A production line processing device and a processing method based on digital twinning

Abstract

The application discloses a kind of based on digital twinning production line processing device and processing method, including processing system, processing system includes vertical warehouse system, intelligent turning processing work island, intelligent milling processing work island, intelligent detection marking work island, intelligent automatic assembly work island, AGV car, vertical warehouse system and intelligent automatic assembly work island are respectively located at the two ends of processing system, and vertical warehouse system and intelligent automatic assembly work island are respectively intelligent turning processing work island, intelligent milling processing work island and intelligent detection marking work island between, vertical warehouse system includes double-layer three-dimensional shelf, stacker, in-out warehouse conveying line and task table, one end of in-out warehouse conveying line is cooperated with AGV car, and speed regulation motor, RFID read-write head one and photoelectric switch are equipped on one end of in-out warehouse conveying line.The beneficial effects of the application are: material is moved to AGV car by stacker, and material is conveyed to each processing island by AGV car, to improve the processing efficiency of processing island.

Description

Technical Field

[0001] This invention relates to the technical field of intelligent manufacturing, and in particular to a production line processing device and processing method based on digital twins. Background Technology

[0002] A rigid production line is a standardized production system centered on combination machine tools, specialized equipment, and rigid automation devices, specifically designed for manufacturing specific products or products with similar processes. It completes processing and inspection processes using a fixed cycle sequence, featuring high automation and a single production orientation. It is suitable for large-scale mass production of mature products, requiring an initial one-time investment to reduce marginal costs.

[0003] While existing lathes and milling machines in the workshop can process parts, they still have drawbacks: 1. The utilization rate of lathes and milling machines in the existing rigid production workshop is low. Under conditions of multiple equipment, multiple processes, and multiple constraints, the allocation of task resources is unreasonable, and the total completion time cannot be minimized. 2. Manual material handling consumes time and labor costs. In addition, fatigue can lead to feeding errors during manual material handling, and this problem occurs frequently. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the prior art by using a stacker crane to move materials onto AGV carts and then using AGV carts to transport the materials to various processing islands, thereby improving the processing efficiency of the processing islands. This invention is a production line processing device and method based on digital twins.

[0005] The objective of this invention is achieved through the following technical solution: a production line processing device based on digital twins, comprising a processing system, wherein the processing system includes a vertical warehouse system, an intelligent turning processing island, an intelligent milling processing island, an intelligent inspection and marking island, an intelligent automatic assembly island, and an AGV trolley, wherein the vertical warehouse system and the intelligent automatic assembly island are located at opposite ends of the processing system, and the intelligent turning processing island, the intelligent milling processing island, and the intelligent inspection and marking island are located between the vertical warehouse system and the intelligent automatic assembly island, respectively; The automated storage and retrieval system includes double-layer racking, stacker cranes, inbound and outbound conveyor lines, and task stations. One end of the inbound and outbound conveyor line cooperates with an AGV (Automated Guided Vehicle) trolley, and is equipped with a speed-regulating motor, an RFID reader / writer, and a photoelectric switch. The AGV trolley is equipped with an auxiliary conveyor line, an RFID reader / writer, and a DC speed-regulating motor that cooperates with the inbound and outbound conveyor line. The intelligent turning work island, intelligent milling work island, intelligent inspection and marking work island, and intelligent automatic assembly work island are all equipped with dual conveyor belt docking stations that connect with the AGV trolleys to transport processed materials. The AGV trolleys transport goods from the double-layer racking to the dual conveyor belt docking stations.

[0006] Preferably, the automated storage and retrieval system is equipped with ground rails between the intelligent turning work island, the intelligent milling work island, the intelligent inspection and marking work island, and the intelligent automatic assembly work island, and the bottom of the AGV trolley is in movable cooperation with the ground rails, so as to transport materials to each work island for processing. The length, width and height of the double-layer automated storage and retrieval system are 4760mm×1770mm×3065mm, and the number of AGV trolleys is at least two.

[0007] Preferably, the ground rail includes multiple ground rail sleepers, and the ground rail sleepers are provided with I-shaped guide rails. The ground rail is pre-laid on the ground. Each ground rail is provided with two limit switch slots. The limit switch slots are located at both ends of the ground rail and are provided with limit switches.

