A size detection pairing device and a pairing method

Abstract

The application relates to the technical field of automatic assembly of electronic products, and discloses a size detection and pairing device and method, which comprises a machine table, a main body detection guide rail, a buffer translation guide rail, a spare part detection guide rail, a visual detection module extending in a second direction and a transfer mechanical hand. A main body visual camera and a spare part visual camera respectively perform non-contact size detection on the main body and the spare part; the spare part is buffered to a plurality of buffer positions of a buffer tray through the transfer mechanical hand; a main board is controlled to control the transfer mechanical hand to reversely select the spare part most matched with each main body in size in the buffer tray according to a size matching result, and the spare part is carried to a spare part high-precision detection platform II, so that the optimal pairing of the main body and the spare part is realized. The application can eliminate uneven assembly gaps, improve the appearance yield, realize online automatic detection and pairing of a production line, save manpower and space, and meet high-precision assembly requirements.

Description

Technical Field

[0001] This invention relates to the field of automated assembly technology for electronic products, and specifically to a size detection and pairing device and a pairing method. Background Technology

[0002] In the production and assembly of electronic products such as mobile phones, tablets, and smartwatches / bands, there are certain dimensional deviations in the incoming dimensions of various components. Due to the unavoidable influence of factors such as mold wear, injection molding processes, material shrinkage, and temperature and humidity changes during processing, the dimensions of the main body and exterior accessories are not entirely consistent. Random pairing and assembly can lead to inconsistent gaps at different locations on the same product. Excessive gaps can create a noticeable "step-like" appearance and light leakage, while insufficient gaps can cause squeezing, whitening, and in severe cases, even prevent assembly, directly reducing the yield rate. A known practice is to measure the dimensions of the two components A and B to be assembled in advance and store them in corresponding packaging trays according to their size gradient. For example, component A is divided into large, medium, and small compartments, and component B is also divided into large, medium, and small compartments. Large A is paired with large B, medium A with medium B, and small A with small B, thus achieving matching between A and B of different sizes. However, the above method still has the following drawbacks: After component A and component B are segmented by size, there are still slight dimensional differences within each segment. During the final assembly, only random assembly within each segment is performed, which cannot achieve optimal matching; the size inspection equipment cannot be directly connected to the assembly line, which occupies a relatively large workshop area and requires personnel to handle the segmented components, resulting in unnecessary labor costs; random pairing leads to uneven assembly gaps, which cannot meet the assembly precision requirements of high-end products. Mid-to-high-end mobile phones typically require assembly gaps of ≤0.1mm, which traditional random pairing can no longer meet the requirements; once mismatched main body and accessories are assembled, they are almost impossible to rework and can only be scrapped, resulting in material waste. Summary of the Invention

[0003] The purpose of this invention is to provide a size detection and pairing device and a pairing method to solve the problem of uneven assembly gaps caused by random pairing of main body and accessories, and the lack of smooth detection and assembly processes.

[0004] To achieve the above objectives, the present invention provides a size detection and pairing device using the following technical solution:

[0005] A size detection and pairing device includes a machine base, on which a control motherboard is fixedly connected. A main body detection guide rail, a buffer translation guide rail, and an accessory detection guide rail extend along a first direction on the machine base. The main body detection guide rail, the buffer translation guide rail, and the accessory detection guide rail are parallel to each other along a second direction, which is perpendicular to the first direction. A high-precision detection platform is slidably connected to the main body detection guide rail. Multiple main body positioning fixtures are provided on the high-precision detection platform for placing the product body. A buffer tray is slidably connected to the buffer translation guide rail, and the buffer tray is provided with multiple buffer slots for temporarily storing accessories; The accessory inspection guide rail is equipped with a high-precision accessory inspection platform one and a high-precision accessory inspection platform two. Both the high-precision accessory inspection platform one and the high-precision accessory inspection platform two are equipped with multiple accessory positioning fixtures for positioning accessories. The machine platform extends along the second direction, comprising a vision inspection module and a transfer robot. The visual inspection module includes a frame, a crossbeam, a main visual camera, and an accessory visual camera. The frame is fixedly connected to the machine base, and the crossbeam is fixed to the frame and extends along the second direction. The main visual camera and the accessory visual camera are respectively fixedly connected to both sides of the crossbeam. The main visual camera faces the main inspection guide rail and is used to perform non-contact dimensional inspection of the main body to obtain the main body's dimensional data. The accessory visual camera faces the accessory inspection guide rail and is used to perform non-contact dimensional inspection of accessories to obtain accessory dimensional data. The control motherboard is configured to: control the buffer tray to move along the first direction, control the transfer robot to move along the second direction and perform vertical lifting and lowering movements; control the transfer robot to transport the parts on the high-precision inspection platform one to the buffer tray; and, based on the matching results of the main body size data and the part size data, control the transfer robot to reverse-select the parts that match each main body size from multiple buffer positions on the buffer tray and transport them to the high-precision inspection platform two.

