Distribution box assembly welding device and assembly welding method thereof

Abstract

The present invention discloses a distribution box assembly welding device and an assembly welding method thereof, and relates to the technical field of distribution box assembly. The distribution box assembly welding device comprises a central axis, two groups of welding guns axially symmetrically arranged on a casing relative to the central axis, a moving assembly arranged in the casing, the moving assembly being used to drive the two groups of welding guns to synchronously move in opposite directions, and an angle adjustment assembly arranged on the moving path of the welding gun, the angle adjustment assembly using the movement of the welding gun as a driving force to change the angle of the welding gun, and the angle adjustment assembly can open the welding gun to a desired angle. By using the central axis as the welding zero point, driving the two groups of welding guns to move in opposite directions and self-adjust the welding angle, moving toward and approaching the opposite welds of the distribution box, double welding of the distribution box welds is achieved, the welding travel path is shorter, and the two groups of welds of the distribution box can be welded synchronously at a single time, which improves welding efficiency while greatly improving welding quality and ensuring welding accuracy.

Description

Technical Field

[0001] The present invention relates to the technical field of distribution box assembly, in particular to a distribution box assembly welding device and an assembly welding method thereof. Background Art

[0002] As an important component of power equipment, the distribution box realizes the safe and efficient operation of the power system by integrating distribution, protection, monitoring and other functions. It is an indispensable core equipment in modern electrical engineering. The distribution box is usually produced by welding. With the increase in production demand, the traditional assembly method of the distribution box has gradually developed from the assembly of the bottom plate and four side panels to the assembly of the bottom plate and two side panels. By using bending equipment, the bottom plate of the distribution box and the long or short sides on both sides are bent into a U-shaped structure, and then the missing long or short sides are inserted into the openings on both sides of the U-shaped structure. The corresponding welding process is used to weld it into one piece.

[0003] For example, Chinese patent publication number CN116532858B discloses an automatic welding device for distribution box production. This type of distribution box welding device loads the distribution box on a circular table, uses a lifting mechanism to drive the lifting and lowering of the distribution box on the circular table, and a first adjustment mechanism drives the segmented rotation of the distribution box on the circular table, so that the weld of the distribution box is close to the welding gun, and then uses a second adjustment mechanism to drive the welding gun to move up and down to achieve the welding assembly work of the distribution box.

[0004] However, the existing method of using multiple mechanisms to coordinate and coordinate to achieve the alignment of the welding gun on the distribution box weld has a long welding travel path, which takes a long time to weld. In addition, the multiple travel paths are prone to deviations in the alignment of the welding paths, resulting in the inability to fully guarantee the welding quality. Summary of the Invention

[0005] In view of the deficiencies in the prior art, the present invention provides a distribution box assembly welding device and an assembly welding method thereof, which solve the problems raised in the background art.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: On the one hand, the present invention provides a distribution box assembly welding device, including: a central axis; a casing, the casing is arranged on the central axis through a side support seat; a welding gun, the welding gun is provided in two groups, and the two groups of welding guns are axially symmetrically arranged on the casing relative to the central axis; a moving component, the moving component is arranged in the casing, and the moving component is used to drive the two groups of welding guns to move synchronously in opposite directions; an angle adjustment component, the angle adjustment component is located on the moving path of the welding gun, the angle adjustment component uses the movement of the welding gun as power to change the angle of the welding gun, and the angle adjustment component can make the welding gun open to the required angle.

[0007] Furthermore, it also includes a rotating shaft, which is provided on the welding gun, and the rotation of the rotating shaft is used to control the angle of the welding gun; the angle adjustment component includes: a fixed seat, which is assembled on the end of the rotating shaft away from the welding gun; a driving gear, which is located on the fixed seat and is used to drive the rotating shaft to rotate; a driving gear row, which is located on the moving path of the welding gun and meshes with the driving gear; the driving gear row is arranged in a split manner along the moving path of the welding gun, and each driving gear row can selectively mesh with the driving gear.

[0008] Furthermore, it also includes: an adjusting gear, which is arranged at the midline position of the interval between the two rows of drive gears, and two groups of adjusting racks are staggered and meshed at the upper and lower ends of the adjusting gear; an adjusting push plate, which is provided in two groups, and the two groups of adjusting push plates are staggered on the two groups of adjusting racks, and slide into the upper and lower ends of the two rows of drive gears respectively.