[0008] Preferably, the ground rail sleeper plate is provided with a ground rail pressure plate, which is fixed to the ground by bolts. Both ends of the I-shaped guide rail are provided with synchronous belt pads, and a hydraulic damper is provided above the synchronous belt pads. The processing system also includes a PLC control system.

[0009] Preferably, the double-layer automated storage and retrieval system comprises vertical beams and horizontal beams, and a top rail is provided on the top of the double-layer automated storage and retrieval system. Pallets are placed on the bracket formed between the top rail and the vertical beams and horizontal beams of the stacker crane. The pallets are equipped with placement trays, and each pallet includes a square pallet 1 and a square pallet 2, which are arranged opposite each other and fixed with bolts. The automated storage and retrieval system also includes a data monitoring dashboard, an inbound conveyor line, and a task dispatching platform. The double-layer automated storage and retrieval system is equipped with photoelectric position sensors for monitoring the occupancy status of storage locations.

[0010] Preferably, the intelligent turning machining work island consists of a K42 CNC lathe, a FANUC industrial robot, a dual conveyor belt docking station, a line-side warehouse, and a fixture library. The line-side warehouse buffers materials. The milling machining work island consists of a V6 vertical machining center, a FANUC industrial robot, a dual conveyor belt docking station, a line-side warehouse, and a fixture library. Preferably, the intelligent inspection and marking work island further includes an inspection system, a marking system, a FANUC industrial robot, a line-side warehouse, and a fixture library. The marking system includes a marking table, a marking mobile platform, and a marking management system. The stacker crane is used to pick up materials and transport them to the inbound / outbound conveyor line. The stacker crane includes a column assembly, and an electrical cabinet assembly is located at the bottom of the column assembly. A drag chain is located at the bottom of the stacker crane. A limit module is located above the column assembly, and a column idler wheel mounting bracket is located above the limit module. A hydraulic buffer is located at the top of the column idler wheel mounting bracket.

[0011] Preferably, the intelligent automatic assembly work island includes an assembly station and an assembly table. The assembly table includes a dual collaborative robot, a fixture library, a positioning platform, an assembly material table, and a stamping mechanism. An upper fork and a middle fork are provided on one side of the column assembly. An MC40 motor is provided at the bottom of the middle fork. The upper fork and the middle fork can move left and right, while the overhead rail and the top of the stacker crane are limited to move.

[0012] Preferably, the AGV includes a vehicle body, a charging pile, a navigation and positioning module, and a host computer management system. When the host computer management system issues a target location, the AGV receives the instruction and travels to the designated location to perform material picking and placing operations. The stacker crane uses the upper and middle forks to pick up and place materials on the placement tray and places the placement tray on the inbound and outbound conveyor line.

[0013] The processing method of the production line processing device based on digital twin of the present invention includes the following steps: S1. After the task is issued, the task information is synchronized to the automated storage and retrieval system (AS / RS) and the control layer. Upon receiving the instruction, the AS / RS initiates the outbound process and returns the stacker crane to zero. Simultaneously, the AGV (Automated Guided Vehicle) moves to the inbound / outbound conveyor line in the AS / RS. S11. The stacker crane removes the material from the pallet under the action of the upper and middle forks and places it on the inbound / outbound conveyor line, and moves the pallet on the inbound / outbound conveyor line to the input line on the AGV trolley. After the S12 AGV trolley is loaded with materials, it is transported to the intelligent turning processing island, intelligent milling processing island, intelligent inspection and marking island, and intelligent automatic assembly island via ground rail. S13. The robotic arms on the intelligent turning work island, intelligent milling work island, intelligent inspection and marking work island, or intelligent automatic assembly work island take out the materials from the AGV and place them in the line-side warehouse for processing. The present invention has the following advantages: 1. The processing system of this invention integrates a vertical storage system, an intelligent turning work island, an intelligent milling work island, an intelligent inspection and marking work island, an intelligent automatic assembly work island, and an AGV trolley. Materials to be processed are placed in the vertical storage system. When material retrieval is required, a stacker crane removes the material from the pallet in the vertical storage system and places the pallet into the inbound / outbound conveyor line via its lifting mechanism. The inbound / outbound conveyor line is connected to the auxiliary conveyor line on the AGV trolley. Once the pallet is stable on the AGV trolley, the AGV trolley, guided by a ground rail, delivers the material to the designated processing island, ensuring efficient cyclic processing of the machine, reducing machine downtime, and improving efficiency.

