A welding device for welding concave-convex thin plates to an outer frame of a hydrogen production device.

Abstract

This invention relates to the field of assembly technology, specifically to a welding device for welding concave-convex thin plates to an outer frame of a hydrogen production equipment. It facilitates the adjustment of large-diameter concave-convex thin plates and the outer frame, improving accuracy and making it suitable for mass production. The device includes a base with a positioning pad in the center. The upper surface of the positioning pad has a positioning groove that mates with the lower boss of the concave-convex plate. Above the positioning pad are a flat pressure plate for pressing down the upper boss of the concave-convex plate and a pressure edge ring for pressing down the outer ring of the concave-convex plate. The outer circumferential surface of the pressure edge ring has uniformly distributed welding clearance notches. The upper surface of the base has clamping blocks and radial clearance adjusting screws evenly distributed along the circumferential direction to mate with the outer frame.

Description

Technical Field

[0001] This invention relates to the field of assembly technology, specifically to a welding device for welding concave-convex thin plates to an outer frame of a hydrogen production equipment. Background Technology

[0002] In water electrolysis hydrogen production equipment, the main components are assembled from electrode plates and electrode frames, which are then welded together. The electrode plates are made of thin plates through stamping, forming a concave-convex plate with arc-shaped bosses. These concave-convex plates need to be welded integrally with the outer frame electrode frame. After welding, the relative positional dimensional accuracy between the concave-convex plates and the outer frame is critical. Furthermore, a relatively uniform welding gap must be maintained between the concave-convex plates and the outer frame during welding. In actual production, because the concave-convex plates are made by stamping regularly arranged arc-shaped bosses from both sides of a large-diameter circular plate, the material deformation during stamping generates internal stress. Simultaneously, the relatively thin material and large diameter cause irregular warping deformation in the formed concave-convex plates. Therefore, during welding, it is crucial to first correct the warping deformation of the concave-convex plates, especially controlling the deformation at the outer circumferential weld and the positional accuracy relative to the outer frame. Simultaneously, the welding gap between the concave-convex plates and the outer frame must be adjusted. Currently, there is no suitable device for this adjustment; most adjustments rely on manual operation using measuring tools, resulting in low efficiency and poor adjustment accuracy. Summary of the Invention

[0003] To address the issues of low adjustment efficiency and poor precision in existing large-diameter embossed thin plates and outer frame, this invention provides a welding device for welding embossed thin plates and outer frame to a hydrogen production equipment. This device facilitates the adjustment of large-diameter embossed thin plates and outer frame, improving precision and making it suitable for mass production.

[0004] The technical solution is as follows: a welding device for welding a convex-concave thin plate to an outer frame of a hydrogen production equipment, characterized in that it includes a base, a positioning pad is provided in the middle of the base, the upper surface of the positioning pad is provided with a positioning groove that mates with the lower boss of the convex-concave plate, a flat pressure plate for pressing the upper boss of the convex-concave plate and a pressing edge ring for pressing the outer ring of the convex-concave plate are provided above the positioning pad, the outer circumferential surface of the pressing edge ring is uniformly provided with welding clearance notches, the upper surface of the base is evenly distributed with pressing blocks and radial clearance adjusting screws that mate with the outer frame along the circumferential direction; a limiting groove for placing the positioning pad is provided in the middle of the base, and a vertical position adjusting screw is provided at the bottom of the limiting groove; an electromagnet is provided on the flat pressure plate; guide posts are evenly distributed on the flat pressure plate along the circumferential direction, a guide sleeve that mates with the guide posts is provided on the pressing edge ring, and a limiting pressing device is provided inside the guide sleeve.

[0005] A further feature is that the limiting clamping device is a limiting screw with a limiting plate, the lower threaded section of the limiting screw is connected to the threaded countersunk hole on the guide post, and the limiting plate presses against the stepped surface inside the guide sleeve;

[0006] Both the flat pressure plate and the pressure ring are provided with lifting lugs;

[0007] The clamping block has a waist-shaped hole and is fixed by a clamping bolt passing through the waist-shaped hole. One end of the clamping block presses against the upper surface of the outer frame and the other end presses against the pad placed on the base.

