Man-machine cooperation flexible production line for sheet metal part machining

Abstract

The utility model relates to a man-machine cooperation flexible production line for sheet metal part processing, which is characterized by comprising a sheet metal part integrated production unit formed by a bending operation unit, a press riveting operation unit and a robot operation unit, the bending operation unit is used for receiving a part to be processed and bending and forming the part to be processed, and the press riveting operation unit is used for pressing and riveting the part to be processed. The bending unit is used for bending semi-finished products, the bent semi-finished products are automatically conveyed to the press riveting operation unit, the press riveting operation unit is used for press riveting, visual guidance positioning and turning over of semi-finished product parts, the press-riveted semi-finished products are automatically conveyed to the robot operation unit, and the robot operation unit is used for feeding and discharging through a robot and conducting laser lettering and cleaning. By means of lean layout, moving waste is effectively reduced, accumulation and retention of semi-finished products among procedures are reduced, one-piece flow production is achieved, the production period from production to output is shortened, the production mode that manual operation and robot operation are combined is adopted, labor investment is effectively reduced, and the operation automation level is improved.

Description

Technical Field

[0001] The utility model relates to a flexible production line, in particular to a human-machine collaborative flexible production line for sheet metal processing. Background Art

[0002] In the traditional manufacturing industry, equipment with similar functions are usually placed together to form a work center. According to the independent process route of the product, it enters the next work center from one work center and the products are batched off the production line. This production layout brings too much work-in-progress inventory, unnecessary transportation, unbalanced production and lack of flexibility, which is not conducive to avoiding problems and waste in the production process; material handling and repetitive single operations have long relied on manual labor, which is not conducive to the application and promotion of intelligent production in modern enterprises.

[0003] In the traditional sheet metal chassis guide plate processing, bending equipment, riveting equipment, and laser engraving equipment with similar functions are usually placed in different production areas to form equipment groups for bending, riveting, and laser engraving work centers. According to the process route and production task arrangement of the guide plate, the flat parts are first bent in the bending work center. After completion, they are neatly stacked and transported to the semi-finished product warehouse for reporting and warehousing. When the riveting operation center receives the production schedule, the materials are taken out of the semi-finished product warehouse and transported to the riveting work center for production. After completion, they are neatly stacked and transported to the semi-finished product warehouse for reporting and warehousing. When the laser engraving operation center receives the production schedule, the materials are taken out of the semi-finished product warehouse and transported to the riveting work center for production. , materials are taken out of the semi-finished product warehouse and transported to the laser engraving work center. After completion, they are neatly stacked and transported to the finished product warehouse for reporting and warehousing. This layout mode, in which one work center completes processing and reports and puts it into the warehouse, and then the next work center proceeds according to the production schedule, leads to too much repeated transportation and too much semi-finished product inventory, making its production cycle lengthy and inconvenient to discover problems in the production process. In addition, there are more managers involved in the production process, resulting in a waste of human resources. At the same time, material handling and laser engraving also need to rely on manual operation for a long time. Due to the high labor cost, it is not conducive to the application and promotion of intelligent production in modern enterprises. Summary of the invention

[0004] The purpose of the utility model is to provide a flexible production line for sheet metal processing that effectively reduces movement waste through lean layout, reduces the accumulation and retention of semi-finished products between processes, realizes single-piece flow production, shortens the production cycle from commissioning to output, adopts a production mode that combines manual and robot operations, effectively reduces labor input, and improves the level of operation automation. Human-machine collaborative flexible production line.

[0005] In order to achieve the above-mentioned purpose, the technical solution of the utility model is: a human-machine collaborative flexible production line for sheet metal processing, the innovation of which is: comprising a sheet metal integrated production unit formed by a bending operation unit, a riveting operation unit and a robot operation unit arranged in sequence,

[0006] The bending unit is used to receive the parts to be processed and bend them into shape, and the bent semi-finished products are automatically transported to the riveting unit.

[0007] The riveting unit is used for riveting semi-finished parts, visually guided positioning and flipping, and automatic delivery of riveted semi-finished products to the robot unit.

[0008] The robot operation unit is used for loading and unloading materials by robot, laser engraving and cleaning, and temporary storage of finished parts.

[0009] In the above technical solution, the bending operation unit includes a bending machine, a material rack and a single-stage conveyor. The bending machine performs bending and forming operations on parts. The material rack is used for temporary storage of parts to be bent. The single-stage conveyor is connected between the bending machine and the riveting operation unit, and is used for automatic transportation of semi-finished products, thereby realizing the automatic flow of semi-finished products between processes.