[0006] As an optimization of a size detection and pairing device, the transfer robot includes a base, a cable chain, a linear guide rail, and a clamping assembly. The base is fixedly connected to the machine tool, the cable chain is slidably connected to the base and slides along a second direction, the linear guide rail is vertically fixed to the cable chain, and the clamping assembly is fixedly connected to the telescopic end of the linear guide rail. The clamping assembly includes multiple independently arranged grippers, each gripper having an independent drive cylinder for controlling the independent lifting and lowering of the corresponding gripper.

[0007] As an optimization of the size detection and pairing device, the vision inspection module also includes a position calibration camera; the position calibration camera is fixedly connected to the center of the crossbeam and faces the buffer tray.

[0008] As an optimization of the size detection and pairing device, the main body high-precision detection platform is provided with at least two, and each of the main body high-precision detection platforms is arranged in a staggered manner.

[0009] As an optimization of the size detection and pairing device, the high-precision detection platform one and the high-precision detection platform two of the accessories are arranged in a staggered manner along the vertical direction.

[0010] Secondly, a size detection pairing method is provided, applied to the aforementioned size detection pairing equipment, wherein the starting position of the machine tool along the first direction is the loading position, and the ending position of the machine tool along the first direction is the unloading position; the intermediate robot arm is the intermediate position, and the pairing method includes the following steps: S1. Place the main body of the product on the main body high-precision inspection platform, and the main body high-precision inspection platform transports the main body of the product along the main body inspection guide rail to the bottom of the vision inspection module; place the appearance accessories on the accessory high-precision inspection platform one, and the accessory high-precision inspection platform one transports the appearance accessories along the accessory inspection guide rail to the bottom of the vision inspection module; S2. The main body vision camera performs non-contact size detection on each main body on the main body positioning fixture to obtain main body size data; the accessory vision camera performs non-contact size detection on each accessory on the accessory positioning fixture to obtain accessory size data. S3. The high-precision inspection platform for accessories will transport the inspected accessories to the transfer station, and the transfer robot will transport the accessories from the transfer station to multiple buffer positions on the buffer tray for temporary storage. S4. The control motherboard controls the buffer tray and the transfer robot to move in coordination according to the matching result of the main body size data and the accessory size data, and drives the transfer robot to reverse select the accessories that match the main body size from multiple buffer positions; S5. The transfer robot arm drives each of the grippers to pick up the selected parts one by one from the buffer tray and simultaneously transport them to the part positioning fixture of the high-precision part detection platform two. S6. The high-precision inspection platform for accessories continues to transport the paired accessories to the unloading position, and the high-precision inspection platform for the main body simultaneously continues to transport the main body to the unloading position.

[0011] As an optimization of the size detection and pairing method, in step S4, the control motherboard sorts the main body size data and accessory size data by absolute value or weighted value from smallest to largest, and selects the N accessories with the smallest difference from multiple buffer positions of the buffer tray for pairing. The N is a positive integer and is consistent with the number of main bodies placed on the main body high-precision detection platform.

[0012] As an optimization of the size detection and pairing method, after step S3 is completed, the high-precision detection platform for the accessories is reset to the loading position.

[0013] As an optimization of the size detection and pairing method, after step S6 is completed, the high-precision detection platform two for accessories is reset to the intermediate position.

[0014] As an optimization of the size detection pairing method, after step S6 is completed, the main body high-precision detection platform is reset to the loading position.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: (1) The main body vision camera and the accessory vision camera perform non-contact size detection on each main body and accessory to obtain accurate size data; the control motherboard sorts the components from smallest to largest according to the absolute value or weighted value of the difference, and selects the N accessories with the smallest difference from multiple buffer positions in the buffer tray to achieve optimal matching of the main body and accessories, ensuring uniform gap of the assembly surface from the source, meeting the appearance standard of high-end consumer electronics products with assembly gap ≤0.05mm, avoiding appearance defects such as "step feeling" and light leakage due to excessive gap, and squeezing white due to excessive gap.

