Photovoltaic module junction box lead wire welding detector and its detection method

Abstract

The present invention discloses a lead welding detection machine for a photovoltaic module and its detection method, which relates to the field of photovoltaic equipment. It includes a frame, a conveyor line, and a detection module. The detection module includes a motion mechanism, an appearance detection mechanism, and a wire picking mechanism. The appearance detection mechanism is used to take pictures and detect the welding parts of the leads. The wire picking mechanism includes a claw for hooking the leads, a pressure sensor, and a driving component. The wire picking mechanism also includes a displacement sensor for detecting the lifting displacement of the claw. The driving component is used to stop rising when the value of the pressure sensor reaches a set value. By setting the initial pressure value and the maximum pressure value through the added pressure sensor, the pressure sensor is used to monitor the leads picked up by clamping in real time. When the strength of the picking mechanism in rising and picking up the leads reaches the set maximum value, the driving component is stopped from running, preventing the situation that the leads are deformed due to excessive force or not lifted due to too little force, and improving the accuracy of the lead welding detection.

Description

Technical Field

[0001] The present invention relates to the field of photovoltaic equipment, and particularly to a lead welding detector for a photovoltaic module junction box and its detection method. Background Art

[0002] As an important component of a solar cell module, a photovoltaic junction box is a connector between a solar cell array composed of solar cell modules and a solar cell charging control device. The main function of the photovoltaic junction box is to export the electric energy generated by the solar cell module through a cable. Inside the junction box, the current generated by the solar photovoltaic module is led out through a terminal and a connector and introduced into an electrical device.

[0003] The prior art patent number CN220690432 U discloses a welding detector for a photovoltaic module junction box, including a vision mechanism and a pressing and clamping mechanism. The pressing and clamping mechanism includes a pressing unit and a clamping unit. The pressing unit includes a pressing block, a connecting rod, and a pressing floating component, and the lead is pressed by the bottom end surface of the pressing block; the clamping unit includes a lifting cylinder, a clamping floating component, and a clamping jaw component, and the clamping jaw component moves in the lead clamping direction through the lifting cylinder and the clamping floating component.

[0004] The above prior art has the following problems in actual use: When the clamping unit clamps the lead, the lead is lifted by the upward movement of the lifting cylinder, and the lifting height cannot be judged, so that the lead may bear an excessive lifting force, resulting in the situation that the originally qualified lead is warped and damaged or the unqualified lead is not warped. Summary of the Invention

[0005] In order to overcome the above defects of the prior art, the present invention provides a lead welding detector for a photovoltaic module junction box to solve the problems in the above background art.

[0006] The present invention provides the following technical solution: A lead welding detector for a photovoltaic module junction box;

[0007] Including:

[0008] A frame;

[0009] A conveyor line for conveying the junction box;

[0010] A detection module, including a motion mechanism arranged on the frame and an appearance detection mechanism and a wire picking mechanism arranged on the output end of the motion mechanism. The motion mechanism is used to drive the appearance detection mechanism and the wire picking mechanism to move;

[0011] The appearance detection mechanism is used to take pictures and detect the welding part of the lead;

[0012] The thread picking mechanism includes a hook for hooking the lead, a pressure sensor and a drive assembly. The hook is installed on the output end of the drive assembly through the pressure sensor. The drive assembly is used to drive the hook to rise to pick up the lead. The thread picking mechanism also includes a displacement sensor for detecting the lifting and lowering displacement of the hook. The drive assembly is used to stop rising when the value of the pressure sensor reaches a set value.

[0013] Beneficial effect: The initial pressure value and the maximum pressure value are set by adding a pressure sensor, and the pressure sensor is used to monitor the clamped and picked up lead in real time when picking up the lead. When the strength of the lifting mechanism to lift the lead reaches the set maximum value, the drive component stops running to prevent the lead from being deformed due to excessive force or not being lifted up due to insufficient force, thereby improving the accuracy of lead welding detection.

[0014] Preferably, the driving assembly includes an R-axis motor and a driving unit, the driving unit is assembled at the output end of the R-axis motor, the driving unit includes a vertical stepping module and a horizontal stepping module, the vertical stepping module and the horizontal stepping module are arranged vertically, and the pressure sensor is arranged at the free end of the horizontal stepping module.

[0015] Through the above-mentioned technical means, the R-axis motor is connected to the drive unit, and the angle of the clamp is adjusted according to the appearance detection mechanism so that the hook can be aligned with the tilted photovoltaic module panel, thereby greatly improving the practicality of the hook clamping.