[0014] 2. The stacker crane of the present invention is located between double-layer three-dimensional racks, and the bottom of the stacker crane is guided horizontally by a drag chain, which enables the stacker crane to easily take out and place the placement plates on the double-layer three-dimensional racks, thereby improving the placement and retrieval of the processed materials and saving the process retrieval time.

[0015] 3. In this invention, the stacker crane first retrieves materials from the automated storage and retrieval system (AS / RS) and places them on the inbound / outbound conveyor line. The materials are then transported to the AGV (Automated Guided Vehicle) docking point. After receiving the materials, the AGV transfers them to the corresponding processing center's conveyor belt docking station. Subsequently, the robot picks up the materials from the docking station and sends them to the processing center for processing. After processing, the robot retrieves the finished product and returns it to the docking station. Finally, the AGV transports the finished product back to the inbound / outbound conveyor line, and the stacker crane sends it back to the AS / RS to complete the warehousing process, forming a complete closed-loop material flow and saving workpiece transfer and processing time. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the processing system of the present invention; Figure 2 This is a schematic diagram of the double-layer three-dimensional shelving system in this invention; Figure 3 This is a schematic diagram of the three-dimensional structure of the double-layer three-dimensional shelving in this invention; Figure 4 This is a schematic diagram of the AGV trolley and the inbound / outbound conveyor line in this invention; Figure 5 This is a schematic diagram of the AGV vehicle in this invention; Figure 6 This is a schematic diagram of the stacker crane in this invention; Figure 7 This is a schematic diagram of the ground track structure in this invention; Figure 8 for Figure 1 A magnified view of a portion of point A in the middle; Figure 9 This is a schematic diagram of the manufacturing process of the gyroscope in this invention; Figure 10 This is a schematic diagram of the gyroscope structure after processing in Example 1; Figure 11 This is a schematic diagram of the structure of the zodiac commemorative piece after processing in Example 2; Figure 12 This is a schematic diagram of the storage box after processing in Example 3.

