Welding Fixture for Common-Box Ring Main Unit and Its Welding Method

Abstract

The present invention provides a welding jig for a coaxial ring main unit and a welding method thereof. The welding jig includes a base, on the upper side of which there are provided two mounting plates and two X-axis motors with opposite mounting directions. The distance between the mounting plates is adjusted by the X-axis motors to meet the requirements of different coaxial numbers for the width of the jig. A positioning assembly is provided on the upper side of the mounting plate. The second carrier plate is fixedly connected to the upper side of the mounting plate. The fourth carrier plate is located outside the second carrier plate, and the sixth carrier plate is located in front of the second carrier plate. The seventh carrier plate is fixedly connected to the upper side of the sixth carrier plate. The second carrier plate is provided with a first Y-axis motor and a second Y-axis motor with opposite mounting directions. The first Y-axis motor is used to drive the sixth carrier plate to move, and the second Y-axis motor is used to drive the fourth carrier plate to move, so that the positioning assembly can meet the requirements of different coaxial heights. Coaxial ring main units of different specifications can reuse the same welding jig, which is beneficial to controlling production costs and improving welding efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of power equipment manufacturing, and particularly relates to a welding jig for a coaxial ring main unit and a welding method thereof. Background Art

[0002] A coaxial ring main unit can have multiple boxes arranged within one ring main unit, and a circuit breaker is installed inside each box. The coaxial ring main unit is composed of multiple cabinet panels spliced together. During the production process, the front panel, top panel, bottom panel, L-shaped lower front panel, and two side panels need to be welded together first. After the installer enters the cabinet from the rear side to install the circuit breaker, the rear panel is then installed on the rear side to obtain a complete coaxial ring main unit. Therefore, improving the welding efficiency of each cabinet panel before installing the circuit breaker has an important impact on the production efficiency of the coaxial ring main unit.

[0003] Since each cabinet panel is an independent plate, in the traditional method, one worker needs to manually fix the cabinet panel to be welded, and another worker performs the welding. The stability of manually fixing the cabinet panel cannot be guaranteed. Since through holes are reserved for electrical connection on the front panel, top panel, bottom panel, side panel, and lower front panel, some welding jigs have been proposed in the related art, which can set core-pulling shafts at positions corresponding to the through holes. When the installation position of the cabinet panel is accurate, the core-pulling shafts can extend out from the through holes, which not only realizes the positioning of the cabinet panel but also inhibits the movement of the cabinet panel during the welding process, thereby maintaining the splicing stability of each part during the welding process and improving the welding quality.

[0004] However, the number of boxes and the height of the boxes inside different models of ring main units may be different. The sizes and the positions of the core-pulling shafts of the existing welding jigs are fixed. Therefore, each welding jig can only be applicable to one model of ring main unit. To produce multiple models of ring main units, multiple welding jigs need to be configured, resulting in a high production cost and poor reusability of the welding jigs. Summary of the Invention

[0005] The present invention aims to at least solve one of the technical problems existing in the prior art. For this purpose, the present invention provides a welding jig for a coaxial ring main unit and a welding method thereof, enabling the welding jig to move in the X-axis direction to meet different numbers of coaxial units, and flexibly adjusting the positions of multiple core-pulling shafts through the movement of multiple carrier plates in the Y-axis direction, so that the welding jig can be adapted to multiple ring main units, reducing the production cost and improving the reusability of the welding jig.

[0006] In a first aspect, an embodiment of the present invention provides a welding jig for a coaxial ring main unit. The front panel of the ring main unit is provided with a first through hole, the lower front panel is provided with a second through hole, the bottom panel is provided with a third through hole, and the side panel is provided with a fourth through hole. The welding jig is characterized in that it includes:

[0007] Base, two mounting plates and two X-axis motors with opposite mounting directions are arranged on the upper side of the base, each of the mounting plates is connected to one of the X-axis motors, and positioning components are respectively arranged on the upper sides of the two mounting plates;

[0008] The positioning component includes a second carrier plate, a fourth carrier plate, a sixth carrier plate and a seventh carrier plate. The second carrier plate is fixedly connected to the upper side of the mounting plate. The fourth carrier plate is located outside the second carrier plate. The sixth carrier plate is located in front of the second carrier plate. The seventh carrier plate is fixedly connected to the upper side of the sixth carrier plate. The second carrier plate is provided with a first Y-axis motor and a second Y-axis motor with opposite mounting directions. The first Y-axis motor is used to drive the sixth carrier plate to move, and the second Y-axis motor is used to drive the fourth carrier plate to move;

[0009] Wherein, a first core-pulling shaft matching the fourth through hole is installed outside the fourth carrier plate, a second core-pulling shaft matching the first through hole is installed on the upper side of the seventh carrier plate, a fourth core-pulling shaft matching the second through hole is installed on the upper side of the sixth carrier plate, and a third core-pulling shaft matching the third through hole is installed in front of the sixth carrier plate.

[0010] According to some embodiments of the present invention, at least one fourth touch switch and at least one fourth suction cup are further arranged on the front side of the sixth carrier plate, a fifth touch switch is arranged on the upper side of the sixth carrier plate, a plurality of first touch switches and a plurality of first suction cups are arranged outside the fourth carrier plate, a third touch switch and a third suction cup are arranged on the upper side of the seventh carrier plate and / or the upper side of the fourth carrier plate, and the upper side of the fourth carrier plate is flush with the upper side of the seventh carrier plate;

[0011] It further includes a third carrier plate. The third carrier plate is connected to the second Y-axis motor. The fourth carrier plate is fixedly connected to the third carrier plate. The third carrier plate is located behind the second carrier plate. At least one second touch switch and at least one second suction cup are arranged on the rear side of the third carrier plate.

[0012] According to some embodiments of the present invention, the mounting plate is provided with a third Y-axis motor, the mounting direction of the third Y-axis motor is the same as that of the first Y-axis motor, the second carrier plate is further provided with a fourth Y-axis motor, the mounting direction of the fourth Y-axis motor is the same as that of the second Y-axis motor, and the positioning component further includes:

[0013] A first carrier plate. The first carrier plate is located in front of the sixth carrier plate. The third Y-axis motor is used to drive the first carrier plate to move. A pressing arm is installed on the first carrier plate. The pressing arm can rotate in the front-rear direction. When the pressing arm is in the downward pressing state, the pressing arm abuts against the lower front plate.

[0014] The fifth carrier plate is located at the rear side of the third carrier plate. The fourth Y-axis motor is used to drive the fifth carrier plate to move. The fifth carrier plate is provided with a flipping motor and a telescopic arm. The flipping motor is used to drive the telescopic arm to rotate in the front-rear direction, and the telescopic arm can be pressed against the upper side of the front plate.

[0015] According to some embodiments of the present invention, the flipping motor is connected to a fifth Y-axis motor, and the fifth Y-axis motor is used to drive the telescopic arm to extend and retract. A plurality of elastic columns are provided on the lower side of the telescopic arm. A fifth through hole is provided at the end of the telescopic arm away from the fifth carrier plate. A positioning stud is provided at the end of the pressing arm away from the first carrier plate. When the pressing arm is in the downward pressing state and the telescopic arm is in the state of being extended to the longest, the positioning stud is inserted into the fifth through hole.

[0016] In a second aspect, an embodiment of the present invention provides a welding method for a co-box type ring main unit, which is applied to the host computer of a welding system. The welding system further includes a welding arm and the welding jig for the co-box type ring main unit described in the first aspect. The host computer is communicatively connected to the welding arm and the welding jig. The welding method includes:

[0017] Obtaining the number of co-boxes and the target model of the target circuit breaker based on the configuration interface;

[0018] Determining a first distance based on a preset unit box width and the number of co-boxes, generating a first movement instruction based on half of the first distance, and sending the first movement instruction to two X-axis motors respectively, where the unit box width is used to indicate the box width required for a single circuit breaker;

[0019] Determining the box height and the side plate positioning distance based on the target model, generating a second movement instruction based on the side plate positioning distance, generating a third movement instruction based on the box height, sending the second movement instruction to the second Y-axis motor, and sending the third movement instruction to the first Y-axis motor, where the side plate positioning distance is used to indicate the Y-axis distance between the fourth through hole of the side plate and the second Y-axis motor;

[0020] Fixing the side plate to the side of the welding jig based on the first core-pulling shaft and the fourth through hole, fixing the front plate to the upper side of the welding jig based on the second core-pulling shaft and the first through hole, fixing the bottom plate to the front side of the welding jig based on the third core-pulling shaft and the third through hole, and fixing the lower front plate between the front plate and the bottom plate based on the fourth core-pulling shaft and the second through hole;

[0021] Controlling the welding arm to weld the side plate and the lower front plate in sequence.

[0022] According to some embodiments of the present invention, generating a first movement instruction based on half of the first distance includes:

[0023] Obtain a preset first reference distance, where the first reference distance is used to indicate the minimum distance between the X-axis motor and the fourth carrier board;

[0024] Obtain the extension length of the X-axis motor, where the extension length is used to indicate the distance that the mounting plate has moved in a direction away from the X-axis motor;

[0025] Subtract the first reference distance and the extension length from half of the value of the first distance in sequence to obtain a first movement distance, and generate the first movement instruction based on the first movement distance.