[0009] Furthermore, a pressure-bearing groove adapted to the adjusting push plate is provided on the driving gear row, and an inclined surface that slides into the pressure-bearing groove is provided at one end of the adjusting push plate, so that after the inclined surface is pressed into the pressure-bearing groove, the inclined surface gradually pushes the pressure-bearing groove forward until the adjusting push plate slides forward to fix the driving gear row.

[0010] Furthermore, the back plate of the driving gear row is provided with a support plate, and an arm force guide rod supporting the driving gear row is provided through the support plate, and a return spring for pushing the driving gear row forward and then returning it to its original position is provided on the arm force guide rod.

[0011] Furthermore, it also includes: a transmission worm wheel installed on the rotating shaft and a transmission worm screw installed on the fixed seat along the moving direction of the welding gun, the transmission worm wheel is engaged with the transmission worm screw, and the transmission worm screw is coaxial with the driving gear, so that the rotating shaft forms a self-locking function.

[0012] Furthermore, it also includes a locking block arranged at the other end of the rotating shaft and a locking slide rail of the staggered drive gear row arranged on the displacement track of the locking block, and the locking slide rail is provided with a locking slide groove opposite to the locking block along its guide rail direction; the locking block is a regular polygonal structure, and the number of positive sides of the locking block is an even number, so that when the rack meshing force of the driving gear and the driving gear row is converted into the rated rotational force to drive the rotating shaft to rotate quantitatively, the positive side of the locking block rotates synchronously with the rotating shaft, and always keeps the positive side aligned up and down and slides into the locking slide groove to form a secondary self-locking.

[0013] Furthermore, a welding positioning assembly for driving the rotation and lifting of the welding guns is provided at one axial end of the central shaft, which is used to drive the two groups of welding guns to rotate until the opposing welds of the distribution box are flush, and control the lifting and lowering displacement of the two groups of welding guns to perform double welding on the welds, wherein: the welding positioning assembly includes: a screw elevator, which is provided at one axial end of the central shaft, and the screw elevator is fixedly connected to the central shaft through a suspension support seat, so that the screw of the screw elevator is telescopic to drive the welding guns to move up and down to the weld of the distribution box; a fixed gear, which is fixed on the central shaft, and a moving gear is engaged with one side of the fixed gear, so that the moving gear is engaged and transmitted along the circumferential direction of the fixed gear, driving the two groups of welding guns to rotate with the central shaft as the center until the welds of the distribution box are flush.

[0014] Furthermore, a welding table assembly is provided at the other axial end of the central axis, which supports the distribution box and drives the displacement of the distribution box, and is used to drive the distribution box to translate relative to the welding gun for double welding, wherein: the welding table assembly includes a track frame, the track frame is set at the other axial end of the central axis, and a supporting slide is provided on the track frame, and a tooling mold is provided on the supporting slide, so that the supporting slide pushes the tooling mold to displace, driving the distribution box in the tooling mold to translate along the welding gun for welding.

[0015] On the other hand, the present invention also provides a distribution box assembly welding method, comprising the following steps:

[0016] Step 1: Load the distribution box onto the tooling mold, and align the center of the distribution box with the central axis;

[0017] Step 2: The two welding guns move synchronously in opposite directions toward the corner weld of the distribution box. At the beginning of the movement, the movement is used as the driving force to drive the two welding guns in opposite directions to open the welding angle required for the corner weld.

[0018] Step 3: The two sets of welding guns are lifted and braked to realize double welding of the corner welds of the distribution box. After the welding of one set of corner welds is completed, they are rotated to the other set of corner welds for double welding again;

[0019] Step 4: Move the two welding guns closer to the center axis to reset and calibrate to zero. Then, in the same way as step 2, drive the two welding guns to move to the horizontal weld of the distribution box and open the welding angle required for the horizontal weld in the opposite direction.

[0020] Step 5: The two sets of welding guns are lifted and braked close to the horizontal weld. At this time, the tooling mold pushes the distribution box to move horizontally to achieve double welding of the horizontal weld of the distribution box.

[0021] The present invention has the following beneficial effects:

[0022] (1) The distribution box assembly welding device uses the central axis as the welding zero point to drive two sets of welding guns to move in opposite directions and self-adjust the welding angle to move toward and approach the opposite welds of the distribution box, thereby realizing double welding of the distribution box welds. While its welding travel path is shorter, it can simultaneously weld two sets of welds of the distribution box at a time, thereby improving welding efficiency and greatly improving welding quality, ensuring welding accuracy.