[0017] In the diagram, the components are: 1. Machining System; 2. Automated Warehouse System; 3. Intelligent Turning Machining Work Island; 4. Intelligent Milling Machining Work Island; 5. Intelligent Inspection and Marking Work Island; 6. Intelligent Automated Assembly Work Island; 7. AGV Cart; 8. Double-Layer Automated Shelving; 9. Stacker Crane; 10. Inbound / Outbound Conveyor Line; 11. Speed-Regulating Motor; 12. RFID Reader / Writer One; 13. Photoelectric Switch; 14. Auxiliary Conveyor Line; 15. RFID Reader / Writer Two; 16. DC Speed-Regulating Motor; 17. Dual Conveyor Belt Connector; 18. Floor Rail; 19. Floor Rail Sleeper; 10. I-Shaped Guide Rail. 20. Limit switch slot plate; 21. Limit switch; 22. Ground rail pressure plate; 23. Synchronous belt pad; 24. Hydraulic damper; 25. Vertical beam; 26. Horizontal beam; 27. Ceiling rail; 28. Column idler wheel mounting bracket; 29. ​​Square pallet one; 30. Placement tray; 31. Square pallet two; 32. Lineside warehouse; 33. Marking system; 34. Column assembly; 35. Electrical cabinet assembly; 36. Limit module; 37. Hydraulic damper; 38. Assembly station; 39. Assembly table; 40. Upper fork; 41. Middle fork; 42. MC40 motor; 43. Detailed Implementation The present invention will be further described below with reference to the accompanying drawings. The scope of protection of the present invention is not limited to the following description: like Figure 1 As shown, a production line processing device based on digital twins includes a processing system 1. The processing system 1 includes a vertical warehouse system 2, an intelligent turning processing island 3, an intelligent milling processing island 4, an intelligent inspection and marking processing island 5, an intelligent automatic assembly processing island 6, and an AGV trolley 7. The vertical warehouse system 2 and the intelligent automatic assembly processing island 6 are located at opposite ends of the processing system, and the intelligent turning processing island 3, the intelligent milling processing island 4, and the intelligent inspection and marking processing island 5 are located between the vertical warehouse system 2 and the intelligent automatic assembly processing island 6, respectively. The multiple processing islands are arranged in a straight line, which allows the AGV trolley to conveniently transport materials to each processing island. like Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 8The automated storage and retrieval system 1 of this invention includes a double-layer racking system 8, a stacker crane 9, an inbound / outbound conveyor line 10, and a workbench. The double-layer racking system 8 has the same height on both sides and leaves space in the middle for the stacker crane 9. The tops of the double-layer racking system 8 are interconnected. The double-layer racking system 8 can hold processed and unprocessed workpieces. One end of the inbound / outbound conveyor line 10 cooperates with an AGV trolley 7, allowing the pallets on the inbound / outbound conveyor line 10 to be transferred to the AGV trolley. A speed-regulating motor 11, an RFID reader / writer 12, and a photoelectric switch 13 are provided at one end of the inbound / outbound conveyor line 10. The installation of 12 and photoelectric switch 13 enables real-time monitoring and transfer of the placement tray 31. The AGV trolley 7 is equipped with an auxiliary conveyor line 14 that works with the inbound / outbound conveyor line 10, an RFID reader / writer 15, and a DC speed-regulating motor 16. The intelligent turning work island 3, intelligent milling work island 4, intelligent inspection and marking work island 5, and intelligent automatic assembly work island 6 are all equipped with a double conveyor belt docking platform 17 that docks with the AGV trolley 7 to transport processed materials. The AGV trolley 7 transports the goods on the double-layer three-dimensional shelf 8 to the double conveyor belt docking platform 17, effectively saving the transfer time of the materials to be processed.

[0018] like Figure 7 As shown, the aforementioned automated storage and retrieval system 2 is connected to the intelligent turning work island 3, intelligent milling work island 4, intelligent inspection and marking work island 5, and intelligent automatic assembly work island 6 by ground rails 18. The bottom of the AGV trolley 7 moves in conjunction with the ground rails 18, thereby transporting materials to each work island for processing. The dimensions of the double-layer automated storage and retrieval system 8 are 4760mm × 1770mm × 3065mm, respectively. The dimensions of the double-layer automated storage and retrieval system 8 can be appropriately increased or decreased according to the actual situation. There must be at least two AGV trolleys 7, and it should be ensured that the intelligent turning work island 3, intelligent milling work island 4, intelligent inspection and marking work island 5, and intelligent automatic assembly work island 6 can process the parts to be processed. The inspection table in the intelligent inspection and marking work island 5 is model CNC-3020, and the marking table is model MY-F30.

[0019] The ground rail 18 of the present invention includes multiple ground rail sleeper plates 19, and I-shaped guide rails 20 are provided on the ground rail sleeper plates 19. Positioning QR codes are provided between the I-shaped guide rails 20 to ensure the accurate movement position of the AGV trolley. The ground rail 18 is pre-laid on the ground. Each ground rail 18 is provided with two limit switch slot plates 21. The limit switch slot plates 21 are located at both ends of the ground rail 18, and limit switches 22 are provided on the limit switch slot plates 21.

[0020] The aforementioned ground rail sleeper plate 19 is provided with a ground rail pressure plate 23, which is fixed to the ground by bolts to make the ground rail stable and fixed. Both ends of the I-shaped guide rail 20 are provided with synchronous belt pads 24, and a hydraulic buffer 25 is provided above the synchronous belt pads 24. The hydraulic buffer 25 is used to slow down the AGV trolley after reaching the end of the I-shaped guide rail 20. The processing system 1 also includes a PLC control system. The PLC control system is existing equipment and was purchased from the market.