[0026] According to some embodiments of the present invention, determining the box height and the side plate positioning distance based on the target model, generating a second movement instruction based on the side plate positioning distance, and generating a third movement instruction based on the box height includes:

[0027] Obtain a preset second reference distance, third reference distance, and fourth reference distance, where the second reference distance is used to indicate the minimum Y-axis distance between the second Y-axis motor and the first core-pulling shaft, the third reference distance is used to indicate the minimum Y-axis distance between the first Y-axis motor and the third core-pulling shaft, and the fourth reference distance is used to indicate the Y-axis distance between the first Y-axis motor and the second Y-axis motor;

[0028] Obtain a preset mapping table, and obtain the box height, the side plate positioning distance, and the through-hole reference distance from the preset mapping table based on the target model, where the through-hole reference distance is used to indicate the distance between the fourth through-hole and the rear end of the side plate, and the preset mapping table records the distance information corresponding to the circuit breaker model;

[0029] Determine the difference between the side plate positioning distance and the second reference distance as the second movement distance, and generate the second movement instruction based on the second movement distance;

[0030] Subtract the second movement distance, the third reference distance, the fourth reference distance, and the through-hole reference distance from the box height in sequence to obtain a third movement distance, and generate the third movement instruction based on the third movement distance.

[0031] According to some embodiments of the present invention, the ring main unit further includes a rear plate. At least one fourth touch switch and at least one fourth suction cup are further provided on the front side of the sixth carrier plate. A fifth touch switch is provided on the upper side of the sixth carrier plate. A plurality of first touch switches and a plurality of first suction cups are provided on the outer side of the fourth carrier plate. A third touch switch and a third suction cup are provided on the upper side of the seventh carrier plate and / or on the upper side of the fourth carrier plate. The upper side of the fourth carrier plate is flush with the upper side of the seventh carrier plate. It further includes a third carrier plate, the third carrier plate is connected to the second Y-axis motor, the fourth carrier plate is fixedly connected to the third carrier plate, the third carrier plate is located at the rear side of the second carrier plate, and at least one second touch switch and at least one second suction cup are provided on the rear side of the third carrier plate;

[0032] Fix the side plate to the side of the welding jig based on the first core-pulling shaft and the fourth through hole, fix the front plate to the upper side of the welding jig based on the second core-pulling shaft and the first through hole, fix the bottom plate to the front side of the welding jig based on the third core-pulling shaft and the third through hole, and fix the lower front plate between the front plate and the bottom plate based on the fourth core-pulling shaft and the second through hole, including:

[0033] When the trigger signal of the first touch switch is detected, control the first core-pulling shaft to switch to the extended state, and start the first suction cup to suck the side plate tightly to the outer side of the fourth carrier plate;

[0034] When the trigger signal of the second touch switch is detected, start the second suction cup to suck the rear plate tightly to the rear side of the third carrier plate;

[0035] When the trigger signal of the third touch switch is detected, control the second core-pulling shaft to switch to the extended state, and start the third suction cup to suck the front plate tightly to the upper sides of the seventh carrier plate and the fourth carrier plate;

[0036] When the trigger signal of the fourth touch switch is detected, control the third core-pulling shaft to switch to the extended state, and start the fourth suction cup to suck the bottom plate tightly to the front side of the sixth carrier plate;

[0037] When the trigger signal of the fifth touch switch is detected, control the fourth core-pulling shaft to switch to the extended state.

[0038] According to some embodiments of the present invention, the mounting plate is provided with a third Y-axis motor, the mounting direction of the third Y-axis motor is the same as that of the first Y-axis motor, the second carrier plate is further provided with a fourth Y-axis motor, the mounting direction of the fourth Y-axis motor is the same as that of the second Y-axis motor, the positioning assembly further includes a first carrier plate, the first carrier plate is located in front of the sixth carrier plate, the third Y-axis motor is used to drive the first carrier plate to move, the first carrier plate is equipped with a pressing arm, the pressing arm can rotate in the front-rear direction, when the pressing arm is in the downward pressing state, the pressing arm abuts against the lower front plate; a fifth carrier plate, the fifth carrier plate is located behind the third carrier plate, the fourth Y-axis motor is used to drive the fifth carrier plate to move, the fifth carrier plate is provided with a flipping motor and a telescopic arm, the flipping motor is used to drive the telescopic arm to rotate in the front-rear direction, the telescopic arm can be pressed against the upper side of the front plate; the flipping motor is connected to a fifth Y-axis motor, the fifth Y-axis motor is used to drive the telescopic arm to extend and retract, a plurality of elastic columns are arranged on the lower side of the telescopic arm, a fifth through hole is arranged at the end of the telescopic arm away from the fifth carrier plate, and a positioning stud is arranged at the end of the pressing arm away from the first carrier plate. When the pressing arm is in the downward pressing state and the telescopic arm is in the state of being extended to the longest, the positioning stud is inserted into the fifth through hole;

[0039] Before controlling the welding arm to weld the side plate and the lower front plate in sequence, the method further includes:

[0040] Obtain a fifth reference distance and a sixth reference distance based on the preset mapping table, and obtain a preset seventh reference distance, wherein the fifth reference distance is used to indicate the Y-axis distance between the fourth Y-axis motor and the second Y-axis motor, and the sixth reference distance is used to indicate the Y-axis distance between the first Y-axis motor and the third Y-axis motor;

[0041] Obtain a fourth moving distance by subtracting the fifth reference distance from the side plate positioning distance and then adding the through hole reference distance, control the fourth Y-axis motor to move the fifth carrier plate based on the fourth moving distance, and rotate the telescopic arm to be parallel to the seventh carrier plate through the flipping motor;

[0042] Control the third Y-axis motor to move the first carrier plate based on the sum of the sixth reference distance, the third moving distance and the seventh reference distance, and control the pressing arm to rotate and press against the lower front plate;

[0043] Start the fifth Y-axis motor, and stop the operation of the fifth Y-axis motor when it is detected that the positioning stud is inserted into the fifth through hole.

[0044] According to some embodiments of the present invention, controlling the welding arm to weld the side plate and the lower front plate in sequence includes:

[0045] Control the welding arm to weld the joints of the two side plates and the front plate in sequence. After completion, move the welding arm away.

[0046] Control the fifth Y-axis motor to retract the telescopic arm, control the flipping motor to rotate the telescopic arm to be parallel to the rear plate, and control the fifth carrier plate to move away from the rear plate through the fourth Y-axis motor.

[0047] Control the welding arm to weld the joints of the two side plates and the lower front plate, and the joints of the two side plates and the bottom plate.

[0048] Move the pressing arm away and complete the welding of the remaining joints.

[0049] In a third aspect, an embodiment of the present invention provides a welding system for a co-box type ring main unit, including at least one control processor and a memory communicatively connected to the at least one control processor; the memory stores instructions executable by the at least one control processor, and the instructions are executed by the at least one control processor to enable the at least one control processor to execute the welding method for the co-box type ring main unit as described in the second aspect above.

[0050] In a fourth aspect, an embodiment of the present invention provides an electronic device, including the welding system for the co-box type ring main unit as described in the third aspect above.

[0051] In a fifth aspect, an embodiment of the present invention provides a computer-readable storage medium, storing computer-executable instructions for executing the welding method for the co-box type ring main unit as described in the second aspect above.

[0052] The welding jig and welding method of the co - box type ring main unit according to the embodiments of the present invention have at least the following beneficial effects: The welding jig includes a base, and two mounting plates and two X - axis motors with opposite mounting directions are arranged on the upper side of the base. Each mounting plate is respectively connected to one of the X - axis motors, and a positioning component is arranged on the upper side of each of the two mounting plates; The positioning component includes a second carrier plate, a fourth carrier plate, a sixth carrier plate and a seventh carrier plate. The second carrier plate is fixedly connected to the upper side of the mounting plate. The fourth carrier plate is located outside the second carrier plate. The sixth carrier plate is located in front of the second carrier plate. The seventh carrier plate is fixedly connected to the upper side of the sixth carrier plate. The second carrier plate is provided with a first Y - axis motor and a second Y - axis motor with opposite mounting directions. The first Y - axis motor is used to drive the sixth carrier plate to move, and the second Y - axis motor is used to drive the fourth carrier plate to move; Wherein, a first core - pulling shaft matching the fourth through - hole is installed on the outside of the fourth carrier plate, a second core - pulling shaft matching the first through - hole is installed on the upper side of the seventh carrier plate, a fourth core - pulling shaft matching the second through - hole is installed on the upper side of the sixth carrier plate, and a third core - pulling shaft matching the third through - hole is installed on the front side of the sixth carrier plate. According to the technical solution of the embodiments of the present invention, two independent mounting plates are arranged in the base, and the distance between the mounting plates is adjusted by the X - axis motor to meet the requirements of different co - box numbers for the width of the jig. In the positioning component of the mounting plate, with the fixed mounting position of the second carrier plate, different core - pulling shafts are driven to move along the Y - axis by two Y - axis motors, so that the positioning component can meet the requirements of different co - box heights. Different specifications of co - box type ring main units can reuse the same welding jig, which is beneficial to controlling production costs and improving welding efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] Figure 1 is a perspective view of the welding jig provided by an embodiment of the present invention;

[0054] Figure 2 is a left view of the welding jig provided by an embodiment of the present invention after removing one - side top plate;

[0055] Figure 3 is a schematic diagram of installing cabinet plates in the welding jig provided by an embodiment of the present invention;

[0056] Figure 4 is a schematic diagram of the welding system provided by an embodiment of the present invention;

[0057] Figure 5 is a flowchart of the welding method of the co - box type ring main unit provided by another embodiment of the present invention;

[0058] Figure 6 is a structural diagram of the welding system of the co - box type ring main unit provided by another embodiment of the present invention. Detailed Implementation Modes

[0059] The embodiments of the present invention will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, where 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 the present invention and should not be construed as a limitation of the present invention.

[0060] In the description of the present invention, it should be understood that with regard to the orientation description, such as the orientation or positional relationship indicated by up, down, front, back, left, right, etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of the present invention.

[0061] In the description of the present invention, the meaning of "several" is one or more, the meaning of "multiple" is two or more, and understandings such as "greater than", "less than", "exceeding", etc. do not include the present number, and understandings such as "above", "below", "within", etc. include the present number. If there is a description of "first" and "second", it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or implicitly indicating the sequence relationship of the indicated technical features.