[0023] (2) The distribution box assembly welding device can realize the adjustment and calibration of the welding positions of two sets of welding guns and the adjustment and calibration of the welding angles of two sets of welding guns through the linkage combination of the moving component and the angle adjustment component, so that the welding guns can cope with the welding assembly work of distribution boxes of different sizes, and the welding adaptability is more diversified and the flexible use is better.

[0024] (3) The distribution box assembly welding device sets the angle adjustment component on the moving path of the welding gun. The angle adjustment component adjusts the welding angle of the welding gun. The movable component can be used as a power source to drive the welding gun to self-adjust to the required welding angle without the need for external force. Its self-adjustment is more convenient and efficient.

[0025] (4) The distribution box assembly welding device can realize double welding of the distribution box's angle welds and double welding of the distribution box's horizontal welds by utilizing the reverse adjustment and calibration of two sets of welding guns. The welding of the distribution box's assembly welds is realized by using a double welding travel path. The variable displacement required for welding is smaller, the welding time is shorter, and the welding quality and welding efficiency can be greatly improved.

[0026] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a structural schematic diagram of the present invention;

[0028] Figure 2 Schematic diagram of the assembly of the welding gun and the housing in the present invention;

[0029] Figure 3 Schematic diagram of the assembly of the welding gun and the housing of the present invention (back view);

[0030] Figure 4 Schematic diagram of the assembly of the mobile component, welding gun and housing in the present invention;

[0031] Figure 5 It is a first structural schematic diagram of the movable assembly and the welding gun in the present invention;

[0032] Figure 6 A second structural diagram of the movable assembly and the welding gun in the present invention;

[0033] Figure 7 Schematic diagram of the assembly of the angle adjustment component, welding gun and housing in the present invention;

[0034] Figure 8 This is a first structural diagram of the angle adjustment assembly in the present invention;

[0035] Figure 9 This is a second structural schematic diagram of the angle adjustment assembly in the present invention;

[0036] Figure 10 Schematic diagram of the assembly of the welding gun and the rotating shaft in the present invention;

[0037] Figure 11 This is a schematic diagram of the structure of the welding gun and the rotating shaft being self-locked once in the present invention;

[0038] Figure 12 This is a schematic diagram of the structure of the secondary self-locking of the welding gun and the rotating shaft in the present invention;

[0039] Figure 13 This is a first structural schematic diagram of the welding alignment assembly in the present invention;

[0040] Figure 14 This is a second structural schematic diagram of the welding alignment assembly in the present invention;

[0041] Figure 15 Schematic diagram of the structure of the welding table assembly in the present invention;

[0042] Figure 16 Schematic diagram of welding of the corner weld of the distribution box in the present invention;

[0043] Figure 17 It is a welding schematic diagram of the horizontal weld of the distribution box in the present invention.

[0044] In the figure, 1, central axis; 2, housing; 3, rotating seat; 4, welding gun; 5, tooling die; 6, support slide; 7, track frame; 8, screw lift; 9, first motor; 10, second motor; 11, first guide rail; 12, first slide; 13, support platform; 14, second guide rail; 15, second slide; 16, alignment rack; 17, transmission gear; 18, transfer gear; 19, brake gear; 20, fixed seat; 21, drive gear; 22, drive gear row; 221, pressure slide ; 23. Locking slide rail; 24. Adjusting gear; 25. Adjusting rack; 26. Adjusting push plate; 261. Inclined surface; 27. Reset structure; 271. Support plate; 272. Arm force guide rod; 273. Reset spring; 28. Rotating shaft; 29. ​​Transmission worm gear; 30. Driving shaft; 31. Transmission worm; 32. Locking block; 33. Locking slide groove; 34. Side support seat; 35. Suspension support seat; 36. Third motor; 37. Moving gear; 38. Fixed gear; 39. Track screw; 40. Fourth motor. DETAILED DESCRIPTION

[0045] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0046] In the description of the present invention, it should be understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inside", "around" and the like indicating orientation or positional relationship are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0047] See also Figures 1-17 , an embodiment of the present invention provides a technical solution: a distribution box assembly welding device and an assembly welding method thereof.

[0048] In one aspect, the present invention provides a distribution box assembly welding device.

