Split welding process for ammeter detection equipment special-shaped sheet metal cover

Abstract

The application discloses a split type welding process for a special-shaped sheet metal cover of an electric meter detection device, and particularly relates to the electric meter detection device welding technical field.The application is characterized in that a streamline part and an automatic tailor-welding unit are arranged, a plurality of sawtooth transition structures are formed on the streamline part, the streamline part is more easily attached to a target curvature under the action of external force, and thus a required streamline transition shape is formed.The automatic tailor-welding unit is used for tailor-welding a joint of the streamline part and the special-shaped sheet metal cover, and gap or interval parts formed between the sawtooth parts are supplemented by welding, so that the structural continuity and the overall strength of the streamline part after forming are restored, the overall forming of the split type streamline surface is realized, the rapid manufacturing of the complex special-shaped cover is completed without the condition of a special large stamping die, the development cost and the time cost of the special die are reduced, the overall die forming is replaced by the split type welding forming, and the streamline surface which is originally difficult to be formed at one time is split into the streamline parts which are easy to be bent.

Description

Technical Field

[0001] This invention relates to the field of welding technology for electricity meter testing equipment, specifically to a disassembled welding process for irregularly shaped sheet metal outer casings of electricity meter testing equipment. Background Technology

[0002] Electricity meter testing equipment is widely used in the calibration, testing, aging, and metering performance testing of electricity meters. This type of equipment typically integrates a testing unit, control unit, wiring components, display components, and protective structure, placing high demands on the structural strength, installation accuracy, heat dissipation performance, and appearance quality of the equipment casing. As a crucial component of the equipment's external protection and support, the sheet metal casing not only serves to prevent dust, provide protection, enhance aesthetics, and bear structural loads, but also directly impacts the overall assembly efficiency and ease of subsequent maintenance.

[0003] Existing meter testing equipment typically features irregularly shaped sheet metal covers with multiple opposite-direction folds, complex convoluted contours, local deep cavity structures, and streamlined curved surface transition areas. When using traditional integral bending or integral mold forming methods, these are easily limited by the bending equipment stroke, mold interference, forming sequence, and surface processing capabilities, resulting in problems such as difficulty in integral forming, high processing difficulty, poor dimensional consistency, and difficulty in ensuring assembly accuracy. At the same time, for streamlined curved surface areas, if a dedicated large stamping die is used for integral forming, there are also problems such as long mold development cycle, high cost, poor flexibility, and difficulty in prototype trial production and small-batch rapid production. Summary of the Invention

[0004] The purpose of this invention is to provide a disassembled welding process for the irregular sheet metal outer casing of an electricity meter testing device, so as to solve the problems mentioned in the background art.

[0005] The main technical problem solved by this invention is: When using traditional integral bending or integral mold forming methods, the processing capability of curved surfaces is easily limited, resulting in problems such as difficulty in integral forming, poor dimensional consistency, and difficulty in ensuring assembly accuracy.

[0006] This invention can be achieved through the following technical solutions: The disassembly welding process for the irregularly shaped sheet metal outer casing of the electricity meter testing equipment includes the following steps: Step 1: Install the irregular sheet metal cover on the sliding clamping unit at the bottom of the support top plate, and align it with the positioning frame installed on the welding frame by sliding it. Step 2: After alignment, the automatic screw-tightening unit fixes the irregular sheet metal cover to the positioning frame; Step 3: Next, an external robotic arm aligns the streamlined part into the groove on the edge of the irregular sheet metal cover and bends it into shape. Step 4: The automatic welding unit welds the joints between the streamlined parts and the irregular sheet metal cover, then welds the gaps in the streamlined parts, and finally scrapes off the putty and polishes the welded areas of the streamlined parts after forming.

[0007] A further technical improvement of the present invention is that: the welding frame includes a base plate, a supporting vertical plate is fixed to the edge of the upper surface of the base plate, and a supporting top plate is fixed to the top surface of the supporting vertical plate; The positioning frame has several mounting cylinders on one side surface that are fixedly connected to one surface of the supporting vertical plate.