[0062] In the description of the present invention, unless otherwise clearly defined, words such as "set", "installed", "connected", etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in the present invention in combination with the specific content of the technical solution.

[0063] The embodiment of the present invention provides a welding jig for a co - box type ring main unit and a welding method thereof. The welding jig includes a base. On the upper side of the base, there are two mounting plates and two X - axis motors with opposite mounting directions. Each mounting plate is respectively connected to one X - axis motor. On the upper sides of the two mounting plates, there is a positioning component respectively. The positioning component includes a second carrier plate, a fourth carrier plate, a sixth carrier plate, and a seventh carrier plate. The second carrier plate is fixedly connected to the upper side of the mounting plate. The fourth carrier plate is located outside the second carrier plate. The sixth carrier plate is located in front of the second carrier plate. The seventh carrier plate is fixedly connected to the upper side of the sixth carrier plate. The second carrier plate is provided with a first Y - axis motor and a second Y - axis motor with opposite mounting directions. The first Y - axis motor is used to drive the sixth carrier plate to move, and the second Y - axis motor is used to drive the fourth carrier plate to move. Among them, on the outside of the fourth carrier plate, there is a first core - pulling shaft matching the fourth through - hole. On the upper side of the seventh carrier plate, there is a second core - pulling shaft matching the first through - hole. On the upper side of the sixth carrier plate, there is a fourth core - pulling shaft matching the second through - hole. On the front side of the sixth carrier plate, there is a third core - pulling shaft matching the third through - hole. According to the technical solution of the embodiment of the present invention, two independent mounting plates are arranged in the base. The distance between the mounting plates is adjusted by the X - axis motor to meet the requirements of the width of the jig for different co - box numbers. In the positioning component of the mounting plate, with the fixed mounting position of the second carrier plate, different core - pulling shafts are driven to move along the Y - axis by two Y - axis motors, so that the positioning component can meet the requirements of different co - box heights. Different specifications of co - box ring main units can reuse the same welding jig, which is beneficial to controlling production costs and improving welding efficiency.

[0064] First, as Figures 1 to 3 shown, this embodiment provides a welding jig for a co - box type ring main unit. The front plate 61 of the ring main unit is provided with a first through - hole 611, the lower front plate 62 is provided with a second through - hole 621, the bottom plate 63 is provided with a third through - hole 631, and the side plate 64 is provided with a fourth through - hole 641. The welding jig includes:

[0065] A base 10. On the upper side of the base 10, there are two mounting plates 11 and two X - axis motors 12 with opposite mounting directions. Each mounting plate 11 is respectively connected to one X - axis motor 12. On the upper sides of the two mounting plates 11, there is a positioning component respectively;

[0066] The positioning component includes a second carrier plate 30, a fourth carrier plate 32, a sixth carrier plate 40, and a seventh carrier plate 41. The second carrier plate 30 is fixedly connected to the upper side of the mounting plate 11. The fourth carrier plate 32 is located outside the second carrier plate 30. The sixth carrier plate 40 is located in front of the second carrier plate 30. The seventh carrier plate 41 is fixedly connected to the upper side of the sixth carrier plate 40. The second carrier plate 30 is provided with a first Y - axis motor 301 and a second Y - axis motor 302 with opposite mounting directions. The first Y - axis motor 301 is used to drive the sixth carrier plate 40 to move, and the second Y - axis motor 302 is used to drive the fourth carrier plate 32 to move.

[0067] Wherein, a first core-pulling shaft 321 matching the fourth through-hole 641 is installed on the outer side of the fourth carrier plate 32, a second core-pulling shaft 411 matching the first through-hole 611 is installed on the upper side of the seventh carrier plate 41, a fourth core-pulling shaft 424 matching the second through-hole 621 is installed on the upper side of the sixth carrier plate 40, and a third core-pulling shaft 421 matching the third through-hole 631 is installed on the front side of the sixth carrier plate 40.

[0068] It should be noted that the ring main unit includes a front plate 61, a lower front plate 62, a bottom plate 63, a top plate and two side plates 64. Since the rear plate of the ring main unit is to be installed after the circuit breaker is installed, the rear plate is not involved in the welding process. And the ring main unit is inverted in the welding jig. As Figure 3 shown, during the welding process, the position where the rear plate is located faces downward, the front plate 61 is located on the upper side of the welding jig, the bottom plate 63 is located on the front side of the welding jig, the top plate is located on the rear side of the welding jig, and the side plates 64 are located on both sides of the welding jig. This will not be repeated hereinafter.

[0069] It should be noted that the base 10 can be a hollow structure, and two X-axis motors 12 with opposite installation directions are arranged in the center of the base 10. As Figure 4 shown, the X-axis motors 12 are arranged in the middle of the base 10. The extending direction of one X-axis motor 12 faces the left side of the base 10 and is used to drive the installation plate 11 on the left side in Figure 4 to move horizontally along the X-axis. The extending direction of the other X-axis motor 12 faces the right side of the base 10 and is used to drive the installation plate 11 on the right side in Figure 4 to move horizontally along the X-axis. The two motors are arranged side by side along the Y-axis. Through the two X-axis motors 12 with opposite installation directions, the two installation plates 11 can approach or move away from each other, so as to realize the position adjustment in the X-axis direction. When the number of coaxial boxes of the multi-coaxial box ring main unit is different, the width of the ring main unit is different. Through the X-axis motor 12 of this embodiment, the width of the welding jig can be adjusted, so as to adapt to the ring main units with different numbers of coaxial boxes. For example, when the double-coaxial box ring main unit has been welded, and it is necessary to continue welding the triple-coaxial box ring main unit, then control the two X-axis motors 12 to drive the installation plates 11 to move a certain distance to both sides, so that the distance between the installation plates 11 is enlarged, so as to expand from the width of the double-coaxial box ring main unit to the width of the triple-coaxial box ring main unit. Of course, it can also be switched back from the triple-coaxial box ring main unit to the double-coaxial box ring main unit, and the X-axis motor 12 drives the installation plates 11 to move towards the middle.

[0070] It should be noted that during the welding process, the electrical holes of each cabinet plate are used as positioning and fixing through-holes, and core-pulling shafts are arranged in the welding jig. The core-pulling shafts can be telescopic. When passing through the through-holes, they can fix the corresponding cabinet plates so that they will not move due to the external force of the welding arm 70 during the welding process. For example Figure 4As shown, the third core-pulling shaft 421 passes through the third through-hole 631 of the bottom plate 63. During the welding process, the bottom plate 63 will receive forces in the X-axis direction and the Z-axis direction. Due to the fixing effect of the third core-pulling shaft 421, the bottom plate 63 will remain stable, thus ensuring the welding quality.

[0071] It should be noted that, in order to achieve the above functions in this embodiment, a positioning component is provided at the mounting plate 11. The positioning component is fixed to the mounting plate 11 with the second carrier plate 30 as the mounting basis. The fourth carrier plate 32, the sixth carrier plate 40 and the seventh carrier plate 41 are installed in the second carrier plate 30. When the mounting plate 11 is movable, it drives the second carrier plate 30 to move synchronously, so as to realize the lateral movement of the entire positioning component in the X-axis direction. In this embodiment, each mounting plate 11 is provided with a positioning component, and the two positioning components are symmetrical to each other. For the convenience of description, the structure of one of the positioning components will be used for the principle description hereinafter.

[0072] It should be noted that, as Figure 1 and Figure 2 shown, the fourth carrier plate 32 is used to install the first core-pulling shaft 321 that matches the fourth through-hole 641 of the side plate 64. Therefore, the fourth carrier plate 32 is located outside the second carrier plate 30, and the first core-pulling shaft 321 can extend and retract towards the outside, which is convenient for matching the fourth through-hole 641 of the side plate 64. The sixth carrier plate 40 is located on the front side of the second carrier plate 30. The sixth carrier plate 40 is provided with a third core-pulling shaft 421 that can extend and retract towards the front side, which is used to match the third through-hole 631 of the bottom plate 63. According to the above description, there will be no difference in the height between the lower front plate 62 and the bottom plate 63. Therefore, the positions of the lower front plate 62 and the bottom plate 63 are relatively fixed. Therefore, the positions of the second through-hole 621 of the lower front plate 62 and the third through-hole 631 of the bottom plate 63 are also relatively fixed. Therefore, in this embodiment, a fourth core-pulling shaft 424 that can extend and retract upwards is provided on the upper side of the sixth carrier plate 40, which is convenient for matching the second through-hole 621 of the lower front plate 62. The seventh carrier plate 41 is installed on the upper side of the sixth carrier plate 40. The seventh carrier plate 41 is used to set the second core-pulling shaft 411 that extends and retracts upwards, which is convenient for matching the first through-hole 611 of the front plate 61.

[0073] It should be noted that the positions of the electrical holes on each cabinet board of the ring main unit are relatively fixed. For example, the position of the electrical hole on the side plate 64 from the top of the side plate 64 is fixed, and the position of the electrical hole on the front plate 61 is fixed relative to the top or bottom of the front plate 61. The top plate is not provided with electrical holes. The main dimensional differences between ring main units of different heights lie in the front plate 61 and the side plate 64. Therefore, the lower front plate 62 and the bottom plate 63 only have different widths due to different numbers of shared enclosures, and the positions of the electrical holes are fixed relative to both sides. Based on this, in order to implement ring main units of different heights, it is necessary to ensure that the welding jig can adjust its position in the Y-axis direction according to the dimensions of the side plate 64 and the front plate 61. Therefore, in this embodiment, the first Y-axis motor 301 and the second Y-axis motor 302 are arranged on the second carrier plate 30 in opposite installation directions. Referring to the principle of the X-axis motor 12, the first Y-axis motor 301 can be connected to the sixth carrier plate 40 through a telescopic rod to drive the sixth carrier plate 40 to move away from the second carrier plate 30 towards the front side. Of course, it can also move closer to the second carrier plate 30 towards the rear side to achieve height adjustment in the Y-axis direction. The second Y-axis motor 302 is the same, driving the fourth carrier plate 32 to move away from the second carrier plate 30 towards the rear side, or move closer to the second carrier plate 30 towards the front side.

