Junction box cover assembly process and assembly equipment

Abstract

The application relates to a box cover assembly process and equipment of a junction box, which comprises the following steps: S1, feeding of the box cover; S2, feeding of an assembly; and S3, buckle assembly. In one aspect, based on shaking and overturning of the box cover, the selection rate of taking is increased, the error rate of taking is reduced, the feeding efficiency is improved, meanwhile, in the checking and correcting, the box cover is kept aligned and positioned on the transfer platform with consistent front and back surfaces, and the interruption rate of feeding is reduced. In another aspect, based on the curing degree detection of the sealing glue layer, the gluing and buckling are implemented in the set curing degree, the light source is assisted, the box cover assembly quality is improved, and the glue overflow rate is reduced.

Description

Technical Field

[0001] This invention belongs to the field of photovoltaic module assembly, specifically relating to a junction box cover assembly process and assembly equipment. Background Technology

[0002] A photovoltaic module junction box basically consists of a box body and a cover. The box body is fixed to the module by adhesive. After the internal components and busbars of the junction box are assembled, the cover is used to close the box body by applying adhesive and snapping together. The opening formed by the box body is basically rectangular. Therefore, the cover used is rectangular module-shaped. During the assembly process, the cover not only has long and short sides, but also a front and back. Therefore, the following technical defects often exist in the automated assembly process: 1) In the automatic feeding of the box cover, due to the probability of the box cover itself piling up or relatively jamming (such as two jamming together) during the transmission process, there is still a probability of over-feeding when picking up materials. This not only increases the probability of damage to the junction box or internal components in subsequent assembly, but also significantly increases the wear and tear of the box cover. At the same time, since the layout of the box cover in the material box is disordered, the continuous transmission method is used for continuous feeding. However, it is impossible to guarantee that the adsorption point is in the center every time during the adsorption process. Therefore, even if the front and back and long and short sides requirements are met, the adsorption point position deviation cannot be effectively transferred and aligned. Therefore, the box cover needs to be sent back to the material box for re-picking, which causes the feeding interruption and reduces the assembly efficiency. In addition, if there are multiple junction boxes for the same photovoltaic module, the material needs to be picked up at once, which greatly increases the probability of the material not being aligned. Moreover, the electrostatic adsorption between the box covers themselves also increases the difficulty of picking up materials. 2) In the automatic assembly of the box lid, it is necessary to apply glue to the surface of the box and wait until the glue is close to the cured state before assembling the box lid. Otherwise, the glue will overflow after assembly due to the glue not being dry, which will affect the bonding quality. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide a brand-new assembly process for the junction box cover.

[0004] In addition, the present invention also relates to a junction box cover assembly device.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: a junction box cover assembly process, which includes the following steps: S1, Loading the box lid First, the lids are dispersed and spread in the receiving box using a vibration-shaking method. Second, based on vision, negative pressure is used to pick up lids with similar orientations and identical front faces one by one, and the position of the lids is checked and the negative pressure is adjusted for multiple lids with the same orientation. Finally, the picked-up lids are transferred to the transfer platform for alignment and straightening. S2, Component loading The component with the housing is moved into the assembly center with the housing surface facing upward and coated with a sealant layer. At the same time, a sealant detection probe is inserted into the depth of the sealant layer to obtain the degree of curing of the sealant layer. When the set degree of curing is reached, the sealant detection probe is reset. S3, Cover Assembly A robotic arm is used to pick up multiple box covers from the transfer platform and insert them one by one into the box body from one end or side. Then, the other end or side is fastened onto the surface of the box body. At the same time, with the assistance of a curing light source, the box cover is pressed flat and glued to the sealant layer.

[0006] Preferably, in step S1, the lids scattered in the receiving box are shaken and flipped based on vibration to reverse their front and back sides and orientation. This shaking increases the accuracy of the negative pressure robot in selecting the lids, thereby improving the feeding efficiency.

[0007] According to a specific embodiment and preferred aspect of the invention, the resulting vibration is a multi-angle overturning motion in the vertical direction; this overturning motion is more conducive to the rolling of the lid.

[0008] In some specific implementations, the brush on top of the receiving box sweeps stacked or excess box lids from the negative pressure adsorption head into the receiving box, reducing the error rate of box lid feeding. Simultaneously, the negative pressure adsorption head uses vision to deliver NG (non-compliant) box lids to the waste collection box.