[0008] A further technical improvement of the present invention is that: the sliding clamping unit includes a linear slide rail 1 disposed on the bottom surface of the supporting top plate, a top plate 1 that slides along the bottom surface of the supporting top plate is mounted on the slider of the linear slide rail 1, an electric push rod 1 is mounted on the lower surface of the top plate, an adjusting seat 1 is fixed to the pushing end of the electric push rod 1, and two adsorption clamping plates that move synchronously closer and adsorb and clamp the surface of the irregular sheet metal cover are slidably mounted on the bottom of the adjusting seat 1.

[0009] A further technical improvement of the present invention is that: each adsorption clamp has multiple suction cups on its surface, and the multiple suction cups are connected to the negative pressure pump through the same negative pressure pipeline.

[0010] A further technical improvement of the present invention is that: the automatic wire-twisting unit includes a mounting plate disposed on another surface of the supporting vertical plate, and a limiting rod that slides in cooperation with the mounting plate is fixed on the side surface of the supporting vertical plate away from the positioning frame; A linear cylinder for pushing the mounting plate is installed on the side surface of the support vertical plate facing the positioning frame. The surface of the mounting plate is equipped with several electric screwdrivers that embed screws into the positioning bracket and the alignment slots of the irregular sheet metal cover. The surface of the support vertical plate is provided with through holes for the corresponding electric screwdriver bits to pass through.

[0011] A further technical improvement of the present invention is that: three reinforcing ribs are fixed on the side surface of the positioning frame near the supporting vertical plate, and four sets of weight-reducing parts are provided on the surface of the positioning frame. Each reinforcing rib is located at the vertical central axis of two adjacent sets of weight-reducing parts, and each set of weight-reducing parts includes several weight-reducing holes.

[0012] A further technical improvement of the present invention is that the surface of the streamlined part is provided with a plurality of serrated portions for bending and forming.

[0013] A further technical improvement of the present invention is that the automatic welding unit includes an electric push rod II, the pushing end of which is fixed with an adjustment seat II, and a screw driven by a forward and reverse motor is installed inside the adjustment seat II. The screw has two threaded portions in different directions, and each threaded portion is threaded with a welding component that slides along the bottom surface of the adjustment seat II.

[0014] A further technical improvement of the present invention is that: the welded component includes a moving plate, the bottom of which is rotatably connected to a flipping plate via a rotary cylinder, the rotation center of which coincides with the center of the arc surface of the irregular sheet metal cover, the end of which is fixed with a folding plate that is inclined toward the arc edge of the irregular sheet metal cover, the inner side of which is fixed with a second linear slide rail, and the sliding block of the second linear slide rail is equipped with an air-cooled welding gun for repairing welds at the weld joints and gaps.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. By setting up streamlined components and automatic welding units, several sawtooth transition structures are formed on the streamlined components, making it easier for the streamlined components to conform to the target curvature under external force, thereby forming the required streamlined transition shape. The automatic welding unit welds the joints between the streamlined components and the irregular sheet metal cover, and repairs the gaps or intervals formed between the sawtooth parts, thereby restoring the structural continuity and overall strength of the streamlined components after forming. This achieves the overall forming of the split streamlined surface, enabling the rapid manufacturing of complex irregular covers without the need for special large stamping dies, reducing the development cost and time cost of special dies. By replacing the overall die forming with split welding forming, the streamlined surface that was originally difficult to form in one go is split into easily bendable streamlined components. 2. By setting a positioning frame that can be detachably connected to the irregular sheet metal cover, the overall position of the cover can be reliably locked before welding, avoiding the displacement of the mounting hole position, edge contour and spatial posture caused by heat input, stress release or external force interference during subsequent splicing, welding and local bending forming processes, thereby effectively ensuring the key mounting hole position and overall assembly accuracy of the product. 3. By setting up an automatic screw-tightening unit, a linear cylinder pushes the mounting plate forward along the guide direction of the limiting rod, causing several electric screwdrivers on the mounting plate to simultaneously approach the support vertical plate. Then, the screwdriver bits of each electric screwdriver pass through the through holes on the support vertical plate and screw the screws into the corresponding alignment slots of the positioning frame and the irregular sheet metal cover. The simultaneous locking of multiple holes by several electric screwdrivers can improve the locking efficiency and ensure that the force on each connection point is consistent, realize automated hole locking, reduce manual assembly errors, and improve the connection efficiency and fixing accuracy of the irregular sheet metal cover and the positioning frame. Attached Figure Description

[0016] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings.

