A welding fixture for distribution box production

Abstract

The utility model provides a kind of welding fixture for distribution box production, belong to welding fixture field.The fixture includes placing table, positioning plate, positioning clamping plate, bottom plate holder, support plate and positioning push plate, positioning plate is fixedly arranged in one end of placing table;Positioning plate is fixedly arranged in one end of placing table;Positioning clamping plate is configured to move on placing table;Bottom plate holder is configured to move the clamped bottom plate to the opening of U prefabricated frame;Support plate is arranged between the region surrounded by positioning clamping plate;Positioning push plate includes fixed push plate and movable push plate, fixed push plate and movable push plate are respectively arranged on positioning plate and positioning clamping plate, and the gap to be welded between back plate and U prefabricated frame, bottom plate is exposed by the lifting of fixed push plate and movable push plate, to complete the continuous welding between back plate and U prefabricated frame, bottom plate.The utility model specifically provides a kind of welding fixture for distribution box production, which can simultaneously position distribution box U prefabricated frame, bottom plate and back plate.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of welding fixtures, and particularly relates to a welding fixture for power distribution box production. BACKGROUND

[0002] As a core carrier for power distribution and control, the stability and sealing performance of the box body of a power distribution box are directly related to the operation safety and service life of internal electrical components. At present, the mainstream manufacturing process of the box body of a power distribution box is to first process a metal plate into a U-shaped prefabricated frame, and then fix a bottom plate and a back plate to corresponding positions of the U-shaped prefabricated frame through a welding process to form a complete box body structure.

[0003] The current welding operation process of a power distribution box usually adopts a step-by-step welding mode, that is, the bottom plate is first welded with the U-shaped prefabricated frame to form a frame body structure, and then the welding of the back plate is performed by adjusting the state of the frame body. This operation mode not only prolongs the production cycle of a single power distribution box and reduces the production efficiency, but also easily causes cumulative errors due to multiple clamping and positioning, thereby affecting the overall assembly accuracy of the box body. SUMMARY

[0004] In view of the above, in order to overcome the defects of the prior art, the application provides a welding fixture for power distribution box production to at least partially solve the problems raised in the background art.

[0005] The application provides the following technical scheme: the application provides a welding fixture for power distribution box production, which comprises:

[0006] A placement table is used to place a U-shaped prefabricated frame.

[0007] A positioning plate is fixed to one end of the placement table.

[0008] A positioning clamp plate is configured to move on the placement table, and the U-shaped prefabricated frame is clamped and positioned by the movement and positioning of the positioning plate and the positioning clamp plate.

[0009] A bottom plate holder is used to clamp a bottom plate and is configured to move the clamped bottom plate to the opening of the U-shaped prefabricated frame.

[0010] A support plate is used to place a back plate, and the support plate is arranged to be lifted between the areas surrounded by the positioning clamp plate.

[0011] A positioning push plate comprises a fixed push plate and a movable push plate, the movable push plate is connected with the positioning clamp plate, the movable push plate moves with the positioning clamp plate to adjust the relative position of the back plate and the U-shaped prefabricated frame, the fixed push plate and the movable push plate are respectively arranged to be lifted on the positioning plate and the positioning clamp plate, and the lifting of the fixed push plate and the movable push plate exposes the gap to be welded between the back plate, the U-shaped prefabricated frame and the bottom plate, so as to complete the continuous welding between the back plate, the U-shaped prefabricated frame and the bottom plate.

[0012] Further, the positioning clamping plate comprises a top plate clamping plate, a side plate outer clamping plate and a side plate inner clamping plate, the top plate clamping plate moves relative to the positioning plate, the side plate outer clamping plate and the side plate inner clamping plate are perpendicular to the moving direction of the top plate clamping plate, the top plate clamping plate and the positioning plate are used for fixing the top plate of the U-shaped prefabricated frame, and the side plate outer clamping plate and the side plate inner clamping plate are both provided with two groups, the two groups of side plate outer clamping plates move synchronously and reversely, the two groups of side plate inner clamping plates move synchronously and reversely, and one group of side plate outer clamping plates and one group of side plate inner clamping plates are used for fixing one side plate of the U-shaped prefabricated frame.

