Water storage box welding jig

Abstract

The utility model discloses a water storage box welding jig, which relates to the technical field of welding and comprises a bottom plate, an angular position male die and a side frame male die are arranged on the bottom plate, and a station is defined between the angular position male die and the side frame male die; the four pressing devices are located on the edges of the left side and the right side of the bottom plate and the left side and the right side of the rear side of the bottom plate respectively, and each pressing device comprises a lower pressing head; the two pressing and attaching plates are arranged between the lower pressing head and the corresponding bent corner positions respectively, and a welding opening is formed in each pressing and attaching plate; after the water storage box is placed at a station and positioned, the front side and the rear side of the pressing and attaching plate are pressed through the lower pressing head of the pressing device, then the bent corner position is pressed, a welding gun can penetrate through the welding opening to weld a corner position welding seam, it is guaranteed that the welding effect is better, the welding process is simple, operation is convenient, the device can adapt to the narrow bent edge on the water storage box, and the welding efficiency is improved. And the welding work efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of welding technology, and in particular to a welding fixture for a water storage box. Background Technology

[0002] Coffee machines typically use brewing components to extract coffee. The cup is then placed on a water reservoir, and the brewed coffee flows into the cup. Water generated during the coffee-making process is collected by the water reservoir and can then be drained away or removed and emptied. To facilitate installation in coffee machines, this water reservoir usually requires rear and side bends along its outer edge. These bends are typically made by bending steel plates, and the gaps between the rear and side bends need to be welded together to ensure sufficient structural strength for installation. Currently, there is a lack of suitable fixtures for welding these bends, affecting welding efficiency. Utility Model Content

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a welding fixture for a water storage box.

[0004] According to an embodiment of the present invention, a water storage box welding fixture includes: a base plate, on which corner punches and side frame punches are provided. The corner punches are arranged on the left and right sides of the rear side of the base plate, and the side frame punches are arranged on the left and right sides of the front side of the base plate. A workstation is defined between the corner punches and the side frame punches. The box workpiece to be welded is placed on the workstation. The rear side of the box workpiece has a rear bend edge, and the left and right sides of the box workpiece have side bend edges. The junction of the rear bend edge and the side bend edges is a bend edge corner. The corner punch abuts against the bend edge corner. On the lower side of the bent corner, the side frame punch presses against the lower side of the side bend; four clamping devices are respectively located on the left and right edges of the base plate and on the left and right sides of the rear side of the base plate, each clamping device including a lower pressure head, the lower pressure head being located above the box workpiece; two pressing plates are respectively disposed between the lower pressure head and the corresponding bent corner, the lower pressure head being able to press down on the front and rear sides of the pressing plate respectively, each pressing plate having a welding opening, the welding opening corresponding to the bend weld on the bent corner.

[0005] According to some embodiments of the present invention, the corner punch sidewall has a corner punch limiting surface, the corner punch limiting surface abuts against the corner of the box workpiece, and the side frame punch sidewall has a side frame punch limiting surface, the side frame punch limiting surface abuts against the left and right outer sidewalls of the box workpiece.

[0006] According to some embodiments of the present invention, the pressing device includes a pressing device base, an elastic extension arm is provided on the pressing device base, and the pressing head is connected to the end of the elastic extension arm.

[0007] According to some embodiments of the present invention, the base of the pressing device is provided with a sliding joint, the edge of the base plate is provided with a sliding groove, the side of the sliding groove has a side opening, the sliding groove has an upper retaining edge, and the upper retaining edge retains the sliding joint.

[0008] According to some embodiments of the present invention, the sliding joint includes a circular column, and a sliding protrusion is provided on the lower side wall of the circular column, and the upper locking edge locks the upper side of the sliding protrusion.

[0009] According to some embodiments of the present invention, a return torsion spring is provided between the sliding joint and the sliding groove.

[0010] According to some embodiments of the present invention, a base bolt is provided on the base of the clamping device, and the base bolt passes through the base of the clamping device and abuts against the upper end face of the base plate.

[0011] According to some embodiments of this utility model, the pressing plate has a rhomboid plate structure, and the front and rear sides of the pressing plate are rhomboid corners, and the pressing head can press down on the rhomboid corners.

[0012] According to some embodiments of the present invention, a drain spout is provided on the lower side of the box workpiece, and a bottom hole is provided on the workstation, the bottom hole corresponding to the drain spout.

[0013] According to some embodiments of the present invention, a clamping device is provided on the front side of the base plate, and a clamping head is provided on the clamping device, which can press against the front side wall of the box workpiece.

