Automatic hub production system

Abstract

The invention discloses an automatic hub production system. Comprising a stepped hole drilling device used for drilling stepped holes in workpieces, a through hole drilling device used for drilling through holes in the workpieces, an outer bearing sleeve press-fitting device used for press-fitting outer bearing sleeves on the workpieces, a first conveying line body, a second conveying line body and an inner bearing sleeve press-fitting device used for press-fitting inner bearing sleeves on the workpieces. The bolt pressing device is used for pressing bolts on the workpieces; the bolt protective sleeve assembling device is used for installing bolt protective sleeves on the bolts; and the third conveying line body is used for conveying the workpieces on which the bolts are pressed to the bolt protective sleeve assembling device. According to the automatic hub production system, automatic control over transferring, grabbing, feeding, discharging and boxing of hub workpieces can be achieved, the installation efficiency is improved, the labor intensity of operators is reduced, and the precision can be reliably guaranteed.

Description

Technical Field

[0001] The present invention belongs to the technical field of automated production equipment. Specifically, the present invention relates to a hub automated production system. Background Art

[0002] In the traditional hub production process, there are multiple processes including drilling, press-fitting, online spraying and drying, packaging and palletizing, etc. Manual operation of corresponding processing equipment is used to complete each process, and workpieces are transported between each process for the next operation.

[0003] Due to the low efficiency of traditional manual operation, high labor intensity, different workers also have differences in quality control, it is difficult for the same worker to ensure continuous and stable process quality for a long time, and there are many situations of non-standard processes, which affect the overall quality of the product.

[0004] Combining the above existing problems, traditional manual operation production cannot meet the production and quality control requirements of modern industry, and it is difficult to meet the urgent needs for efficiency and production standards in modern industry. Summary of the Invention

[0005] The present invention aims to solve at least one of the technical problems existing in the prior art. For this purpose, the present invention provides a hub automated production system, aiming to improve the hub production efficiency.

[0006] To achieve the above object, the technical solution adopted by the present invention is: a hub automated production system, including a stepped hole drilling device disposed at the stepped hole drilling station and used for drilling stepped holes on the workpiece, a first conveyor line body used for transporting the workpiece to the stepped hole drilling station, a through hole drilling device disposed at the through hole drilling station and used for drilling through holes on the workpiece, an outer bearing sleeve press-fitting device used for press-fitting the outer bearing sleeve on the workpiece, a second conveyor line body used for transporting the workpiece at the through hole drilling station to the outer bearing sleeve press-fitting device, an inner bearing sleeve press-fitting device used for press-fitting the inner bearing sleeve on the workpiece, a bolt press-fitting device used for press-fitting bolts on the workpiece, a bolt protection sleeve assembly device used for installing the bolt protection sleeve on the bolt, and a third conveyor line body used for transporting the workpiece with the bolt press-fitted to the bolt protection sleeve assembly device.

[0007] The stepped hole drilling device includes a first machine tool for drilling stepped holes on the workpiece and a ninth robot for picking up the workpiece located on the first conveyor line body and transporting the workpiece to the first machine tool.

[0008] The through-hole drilling device includes a second machine tool for drilling through-holes in the workpiece, and an eighth robot for picking up the workpiece after the stepped-hole drilling is completed and transporting the workpiece to the second machine tool. A first transfer table for placing the workpiece is arranged between the first machine tool and the second machine tool, and the first transfer table is located between the first conveyor line body and the second conveyor line body.

[0009] The outer bearing sleeve press-fitting device includes a third machine tool, a seventh transfer table for placing the outer bearing sleeve, a sixth robot for picking up the outer bearing sleeve and placing the outer bearing sleeve in the press-fitting hole of the workpiece, and a seventh robot for picking up the workpiece located on the second conveyor line body and transporting the workpiece to the third machine tool.

[0010] The inner bearing sleeve press-fitting device includes a fourth machine tool, a second transfer table for placing the workpiece with the outer bearing sleeve press-fitted, a sixth transfer table for placing the inner bearing sleeve, and a fifth robot for picking up the workpiece with the outer bearing sleeve press-fitted and placing the workpiece on the fourth machine tool. The fifth robot is configured to place the inner bearing sleeve in the press-fitting hole of the workpiece.

[0011] The second transfer table is located between the sixth transfer table and the fourth machine tool.

[0012] The bolt press-fitting device includes a fifth machine tool, a third transfer table for placing the workpiece with the inner bearing sleeve press-fitted, a second industrial camera for collecting images of the workpiece placed on the third transfer table, a first robot for picking up the bolt and placing the bolt in the bolt hole of the workpiece, and a fourth robot for picking up the workpiece located on the third transfer table and placing the workpiece on the fifth machine tool.

[0013] The bolt protection sleeve assembly device includes a fourth transfer table, a fifth transfer table, a second robot for grasping the protection sleeve at the protection sleeve vibrating feeder arranged on the fourth transfer table and sleeving the protection sleeve on the bolt of the workpiece, and a third robot for grasping the protection sleeve at the protection sleeve vibrating feeder arranged on the fifth transfer table and sleeving the protection sleeve on the bolt of the workpiece. A third industrial camera and a fourth industrial camera are arranged above the third conveyor line body. The third industrial camera and the fourth industrial camera are used to identify the position of the bolt on the workpiece and send the bolt position data to the second robot and the third robot for the installation of the protection sleeve.

[0014] The fourth transfer table and the fifth transfer table are respectively located on both sides of the third conveyor line body. The second robot is arranged on the fourth transfer table, and the third robot is arranged on the fifth transfer table.

[0015] The hub automatic production system further includes a spraying and drying system. The third conveyor line body transports the workpiece to the spraying and drying system, and the spraying and drying system sprays and dries the workpiece.