[0074] It should be noted that in this embodiment, two driving motors, namely the first Y-axis motor 301 and the second Y-axis motor 302, are provided, which can enable the fourth carrier plate 32 and the sixth carrier plate 40 to move away from the second carrier plate 30 in different directions simultaneously to achieve height adjustment in the Y-axis direction. If only one Y-axis motor is used, for example, only the first Y-axis motor 301 is provided, it will cause the moving distance of the sixth carrier plate 40 to double. Not only will the adjustment time of the welding jig be too long, but also the length of the telescopic rod connected to the sixth carrier plate 40 will be relatively large, which is not conducive to controlling the internal volume of the positioning component. In the case where there are multiple touch switches and suction cups installed inside the positioning component, it will also lead to too long wire harnesses of the internal components and be not conducive to installation. Therefore, in this embodiment, two Y-axis motors are provided at the second carrier plate 30, and the synchronous movement on both sides replaces the single-side movement to improve the Y-axis adjustment efficiency of the welding jig and reduce the wire harness length of the internal components.

[0075] Through the technical solution of this embodiment, the mounting plate 11 can be driven by the X-axis motor 12 to move to adapt to different coaxial numbers of the ring main unit. The second carrier plate 30 is fixedly connected to the mounting plate 11 as the mounting basis of the positioning component. The first Y-axis motor 301 and the second Y-axis motor 302 installed in the reverse direction are arranged at the second carrier plate 30. The sixth carrier plate 40 is connected to the telescopic end of the first Y-axis motor 301. The fourth core-pulling shaft 424 and the third core-pulling shaft 421 are carried by the sixth carrier plate 40 to meet the through-hole positioning of the bottom plate 63 and the lower front plate 62. The fourth carrier plate 32 is connected to the telescopic end of the second Y-axis motor 302. The first core-pulling shaft 321 is carried by the fourth carrier plate 32 to meet the through-hole positioning of the side plate 64. After determining the height of the ring main unit, the welding jig can control the movement of the first Y-axis motor 301 and the second Y-axis motor 302 by using the specific positional relationship of the electrical holes of the ring main unit, so that each core-pulling shaft can be aligned with the corresponding through-hole, and the cabinet plate installation and positioning of ring main units of different sizes can be realized.

[0076] In addition, in one embodiment, at least one fourth touch switch 422 and at least one fourth suction cup 423 are further arranged on the front side of the sixth carrier plate 40, a fifth touch switch 425 is arranged on the upper side of the sixth carrier plate 40, a plurality of first touch switches 323 and a plurality of first suction cups 322 are arranged on the outer side of the fourth carrier plate 32, a third touch switch 412 and a third suction cup 413 are arranged on the upper side of the seventh carrier plate 41 and / or the upper side of the fourth carrier plate 32, and the upper side of the fourth carrier plate 32 is flush with the upper side of the seventh carrier plate 41;

[0077] It further includes a third carrier plate 31. The third carrier plate 31 is connected to the second Y-axis motor 302. The fourth carrier plate 32 is fixedly connected to the third carrier plate 31. The third carrier plate 31 is located at the rear side of the second carrier plate 30. At least one second touch switch 341 and at least one second suction cup 342 are arranged on the rear side of the third carrier plate 31.

[0078] It should be noted that the touch switch in this embodiment can be a common snap switch or a pressure sensor, as long as it can generate an electrical signal after contacting the corresponding cabinet plate. For example, as Figure 3 shown, after the bottom plate 63 is installed on the front side of the sixth carrier plate 40, the inner side of the bottom plate 63 contacts the fourth touch switch 422, so that the fourth touch switch 422 generates an electrical signal. The same applies to other touch switches and will not be repeated here.

[0079] It should be noted that in this embodiment, at least one cabinet plate needs to be installed on each carrier plate, and the core-pulling shaft can realize the fixation of a plane. Since the welding jig in this embodiment is a three-dimensional structure, the side plate 64, the top plate, and the bottom plate 63 may tip over under the action of gravity. Therefore, in this embodiment, suction cups are further arranged at each carrier plate to provide an adsorption force through the suction cups to realize the fixation of the cabinet plate. For example, for Figure 3For the side plate 64 shown, the first core-pulling shaft 321 can be fixed in the plane formed by the X-axis and the Z-axis. However, without a force in the Y-axis direction, the side plate 64 may tip outward under the action of gravity. In this embodiment, a first suction cup 322 is provided on the fourth carrier plate 32. The side plate 64 is adsorbed in the Y-axis direction by the first suction cup 322 facing outward, so that the side plate 64 can be fixed on the outside of the fourth carrier plate 32. At the same time, although the front plate 61 will not tip over under the action of gravity, in this embodiment, a third suction cup 413 is still provided on the upper side of the seventh carrier plate 41 to fix the position of the front plate 61 through the third suction cup 413 and prevent the front plate 61 from shifting during the welding process. Since the lower front plate 62 is installed between the bottom plate 63 and the front plate 61, it can already be fixed under the action of the fourth core-pulling shaft 424 and does not require an additional suction cup.

[0080] It should be noted that the number and positions of the touch switches on each carrier plate in this embodiment are not limited, as long as the relevant effects can be achieved. For example Figure 1 As shown, a plurality of first suction cups 322 can be provided on the outside of the fourth carrier plate 32 to provide multi-point fixation for the side plate 64 and improve stability.

[0081] In addition, in an embodiment, the mounting plate 11 is provided with a third Y-axis motor 33. The mounting direction of the third Y-axis motor 33 is the same as that of the first Y-axis motor 301. The second carrier plate 30 is further provided with a fourth Y-axis motor 35. The mounting direction of the fourth Y-axis motor 35 is the same as that of the second Y-axis motor 302. The positioning assembly further includes:

[0082] The first carrier plate 20 is located in front of the sixth carrier plate 40. The third Y-axis motor 33 is used to drive the first carrier plate 20 to move. The first carrier plate 20 is installed with a pressing arm 21. The pressing arm 21 can rotate in the front-rear direction. When the pressing arm 21 is in the downward pressing state, the pressing arm 21 abuts against the lower front plate 62;

[0083] The fifth carrier plate 50 is located behind the third carrier plate 31. The fourth Y-axis motor 35 is used to drive the fifth carrier plate 50 to move. The fifth carrier plate 50 is provided with a flipping motor 521 and a telescopic arm 511. The flipping motor 521 is used to drive the telescopic arm 511 to rotate in the front-rear direction. The telescopic arm 511 can press against the upper side of the front plate 61.

[0084] It should be noted that the third Y-axis motor 33 in this embodiment is installed on the mounting plate 11. The mounting direction of the third Y-axis motor 33 is the same as that of the first Y-axis motor 301. The third Y-axis motor 33 is connected to the first carrier plate 20. The first carrier plate 20 is located in front of the sixth carrier plate 40. In this embodiment, a rotatable pressing arm 21 is provided at the first carrier plate 20, as Figure 3As shown, after the lower front plate 62 is installed, the lower front plate 62 is pressed by the pressing arm 21 so that the lower front plate 62 can be fixed between the bottom plate 63 and the front plate 61. Since the sixth carrier plate 40 can move along the Y-axis, in this embodiment, the third Y-axis motor 33 is provided to drive the first carrier plate 20 to move. Since the second carrier plate 30 and the mounting plate 11 are used as the mounting references, the extension distance of the first carrier plate 20 must be greater than that of the sixth carrier plate 40. Therefore, the telescopic length of the third Y-axis motor 33 must be greater than that of the first Y-axis motor 301, and the size of the third Y-axis motor 33 may be larger than that of the first Y-axis motor 301. In this embodiment, the third Y-axis motor 33 is installed at the mounting plate 11 to ensure that the third Y-axis motor 33 has a more sufficient installation area, and can also reduce the space occupied by the second carrier plate 30 and provide an installation space for other Y-axis motors.

[0085] It should be noted that in this embodiment, the first Y-axis motor 301, the second Y-axis motor 302, and the fourth Y-axis motor 35 are provided at the second carrier plate 30. The fourth Y-axis motor 35 is connected to the fifth carrier plate 50. At the fifth carrier plate 50, a telescopic arm 511 for fixing the front plate 61 is provided. The fifth carrier plate 50 is located at the rear side of the fourth carrier plate 32. As Figure 4 shown, since a top plate needs to be provided at the rear side of the fourth carrier plate 32, the fourth Y-axis motor 35 is installed at the lowermost side of the second carrier plate 30 so that the telescopic rod of the fourth Y-axis motor 35 can be located below the top plate to avoid affecting the installation of the top plate. The relative positions of the first Y-axis motor 301 and the second Y-axis motor 302 do not need to be limited.

[0086] It should be noted that as Figures 1 to 3 shown, in this embodiment, a flipping motor 521 and a telescopic arm 511 are provided at the fifth carrier plate 50. The flipping motor 521 can drive the telescopic arm 511 to flip. As Figure 2 shown, it is the standby state of the telescopic arm 511. At this time, the telescopic arm 511 is in a vertically retracted state, reducing the space occupation. As Figure 3 shown, it is the working state of the telescopic arm 511. Rotate the flipping motor 521 in the counterclockwise direction as Figure 2 shown so that the telescopic arm 511 is parallel to the front plate 61, and then cover the upper side edge of the front plate 61 through the telescopic function, thereby fixing the front plate 61, which is convenient for welding the splicing part of the front plate 61 and the side plate 64.