[0013] Further, the placing table is provided with a first moving groove and a second moving groove, the second moving groove is arranged through the placing table, the first moving groove is rotatably provided with a first moving lead screw, the placing table is provided with a first motor, the output end of the first motor is connected with the first moving lead screw, the top plate clamping plate is connected with the first moving lead screw through threads, the lower end of the top plate clamping plate is clamped and slid in the first moving groove, the second moving groove is rotatably provided with a second moving lead screw and a third moving lead screw, the second moving groove is provided with a moving guide rod, the placing table is provided with a second motor and a third motor, the output end of the second motor is connected with the second moving lead screw, the output end of the third motor is connected with the third moving lead screw, the side plate inner clamping plate is connected with the second moving lead screw through threads, the side plate inner clamping plate is slid on the moving guide rod, and the side plate outer clamping plate is connected with the third moving lead screw through threads.

[0014] Further, the positioning push plate is rotatably provided with a rolling roller on the side facing the inside of the placing table.

[0015] Further, the positioning plate and the side plate outer clamping plate are both fixedly provided with lifting cylinders, the positioning push plate is connected with the lifting cylinders, the positioning push plate is driven to lift through the extension and contraction of the lifting cylinders.

[0016] Further, the side plate outer clamping plate is connected with a connecting plate, the connecting plate slides below the placing table, and one end of the connecting plate is provided with a pushing plate.

[0017] Further, the bottom plate holder comprises a supporting frame, a clamping frame, a position adjusting roller and a fixing plate, the upper surface of the supporting frame is flush with the upper surface of the placing table, two groups of clamping frames are slidably arranged on the supporting frame, the spacing between the two groups of clamping frames is adjustable, the position adjusting roller is rotatably arranged in the clamping frame, and the fixing plate slides in the clamping frame.

[0018] Further, the supporting frame and the clamping frame are both provided with pushing cylinders, the free ends of the pushing cylinders on the clamping frame and the supporting frame are connected with the clamping frame, and the free ends of the pushing cylinders on the clamping frame and the supporting frame are connected with the fixing plate.

[0019] Further, the placing table is provided with a pushing mechanism, the support frame is connected with the pushing mechanism, the support frame is driven to move by the pushing mechanism, the pushing mechanism comprises a support, a pushing motor, a pushing screw rod and a pushing slide rod, the pushing motor is arranged on the support, the pushing screw rod is rotatably arranged on the support and the placing table, the pushing screw rod is connected with the output end of the pushing motor, the pushing slide rod is arranged between the support and the placing table, the support frame is connected with the pushing screw rod through screw threads, and the support frame is slidably arranged on the pushing slide rod.

[0020] Further, the placing table is provided with a telescopic air cylinder, a mounting frame is arranged on the free end of the telescopic air cylinder, a negative pressure pump is arranged on the mounting frame, the support plate is arranged on the mounting frame, a negative pressure cavity is arranged in the support plate, a negative pressure hole is arranged on the upper surface of the support plate, and the negative pressure pump is in communication with the negative pressure cavity through a negative pressure pipe.

[0021] Further, the placing table is provided with an auxiliary guide rod, and the connecting plate is slidably arranged on the auxiliary guide rod.

[0022] The beneficial effects achieved by the above structure are as follows:

[0023] (1) The U-shaped prefabricated frame is positioned and clamped by the positioning clamping plate, the bottom plate is driven to move by the bottom plate holder, the movable push plate pushes the back plate to move, the synchronous positioning and splicing of the bottom plate, the back plate and the U-shaped prefabricated frame are realized, the traditional step-by-step welding mode is replaced, and the production cycle of a single distribution box is shortened.

[0024] (2) While the U-shaped prefabricated frame is positioned and clamped by the outer clamping plate of the side plate, the movable push plate and the movable push plate are driven to move, the movable push plate and the movable push plate adjust the positions of the bottom plate and the back plate, and the U-shaped prefabricated frame, the bottom plate and the back plate are quickly and accurately aligned.