[0017] Figure 1 This is a schematic diagram of the external structure of the present invention; Figure 2 This is a three-dimensional structural diagram of the positioning frame of the present invention; Figure 3 This is a schematic diagram of the streamlined component of the present invention; Figure 4 For the present invention Figure 1 A magnified view of a section at point A in the middle; Figure 5 This is a schematic diagram of the installation structure of the adsorption clamp and the flipping plate of the present invention; Figure 6 This is a three-dimensional structural diagram of the flip plate and the moving plate of the present invention.

[0018] In the diagram: 1. Base plate; 2. Support top plate; 3. Positioning frame; 4. Support vertical plate; 5. Mounting plate; 6. Streamlined component; 7. Serrated section; 9. Linear slide rail one; 10. Electric push rod one; 11. Limiting rod; 12. Through hole; 13. Linear cylinder; 14. Adjusting seat one; 15. Mounting cylinder; 16. Electric screwdriver; 17. Adsorption clamp; 18. Suction cup; 19. Electric push rod two; 20. Adjusting seat two; 21. Screw; 22. Motion plate; 23. Flip plate; 24. Folding plate; 25. Linear slide rail two; 26. Air-cooled welding gun. Detailed Implementation

[0019] To further illustrate the technical means and effects of the present invention in achieving its intended purpose, the following detailed description of the specific implementation methods, structures, features, and effects of the present invention, in conjunction with the accompanying drawings and preferred embodiments, is provided.

[0020] Please see Figures 1-6 As shown, the present invention provides a disassembly welding process for the irregular sheet metal outer casing of an electricity meter testing device, which includes the following steps: Step 1: Install the irregular sheet metal cover on the sliding clamping unit at the bottom of the support top plate 2, and align it with the positioning frame 3 installed on the welding frame by sliding. Step 2: After alignment, the automatic screw-tightening unit fixes the irregular sheet metal cover to the positioning frame 3; Step 3: Next, the external robotic arm aligns the streamlined part 6 into the groove on the edge of the irregular sheet metal cover and bends it into shape. Step 4: The automatic welding unit welds the joint between the streamlined component 6 and the irregular sheet metal cover, then welds the gaps in the streamlined component 6, and after forming, scrapes off the putty and polishes the welded areas of the streamlined component 6.

[0021] First, in step one, the prefabricated irregular sheet metal cover is installed on the sliding clamping unit at the bottom of the supporting top plate 2. Through its sliding and lifting adjustment function, the irregular sheet metal cover can move along a predetermined trajectory to the positioning frame 3 on the welding frame. The positioning frame 3 serves as a reference positioning component in the entire welding assembly process, used to define the installation position, posture, and hole reference of the irregular sheet metal cover, thereby providing a unified reference basis for subsequent assembly and welding.

[0022] Secondly, after the irregular sheet metal cover and the positioning frame 3 are aligned, the automatic screw-tightening unit tightens the screws to fix the irregular sheet metal cover and the positioning frame 3. Threaded holes are pre-set at the corresponding frame positions of the irregular sheet metal cover. The positioning frame 3 is detachably fixed to the irregular sheet metal cover. This fixing method can reliably lock the overall position of the cover before welding, avoiding the displacement of the mounting hole positions, edge contours and spatial posture caused by heat input, stress release or external force interference during subsequent splicing, welding, and partial bending forming processes. This effectively ensures the accuracy of key mounting hole positions and overall assembly of the product.

[0023] Next, an external robotic arm moves the streamlined component 6 into a pre-made slot on the edge of the irregular sheet metal cover and bends the streamlined component 6. The streamlined component 6 adopts a split and optimized sheet metal structure, that is, several sawtooth transition structures are formed on the streamlined component 6, so that the streamlined component 6 can more easily conform to the target curvature under the action of external force, thereby forming the required streamlined transition shape.

