecting seat; 8. Buffer box; 9. Frame one; 10. Box frame; 51. Limiting groove; 52. Lead screw; 53. Slider; 54. Telescopic cylinder; 61. Rack one; 62. Rack two; 63. Gear; 64. Limiting plate; 65. L-shaped plate; 66. Positioning plate; 71. Guide wheel; 7 2. U-shaped rod; 73. Rubber seat; 74. Spring 1; 75. Transmission belt; 81. Movable block; 82. Pressure roller seat; 90. Through groove; 91. Insert rod; 92. Frame 2; 93. Roller; 94. Motor 2; 101. Cover plate; 521. Handwheel; 611. Limiting strip; 621. Limiting frame; 631. Motor 1; 811. Limiting rod; 812. Spring 2; 821. Pressure roller; 931. Paddle plate. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] Example 1: This example provides a welding device for processing an electricity metering box. Please refer to... Figures 1 to 11 The device includes a machine base 1 and a box to be welded. The box to be welded consists of a box frame 10 and a cover plate 101. The machine base 1 is equipped with a six-axis drive mechanism 3 and a rotary seat 2. The output end of the six-axis drive mechanism 3 is connected to a welding torch 4, and the output end of the rotary seat 2 is connected to a positioning table 5. The six-axis drive mechanism 3 is used to drive the welding torch 4 to move freely in three-dimensional space to realize automated welding of the weld. The rotary seat 2 is used to drive the positioning table 5 to rotate, so that the welding angle of the box to be welded can be adjusted as needed.

[0024] The core improvement of this embodiment lies in the following: an adaptive positioning mechanism and a stress relief mechanism are provided. The adaptive positioning mechanism is set on the positioning platform 5 and is used to position the boxes of different specifications to be welded. The stress relief mechanism is set on the adaptive positioning mechanism and is used to vibrate the welded box to release the stress at the weld. Through the synergistic effect of the above two mechanisms, the problem of rapid positioning of boxes of various specifications is solved, as well as the problem of box deformation caused by welding stress is solved.

[0025] Specifically, such as Figures 3 to 7 As shown, the adaptive positioning mechanism includes two symmetrically distributed adjustment components and a limiting groove 51 opened in the positioning table 5. A lead screw 52 is rotatably connected in the limiting groove 51. The lead screw 52 is symmetrically provided with two reverse threads. A slider 53 is threadedly connected to each reverse thread. The slider 53 slides in the limiting groove 51. A handwheel 521 is provided at the end of the lead screw 52. The operator can drive the two sliders 53 to move synchronously towards or away from each other by rotating the handwheel 521, thereby adjusting the distance between the two sets of adjustment components to adapt to the different widths of the box to be welded. A telescopic cylinder 54 (such as an electric actuator or a pneumatic cylinder) is fixedly connected to the top of the slider 53. The output end of the telescopic cylinder 54 is fixedly connected to the bottom of the adjustment component. The telescopic cylinder 54 is used to drive the adjustment component to rise and fall to adapt to the different heights of the box to be welded, and to provide clearance space for the weld during welding operations to avoid interference with the welding torch 4.

[0026] The purpose of adopting the above structure is to achieve synchronous adjustment of the two sets of adjustment components through the reverse thread structure of the lead screw 52, ​​ensuring symmetrical positioning of the box in the width direction; and to achieve independent adjustment in the height direction through the telescopic cylinder 54, so that the device can flexibly adapt to various sizes of power metering boxes and complete quick model change without changing the fixture.

[0027] like Figures 6 to 10 As shown, the adjustment assembly includes a mounting box 6 and an L-shaped plate 65. A limit plate 64 is provided on the side of the mounting box 6 facing the housing frame 10. The mounting box 6 is equipped with a rack 61, a rack 62 and a gear 63. Both racks 61 and 62 slide in the inner cavity of the mounting box 6 and are meshed with the gear 63. The racks 61 and 62 are centrally symmetrically distributed around the central axis of the gear 63. A motor 631 is installed on the top of the mounting box 6. The output end of the motor 631 passes through the top wall of the mounting box 6 and is fixedly connected to the gear 63. The motors 631 in the two adjustment assemblies are set synchronously, that is, the two motors 631 start at the same time and drive their respective gears 63 to rotate in the same direction and at the same speed.