[0008] The upper surface of the base is uniformly provided with mounting grooves along the circumferential direction. A screw seat is fixed in the mounting groove. The radial clearance adjusting screw passes through the screw seat laterally and abuts against the outer side of the outer frame.

[0009] With this invention, the positioning pad is placed on the base, and the relative positional accuracy is determined by the combination of the working plane of the base and the positioning pad. The combination of the flat pressure plate and the pressure ring plays a role in graded leveling. In the working state, after the flat pressure plate and the pressure ring are used to level the concave and convex plates, the concave and convex plates and the outer frame are spot welded and fixed at the welding clearance notch on the circumference of the pressure ring. After the welding points are fixed at multiple notch positions, the pressure ring is removed to make room for welding. Subsequently, the whole circumference welding is completed with the help of a special rotating platform and welding robot arm. The device has a simple structure, high reliability and precision, and convenient adjustment in all directions, making it suitable for mass production. Attached Figure Description

[0010] Figure 1 This is a three-dimensional schematic diagram of the present invention;

[0011] Figure 2 This is a top view of the structure of the present invention;

[0012] Figure 3 for Figure 2 Sectional view along the AA direction;

[0013] Figure 4 for Figure 3 Enlarged diagram of point B in the middle. Detailed Implementation

[0014] See Figures 1 to 4As shown, a welding device for welding a convex-concave sheet to an outer frame of a hydrogen production equipment includes a base 1. A limiting groove for placing a positioning pad 2 is provided in the middle of the base 1. Three to four adjusting screws 3 are provided at the bottom of the limiting groove to adjust the vertical position of the positioning pad 2, ensuring placement accuracy. The positioning pad 2 is positioned in the middle of the base 1. A positioning groove is provided on the upper surface of the positioning pad 2 to mate with the lower boss of the convex-concave sheet 4. The depth of the positioning groove is the same as the thickness of the lower boss, and its diameter is slightly larger than the lower boss, allowing for horizontal position adjustment. The outer ring of the convex-concave sheet 4 rests precisely on the outer edge of the opening of the positioning groove in the positioning pad 2. A flat pressure plate 6 is provided above the positioning pad 2 to press down the upper boss of the convex-concave sheet 4. The pressing ring 7 is used to press down the outer ring of the concave-convex plate 4. The outer circumferential surface of the pressing ring 7 is evenly provided with welding clearance notches 8, which can facilitate spot welding at multiple positions to initially fix the concave-convex plate 4 and the outer frame 9. An electromagnet 10 is provided on the flat pressing plate 6. First, the flat pressing plate 6 is brought into contact with the upper boss of the concave-convex plate 4. The self-weight of the flat pressing plate 6 is used to flatten the concave-convex plate 4. At the same time, the gap between the outer circumference and the outer frame 9 is checked and adjusted appropriately. Then, the electromagnet 10 on the flat pressing plate 6 is used to generate attraction to make the concave-convex plate 4 fit more closely to the flat pressing plate 6 and the positioning pad 2. Then, the pressing ring 7 is lowered to flatten the outer ring of the concave-convex plate 4. At this time, the gap between the concave-convex plate 4 and the outer frame 9 can be further checked to see if it is uniform. If the difference is too large, the pressing ring 7 can be slowly lifted and the relative position of the two workpieces can be adjusted. After the pressure ring 7 is flattened into place, check the accuracy of the assembly position lines between the convex and concave plates 4 and the outer frame 9. If necessary, fine-tune using the up-and-down position adjustment screws 3. Guide posts 11 are evenly distributed along the circumference of the flat pressure plate 6. The pressure ring 7 has guide sleeves 12 that mate with the guide posts 11. A limiting clamping device is installed inside the guide sleeve 12, specifically a limiting screw 14 with a limiting plate 13. The lower threaded section of the limiting screw 14 connects to the threaded countersunk hole on the guide post 11. The limiting plate 13 presses against the stepped surface inside the guide sleeve 12, thus making the pressure ring 7 and the flat pressure plate 6 form a single unit, achieving the flattening operation of the entire convex and concave plate 4. Both the flat pressure plate 6 and the pressure ring 7 are equipped with lifting lugs 15 for easy hoisting.