[0010] In the above technical solution, the material rack is constructed with profiles, and a shelf QR code is pasted on the bottom of the material rack to facilitate position identification when the AGV transport robot transports the material rack.

[0011] In the above technical solution, the single-stage conveyor includes a frame, rollers, a conveyor belt, a roller brush, a transmission device and a sensor for detecting whether there is material on the conveyor belt. Rollers rotatably connected to the two ends of the frame are respectively provided. The conveyor belt is transmission-connected to the rollers at both ends of the frame. The transmission device drives the roller at one end of the frame to rotate. A sensor is provided on the frame and at the edge of the conveyor belt. The roller brush is transmission-connected to the transmission device and is used to clean metal debris on the conveyor belt.

[0012] In the above technical solution, the riveting operation unit includes a riveting machine, a double-stage conveyor and a positioning and reversing table. The riveting machine is arranged on one side of the bending operation unit and is used to perform riveting operations on parts. The double-stage conveyor is arranged between the riveting machine and the robot operation unit and is used to convey the semi-finished products after riveting. The positioning and reversing table is arranged adjacent to the double-stage conveyor and close to the robot operation unit and is used to identify the front and back sides of the parts and provide coordinate positions.

[0013] In the above technical solution, the positioning and reversing platform includes a positioning and reversing frame connected to the double-stage conveyor, a lifting module and a visual system. The lifting module is arranged on one side of the positioning and reversing frame and is used to adjust the focal length of parts at different heights. The visual system is arranged on the lifting module. The positioning and reversing frame has adjacently arranged photographing stations and reversing stations. The photographing station is used to receive parts conveyed by the double-stage conveyor, and the visual system is used to identify the front and back sides of the parts and position information.

[0014] In the above technical solution, the robot operation unit includes a robot workstation, and a laser marking machine, a cleaning station and a finished product rack arranged around the robot workstation. The robot workstation automatically takes materials from the riveting operation unit and loads them to the laser marking machine for laser marking. After marking, the robot workstation takes the materials out again and puts them into the cleaning station to remove dust on the surface of the laser marking position. After cleaning, the robot workstation takes out the finished products and stacks them on the finished product rack.

[0015] In the above technical solution, the robot workstation includes a collaborative robot for carrying parts between the riveting unit, the laser marking machine and the cleaning station, and an end effector for loading and unloading the laser marking machine and the cleaning station. The end effector is connected to the collaborative robot via a quick-change joint.

[0016] In the above technical solution, the cleaning station includes a cabinet, and a door opening and closing mechanism, a positioning tool, a cleaning mechanism and a dust collection mechanism arranged inside the cabinet.

[0017] The cabinet is provided with an opening and closing door at the top opening, and one side of the opening and closing door is hingedly connected thereto. The door opening and closing mechanism comprises a cylinder, and a top block is provided at the end of the top rod of the cylinder. The cylinder is driven so that the top block at the end of the top rod of the cylinder drives the other side of the opening and closing door to move and complete the opening or closing of the opening and closing door.

[0018] The positioning tool comprises a positioning tool frame arranged inside the cabinet, and the positioning tool frame is provided with a positioning mold for positioning the parts.

[0019] The cleaning mechanism comprises a linear module arranged inside the cabinet and on one side of the positioning fixture frame, the linear module is provided with a slider, and the slider is provided with a brush head assembly for decontamination and cleaning of the parts.

[0020] The dust collecting mechanism comprises a dust collecting box arranged inside the cabinet, and a dust guiding slot plate connected between the positioning mold and the dust collecting box and arranged obliquely.

[0021] The positive effect of the utility model is that after adopting the human-machine collaborative flexible production line for sheet metal processing of the utility model, since the utility model includes a sheet metal integrated production unit formed by a bending operation unit, a riveting operation unit and a robot operation unit arranged in sequence,

[0022] The bending unit is used to receive the parts to be processed and bend them into shape, and the bent semi-finished products are automatically transported to the riveting unit.

[0023] The riveting unit is used for riveting semi-finished parts, visually guided positioning and flipping, and automatic delivery of riveted semi-finished products to the robot unit.

[0024] The robot operation unit is used to load and unload materials by robot, laser engrave and clean, and temporarily store finished parts.