[0021] The double-layer automated storage and retrieval system 8 in this invention comprises vertical beams 26 and horizontal beams 27. A top rail 28 is provided on the top of the double-layer automated storage and retrieval system 8. The top rail 28 slides in cooperation with the through holes on the column idler wheel mounting bracket 29 of the stacker crane 9. A pallet is placed on the bracket formed between the vertical beams 26 and the horizontal beams 27. A placement tray 31 is placed on the pallet, and the pallet includes a square tray 30 and a square tray 32, which are arranged opposite each other and fixed with bolts. The automated storage and retrieval system 2 also includes a data monitoring dashboard and a task distribution platform. Both the data monitoring dashboard and the task distribution platform are commercially available and are existing technologies. The double-layer automated storage and retrieval system 8 is equipped with photoelectric position sensors, which are also commercially available and used to detect whether a placement tray has been placed and to monitor the occupancy status of the storage space. The automated storage and retrieval system 2 has a total of 2 rows, 8 columns, and 5 layers. The length, width, and height dimensions of each storage space formed by the square tray 30 and the square tray 32 are as follows: .

[0022] The aforementioned intelligent turning machining island 3 consists of a K42 CNC lathe, a FANUC industrial robot, a dual conveyor belt docking station 17, a line-side warehouse 33, and a fixture library. The K42 CNC lathe, FANUC industrial robot, and fixture library are all existing common technologies. The K42 CNC lathe is mainly responsible for machining external diameters, end faces, and other structural features. The line-side warehouse 33 buffers materials. The milling machining island 4 consists of a V6 vertical machining center, a FANUC industrial robot, a dual conveyor belt docking station 17, a line-side warehouse 33, and a fixture library. The V6 vertical machining center, FANUC industrial robot, and fixture library are all existing technologies. The V6 vertical machining center mainly undertakes milling, drilling, boring, and other machining operations on workpieces. The intelligent turning machining island 3 and milling machining island 4 include an M-10iD / 12 robot, a CY-K42 CNC lathe, and a CY-V6 vertical machining center. The 12-axis robot has 6 joint axes, a maximum load capacity of 12kg, a maximum working radius of 1441mm, and a repeatability of ±0.02mm. The CY-K42 CNC lathe has dimensions of 2800mm (length), 1700mm (width), and 1700mm (height), a maximum turning diameter of 420mm on the bed, a maximum turning diameter of 250mm on the slide, X / Z axis travel of 210mm / 400mm, a center distance of 400-550mm, and a horizontal eight-station tool post system. The CY-V6 vertical machining center has dimensions of 2100mm (length), 2340mm (width), and 2510mm (height), a worktable length and width of 700mm and 420mm, a maximum load capacity of 400kg, XYZ axis travel of 600mm, 4000mm, and 420mm, and a spindle-to-worktable distance of 170mm-590mm. The aforementioned intelligent inspection and marking work island 5 also includes an inspection system, a marking system 34, a FANUC industrial robot, a line-side warehouse 33, and a fixture library. The inspection system, the FANUC industrial robot, and the fixture library are all existing technologies. The marking system 34 includes a marking table, a marking mobile platform, and a marking management system, which are also existing technologies. The stacker crane 9 is used to pick up materials and transport them to the inbound / outbound conveyor line 10. The stacker crane 9 includes a column assembly 35, and the height of the stacker crane 9 is 2.7m. An electrical cabinet assembly 36 is located at the bottom of the column assembly 35. A drag chain is located at the bottom of the stacker crane 9. A limit module 37 is located above the column assembly 35, and a column idler wheel mounting bracket 29 is located above the limit module 37. A hydraulic buffer 38 is located on the top of the column idler wheel mounting bracket 29.

[0023] The aforementioned intelligent automated assembly work island 6 includes an assembly station 39 and an assembly table 40. The intelligent automated assembly work island 6 is mainly responsible for loading, unloading, and storing the processed parts. The assembly table 40 includes a dual collaborative robot, a fixture library, a positioning platform, an assembly material table, and a stamping mechanism. The fixture library, positioning platform, assembly material table, and stamping mechanism are all existing technologies. An upper fork 41 and a middle fork 42 are provided on one side of the column assembly 35. An MC40 motor 43 is provided on the bottom of the middle fork 42. The upper fork 41 and the middle fork 42 can move left and right. The top surface of the upper fork 41 is provided with anti-slip protrusions. At the same time, the overhead rail 28 and the top of the stacker crane 9 are limited to move. The dual collaborative robot is an AUBO i5.