[0025] (3) The positioning push plate is arranged to be liftable, so as to avoid blocking the gap between the back plate and the U-shaped prefabricated frame and the bottom plate, facilitate direct welding operation at the gap, and reduce the adjustment time between processes. DETAILED DESCRIPTION

[0026] The accompanying drawings are included to provide a further understanding of the application, and constitute a part of the specification, together with the embodiments of the application, to explain the application, and do not constitute a limitation on the application. In the drawings:

[0027] Figure 1 The overall structure of the embodiment of the application is shown Figure One ;

[0028] Figure 2 The overall structure of the embodiment of the application is shown Figure Two ;

[0029] Figure 3A schematic view of the cross-sectional structure of the main view direction of the embodiment of the present application;

[0030] Figure 4 A schematic view of the structure of the placement table in the side view direction of the embodiment of the present application;

[0031] Figure 5 A schematic view of the three-dimensional cross-sectional structure of the placement table of the embodiment of the present application;

[0032] Figure 6 A schematic view of the three-dimensional cross-sectional structure of the main view direction of the bottom plate holder of the embodiment of the present application;

[0033] Figure 7 A schematic view of the three-dimensional cross-sectional structure of the top view direction of the bottom plate holder of the embodiment of the present application;

[0034] Figure 8 A schematic view of the placement structure of the U-shaped prefabricated frame on the placement table of the embodiment of the present application.

[0035] Wherein, 1, placement table, 2, positioning plate, 3, positioning clamping plate, 4, bottom plate holder, 5, support plate, 6, positioning push plate, 7, fixed push plate, 8, movable push plate, 9, top plate clamping plate, 10, side plate outer clamping plate, 11, side plate inner clamping plate, 12, first moving groove, 13, second moving groove, 14, first moving lead screw, 15, first motor, 16, second moving lead screw, 17, third moving lead screw, 18, moving guide rod, 19, second motor, 20, third motor, 21, rolling roller, 22, connecting plate, 23, push plate, 24, support frame, 25, clamping frame, 26, positioning roller, 27, fixed plate, 28, push cylinder, 29, support, 30, push motor, 31, push screw, 32, push slide rod, 33, telescopic cylinder, 34, mounting frame, 35, negative pressure pump, 36, negative pressure cavity, 37, negative pressure hole, 38, auxiliary guide rod, 39, lifting cylinder, 40, U-shaped prefabricated frame. DETAILED DESCRIPTION

[0036] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0037] It should be noted that the words "front", "back", "left", "right", "up" and "down" used in the following description refer to the directions in the drawings, and the words "in" and "out" refer to the directions towards or away from the geometric center of a particular component.

[0038] ReferenceFigures 1-2 The embodiment provides a welding clamp for power distribution box production, which comprises a placing table 1, a positioning plate 2, a positioning clamp plate 3, a bottom plate holder 4, a supporting plate 5 and a positioning push plate 6. The placing table 1 is used for placing a U-shaped prefabricated frame 40. The positioning plate 2 is fixed at one end of the placing table 1. The positioning clamp plate 3 is arranged to move on the placing table 1. The positioning plate 2 is used for clamping and positioning the U-shaped prefabricated frame 40 by moving and the positioning clamp plate 3. The clamping and fixing requirements of the U-shaped prefabricated frame 40 with different sizes are met by moving the positioning clamp plate 3. The bottom plate holder 4 is used for clamping a bottom plate and is arranged to drive the clamped bottom plate to move to the opening of the U-shaped prefabricated frame 40. The positioning and splicing of the bottom plate and the U-shaped prefabricated frame 40 are realized by clamping and moving the bottom plate holder 4. The supporting plate 5 is used for placing a back plate. The supporting plate 5 is arranged to be lifted between the areas surrounded by the positioning clamp plate 3. The supporting plate 5 is arranged to be adjustable in the vertical spacing relative to the placing table 1 by lifting, so as to meet the positioning and splicing requirements of the back plate of the power distribution box with different depths and the U-shaped prefabricated frame 40. The positioning push plate 6 comprises a fixed push plate 7 and a movable push plate 8. The movable push plate 8 is connected with the positioning clamp plate 3 and moves with the positioning clamp plate 3, so as to adjust the relative position of the back plate and the U-shaped prefabricated frame 40. The fixed push plate 7 and the movable push plate 8 are respectively arranged to be lifted on the positioning plate 2 and the positioning clamp plate 3. The gaps to be welded between the back plate and the U-shaped prefabricated frame and the bottom plate are exposed by lifting the fixed push plate 7 and the movable push plate 8, so as to realize the continuous welding between the back plate and the U-shaped prefabricated frame and the bottom plate. When the back plate is placed on the supporting plate 5, one end of the back plate is in contact with the fixed push plate 7. The fixed push plate 7 preliminarily positions the placing position of the back plate. When the positioning clamp plate 3 drives the movable push plate 8 to move, the movable push plate 8 pushes the back plate placed on the upper end of the U-shaped prefabricated frame 40 to move, so as to adjust the position of the back plate. After the position of the back plate is adjusted, the positioning push plate 6 is controlled to be lowered relative to the positioning clamp plate 3, so as to avoid that the positioning push plate 6 shields the gap between the back plate and the U-shaped prefabricated frame 40, and facilitate the subsequent welding operation on the gap.