[0025] Thus, compared with the traditional sheet metal chassis guide plate processing, the flexible production unit of human-machine collaboration adopts a lean layout, and the bending equipment, riveting equipment, and laser engraving equipment are arranged in sequence in the same production unit. Conveyor belts or robots are used between units instead of manual movement and handling, and the logistics are smooth without cross-detours. From the perspective of balanced production rhythm, the bending and riveting equipment can be operated by one person or by two people respectively, and the robot can assist in laser engraving and auxiliary cleaning. Such a production layout enables the guide plate to be produced with the minimum transmission distance, avoids repeated stacking, and the production processes are connected front and back, and the flat parts on the line are After bending, riveting and laser engraving, the finished product is ready when it comes off the line, shortening the production cycle. The single-piece flow production mode can promptly detect quality problems in the process, reduce losses, and reduce the accumulation of semi-finished products in the process. The products that can be processed in the production unit are not limited to guide plates. Sheet metal products with a balanced rhythm of bending, riveting, and laser engraving can be produced. The application of integrated robots and laser equipment replaces manual operation of equipment for automated production, reducing labor cost pressure and improving the level of automation. Compared with the traditional layout, it can avoid unnecessary handling, excessive movement, and excessive work-in-progress caused by uneven production to meet the production needs of multiple varieties and small batches. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a three-dimensional structural schematic diagram of a specific implementation mode of the utility model;

[0027] Figure 2 It is a three-dimensional structural schematic diagram of the bending operation of the utility model;

[0028] Figure 3 It is a three-dimensional schematic diagram of a single-stage conveyor of the utility model;

[0029] Figure 4 It is a three-dimensional structural schematic diagram of the double-stage conveyor and the positioning reversing platform of the utility model;

[0030] Figure 5 It is a three-dimensional structural schematic diagram of the robot operation unit of the utility model;

[0031] Figure 6 It is a three-dimensional structural schematic diagram of the utility model cleaning station. DETAILED DESCRIPTION

[0032] The present invention is further described below in conjunction with the accompanying drawings and given embodiments, but is not limited thereto.

[0033] like Figure 1 , 2As shown in Figures 3, 4, 5 and 6, the utility model aims at the production layout and repetitive operations of the traditional manufacturing industry and provides a human-machine collaborative flexible production line for sheet metal processing, including a sheet metal integrated production unit formed by a bending operation unit 1, a riveting operation unit 2 and a robot operation unit 3 arranged in sequence.

[0034] The bending unit 1 is used to receive the parts to be processed and bend them into shape, and the bent semi-finished products are automatically transported to the riveting unit 2.

[0035] The riveting unit 2 is used for riveting and fixing of semi-finished parts, visual guidance positioning and flipping, and automatic delivery of the riveted semi-finished products to the robot unit 3.

[0036] The robot operation unit 3 is used for loading and unloading materials by robot, laser engraving and cleaning, and temporary storage of finished parts.

[0037] By sorting out the processing technology and production rhythm, forming a family of similar products, arranging the corresponding equipment in a specific order, realizing a lean layout with the best combination of people, machines, materials, methods and environment, and realizing single-piece flow production with minimal handling and minimal labor input; integrating the visual system with the robot to realize automatic grasping guided by the robot under the guidance of the visual system; integrating the robot with the equipment to realize automated production instead of manual work, reducing the labor input of repetitive single production processes and improving the level of production automation.

[0038] The specific structural form is:

[0039] like Figure 1 , 2 As shown in Figure 3, in order to meet the requirements of forming operations for different types of sheet metal parts and seamless connection with the riveting operation unit 2, the bending operation unit 1 includes a bending machine 11, a material rack 12 and a single-stage conveyor 13. The bending machine 11 is combined with a matching mold to bend and form the parts. The material rack 12 is used for temporary storage of the parts to be bent. The single-stage conveyor 13 is connected between the bending machine 11 and the riveting operation unit 2, and is used for automatic transportation of semi-finished products, so as to realize the automatic flow of semi-finished products between processes.

[0040] Furthermore, the use of AGV transport robots to implement intelligent transport in the production unit can replace manual labor, reduce labor cost pressure, and improve the level of automation. The material rack 12 is constructed with 40 profiles to meet the latent dimensions of the AGV transport robot, and a shelf QR code 121 is pasted on the bottom of the material rack 12 to facilitate position identification when the AGV transport robot transports the material rack 12.