[0024] Finally, the automated welding unit welds and fixes the joint between the streamlined component 6 and the irregular sheet metal cover, forming an integral connection structure. After the main welding is completed, the gaps on the streamlined component 6 caused by splitting, seaming, and segmented forming are repaired by welding to restore the continuity of the overall curved surface and the integrity of the structure. After the repair welding is completed, the repaired area is scraped, ground, and smoothed to achieve a smooth, rounded, and continuous appearance on the outer surface of the streamlined transition area, meeting the comprehensive requirements of the meter testing equipment cover in terms of structural use and product appearance. Through automated welding and repair welding, the integral forming of the split streamlined curved surface is achieved, enabling the rapid manufacturing of complex irregular covers without the need for dedicated large stamping dies. This reduces the development cost and time cost of dedicated dies. By replacing the integral die forming with split welding forming, the streamlined curved surface, which was originally difficult to form in one go, is split into easily bendable streamlined components 6, significantly reducing the manufacturing difficulty of complex curved surface covers and improving the feasibility of the process.

[0025] See Figure 1 and Figure 4 As shown, the welding frame includes a base plate 1, a support vertical plate 4 is fixed to the edge of the upper surface of the base plate 1, and a support top plate 2 is fixed to the top surface of the support vertical plate 4. The positioning frame 3 has several mounting cylinders 15 on one side surface that are fixedly connected to one surface of the supporting vertical plate 4.

[0026] The irregularly shaped sheet metal cover is clamped and moved by a sliding clamping unit installed at the bottom of the supporting top plate 2. The sliding clamping unit drives the irregularly shaped sheet metal cover to slide towards the positioning frame 3. After the irregularly shaped sheet metal cover moves to the predetermined position, the positioning frame 3 plays a role in limiting, supporting, and positioning the irregularly shaped sheet metal cover, enabling it to be aligned according to the preset posture. Since the positioning frame 3 is fixed to the supporting vertical plate 4 by several mounting cylinders 15, its installation position is stable and it is not easy to shift during subsequent welding processes. Therefore, it can continuously provide an accurate positioning reference for the irregularly shaped sheet metal cover.

[0027] See Figure 5 As shown, the sliding clamping unit includes a linear slide rail 9 on the bottom surface of the supporting top plate 2. A top plate is mounted on the slider of the linear slide rail 9 and slides along the bottom surface of the supporting top plate 2. An electric push rod 10 is mounted on the lower surface of the top plate. An adjustment seat 14 is fixed to the pushing end of the electric push rod 10. Two adsorption clamping plates 17 are slidably mounted on the bottom of the adjustment seat 14, which approach synchronously and adsorb and clamp the surface of the irregular sheet metal cover. Each adsorption clamp 17 has multiple suction cups 18 on its surface, and the multiple suction cups 18 are connected to the negative pressure pump through the same negative pressure pipeline.

[0028] First, the top plate moves to the corresponding position above the irregular sheet metal cover under the guidance of the linear slide rail 9. Then, the electric push rod 10 moves, driving the adjusting seat 14 and the two suction clamps 17 downwards towards the target position. After that, the two suction clamps 17 move inwards simultaneously and fit against the surface of the irregular sheet metal cover. At the same time, the negative pressure pump is activated, and multiple suction cups 18 are used to suction and clamp the irregular sheet metal cover. The suction cups 18 on both sides perform multi-point negative pressure suction on the surface of the irregular sheet metal cover, reducing the pressure damage and local deformation of the sheet metal surface during clamping and improving clamping stability. At the same time, the two suction clamps 17 move closer to clamp, improving the clamping centering and force uniformity, which is beneficial to the positional accuracy control of the irregular sheet metal cover in the subsequent alignment and welding process. After clamping is completed, the sliding clamping unit can drive the irregular sheet metal cover to move as a whole, so that it is accurately aligned with the positioning frame 3, providing a stable clamping foundation for subsequent automatic screw tightening, assembly of streamlined parts 6, and welding and repair processes.

[0029] See Figure 1 and Figure 4 As shown, the automatic wire-tightening unit includes a mounting plate 5 disposed on another surface of the support vertical plate 4, and a limiting rod 11 that slides in cooperation with the mounting plate 5 is fixed on the side surface of the support vertical plate 4 away from the positioning frame 3. A linear cylinder 13 for pushing the mounting plate 5 to move is installed on the side surface of the supporting vertical plate 4 facing the positioning frame 3; The surface of the mounting plate 5 is equipped with several electric screwdrivers 16 that embed screws into the positioning bracket 3 and the alignment slots of the irregular sheet metal cover. The surface of the supporting vertical plate 4 is provided with through holes 12 for the corresponding screwdriver bits of the electric screwdrivers 16 to pass through.