[0016] (2) The equipment can be directly connected to the feeding machine and sorting machine. The detection, pairing and assembly processes are connected in series on the online production line. The main high-precision detection platform is set up with at least two and arranged vertically. The high-precision detection platform one and the high-precision detection platform two of the accessories are arranged vertically to achieve the dual-station staggered operation. The detection and pairing actions do not occupy the production line cycle time. There is no need for manual turnover of materials, saving labor costs and workshop equipment area.

[0017] (3) The position calibration camera verifies the position of the accessories on the buffer tray at the moment of power-on, confirms that the position code is consistent with the physical position, prevents the accessories from being misplaced due to the last shutdown or accidental vibration, and ensures the accuracy of the reverse selection action; all main body size data, accessory size data and pairing records are digitally stored, which facilitates quality traceability and process optimization. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the overall structure of a size detection and pairing device according to an embodiment of this application; Figure 2 This is a schematic diagram of the overall structure of the main detection guide rail in an embodiment of this application; Figure 3 This is a schematic diagram of the overall structure of the cache translation guide rail according to an embodiment of this application; Figure 4 This is a schematic diagram of the overall structure of the accessory inspection guide rail in an embodiment of this application; Figure 5 This is a schematic diagram of the overall structure of the visual inspection module in an embodiment of this application; Figure 6 This is a schematic diagram of the overall structure of the transfer robot in the embodiments of this application; Figure 7 This is a flowchart of a size detection and pairing method according to an embodiment of this application.

[0020] In the diagram: 1. Machine base; 11. Loading position; 12. Unloading position; 13. Transfer position; 2. Main body inspection guide rail; 21. Main body high-precision inspection platform; 22. Main body positioning fixture; 3. Buffer translation guide rail; 31. Buffer tray; 32. Buffer position; 4. Parts inspection guide rail; 41. High-precision inspection platform one; 42. High-precision inspection platform two; 43. Parts positioning fixture; 5. Vision inspection module; 51. Frame; 52. Crossbeam; 53. Main body vision camera; 54. Parts vision camera; 55. Position calibration camera; 6. Transfer robot; 61. Base; 62. Cable chain; 63. Linear guide rail; 64. Clamping assembly; 65. Gripper; 66. Independent drive cylinder. Detailed Implementation

[0021] To make the technical solution and advantages of the present invention clearer, the present invention and its beneficial effects will be described in further detail below with reference to specific embodiments and accompanying drawings, but the embodiments of the present invention are not limited thereto.

[0022] In the description of this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing" 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 mechanical connection or an electrical connection; 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. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0023] All standard parts used in this invention can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art, and the circuit connection adopts conventional connection methods in the prior art, which will not be described in detail here.

[0024] The following is in conjunction with the appendix Figures 1-7 This application will be described in further detail below.

[0025] Firstly, referring to Figure 1 This embodiment provides a size detection and matching device, including a machine base 1. The machine base 1 has a cuboid structure, with its top surface serving as a worktable. Various components of the device are installed on the worktable. The starting position of the machine base 1 along a first direction is the loading position 11, typically where a loading machine is placed. The ending position of the machine base 1 along the first direction is the unloading position 12, typically where a sorting machine is placed. Both the loading machine and the unloading machine are conventional equipment on assembly production lines. A control motherboard is fixedly connected inside the machine base 1. The control motherboard is electrically connected to other components on the machine base 1 via wires. In this embodiment, the control motherboard is an industrial computer installed inside the machine base 1.

[0026] Reference Figure 1 The machine base 1 is equipped with a main detection guide rail 2, a buffer translation guide rail 3, and a parts detection guide rail 4 extending along the first direction (i.e., the X-direction, the material loading and unloading conveying direction). The main detection guide rail 2, buffer translation guide rail 3, and parts detection guide rail 4 are parallel to each other along the second direction (i.e., the Y-direction, perpendicular to the X-direction). The main detection guide rail 2 and parts detection guide rail 4 are located on opposite sides of the machine base 1, with the buffer translation guide rail 3 positioned in the middle between the main detection guide rail 2 and parts detection guide rail 4, forming a three-rail parallel arrangement. Each rail is electrically connected to the control main board via wires. All three guide rails use high-precision linear modules, such as the Toyo GTH series, to meet the requirements of high-precision linear drive positioning.