[0009] According to another specific embodiment and preferred aspect of the present invention, in step S1, the verification method is based on the rotation of the adsorption position and the synchronous vertical movement of the adsorption position to shake off the stacked box covers or to remove box covers with incorrect adsorption positions by means of rotational collision of the adsorbed box covers, and to re-adsorb to form multiple box covers with similar adsorption positions, consistent orientation, and consistent front and back sides, which are then sent to the transfer platform. Verification based on multiple free movements improves the success rate of material feeding and reduces the interruption rate.

[0010] Preferably, during the verification process, every two adjacent adsorption positions move towards each other vertically while rotating. This results in a fast verification speed and relatively high accuracy.

[0011] According to another specific embodiment and preferred aspect of the present invention, the transfer platform in step S1 is provided with mounting stations corresponding one-to-one with the boxes on the components. The verified box covers are placed at each mounting station, and then the length and width directions of the box covers are aligned and corrected. This alignment and correction is based on the need for precise assembly.

[0012] Preferably, the alignment method uses the length and width directions of a lid as a reference for alignment, and simultaneously pushes multiple lids along their length and width directions to align them with the reference. Based on the bidirectional alignment reference, the synchronous pushing method allows for the simultaneous alignment and positioning of multiple lids.

[0013] According to another specific embodiment and preferred aspect of the present invention, in step S2, the adhesive detection probes used correspond one-to-one with the positions of the housing, and the degree of curing information is obtained based on the resistance encountered during the up-and-down insertion. The specific resistance can be set according to actual conditions.

[0014] In addition, each box is equipped with a curing light source at the top, which can quickly cure the adhesive during the bonding process, improving the quality of the box lid assembly.

[0015] Preferably, the box cover assembly process further includes step S4, in which the installation is checked for compliance using a vision camera and lighting compensation corresponding to each junction box.

[0016] Another technical solution of the present invention is: an assembly equipment used in the junction box cover assembly process as described above, which includes a cover feeding unit, a component feeding unit, a curing degree detection unit for the sealing adhesive layer on the box surface, an assembly robot, and an assembly auxiliary unit. The cover feeding unit includes a vibrating hopper, a vibrating material box, a feeding robot, and a transfer platform. The vibrating hopper can spread the cover relatively and vibrate it towards the outlet. The vibrating material box forms a multi-angle motion to tumble and spread the cover in all directions. The feeding robot sends the verified cover into the transfer platform for correction based on the XYZ axial motion. The verification is based on the rotation of the picking claw to form a first degree of freedom and the linear motion of the up-down misalignment of the picking claw to form a second degree of freedom. In the synchronous motion of the first and second degrees of freedom, the verification is based on whether the cover on each two adjacent picking claws moves and collides, and the movement of the picking claw to shake off excess or interlayer cover. And / or, the component feeding unit includes a conveyor belt forming a transmission channel and correction components arranged on both sides of the conveyor belt; And / or, the curing degree detection unit includes a detection probe that corresponds one-to-one with the box body and a curing power unit that drives the detection probe to rise and fall synchronously; And / or, the assembly robot includes a pick-up head with a suction box cover and an arm with multiple degrees of freedom of rotation and displacement; And / or, the assembly auxiliary unit includes a curing light source located at the top and corresponding to the box body, and a vision inspection component located on the side and corresponding to the box body.

[0017] Specifically, the rotation conditions of each picking claw's head around the Z-axis are set, the center distance between any two adjacent claw heads is equal and is D, and the length of each box cover is L, where L≤D≤1.8L. The first degree of freedom is formed by the rotation of the picking claw, and the second degree of freedom is formed by the linear motion of the picking claw's vertical misalignment. The verification basis is whether the box covers on any two adjacent picking claws collide, and whether the picking claws shake off excess or interlayer box covers based on their movement. The multiple picking claws that pass the verification are rotated to a parallel angle, and the box covers are fed to the transfer platform based on the X, Y, and Z axis movements.