[0039] In use, the U-shaped prefabricated frame 40 is placed on the placement table 1, the top plate of the U-shaped prefabricated frame 40 is in contact with the positioning plate 2, the placement position of the U-shaped prefabricated frame 40 is positioned through the positioning plate 2, at the same time, the bottom plate is placed on the bottom plate holder 4, and the back plate is placed on the supporting plate 5. The positioning clamping plate 3 is driven to move, the two side plates of the U-shaped prefabricated frame 40 are clamped and fixed by the moving positioning clamping plate 3, at the same time, the bottom plate holder 4 drives the bottom plate to move to the position of the U-shaped prefabricated frame 40, so that the bottom plate and the U-shaped prefabricated frame 40 are positioned and spliced; the positioning clamping plate 3 drives the movable push plate 8 to move in the moving process, the movable push plate 8 moves to correspond to the position of the U-shaped prefabricated frame 40, so that the back plate and the U-shaped prefabricated frame 40 are positioned and spliced. Then, the two welds corresponding to the bottom plate and the U-shaped prefabricated frame 40 are welded, and after the welding is completed, all the positioning push plates 6 are controlled to descend, so that the positioning push plates 6 descend from the four sides of the back plate and correspond to the positions of the two side plates of the U-shaped prefabricated frame 40, and the gaps of the back plate and the U-shaped prefabricated frame 40 and the bottom plate are welded.

[0040] Specifically, referring to Figure 1 and Figure 2 In the embodiment, the positioning clamping plate 3 includes a top plate clamping plate 9, a side plate outer clamping plate 10 and a side plate inner clamping plate 11, the top plate clamping plate 9 moves relative to the positioning plate 2, the side plate outer clamping plate 10 and the side plate inner clamping plate 11 are perpendicular to the moving direction of the top plate clamping plate 9, the top plate clamping plate 9 and the positioning plate 2 are used for fixing the top plate of the U-shaped prefabricated frame 40, and the side plate outer clamping plate 10 and the side plate inner clamping plate 11 are both provided with two groups, the two groups of side plate outer clamping plates 10 move synchronously and reversely, the two groups of side plate inner clamping plates 11 move synchronously and reversely, and one group of side plate outer clamping plates 10 and one group of side plate inner clamping plates 11 are used for fixing one side plate of the U-shaped prefabricated frame 40.

[0041] In use, the top plate of the U-shaped prefabricated frame 40 is located between the top plate clamping plate 9 and the positioning plate 2, one side plate of the U-shaped prefabricated frame 40 is located between one group of side plate outer clamping plates 10 and side plate inner clamping plates 11, and the other side plate is located between the other group of side plate outer clamping plates 10 and side plate inner clamping plates 11. The relative positions of the top plate clamping plate 9 and the positioning plate 2 are adjusted to clamp and fix the top plate of the U-shaped prefabricated frame 40; at the same time, the two groups of side plate outer clamping plates 10 and the two groups of side plate inner clamping plates 11 are adjusted, the two groups of side plate outer clamping plates 10 are moved synchronously and reversely, and the two groups of side plate inner clamping plates 11 are moved synchronously and reversely to fix the two side plates of the U-shaped prefabricated frame 40.