[0049] See also Figure 1 、 Figure 13 、 Figure 16-17 The distribution box assembly welding device includes a central axis 1, a housing 2 arranged on the central axis 1 and rotating through a side support seat 34, two sets of welding guns 4 arranged on the housing 2 axially symmetrically with respect to the central axis 1, a moving component arranged in the housing 2, the moving component is used to drive the two sets of welding guns 4 to move synchronously in opposite directions, and an angle adjustment component arranged on the moving path of the welding gun 4. The angle adjustment component uses the movement of the welding gun 4 as a driving force to change the angle of the welding gun 4. When welding the distribution box, based on the braking of the moving component, the two sets of welding guns 4 are driven to move synchronously in opposite directions along the housing 2 and move closer to the diagonal weld of the distribution box (the diagonal weld of the distribution box is preferably welded, because the diagonal weld of the distribution box forms an "X" shape structure, the diagonal welds between the diagonal welds are preferably welded). The spacing is the same, and the two sets of welding guns 4 only need to adjust the angle and displacement once to realize the double welding process of the distribution box's angle welds. In addition, in this welding process, the distribution box does not need to be moved, which can save the welding braking path and reduce the welding deviation caused by the movement. Furthermore, for welding the horizontal welds of the distribution box, in this welding process, the distribution box only needs to move horizontally to realize the welding work of the horizontal welds of the distribution box welds, maximizing the reduction of welding deviations caused by displacement. While moving in the opposite direction, the angle adjustment component uses the braking force of the moving component as the power source to drive the two sets of welding guns 4 to self-adjust the required welding angle. Without the help of external force, the welding angle can be self-adjusted as the two sets of welding guns 4 move, so as to flexibly adapt to the welding angle requirements of the distribution box welds.

[0050] See also Figure 2-Figure 6 In order to realize the synchronous reverse movement of the two groups of welding guns 4, the moving assembly includes a transmission gear 17 provided at the center of the housing 2. The upper and lower ends of the transmission gear 17 are staggeredly meshed with two groups of alignment racks 16. One end of the two groups of alignment racks 16 is respectively provided with a support platform 13 supporting the rotating shaft 28, and a second motor 10 driving the transmission gear 17 is provided in the middle of the back plate of the housing 2. When driving the two groups of welding guns 4 to move in the opposite direction, the second motor 10 drives the brake gear 19 at its output end to rotate, and the brake gear 19 is used to rotate with the intermediate gear on one side of the transmission gear 17. The meshing transmission of 18 drives the transmission gear 17 to rotate, and generates an upper and lower staggered meshing thrust with the two sets of calibration racks 16, pushing the two sets of support platforms 13 to move in the opposite direction synchronously, and then pushing the two sets of welding guns 4 fixed on the rotating shaft 28 through the rotating seat 3 to move in the opposite direction synchronously, approaching the opposite welds of the distribution box, and while pushing the two sets of welding guns 4 to move in the opposite direction, the reverse thrust can also be used as a braking thrust of the rotating shaft 28, pushing the rotating shaft 28 to generate rotational drive relative to the angle adjustment component, and promoting the self-adjustment and calibration of the welding angles of the two sets of welding guns 4.

[0051] It should be noted that the moving component also includes a first guide rail 11 provided on the casing 2, a first slide 12 provided on the first guide rail 11 for fixing the support platform 13, a second guide rail 14 provided on one side of the support platform 13, and a second slide 15 provided on the calibration rack 16 along the second guide rail 14. When the two groups of support platforms 13 move in opposite directions, the track combination of the first guide rail 11 and the first slide 12 provides a primary support and guidance for the two groups of support platforms 13, and the track combination of the second guide rail 14 and the second slide 15 provides a secondary support and guidance for the two groups of support platforms 13. In addition, the track combination of the second guide rail 14 and the second slide 15 can also serve as a guide and limiter for the meshing transmission between the calibration rack 16 and the transmission gear 17, so that the meshing transmission of the calibration rack 16 along the transmission gear 17 is smoother.

[0052] See also Figure 7-11In order to adjust the welding angles of the two groups of welding guns 4, the angle adjustment assembly includes a fixed base 20 assembled on the end of the rotating shaft 28 away from the welding gun 4. The fixed base 20 is provided with a driving gear 21 and a driving gear row 22 provided on the moving path of the welding gun 4 and meshing with the driving gear 21. The driving gear row 22 is split along the moving path of the welding gun 4, and each driving gear row 22 can selectively mesh with the driving gear 21. Since the welding gun 4 is fixed to the rotating shaft 28 through the rotating base 3, at this time, by controlling the forward push amount of the driving gear row 22, when the welding gun 4 initially moves, the driving gear 21 is pushed to maintain meshing transmission with the forward pushed driving gear row 22, forming a meshing state of a specified length, generating torque transmission under rated state, and transmitting the torque force to the driving shaft 30 through the driving gear 21, and causing the driving shaft 30 to push the rotating shaft 28 to rotate quantitatively, so that the welding gun 4 rotates to the specified welding angle.