[0015] The upper surface of the base 1 is evenly distributed with clamping blocks 16 and radial clearance adjusting screws 17 that mate with the outer frame along the circumferential direction. The clamping blocks 16 have oblong holes and are fixed by clamping bolts 18 passing through the oblong holes. One end of the clamping block 16 presses against the upper surface of the outer frame 9, and the other end presses against a gasket 19 placed on the base 1. The upper surface of the base 1 is evenly distributed with mounting grooves 20 along the circumferential direction. A screw seat 5 is fixed within the mounting groove 20, and the radial clearance adjusting screw 17 passes laterally through the screw seat 5 and abuts against the outer side of the outer frame 9. After the clamping ring 7 is installed in place, if necessary, the radial clearance adjusting screw 17 can be used to further fine-tune the welding gap between the two workpieces. Then, the clamping blocks 16 are used to clamp and fix the outer frame 9. At this point, the assembly, adjustment, and fixing of the two workpieces are completed.

[0016] After the outer frame 9 and the concave-convex plate 4 are assembled and fixed in place, spot welding is used to fix the two workpieces together. Then, the limiting screw 14 is removed and the pressure ring 7 is lifted away, while the flat pressure plate 6 remains in place, thus making room for welding. Subsequently, automatic welding by a robotic arm or manual welding in conjunction with a special rotating platform is used to complete the welding of the entire weld seam around the circumference of the workpiece.

Claims

1. A welding device for welding a convex-concave thin plate to an outer frame of a hydrogen production equipment, characterized in that, It includes a base, on which a positioning pad is disposed in the middle. The upper surface of the positioning pad has a positioning groove that mates with the lower boss of the concave-convex plate. Above the positioning pad are a flat pressure plate for pressing the upper boss of the concave-convex plate and a pressing edge ring for pressing the outer ring of the concave-convex plate. The outer circumferential surface of the pressing edge ring has welding clearance notches evenly distributed. The upper surface of the base has pressing blocks and radial clearance adjusting screws that mate with the outer frame evenly distributed along the circumferential direction. A limiting groove for placing the positioning pad is disposed in the middle of the base. A vertical position adjusting screw is disposed at the bottom of the limiting groove. An electromagnet is disposed on the flat pressure plate. Guide posts are evenly distributed along the circumferential direction on the flat pressure plate. A guide sleeve that mates with the guide posts is disposed on the pressing edge ring. A limiting pressing device is disposed inside the guide sleeve.

2. The welding device for welding a concave-convex thin plate to an outer frame of a hydrogen production equipment according to claim 1, characterized in that, The limiting and clamping device is a limiting screw with a limiting plate. The lower threaded section of the limiting screw is connected to the threaded countersunk hole on the guide post, and the limiting plate presses against the stepped surface inside the guide sleeve.

3. The welding device for welding a concave-convex thin plate to an outer frame of a hydrogen production equipment according to claim 1, characterized in that, Both the flat pressure plate and the pressure ring are provided with lifting lugs.

4. The welding device for welding a concave-convex thin plate to an outer frame of a hydrogen production equipment according to claim 1, characterized in that, The clamping block has a waist-shaped hole and is fixed by a clamping bolt passing through the waist-shaped hole. One end of the clamping block presses against the upper surface of the outer frame, and the other end presses against the pad placed on the base.

5. The welding device for welding a concave-convex thin plate to an outer frame of a hydrogen production equipment according to claim 1, characterized in that, The upper surface of the base is uniformly provided with mounting grooves along the circumferential direction. A screw seat is fixed in the mounting groove. The radial clearance adjusting screw passes through the screw seat laterally and abuts against the outer side of the outer frame.

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