[0042] Specifically, referring to Figures 1-5In the embodiment, the first moving groove 12 and the second moving groove 13 are arranged on the placing table 1, the second moving groove 13 penetrates the placing table 1, the first moving screw 14 is rotatably arranged in the first moving groove 12, the first motor 15 is arranged on the placing table 1, the output end of the first motor 15 is connected with the first moving screw 14, the top clamping plate 9 is connected with the first moving screw 14 through screw thread, the lower end of the top clamping plate 9 is clamped and slidably arranged in the first moving groove 12, the first moving groove 12 limits and guides the movement of the top clamping plate 9, the second moving screw 16 and the third moving screw 17 are rotatably arranged in the second moving groove 13, the moving guide rod 18 is arranged in the second moving groove 13, the second motor 19 and the third motor 20 are arranged on the placing table 1, the output end of the second motor 19 is connected with the second moving screw 16, the output end of the third motor 20 is connected with the third moving screw 17, the inner side clamping plate 11 of the side plate is connected with the second moving screw 16 through screw thread, the inner side clamping plate 11 of the side plate is slidably arranged on the moving guide rod 18, the outer side clamping plate 10 of the side plate is connected with the third moving screw 17 through screw thread, and the outer side clamping plate 10 of the side plate is slidably arranged on the moving guide rod 18.

[0043] It can be understood that, in the embodiment, the second moving screw 16 and the third moving screw 17 are bidirectional screws. In use, the first motor 15 drives the first moving screw 14 to rotate, the first moving screw 14 drives and the first moving groove 12 guides the position of the top clamping plate 9, the second motor 19 drives the second moving screw 16 to rotate, the second moving screw 16 drives and the moving guide rod 18 guides the position of the inner side clamping plate 11 of the side plate, and the third motor 20 drives the third moving screw 17 to rotate, the third moving screw 17 drives and the moving guide rod 18 guides the position of the outer side clamping plate 10 of the side plate.

[0044] Specifically, referring to Figures 1-5 In the embodiment, the positioning push plate 6 is rotatably arranged with a rolling roller 21 on the side facing the inside of the placing table 1. When the positioning push plate 6 is driven to descend, the rolling roller 21 can reduce the friction between the positioning push plate 6 and the back plate and the U-shaped prefabricated frame 40.

[0045] Specifically, referring to Figures 1-5 In the embodiment, the positioning plate 2 and the outer side clamping plate 10 of the side plate are both fixedly arranged with a lifting cylinder 39, the positioning push plate 6 is connected with the lifting cylinder 39, the lifting cylinder 39 drives the positioning push plate 6 to ascend and descend, and it can be understood that the mode in which the lifting cylinder 39 drives the positioning push plate 6 to ascend and descend is only a specific embodiment of the present scheme.

[0046] Specifically, referring to Figures 1-5In the embodiment, the side plate outer clamping plate 10 is connected with a connecting plate 22, the connecting plate 22 slides below the placing table 1, one end of the connecting plate 22 is provided with a pushing plate 23, the pushing plate 23 corresponds to the initial position of the bottom plate clamping device 4, the bottom plate is placed on the bottom plate clamping device 4, when the side plate outer clamping plate 10 drives the pushing plate 23 to move, the pushing plate 23 adjusts the position of the bottom plate on the bottom plate clamping device 4, so that the bottom plate corresponds to the position of the U-shaped prefabricated frame 40.

[0047] Specifically, referring to Figure 1 , Figure 2 , Figure 6 and Figure 7 , in the embodiment, the bottom plate clamping device 4 includes a support frame 24, a clamping frame 25, a position adjusting roller 26 and a fixing plate 27, the upper surface of the support frame 24 is flush with the upper surface of the placing table 1, two groups of clamping frames 25 are slidably arranged on the support frame 24, the distance between the two groups of clamping frames 25 is adjustable, the position adjusting roller 26 is rotatably arranged in the clamping frame 25, the bottom plate is placed between the two groups of position adjusting rollers 26, when the pushing plate 23 pushes the bottom plate to move on the support frame 24, the two groups of position adjusting rollers 26 rotate to adjust the position of the bottom plate, the fixing plate 27 slides in the clamping frame 25, and the relative position between the fixing plate 27 and the outer surface of the position adjusting roller 26 is adjusted by the sliding of the fixing plate 27 in the clamping frame 25.