[0018] Due to the implementation of the above technical solutions, the present invention has the following advantages compared with the prior art: In existing automatic lid feeding systems, the lids themselves may accumulate or jam during transport (e.g., two jammed together). This leads to a risk of over-feeding during assembly, increasing the likelihood of damage to the junction box or internal components and significantly increasing lid wear. Furthermore, the lids' irregular arrangement in the material box means that continuous feeding cannot guarantee a centered suction point each time. Therefore, even if the front / back and long / short side requirements are met, the suction point's position cannot be effectively corrected due to positional deviations. The existing system requires returning the junction box cover to the material box for re-retrieving, which interrupts the material supply and reduces assembly efficiency. In addition, if there are multiple junction boxes for the same photovoltaic module, the material needs to be picked up at once, which greatly increases the probability of the material not being properly organized. Moreover, the electrostatic adsorption between the junction boxes themselves also increases the difficulty of retrieving the material. Furthermore, in the automatic assembly of the junction box cover, glue needs to be applied to the surface of the box. The junction box cover can only be assembled when the glue is close to curing. Otherwise, the glue will overflow after assembly due to not being dry, which will affect the bonding quality. This application cleverly solves the various shortcomings of the existing structure by designing the junction box cover assembly process as a whole. After adopting the junction box cover assembly process, firstly, the cover is dispersed and spread on the receiving box using a vibration shaking method. Based on vision, negative pressure is used to adsorb cover with similar orientation and the same front face one by one, and the adsorption position of the cover is checked and the negative pressure is adjusted for multiple covers with the same orientation. Then, the adsorbed cover is transferred to the transfer platform for alignment. Next, the component with the box body is moved into the assembly center with the surface of the box body facing upward and coated with a sealant layer. At the same time, a sealant detection probe is inserted into the depth of the sealant layer to obtain the curing degree of the sealant layer, and the detection probe is reset at the set curing degree. Finally, a robotic arm is used to adsorb multiple cover on the transfer platform, and each cover is inserted into the box body from one end or one side, and then the other end or other side is fastened to the surface of the box body. At the same time, with the assistance of a curing light source, the cover is pressed flat and glued to the sealant layer. Therefore, this invention, on the one hand, increases the selection rate of the material to be picked up by shaking and flipping the lid during the feeding process, thereby reducing the error rate of picking up the material and improving the feeding efficiency. At the same time, during the verification and alignment process, the lid is positioned on the transfer platform with the front and back sides aligned, reducing the interruption rate of the feeding process. On the other hand, based on the curing degree detection of the sealant layer, the bonding and fastening are carried out within the set curing degree, and with the assistance of a light source, the assembly quality of the lid is improved and the glue overflow rate is reduced. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the junction box cover assembly equipment of Example 1; Figure 2 for Figure 1A partial structural diagram of the component (box lid feeding unit, curing degree detection unit, assembly robot, assembly auxiliary unit). Figure 3 for Figure 2 A partial structural diagram (box lid feeding unit); Figure 4 for Figure 3 Enlarged structural diagram of the transit platform; Figure 5 for Figure 3 A partial structural diagram (vibrating hopper, vibrating feed box). Figure 6 for Figure 3 Enlarged schematic diagram of the feeding robot in the diagram; Figure 7 for Figure 6 A cross-sectional view of a single material handling claw; Figure 8 for Figure 2 Enlarged schematic diagram of the intermediate curing degree detection unit; Figure 9 for Figure 2 Enlarged schematic diagram of the assembly robot arm; Figure 10 This is an enlarged schematic diagram of the structure of the vibrating hopper and vibrating box in Example 2; The components include: A) Box lid feeding unit; 1) Vibrating hopper; 10) Material seat; 11) Hopper; 12) First vibrator; 13) Interceptor plate; 14) Power unit; 2) Vibrating material box; 20) Receiving box; 200) Box frame; 201) Flexible box bottom layer; 202) Brush; 21) Second vibrator; 210) Vibrating rod; 22) Waste lid collection box; 3) Feeding robot; 31) Picking seat; 32) Transfer unit; 320) X-axis moving assembly; a1) First shaft seat; a2) First power component; I) Track; 321) Y-axis moving assembly; b1) Second axis b2, Second power component; b20, Transmission rack; b21, Travel gear; b22, Power motor; II, Track; 33, Picking claw; 330, Fixed seat; 331, Moving seat; 332, Negative pressure suction head; 333, Power unit; g, Guide rail; m, Pulley; 4, Transfer platform; 40, Fixed seat plate; 41, Long side grid; 42, Short side grid; 43, Short side straightening module; 430, Comb plate; 431, Comb power unit; 44, Long side straightening module; 440, Straightening grid bar; 441, Synchronous connecting rod; 442, Connecting rod power unit; B. Component feeding unit; B1. Conveyor belt; B2. Calibration component; C. Curing degree detection unit; C1. Adhesive detection probe; C2. Curing power unit; D. Assembly robot; D1. Material handling head; D2. Arm; E, Assembly auxiliary unit; E1, Curing light source; E2, Visual inspection component; e20, Visual camera; e21, Supplemental light. Detailed Implementation