[0053] As a further solution of this embodiment, the angle adjustment assembly also includes an adjusting gear 24 provided at the midline position between the two rows of driving gears 22, and the upper and lower ends of the adjusting gear 24 are staggeredly meshed with two sets of adjusting racks 25, and two sets of adjusting push plates 26 staggered on the two sets of adjusting racks 25, and slide into the upper and lower ends of the two rows of driving gears 22 respectively, and a pressure-bearing slide 221 adapted to the adjusting push plate 26 is provided on the driving gear 22, and one end of the adjusting push plate 26 is provided with an inclined surface 261 that slides into the pressure-bearing slide 221. When the driving gear 22 is pushed forward, at this time, the first motor 9 provided on the back plate of the casing 2 is operated to drive the adjusting gear 24 to rotate. , the meshing transmission between the adjusting gear 24 and the two sets of adjusting racks 25 is used to generate an interlaced thrust, pushing the two sets of adjusting push plates 26 toward the two rows of driving gear rows 22, and at the same time, the inclined surfaces 261 thereof are pressed against the pressure-bearing slide grooves 221 of the driving gear rows 22, and under continuous thrust, the inclined surfaces 261 are gradually pushed forward into the pressure-bearing slide grooves 221 until the adjusting push plates 26 slide into the pressure-bearing slide grooves 221, pushing the driving gear rows 22 forward and fixing them, and then in this way, by controlling the extension length of the adjusting push plates 26, sliding into a specified number of driving gear rows 22, pushing the specified number of driving gear rows 22 forward, and generating a specified length of meshing transmission with the driving gear 21.

[0054] In addition, the back plate of the driving gear row 22 is provided with a support plate 271 fixedly arranged on the housing 2, and an arm force guide rod 272 supporting the driving gear row 22 is provided through the support plate 271. The arm force guide rod 272 is provided with a return spring 273 for pushing the driving gear row 22 forward and then returning it to its original position. Through the return structure 27 composed of the support plate 271, the arm force guide rod 272, and the return spring 273, after the push plate 26 is subsequently adjusted to slide out of the driving gear row 22, its arm force guide rod 272 drives the driving gear row 22 to reset itself under the elastic force of the return spring 273.

[0055] See also Figure 10-12In order to achieve self-locking fixation of the two groups of welding guns 4 after the welding angles are adjusted, the self-locking fixation includes a transmission worm gear 29 installed on the rotating shaft 28 and a transmission worm 31 installed on the fixed seat 20 along the moving direction of the welding gun 4. The transmission worm gear 29 meshes with the transmission worm 31, and the transmission worm 31 is coaxial with the driving gear 21, so that the rotating shaft 28 is self-locked once. By utilizing the meshing transmission of the transmission worm 31 and the transmission worm gear 29, on the one hand, a transmission source is formed to transmit the rotational force of the driving gear 21 to the driving shaft 30, which is transmitted to the rotating shaft 28 through the meshing transmission of the transmission worm 31 and the transmission worm gear 29 to drive the adjustment of the welding angle of the welding gun 4. On the other hand, a self-locking state is formed, and the unique self-locking function of the worm gear is utilized to make the rotating shaft 28 have a self-locking function, so that the angle of the welding gun 4 after adjustment is self-locked and fixed, so as to improve the stability of the displacement welding of the welding gun 4.