[0030] After the irregular sheet metal cover moves to the positioning frame 3 and completes the alignment under the action of the sliding clamping unit, the linear cylinder 13 is activated, pushing the mounting plate 5 forward along the guide direction of the limiting rod 11, so that several electric screwdrivers 16 on the mounting plate 5 simultaneously approach the supporting vertical plate 4. Then, the screwdriver bits of each electric screwdriver 16 pass through the through holes 12 on the supporting vertical plate 4 and screw the screws into the corresponding alignment holes of the positioning frame 3 and the irregular sheet metal cover. The simultaneous locking of multiple holes by several electric screwdrivers 16 can improve the locking efficiency and ensure that the force of each connection point is consistent, realize automated hole locking, reduce manual assembly errors, and improve the connection efficiency and fixing accuracy of the irregular sheet metal cover and the positioning frame 3. After the screws are tightened, the linear cylinder 13 reverses its action, driving the mounting plate 5 and the electric screwdrivers 16 to return to the initial position as a whole.

[0031] See Figure 1 As shown, the positioning frame 3 has three reinforcing ribs fixed on one side of the support vertical plate 4, and the surface of the positioning frame 3 is provided with four sets of weight-reducing parts. Each reinforcing rib is located at the vertical center axis of two adjacent sets of weight-reducing parts, and each set of weight-reducing parts includes several weight-reducing holes.

[0032] Once the irregular sheet metal cover is aligned with the positioning frame 3 and fixed by the automatic screw-tightening unit, the reinforcing ribs enhance the bending strength, torsional strength, and overall rigidity of the positioning frame 3, ensuring that it is not easily deformed during the positioning, locking, and welding of the irregular sheet metal cover, thus improving the stability of the positioning reference. The weight reduction section reduces the weight of the positioning frame 3 while meeting the rigidity requirements, facilitating the load control of the overall frame and the lightweight design of the device, thereby ensuring the reliability and accuracy of the entire welding positioning process.

[0033] See Figure 3 As shown, the surface of the streamlined part 6 is provided with several serrated sections 7 for bending and forming.

[0034] In the prior art, the streamlined part 6 is a relatively regular plate-shaped part in its unformed state. When it needs to be installed on the edge of the irregular sheet metal cover and form a streamlined curved transition structure, directly bending the complete plate as a whole can easily cause problems such as large bending resistance, obvious springback, local wrinkling or uneven curvature due to the excessive continuity of the material.

[0035] The robotic arm moves the streamlined component 6, equipped with serrated sections 7, to the slotted position on the edge of the irregularly shaped sheet metal cover, and then applies a bending force to the streamlined component 6. At this time, the areas where several serrated sections 7 are located deform first, allowing the streamlined component 6 to gradually bend along a preset direction and conform to the streamlined transition position of the irregularly shaped sheet metal cover. The serrated sections 7 divide and release the local bending area of ​​the streamlined component 6, making it easier for the sheet metal to deform during bending, thereby reducing the overall bending resistance and facilitating the formation of complex streamlined surfaces. After the overall outline of the streamlined component 6 reaches the predetermined shape, the automatic welding unit welds the joint between the streamlined component 6 and the irregularly shaped sheet metal cover, and repairs the gaps or intervals formed between the serrated sections 7, thereby restoring the structural continuity and overall strength of the streamlined component 6 after forming.

[0036] See Figure 5 and Figure 6 As shown, the automatic welding unit includes an electric push rod 19. The pushing end of the electric push rod 19 is fixed with an adjustment seat 20. The adjustment seat 20 is equipped with a screw 21 driven by a forward and reverse motor. The screw 21 has two threaded parts in different directions. Each threaded part is threaded with a welding part that slides along the bottom surface of the adjustment seat 20. The welded component includes a moving plate 22. The bottom of the moving plate 22 is connected to a flipping plate 23 via a rotary cylinder. The rotation center of the flipping plate 23 coincides with the center of the arc surface of the irregular sheet metal cover. The end of the flipping plate 23 is fixed with a folding plate 24 that is inclined toward the arc edge of the irregular sheet metal cover. A linear slide rail 25 is fixed on the inner side of the folding plate 24. A wind-cooled welding gun 26 for repairing welding at the weld joint and gap is installed on the sliding block of the linear slide rail 25.