[0041] like Figure 3As shown, in order to automatically transfer the bent semi-finished parts to the riveting process, the single-stage conveyor 13 includes a frame 131, rollers 132, a conveyor belt 133, a roller brush 134, a transmission device 135 and a sensor 136 for detecting whether there is material on the conveyor belt. The two ends of the frame 131 are respectively provided with rollers 132 rotatably connected thereto, the conveyor belt 133 is transmission-connected to the rollers 132 at both ends of the frame 131, and the transmission device 135 drives the roller 132 at one end of the frame 131 to rotate. A sensor 136 is provided on the frame 131 and at the edge of the conveyor belt 133. The roller brush 134 is transmission-connected to the transmission device 135 for cleaning metal debris on the conveyor belt 133 to prevent residual debris from scratching the surface of the parts. The single-stage conveyor 13 realizes automatic conveying and cleaning functions when in use.

[0042] Therefore, the bending operation unit 1 described in the utility model is equipped with a material rack 12 that meets the requirements of the AGV handling robot. The QR code of the material rack is used for position identification before the AGV handling robot handles the material. Automatic handling can be implemented if the identification is correct, which has a high degree of automation compared to manual handling. The conveyor has two functions, namely, conveying and cleaning. It automatically conveys semi-finished products to the riveting operation unit 2 to realize the automatic flow of single-piece semi-finished products. The brush roller is linked with the conveying roller to clean the residual metal debris on the surface of the conveyor belt to avoid scratches on the surface of parts, thereby providing protection for the surface of parts.

[0043] like Figure 1 , 4 As shown, in order to implement riveting and fixing operations on semi-finished parts, the riveting operation unit 2 includes a riveting machine 21, a double-stage conveyor 22 and a positioning and reversing table 23. The riveting machine 21 is arranged on one side of the bending operation unit 1, and performs riveting and fastening operations on the parts in combination with a matching mold. The double-stage conveyor 22 is arranged between the riveting machine 21 and the robot operation unit 3, and is used to convey the semi-finished products after riveting. The positioning and reversing table 23 is arranged adjacent to the double-stage conveyor 22 and close to the robot operation unit 3, and is used to identify the front and back sides of the parts and provide the coordinate position to the robot workstation 31. The robot workstation 31 outputs information based on the visual system 233, completes corresponding material picking, turning over and other actions, and realizes the automatic flow of semi-finished products between processes and automatic identification and positioning of parts.

[0044] like Figure 4As shown, in order to identify the front and back sides of the riveted products and facilitate subsequent correct laser marking, the positioning and reversing platform 23 includes a positioning and reversing frame 231 connected to the double-stage conveyor 22, a lifting module 232 and a visual system 233, the lifting module 232 is arranged on one side of the positioning and reversing frame 231, and is used to adjust the focal length of parts at different heights. The visual system 233 is arranged on the lifting module 232, and the positioning and reversing frame 231 has adjacently arranged photographing stations 234 and reversing stations 235, the photographing station 234 is used to receive parts conveyed by the double-stage conveyor 22, and the visual system 233 is used to identify the front and back sides and position information of the parts.

[0045] Therefore, in the riveting operation unit 2 of the utility model, the lifting module 232 adopts a slide module to carry the visual system 233. The slide module facilitates the focal length adjustment of the visual system, so that the visual system is suitable for the identification and positioning of products of various sizes, and realizes flexible and rapid changeover. The visual system identifies the front and back sides of the parts, obtains the coordinate data of the parts, and feeds back the front and back information of the parts to the robot. The robot automatically switches the grasping process and adjusts the direction of the parts to be consistent; the visual system sends the coordinate data of the parts to the robot, and the robot automatically grasps the parts to the robot operation unit based on the coordinate data sent by the visual system, thereby realizing the automatic flow of semi-finished product single-piece flow. The integration of the visual system and the robot improves the level of automation.

[0046] like Figure 5 , 6 As shown, in order to flexibly complete the laser marking, cleaning and stacking of finished products, the robot operation unit 3 includes a robot workstation 31, and a laser marking machine 32, a cleaning station 33 and a finished product rack 34 arranged around the robot workstation 31. The robot workstation 31 automatically takes materials from the riveting operation unit 2 and loads them to the laser marking machine 32 for laser marking. After marking, the robot workstation 31 takes them out again and puts them into the cleaning station 33 to remove dust on the surface of the laser marking position. After cleaning, the robot workstation 31 takes out the finished product and stacks it on the finished product rack 34.