[0048] Specifically, referring to Figure 6 and Figure 7 , in the embodiment, the support frame 24 and the clamping frame 25 are both provided with a pushing cylinder 28, the clamping frame 25 is connected with the free end of the pushing cylinder 28 on the support frame 24, the fixing plate 27 is connected with the free end of the pushing cylinder 28 on the clamping frame 25, and the stable clamping and positioning of the bottom plate with different thicknesses can be achieved by the arrangement of the pushing cylinder 28; it can also be understood that the mode of driving the clamping frame 25 and the fixing plate 27 to move by the pushing cylinder 28 is only a specific embodiment of the scheme.

[0049] In use, the pushing cylinder 28 on the support frame 24 adjusts the distance between the two groups of clamping frames 25 to adapt to the thickness of the bottom plate, the bottom plate is placed between the two groups of position adjusting rollers 26, when the outer surface of the position adjusting roller 26 is more protruding than the outer surface of the fixing plate 27, the position adjusting roller 26 rotates to adjust the position of the bottom plate when the pushing plate 23 pushes the bottom plate to move on the support frame 24; after the position of the bottom plate is adjusted, the pushing cylinder 28 on the clamping frame 25 drives the fixing plate 27 to move, when the outer surface of the fixing plate 27 is more protruding than the outer surface of the position adjusting roller 26, the fixing plate 27 clamps and fixes the bottom plate, and drives the bottom plate to approach the U-shaped prefabricated frame 40 and positionally splice the U-shaped prefabricated frame 40 with the driving of the pushing mechanism.

[0050] Specifically, referring to Figure 1 and Figure 2In the embodiment, the placing table 1 is provided with a pushing mechanism, the supporting frame 24 is connected with the pushing mechanism, the supporting frame 24 is driven to move by the pushing mechanism, the pushing mechanism comprises a support 29, a pushing motor 30, a pushing screw 31 and a pushing slide rod 32, the pushing motor 30 is arranged on the support 29, the pushing screw 31 is rotatably arranged on the support 29 and the placing table 1, the pushing screw 31 is connected with the output end of the pushing motor 30, the pushing slide rod 32 is arranged between the support 29 and the placing table 1, the supporting frame 24 is connected with the pushing screw 31 through screwing, and the supporting frame 24 is slidably arranged on the pushing slide rod 32.

[0051] In use, the pushing motor 30 is started, the pushing motor 30 drives the pushing screw 31 to rotate, and the position of the bottom plate holder 4 is adjusted under the driving of the pushing screw 31 and the guidance of the pushing slide rod 32.

[0052] Specifically, referring to Figures 3-5 In the embodiment, the placing table 1 is provided with a telescopic air cylinder 33, the free end of the telescopic air cylinder 33 is provided with a mounting frame 34, the mounting frame 34 is provided with a negative pressure pump 35, the supporting plate 5 is arranged on the mounting frame 34, the supporting plate 5 is provided with a negative pressure cavity 36 in the supporting plate 5, the upper surface of the supporting plate 5 is provided with a negative pressure hole 37, and the negative pressure pump 35 is communicated with the negative pressure cavity 36 through a negative pressure pipe.

[0053] When working, the back plate is placed on the supporting plate 5, the back plate is pushed to move when the movable push plate 8 moves, the back plate is completely located above the U-shaped prefabricated frame 40, the supporting plate 5 is subjected to negative pressure under the action of the negative pressure pump 35, the back plate is stably adsorbed on the supporting plate 5 under the action of the negative pressure, the back plate is lowered by the telescopic air cylinder 33, and the back plate is stably arranged on the U-shaped prefabricated frame 40 and the bottom plate, so that the positioning and splicing of the back plate, the U-shaped prefabricated frame 40 and the bottom plate are completed.

[0054] Specifically, referring to Figure 1 In the embodiment, the placing table 1 is provided with an auxiliary guide rod 38, the connecting plate 22 is slidably arranged on the auxiliary guide rod 38, and the setting of the auxiliary guide rod 38 improves the movement of the push plate 23 driven by the connecting plate 22, so that the stability of the position adjustment of the bottom plate is improved.