[0037] The electric push rod 19 first pushes the adjusting seat 20 closer to the irregular sheet metal cover, allowing the automatic welding unit to enter the welding area. Then, the forward and reverse motors drive the screw 21 to rotate, causing the two welding parts to adjust their spacing synchronously along the bottom surface of the adjusting seat 20, so that they are close to the target welding positions of the corresponding irregular sheet metal cover. Next, the rotary cylinder drives the flipping plate 23 to rotate around the center that is consistent with the center of the arc surface of the irregular sheet metal cover, so that the orientation of the folding plate 24 and the air-cooled welding gun 26 matches the arc edge of the irregular sheet metal cover. The welding and repair welding always revolve around the center of the arc surface of the irregular sheet metal cover, ensuring the accuracy of the welding trajectory and the arc edge. After that, the air-cooled welding gun 26 moves in a straight line under the guidance of the linear slide rail 25, so as to get closer to the welding point and gap in the inclined direction defined by the folding plate 24, and perform fine welding at different positions. First, the joint between the streamlined part 6 and the irregular sheet metal cover is welded and fixed, and then the gap formed by the serrated part 7 is repaired. After welding is completed, each component is reset in sequence, providing working conditions for subsequent processes such as scraping and grinding. This takes into account both splicing and repair welding needs, improving the weld formation quality, welding accuracy and work efficiency during the disassembly and welding process of irregular curved surface covers.

[0038] In use, this invention, by setting up streamlined component 6 and an automatic welding unit, forms several sawtooth transition structures on streamlined component 6, making it easier for streamlined component 6 to conform to the target curvature under external force, thereby forming the required streamlined transition shape. The automatic welding unit welds the joint between streamlined component 6 and irregular sheet metal cover, and repairs the gaps or intervals formed between sawtooth parts 7, thereby restoring the structural continuity and overall strength of streamlined component 6 after forming, realizing the overall forming of split streamlined curved surface, completing the rapid manufacturing of complex irregular cover without the need for special large stamping molds, reducing the development cost and time cost of special molds, and replacing the overall mold forming with split welding forming, splitting the originally difficult-to-form streamlined curved surface into easily bendable streamlined component 6; By setting a positioning frame 3 that can be detachably connected to the irregular sheet metal cover, the overall position of the cover is reliably locked before welding, avoiding the displacement of the mounting hole position, edge contour and spatial posture caused by heat input, stress release or external force interference during subsequent splicing, welding and local bending forming processes, thereby effectively ensuring the key mounting hole position and overall assembly accuracy of the product. By setting up an automatic screw-tightening unit, the linear cylinder 13 pushes the mounting plate 5 forward along the guide direction of the limiting rod 11, so that several electric screwdrivers 16 on the mounting plate 5 simultaneously approach the supporting vertical plate 4. Then, the screwdriver bits of each electric screwdriver 16 pass through the through holes 12 on the supporting vertical plate 4 and screw the screws into the corresponding alignment holes of the positioning frame 3 and the irregular sheet metal cover. The simultaneous locking of multiple holes by several electric screwdrivers 16 can improve the locking efficiency and ensure that the force on each connection point is consistent, realize automated hole locking, reduce manual assembly errors, and improve the connection efficiency and fixing accuracy of the irregular sheet metal cover and the positioning frame 3.

[0039] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A disassembled welding process for the irregularly shaped sheet metal outer casing of an electricity meter testing equipment, characterized by: The welding process includes the following steps: Step 1: Install the irregular sheet metal cover on the sliding clamping unit at the bottom of the supporting top plate (2), and align it with the positioning frame (3) installed on the welding frame by sliding. Step 2: After alignment, the automatic screw-tightening unit fixes the irregular sheet metal cover to the positioning frame (3); Step 3: Next, the external robotic arm will align the streamlined part (6) into the groove on the edge of the irregular sheet metal cover and bend it into shape. Step 4: The automatic welding unit welds the joint between the streamlined part (6) and the irregular sheet metal cover, then welds the gaps in the streamlined part (6), and after forming, scrapes off the ash and grinds the welded parts of the streamlined part (6).