[0087] In addition, in one embodiment, the flipping motor 521 is connected to the fifth Y-axis motor 512. The fifth Y-axis motor 512 is used to drive the telescopic arm 511 to expand and contract. A plurality of elastic columns 513 are provided on the lower side of the telescopic arm 511. A fifth through hole is provided at the end of the telescopic arm 511 away from the fifth carrier plate 50. A positioning stud is provided at the end of the pressing arm 21 away from the first carrier plate 20. When the pressing arm 21 is in the downward pressing state and the telescopic arm 511 is in the state of being extended to the longest, the positioning stud is inserted into the fifth through hole.

[0088] It should be noted that the principle of the flipping motor 521 to achieve flipping refers to the above-described embodiment. In this embodiment, the fifth Y-axis motor 512 is further provided to drive the expansion and contraction of the telescopic arm 511 to ensure that the telescopic arm 511 can be tightly pressed against the upper side of the entire front plate 61.

[0089] It should be noted that a plurality of elastic columns 513 are provided on the lower side of the telescopic arm 511. As Figure 2 shown, after the telescopic arm 511 rotates counterclockwise, the elastic columns 513 face the front plate 61 to fix the front plate 61. Since the elastic columns 513 have a certain elasticity, the elastic columns 513 are compressed when pressing the front plate 61, which will neither damage the surface of the front plate 61 nor can the elastic force of the elastic columns 513 be used to tightly press and fix the front plate 61.

[0090] It should be noted that according to the description of the above embodiment, the pressing arm 21 can be tightly pressed against the front side of the lower front plate 62, and the pressing arm 21 can adopt an L-shaped structure matching the lower front plate 62. As Figure 4 shown, in this embodiment, the height of the end of the pressing arm 21 is set to be higher than that of the lower front plate 62, so that the pressing arm 21 protrudes above the lower front plate 62 in the pressing state. A positioning stud is provided at the end of the pressing arm 21, and a fifth through hole is provided at the end of the telescopic arm 511. When the telescopic arm 511 moves forward under the drive of the fifth Y-axis motor 512, the fifth through hole can penetrate into the positioning stud and abut against the pressing arm 21. At this time, the cooperation of the fifth through hole and the positioning stud can lock the telescopic arm 511 and the pressing arm 21, so that the telescopic arm 511 will not shift in the Z-axis direction, improving the stability during the welding process.

[0091] Next, based on the Figures 1 to 4 structure shown, the technical solution of the embodiment of the present invention will be further elaborated.

[0092] Referring to Figure 5 , Figure 5 which is a flowchart of a welding method for a common box type ring main unit provided by an embodiment of the present invention. The welding method for the common box type ring main unit includes but is not limited to the following steps:

[0093] In a second aspect, an embodiment of the present invention provides a welding method for a common box type ring main unit, which is applied to the upper computer of a welding system. The welding method includes:

[0094] S10. Obtain the number of shared enclosures and the target model of the target circuit breaker based on the configuration interface;

[0095] S20. Determine the first distance based on the preset unit enclosure width and the number of shared enclosures, generate a first movement instruction based on half of the first distance, and send the first movement instruction to two X-axis motors respectively, where the unit enclosure width is used to indicate the enclosure width required for a single circuit breaker;

[0096] S30. Determine the enclosure height and the side plate positioning distance based on the target model, generate a second movement instruction based on the side plate positioning distance, generate a third movement instruction based on the enclosure height, send the second movement instruction to the second Y-axis motor, and send the third movement instruction to the first Y-axis motor, where the side plate positioning distance is used to indicate the Y-axis distance between the fourth through hole of the side plate and the second Y-axis motor;

[0097] S40. Fix the side plate to the side of the welding jig based on the first core-pulling shaft and the fourth through hole, fix the front plate to the upper side of the welding jig based on the second core-pulling shaft and the first through hole, fix the bottom plate to the front side of the welding jig based on the third core-pulling shaft and the third through hole, and fix the lower front plate between the front plate and the bottom plate based on the fourth core-pulling shaft and the second through hole;

[0098] S50. Control the welding arm to weld the side plate and the lower front plate in sequence.

[0099] It should be noted that the structure and action principle of the welding jig in this embodiment can refer to the description of the above embodiment, and will not be repeated here.

[0100] It should be noted that before welding starts, in this embodiment, the number of shared enclosures and the target model of the target circuit breaker can be input on the configuration interface of the host computer. According to the description of the above embodiment, the number of shared enclosures depends on the number of target circuit breakers installed inside, and the enclosure width of each target circuit breaker is known. Therefore, when the number of shared enclosures is different, the width required by the welding jig in the X-axis direction is different. In this embodiment, the unit enclosure width is preset on the host computer, and the width required for the enclosure of a target circuit breaker is represented by the unit enclosure width. The welding operator only needs to input the number of shared enclosures, and the host computer can determine the width required in the X-axis direction according to the number of shared enclosures and the unit enclosure width, that is, the first distance in this embodiment. As Figure 1 and Figure 3 shown, this embodiment is provided with two X-axis motors 12. Therefore, the distance that each X-axis motor 12 needs to move is half of the first distance. This embodiment generates a first movement instruction based on half of the first distance, and the X-axis motor 12 can move according to the first movement instruction. No more details about the specific movement control will be elaborated here.

[0101] It should be noted that the box heights of different target circuit breakers are different. The ring main unit of this embodiment is deployed in the welding jig with the rear plate facing downwards. Therefore, the box height is reflected in Figure 1 the Y-axis direction shown. According to the description of the above embodiment, the displacement in the Y-axis direction can be provided by the first Y-axis motor 301 and the second Y-axis motor 302. The fourth carrier plate 32 extends backward, and the sixth carrier plate 40 extends forward to achieve the distance adjustment in the Y-axis direction. Based on this, after determining the box height, it is necessary to determine the respective displacements of the first Y-axis motor 301 and the second Y-axis motor 302 to ensure that the welding jig can align with the ring main unit corresponding to the target circuit breaker in the Y-axis direction.

[0102] It should be noted that in the welding jig, a bottom plate 63 is installed on the front side of the sixth carrier plate 40, and a side plate 64 is installed on the outer side of the fourth carrier plate 32. According to the description of the above embodiment, although the box heights of different models of ring main units are different, the relative position between the fourth through hole 641 of the side plate 64 and the top side of the side plate 64 is fixed. This embodiment utilizes this characteristic to preset the positioning distance of the side plate 64 for each model in the upper computer. The positioning distance of the side plate 64 represents the Y-axis distance between the fourth positioning hole of different side plates 64 and the second Y-axis motor 302. As long as the extension amount of the second Y-axis motor 302 meets the positioning distance of the side plate 64, it can ensure that the first core-pulling shaft 321 is necessarily aligned with the fourth through hole 641 of the side plate 64. On this basis, the first Y-axis motor 301 further expands and contracts so that the Y-axis distance between the rear sides of the sixth carrier plate 40 and the fourth carrier plate 32 is equal to the box height. The first Y-axis motor 301 and the second Y-axis motor 302 are pre-installed on the second carrier plate 30. Therefore, after determining the box height, this embodiment first calculates the extension amount of the second Y-axis motor 302 based on the positioning distance of the side plate 64 to meet the installation requirements of the side plate 64, and then calculates the extension amount of the first Y-axis motor 301 in combination with the box height, so that after installing the bottom plate 63 on the front side of the sixth carrier plate 40, the splicing position of the bottom plate 63 and the side plate 64 can be aligned, thereby improving the welding accuracy.

[0103] It should be noted that after moving according to the above method, the Y-axis distance between the first core-pulling shaft 321 and the second Y-axis motor 302 is equal to the positioning distance of the side plate 64. For example, the origin of the telescopic rod of the second Y-axis motor 302 can be pre-configured as a reference position, and the distance between the center of the first core-pulling shaft 321 and the reference position is used as the positioning distance of the side plate 64, which can ensure that the first core-pulling shaft 321 is aligned with the fourth through hole 641. As Figure 3 shown, at this time, the first core-pulling shaft 321 can be extended to pass through the fourth through hole 641 to fix the side plate 64 on the side of the welding jig. The control of the second core-pulling shaft 411, the third core-pulling shaft 421, and the fourth core-pulling shaft 424 is the same, and will not be repeated here.

[0104] In addition, in one embodiment, in step S20, a first movement instruction is generated based on half of the first distance, which specifically includes but is not limited to the following steps:

[0105] S21, obtain a preset first reference distance, where the first reference distance is used to indicate the minimum distance between the X-axis motor and the fourth carrier board;

[0106] S22, obtain the extended length of the X-axis motor, where the extended length is used to indicate the distance that the mounting plate has moved in the direction away from the X-axis motor;

[0107] S23, subtract the first reference distance and the extended length from half of the value of the first distance in sequence to obtain a first movement distance, and generate a first movement instruction based on the first movement distance.

[0108] It should be noted that according to the description of the above embodiment, after determining the first distance according to the number of co-boxes, the first distance is the distance between the left and right side plates 64. However, in this embodiment, there are two X-axis motors 12, and the X-axis motors 12 and the mounting plate 11 itself have a certain width. For example, the body of the X-axis motor 12 has a certain length. The X-axis motor 12 is connected to the mounting plate 11 through a telescopic rod, and there is also a certain X-axis distance between the connection point of the X-axis motor 12 and the mounting plate 11 and the fourth carrier board 32. Therefore, the moving length of the X-axis motor 12 cannot be directly based on half of the first distance, otherwise the distance between the two fourth carrier boards 32 will be greater than the first distance. Based on this, after setting up the welding jig, since the second carrier board 30 is fixedly installed on the mounting plate 11, the relative position between the second carrier board 30 and the mounting plate 11 is fixed. The fourth carrier board 32 is connected to the second carrier board 30 through the second Y-axis motor 302, and the movement of the fourth carrier board 32 is limited to the Y-axis. Therefore, it can be determined that the X-axis distance between the fourth carrier board 32 and the X-axis motor 12 completely depends on the extension amount of the X-axis motor 12. When the X-axis motor 12 is in the standby state of being fully retracted, the X-axis distance between the fourth carrier board 32 and the X-axis motor 12 can be measured. Taking this variable as a and the first distance as b, the extension amount of the X-axis motor 12 is b - a. Based on this, in this embodiment, the first reference distance, that is, the above variable a, is predicted in the host computer. The first reference distance can be measured after the assembly of the welding jig is completed, and the specific measurement method will not be elaborated here.