[0027] Reference Figure 1 and Figure 2A high-precision inspection platform 21 is slidably mounted on the main inspection guide rail 2. Multiple main inspection positioning fixtures 22 are provided on the main inspection platform 21 for placing the product main body. In this embodiment, one high-precision inspection platform 21 is configured with four main inspection positioning fixtures 22. Each main inspection positioning fixture 22 is a contour positioning punch that matches the shape of the product main body, and one product main body is placed on each fixture 22. At least two high-precision inspection platforms 21 are provided, arranged in a staggered vertical position to prevent mechanical interference during movement. In this embodiment, two high-precision inspection platforms 21 are configured, staggered in height. By adopting a staggered operation mode—that is, while one high-precision inspection platform 21 is unloading at the unloading position 12, the other high-precision inspection platform 21 is receiving a new batch of main bodies at the loading position 11—the inspection cycle on one side of the main body is uninterrupted, improving the production line cycle utilization rate of the equipment.

[0028] Reference Figure 1 and Figure 3 A buffer tray 31 is slidably mounted on the buffer translation guide rail 3. The buffer tray 31 has multiple buffer positions 32 for temporarily storing parts, arranged in an array. In this embodiment, the buffer tray 31 has 104 buffer positions 32, capable of buffering 104 tested parts. These 104 buffer positions 32 provide sufficient data samples to match the optimal solution from multiple rows and columns of parts, adapting to the matching needs of different sized bodies. It is understood that the number of buffer positions 32 is not limited to 104; other numbers are also possible, as long as sufficient buffer data samples are provided. This embodiment is merely a preferred implementation of the present invention.

[0029] The buffer translation guide 3 uses a high-precision linear module, such as the Toyo GTH series, to drive the buffer tray 31 to move along the first direction, thereby achieving precise positioning of the buffer tray 31 in the X direction. During the buffering process, the transfer robot releases the inspected parts one by one into the empty positions on the buffer tray 31. The control motherboard records the buffer position 32 of each part and its corresponding part size data, forming a mapping relationship between part position and size data, providing a data basis for subsequent reverse selection.

[0030] Reference Figure 1 and Figure 4A high-precision component inspection platform 41 and a high-precision component inspection platform 42 are slidably mounted on the component inspection guide rail 4. The high-precision component inspection platform 41 and the high-precision component inspection platform 42 perform different functions. Both the high-precision component inspection platform 41 and the high-precision component inspection platform 42 are equipped with multiple component positioning fixtures 43 for positioning components. In this embodiment, the component positioning fixture 43 is a contour positioning punch that matches the shape of the component, and one component is placed on each component positioning fixture 43. The high-precision component inspection platform 41 and the high-precision component inspection platform 42 are staggered vertically, that is, they are offset by a certain distance in the height direction to prevent mechanical interference during movement. The travel range of the high-precision component inspection platform 1 (41) covers the loading position 11 and the transfer position 13, used to transport components from the loading position 11 to the transfer position 13. The loading position 11 is specifically located at the end of the component inspection guide rail 4 near the loading machine. The travel range of the high-precision component inspection platform 2 (42) covers the transfer position 13 and the unloading position 12, used to transport components selected from the buffer tray 31 by the transfer robot from the transfer position 13 to the unloading position 12. The unloading position 12 is specifically located at the end of the component inspection guide rail 4 near the sorting machine. The transfer position 13 is formed at the junction of the high-precision component inspection platform 1 (41) and the high-precision component inspection platform 2 (42). After the high-precision component inspection platform 1 (41) completes the component transport, it resets to the loading position 11 to wait for the next batch of components; after the high-precision component inspection platform 2 (42) completes the component transport, it resets to the transfer position 13 to wait for the next batch of paired components.

[0031] Reference Figure 1 and Figure 5 A vision inspection module 5 is installed on the machine base 1, extending along the second direction. The vision inspection module 5 is electrically connected to the control motherboard via wires. The vision inspection module 5 is fixed and spans three guide rails: the main body inspection guide rail 2, the buffer translation guide rail 3, and the accessory inspection guide rail 4. It is responsible for non-contact dimensional inspection of the main body and accessories. The vision inspection module 5 includes a frame 51, a crossbeam 52, a main body vision camera 53, and an accessory vision camera 54. The frame 51 is fixedly connected to the machine base 1, and the crossbeam 52 is fixed to the frame 51 and extends along the second direction. The frame 51 and the crossbeam 52 form a gantry structure. The main body vision camera 53 and the accessory vision camera 54 are fixedly connected to both sides of the crossbeam 52. The main body vision camera 53 faces the main body inspection guide rail 2 and is used to perform non-contact dimensional inspection of each main body on the main body positioning fixture 22 to obtain the main body dimensional data. The accessory vision camera 54 faces the accessory inspection guide rail 4 and is used to perform non-contact dimensional inspection of each accessory on the accessory positioning fixture 43 to obtain the accessory dimensional data.