[0016] Preferably, the number of the hooks, pressure sensors and drive units is four, and the four hooks are installed on different drive components through the pressure sensors, and two of the hooks cooperate to grab and lift a lead wire.

[0017] Preferably, the conveyor line includes a crossbeam installed inside a frame and a plurality of conveyor belts detachably installed on the crossbeam. The plurality of conveyor belts are arranged transversely, and a transmission shaft passes through the same end of the conveyor belts, and a conveying motor is connected to one end of the transmission shaft.

[0018] Through the above-mentioned technical means, multiple conveyor belts are connected through a transmission shaft, so that multiple conveyor belts can be synchronously operated by one driving source, reducing the use of driving sources and thus reducing production costs.

[0019] Preferably, two groups of positioning components are provided on the conveyor line, and the two groups of positioning components are respectively slidably placed on the bottom of the beam and the side of the conveyor line through linear operation modules.

[0020] Preferably, the positioning assembly comprises two platforms that move relative to each other and are arranged on the linear motion mechanism, and at least two positioning wheels are vertically mounted on each platform.

[0021] Through the above technical means, two groups of positioning wheels are used to position the four sides of the photovoltaic module, preventing the photovoltaic module from tilting, improving the accuracy of detection, and strengthening the stability of the photovoltaic module on the conveyor line. It effectively prevents the position deviation of the photovoltaic module caused by the lifting force when lifting the lead wire, and improves the stability in the conveying and lifting states.

[0022] Preferably, the motion mechanism includes a transverse movement module, a frame, and a three-axis motion module. The frame is on the top of the transverse movement module and reciprocates left and right inside the frame following the transverse movement module. The three-axis motion module is placed on the frame.

[0023] Preferably, the three-axis motion module is composed of an X-axis motion unit, a Y-axis motion unit, and a Z-axis motion unit. The X-axis motion unit is meshed and assembled on the top of the frame. The Y-axis motion unit is meshed and assembled on the top of the X-axis motion unit. The Z-axis motion unit is assembled at the free end of the Y-axis motion unit. The appearance detection mechanism and the wire picking mechanism are respectively assembled on the front and back of the Z-axis motion unit.

[0024] Preferably, the appearance detection mechanism includes a camera, a lens, and a light source. The camera, the lens, and the light source are arranged in sequence from top to bottom on the Z-axis motion unit.

[0025] A detection method for the welding of the lead wire of the junction box of a photovoltaic module includes the following steps:

[0026] S1. Perform a primary photo detection on the lead wire welding part of the junction box on the conveyor line through the appearance detection mechanism. If the solder joint length value is greater than or equal to the set solder joint length standard value, it is judged as qualified;

[0027] S2. Perform a strength detection on the lead wire qualified in S1 through the wire picking mechanism. After the claw hooks the lead wire and moves upward, when the value of the pressure sensor reaches the set initial pressure value A, record the value X of the current position through the displacement sensor, and continue to move. When the value of the pressure sensor reaches the set maximum pressure value B, stop moving, and record the current position value Y. When Y - X > the Z standard value, it is judged as unqualified, otherwise it is judged as qualified; if the driving component moves upward to the limit position and the value of the pressure sensor fails to reach the set initial pressure value A, it is judged as unqualified;

[0028] S3. Perform a secondary photo detection on the lead wire qualified in S2. If the solder joint length value is greater than or equal to the set solder joint length standard value, it is judged as qualified. Description of the Drawings

[0029] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0030] Figure 2 It is a schematic diagram of the conveying and positioning of the photovoltaic module of the present invention.

[0031] Figure 3 It is a schematic top view structure diagram of the conveyor line of the present invention.

[0032] Figure 4 It is a schematic bottom view structure diagram of the conveyor of the present invention.

[0033] Figure 5 It is a schematic structure diagram of the motion mechanism of the present invention.

[0034] Figure 6 It is a schematic assembly structure diagram of the appearance detection device and the thread picking mechanism of the present invention.

[0035] Figure 7 It is a schematic structure diagram of the three-axis motion module of the present invention.

[0036] Figure 8 It is a schematic structure diagram of the appearance detection device of the present invention.

[0037] Figure 9 It is a schematic structure diagram of the thread picking mechanism of the present invention.

[0038] Figure 10 It is a schematic connection diagram of the pressure sensor and the claw of the present invention.