[0047] like Figure 6 As shown, in order to realize automated production after the robot is integrated with the equipment, the robot workstation 31 includes a collaborative robot 311 for carrying parts between the riveting operation unit 2, the laser marking machine 32 and the cleaning station 33, and an end effector 312 for loading and unloading the laser marking machine 32 and the cleaning station 33. The end effector 312 is connected to the collaborative robot 311 via a quick-change connector.

[0048] As shown in the figure, in order to clean the parts after laser marking and remove the stains on the surface of the parts, the cleaning station 33 has a high degree of automation compared to manual cleaning, and effectively avoids the harm of dust inhalation to the human body. The cleaning station 33 includes a cabinet, and a door opening and closing mechanism 331, a positioning tool 332, a cleaning mechanism 333 and a dust collection mechanism 334 arranged inside the cabinet.

[0049] The top opening of the cabinet is provided with an opening and closing door 335, and one side of the opening and closing door 335 is hingedly connected thereto. The door opening and closing mechanism 331 includes a cylinder 3311, and a top block 3312 is provided at the end of the top rod of the cylinder 3311. The cylinder 3311 is driven so that the top block 3312 at the end of the top rod of the cylinder 3311 drives the other side of the opening and closing door 335 to move and complete the opening or closing of the opening and closing door 335.

[0050] The positioning tool 332 includes a positioning tool frame 3321 disposed inside the cabinet, and a positioning mold 3322 for positioning the parts is disposed on the positioning tool frame 3321.

[0051] The cleaning mechanism 333 includes a linear module 3331 disposed inside the cabinet and located on one side of the positioning fixture frame 3321. The linear module 3331 is provided with a slider 3332, and the slider 3332 is provided with a brush head assembly 3333 for cleaning the parts. The brush head in the brush head assembly 3333 is a cotton brush head for removing stains on the surface of the parts.

[0052] The dust collecting mechanism 334 includes a dust collecting box 3341 disposed inside the cabinet, and a dust guide slot plate 3342 connected between the positioning mold 3322 and the dust collecting box 3341 and arranged obliquely.

[0053] Therefore, the robot operation unit 3 described in the utility model adopts the robot to automatically load and unload materials, and is integrated with the system of other equipment in the unit. Compared with manual operation, the degree of automation is high. The robot realizes accurate picking and placement of parts based on the coordinate data obtained from the visual system, and the semi-finished product single-piece flow automatically circulates. The robot is integrated with the equipment in the unit. The robot is responsible for loading and unloading materials. After the equipment processing is completed, the door is automatically opened and the robot is fed back to unload materials to realize automated production. The robot's end effector is compatible with three application scenarios: part flipping, loading and unloading at the laser engraving station, and loading and unloading at the cleaning station. It can reduce the impact of replacing the end effector on the production rhythm and improve production efficiency.

[0054] The robot operation unit 3 adopts an automatic cleaning method. The robot automatically loads the parts after laser engraving to the cleaning station, realizes single-piece flow production through the robot, and uses a cotton brush head to remove stains on the surface of the parts. The soft texture of the brush head can avoid the risk of scratches. Compared with manual cleaning, it has a high degree of automation and effectively avoids the harm of dust inhalation to the human body.

[0055] The specific working process of the utility model is:

[0056] ① The AGV handling robot 4 delivers the profile on the material rack 12 to the processing point. The operator configures the bending mold according to the part drawing, uses the bending machine 11 in combination with the matching mold to bend the profile, and places the semi-finished parts after bending on the conveyor belt 133 of the single-stage conveyor 13. When the sensor 136 at the head position of the conveyor belt 133 detects the presence of parts, the transmission device 135 drives the roller 132 and the roller brush 134 to rotate to convey the semi-finished single-piece flow. The roller brush 134 can clean the metal debris on the conveyor belt 133. The sensor 136 at the end of the conveyor belt 133 detects that the parts are in place, and the conveyor 13 stops running.