[0032] Furthermore, the vision inspection module 5 also includes a position calibration camera, which is fixedly connected to the center of the crossbeam 52 and faces the buffer tray 31. It is used to verify the position of the parts on the buffer tray 31 at the time of power-on, to confirm whether the position code of the parts is consistent with the physical position, to prevent the parts from being misaligned due to the last power-off or accidental vibration, and to ensure the accuracy of the pairing results.

[0033] Reference Figure 1 and Figure 6 A transfer robot is installed on the machine base 1, extending along the second direction. The transfer robot is electrically connected to the control mainboard via wires. The transfer robot includes a base, a cable carrier, a vertical guide rail, and a gripper assembly. The base is fixedly installed on the top surface of the machine base 1 and is a gantry structure, extending along the second direction. The cable carrier is slidably connected to the base and can slide along the second direction. The cable carrier is used to carry cables and ensure that the cables are not pulled during movement. The vertical guide rail is vertically fixed to the cable carrier, and the gripper assembly is fixedly connected to the telescopic end of the vertical guide rail. The vertical guide rail drives the gripper assembly to perform large displacement lifting and lowering. The gripper assembly includes multiple independently set grippers, each gripper having an independent drive cylinder. The independent drive cylinder is used to control the corresponding gripper to perform small displacement lifting and lowering independently. In this embodiment, the number of grippers is the same as the number of accessory positioning fixtures 43, with each gripper corresponding to one accessory positioning fixture 43. By combining the large displacement lifting of the vertical guide rail with the small displacement lifting of the independently driven cylinder, the gripper assembly can pick up the accessories in different buffer material positions 32 one by one or simultaneously, so as to achieve accurate picking of accessories at any position on the buffer material tray 31.

[0034] The control motherboard is connected to the main body high-precision inspection platform 21, the accessory high-precision inspection platform one 41, the accessory high-precision inspection platform two 42, the buffer tray 31, the vision inspection module 5, and the transfer robot, respectively, to control the coordinated movement of the above-mentioned moving parts. The control motherboard is configured to: control the buffer tray 31 to move along a first direction; control the transfer robot to move along a second direction and to perform vertical lifting and lowering movements; control the transfer robot to transport accessories from the accessory high-precision inspection platform one 41 to the buffer tray 31; and, based on the matching results of the main body size data and the accessory size data, control the transfer robot to reverse-select accessories that match the size of each main body from multiple buffer positions 32 in the buffer tray 31 and transport them to the accessory high-precision inspection platform two 42. Through the above control logic, the coordinated movement of the buffer tray 31 in the X direction and the movement and lifting and lowering of the transfer robot in the Y direction are realized, thereby achieving precise arrival at any buffer position 32 on the buffer tray 31 and accurate picking of accessories.

[0035] The application process and working principle of this application embodiment are as follows: The feeding machine transports the main body and appearance accessories to the main body high-precision inspection platform 21 and the accessory high-precision inspection platform 41, respectively; the main body high-precision inspection platform 21 transports the main body along the main body inspection guide rail 2 to the area below the vision inspection module 5, and the accessory high-precision inspection platform 41 transports the accessories along the accessory inspection guide rail 4 to the area below the vision inspection module 5; the main body vision camera 53 and the accessory vision camera 54 perform non-contact dimensional inspection on the main body and accessories, respectively, to obtain the main body dimensional data and accessory dimensional data; after the inspection is completed, the accessory high-precision inspection platform 41 transports the accessories to the transfer position 13, and the transfer robot releases the accessories on the transfer position 13 one by one into the empty space on the buffer tray 31 for buffering, and the control motherboard records the buffer material of each accessory. Position 32 and its size data; the control motherboard controls the buffer tray 31 to move along the first direction, the transfer robot to move along the second direction and vertically lift and lower according to the matching result of the main body size data and the accessory size data, and selects the accessories that match the size of each main body from the multiple buffer positions 32 of the buffer tray 31 in reverse; the transfer robot uses an independent drive cylinder to drive each gripper to grab the selected accessories one by one on the buffer tray 31 and transport them to the accessory positioning fixture 43 of the accessory high-precision detection platform 22; the accessory high-precision detection platform 22 transports the matched accessories to the unloading position 12, and the main body high-precision detection platform 21 simultaneously transports the main body to the unloading position 12; the sorting machine simultaneously picks up the main body and appearance accessories at the unloading position 12, completes the material matching and transports them to the subsequent assembly station.