[0039] The reference numerals are: 1, frame; 2, conveyor line; 21, cross beam; 22, conveyor belt; 23, transmission shaft; 24, conveyor motor; 3, cross movement module; 4, frame; 5, three-axis motion module; 51, X-axis motion unit; 52, Y-axis motion unit; 53, Z-axis motion unit; 6, appearance detection mechanism; 61, camera; 62, lens; 63, light source; 7, thread picking mechanism; 71, claw; 72, pressure sensor; 73, drive assembly; 731, R-axis motor; 732, drive unit; 7321, vertical stepping module; 7322, horizontal stepping module; 74, displacement sensor; 8, positioning assembly; 81, platform; 82, positioning wheel. Detailed implementation manners

[0040] The following elaborates on the preferred embodiments of the present invention in conjunction with the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making the protection scope of the present invention more clearly defined.

[0041] The present invention provides a welding detection machine for the leads of a photovoltaic module junction box;

[0042] Example 1, as Figure 1-10 shown, provides a welding detection machine for the leads of a photovoltaic module junction box, including a frame 1, a conveyor line 2, and a detection module.

[0043] At the bottom of the front end of the frame 1, there is a feeding port for photovoltaic modules. This feeding port is used for both the entry and removal of photovoltaic modules. The conveyor line 2 is arranged inside the frame 1 and aligned with the feeding port for handling photovoltaic modules.

[0044] The detection module includes a motion mechanism arranged on the frame 1, and an appearance detection mechanism 6 and a wire picking mechanism 7 arranged at the output end of the motion mechanism. The motion mechanism is used to drive the appearance detection mechanism 6 and the wire picking mechanism 7 to move. The appearance detection mechanism 6 and the wire picking mechanism 7 are symmetrically arranged on the motion mechanism.

[0045] The appearance detection mechanism 6 is used to take pictures and detect the welding parts of the leads.

[0046] The wire picking mechanism 7 includes a claw 71 for hooking the lead, a pressure sensor 72, and a driving component 73. The claw 71 is installed at the output end of the driving component 73 through the pressure sensor 72. The driving component 73 is used to drive the claw 71 to rise to pick up the lead. The wire picking mechanism 7 also includes a displacement sensor 74 for detecting the lifting displacement of the claw 71. The driving component 73 is used to stop rising when the value of the pressure sensor 72 reaches the set value.

[0047] During detection, the following steps are included:

[0048] S1. Use the appearance detection mechanism 6 to take a first picture and detect the welding part of the lead of the junction box on the conveyor line 2. If the solder joint length value is greater than or equal to the set solder joint length standard value, it is judged as qualified;

[0049] S2. Use the wire picking mechanism 7 to perform strength detection on the leads qualified in S1. After the claw 71 hooks the lead and moves upward, when the value of the pressure sensor 72 reaches the set initial pressure value A, record the value X of the current position through the displacement sensor 74, and continue to move. When the value of the pressure sensor 72 reaches the set maximum pressure value B, stop moving and record the value Y of the current position. When Y - X > the Z standard value, it is judged as unqualified, otherwise it is judged as qualified; if when the driving component 73 moves upward to the limit position, the value of the pressure sensor 72 fails to reach the set initial pressure value A, it is judged as unqualified;

[0050] S3. Use the appearance detection mechanism 6 again to take a second picture and detect the leads qualified in S2. If the solder joint length value is greater than or equal to the set solder joint length standard value, it is judged as qualified.

[0051] The initial pressure value and the maximum pressure value are set through the added pressure sensor 72. When picking up the lead wire, the pressure sensor 72 is used to monitor the clamped and picked-up lead wire in real time. When the strength of the picking-up mechanism rising to pick up the lead wire reaches the set maximum value, the driving component 73 is stopped from running, preventing the situation that the lead wire is deformed due to excessive force or not lifted due to insufficient force, and improving the accuracy of lead wire welding detection.

[0052] In this embodiment, the driving component 73 includes an R-axis motor 731 and a driving unit 732. The driving unit 732 is assembled at the output end of the R-axis motor 731. The driving unit 732 includes a vertical stepping module 7321 and a horizontal stepping module 7322. The vertical stepping module 7321 and the horizontal stepping module 7322 are arranged perpendicular to each other. The pressure sensor 72 is arranged at the free end of the horizontal stepping module 7322.