[0020] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0021] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0022] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0023] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0024] In this invention, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0025] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation. Example 1

[0026] like Figures 1 to 9 As shown, the junction box cover assembly equipment of this embodiment includes a cover feeding unit A, a component feeding unit B, a curing degree detection unit C for the sealing adhesive layer on the box surface, an assembly robot D, and an assembly auxiliary unit E.

[0027] The box lid feeding unit A includes a vibrating hopper 1, a vibrating hopper 2, a feeding robot 3, and a transfer platform 4. Specifically, the vibrating hopper 1 includes a material base 10, a hopper 11 mounted on the material base 10, and a first vibrator 12, wherein the first vibrator 12 can spread the box lids relatively open and vibrate them towards the outlet. The hopper 11 is elastically mounted vertically on the material base 10, and the first vibrator 12 drives the hopper 11 to move up and down. The vibrating method is more conducive to the scattering and shaking off of the box lids. Furthermore, the vibrating hopper 1 also includes an interceptor plate 13 mounted on the material base 10 and capable of blocking the hopper 11, and a power unit 14 that drives the interceptor plate 13 to move up and down, wherein the interceptor plate 13 can move synchronously with the hopper 11. Based on the interceptor plate, flow control is formed, and during the vibrating process, the interceptor plate can remain stationary or maintain interception and follow-up, thereby improving the control of the feeding amount and reducing the overlap rate of the box lids.

[0028] The vibrating hopper 2 includes a receiving box 20 located below the discharge end of the hopper 11, and a second vibrator 21 that drives the receiving box 20 to move at multiple angles in the vertical direction to overturn and spread the box lid outwards. The receiving box 20 includes a box frame 200 and a flexible box bottom layer 201 formed at the bottom of the box frame 200, wherein the flexible box bottom layer 201 can throw the box lid upwards based on vibration and elasticity. The flexibility increases the probability of the box lid flipping, thereby increasing the accuracy of box lid picking. The second vibrator 21 includes multiple vibrating rods 210 located around the receiving box 20, wherein one or more of the multiple vibrating rods 210 move synchronously to generate vibration. The appropriate vibration is selected according to the actual working conditions to improve the material picking requirements.

[0029] The feeding robot 3 includes a vision unit, a picking seat 31, a transfer unit 32 that drives the picking seat 31 to form linear motion in the X and Y axis directions based on the instructions of the vision unit, and picking claws 33 arranged side by side on the picking seat 31 and all capable of moving along the Z axis direction.

[0030] The transfer unit 32 includes an X-axis moving assembly 320 and a Y-axis moving assembly 321. The X-axis moving assembly 320 includes a first bearing a1 having a track I extending along the X-axis direction, and a first power member a2 mounted within the first bearing a1 to form a linear motion. The material handling seat 31 is matched and connected to track I. The Y-axis moving assembly 321 includes a second bearing b1 having a track II extending along the Y-axis direction, and a second power member b2 mounted on the second bearing b1 to form a linear motion. The first bearing a1 is matched and connected to track II. Movement along the X and Y axes is achieved based on the motion guidance formed by track I and track II. The first power member a2 is a transmission screw extending along the X-axis; the second power member b2 includes a transmission rack b20 fixed on the second bearing b1, a traveling gear b21 mounted on the first bearing a1, and a power motor b22.