[0024] The AGV trolley 7 in this application also includes the trolley body, charging pile, navigation and positioning module, and host computer management system. The charging pile, navigation and positioning module, and host computer management system are all existing technologies. When the host computer management system issues a target location, the AGV trolley 7 receives the instruction and drives to the designated location to perform material picking and placing operations. The stacker crane 9 picks up and places materials on the placement tray 31 through the upper fork 41 and the middle fork 42, and places the placement tray 31 on the inbound and outbound conveyor line 10.

[0025] The aforementioned processing method for a production line processing device based on digital twins includes the following steps: Based on the composition of the production line equipment and the characteristics of the processed objects, the process flow includes order placement, raw material issuance, material distribution, processing and manufacturing, quality inspection, assembly operations, and finished product warehousing. A complete process flow is as follows: Figure 9 As shown.

[0026] First, the system issues a production task, and the task information is synchronized to the automated warehouse system 2 and the PLC control system. After receiving the instruction, the automated warehouse system 2 initiates the outbound process and returns the stacker crane 9 to zero. After the AGV trolley 7 moves to the discharge port of the double-layer automated warehouse, the stacker crane 9 retrieves the material placement tray 31 from the designated location. The material is identified by an RFID reader to verify the consistency between the material and the order. If the verification fails, the system triggers an alarm and prompts manual troubleshooting. If the verification is correct, the AGV trolley 7 loads the material and proceeds to the corresponding work island according to the material's process flow.

[0027] During processing, after the AGV trolley 7 arrives at the workstation, it transports the materials to the connecting platform. A robot (using existing robotic arms) then picks up and loads the materials, executing the corresponding processing steps according to the workpiece type. After the corresponding process is completed, the workpiece is transferred to the inspection station for dimensional inspection to verify product quality. Workpieces that fail inspection are automatically diverted to the recycling area and not processed further; workpieces that pass inspection continue to circulate. For example, gyroscopes are transferred to the assembly unit for bearing pressing and magnetic end cap installation, while other products directly begin the warehousing process. Workpieces completed in all processes are retrieved by the AGV trolley 7 and transported to the storage entrance of the automated warehouse system 2. Before warehousing, an RFID writer writes information such as the material number, processing batch, and inspection results onto the tag. Then, the stacker crane 9 stores the finished product in the designated location according to instructions, finally updating the warehouse database. Example 1 The method for processing a gyroscope using the above-described device and method is as follows; Gyroscope-type products consist of a gyroscope body, precision bearings, a pressure ring, and magnetic end caps. The overall structure is a rotating body, resembling a wheel hub-like disc in appearance, with a bearing mounting hole in the center and magnetic end caps on both sides. The products require high rotational balance and excellent axial concentricity. The main machining features of the parts include the outer cylindrical contour, the hub, the central bearing hole, and the end faces on both sides.

[0028] The manufacturing process for gyroscopes includes: turning, which mainly involves turning the end face and outer diameter reference on a CNC lathe and precision turning the outer diameter contour to the required dimensions; then, milling the hub groove structure and drilling and boring the center through hole and bearing mounting stepped hole in a compound milling process; next, dimensional inspection is carried out, with the outer diameter and concentricity being inspected by an inspection table; finally, the finished product is assembled on an assembly table, where miniature bearings and pressure rings are press-fitted, and the magnetic end cap is assembled by suction.

[0029] Example 2 The main feature of zodiac-themed items is planar marking. After the basic cylindrical surface is formed, zodiac patterns are formed on the surface through marking units. There are certain requirements for surface flatness and pattern clarity. The processing method is as follows: First, the outer shape is turned on a CNC lathe. After turning the outer circle of the cylindrical blank, the end face is cut off and trimmed. The end face is milled on the intelligent milling processing island. Second, the pattern is engraved on the zodiac piece using a laser. Finally, the integrity of the engraving and surface defects are checked on the dimensional table.