[0028] The purpose of the above-mentioned structure is to achieve synchronous opposite or backward movement of the two L-shaped plates 65 through the meshing transmission of gear 63 with rack 61 and rack 62, thereby adjusting the clamping position of the positioning component on the housing frame 10. Since rack 61 and rack 62 are centrally symmetrically distributed, when gear 63 rotates, the two racks move in opposite directions but with equal displacement, ensuring the housing frame 10 is centered and positioned in the horizontal direction. The synchronous setting of the two motors 631 ensures the synchronous clamping of the housing frame 10 by the two sets of adjustment components, avoiding the housing from tilting due to asynchronous adjustment.

[0029] like Figures 9 to 10 As shown, the ends of rack 1 61 and rack 2 62 are respectively fixedly connected to an L-shaped plate 65. A limit frame 621 is fixedly connected to one side of the L-shaped plate 65 connected to rack 2 62, and a limit strip 611 is fixedly connected to one side of the L-shaped plate 65 connected to rack 1 61. A positioning plate 66 is fixedly connected to the top of the L-shaped plate 65. A connecting seat 7 is fixedly connected to the outside of the positioning plate 66. A guide wheel 71 is rotatably connected inside the connecting seat 7. Frame 1 9 and frame 2 92 are respectively connected to the two ends of the outside of the connecting seat 7. A plug rod 91 is fixedly connected to the end of frame 1 9 away from the connecting seat 7. The plug rod 91 is slidably inserted into frame 2 92.

[0030] It should be noted that the inner cavity of the limiting frame 621 and the limiting plate 64 slides together, and the inner cavity of the limiting strip 611 and the limiting frame 621 slides together. The side walls of the limiting plate 64, the limiting strip 611, and the limiting frame 621 are flush, so that the side walls of the limiting plate 64, the limiting strip 611, and the limiting frame 621 can jointly form a flat positioning reference surface, so as to fit tightly with the bottom side wall of the box to be welded, thereby improving the positioning accuracy. In addition, there is a gap between the limiting plate 64 and the vertical side wall of the L-shaped plate 65. This gap corresponds to the welding area between the side cover plate 101 and the box frame 10, providing clearance space for the operation of the welding gun 4.

[0031] The purpose of adopting the above-mentioned structure is to form a multi-layered nested guide structure through the step-by-step sliding cooperation of the limiting plate 64, the limiting strip 611, and the limiting frame 621, so as to ensure the stability and straightness of the L-shaped plate 65 during the movement. At the same time, the side walls of the three are flush, so that the entire positioning assembly always maintains planar consistency during the adjustment process, providing a flat positioning reference surface for the box frame 10 and improving the alignment accuracy before welding.

[0032] Furthermore, the positioning plate 66 is L-shaped, and the end of the second frame 92 is provided with a baffle for limiting the insertion rod 91. The cross-sections of the first frame 9 and the second frame 92 are both U-shaped. The U-shaped cross-section structure not only improves the rigidity of the frame, but also provides space for the installation of internal components.

[0033] Reference Figure 9 and Figure 11 A U-shaped rod 72 is rotatably connected to the top of the connecting seat 7. The end of the U-shaped rod 72 is provided with a cavity, and a rubber seat 73 is slidably connected in the cavity. The rubber seat 73 and the cavity are elastically connected by a spring 74. The U-shaped rod 72 is located on the diagonal of the connecting seat 7, which can avoid interference with the welding torch 4 during welding. The U-shaped rod 72 can rotate around the connecting seat 7 and can be flipped to a non-working position when not in use. When in use, the U-shaped rod 72 is flipped above the cover plate 101. The rubber seat 73 is pressed against the upper surface of the cover plate 101 by the elastic force of the spring 74, which forms an auxiliary positioning for the cover plate 101 and prevents the cover plate 101 from warping or shifting during welding.