[0053] The R-axis motor 731 can rotate to drive the angle of the driving unit 732, making the driving unit 732 correspond to the lead wire and clamp and lift it. Using the R-axis motor 731, the driving unit 732 can be aligned with the inclined lead wire of the junction box, greatly improving the practicability of the fixture. When clamping, the vertical stepping module 7321 pushes down the horizontal stepping module 7322. At this time, the horizontal stepping module 7322 pushes out the pressure sensor 72 and the claw 71, enabling the two claws 71 to cooperate to clamp the lead wire, and then performing a lifting process. And when lifting, the pressure sensor 72 monitors the strength of the lead wire.

[0054] In this implementation, as Figure 2 shown, the conveyor line 2 includes a cross beam 21 installed inside the frame 1 and a plurality of conveyor belts 22 detachably installed on the cross beam 21. The plurality of conveyor belts 22 are arranged horizontally, and a transmission shaft 23 penetrates through the same end of the conveyor belts 22. One end of the transmission shaft 23 is connected with a conveyor motor 24. The operation of the plurality of conveyor belts 22 can be achieved through one transmission shaft 23 and is controlled by the conveyor motor 24, reducing the use of the drive source and thus reducing the production cost.

[0055] In this implementation, as Figure 3 、 4 shown, two groups of positioning components 8 are arranged on the conveyor line 2. The two positioning components 8 are respectively placed at the bottom of the cross beam 21 and on the side of the conveyor line 2 by sliding through a linear motion module. Among them, the positioning component 8 includes two relatively moving platforms 81 arranged on the linear motion mechanism, and at least two positioning wheels 82 are vertically installed on each platform 81.

[0056] Further, the linear motion module includes a servo motor, a pulley, a belt, a connecting block, and a linear guide rail. The belt is arranged at the bottom of the cross beam 21 and the side of the conveyor belt 22, so that the two belts form a cross shape. The connecting blocks are arranged diagonally with respect to the center line of the belt. The servo motor is used to drive the pulley to drive the belt to run. The running belt drives the two connecting blocks to move relatively synchronously. The platform 81 is connected to the connecting block on the linear guide rail, and the running belt makes the platforms 81 at both ends approach or move away from each other, so that the positioning wheels 82 are in contact with the photovoltaic module, position and align the four sides of the photovoltaic module, make the photovoltaic module located at the middle position of the conveying line 2, and the abutted positioning wheels 82 prevent the photovoltaic module from tilting, improve the accuracy of detection, and reinforce the stability of the photovoltaic module on the conveying line, effectively preventing the position deviation of the photovoltaic module caused by the lifting force when lifting the lead wire, and improving the stability in the conveying and lifting states.

[0057] In this embodiment, as Figure 5 shown, the motion mechanism includes a crosswise movement module 3, a frame 4, and a three-axis motion module 5. The frame 4 is on the top of the crosswise movement module 3 and reciprocates left and right inside the frame 1 following the crosswise movement module 3. The three-axis motion module 5 is placed on the frame 4.

[0058] Among them, the three-axis motion module 5 includes an X-axis motion unit 51, a Y-axis motion unit 52, and a Z-axis motion unit 53. The X-axis motion unit 51 is meshed and assembled on the top of the frame 4 to move in the front-back direction inside the frame. The Y-axis motion unit 52 is meshed and assembled on the top of the X-axis motion unit 51 to move in the left-right direction inside the frame. The Z-axis motion unit 53 is assembled at the free end of the Y-axis motion unit 52 to move in the up-down direction inside the frame. The appearance detection mechanism 6 and the wire picking mechanism 7 are respectively assembled on the front and back of the Z-axis motion unit 53.

[0059] Further, as Figure 6 、 Figure 7 shown, both the X-axis motion unit 51 and the Y-axis motion unit 52 adopt the mode of a servo motor, a gear, a rack cooperating with a guide rail to move, and the Z-axis motion unit 53 adopts the mode of a servo motor, a lead screw cooperating with a guide rail to run.

[0060] In this embodiment, as Figure 8 shown, the appearance detection mechanism 6 includes a camera 61, a lens 62, and a light source 63. The light source 63 supplements light for the welded lead wire, and the camera 61 and the lens 62 are used to take pictures and position the position of the lead wire welding. At the same time, it is judged whether the welding is qualified according to whether there is obvious damage to the appearance shape of the welded lead wire.