[0057] ② The operator configures the riveting die according to the part drawing, takes the semi-finished product from the conveyor 13, uses the riveting machine 21 to perform riveting operations on it, places the semi-finished product on the double-stage conveyor 22, and transports it to the photo taking station 234 of the positioning and reversing frame 231 in a single-piece flow. After it is in place, it stops running. The visual system 233 takes a photo to identify the front and back of the part. If it is a front part, the visual system 233 gives the coordinate position. The robot station 31 grabs it from the front according to the acquired coordinate position and sends it to the next process processing equipment. If it is a back part, the visual system 233 feeds back to the robot station 31 and grabs it to the reversing station 235. The visual system 233 takes a photo again to give the coordinate position. The robot station grabs it from the back according to the guided coordinate position. The robot station completes the reversal by the rotation of its own joints, and then sends it to the next process processing equipment, realizing automatic provision of position coordinates, and providing a data source for the robot station 31 to automatically pick up materials and reversing.

[0058] ③ The robot station is integrated with the laser and cleaning station. The robot station 31 sends the taken materials to the laser marking machine 32 for laser marking. After the processing is completed, it is fed back to the robot station 31 to take materials again. The door opening and closing mechanism 331 controls the cabinet door 335 to open, and automatically loads the materials to the positioning mold 3322 of the positioning tool 332 of the cleaning station 33. The brush head assembly 3333 of the cleaning mechanism 333 removes the surface stains of the parts. After the processing is completed, the robot station takes out the parts again and stacks them on the finished product rack 34.

[0059] According to the above action cycle operation, the products are processed in sequence according to the process, and the human-machine collaborative automation operation is carried out. The products flow off the production line one by one. After completion, the AGV handling robot 4 automatically transports the finished products on the finished product rack 34 to the warehouse material management area.

[0060] In summary, compared with the traditional sheet metal chassis guide plate processing, the flexible production unit of human-machine collaboration adopts a lean layout, and the bending equipment, riveting equipment, and laser engraving equipment are arranged in sequence in the same production unit. Conveyor belts or robots are used between units instead of manual movement and handling. The logistics are smooth without cross-detours. From the perspective of balanced production rhythm, the bending and riveting equipment can be operated by one person or by two people respectively, and the robot can assist in laser engraving and auxiliary cleaning. Such a production layout enables the guide plate to be produced with the minimum transmission distance, avoiding repeated stacking, and the production processes are connected front and back, and the flat parts on the line are After bending, riveting and laser engraving, the finished product is ready when it comes off the line, shortening the production cycle. The single-piece flow production mode can promptly discover quality problems in the process, reduce losses, and reduce the accumulation of semi-finished products in the process. The products that can be processed in the production unit are not limited to guide plates. Sheet metal products with a balanced rhythm of bending, riveting and laser engraving can be produced. The application of integrated robots and laser equipment replaces manual operation of equipment for automated production, reducing labor cost pressure and improving the level of automation. Compared with the traditional layout, it can avoid unnecessary handling, excessive movement, and excessive work-in-progress caused by uneven production to meet the production needs of multiple varieties and small batches.

[0061] Based on the above ideal embodiments of the utility model, the relevant staff can make various changes and modifications without deviating from the technical concept of the utility model through the above description. The technical scope of the utility model is not limited to the content of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A human-machine collaborative flexible production line for sheet metal processing, characterized in that: The invention comprises a sheet metal integrated production unit formed by a bending operation unit (1), a riveting operation unit (2) and a robot operation unit (3) which are arranged in sequence. The bending operation unit (1) is used to receive the parts to be processed and bend them into shape, and the bent semi-finished products are automatically transported to the riveting operation unit (2). The riveting operation unit (2) is used for riveting semi-finished parts, visually guided positioning and flipping, and automatically transporting the riveted semi-finished products to the robot operation unit (3). The robot operation unit (3) is used for loading and unloading materials by robot, laser engraving and cleaning, and temporary storage of finished parts.

2. The human-machine collaborative flexible production line for sheet metal processing according to claim 1, characterized in that: The bending operation unit (1) comprises a bending machine (11), a material rack (12) and a single-stage conveyor (13); the bending machine (11) performs bending and forming operations on parts; the material rack (12) is used to temporarily store parts to be bent; the single-stage conveyor (13) is connected between the bending machine (11) and the riveting operation unit (2) and is used to automatically convey semi-finished products, thereby realizing the automatic transfer of semi-finished products between processes.

3. The human-machine collaborative flexible production line for sheet metal processing according to claim 2, characterized in that: The material rack (12) is constructed with profiles, and a shelf QR code (121) is pasted on the bottom of the material rack (12) to facilitate position identification when the AGV transport robot transports the material rack (12).