[0031] The rotation conditions of the claw head of each picking claw 33 around the Z-axis are set. The center distance between each two adjacent claw heads is equal and is D. The length of each box cover is L, L≤D≤1.8L. The first degree of freedom is formed by the rotation of the picking claw, and the second degree of freedom is formed by the linear motion of the up and down misalignment of the picking claw. The verification basis is whether the box cover on each two adjacent picking claws moves and collides, and whether the picking claw moves and shakes off excess or interlayer box covers. The multiple picking claws that pass the verification are rotated to a parallel angle, and the box covers are fed to the transfer platform based on the X, Y and Z axis movements. In some specific embodiments, the picking claw 33 includes a fixed base 330 fixedly connected to the picking seat 31, a movable base 331 mounted on the fixed base 330 and capable of moving up and down along the Z-axis, a negative pressure adsorption head 332 mounted on the movable base 331, and a power unit 333 driving the negative pressure adsorption head 332 to rotate, wherein the adsorption and rotation of the negative pressure adsorption head 332 can be synchronized. Under the premise of satisfying Z-axis movement, the synchronization of adsorption and rotation not only facilitates material picking but also provides a basis for verification. A guide rail g extending along the Z-axis is provided on the fixed base 330, and the movable base 331 slides on the guide rail g and moves up and down along the Z-axis during vertical traction. Generally, a pulley m or a roller is used for traction. Simultaneously, a hollow stepper motor is used for rotation and negative pressure adsorption.

[0032] Furthermore, the transfer platform 4 includes a fixed base plate 40, a long-side guide rail 41 and a short-side guide rail 42 formed on the fixed base plate 40, a short-side alignment module 43 that moves along the long-side guide rail 41, and a long-side alignment module 44 that moves along the short-side guide rail 41. The short-side alignment module 43 and the long-side alignment module 44 are staggered and, based on the long-side guide rail 41 and the short-side guide rail 42, align and straighten the lids transferred to the transfer platform 4 during their respective movements. Accurate positioning alignment is required before assembly.

[0033] The short side rails consist of 42 single rails located on one side of the fixed base plate 40; the long side rails consist of multiple rails 41, each of which is fixed to the fixed base plate 40 by perpendicularly abutting against the short side rails 42 from its end, and the multiple long side rails 41 are spaced apart along the length of the short side rails 42; the short side straightening module 43 includes a comb plate 430 and a comb power unit 431 that abut against each of the long side rails 41 and move synchronously along the long side rails 41 and are installed on the fixed base plate 40, with each comb groove arranged in a specific pattern. A long-side guide bar 41; the long-side straightening module 44 includes straightening bars 440 that correspond one-to-one with and are arranged parallel to the long-side guide bars 41, a synchronizing link 441 for synchronously connecting multiple straightening bars 440 and slidably mounted on a fixed base plate 40, and a link power unit 442 that pushes the synchronizing link 441 to move the straightening bars 440 along the fixed base plate 40 toward the long-side guide bars to form straightening, wherein the straightening bars 440 move between each comb tooth and the spaced long-side guide bars 41. By fixing the long-side guide bars 41 and the short-side guide bars 40, and forming staggered straightening by the relative movement of the long-side straightening module 44 and the short-side straightening module 43, this method not only provides sufficient storage space, but also allows for further adjustment of the final feeding position even if there is a slight deviation in material picking, through straightening.

[0034] The component feeding unit B includes a conveyor belt B1 forming a transmission channel and a correction component B2 arranged on both sides of the conveyor belt B1. The conveyor belt B1 and the correction component B2 are conventional structures and will not be described in detail here.

[0035] The curing degree detection unit C of the sealant layer on the surface of the box includes a detection probe C1 corresponding to the box and a curing power unit C2 that drives the detection probe C1 to rise and fall synchronously.

[0036] The assembly robot D is a commercially available product, which includes a material handling head D1 with an adsorption box cover and an arm D2 with multiple degrees of freedom for rotation and displacement.

[0037] The assembly auxiliary unit E includes a curing light source E1 located at the top and corresponding to the box body, and a vision inspection component E2 located on the side and corresponding to the box body. Each vision inspection component E2 includes a vision camera e20 and a supplementary light e21.

[0038] In summary, the assembly process of the junction box cover in this embodiment includes the following steps: S1, Loading the box lid First, the lids are dispersed and spread in the receiving box using a vibration-shaking method. Second, based on vision, negative pressure is used to pick up lids with similar orientations and identical front faces one by one, and the position of the lids is checked and the negative pressure is adjusted for multiple lids with the same orientation. Finally, the picked-up lids are transferred to the transfer platform for alignment and straightening. S2, Component loading The component with the housing is moved into the assembly center with the housing surface facing upward and coated with a sealant layer. At the same time, a sealant detection probe is inserted into the depth of the sealant layer to obtain the degree of curing of the sealant layer. When the set degree of curing is reached, the sealant detection probe is reset. S3, Cover Assembly A robotic arm is used to pick up multiple box covers on the transfer platform and insert them one by one into the box body from one end or one side. Then, the other end or the other side is fastened to the surface of the box body. At the same time, with the assistance of a curing light source, the box cover is pressed flat and glued to the sealant layer. S4. Installation Inspection The installation is inspected to ensure it is up to standard by using visual cameras and lighting compensation that correspond to each junction box.