[0034] In this embodiment, the operator adjusts the width spacing between the two sets of adjustment components using handwheel 521 according to the specifications of the box to be welded, and adjusts the height position of the adjustment components using telescopic cylinder 54 to complete the initial coarse positioning; then, the box frame 10 is placed on the positioning table 5, and the two motors 631 are started. Motor 631 drives gear 63 to rotate, and gear 63 drives rack 61 and rack 62 to move synchronously in opposite directions. Rack 61 and rack 62 respectively drive the L-shaped plate 6 connected to them. 5. Move towards each other, so that the positioning plates 66 on both sides clamp and position it from the outside of the box frame 10. During this process, the limiting strip 611 slides along the inner cavity of the limiting frame 621, and the limiting frame 621 slides along the inner cavity of the limiting plate 64, ensuring that the L-shaped plate 65 moves smoothly and in an accurate direction. Then, place the cover plate 101 in the predetermined position of the box frame 10, flip the U-shaped rod 72, so that the rubber seat 73 presses the upper surface of the cover plate 101 under the action of the spring 74, and complete the auxiliary positioning of the cover plate 101.

[0035] At this point, the box to be welded has been fully positioned. The operator or control system starts the six-axis drive mechanism 3 to drive the welding gun 4 to weld the connection between the box frame 10 and the cover plate 101 along the predetermined trajectory. During the welding process, the positioning table 5 can be rotated by the rotating seat 2 to adjust the welding angle so that the welding gun 4 is always in the best welding posture.

[0036] The core design of this embodiment lies in constructing a dual positioning mechanism that combines bottom positioning and top positioning: Bottom positioning: This is achieved through the cooperation of the limiting plate 64, the limiting strip 611, the limiting frame 621, and the L-shaped plate 65. Specifically, when rack one 61 and rack two 62 move towards each other under the drive of gear 63, the limiting strip 611 slides along the inner cavity of the limiting frame 621, and the limiting frame 621 slides along the inner cavity of the limiting plate 64, forming a three-level nested guide structure. During this process, the side walls of the limiting plate 64, the limiting strip 611, and the limiting frame 621 remain flush, together forming a flat bottom positioning reference surface. This reference surface is in close contact with the bottom side wall of the box to be welded, achieving precise positioning of the bottom of the box frame 10.

[0037] Top positioning: This is achieved through the cooperation of L-shaped plate 65 and positioning plate 66. The top of L-shaped plate 65 is fixedly connected to positioning plate 66. Positioning plate 66 is L-shaped. Its horizontal section is used to support cover plate 101, and its vertical section is used to limit the lateral movement of cover plate 101. After the box frame 10 completes bottom positioning, cover plate 101 is placed on the horizontal section of positioning plate 66. The vertical section of positioning plate 66 limits cover plate 101 from the side. At the same time, U-shaped rod 72 at the top of connecting seat 7 flips to the top of cover plate 101. Rubber seat 73 presses cover plate 101 from above under the elastic force of spring 74, realizing three-dimensional positioning of the top position of cover plate 101.

[0038] By combining frame 1 (9) and frame 2 (92), the top support structure is connected into a whole. Specifically, frame 1 (9) and frame 2 (92) are connected to the outer ends of the connecting seat 7, respectively. The insertion rod 91 at the end of frame 1 (9) is slidably inserted into frame 2 (92), so that the adjustment components on the left and right sides form a rigid whole through the insertion and cooperation of frame 1 (9) and frame 2 (92). This design not only improves the structural stability of the entire positioning mechanism, but also ensures the synchronicity of the adjustment components on both sides during the lifting process, avoiding positioning deviation caused by left and right asynchrony.