[0109] It should be noted that the welding jig in this embodiment does not need to perform the reset of the X-axis motor 12 every time. After determining the first distance based on the number of co-boxes, the extension length can be determined according to the current state of the X-axis motor 12. The difference amount to be moved is obtained by subtracting half of the value of the first distance from the extension length as the first moving distance. When the first moving distance is positive, the first moving instruction is used to control the X-axis motor 12 to continue extending the first moving distance towards the far end. When the first moving distance is negative, the X-axis motor 12 is controlled to retract the first moving distance.

[0110] Exemplarily, continuing with the first reference distance being a, the extension length of the X-axis motor 12 being c, after inputting the number of co-boxes, the calculated first distance is b. Then the first moving distance d for this movement = (b / 2) - a - c. For example, if double co-box welding was completed last time and the number of co-boxes input this time is 3, then the value of d is greater than zero, and the X-axis motor 12 drives the mounting plate 11 to continue moving away from the center in response to the first moving instruction, with a moving distance of d. If the number of co-boxes input is 1, then conversely, the X-axis motor 12 drives the mounting plate 11 to contract towards the center by a distance of d in response to the first moving instruction.

[0111] In addition, in one embodiment, in step S30, based on the target model, the box height and the side plate 64 positioning distance are determined, a second moving instruction is generated based on the side plate 64 positioning distance, and a third moving instruction is generated based on the box height. Specifically, it includes but is not limited to the following steps:

[0112] S31, obtain the preset second reference distance, third reference distance, and fourth reference distance. Among them, the second reference distance is used to indicate the minimum Y-axis distance between the second Y-axis motor and the first core-pulling shaft, the third reference distance is used to indicate the minimum Y-axis distance between the first Y-axis motor and the third core-pulling shaft, and the fourth reference distance is used to indicate the Y-axis distance between the first Y-axis motor and the second Y-axis motor;

[0113] S32, obtain the preset mapping table, and based on the target model, obtain the box height, side plate positioning distance, and through-hole reference distance from the preset mapping table. Among them, the through-hole reference distance is used to indicate the distance between the fourth through-hole and the rear end of the side plate, and the preset mapping table records the distance information corresponding to the circuit breaker model;

[0114] S33, determine the difference between the side plate positioning distance and the second reference distance as the second moving distance, and generate a second moving instruction based on the second moving distance;

[0115] S34, subtract the second moving distance, third reference distance, fourth reference distance, and through-hole reference distance from the box height in sequence to obtain the third moving distance, and generate a third moving instruction based on the third moving distance.

[0116] It should be noted that, referring to the principle of the above first reference distance, the first core-pulling shaft 321 is fixed to the fourth carrier plate 32. Therefore, the minimum Y-axis distance between the first core-pulling shaft 321 and the second Y-axis motor 302 is the distance when the second Y-axis motor 302 is in a fully contracted state, that is, the second reference distance in this embodiment. The sum of the extension amount of the second Y-axis motor 302 in the Y-axis direction and the second reference distance is the final Y-axis distance between the first core-pulling shaft 321 and the second Y-axis motor 302. Since the second Y-axis motor 302 is fixedly installed on the second carrier plate 30, its Y-axis position will not change. The side plate 64 positioning distance is the distance between the fourth through hole 641 and the second Y-axis motor 302, which can be obtained by prior measurement of the ring main unit of each type of circuit breaker before welding. The third reference distance is the same and will not be repeated here. The fourth reference distance is the Y-axis distance between the first Y-axis motor 301 and the second Y-axis motor 302, which can also be directly measured after the welding jig is installed, and the fourth reference distance is a fixed value.

[0117] It should be noted that in this embodiment, a preset mapping table is set in the host computer, and distance information such as the box height, side plate 64 positioning distance, and through hole reference distance corresponding to different models is recorded in the preset mapping table. Since the positions of the electrical holes of the side plates 64 of different models and the top are fixed, the through hole reference distance can be a fixed value.

[0118] It should be noted that after obtaining the side plate 64 positioning distance, the larger second moving distance obtained by taking the difference between the side plate 64 positioning distance and the second reference distance is the extension amount of the second Y-axis motor 302. When the extension amount of the second Y-axis motor 302 reaches the second moving distance, it can be determined that the distance between the first core-pulling shaft 321 and the second Y-axis motor 302 is equal to the side plate 64 positioning distance.

[0119] It should be noted that, referring to the description of the above structural embodiments, in this embodiment, the two directions along the Y-axis are extended to meet the height of the box body. In order to determine the extension amounts required for the two Y-axis motors respectively, in this embodiment, the second moving distance is first determined as reference data. After fixing the positions of the first core-pulling shaft 321 and the fourth through hole 641, the moving distance of the first Y-axis motor 301 can be further determined in combination with the height of the box body and the second moving distance. Calculating from the rear side of the welding jig forward, the rear end of the side plate 64 corresponds to the installation position of the top plate. Therefore, the through hole reference distance is the Y-axis distance from the rear plate to the first core-pulling shaft 321, the second moving distance is the Y-axis distance from the first core-pulling shaft 321 to the second Y-axis motor 302, the third reference distance is the Y-axis distance from the second Y-axis motor 302 to the first Y-axis motor 301. Since the sixth carrier plate 40 is distributed in the plane formed by the X-axis and the Y-axis, the third moving distance is the Y-axis distance from the first Y-axis motor 301 to the third core-pulling shaft 421. Therefore, the extension amount of the first Y-axis motor 301 is the height of the box body minus the second moving distance, the third reference distance, the fourth reference distance, and the through hole reference distance in sequence.

[0120] In addition, in one embodiment, step S40 specifically includes but is not limited to the following steps:

[0121] S41, when detecting the trigger signal of the first touch switch, control the first core-pulling shaft to switch to the extended state, and start the first suction cup to suck the side plate tightly to the outside of the fourth carrier plate;

[0122] S42, when detecting the trigger signal of the second touch switch, start the second suction cup to suck the rear plate tightly to the rear side of the third carrier plate;

[0123] S43, when detecting the trigger signal of the third touch switch, control the second core-pulling shaft to switch to the extended state, and start the third suction cup to suck the front plate tightly to the upper sides of the seventh carrier plate and the fourth carrier plate;

[0124] S44, when detecting the trigger signal of the fourth touch switch, control the third core-pulling shaft to switch to the extended state, and start the fourth suction cup to suck the bottom plate tightly to the front side of the sixth carrier plate;

[0125] S45, when detecting the trigger signal of the fifth touch switch, control the fourth core-pulling shaft to switch to the extended state.

[0126] It should be noted that after the movement of the welding jig is completed according to the above embodiments, corresponding cabinet plates need to be installed on each carrier plate of the welding jig. According to the description of the above structural embodiments, a touch switch and a suction cup are provided at each carrier plate. Therefore, after the corresponding cabinet plate is detected through the touch switch, the core-pulling shaft can be first controlled to extend. If the core-pulling shaft successfully extends, it can be determined that the corresponding through holes are aligned and the installation position of the cabinet plate is correct, and then the corresponding suction cup can be activated to suck the cabinet plate tightly. If resistance is encountered during the extension of the core-pulling shaft, it can be determined that the cabinet plate is not aligned, and an alarm can be given.

[0127] Exemplarily, referring to Figure 3 and Figure 4 , taking the side plate 64 as an example of the cabinet plate, since the welding jig has moved into place, the welder can manually align the fourth through hole 641 and the first core-pulling shaft 321. When the side plate 64 is placed on the surface of the fourth carrier plate 32, the first touch switch 323 generates a trigger signal, and the upper computer controls the first core-pulling shaft 321 to switch from the retracted state to the extended state. After the first core-pulling shaft 321 is fully extended, the first suction cup 322 is activated to suck the side plate 64 tightly. The same applies to other cabinet plates and will not be repeated here.

[0128] In addition, in one embodiment, before performing step S50, the method further includes but is not limited to the following steps:

[0129] S51, obtaining a fifth reference distance and a sixth reference distance based on a preset mapping table, and obtaining a preset seventh reference distance, where the fifth reference distance is used to indicate the Y-axis distance between the fourth Y-axis motor and the second Y-axis motor, and the sixth reference distance is used to indicate the Y-axis distance between the first Y-axis motor and the third Y-axis motor;

[0130] S52, obtaining a fourth moving distance by subtracting the fifth reference distance from the side plate positioning distance and then adding the through hole reference distance, and controlling the fourth Y-axis motor to move the fifth carrier plate based on the fourth moving distance, and rotating the telescopic arm to be parallel to the seventh carrier plate through the flipping motor;

[0131] S53, controlling the third Y-axis motor to move the first carrier plate based on the sum of the sixth reference distance, the third moving distance, and the seventh reference distance, and controlling the pressing arm to rotate and press against the lower front plate;

[0132] S54, starting the fifth Y-axis motor, and stopping the operation of the fifth Y-axis motor when it is detected that the positioning stud is inserted into the fifth through hole.