[0039] Specifically, in step S1, the box covers scattered in the receiving box are shaken and flipped based on vibration to reverse their front and back sides and orientation. This flipping increases the accuracy of the negative pressure robotic arm in selecting the box covers, improving feeding efficiency. The resulting vibration is a multi-angle overturning motion in the vertical direction; this overturning is more conducive to the rolling of the box covers. In step S1, the verification method used is based on the rotation of the adsorption position and the synchronous vertical movement of the adsorption position to shake off stacked box covers or to remove incorrectly positioned box covers by the rotational collision of the adsorbed box covers, and then re-adsorb to form multiple box covers with similar adsorption positions, consistent orientation, and identical front and back sides, which are then sent to the transfer platform. Verification based on multi-free motion improves the success rate of feeding and reduces the interruption rate. During the verification process, every two adjacent adsorption positions rotate while moving vertically towards each other. This results in a fast and relatively accurate verification speed. The transfer platform in step S1 has mounting stations corresponding one-to-one with the box bodies on the assembly. The verified box covers are placed in their respective mounting stations, and then the length and width directions of the box covers are corrected and aligned. The alignment and positioning are based on the requirement of precise assembly. The alignment and positioning method uses the length and width directions of a lid as a reference, and simultaneously pushes multiple lids along their length and width directions to align them with the reference. Based on the bidirectional reference, a synchronous pushing method can simultaneously align and position multiple lids. In step S2, the adhesive detection probes correspond one-to-one with the box positions, and the resistance encountered during insertion during vertical movement is used to obtain curing information. The specific resistance can be set according to actual needs. A curing light source is located directly above each box, allowing for rapid curing during bonding and improving the quality of lid assembly. Example 2

[0040] The junction box cover assembly equipment in this embodiment is basically the same as that in Embodiment 1, except for the structure of the vibrating material box.

[0041] Combination Figure 10As shown, in this example, an upward-extending brush 202 is provided at the top of the box frame 200. The brush 202 removes excess or overlapping box covers; this brushing method further reduces the probability of incorrect material handling. Furthermore, a waste cover collection box 22 is provided on one side of the receiving box 20. When damaged or defective products are found, they can be adsorbed and sent to the waste cover collection box 22. That is, the brush at the top of the receiving box brushes the stacked or excess box covers on the negative pressure adsorption head into the receiving box, reducing the error rate of box cover feeding. Simultaneously, the negative pressure adsorption head visually sends NG box covers to the waste collection box.