[0039] This embodiment also employs a step-by-step welding strategy, achieving unobstructed continuous welding through alternating bottom and top positioning: Step 1: Weld the connection between the top cover plate 101 and the box frame 10. The housing frame 10 is placed on the positioning platform 5. The L-shaped plate 65 is driven to move towards each other by the motor 631, so that the bottom positioning mechanism (limiting plate 64, limiting strip 611, limiting frame 621) clamps the housing frame 10 from the bottom side wall. At the same time, the cover plate 101 is placed on the horizontal section of the positioning plate 66, and the U-shaped rod 72 is flipped to press the cover plate 101 from above. At this time, the area to be welded is the connection between the cover plate 101 and the top of the housing frame 10. This area is located above the positioning plate 66. The six-axis drive mechanism 3 is started, and the welding gun 4 is driven to weld along the top weld seam trajectory. After the middle section welding is completed, the control system starts the telescopic cylinder 54. The telescopic cylinder 54 drives the entire adjustment assembly to move down, exposing the part that was originally covered by the positioning plate 66, and then welding is carried out. This completes the connection between the top cover plate 101 and the housing frame 10.

[0040] Step 2: Weld the connection between the side cover plate 101 (not shown in the figure) and the box frame 10. After the connection between the top cover plate 101 and the housing frame 10 is welded, the control system is reset, the side cover plate 101 is inserted, and the above process is repeated to complete the welding of the middle section of the side cover plate 101. Since there is a gap between the vertical side wall of the limiting plate 64 and the L-shaped plate 65, and this gap corresponds to the welding area between the side cover plate 101 and the housing frame 10, when the adjustment assembly moves as a whole, the side welding area that was originally covered by the limiting plate 64, the positioning plate 66 and other structures is completely exposed. After the side welding area is exposed, the six-axis drive mechanism 3 drives the welding gun 4 to weld along the side weld trajectory again. Since the other side welding areas are no longer covered, the welding gun 4 can move freely to achieve high-quality side welding. It should be noted that the side cover plates 101 can be welded on multiple sides of the housing frame 10 in sequence. The specific order can be flexibly arranged according to actual production needs.

[0041] In this embodiment, the bottom positioning reference surface formed by the limiting plate 64, limiting strip 611, and limiting frame 621 cooperates with the top positioning mechanism composed of L-shaped plate 65, positioning plate 66, and U-shaped rod 72 to achieve independent positioning and overall alignment of the box frame 10 and cover plate 101, ensuring positional accuracy before welding; the adjustment components on the left and right sides form a rigid whole through the plug-in cooperation of frame one 9 and frame two 92, improving structural stability, ensuring synchronization during the lifting process, and avoiding positioning deviation; the telescopic cylinder 54 drives the entire adjustment component to move downward as a whole, realizing " The step-by-step welding process of "welding the top cover first, then inserting the side cover, and then welding the side cover again," combined with the gap design between the limiting plate 64 and the L-shaped plate 65, ensures that the welding area is fully exposed, preventing the positioning structure from obscuring the weld. Multi-level rapid adjustment is achieved by adjusting the width with the lead screw 52, ​​adjusting the height with the telescopic cylinder 54, and adjusting the clamping position with the gear and rack. This allows for adaptation to different specifications of boxes without changing the fixtures, significantly improving production efficiency. The elastic clamping structure of the U-shaped rod 72 and the rubber seat 73 effectively prevents the cover plate 101 from shifting during the welding process, improving welding quality.

[0042] Example 2: This example provides a detailed description of the stress relief mechanism based on Example 1. Please refer to the provided text. Figures 3 to 13 .

[0043] like Figure 12 , Figure 13 As shown, the stress relief mechanism includes a buffer box 8 fixedly connected to the insert rod 91. The insert rod 91 has a slot that matches the inner cavity of the buffer box 8. A movable block 81 is slidably connected inside the buffer box 8. A pressure roller seat 82 is fixedly connected to the side of the movable block 81 facing the box to be welded. A pressure roller 821 is rotatably connected inside the pressure roller seat 82. A limit rod 811 is fixedly connected to the side of the movable block 81 away from the box to be welded. The end of the limit rod 811 penetrates the side wall of the buffer box 8. The movable block 81 and the inner cavity of the buffer box 8 are elastically connected by a second spring 812. The second spring 812 is sleeved on the outside of the limit rod 811.