[0036] Secondly, this embodiment also provides a size detection and pairing method applied to the aforementioned size detection and pairing equipment. The starting position of the machine 1 along the first direction is the loading position 11, the ending position of the machine 1 along the first direction is the unloading position 12, and the transfer robot is the transfer position 13. In actual production, the online electronic product production line is sequentially equipped with a loading machine, a size detection and pairing equipment, and a sorting machine along the first direction. The loading machine is located at the loading position 11, and the sorting machine is located at the unloading position 12. Both the loading machine and the sorting machine are existing technology equipment. The loading machine is used to transport the main body and appearance accessories of the product to be assembled to the size detection and pairing equipment, and the sorting machine is used to simultaneously pick up materials at the unloading position 12 of the size detection and pairing equipment, and transport the paired main body and accessories to the subsequent assembly station.

[0037] Reference Figure 7 The size detection and pairing method includes the following steps: S1. Place the main body of the product on the main body high-precision inspection platform 21. The main body high-precision inspection platform 21 transports the main body of the product along the main body inspection guide rail 2 to below the vision inspection module 5. Place the exterior accessories on the accessory high-precision inspection platform 41. The accessory high-precision inspection platform 41 transports the exterior accessories along the accessory inspection guide rail 4 to below the vision inspection module 5. In this step, the loading actions of the main body and accessories can be performed simultaneously or sequentially, without affecting the implementation of this embodiment.

[0038] S2. The main body vision camera 53 performs non-contact dimensional detection on each main body on the main body positioning fixture 22 to obtain the main body dimension data; the accessory vision camera 54 performs non-contact dimensional detection on each accessory on the accessory positioning fixture 43 to obtain the accessory dimension data. Both the main body dimension data and the accessory dimension data are transmitted to the control motherboard for storage and processing.

[0039] S3, the high-precision component inspection platform 41 transports the inspected components to the transfer station 13. The transfer robot then moves the components from the transfer station 13 to multiple buffer positions 32 on the buffer tray 31 for temporary storage. The transfer robot searches for empty positions on the buffer tray 31 and releases the components one by one into the empty positions. The control motherboard records the buffer position 32 of each component and its corresponding component size data.

[0040] Furthermore, after step S3 is completed, the high-precision inspection platform 41 for parts is reset to the loading position 11, ready to receive the next batch of parts.

[0041] S4. Based on the matching results of the main body size data and the accessory size data, the control motherboard controls the buffer tray 31 and the transfer robot to move in coordination, driving the transfer robot to reverse select accessories that match the size of each main body from multiple buffer positions 32.

[0042] Furthermore, in step S4, the control motherboard sorts the main body size data and accessory size data by absolute value or weighted value from smallest to largest, and selects the N accessories with the smallest difference from the multiple cache positions 32 of the cache tray 31 for pairing. N is a positive integer and is consistent with the number of main bodies placed on the main body high-precision detection platform 21.

[0043] S5. The transfer robot drives each gripper to pick up the selected parts one by one from the buffer tray 31 and simultaneously transport them to the part positioning fixture 43 of the high-precision part inspection platform 42. Through the independent drive cylinder of each gripper, the transfer robot can pick up each part sequentially across rows and columns on the buffer tray 31, realizing flexible reverse selection and transportation.

[0044] S6. The high-precision inspection platform 42 for accessories will continue to transport the paired accessories to the unloading position 12, and the high-precision inspection platform 21 for the main body will simultaneously transport the main body to the unloading position 12.

[0045] Furthermore, after step S6 is completed, the high-precision component inspection platform 42 is reset to the intermediate transfer position 13, and the main high-precision inspection platform 21 is reset to the loading position 11, ready to receive the next batch of products. Through the above reset sequence, the staggered operation of the two workstation platforms is realized, ensuring uninterrupted inspection cycle and improving production line efficiency.

[0046] In addition to the steps mentioned above, this embodiment also includes step S0: at the power-on time, the position calibration camera in the vision inspection module 5 verifies the position of the accessories on the buffer tray 31, confirms whether the position code of the accessories is consistent with the physical position, prevents the accessories from being misaligned due to the last power-off or accidental vibration, and ensures the accuracy of the reverse selection action in the subsequent pairing process.