[0055] The working principle of the welding clamp for power distribution box production provided in the embodiment is as follows:

[0056] (1) The second motor 19 is started, the second motor 19 drives the second moving lead screw 16 to rotate, the two groups of inner clamping plates 11 of the side plates are driven to move through the driving of the second moving lead screw 16 and the guidance of the moving guide rod 18, and the distance between the outer sides of the two groups of inner clamping plates 11 is equal to the distance between the two side plates of the U-shaped prefabricated frame 40;

[0057] (2) Place the U-shaped prefabricated frame 40 on the placement table 1, and make the top plate of the U-shaped prefabricated frame 40 contact with the positioning plate 2, and the inner walls of the two side plates of the U-shaped prefabricated frame 40 respectively contact with the two groups of side plate inner clamping plates 11;

[0058] (3) Start the first moving lead screw 14 driven by the first motor 15 to rotate, and the first moving lead screw 14 drives the top plate clamping plate 9 to approach the top plate of the U-shaped prefabricated frame 40, and the top plate clamping plate 9 and the positioning plate 2 clamp and fix the top plate of the U-shaped prefabricated frame 40;

[0059] (4) Place the bottom plate between the two groups of clamping frames 25, adjust the position of the clamping frame 25 through the push cylinder 28 on the support frame 24, so that the two groups of position adjusting rollers 26 contact with the surface of the bottom plate; then place the back plate on the support plate 5, one end of the back plate contacts with the rolling roller 21 of the fixed push plate 7, and the rolling roller 21 preliminarily positions the placement position of the back plate;

[0060] (5) Start the third motor 20, and the third motor 20 drives the third moving lead screw 17 to rotate, and drives the two groups of side plate outer clamping plates 10 to move through the driving of the third moving lead screw 17 and the guidance of the moving guide rod 18, and the two groups of side plate outer clamping plates 10 approach the two side plates of the U-shaped prefabricated frame 40 from the outside;

[0061] (6) In the process of moving the side plate outer clamping plate 10, the side plate outer clamping plate 10 drives the push plate 23 and the movable push plate 8 to move through the connecting plate 22, the push plate 23 applies force to the bottom plate, and adjusts the position of the bottom plate under the cooperation of the position adjusting roller 26, and at the same time, the movable push plate 8 applies force to the back plate, and adjusts the position of the back plate; until the two groups of side plate outer clamping plates 10 respectively contact with the outer walls of the two side plates of the U-shaped prefabricated frame 40;

[0062] (7) The two groups of side plate outer clamping plates 10 cooperate with the two groups of side plate inner clamping plates 11 to fix the two side plates of the U-shaped prefabricated frame 40, and the bottom plate and the back plate are pushed to accurately correspond to the U-shaped prefabricated frame 40;

[0063] Start the push cylinder 28 on the clamping frame 25 to drive the fixed plate 27 to move, the two groups of fixed plates 27 cooperate to clamp the bottom plate, and drive the advancing screw 31 to rotate under the action of the advancing motor 30, and drive the bottom plate to move towards the U-shaped prefabricated frame 40 through the driving of the advancing screw 31 and the guidance of the advancing slide rod 32, to complete the positioning and splicing of the bottom plate and the U-shaped prefabricated frame 40;

[0064] Through the negative pressure pump 35 to draw negative pressure in the negative pressure cavity 36, and under the action of the negative pressure hole 37, the back plate is stably adsorbed by negative pressure, the telescopic cylinder 33 is started to drive the back plate to move downward, so that the back plate is stably pressed on the bottom plate and the U-shaped prefabricated frame 40, to complete the positioning and splicing of the back plate, the bottom plate and the U-shaped prefabricated frame 40;

[0065] (8) The welding is carried out at the joint gap between the bottom plate and the U-shaped prefabricated frame 40, after the welding is completed, the lifting cylinder 39 is started to drive the positioning push plate 6 and the rolling roller 21 installed therein to descend, so that the positioning push plate 6 and the rolling roller 21 move to the outside of the U-shaped prefabricated frame 40, avoiding the positioning push plate 6 and the rolling roller 21 from shielding the joint gap between the back plate, the bottom plate and the U-shaped prefabricated frame 40, facilitating the welding of the back plate, the bottom plate and the U-shaped prefabricated frame 40.

[0066] It is to be noted that, in the present document, relational terms such as first and second and the like can be used solely to distinguish one entity or action from another entity or action without necessarily implying any actual relationship or order between such entities or actions. Also, the terms "comprises", "comprising", or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus.