[0044] The purpose of the above structure is as follows: the buffer box 8 is fixed on the insertion rod 91 and moves with the insertion rod 91, thereby linking the stress relief mechanism with the adaptive positioning mechanism. The pressure roller 821 maintains elastic contact with the transmission belt 75 under the elastic force of the spring 812, which can apply sufficient pressing force without causing damage to the surface of the transmission belt 75 due to rigid contact. The limiting rod 811 plays a guiding and limiting role to prevent the movable block 81 from detaching during movement.

[0045] Furthermore, it also includes a second motor 94 and several rollers 93. The rollers 93 are evenly distributed within the second frame 92 and the first frame 9, and are rotatably connected to the second frame 92 and the first frame 9. At least one roller 93 is provided in each second frame 92 and the first frame 9. The output end of the second motor 94 is fixedly connected to one of the rollers 93. The rollers 93, the guide wheel 71 and the pressure roller 821 are connected by a transmission belt 75. The rollers 93 and the guide wheel 71 are located inside the transmission belt 75, and the pressure roller 821 is located outside the transmission belt 75. The rollers 93, the guide wheel 71 and the pressure roller 821 are arranged in sequence.

[0046] It should be noted that when frames 1 (9) and 2 (92) move with the adjusting assembly, the path length of the transmission belt 75 changes, and the force exerted by the transmission belt 75 on the pressure roller 821 changes accordingly. At this time, spring 2 (812) automatically adjusts the position of the pressure roller 821 through elastic deformation: when the transmission belt 75 becomes loose, spring 2 (812) pushes the movable block 81 to move inward, so that the pressure roller 821 presses the transmission belt 75, compensating for the increase in the length of the transmission belt 75; when the transmission belt 75 becomes tight, the transmission belt 75 overcomes the elastic force of spring 2 (812) and pushes the pressure roller 821 to move outward, releasing the excess length. Through this elastic adaptive adjustment, the pressure roller 821 always applies a constant pressure to the transmission belt 75, so that the transmission belt 75 always maintains an appropriate tension after the frame moves, ensuring the continuity and stability of power transmission, thereby ensuring that the stress relief mechanism can work continuously and reliably during the step-by-step welding process.

[0047] Furthermore, a lever plate 931 is fixedly connected to the side wall of the roller 93. The lever plate 931 is distributed on the upper and lower sides of the transmission belt 75. The side walls of frame 1 9 and frame 2 92 are provided with through slots 90 for the lever plate 931 to pass through. The distance between the end of the lever plate 931 and the central axis of the roller 93 is equal to the distance between the central axis of the roller 93 and the outer side wall of the limiting plate 64. When the roller 93 rotates, the end of the lever plate 931 makes intermittent contact with the side wall of the box to be welded. The end of the lever plate 931 has an arc-shaped structure to reduce the impact and wear when in contact with the side wall of the box.

[0048] The purpose of the above-mentioned structure is as follows: the roller 93 is driven to rotate by the motor 94, and the roller 93 drives the transmission belt 75 to move. During the movement, the pressure roller 821 applies pressure to the transmission belt 75 so that it can maintain the transmission effect after the frame moves. At the same time, the agitator 931 on the roller 93 periodically agitates the side wall of the box to be welded as the roller 93 rotates, forming an intermittent knocking action. By forming a continuous cyclic vibration on the four side walls of the box, the residual stress in the welding area can be effectively released.

[0049] In this embodiment, after the welding of the box to be welded is completed, the control system starts motor 2 94, which drives the roller 93 connected to it to rotate. The roller 93 drives other rollers 93, guide wheel 71 and pressure roller 821 to move synchronously through transmission belt 75.