[0042] In summary, after adopting the junction box cover assembly process, firstly, the cover is dispersed and spread on the receiving box using a vibration-shaking method. Based on vision, negative pressure is used to adsorb cover with similar orientation and the same front face one by one, and the adsorption position of the cover is checked and multiple covers with the same orientation are adjusted for negative pressure adsorption. Then, the adsorbed cover is transferred to the transfer platform for alignment. Next, the component with the box body is moved horizontally into the assembly center, with the surface of the box body facing upward and coated with a sealant layer. At the same time, a sealant detection probe is inserted into the depth of the sealant layer to obtain the curing degree of the sealant layer, and the detection probe is reset at the set curing degree. Finally, a robotic arm is used to adsorb multiple cover on the transfer platform, and each cover is inserted into the box body from one end or side, and then the other end or side is fastened to the surface of the box body. At the same time, with the assistance of a curing light source, the cover is pressed flat and glued to the sealant layer.Therefore, this invention addresses several key aspects. First, in the lid feeding process, the shaking and tumbling of the lids increases the selection rate, thereby reducing the error rate and improving feeding efficiency. Simultaneously, during verification and alignment, the lids are positioned aligned and consistent on the transfer platform, reducing feeding interruptions. Second, based on the curing degree detection of the sealant layer, bonding and fastening are performed within a set curing level, aided by a light source, improving lid assembly quality and reducing adhesive overflow. Third, the tumbling mechanism increases the accuracy of the negative pressure robotic arm in selecting lids, improving feeding efficiency. The resulting vibration is a multi-angle overturning motion in the vertical direction, which is more conducive to lid tumbling; in other words, the shaking method is more beneficial for lid tumbling. The process involves the scattering and shaking of the lids, along with flow control based on the interceptor plate. During the shaking process, the interceptor plate can remain stationary or maintain its interception function, improving the control of the feeding amount and reducing lid overlap. The fourth aspect involves verification based on the rotation of the adsorption position and its synchronous vertical movement. This shakes off stacked lids or removes improperly positioned lids by causing them to rotate and collide with the adsorbed lids. Multiple lids with similar adsorption positions, consistent orientation, and aligned front and back are then sent to the transfer platform. Verification is achieved through multi-free movement, improving the success rate of feeding and reducing interruption rates. During verification, every two adjacent adsorption positions rotate while moving vertically towards each other, thus forming... The verification speed is fast and relatively accurate; fifthly, based on the alignment and positioning to meet the needs of precise assembly, the alignment and positioning method uses the length and width of a lid as the grid reference. Multiple lids are simultaneously pushed horizontally along their length and width to align them with the grid reference. Based on the bidirectional grid movement reference, a synchronous pushing method can simultaneously align and position multiple lids. This method not only provides sufficient storage space, but also allows for further adjustment of the final feeding position even if there are minor deviations in material handling; sixthly, the adhesive detection probes used correspond one-to-one with the box positions, and obtain curing information based on the resistance encountered during vertical insertion. The specific resistance... The settings can be customized according to actual needs. In addition, each box is equipped with a curing light source on its top, which can quickly cure the adhesive while the box is being glued, improving the quality of the box lid assembly. The seventh aspect is that the XY axis movement is achieved based on the motion guide formed by track I and track II. At the same time, under the premise of satisfying the Z axis movement, the synchronous adsorption and rotation not only facilitates material picking, but also provides a basis for verification. In addition, pulleys or rollers are used for traction, and hollow stepper motors are used for rotation and negative pressure adsorption. The eighth aspect is that the brush on the top of the receiving box sweeps the stacked or excess box lids on the negative pressure adsorption head into the receiving box, reducing the error rate of box lid feeding. At the same time, the negative pressure adsorption head sends the NG box lids to the waste collection box based on vision.

[0043] The present invention has been described in detail above, with the aim of enabling those skilled in the art to understand and implement the invention. However, this description should not be construed as limiting the scope of protection of the invention. All equivalent changes or modifications made in accordance with the spirit and essence of the invention should be included within the scope of protection of the invention.

Claims

1. A junction box cover assembly process, characterized in that, It includes the following steps: S1, Loading the box lid The box lid feeding unit includes a vibrating hopper, a vibrating box, a feeding robot, and a transfer platform. The feeding robot includes a vision unit, a picking seat, a transfer unit that drives the picking seat to move linearly in the X and Y axes based on commands from the vision unit, and picking claws arranged side by side on the picking seat, each capable of moving along the Z axis. The claw heads of each picking claw are set to rotate around the Z axis, with the center distance between any two adjacent claw heads being equal and D. The length of each box lid is L, where L≤D≤1.8L. The rotation of the picking claws forms the first degree of freedom, and the vertical misalignment of the picking claws constitutes the second degree of freedom. The first and second degrees of freedom are synchronized, with each adjacent picking claw head moving in a linear fashion. The verification is based on whether the lid on the claw moves and collides, and whether the excess or interlayer lid is shaken off based on the movement of the picking claw. Multiple picking claws that pass the verification are rotated to a parallel angle, and the lids are fed to the transfer platform based on the movement of the X, Y and Z axes. The picking claw includes a fixed base fixedly connected to the picking seat, a movable base installed on the fixed base and capable of moving up and down along the Z axis, a negative pressure adsorption head installed on the movable base, and a power unit that drives the negative pressure adsorption head to rotate. The adsorption and rotation of the negative pressure adsorption head can be synchronized. First, the lids are dispersed and spread in the receiving box based on the vibration shaking method. The lids scattered in the receiving box are thrown over by vibration to flip the front and back of the lids and their orientation. Secondly, based on vision, a negative pressure adsorption head is used to adsorb lids with similar orientations and identical front sides one by one. The adsorption position of the lids is verified, and multiple lids with the same orientation are adjusted for negative pressure adsorption. The verification method is based on the rotation of the adsorption position and the synchronous vertical movement of the adsorption position to shake off the stacked lids or to remove lids with incorrect adsorption positions by the rotation and collision of the adsorbed lids. The lids are then re-adsorbed to form multiple lids with similar adsorption positions, consistent orientation, and identical front and back sides, which are then sent to the transfer platform. During the verification process, every two adjacent adsorption positions rotate and move vertically towards each other. Finally, the retrieved lids are transferred to the transfer platform for alignment and straightening of multiple lids. S2, Component loading The component with the housing is moved into the assembly center with the housing surface facing upward and coated with a sealant layer. At the same time, a sealant detection probe is inserted into the depth of the sealant layer to obtain the degree of curing of the sealant layer. When the set degree of curing is reached, the sealant detection probe is reset. S3, Cover Assembly A robotic arm is used to pick up multiple box covers from the transfer platform and insert them one by one into the box body from one end or side. Then, the other end or side is fastened onto the surface of the box body. At the same time, with the assistance of a curing light source, the box cover is pressed flat and glued to the sealant layer.