[0014] The water storage box welding fixture according to the present utility model has at least the following technical effects: After the water storage box is placed in the work position, the lower pressure head of the pressing device presses the front and rear sides of the pressing plate and then presses the corner position of the bent edge. Then the welding gun can pass through the welding opening to weld the corner weld, ensuring better welding effect. The above welding process is simple and easy to operate. It can adapt to the relatively narrow bending edge of the water storage box and perform corner weld work on the corner of the bent edge, thereby improving the efficiency of welding work.

[0015] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0016] Additional aspects and advantages of this invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0017] Figure 1 This is a perspective view of the present invention;

[0018] Figure 2 This is an exploded view of the structure of this utility model;

[0019] Figure 3 This is a schematic diagram of the pressing device in this utility model;

[0020] Figure 4 This is a schematic diagram of the lower pressure head in this utility model;

[0021] Figure 5 This is a perspective view of the pressure plate in this utility model;

[0022] Figure 6 This is a perspective view of the clamping device in this utility model;

[0023] Figure 7 This is a schematic diagram of the clamping device in this utility model.

[0024] Figure label:

[0025] Base plate 100, corner punch 110, corner punch limiting surface 111, side frame punch 120, side frame punch limiting surface 121, station 130, bottom hole 131, sliding groove 140, side opening 141, upper retaining edge 142; clamping device 200, lower pressure head 210, lower pressure head connecting part 211, lower pressure guide post 212, movable pressure head 213, lower pressure guide sleeve 214, lower pressure spring 215, elastic extension arm 220, elastic part 221, clamping device base 230, sliding part 240, circular column 241, sliding joint 242 protrusion, 250 return torsion spring, 260 base bolt; 300 pressing plate, 310 welding opening, 320 rhomboid part; 400 clamping device, 410 clamping head, 411 adjustable clamp, 420 fixed cylinder, 430 swing arm, 431 operating end, 432 linkage end, 433 swing arm spindle, 440 connecting rod, 450 clamping device fixing frame; 500 box workpiece, 501 corner of box workpiece, 502 drain nozzle, 510 rear bend edge, 520 side bend edge, 530 bend edge corner, 531 bend edge weld. Detailed Implementation

[0026] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0027] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0028] In the description of this utility model, "multiple" means two or more, and "greater than," "less than," "exceeding," etc., are understood to exclude the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly specifying the number of indicated technical features or their sequential relationship.

[0029] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0030] The following is for reference. Figure 1 and Figure 2 Describes the welding fixture for the water storage box according to an embodiment of the present utility model.

[0031] like Figure 1 and Figure 2 As shown, the water storage box welding fixture according to an embodiment of the present utility model includes a base plate 100, four clamping devices 200 and two pressing plates 300.

[0032] A corner punch 110 and a side frame punch 120 are provided on the base plate 100. The corner punches 110 are located on the left and right sides of the rear side of the base plate 100, and the side frame punches 120 are located on the left and right sides of the front side of the base plate 100. A station 130 is defined between the corner punches 110 and the side frame punches 120. The box workpiece 500 to be welded is placed on the station 130. The box workpiece 500 has a rear bent edge 510 on its rear side and side bent edges 520 on its left and right sides. The junction of the rear bent edge 510 and the side bent edges 520 is a bent edge corner 530. The corner punch 110 abuts against the lower side of the bent edge corner 530. The side frame punch 120 abuts against the lower side of the side bending edge 520; four clamping devices 200 are respectively located on the left and right sides of the bottom plate 100 and the left and right sides of the rear side of the bottom plate 100. The clamping device 200 includes a lower pressure head 210, which is located above the box workpiece 500; two pressing plates 300 are respectively located between the lower pressure head 210 and the corresponding bending edge corner 530. The lower pressure head 210 can press down on the front and rear sides of the pressing plate 300 respectively. Each pressing plate 300 has a welding opening 310, which corresponds to the bending edge weld 531 on the bending edge corner 530.