[0050] During the movement of the transmission belt 75, the pressure roller 821 maintains elastic contact with the transmission belt 75 under the elastic force of the spring 812, applying constant pressure to the transmission belt 75 to ensure that the transmission belt 75 maintains good tension and transmission effect after the movement of each frame. At the same time, when the roller 93 rotates, it drives the dial plate 931 to rotate synchronously. Since the distance between the end of the dial plate 931 and the central axis of the roller 93 is equal to the distance between the central axis of the roller 93 and the outer wall of the limiting plate 64, when the dial plate 931 rotates to the position facing the side wall of the box, its end just contacts the side wall of the box, forming an intermittent knocking action. The dial plate 931 knocks the side wall of the box twice (once at the top and once at the bottom) for each rotation. The knocking frequency is proportional to the rotation speed of the roller 93. The movement of the transmission belt 75 and the periodic knocking of the dial plate 931 work together to form a continuous cyclic vibration on the four side walls of the box, which promotes the effective release of residual stress in the welding area and avoids box deformation and weld cracking caused by stress concentration.

[0051] By performing vibration stress release immediately after welding, the enclosure does not need to be transferred to other equipment, avoiding enclosure deformation and weld cracking caused by long-term accumulation of residual stress, thus improving production efficiency. The stress release mechanism is linked with the adaptive positioning mechanism through the insertion rod 91, sharing the same frame structure, eliminating the need for additional independent drive and transmission systems, resulting in a compact structure and small footprint. The intermittent tapping of the drive plate 931 by the transmission belt 75 creates a composite vibration mode on the side wall of the enclosure, resulting in better stress release. By adjusting the speed of the motor 94, the vibration frequency and intensity can be flexibly controlled to adapt to the stress release needs of enclosures of different materials and thicknesses.

[0052] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the invention by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the invention should be included within the scope of protection of the invention.

Claims

1. A welding device for processing an electricity metering box, comprising a machine base (1) and a box to be welded, wherein the box to be welded is composed of a box frame (10) and a cover plate (101), the machine base (1) is provided with a six-axis drive mechanism (3) and a rotary seat (2), the output end of the six-axis drive mechanism (3) is connected to a welding torch (4), and the output end of the rotary seat (2) is connected to a positioning table (5), characterized in that, Also includes: An adaptive positioning mechanism is set on the positioning table (5) for positioning the boxes to be welded of different specifications; A stress relief mechanism, mounted on the adaptive positioning mechanism, is used to vibrate the welded housing to release stress at the weld joint.

2. The electrical energy metering box processing and welding device according to claim 1, characterized in that, The adaptive positioning mechanism includes two sets of symmetrically distributed adjustment components and a limiting groove (51) opened in the positioning platform (5). A lead screw (52) is rotatably connected in the limiting groove (51). Two reverse threads are symmetrically provided on the lead screw (52). A slider (53) is threadedly connected to each reverse thread. The slider (53) slides in cooperation with the limiting groove (51). A handwheel (521) is provided at the end of the lead screw (52). A telescopic cylinder (54) is fixedly connected to the top of the slider (53). The output end of the telescopic cylinder (54) is fixedly connected to the bottom of the adjustment component.

3. The electrical energy metering box processing and welding device according to claim 2, characterized in that, The adjustment assembly includes a mounting box (6) and an L-shaped plate (65). The mounting box (6) has a limit plate (64) on one side facing the box frame (10). The mounting box (6) is provided with a rack (61), a rack (62) and a gear (63). The rack (61) and the rack (62) are both slidably engaged with the inner cavity of the mounting box (6), and the rack (61) and the rack (62) are both meshed with the gear (63). The rack (61) and the rack (62) are centrally symmetrically distributed around the central axis of the gear (63). A motor (631) is installed on the top of the mounting box (6). The output end of the motor (631) passes through the top wall of the mounting box (6) and is fixedly connected to the gear (63). The motors (631) in the two adjustment assemblies are set synchronously.