[0056] The locking block 32 is a regular polygonal structure, and the number of positive sides of the locking block 32 is an even number. Since the meshing transmission between the driving gear 21 and each driving gear row 22 is a rated transmission, the meshing thrust is converted into the rotational force on the rotating shaft 28 as the rated thrust, which drives the rotating shaft 28 to rotate quantitatively. The rotating shaft 28 rotates a quantitative angle in a single rotation. At this time, the positive side inner angle of the locking block 32 is set to the same value as the single rotation angle of the rotating shaft 28 (for example, the rotating shaft 28 rotates 30 degrees in a single rotation, and the locking block 32 is set to a regular dodecagonal structure, each of which has a positive side inner angle of 30 degrees, and each time it rotates with the The rotating shaft 28 rotates synchronously with one positive side), so that the positive side of the locking block 32 rotates synchronously with the rotating shaft 28 by the same angle, and by setting the positive side of the locking block 32 to an even number, the locking block 32 can always keep the positive sides aligned up and down after rotating synchronously with the rotating shaft 28 (by setting the positive side of the locking block 32 to an even number, its two positive sides with the center relative to each other always remain in a horizontal state, and then after each positive side rotation, its positive sides can always remain in a horizontal state up and down), so that after the rotating shaft 28 drives the welding gun 4 to adjust the angle, the locking block 32 will smoothly enter the locking slide groove 33 when it subsequently contacts the locking slide rail 23, and the locking slide rail 23 is used to limit the sliding of the locking block 32, and the rotating shaft 28 is locked and limited, so that the adjusted angle of the welding gun 4 is self-locked and fixed for a second time, further improving the stability of the welding gun 4 during the welding displacement process.

[0057] See also Figure 13-14In order to realize the variable displacement when the two groups of welding guns 4 weld the distribution box weld seam, a welding calibration assembly for driving the welding guns 4 to rotate and lift is provided at one axial end of the central shaft 1. The welding calibration assembly is used to drive the two groups of welding guns 4 to rotate until the opposite weld seams of the distribution box are flush. The welding calibration assembly includes a fixed gear 38 fixed on the central shaft 1, and a movable gear 37 is meshed on one side of the fixed gear 38. A third motor 36 supporting the movable gear 37 is provided on the side support seat 34. After the welding orientation and welding angle of the two groups of welding guns 4 are self-adjusted and calibrated, the third motor 36 is controlled to work, driving the movable gear 37 to rotate, so that the movable gear 37 is meshed and transmitted along the circumferential direction of the fixed gear 38, driving the two groups of welding guns 4 on the casing 2 to rotate with the central shaft 1 as the center until the weld seam of the distribution box is flush (because the welding guns 4 are preferred for welding the opposite angle weld of the distribution box, at this time, the two groups of welding guns 4 first move along the fixed gear 38). The center axis 1 rotates circumferentially to one group of angle welds of the distribution box. After one group of angle welds is welded, the welding azimuth angle of the welding gun 4 does not need to be adjusted, and it can be rotated again to the other group of angle welds for welding to reduce the welding deviation caused by large displacement during the welding process. Then, the two groups of welding guns 4 are reset and zeroed close to the center axis 1, so that the welding guns 4 are zeroed and calibrated after each single welding to ensure the accuracy of each welding displacement braking. Then, the two groups of welding guns 4 are displaced in the opposite direction and the welding angle is adjusted. After alignment with the horizontal weld of the distribution box, the two groups of welding guns 4 are driven to rotate circumferentially along the center axis 1 to the horizontal weld of the distribution box. After welding the horizontal weld, the overall welding of the distribution box can be completed, reducing the large welding movement stroke during traditional welding) so that the two groups of welding guns 4 are aligned with the welds opposite to the distribution box to perform a double welding process.

[0058] As a further solution of this embodiment, the welding positioning assembly is also used to control the lifting and displacement of two groups of welding guns 4 to perform double welding on the welds. The welding positioning assembly also includes a screw elevator 8 provided at one axial end of the central axis 1. The screw elevator 8 is fixedly connected to the central axis 1 through a suspension bracket 35. The screw lifting characteristics of the screw elevator 8 are utilized to drive the two groups of welding guns 4 to lift and displace to the opposite welds of the distribution box for double welding (when welding the angle welds of the distribution box, the two groups of welding guns 4 are controlled to lift and displace along the angle welds of the distribution box to perform double welding on the welds, and when welding the horizontal welds of the distribution box, the two groups of welding guns 4 are controlled to move down close to the horizontal welds and wait for the distribution box to self-translate for welding).