[0033] For example, such as Figure 1 and Figure 2As shown, a corner punch 110 and a side frame punch 120 are provided on the base plate 100. The corner punch 110 is located on the left and right sides of the rear side of the base plate 100, and the side frame punch 120 is located on the left and right sides of the front side of the base plate 100. The corner punch 110 and the side frame punch 120 are fixed relative to each other on the base plate 100, and a station 130 is defined between the corner punch 110 and the side frame punch 120. The box workpiece 500 to be welded is placed on the station 130. The box workpiece 500 has a rear bent edge 510 on the rear side and side bent edges 520 on the left and right sides. The junction of the rear bent edge 510 and the side bent edge 520 is the corner of the bent edge 530, and the weld seam 531 of the bent edge serves as the connecting seam between the rear bent edge 510 and the side bent edge 520. The corner punch 110 abuts against the lower side of the corner bend 530, and the side frame punch 120 abuts against the lower side of the side bend 520, which is equivalent to supporting the rear bend 510 and the side bend 520 on the box workpiece 500 through the corner punch 110 and the side frame punch 120. Four clamping devices 200 are respectively located on the left and right edges of the base plate 100 and on the left and right sides of the rear side of the base plate 100. The clamping device 200 includes a lower pressure head 210, which is located above the box workpiece 500 and is used to fix the box workpiece 500 on the station 130. Two pressing plates 300 are respectively positioned between the lower pressing head 210 and the corresponding bending edge corner 530. The lower pressing head 210 can press down on the front and rear sides of the pressing plates 300 respectively. Each pressing plate 300 has a welding opening 310, which corresponds to the bending edge weld 531 on the bending edge corner 530. Essentially, the lower pressing head 210 presses down on the pressing plates 300 on the front and rear sides of the corresponding bending edge weld 531, thus stabilizing the position of the workpiece 500 corresponding to the bending edge weld 531. Then, the welding torch can pass through the welding opening 310 to weld the bending edge weld 531.

[0034] In actual operation, the box workpiece 500 to be welded is placed on station 130, with the corner punch 110 pressing against the lower side of the bent corner 530 and the side frame punch 120 pressing against the lower side of the side bent edge 520. This effectively lifts the rear bent edge 510 and the side bent edge 520 on the box workpiece 500 through the corner punch 110 and the side frame punch 120. Then, the pressing plate 300 is placed on the bent corner 530, and the welding opening 310 is aligned with the bent weld seam 531 on the bent corner 530.

[0035] Then, the pressure head 210 is controlled to press down on the pressing plate 300. The clamping devices 200 on the left and right edges of the base plate 100 are responsible for pressing down on the front side of the bent edge weld 531 on both sides of the box workpiece 500, and the left and right sides on the rear side of the base plate 100 are responsible for pressing down on the rear side of the bent edge weld 531 on both sides of the box workpiece 500, ensuring that the area around each bent edge weld 531 is fixed. The welding gun can then pass through the welding opening 310 to weld the bent edge weld 531.

[0036] The above welding process is simple and easy to operate, and can be used to specifically weld the bend weld 531 on the bend corner 530 of the water storage box. Since the front and rear sides of the bend weld 531 can be pressed tightly by the lower pressure head 210 and the pressing plate 300, it is especially suitable for the design of relatively narrow bends, which is in line with the structural characteristics of the water storage box.

[0037] After welding is completed, release the lower pressure head 210 and remove the pressure plate 300, then you can take away the welded box workpiece 500.

[0038] In some embodiments of this utility model, reference is made to Figure 2 The corner punch 110 has a corner punch limiting surface 111 on its side wall. The corner punch limiting surface 111 abuts against the corner 501 of the box workpiece 500. The side frame punch 120 has a side frame punch limiting surface 121 on its side wall. The side frame punch limiting surface 121 abuts against the left and right outer side walls of the box workpiece 500. That is, the corner punch 110 and the side frame punch 120 cooperate to hold the outer side wall of the box workpiece 500, ensuring that the box workpiece 500 is fixed securely and reliably at the work station.

[0039] In a further embodiment of this utility model, the corner punch limiting surface 111 is a right-angled surface, matching the shape of the corner 501 of the box workpiece 500. The side frame punch limiting surface 121 is a vertical surface, matching the shape of the outer side wall of the box workpiece 500.

[0040] In some embodiments of this utility model, reference is made to Figure 2 , Figure 3 The clamping device 200 includes a clamping device base 230, on which an elastic extension arm 220 is provided. A lower pressure head 210 is connected to the end of the elastic extension arm 220, and the elastic force of the elastic extension arm 220 can provide a downward pressing force to the lower pressure head 210.

[0041] In a further embodiment of the present invention, the elastic extension arm 220 has an elastic portion 221, and the elastic extension arm 220 provides a downward pressing force to the pressing head 210 through the elastic structural characteristics of the elastic portion 221.