[0061] The working process and principle of this embodiment:

[0062] The conveyor motor 24 drives the transmission shaft 23 to rotate, causing multiple conveyor belts 22 to run synchronously to convey the photovoltaic modules with welded junction boxes until the photovoltaic modules completely enter the inside of the frame 1. At this time, the linear motion module drives the platforms 81 at both ends to approach each other until the positioning wheels 82 contact the sides of the photovoltaic modules, positioning and fixing the four sides of the photovoltaic modules;

[0063] Subsequently, the motion mechanism moves the appearance detection mechanism 6 to the position of the junction box, and judges whether the length of the welding point of the welding lead of the junction box is qualified by detecting the length of the welding point of the welding lead of the junction box through the camera 61, lens 62 and light source 63 set in the appearance detection mechanism 6;

[0064] When the length of the lead welding point is unqualified, it is removed from the frame 1 by the conveyor belt 22;

[0065] When the length of the lead welding point is qualified, the wire picking mechanism 7 is moved to the lead welding position of the junction box according to the positioning image of the appearance detection mechanism 6 through the transverse movement module 3, X-axis movement unit 51, Y-axis movement unit 52, and Z-axis movement unit 53. At this time, the vertical stepping module 7321 pushes down the transverse stepping module 7322. At this time, the transverse stepping module 7322 pushes out the pressure sensor 72 and the hook 71, so that the two hooks 71 cooperate to clamp the lead, and then perform a lifting process;

[0066] When the value of the pressure sensor 72 reaches the set initial pressure value A, the value X of the current position is recorded by the displacement sensor 74, and continue to move. When the value of the pressure sensor 72 reaches the set maximum pressure value B, stop moving and record the current position value Y. When Y - X > the Z standard value, it is judged as unqualified, otherwise it is judged as qualified; if the driving component 73 moves up to the limit position and the value of the pressure sensor 72 fails to reach the set initial pressure value A, it is judged as unqualified;

[0067] The leads with unqualified strength are removed from the frame 1 by the conveyor belt 22, and the leads with qualified strength are subjected to secondary photographing detection. If the solder joint length value is greater than or equal to the set solder joint length standard value, it is judged as qualified.

[0068] Embodiment 2 is different from Embodiment 1 in that the number of the hooks 71, pressure sensors 72, and driving units 732 is four. The four hooks 71 are all installed on different driving components 73 through the pressure sensors 72. Two of the hooks 71 cooperate to jointly grab and lift a lead. The four hooks 71 do not affect each other. Two of the hooks 71 cooperate to jointly grab and lift a lead, and two leads can be detected synchronously, improving the detection efficiency.

[0069] Embodiment 3 is different from Embodiment 1 in that the positioning component 8 includes a stop block and a suction cup. The stop block is arranged at the end of the conveyor line 2, and the suction cup is arranged at the bottom of the conveyor line 2. When the conveyor line 2 finishes transporting the photovoltaic module, the stop block is used for blocking and positioning, and then the suction cup is used to adsorb and fix the bottom of the photovoltaic module to prevent the position deviation of the photovoltaic module caused by the lifting force when lifting the lead wire.

[0070] The following points should be noted: First, in the description of the present application, it should be noted that unless otherwise specified and defined, the terms "installation", "connection", and "connection" should be understood in a broad sense, which can be mechanical connection or electrical connection, or the communication inside two components, and can be directly connected. "Up", "down", "left", "right", etc. are only used to represent the relative position relationship. When the absolute position of the described object changes, the relative position relationship may change;

[0071] The above is only the preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiment. Any equivalent modification or change made by those of ordinary skill in the art according to the disclosure of the present invention should be included in the protection scope recorded in the claims.

Claims

1. Photovoltaic module junction box lead welding detection machine, characterized in that: include: Rack(1); A conveyor line (2) for conveying the junction box; The detection module comprises a motion mechanism disposed on a frame (1) and an appearance detection mechanism (6) and a thread taking-up mechanism (7) disposed on an output end of the motion mechanism, wherein the motion mechanism is used to drive the appearance detection mechanism (6) and the thread taking-up mechanism (7) to move; The appearance inspection mechanism (6) is used to take photos of the welding parts of the leads for inspection; The thread picking mechanism (7) comprises a hook claw (71) for hooking a lead wire, a pressure sensor (72) and a drive assembly (73); the hook claw (71) is mounted on an output end of the drive assembly (73) via the pressure sensor (72); the drive assembly (73) is used to drive the hook claw (71) to rise so as to pick up the lead wire; the thread picking mechanism (7) further comprises a displacement sensor (74) for detecting the lifting displacement of the hook claw (71); the drive assembly is used to stop rising when the value of the pressure sensor reaches a set value.