[0030] Example 3 The storage box is a storage device for the spinning top and zodiac figurines. Its structure is a typical deep-cavity thin-walled cylinder, which has low requirements for dimensional accuracy. The processing method is as follows: first, the outer circle contour is turned on a CNC lathe, and the internal deep cavity structure is turned. Then, the top surface is milled in the intelligent milling machining island. Finally, the inner cavity diameter and depth are measured on the inspection table.

[0031] The aforementioned gyroscopes, zodiac-themed parts, and storage boxes are all placed on double-layer three-dimensional shelves 8. They are then transported to AGV carts 7 by stacker cranes 9 and inbound / outbound conveyor lines 10. The AGV carts 7 transport the materials to be processed to intelligent turning work islands 3, 4, 5, and 6 for intelligent inspection and marking work islands 5 and 6 for processing. In this embodiment, the gyroscopes and zodiac-themed parts are stored in the storage boxes.

[0032] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A production line processing device based on digital twins, characterized in that: The system includes a machining system (1), which includes a vertical storage system (2), an intelligent turning machining island (3), an intelligent milling machining island (4), an intelligent inspection and marking island (5), an intelligent automatic assembly island (6), and an AGV trolley (7). The vertical storage system (2) and the intelligent automatic assembly island (6) are located at opposite ends of the machining system (1), and the vertical storage system (2) and the intelligent automatic assembly island (6) are respectively connected to the intelligent turning machining island (3), the intelligent milling machining island (4), and the intelligent inspection and marking island (5). The automated storage and retrieval system (2) includes a double-layer three-dimensional rack (8), a stacker crane (9), an inbound and outbound conveyor line (10), and a task station. One end of the inbound and outbound conveyor line (10) is connected to the AGV trolley (7), and one end of the inbound and outbound conveyor line (10) is equipped with a speed-regulating motor (11), an RFID reader / writer (12), and a photoelectric switch (13). The AGV trolley (7) is equipped with an auxiliary conveyor line (14), an RFID reader / writer (15), and a DC speed-regulating motor (16) (11) that are connected to the inbound and outbound conveyor line (10). The intelligent turning processing island (3), the intelligent milling processing island (4), the intelligent inspection and marking island (5), and the intelligent automatic assembly island (6) are all equipped with a double conveyor belt docking station (17) that connects with the AGV trolley (7) to transport the processed materials. The AGV trolley (7) transports the goods on the double-layer three-dimensional rack (8) to the double conveyor belt docking station (17).

2. The production line processing device based on digital twin according to claim 1, characterized in that: The automated storage and retrieval system (2) is connected to the intelligent turning work island (3), intelligent milling work island (4), intelligent inspection and marking work island (5), and intelligent automatic assembly work island (6) by floor rails (18). The bottom of the AGV trolley (7) is in movable cooperation with the floor rails (18), thereby transporting materials to each work island for processing. The length, width, and height dimensions of the double-layer automated storage and retrieval system (8) are as follows: The number of AGV vehicles (7) is at least two.

3. A production line processing device based on digital twins according to claim 2, characterized in that: The ground rail (18) includes multiple ground rail sleepers (19), and the ground rail sleepers (19) are provided with I-shaped guide rails (20). The ground rail (18) is laid on the ground in advance. Each ground rail (18) is provided with two limit switch slots (21). The limit switch slots (21) are located at both ends of the ground rail (18), and the limit switch slots (21) are provided with limit switches (22).

4. A production line processing device based on digital twins according to claim 3, characterized in that: The ground rail sleeper plate (19) is provided with a ground rail pressure plate (23), which is fixed to the ground by bolts. Both ends of the I-shaped guide rail (20) are provided with synchronous belt pads (24), and a hydraulic buffer (25) is provided above the synchronous belt pads (24). The processing system (1) also includes a PLC control system.