[0042] In some embodiments of this utility model, the base of the clamping device 200 is provided with a sliding joint 240, and a sliding groove 140 is provided at the edge of the base plate 100. The sliding groove 140 has a side opening 141 on its side and an upper retaining edge 142 that engages the sliding joint 240. In this way, the clamping device 200 can be inserted into the sliding groove 140 through the side opening 141 via the sliding joint 240, and the upper retaining edge 142 engages the sliding joint 240, allowing the clamping device 200 to be mounted on the base plate 100. This design facilitates the disassembly and replacement of the clamping device 200.

[0043] In a further embodiment of this utility model, the sliding joint 240 includes a circular column 241, and a sliding protrusion 242 is provided on the lower side wall of the circular column 241. The upper retaining edge 142 locks the upper side of the sliding protrusion 242. The design of the circular column 241 allows the clamping device 200 to rotate. This allows the clamping device 200 or a portion thereof to be rotated first when placing the box workpiece 500, so that the lower pressing head 210 does not obstruct the placement of the box workpiece 500. After the box workpiece 500 and the pressing plate 300 are placed, the clamping device 200 is rotated to press the lower pressing head 210 against the pressing plate 300, which makes the operation more convenient.

[0044] In a further embodiment of the present invention, a reset torsion spring 250 is provided between the sliding joint 240 and the sliding groove 140, so that the clamping device 200 can be reset by the torque provided by the reset torsion spring 250 after rotation.

[0045] In a further embodiment of this utility model, a base bolt 260 is provided on the base 230 of the clamping device. The base bolt 260 passes through the base 230 of the clamping device and abuts against the upper end face of the base plate 100, ensuring that the clamping device 200 is fixed by the base bolt 260 after rotating to a suitable angle and no longer rotates. When it is necessary to rotate the clamping device 200, it is only necessary to rotate the base bolt 260 so that the base bolt 260 is no longer abutting against the base plate 100.

[0046] In some embodiments of this utility model, the clamping device base 230 can also be threadedly connected to the clamping device base 230 and the base plate 100 by means of a base bolt 260 passing through the clamping device base 230.

[0047] In some embodiments of this utility model, reference is made to Figure 4The lower pressure head 210 includes a lower pressure head connecting part 211 and a movable pressure head 213, wherein the lower pressure head connecting part 211 is connected to the elastic extension arm 220. The movable pressure head 213 can be adjusted up and down and is responsible for pressing the pressing plate 300. The lower pressure head connecting part 211 and the movable pressure head 213 are provided with a lower pressure spring 215. When pressing the pressing plate 300, the lower pressure spring 215 can play a buffering role, and the spring thrust of the lower pressure spring 215 can also provide a downward pressing force for the lower pressure head 210.

[0048] In some specific embodiments of this utility model, a downward pressure guide post 212 is provided on the lower side of the downward pressure head connecting part 211, and a downward pressure guide sleeve 214 is provided on the upper side of the movable pressure head 213. The downward pressure guide post 212 is inserted into the downward pressure guide sleeve 214. The downward pressure guide post 212 and the downward pressure guide sleeve 214 cooperate to guide the lifting and lowering adjustment process of the movable pressure head 213, ensuring that the movable pressure head 213 will not deviate in the vertical direction and will not be misaligned when pressing the pressing plate 300.

[0049] In some embodiments of this utility model, reference is made to Figure 2 , Figure 5 The pressing plate 300 has a diamond-shaped structure. The front and rear sides of the pressing plate 300 are diamond-shaped corners 320. The pressing head 210 can press down on the diamond-shaped corners 320. This ensures that even when the rear bending edge 510 and the side bending edge 520 are relatively narrow and the bending edge corner 530 has a relatively small area, the pressing head 210 can still press down on the pressing plate 300 and the bending edge corner 530 steadily.

[0050] In some embodiments of this utility model, reference is made to Figure 2 A drain spout 502 is provided on the lower side of the box workpiece 500, and a bottom hole 131 is provided on the station 130, corresponding to the drain spout 502. The drain spout 502 is used to drain water from the box workpiece 500 as needed after it is filled with water. The bottom hole 131, corresponding to the drain spout 502, ensures that the bottom plate 100 will not block the drain spout 502.

[0051] In some embodiments of this utility model, a clamping device 400 is provided on the front side of the base plate 100, and a clamping head 410 is provided on the clamping device 400. The clamping head 410 can hold the front side wall of the box workpiece 500. After the box workpiece 500 is placed in the station 130, the clamping device 400 and the clamping head 410 can hold the front side wall of the box workpiece 500, further ensuring that the box workpiece 500 is fixed firmly and reliably in the station 130.