4. The human-machine collaborative flexible production line for sheet metal processing according to claim 2, characterized in that: The single-stage conveyor (13) comprises a frame (131), a roller (132), a conveyor belt (133), a roller brush (134), a transmission device (135) and a sensor (136) for detecting whether there is material on the conveyor belt. The two ends of the frame (131) are respectively provided with rollers (132) rotatably connected thereto. The conveyor belt (133) is transmission-connected to the rollers (132) at the two ends of the frame (131). The transmission device (135) drives the roller (132) at one end of the frame (131) to rotate. A sensor (136) is provided on the frame (131) and at the edge of the conveyor belt (133). The roller brush (134) is transmission-connected to the transmission device (135) and is used to clean metal scraps on the conveyor belt (133).

5. The human-machine collaborative flexible production line for sheet metal processing according to claim 1, characterized in that: The riveting operation unit (2) comprises a riveting machine (21), a double-section conveyor (22) and a positioning reversing platform (23); the riveting machine (21) is arranged on one side of the bending operation unit (1) and is used to perform riveting operations on parts; the double-section conveyor (22) is arranged between the riveting machine (21) and the robot operation unit (3) and is used to convey riveted semi-finished products; the positioning reversing platform (23) is arranged adjacent to the double-section conveyor (22) and close to the robot operation unit (3) and is used to identify the front and back sides of the parts and provide coordinate positions.

6. The human-machine collaborative flexible production line for sheet metal processing according to claim 5, characterized in that: The positioning and reversing platform (23) comprises a positioning and reversing frame (231) connected to the double-stage conveyor (22), a lifting module (232) and a visual system (233); the lifting module (232) is arranged on one side of the positioning and reversing frame (231) and is used to adjust the focal length of parts at different heights; the visual system (233) is arranged on the lifting module (232); the positioning and reversing frame (231) has a photographing station (234) and a reversing station (235) arranged adjacently; the photographing station (234) is used to receive parts conveyed by the double-stage conveyor (22); and the visual system (233) is used to identify the front and back sides and position information of the parts.

7. The human-machine collaborative flexible production line for sheet metal processing according to claim 1, characterized in that: The robot operation unit (3) comprises a robot workstation (31), and a laser marking machine (32), a cleaning station (33) and a finished product rack (34) arranged around the robot workstation (31). The robot workstation (31) automatically takes materials from the riveting operation unit (2) and loads the materials to the laser marking machine (32) for laser marking. After the marking is completed, the robot workstation (31) takes the materials out again and puts them into the cleaning station (33) to remove dust on the surface of the laser marking position. After the cleaning is completed, the robot workstation (31) takes out the finished products and stacks them on the finished product rack (34).

8. The human-machine collaborative flexible production line for sheet metal processing according to claim 7, characterized in that: The robot workstation (31) comprises a collaborative robot (311) for carrying parts between a riveting operation unit (2), a laser marking machine (32) and a cleaning station (33), and an end effector (312) for loading and unloading the laser marking machine (32) and the cleaning station (33); the end effector (312) is connected to the collaborative robot (311) via a quick-change joint.

9. The human-machine collaborative flexible production line for sheet metal processing according to claim 7, characterized in that: The cleaning station (33) comprises a cabinet, and a door opening and closing mechanism (331), a positioning tool (332), a cleaning mechanism (333) and a dust collecting mechanism (334) arranged inside the cabinet. An opening and closing door (335) is provided at the top opening of the cabinet, and one side of the opening and closing door (335) is hingedly connected to the cabinet. The door opening and closing mechanism (331) comprises a cylinder (3311), and a top block (3312) is provided at the end of a top rod of the cylinder (3311). The cylinder (3311) is driven so that the top block (3312) at the end of the top rod of the cylinder (3311) drives the other side of the opening and closing door (335) to move, thereby completing the opening or closing of the opening and closing door (335). The positioning tool (332) comprises a positioning tool frame (3321) arranged inside the cabinet, and a positioning mold (3322) for positioning parts is arranged on the positioning tool frame (3321). The cleaning mechanism (333) comprises a linear module (3331) arranged inside the cabinet and located on one side of the positioning fixture frame (3321), the linear module (3331) is provided with a slider (3332), and the slider (3332) is provided with a brush head assembly (3333) for decontaminating and cleaning the parts. The dust collection mechanism (334) comprises a dust collection box (3341) arranged inside the cabinet, and a dust guide slot plate (3342) connected between the positioning mold (3322) and the dust collection box (3341) and arranged obliquely.

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