5. A production line processing device based on digital twins according to claim 1, characterized in that: The double-layer three-dimensional rack (8) consists of vertical beams (26) and horizontal beams (27), and a top rail (28) is provided on the top of the double-layer three-dimensional rack (8). A pallet is placed on the bracket formed between the vertical beams (26) and the horizontal beams (27). A placement tray (31) is placed on the pallet, and the pallet includes a square tray one (30) and a square tray two (32). The square tray one (30) and the square tray two (32) are arranged opposite each other and are fixed by bolts. The automated warehouse system (2) also includes a data monitoring board, an inbound conveyor line, and a task distribution platform. The double-layer three-dimensional rack (8) is equipped with a photoelectric position sensor, which is used to monitor the occupancy status of the warehouse location.

6. The production line processing device and processing method based on digital twin according to claim 1, characterized in that: The intelligent turning machining work island (3) consists of a K42 CNC lathe, a FANUC industrial robot, a double conveyor belt docking station (17), a line-side warehouse (33), and a fixture library. The line-side warehouse (33) buffers materials. The milling machining work island consists of a V6 vertical machining center, a FANUC industrial robot, a double conveyor belt docking station (17), a line-side warehouse (33), and a fixture library.

7. A production line processing device based on digital twins according to claim 1, characterized in that: The intelligent inspection and marking work island (5) also includes an inspection system, a marking system (34), a FANUC industrial robot, a line-side warehouse (33), and a fixture library. The marking system (34) includes a marking table, a marking mobile platform, and a marking management system. The stacker crane (9) is used to pick up materials and transfer them to the inbound and outbound conveyor line (10). The stacker crane (9) includes a column assembly (35), and an electrical cabinet assembly (36) is provided on the bottom of the column assembly (35). A drag chain is provided on the bottom of the stacker crane (9). A limit module (37) is provided above the column assembly (35), and a column idler wheel mounting bracket (29) is provided above the limit module (37). A hydraulic buffer (25) is provided on the top of the column idler wheel mounting bracket (29).

8. A production line processing device based on digital twins according to claim 7, characterized in that: The intelligent automatic assembly work island (6) includes an assembly station (39) and an assembly table (40). The assembly table (40) includes a dual collaborative robot, a fixture library, a positioning platform, an assembly material table, and a stamping mechanism. An upper fork (41) and a middle fork (42) are provided on one side of the column assembly (35). An MC40 motor (43) is provided on the bottom of the middle fork (42). The upper fork (41) and the middle fork (42) move left and right, while the overhead rail (28) and the top of the stacker crane (9) move in a limited position.

9. A production line processing device based on digital twins according to claim 8, characterized in that: The AGV (7) includes the vehicle body, charging pile, navigation and positioning module, and host computer management system. When the host computer management system sends the target location, the AGV (7) receives the instruction and drives to the designated location to perform the material picking and placing operation. The stacker (9) picks up and places the placement tray (31) through the upper fork (41) and the middle fork (42), and places the placement tray (31) on the inbound and outbound conveyor line (10).

10. A processing method for a production line processing device based on digital twins according to any one of claims 1 to 9, characterized in that: Includes the following steps: S1. After the task is issued, the task information is synchronized to the automated warehouse system (2) and the control layer. After receiving the instruction, the automated warehouse system (2) starts the outbound process and returns the stacker crane (9) to zero. At the same time, the AGV trolley (7) drives onto the inbound and outbound conveyor line (10) in the automated warehouse system (2): S2. The stacker crane (9) takes out the material on the placement tray (31) under the action of the upper fork (41) and the middle fork (42) and places it on the inbound / outbound conveyor line (10). The placement tray (31) on the inbound / outbound conveyor line (10) is moved to the input line on the AGV trolley (7). S3. After the AGV trolley (7) is loaded with materials, it is transported to the intelligent turning processing work island (3), intelligent milling processing work island (4), intelligent inspection and marking work island (5), and intelligent automatic assembly work island (6) via the ground rail (18). S4. The robotic arms on the intelligent turning work island (3), intelligent milling work island (4), intelligent inspection and marking work island (5), or intelligent automatic assembly work island (6) take out the materials on the AGV car (7) and place them on the line-side warehouse (33) for processing.

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