[0052] In some embodiments of this utility model, reference is made to Figure 6 , Figure 7The clamping device 400 includes a fixed cylinder 420, and a clamping head 410 is inserted into the fixed cylinder 420. The clamping head 410 can move horizontally along the extension direction of the fixed cylinder 420. An adjustable clamp 411 is provided on the clamping head 410, and the adjustable clamp 411 is connected to the clamping head 410 by a thread. In this way, by adjusting the relative position between the adjustable clamp 411 and the clamping head 410, the clamping head 410 can be matched to water storage boxes of different lengths.

[0053] In some embodiments of this utility model, a swing arm 430 is provided on the fixed cylinder 420. The two ends of the swing arm 430 are an operating end 431 and a linkage end 432, respectively. A swing arm main shaft 433 is provided between the operating end 431 and the linkage end 432. The swing arm 430 is connected to the fixed cylinder 420 through the swing arm main shaft 433. A connecting rod 440 is connected between the linkage end 432 and the clamping head 410. The two ends of the connecting rod 440 are connected to the linkage end 432 and the clamping head 410 through rotating shafts, respectively. The swing arm 430 can rotate and swing along the swing arm main shaft 433. The linkage end 432 on the swing arm main shaft 433 drives the connecting rod 440, thereby pulling the clamping head 410 to extend and retract. In this way, the extension and retraction of the clamping head 410 can be controlled by operating the swing arm 430.

[0054] In some embodiments of this utility model, a return spring is provided between the fixed cylinder 420 and the clamping head 410. The return spring applies a pushing force to the clamping head 410 to ensure that the clamping head 410 can hold the workpiece.

[0055] In some embodiments of this utility model, the clamping device 400 is provided with a clamping device fixing frame 450, and the clamping device fixing frame 450 is provided with screw holes for screws to be installed. The clamping device 400 is connected to the crossbeam 110 through the clamping device fixing frame 450.

[0056] According to the embodiments of the present utility model, by adopting the above-mentioned water storage box welding fixture, the structure of the welding fixture is simplified, which facilitates the simplified design of the welding fixture and also improves the convenience of welding work.

[0057] Other configurations and operations of the welding fixture according to the embodiments of this utility model are known to those skilled in the art and will not be described in detail here.

[0058] The following is for reference. Figure 1 and Figure 2 The welding fixture for a water storage box according to an embodiment of the present invention is described in detail below with reference to a specific example. It is to be understood that the following description is merely illustrative and not intended to limit the scope of the invention.

[0059] like Figure 1 and Figure 2As shown, the water storage box welding fixture of this embodiment includes a base plate 100, four clamping devices 200, two pressing plates 300, and two clamping devices 400, which are responsible for welding the bent edge weld 531 of the box workpiece 500. The box workpiece 500 is provided with a box workpiece corner position 501, a water outlet 502, a rear bent edge 510, a side bent edge 520, and a bent edge corner position 530. The bent edge weld 531 is located on the bent edge corner position 530.

[0060] The base plate 100 is provided with a corner punch 110, a side frame punch 120, a work station 130, a bottom hole 131, and a sliding groove 140. The corner punch 110 is provided with a corner punch limiting surface 111. The side frame punch 120 is provided with a side frame punch limiting surface 121. The sliding groove 140 is provided with a side opening 141 and an upper retaining edge 142.

[0061] Four clamping devices 200 are distributed on the base plate 100. Each clamping device 200 includes a lower clamping head 210, an elastic extension arm 220, a clamping device base 230, a sliding joint 240, a return torsion spring 250, and a base bolt 260. The lower clamping head 210 includes a lower clamping head connecting part 211, a lower clamping guide post 212, a movable clamping head 213, a lower clamping guide sleeve 214, and a lower clamping spring 215. The elastic extension arm 220 has an elastic part 221. The sliding joint 240 is connected to the sliding joint groove 140 and includes a circular post 241 and a sliding protrusion 242.

[0062] Two pressing plates 300 are pressed by the lower pressing head 210 respectively. The pressing plate 300 includes a welding opening 310 and a diamond-shaped part 320.

[0063] Two clamping devices 400 are positioned on the left and right sides of the front of the base plate 100. Each clamping device 400 includes a clamping head 410, a fixed cylinder 420, a swing arm 430, a connecting rod 440, and a clamping device fixing frame 450. The clamping head 410 is equipped with an adjustable chuck 411. The swing arm 430 includes an operating end 431, a linkage end 432, and a swing arm spindle 433.