4. The power metering box processing and welding device according to claim 3, characterized in that, The ends of rack one (61) and rack two (62) are respectively fixedly connected to an L-shaped plate (65). A limit frame (621) is fixedly connected to one side of the L-shaped plate (65) connected to rack two (62). A limit strip (611) is fixedly connected to one side of the L-shaped plate (65) connected to rack one (61). A positioning plate (66) is fixedly connected to the top of the L-shaped plate (65). A connecting seat (7) is fixedly connected to the outside of the positioning plate (66). A guide wheel (71) is rotatably connected inside the connecting seat (7). Frame one (9) and frame two (92) are respectively connected to the two ends of the outside of the connecting seat (7). A plug rod (91) is fixedly connected to the end of frame one (9) away from the connecting seat (7). The plug rod (91) is slidably inserted into the frame two (92).

5. The power metering box processing and welding device according to claim 4, characterized in that, The limiting frame (621) slides in conjunction with the inner cavity of the limiting plate (64), the limiting strip (611) slides in conjunction with the inner cavity of the limiting frame (621), the side walls of the limiting plate (64), the limiting strip (611), and the limiting frame (621) are flush, and a gap is provided between the limiting plate (64) and the vertical side wall of the L-shaped plate (65).

6. The power metering box processing and welding device according to claim 4, characterized in that, The positioning plate (66) is L-shaped, and the end of the second frame (92) is provided with a baffle for limiting the insertion rod (91). The cross sections of the first frame (9) and the second frame (92) are both U-shaped.

7. The electrical energy metering box processing and welding device according to claim 4, characterized in that, The top of the connecting seat (7) is rotatably connected to a U-shaped rod (72), and the end of the U-shaped rod (72) is provided with a cavity. A rubber seat (73) is slidably connected in the cavity. The rubber seat (73) and the cavity are elastically connected by a spring (74). The U-shaped rod (72) is located on the diagonal of the connecting seat (7).

8. The power metering box processing and welding device according to claim 4, characterized in that, The stress relief mechanism includes a buffer box (8) fixedly connected to the insert rod (91). The insert rod (91) has a slot that matches the inner cavity of the buffer box (8). A movable block (81) is slidably connected inside the buffer box (8). A pressure roller seat (82) is fixedly connected to the side of the movable block (81) facing the box to be welded. A pressure roller (821) is rotatably connected inside the pressure roller seat (82). A limit rod (811) is fixedly connected to the side of the movable block (81) away from the box to be welded. The end of the limit rod (811) penetrates the side wall of the buffer box (8). The movable block (81) and the inner cavity of the buffer box (8) are elastically connected by a second spring (812). The second spring (812) is sleeved on the outside of the limit rod (811).

9. The electrical energy metering box processing and welding device according to claim 8, characterized in that, It also includes a second motor (94) and several rollers (93). Several rollers (93) are evenly distributed in the second frame (92) and the first frame (9) and are rotatably connected to the second frame (92) and the first frame (9). At least one roller (93) is provided in each second frame (92) and the first frame (9). The output end of the second motor (94) is fixedly connected to one of the rollers (93). The rollers (93), guide wheels (71) and pressure rollers (821) are connected by a transmission belt (75). The rollers (93) and guide wheels (71) are located inside the transmission belt (75), and the pressure rollers (821) are located outside the transmission belt (75). The rollers (93), guide wheels (71) and pressure rollers (821) are arranged in sequence.

10. The power metering box processing and welding device according to claim 9, characterized in that, The roller (93) is fixedly connected to a lever plate (931) on its side wall. The lever plate (931) is distributed on the upper and lower sides of the transmission belt (75). The side walls of the first frame (9) and the second frame (92) are provided with through slots (90) for the lever plate (931) to pass through. The distance between the end of the lever plate (931) and the central axis of the roller (93) is equal to the distance between the central axis of the roller (93) and the outer side wall of the limiting plate (64). When the roller (93) rotates, the end of the lever plate (931) is in intermittent contact with the side wall of the box to be welded. The end of the lever plate (931) has an arc-shaped structure.

Images