[0059] See also Figure 15In order to realize the variable displacement when the distribution box is welding the horizontal weld, a welding table assembly is provided at the other axial end of the central axis 1 to support the distribution box and drive the displacement of the distribution box, which is used to drive the distribution box to translate relative to the welding gun 4 for double welding. The welding table assembly includes a track frame 7, which is provided at the other axial end of the central axis 1. A supporting slide 6 is provided on the track frame 7, and a tooling mold 5 is provided on the supporting slide 6. After the two groups of welding guns 4 are moved close to the horizontal weld of the distribution box, the fourth motor 40 provided at one end of the track frame 7 drives the rotation of the track screw 39 at its output end to convert the rotary thrust into a desired rotation. It is transformed into a horizontal thrust, pushing the supporting slide 6 to translate along the track frame 7, and then pushing the tooling mold 5 to move, so that the distribution box in the tooling mold 5 is translated along the welding gun 4 for double welding (because the distribution box in the tooling mold 5 always remains stationary before the horizontal weld is welded, the center of the distribution box is always facing the central axis 1. At this time, the two sets of welding guns 4 are facing the center of the horizontal weld of the distribution box. Then, by moving the distribution box back and forth along the welding gun 4, the double welding of the horizontal weld of the distribution box can be completed, which minimizes the welding size deviation caused by the frequent displacement of the distribution box).

[0060] On the other hand, the present invention also provides an assembly welding method of a distribution box assembly welding device, comprising the following steps:

[0061] Step 1: The distribution box is mounted on the tooling mold 5, and the center of the distribution box is aligned with the central axis 1;

[0062] Step 2: The two sets of welding guns 4 move synchronously in opposite directions, moving toward the angle weld of the distribution box, and at the beginning of the movement, using the movement as the driving force, drive the two sets of welding guns 4 to open the required welding angle of the angle weld in opposite directions;

[0063] Step 3: The two sets of welding guns 4 are lifted and braked to realize double welding of the corner welds of the distribution box, and after the welding of one set of corner welds is completed, they are rotated to the other set of corner welds for double welding again;

[0064] Step 4: The two welding guns 4 are moved closer to the central axis 1 to reset and calibrate to zero. Then, in the same manner as step 2, the two welding guns 4 are driven to move to the horizontal weld of the distribution box and the welding angle required for the horizontal weld is opened in the opposite direction.

[0065] Step 5: The two sets of welding guns 4 are lifted and braked close to the horizontal weld. At this time, the tooling mold 5 pushes the distribution box to move horizontally to achieve double welding of the horizontal weld of the distribution box.

Claims

1. A distribution box assembly welding device, characterized in that: include: Central axis (1); A housing (2), the housing (2) being arranged on the central axis (1) via a side support seat (34); Welding guns (4), the welding guns (4) are provided in two groups, and the two groups of welding guns (4) are provided on the housing (2) in an axially symmetrical manner relative to the central axis (1); A moving assembly, the moving assembly being arranged in the housing (2), and being used to drive two groups of welding guns (4) to move synchronously in opposite directions; An angle adjustment component, the angle adjustment component is located on the moving path of the welding gun (4), the angle adjustment component uses the movement of the welding gun (4) as a driving force to change the angle of the welding gun (4), and the angle adjustment component can open the welding gun (4) to a desired angle; It also includes a rotating shaft (28), which is arranged on the welding gun (4), and the rotating shaft (28) rotates to control the angle of the welding gun (4); The angle adjustment component includes: A fixed seat (20), the fixed seat (20) being assembled on an end of the rotating shaft (28) away from the welding gun (4); A driving gear (21), the driving gear (21) is located on the fixed seat (20) and is used to drive the rotating shaft (28) to rotate; A drive gear row (22), the drive gear row (22) is located on the moving path of the welding gun (4) and is engaged with the drive gear (21); The drive gear rows (22) are arranged in a split manner along the moving path of the welding gun (4), and each drive gear row (22) can selectively mesh with the drive gear (21); The distribution box assembly welding device also includes: An adjusting gear (24), the adjusting gear (24) being arranged at the midline position of the interval between the two rows of driving gears (22), and two sets of adjusting racks (25) being staggeredly meshed at the upper and lower ends of the adjusting gear (24); The adjusting push plates (26) are arranged in two groups. The two groups of adjusting push plates (26) are staggered on the two groups of adjusting racks (25) and slide into the upper and lower ends of the two rows of driving gears (22) respectively.

2. A distribution box assembly welding device according to claim 1, characterized in that: The driving gear row (22) is provided with a pressure-bearing chute (221) adapted to the adjusting push plate (26), and one end of the adjusting push plate (26) is provided with an inclined surface (261) that slides into the pressure-bearing chute (221), so that after the inclined surface (261) is pressed into the pressure-bearing chute (221), the inclined surface (261) gradually pushes the pressure-bearing chute (221) forward until the adjusting push plate (26) slides into and pushes the fixed driving gear row (22).