2. The junction box cover assembly process according to claim 1, characterized in that, In step S1, the resulting vibration is a multi-angle overturning motion in the vertical direction.

3. The junction box cover assembly process according to claim 1, characterized in that, In step S1, the stacked or excess lids on the negative pressure adsorption head are brushed into the receiving box using the brush on the top of the receiving box.

4. The junction box cover assembly process according to claim 1, characterized in that, In step S1, the NG box cover is delivered to the waste collection box by the negative pressure adsorption head based on vision.

5. The junction box cover assembly process according to claim 1, characterized in that, In step S1, the transfer platform is equipped with a mounting station that corresponds one-to-one with the box on the component. The verified box cover is placed in each mounting station, and then the box cover is corrected and aligned in the length and width directions.

6. The junction box cover assembly process according to claim 5, characterized in that, The alignment method used takes the length and width of a box lid as the reference for alignment, and then pushes multiple box lids horizontally along the length and width of the box lid simultaneously to align the box lids with the reference for alignment.

7. The junction box cover assembly process according to claim 1, characterized in that, In step S2, the adhesive detection probes used correspond one-to-one with the positions of the box body, and the curing degree information is obtained based on the resistance encountered during the up-and-down movement of the probes.

8. The junction box cover assembly process according to claim 1, characterized in that, Each box has a curing light source located directly above it.

9. The junction box cover assembly process according to claim 1, characterized in that, The box assembly process also includes step S4, in which the installation is checked for compliance using a vision camera and lighting compensation that correspond one-to-one with the junction box.

10. An assembly device used in the assembly process of the junction box cover as described in any one of claims 1 to 9, characterized in that, The assembly equipment includes a lid feeding unit, a component feeding unit, a curing degree detection unit for the sealant layer on the box surface, an assembly robot, and an assembly auxiliary unit. The lid feeding unit includes a vibrating hopper, a vibrating material box, a feeding robot, and a transfer platform. The vibrating hopper can spread the lids relatively open and vibrate them towards the outlet. The vibrating material box performs multi-angle movements to toss and spread the lids in all directions. The feeding robot, based on XYZ axial movement, delivers the calibrated lids to the transfer platform for alignment. The calibration is based on the rotation of the picking claw to achieve the first free movement. The first degree of freedom is defined by the linear motion of the vertically misaligned picking claws, and the calibration is based on whether the lids on each pair of adjacent picking claws collide and whether the picking claws shake off excess or interlayer lids. The curing degree detection unit includes a glue detection probe corresponding to each box body and a curing power unit that drives the glue detection probes to move up and down synchronously. The assembly auxiliary unit includes a curing light source located at the top and corresponding to each box body, and a vision inspection component located on the side and corresponding to each box body.

11. The assembly equipment according to claim 10, characterized in that, The component feeding unit includes a conveyor belt forming a transmission channel and correction components arranged on both sides of the conveyor belt.

12. The assembly equipment according to claim 10, characterized in that, The assembly robot includes a picking head with an adsorption box cover and an arm with multiple degrees of freedom for rotation and displacement.

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