[0047] The working principle and beneficial effects of this method are as follows: The main body vision camera 53 and the accessory vision camera 54 perform non-contact dimensional inspections on each main body on the main body positioning fixture 22 and each accessory on the accessory positioning fixture 43, respectively, to obtain main body dimensional data and accessory dimensional data. The high-precision accessory inspection platform 41 transports the inspected accessories to the transfer station 13. The transfer robot releases the accessories from the transfer station 13 one by one into multiple buffer positions 32 on the buffer tray 31 for temporary storage. The control board records the buffer position 32 where each accessory is located and its corresponding accessory dimensional data, forming a mapping relationship between accessory position and dimensional data. Based on the matching result of the main body dimensional data and accessory dimensional data, the control board controls the buffer tray 31 to move along the first direction and the transfer robot... Moving along the second direction and vertically lifting and lowering, the robot selects the parts closest to the size of each main body from multiple buffer positions 32 in the buffer tray 31, achieving optimal matching between the main body and the parts. This ensures uniform gaps on the appearance assembly surfaces from the source, completely solving the problem of uneven assembly gaps and significantly improving the appearance yield. The transfer robot uses the independent drive cylinders of each gripper to grab the selected parts one by one across rows and columns on the buffer tray 31 and simultaneously transport them to the part positioning fixture 43 of the high-precision part inspection platform 22. The high-precision part inspection platform 22 transports the matched parts to the unloading position 12, and the main body high-precision inspection platform 21 simultaneously transports the main body to the unloading position 12. The sorting machine simultaneously picks up the materials at the unloading position 12, completing the material matching and conveying them to the subsequent assembly station. This method, through a technical approach of dual-station staggered inspection, visual dimension measurement, and buffer platform sorting and pairing, connects the inspection, pairing, and assembly processes on the online production line, saving labor costs for turnover materials and workshop equipment space. The staggered operation design of the high-precision component inspection platform 1 (41) and high-precision component inspection platform 2 (42), along with at least two staggered operation designs for the main high-precision inspection platform 21, ensures that the inspection and pairing processes do not disrupt the production line cycle time, guaranteeing uninterrupted cycle time and no loss of production capacity. The multiple buffer positions 32 on the buffer tray 31 provide ample data samples for reverse selection. It can find the optimal solution from multiple rows and columns of parts, avoiding assembly gap fluctuations caused by segmented random pairing; the position calibration camera verifies the position of the parts on the buffer tray 31 at the time of power-on, confirming whether the position code of the parts is consistent with the physical position, preventing the parts from being misaligned due to the last power-off or accidental vibration, and ensuring the accuracy of the pairing results; it can achieve high-precision assembly with an assembly gap of ≤0.05mm, meeting the stringent appearance standards of mid-to-high-end consumer electronics, and all the size data of the main body, the size data of all parts, and the pairing records are all digitally stored, which facilitates quality traceability and process optimization.

[0048] Based on the disclosure and teachings of the foregoing specification, those skilled in the art can make changes and modifications to the above embodiments. Therefore, the present invention is not limited to the specific embodiments described above, and any obvious improvements, substitutions, or modifications made by those skilled in the art based on the present invention are within the scope of protection of the present invention. Furthermore, although some specific terms are used in this specification, these terms are only for convenience of explanation and do not constitute any limitation on the present invention.

Claims

1. A size detection and pairing device, characterized in that, The system includes a machine base (1), on which a control motherboard is fixedly connected. A main body detection guide rail (2), a buffer translation guide rail (3), and a component detection guide rail (4) are provided on the machine base (1) along a first direction. The main body detection guide rail (2), the buffer translation guide rail (3), and the component detection guide rail (4) are parallel to each other along a second direction, which is perpendicular to the first direction. The main body detection guide rail (2) is slidably connected to a main body high-precision detection platform (21), and the main body high-precision detection platform (21) is provided with multiple main body positioning fixtures (22) for placing the product main body; The buffer translation guide rail (3) is slidably connected to a buffer tray (31), and the buffer tray (31) is provided with multiple buffer slots (32) for temporarily storing accessories; The accessory inspection guide rail (4) is equipped with a high-precision accessory inspection platform one (41) and a high-precision accessory inspection platform two (42). Both the high-precision accessory inspection platform one (41) and the high-precision accessory inspection platform two (42) are equipped with multiple accessory positioning fixtures (43) for positioning accessories. The visual inspection module (5) and the transfer robot extend along the second direction on the machine base (1); The visual inspection module (5) includes a frame (51), a crossbeam (52), a main body visual camera (53), and an accessory visual camera (54). The frame (51) is fixedly connected to the machine base (1). The crossbeam (52) is fixed to the frame (51) and extends along the second direction. The main body visual camera (53) and the accessory visual camera (54) are respectively fixedly connected to both sides of the crossbeam (52). The main body visual camera (53) faces the main body inspection guide rail (2) and is used to perform non-contact size inspection on the main body to obtain the main body size data. The accessory visual camera (54) faces the accessory inspection guide rail (4) and is used to perform non-contact size inspection on the accessory to obtain the accessory size data. The control board is configured to: control the buffer tray (31) to move along the first direction, control the transfer robot to move along the second direction and vertical lifting movement; control the transfer robot to transport the accessories on the high-precision inspection platform one (41) to the buffer tray (31); and according to the matching result of the main body size data and the accessory size data, control the transfer robot to reverse select the accessories that match each main body size from the multiple buffer positions (32) of the buffer tray (31) and transport them to the high-precision inspection platform two (42).