3. A distribution box assembly welding device according to claim 2, characterized in that: The back plate of the driving gear row (22) is provided with a support plate (271), an arm force guide rod (272) supporting the driving gear row (22) is provided through the support plate (271), and a return spring (273) is provided on the arm force guide rod (272) for pushing the driving gear row (22) forward and then returning it to its original position.

4. A distribution box assembly welding device according to any one of claims 1 to 3, characterized in that: Also includes: A transmission worm wheel (29) is mounted on the rotating shaft (28) and a transmission worm (31) is mounted on the fixed seat (20) along the moving direction of the welding gun (4). The transmission worm wheel (29) is meshed with the transmission worm (31). The transmission worm (31) is coaxial with the driving gear (21), so that the rotating shaft (28) forms a primary self-locking.

5. A distribution box assembly welding device according to claim 4, characterized in that : It also includes a locking block (32) provided at the other end of the rotating shaft (28) and a locking slide rail (23) provided on the displacement track of the locking block (32) by the staggered drive gear row (22), and the locking slide rail (23) is provided with a locking slide groove (33) opposite to the locking block (32) along the guide rail direction thereof; The locking block (32) is a regular polygonal structure, and the number of positive sides of the locking block (32) is an even number. When the meshing force between the drive gear (21) and the drive gear row (22) is converted into a rated rotational force to drive the rotating shaft (28) to rotate quantitatively, the positive side of the locking block (32) rotates synchronously with the rotating shaft (28) quantitatively, and always keeps the positive side aligned up and down and slides into the locking slide groove (33), forming a secondary self-locking.

6. The distribution box assembly welding device according to claim 5, characterized in that: A welding calibration assembly for driving the welding gun (4) to rotate and lift is provided at one axial end of the central shaft (1), and is used to drive the two sets of welding guns (4) to rotate until the welding seams of the distribution box are flush with each other, and to control the lifting and lowering displacement of the two sets of welding guns (4) to perform double welding on the welds, wherein: Welding alignment kit includes: A screw elevator (8), the screw elevator (8) is arranged at one axial end of the central shaft (1), the screw elevator (8) is fixedly connected to the central shaft (1) through a suspension support (35), and the screw of the screw elevator (8) is telescopically driven to lift and displace the welding gun (4) to the welding seam of the distribution box; A fixed gear (38) is fixedly mounted on the central shaft (1), and a movable gear (37) is meshed on one side of the fixed gear (38), so that the movable gear (37) is meshed and driven along the circumferential direction of the fixed gear (38), driving the two sets of welding guns (4) to rotate around the central shaft (1) until the welding seams of the distribution box are flush.

7. A distribution box assembly welding device according to claim 6, characterized in that: The other axial end of the central shaft (1) is provided with a welding table assembly that supports the distribution box and drives the distribution box to move, and is used to drive the distribution box to translate relative to the welding gun (4) for double welding, wherein: The welding table assembly includes a track frame (7), the track frame (7) is arranged at the other axial end of the central axis (1), the track frame (7) is provided with a support slide (6), and the support slide (6) is provided with a tooling mold (5), so that the support slide (6) pushes the tooling mold (5) to move, driving the distribution box in the tooling mold (5) to translate along the welding gun (4) for welding.

8. A distribution box assembly welding method, applicable to the distribution box assembly welding device according to claim 7, characterized in that: The steps include: Step 1: The distribution box is mounted on the tooling mold (5), and the center of the distribution box is aligned with the center axis (1); Step 2: The two sets of welding guns (4) move synchronously in opposite directions, moving toward the angle weld of the distribution box, and at the beginning of the movement, using the movement as a driving force, driving the two sets of welding guns (4) in opposite directions to open the angle weld required; Step 3: The two sets of welding guns (4) are lifted and braked to realize double welding of the corner welds of the distribution box, and after the welding of one set of corner welds is completed, they are rotated to the other set of corner welds for double welding again; Step 4: The two sets of welding guns (4) are brought close to the central axis (1) to reset and calibrate to zero, and then, in the same manner as in step 2, the two sets of welding guns (4) are driven to move to the horizontal weld of the distribution box and reversely open the welding angle required for the horizontal weld; Step 5: The two sets of welding guns (4) are lifted and braked to approach the horizontal weld seam. At this time, the tooling mold (5) pushes the distribution box to move horizontally, thereby achieving double welding of the horizontal weld seam of the distribution box.

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