2. The photovoltaic module junction box lead welding detection machine according to claim 1 is characterized in that: The driving assembly (73) comprises an R-axis motor (731) and a driving unit (732), wherein the driving unit (732) is mounted on the output end of the R-axis motor (731), and the driving unit (732) comprises a vertical stepping module (7321) and a horizontal stepping module (7322), wherein the vertical stepping module (7321) and the horizontal stepping module (7322) are arranged vertically, and the pressure sensor (72) is arranged at the free end of the horizontal stepping module (7322).

3. The photovoltaic module junction box lead welding detection machine according to claim 2 is characterized in that: The number of the hook claws (71), the pressure sensor (72), and the drive unit (732) are all four, and the four hook claws (71) are installed on different drive components (73) through the pressure sensor (72), and two of the hook claws (71) cooperate to grab and lift a lead wire.

4. The photovoltaic module junction box lead welding detection machine according to claim 1, 2 or 3, characterized in that: The conveyor line (2) comprises a crossbeam (21) mounted inside the frame (1) and a plurality of conveyor belts (22) detachably mounted on the crossbeam (21), wherein the plurality of conveyor belts (22) are arranged transversely and a transmission shaft (23) passes through the same end of the conveyor belts (22), and a conveying motor (24) is connected to one end of the transmission shaft (23).

5. The photovoltaic module junction box lead welding detection machine according to claim 4, characterized in that: Two groups of positioning components (8) are provided on the conveyor line (2), and the two groups of positioning components (8) are respectively slidably placed on the bottom of the crossbeam (21) and the side of the conveyor line (2) through a linear operation module.

6. The photovoltaic module junction box lead welding detection machine according to claim 5, characterized in that: The positioning assembly (8) comprises two platforms (81) arranged on a linear motion mechanism and capable of relatively moving, and at least two positioning wheels (82) are vertically mounted on each platform (81).

7. The photovoltaic module junction box lead welding detection machine according to claim 1, 2 or 3, characterized in that: The motion mechanism comprises a transverse movement module (3), a frame (4) and a three-axis motion module (5); the frame (4) is on top of the transverse movement module (3) and follows the transverse movement module (3) to reciprocate left and right inside the frame (1); and the three-axis motion module (5) is placed on the frame (4).

8. The photovoltaic module junction box lead welding detection machine according to claim 7, characterized in that: The three-axis motion module (5) comprises an X-axis motion unit (51), a Y-axis motion unit (52), and a Z-axis motion unit (53); the X-axis motion unit (51) is meshed and assembled on the top of the frame (4); the Y-axis motion unit (52) is meshed and assembled on the top of the X-axis motion unit (51); the Z-axis motion unit (53) is assembled on the free end of the Y-axis motion unit (52); and the appearance detection mechanism (6) and the thread picking mechanism (7) are respectively assembled on the front and rear of the Z-axis motion unit (53).

9. The photovoltaic module junction box lead welding detection machine according to claim 8, characterized in that: The appearance detection mechanism (6) comprises a camera (61), a lens (62) and a light source (63), and the camera (61), the lens (62) and the light source (63) are arranged in sequence from top to bottom on the Z-axis motion unit (53).

10. A method for detecting welding of lead wires in a photovoltaic module junction box, characterized in that: The photovoltaic module junction box lead welding detection machine according to any one of claims 1 to 9 comprises the following steps: S1. Use the appearance inspection mechanism (6) to take a photo inspection of the lead welding part of the junction box on the conveyor line (2). If the welding point length value is greater than or equal to the set welding point length standard value, it is judged to be qualified; S2. The wire that has passed the test in S1 is subjected to strength test by the wire picking mechanism (7). The hook hooks the wire and moves upward. When the value of the pressure sensor reaches the set initial pressure value A, the displacement sensor records the value X of the current position and continues to move. When the value of the pressure sensor reaches the set maximum pressure value B, the movement stops and the value Y of the current position is recorded. When YX>Z standard value, it is judged as unqualified, otherwise it is judged as qualified. If the value of the pressure sensor fails to reach the set initial pressure value A when the driving component (73) moves upward to the limit position, it is judged as unqualified. S3. Perform a second photo inspection on the qualified leads in S2, and judge them as qualified if the solder joint length value is greater than or equal to the set solder joint length standard value.

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