2. The disassembled welding process for the irregular sheet metal outer casing of the meter testing equipment according to claim 1, characterized in that, The welding frame includes a base plate (1), a support vertical plate (4) is fixed to the edge of the upper surface of the base plate (1), and a support top plate (2) is fixed to the top surface of the support vertical plate (4). The positioning frame (3) has several mounting cylinders (15) on one side surface that are fixedly connected to one surface of the supporting vertical plate (4).

3. The disassembled welding process for the irregular sheet metal outer casing of the meter testing equipment according to claim 1, characterized in that, The sliding clamping unit includes a linear slide rail (9) on the bottom surface of the supporting top plate (2). A top plate (1) is mounted on the slider of the linear slide rail (9) and is limited to sliding along the bottom surface of the supporting top plate (2). An electric push rod (10) is mounted on the lower surface of the top plate. An adjustment seat (14) is fixed to the pushing end of the electric push rod (10). Two adsorption clamps (17) are slidably mounted on the bottom of the adjustment seat (14) and are synchronously close to adsorb and clamp the surface of the irregular sheet metal cover.

4. The disassembled welding process for the irregular sheet metal outer casing of the meter testing equipment according to claim 3, characterized in that, Each adsorption clamp (17) has multiple suction cups (18) on its surface, and the multiple suction cups (18) are connected to the negative pressure pump through the same negative pressure pipeline.

5. The disassembled welding process for the irregular sheet metal outer casing of the meter testing equipment according to claim 2, characterized in that, The automatic wire-tightening unit includes a mounting plate (5) on another surface of the support vertical plate (4), and a limiting rod (11) that slides with the mounting plate (5) is fixed on the side surface of the support vertical plate (4) away from the positioning frame (3). A linear cylinder (13) for pushing the mounting plate (5) is installed on the side surface of the support vertical plate (4) facing the positioning frame (3). The surface of the mounting plate (5) is equipped with a number of electric screwdrivers (16) that embed screws into the positioning bracket (3) and the alignment slots of the irregular sheet metal cover. The surface of the support vertical plate (4) is provided with through holes (12) for the bits of the corresponding electric screwdrivers (16) to pass through.

6. The disassembled welding process for the irregular sheet metal outer casing of the meter testing equipment according to claim 1, characterized in that, The positioning frame (3) has three reinforcing ribs fixed on one side of the support vertical plate (4), and the surface of the positioning frame (3) is provided with four sets of weight-reducing parts. Each reinforcing rib is located on the vertical central axis of two adjacent sets of weight-reducing parts, and each set of weight-reducing parts includes several weight-reducing holes.

7. The disassembled welding process for the irregular sheet metal outer casing of the meter testing equipment according to claim 1, characterized in that, The surface of the streamlined component (6) is provided with a number of serrated sections (7) for bending and forming.

8. The disassembled welding process for the irregular sheet metal outer casing of the electricity meter testing equipment according to claim 1, characterized in that, The automatic welding unit includes an electric push rod two (19), and an adjustment seat two (20) is fixed to the pushing end of the electric push rod two (19). The adjustment seat two (20) is equipped with a screw (21) driven by a forward and reverse motor. The screw (21) has two threaded parts in different directions, and each threaded part is threaded with a welding part that slides along the bottom surface of the adjustment seat two (20).

9. The disassembled welding process for the irregular sheet metal outer casing of the meter testing equipment according to claim 8, characterized in that, The welded component includes a moving plate (22), the bottom of which is connected to a rotating plate (23) via a rotary cylinder. The rotation center of the rotating plate (23) is consistent with the center of the arc surface of the irregular sheet metal cover. The end of the rotating plate (23) is fixed with a folding plate (24) that is inclined toward the arc edge of the irregular sheet metal cover. The inner side of the folding plate (24) is fixed with a linear slide rail (25). The sliding block of the linear slide rail (25) is equipped with a wind-cooled welding gun (26) for repairing welds at the weld joints and gaps.

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