[0067] While the embodiments of the application have been illustrated and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the spirit and scope of the application, which is defined by the appended claims and their equivalents.

Claims

1. A welding jig for distribution box production, characterized by, The utility model relates to a continuous welding device for U-shaped prefabricated frame, which comprises a placing table (1) for placing a U-shaped prefabricated frame (40), a positioning plate (2) fixedly arranged at one end of the placing table (1), a positioning clamp plate (3) movably arranged on the placing table (1), the positioning clamp plate (3) comprising a top plate clamp plate (9), a side plate outer clamp plate (10) and a side plate inner clamp plate (11), the top plate clamp plate (9) being movable relative to the positioning plate (2), the side plate outer clamp plate (10) and the side plate inner clamp plate (11) being perpendicular to the moving direction of the top plate clamp plate (9), the top plate clamp plate (9) and the positioning plate (2) being used for fixing the top plate of the U-shaped prefabricated frame (40), the side plate outer clamp plate (10) and the side plate inner clamp plate (11) each being provided with two groups, the two groups of side plate outer clamp plates (10) being synchronously and reversely movable, the two groups of side plate inner clamp plates (11) being synchronously and reversely movable, one group of side plate outer clamp plates (10) and one group of side plate inner clamp plates (11) being used for fixing one side plate of the U-shaped prefabricated frame (40), a bottom plate holder (4) for clamping a bottom plate and moving the clamped bottom plate to the opening of the U-shaped prefabricated frame (40), a support plate (5) for placing a back plate and being arranged between the areas surrounded by the positioning clamp plate (3), a positioning push plate (6) comprising a fixed push plate (7) and a movable push plate (8), the movable push plate (8) being connected with the positioning clamp plate (3) and moving with the positioning clamp plate (3) to adjust the relative position between the back plate and the U-shaped prefabricated frame (40), the fixed push plate (7) and the movable push plate being respectively arranged on the positioning plate (2) and the positioning clamp plate (3), the gaps to be welded between the back plate and the U-shaped prefabricated frame (40) and the bottom plate being exposed by the lifting of the fixed push plate (7) and the movable push plate to complete the continuous welding between the back plate and the U-shaped prefabricated frame (40) and the bottom plate. The positioning push plate (6) is rotatably provided with a rolling roller (21) on the side facing the inside of the placing table (1). The side plate outer clamp plate (10) is connected with a connecting plate (22), the connecting plate (22) is slidably arranged below the placing table (1), and one end of the connecting plate (22) is provided with a pushing plate (23). The bottom plate holder (4) comprises a support frame (24), a clamping frame (25), a position adjusting roller (26) and a fixing plate (27), the upper surface of the support frame (24) is flush with the upper surface of the placing table (1), two groups of clamping frames (25) are slidably arranged on the support frame (24), the distance between the two groups of clamping frames (25) is adjustable, the position adjusting roller (26) is rotatably arranged in the clamping frame (25), and the fixing plate (27) is slidably arranged in the clamping frame (25). The placing table (1) is provided with a pushing mechanism, the support frame (24) is connected with the pushing mechanism, and the support frame (24) is driven to move by the pushing mechanism. ​ ​ 2. The welding fixture for production of an electrical distribution box according to claim 1, characterized in that, ​ 3. The welding fixture for production of an electrical distribution box according to claim 1, characterized in that, ​ 4. The welding fixture for production of an electrical distribution box according to claim 1, characterized in that, ​ 5. The welding fixture for production of an electrical distribution box according to claim 4, characterized in that, ​ 6. The welding fixture for production of an electrical box according to claim 1, characterized in that, The placing table (1) is provided with a telescopic air cylinder (33), the free end of the telescopic air cylinder (33) is provided with a mounting rack (34), the mounting rack (34) is provided with a negative pressure pump (35), the supporting plate (5) is arranged on the mounting rack (34), the supporting plate (5) is provided with a negative pressure cavity (36), the upper surface of the supporting plate (5) is provided with a negative pressure hole (37), and the negative pressure pump (35) is communicated with the negative pressure cavity (36) through a negative pressure pipe.

7. The welding fixture for production of an electrical distribution box according to claim 3, characterized in that, The placing table (1) is provided with an auxiliary guide rod (38), and the connecting plate (22) is slidably arranged on the auxiliary guide rod (38).

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