[0133] It should be noted that as Figure 2As shown, the first Y-axis motor 301 and the third Y-axis motor 33 are arranged in the same direction facing the front side at different mounting positions, and the second Y-axis motor 302 and the fourth Y-axis motor 35 are arranged in the same direction facing the rear side at different mounting positions. In this embodiment, the fifth reference distance and the sixth reference distance are further recorded in the preset mapping table. The Y-axis distance between the fourth Y-axis motor 35 and the second Y-axis motor 302 is characterized by the fifth reference distance, and the Y-axis distance between the first Y-axis motor 301 and the third Y-axis motor 33 is characterized by the sixth reference distance.

[0134] It should be noted that the positioning distance of the side plate 64 is the distance between the second Y-axis motor 302 and the first core-pulling shaft 321. After subtracting the fifth reference distance from the positioning distance of the side plate 64, the obtained distance is the distance between the fourth Y-axis motor 35 and the first core-pulling shaft 321. At this time, by further adding the through-hole reference distance, the obtained fourth moving distance is the distance between the fourth Y-axis motor 35 and the rear end of the fourth carrier plate 32, that is, the Y-axis distance between the fourth Y-axis motor 35 and the installed top plate. When the fourth Y-axis motor 35 moves based on the fourth moving distance, since there is a certain distance between the fifth carrier plate 50 itself and the fourth Y-axis motor 35, the fifth carrier plate 50 will be located at the rear side of the top plate. At this time, control the flipping motor 521 to drive the telescopic arm 511 to rotate 90 degrees parallel to the seventh carrier plate 41, and the front plate 61 located on the upper side can be fixed.

[0135] It should be noted that, similarly, based on the sixth reference distance, the third moving distance, and the seventh reference distance, the third Y-axis motor 33 can be driven to drive the first carrier plate 20, so that the first carrier plate 20 is located in front of the sixth carrier plate 40, and the pressing arm 21 is located in front of the bottom plate 63. After flipping, it can be pressed against the lower front plate 62. Of course, the specific extension amount of the third Y-axis motor 33 can be determined according to the actual position requirements of the pressing arm 21. In this embodiment, step S53 can determine the moving distance of the first carrier plate 20 in front of the sixth carrier plate 40. On this basis, the third Y-axis motor 33 can be further controlled to move in combination with the length of the pressing arm 21, so that the pressing arm 21 can abut against the lower front plate 62 after being pressed down.

[0136] It should be noted that when the host computer obtains the signal that the pressing arm 21 has completed pressing down, start the fifth Y-axis motor 512 so that the fifth through-hole is inserted into the positioning stud, and stop the machine when the fifth Y-axis motor 512 detects resistance.

[0137] In addition, in one embodiment, step S50 specifically includes but is not limited to the following steps:

[0138] S55, control the welding arm to weld the joints of the two side plates and the front plate in sequence, and move the welding arm away after completion;

[0139] S56, control the fifth Y-axis motor to retract the telescopic arm, control the flipping motor to turn the telescopic arm to be parallel to the rear plate, and control the fifth carrier plate to move away from the rear plate through the fourth Y-axis motor;

[0140] S57, control the welding arm to weld the joints of the two side plates and the lower front plate, and the joints of the two side plates and the bottom plate;

[0141] S58, move away the pressing arm and complete the welding of the remaining joints.

[0142] It should be noted that, as shown in Figure 4 After setting the front plate 61, the bottom plate 63, the side plates 64, the lower front plate 62 and the top plate in the welding jig, the telescopic arm 511 is located at the joint of the side plate 64 and the front plate 61. The telescopic arm 511 is mainly used to fix the front plate 61. Since the welding process is mainly completed by the welding arm 70, if the position of the telescopic arm 511 is maintained all the time, as can be seen from Figure 4 When welding the joint of the side plate 64 and the top plate, or the joint of the side plate 64 and the lower front plate 62, the telescopic arm 511 will block the welding arm 70 and affect the normal welding. Therefore, in this embodiment, the welding arm 70 is first controlled to weld the joints of the two side plates 64 and the front plate 61 in sequence. For example, Figure 4 In the figure, the joint of the left side plate 64 and the front plate 61 is welded first, and then the same operation is performed on the right side, so that both sides of the front plate 61 are fixed to a side plate 64 respectively. The specific welding control is not within the scope of discussion of this embodiment and will not be elaborated here.

[0143] It should be noted that after the above welding operation is completed, both sides of the front plate 61 are fixedly connected to the side plates 64. Therefore, there is no risk of movement of the front plate 61 in the Z-axis direction. In order to avoid interference with the subsequent welding process, in this embodiment, the welding arm 70 is first moved away to provide space for the retraction of the telescopic arm 511. Then, after controlling the fifth Y-axis motor 512 to retract the telescopic arm 511, the flipping motor 521 is controlled to reset the telescopic arm 511 to the Figure 2 morphology shown in the figure. Since the joint of the top plate and the side plate 64 still needs to be welded, the fifth carrier plate 50 can be further controlled to move away from the rear plate by the fourth Y-axis motor 35 to leave the welding space for the welding arm 70. The specific moving distance can be determined according to the welding requirements of the welding arm 70. For example, if the required Y-axis space for the welding requirement is M meters, then the fourth Y-axis motor 35 can be further extended according to the difference between M meters and the fourth moving distance.

[0144] It should be noted that after the telescopic arm 511 is retracted, the pressing arm 21 will similarly interfere with the welding at the joint between the lower front plate 62 and the bottom plate 63. Therefore, in the next step of this embodiment, the welding arm 70 is controlled to weld the joints between the lower front plate 62 and the side plate 64, and between the side plate 64 and the bottom plate 63 along the Y-axis direction, so as to completely fix the lower front plate 62 and the bottom plate 63 from the side, preventing them from moving. At this time, the fixing function of the pressing arm 21 is no longer required. After the pressing arm 21 is removed, the welding of the remaining joints can be completed.

[0145] As Figure 6 shown, Figure 6 is a structural diagram of a welding system for a co-box type ring main unit provided by an embodiment of the present invention. The present invention also provides a welding system for a co-box type ring main unit, including:

[0146] A processor 401, which can be implemented by a general-purpose central processing unit (CPU), a microprocessor, an application-specific integrated circuit (ASIC), or one or more integrated circuits, etc., and is used to execute relevant programs to implement the technical solutions provided by the embodiments of the present application;

[0147] A memory 402, which can be implemented in the form of a read-only memory (ROM), a static storage device, a dynamic storage device, or a random access memory (RAM), etc. The memory 402 can store an operating system and other application programs. When implementing the technical solutions provided by the embodiments of this specification through software or firmware, the relevant program codes are stored in the memory 402 and are called by the processor 401 to execute the welding method for the co-box type ring main unit of the embodiments of the present application;

[0148] An input / output interface 403, which is used to implement information input and output;

[0149] A communication interface 404, which is used to implement communication interaction between this device and other devices, and can achieve communication through a wired method (such as USB, network cable, etc.) or through a wireless method (such as mobile network, WIFI, Bluetooth, etc.);

[0150] A bus 405, which transmits information between various components of the device (such as the processor 401, the memory 402, the input / output interface 403, and the communication interface 404);

[0151] Among them, the processor 401, the memory 402, the input / output interface 403, and the communication interface 404 are communicatively connected to each other inside the device through the bus 405.

[0152] An embodiment of the present application further provides an electronic device, including the welding system of the co-box type ring main unit as described above.

[0153] An embodiment of the present application further provides a storage medium, which is a computer-readable storage medium. The storage medium stores a computer program, and when the computer program is executed by a processor, the welding method of the co-box type ring main unit as described above is implemented.

[0154] As a non-transitory computer-readable storage medium, the memory can be used to store non-transitory software programs and non-transitory computer-executable programs. In addition, the memory may include high-speed random access memory, and may also include non-transitory memory, such as at least one magnetic disk storage device, a flash memory device, or other non-transitory solid-state storage devices. In some embodiments, the memory may optionally include a memory remotely disposed relative to the processor, and these remote memories may be connected to the processor through a network. Examples of the above networks include, but are not limited to, the Internet, an enterprise intranet, a local area network, a mobile communication network, and combinations thereof. The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separated, and may be located in one place, or may be distributed to multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0155] Those of ordinary skill in the art will understand that all or some of the steps in the methods disclosed above can be implemented as software, firmware, hardware, and appropriate combinations thereof. Some or all of the physical components can be implemented as software executed by a processor, such as a central processing unit, a digital signal processor, or a microprocessor, or as hardware, or as an integrated circuit, such as an application specific integrated circuit. Such software can be distributed on a computer-readable medium, which can include a computer storage medium (or non-transitory medium) and a communication medium (or transitory medium). As is well known to those of ordinary skill in the art, the term computer storage medium includes volatile and non-volatile, removable and non-removable media implemented in any method or technology for storing information, such as computer-readable instructions, data structures, program modules, or other data. Computer storage media includes, but is not limited to, RAM, ROM, EEPROM, flash memory or other memory technologies, CD-ROM, digital versatile disks (DVD) or other optical disk storage, magnetic cassettes, magnetic tape, magnetic disk storage or other magnetic storage systems, or any other medium that can be used to store the desired information and can be accessed by a computer. In addition, it is well known to those of ordinary skill in the art that communication media typically includes computer-readable instructions, data structures, program modules, or other data in a modulated data signal such as a carrier wave or other transmission mechanism, and can include any information delivery medium.

[0156] The above is a specific description of the preferred embodiments of the present invention, but the present invention is not limited to the above embodiments. Those skilled in the art can also make various equivalent deformations or substitutions without departing from the spirit of the present invention, and these equivalent deformations or substitutions are all included within the scope defined by the claims of the present invention.