2. The size detection and pairing device according to claim 1, characterized in that, The transfer robot includes a base, a cable chain, a linear guide rail, and a clamping assembly; the base is fixedly connected to the machine tool (1), the cable chain is slidably connected to the base, the cable chain slides along a second direction, the linear guide rail is vertically fixed to the cable chain, the clamping assembly is fixedly connected to the telescopic end of the linear guide rail, the clamping assembly includes multiple independently arranged grippers, each gripper is provided with an independent drive cylinder, the independent drive cylinder is used to control the independent lifting and lowering of the corresponding gripper.

3. The size detection and pairing device according to claim 1, characterized in that, The visual inspection module (5) also includes a position calibration camera; the position calibration camera is fixedly connected to the center of the crossbeam (52) and faces the buffer tray (31).

4. The size detection and pairing device according to claim 1, characterized in that, At least two high-precision detection platforms (21) are provided, and each of the high-precision detection platforms (21) is arranged in an alternating vertical arrangement.

5. The size detection and pairing device according to claim 1, characterized in that, The high-precision testing platform one (41) and the high-precision testing platform two (42) for accessories are arranged in a staggered manner along the vertical direction.

6. A size detection and pairing method, applied to the size detection and pairing device as described in any one of claims 1-5, characterized in that, The starting position of the machine (1) along the first direction is the loading position (11), and the ending position of the machine (1) along the first direction is the unloading position (12); the transfer robot is the transfer position (13), and the pairing method includes the following steps: S1. Place the main body of the product on the main body high-precision inspection platform (21), and the main body high-precision inspection platform (21) transports the main body of the product along the main body inspection guide rail (2) to the bottom of the vision inspection module (5); place the appearance accessories on the accessory high-precision inspection platform one (41), and the accessory high-precision inspection platform one (41) transports the appearance accessories along the accessory inspection guide rail (4) to the bottom of the vision inspection module (5); S2. The main body vision camera (53) performs non-contact size detection on each main body on the main body positioning fixture (22) to obtain the main body size data; the accessory vision camera (54) performs non-contact size detection on each accessory on the accessory positioning fixture (43) to obtain the accessory size data. S3. The high-precision inspection platform (41) of the accessories will transport the accessories after inspection to the transfer station (13), and the transfer robot will transport the accessories on the transfer station (13) to the multiple buffer positions (32) on the buffer tray (31) for temporary storage. S4. The control motherboard controls the buffer tray (31) and the transfer robot to move in coordination according to the matching result of the main body size data and the accessory size data, and drives the transfer robot to reverse select the accessories that match the main body size from multiple buffer positions (32); S5. The transfer robot drives each of the grippers to pick up the selected parts one by one from the buffer tray (31) and simultaneously transport them to the part positioning fixture (43) of the high-precision part detection platform (42). S6. The high-precision inspection platform (42) for accessories will continue to transport the matched accessories to the unloading position (12), and the high-precision inspection platform (21) for the main body will simultaneously transport the main body to the unloading position (12).

7. The size detection and pairing method according to claim 6, characterized in that, In step S4, the control motherboard sorts the main body size data and accessory size data by absolute value or weighted value from smallest to largest, and selects the N accessories with the smallest difference from the multiple cache positions (32) of the cache tray (31) for pairing. The N is a positive integer and is consistent with the number of main bodies placed on the main body high-precision detection platform (21).

8. The size detection and pairing method according to claim 6, characterized in that, After step S3 is completed, the high-precision testing platform for accessories (41) is reset to the loading position (11).

9. A size detection and pairing method according to claim 6, characterized in that, After step S6 is completed, the high-precision testing platform two (42) for accessories is reset to the intermediate position (13).

10. A size detection and pairing method according to claim 6, characterized in that, After step S6 is completed, the main high-precision detection platform (21) is reset to the loading position (11).

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