[0064] According to the water storage box welding fixture of this utility model embodiment, by setting it up in this way, at least the following effects can be achieved: after the box workpiece 500 to be welded is placed in the station 130 for positioning, the pressing head 210 of the pressing device 200 presses down on the front and rear sides of the pressing plate 300, thereby pressing the corner position 530 of the bent edge of the box workpiece 500. Then the welding gun can pass through the welding opening 310 to weld the corner weld 711, ensuring a better welding effect; the whole welding process is simple and easy to operate, can adapt to the relatively narrow bending edge characteristics of the water storage box, and can perform welding work on the corner weld 711 on the bending edge corner 530, thereby improving the efficiency of the welding work.

[0065] In the description of this specification, references to terms such as "some embodiments" or "as one might imagine" indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0066] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A welding fixture for a water storage box, characterized in that, include: A base plate (100) is provided with corner punches (110) and side frame punches (120). The corner punches (110) are located on the left and right sides of the rear side of the base plate (100), and the side frame punches (120) are located on the left and right sides of the front side of the base plate (100). A work station (130) is defined between the corner punches (110) and the side frame punches (120). The box workpiece (500) to be welded is placed on the base plate (100). At workstation (130), the box workpiece (500) has a rear bent edge (510) on the rear side, and the box workpiece (500) has side bent edges (520) on the left and right sides. The junction of the rear bent edge (510) and the side bent edge (520) is a bent edge corner (530). The corner punch (110) abuts against the lower side of the bent edge corner (530), and the side frame punch (120) abuts against the lower side of the side bent edge (520). Four clamping devices (200) are respectively located on the left and right sides of the base plate (100) and on the left and right sides of the rear side of the base plate (100). Each clamping device (200) includes a lower pressure head (210) located above the box workpiece (500). Two pressing plates (300) are respectively disposed between the lower pressing head (210) and the corresponding bending edge corner (530). The lower pressing head (210) can press down on the front and rear sides of the pressing plate (300) respectively. Each pressing plate (300) has a welding opening (310) and the welding opening (310) corresponds to the bending edge weld (531) on the bending edge corner (530).

2. The water storage box welding fixture according to claim 1, characterized in that, The corner punch (110) has a corner punch limiting surface (111) on its side wall. The corner punch limiting surface (111) abuts against the corner (501) of the box workpiece (500). The side frame punch (120) has a side frame punch limiting surface (121) on its side wall. The side frame punch limiting surface (121) abuts against the left and right outer side walls of the box workpiece (500).

3. The water storage box welding fixture according to claim 1, characterized in that, The pressing device (200) includes a pressing device base (230), on which an elastic extension arm (220) is provided, and the pressing head (210) is connected to the end of the elastic extension arm (220).

4. The water storage box welding fixture according to claim 3, characterized in that, The base of the clamping device (200) is provided with a sliding joint (240), and the edge of the base plate (100) is provided with a sliding groove (140). The sliding groove (140) has a side opening (141) on its side and an upper locking edge (142) that locks the sliding joint (240).

5. The water storage box welding fixture according to claim 4, characterized in that, The sliding joint (240) includes a circular column (241), and a sliding protrusion (242) is provided on the lower side wall of the circular column (241). The upper locking edge (142) locks the upper side of the sliding protrusion (242).

6. The water storage box welding fixture according to claim 5, characterized in that, A reset torsion spring (250) is provided between the sliding part (240) and the sliding groove (140).

7. The water storage box welding fixture according to claim 5, characterized in that, The base (230) of the clamping device is provided with a base bolt (260), which passes through the base (230) of the clamping device and abuts against the upper surface of the base plate (100).

8. The welding fixture for the water storage box according to claim 1, characterized in that, The pressing plate (300) has a rhomboid plate structure, and the front and rear sides of the pressing plate (300) are rhomboid corners (320). The pressing head (210) can press down the rhomboid corners (320).

9. The water storage box welding fixture according to claim 1, characterized in that, A drain nozzle (502) is provided on the lower side of the box workpiece (500), and a bottom hole (131) is provided on the workstation (130), the bottom hole (131) corresponding to the drain nozzle (502).

10. The welding fixture for the water storage box according to claim 1, characterized in that, A clamping device (400) is provided on the front side of the base plate (100), and a clamping head (410) is provided on the clamping device (400). The clamping head (410) can press against the front side wall of the box workpiece (500).

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