Claims

1. A welding fixture for a common box type ring main unit, wherein the front plate of the ring main unit is provided with a first through hole, the lower front plate is provided with a second through hole, the bottom plate is provided with a third through hole, and the side plate is provided with a fourth through hole, characterized in that: The welding jig comprises: A base, wherein two mounting plates and two X-axis motors with opposite mounting directions are arranged on the upper side of the base, each mounting plate is connected to one of the X-axis motors, and a positioning assembly is arranged on the upper side of the two mounting plates; The positioning assembly includes a second carrier plate, a fourth carrier plate, a sixth carrier plate and a seventh carrier plate, the second carrier plate is fixedly connected to the upper side of the mounting plate, the fourth carrier plate is located on the outer side of the second carrier plate, the sixth carrier plate is located on the front side of the second carrier plate, the seventh carrier plate is fixedly connected to the upper side of the sixth carrier plate, the second carrier plate is provided with a first Y-axis motor and a second Y-axis motor with opposite installation directions, the first Y-axis motor is used to drive the sixth carrier plate to move, and the second Y-axis motor is used to drive the fourth carrier plate to move; Wherein, a first core-pulling shaft matching the fourth through hole is installed on the outer side of the fourth carrier plate, a second core-pulling shaft matching the first through hole is installed on the upper side of the seventh carrier plate, a fourth core-pulling shaft matching the second through hole is installed on the upper side of the sixth carrier plate, and a third core-pulling shaft matching the third through hole is installed on the front side of the sixth carrier plate; At least one fourth touch switch and at least one fourth suction cup are further arranged on the front side of the sixth carrier board, a fifth touch switch is arranged on the upper side of the sixth carrier board, a plurality of first touch switches and a plurality of first suction cups are arranged on the outer side of the fourth carrier board, a third touch switch and a third suction cup are arranged on the upper side of the seventh carrier board and / or the upper side of the fourth carrier board, and the upper side of the fourth carrier board is flush with the upper side of the seventh carrier board; The device further comprises a third carrier plate, the third carrier plate is connected to the second Y-axis motor, the fourth carrier plate is fixedly connected to the third carrier plate, the third carrier plate is located at the rear side of the second carrier plate, and at least one second touch switch and at least one second suction cup are arranged at the rear side of the third carrier plate; The mounting plate is provided with a third Y-axis motor, and the mounting direction of the third Y-axis motor is the same as that of the first Y-axis motor. The second carrier plate is also provided with a fourth Y-axis motor, and the mounting direction of the fourth Y-axis motor is the same as that of the second Y-axis motor. The positioning assembly also includes: a first carrier plate, the first carrier plate being located in front of the sixth carrier plate, the third Y-axis motor being used to drive the first carrier plate to move, the first carrier plate being provided with a pressing arm, the pressing arm being capable of rotating in a front-to-back direction, and when the pressing arm is in a downward pressing state, the pressing arm abuts against the lower front plate; The fifth carrier plate is located at the rear side of the third carrier plate, the fourth Y-axis motor is used to drive the fifth carrier plate to move, the fifth carrier plate is provided with a flip motor and a telescopic arm, the flip motor is used to drive the telescopic arm to rotate along the front and rear directions, and the telescopic arm can be pressed against the upper side of the front plate.

2. The welding fixture for the common box type ring main unit according to claim 1 is characterized in that: The flip motor is connected to the fifth Y-axis motor, and the fifth Y-axis motor is used to drive the telescopic arm to extend and retract. A plurality of elastic columns are arranged on the lower side of the telescopic arm, and a fifth through hole is arranged at the end of the telescopic arm away from the fifth carrier plate. A positioning stud is arranged at the end of the pressing arm away from the first carrier plate. When the pressing arm is in a downward pressing state and the telescopic arm is in a state of being extended to its longest position, the positioning stud is inserted into the fifth through hole.

3. A welding method for a common box type ring main unit, characterized in that: A host computer applied to a welding system, the welding system further comprising a welding arm and a welding fixture of the common box type ring main unit according to claim 2, the host computer being communicatively connected with the welding arm and the welding fixture, the welding method comprising: Obtain the number of boxes in total and the target model of the target circuit breaker based on the configuration interface; Determine a first distance based on a preset unit box width and the number of boxes in total, generate a first movement instruction based on half of the first distance, and send the first movement instruction to two X-axis motors respectively, wherein the unit box width is used to indicate the box width required for a single circuit breaker; Determine the box height and the side panel positioning distance based on the target model, generate a second movement instruction based on the side panel positioning distance, generate a third movement instruction based on the box height, send the second movement instruction to the second Y-axis motor, and send the third movement instruction to the first Y-axis motor, wherein the side panel positioning distance is used to indicate the Y-axis distance between the fourth through hole of the side panel and the second Y-axis motor; The side plate is fixed to the side of the welding jig based on the first mandrel pulling shaft and the fourth through hole, the front plate is fixed to the upper side of the welding jig based on the second mandrel pulling shaft and the first through hole, the bottom plate is fixed to the front side of the welding jig based on the third mandrel pulling shaft and the third through hole, and the lower front plate is fixed between the front plate and the bottom plate based on the fourth mandrel pulling shaft and the second through hole; The welding arm is controlled to weld the side plate and the lower front plate in sequence.

4. The welding method of the common box type ring main unit according to claim 3 is characterized in that: Generating a first movement instruction based on half of the first distance includes: Acquire a preset first reference distance, wherein the first reference distance is used to indicate a minimum distance between the X-axis motor and the fourth carrier plate; Acquire an extension length of the X-axis motor, wherein the extension length is used to indicate a distance that the mounting plate has moved in a direction away from the X-axis motor; A first moving distance is obtained by subtracting the first reference distance and the extension length in sequence from half of the value of the first distance, and the first moving instruction is generated based on the first moving distance.

5. The welding method of the common box type ring main unit according to claim 3 is characterized in that: Determining a box height and a side panel positioning distance based on the target model, generating a second movement instruction based on the side panel positioning distance, and generating a third movement instruction based on the box height, including: Obtaining a preset second reference distance, a third reference distance, and a fourth reference distance, wherein the second reference distance is used to indicate the minimum Y-axis distance between the second Y-axis motor and the first core-pulling shaft, the third reference distance is used to indicate the minimum Y-axis distance between the first Y-axis motor and the third core-pulling shaft, and the fourth reference distance is used to indicate the Y-axis distance between the first Y-axis motor and the second Y-axis motor; Obtaining a preset mapping table, and obtaining the box height, the side panel positioning distance, and the through-hole reference distance from the preset mapping table based on the target model, wherein the through-hole reference distance is used to indicate the distance between the fourth through-hole and the rear end of the side panel, and the preset mapping table records the distance information corresponding to the circuit breaker model; determining a difference between the side plate positioning distance and the second reference distance as a second moving distance, and generating the second moving instruction based on the second moving distance; The third moving distance is obtained by sequentially subtracting the second moving distance, the third reference distance, the fourth reference distance and the through-hole reference distance from the box height, and the third moving instruction is generated based on the third moving distance.

6. The welding method of the common box type ring main unit according to claim 5 is characterized in that: The ring main unit also includes a rear plate, the side plate is fixed to the side of the welding jig based on the first core pulling shaft and the fourth through hole, the front plate is fixed to the upper side of the welding jig based on the second core pulling shaft and the first through hole, the bottom plate is fixed to the front side of the welding jig based on the third core pulling shaft and the third through hole, and the lower front plate is fixed between the front plate and the bottom plate based on the fourth core pulling shaft and the second through hole, including: When a trigger signal of the first touch switch is detected, the first core-pulling shaft is controlled to switch to an extended state, and the first suction cup is activated to suck the side plate tightly to the outer side of the fourth carrier plate; When a trigger signal of the second touch switch is detected, the second suction cup is activated to suck the rear plate tightly onto the rear side of the third carrier plate; When a trigger signal of the third touch switch is detected, the second core-pulling shaft is controlled to switch to an extended state, and the third suction cup is activated to suck the front plate tightly onto the upper sides of the seventh carrier plate and the fourth carrier plate; When a trigger signal of the fourth touch switch is detected, the third core-pulling shaft is controlled to switch to an extended state, and the fourth suction cup is activated to suck the bottom plate tightly to the front side of the sixth carrier plate; When the trigger signal of the fifth touch switch is detected, the fourth core-pulling shaft is controlled to switch to the extended state.

7. The welding method of the common box type ring main unit according to claim 6 is characterized in that: Before controlling the welding arm to weld the side plate and the lower front plate in sequence, the method further includes: Acquire a fifth reference distance and a sixth reference distance based on the preset mapping table, and acquire a preset seventh reference distance, wherein the fifth reference distance is used to indicate the Y-axis distance between the fourth Y-axis motor and the second Y-axis motor, and the sixth reference distance is used to indicate the Y-axis distance between the first Y-axis motor and the third Y-axis motor; A fourth moving distance is obtained by subtracting the fifth reference distance from the side plate positioning distance and adding the through hole reference distance, and the fourth Y-axis motor is controlled to move the fifth carrier plate based on the fourth moving distance, and the telescopic arm is rotated to be parallel to the seventh carrier plate by the flip motor; Based on the sum of the sixth reference distance, the third moving distance and the seventh reference distance, the third Y-axis motor is controlled to move the first carrier plate, and the pressing arm is controlled to rotate and press against the lower front plate; The fifth Y-axis motor is started, and when it is detected that the positioning stud is inserted into the fifth through hole, the operation of the fifth Y-axis motor is stopped.

8. The welding method of the common box type ring main unit according to claim 7 is characterized in that: Controlling the welding arm to weld the side plate and the lower front plate in sequence includes: Control the welding arm to weld the joints of the two side panels and the front panel in sequence, and remove the welding arm after completion; Control the fifth Y-axis motor to retract the telescopic arm, control the flip motor to rotate the telescopic arm to be parallel to the rear plate, and control the fifth carrier plate to move in a direction away from the rear plate through the fourth Y-axis motor; Controlling the welding arm to weld the joints between the two side panels and the lower front panel, and the joints between the two side panels and the bottom panel; The clamping arm is removed and the welding of the remaining joints is completed.

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