[0016] The hub automatic production system of the present invention can achieve automatic control of the transfer, grasping, loading, unloading, and boxing of hub workpieces, not only improving the installation efficiency, reducing the labor intensity of operators, but also ensuring reliable accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] This specification includes the following drawings, and the shown contents are respectively:

[0018] Figure 1 It is a schematic diagram of the overall structure of the hub automatic production system of the present invention;

[0019] Figure 2 It is a composition diagram of the hub automatic control device;

[0020] Figure 3 It is a schematic diagram of the hub drilling stepped hole station;

[0021] Figure 4 It is a schematic diagram of the hub drilling through hole station;

[0022] Figure 5 It is a schematic diagram of the hub outer bearing sleeve press-fitting;

[0023] Figure 6 It is a schematic diagram of the hub inner bearing sleeve press-fitting;

[0024] Figure 7 It is a schematic diagram of the hub bolt pre-assembly;

[0025] Figure 8 It is a composition diagram of the hub bolt press-fitting device;

[0026] Figure 9 It is a composition diagram of the hub sleeve bolt protective sleeve;

[0027] Figure 10 It is the composition of the hub palletizing and boxing Figure 1 ;

[0028] Figure 11 It is the composition of the hub palletizing and boxing Figure 2 ;

[0029] The labels in the figure are: 1. First conveyor line body; 2. First machine tool; 3. First transfer table; 4. Second machine tool; 5. Second conveyor line body; 6. Third machine tool; 7. Second transfer table; 8. Fourth machine tool; 9. Third transfer table; 10. Fifth machine tool; 11. Third conveyor line body; 12. Fourth transfer table; 13. Fifth transfer table; 14. Sixth transfer table; 15. Seventh transfer table; 16. Spraying and drying system; 17. Packaging box; 18. Eighth transfer table; 19. First robot; 20. Second robot; 21. Third robot; 22. Fourth robot; 23. Fifth robot; 24. Sixth robot; 25. Seventh robot; 26. Eighth robot; 27. Ninth robot; 28. Tenth robot; 29. PLC (Programmable Logic Controller); 30. HMI (Human Machine Interface); 31. Vision PC; 32. First industrial camera; 33. Second industrial camera; 34. Third industrial camera; 35. Fourth industrial camera. Detailed implementation manners

[0030] The following further elaborates on the specific implementation manners of the present invention by describing the embodiments with reference to the accompanying drawings, aiming to help those skilled in the art have a more complete, accurate, and in-depth understanding of the concept and technical solution of the present invention and facilitate its implementation.

[0031] It should be noted that in the following embodiments, the "first", "second", "third", "fourth", "fifth", "sixth", and "seventh" do not represent an absolute distinction relationship in terms of structure and / or function, nor do they represent the execution order, but are merely for the convenience of description.

[0032] As Figures 1 to 11 shown, the present invention provides a hub automatic production system, including a drill step hole device disposed at the drill step hole station and used for drilling step holes on the workpiece, a first conveyor line body 1 for conveying the workpiece to the drill step hole station, a drill through hole device disposed at the drill through hole station and used for drilling through holes on the workpiece, an outer bearing sleeve pressing device for pressing the outer bearing sleeve onto the workpiece, a second conveyor line body 5 for conveying the workpiece at the drill through hole station to the outer bearing sleeve pressing device, an inner bearing sleeve pressing device for pressing the inner bearing sleeve onto the workpiece, a bolt pressing device for pressing bolts onto the workpiece, a bolt protection sleeve assembling device for installing bolt protection sleeves on the bolts, and a third conveyor line body 11 for conveying the workpiece with pressed bolts to the bolt protection sleeve assembling device, and the workpiece is a wheel hub.

[0033] Specifically, as Figure 1 and Figure 3As shown in the figure, the stepped hole drilling device includes a first machine tool 2 for drilling stepped holes in the workpiece, and a ninth robot 27 for picking up the workpiece located on the first conveyor line 1 and transporting the workpiece to the first machine tool 2. The first machine tool 2 is a drilling machine for drilling the workpiece. A controllable turntable is provided inside the first machine tool 2 for placing and fixing the hub workpiece. The servo motor precisely controls the rotation angle of the turntable, and the servo motor is controlled by an electrical PLC29 controller.

[0034] As Figure 1 and Figure 4 shown in the figure, the through hole drilling device includes a second machine tool 4 for drilling through holes in the workpiece, and an eighth robot 26 for picking up the workpiece after the stepped hole drilling process and transporting the workpiece to the second machine tool 4. The second machine tool 4 is a drilling machine for drilling the workpiece. A controllable turntable is provided inside the second machine tool 4 for placing and fixing the hub workpiece. The servo motor precisely controls the rotation angle of the turntable, and the servo motor is controlled by an electrical PLC29 controller.

[0035] A first transfer table 3 for placing the workpiece is provided between the first machine tool 2 and the second machine tool 4. The first transfer table 3 is located between the first conveyor line 1 and the second conveyor line 5. The ninth robot 27 takes out the workpiece after the stepped hole processing from the first machine tool 2 and then places it on the first transfer table 3.

[0036] As Figure 1 and Figure 5 shown in the figure, the outer bearing sleeve press-fitting device includes a third machine tool 6, a seventh transfer table 15 for placing the outer bearing sleeve, a sixth robot 24 for picking up the outer bearing sleeve and placing it in the press-fitting hole of the workpiece, and a seventh robot 25 for picking up the workpiece located on the second conveyor line 5 and transporting the workpiece to the third machine tool 6. The third machine tool 6 is a press for realizing the press-fitting between the outer bearing sleeve and the workpiece.

[0037] As Figure 1 and Figure 6 shown in the figure, the inner bearing sleeve press-fitting device includes a fourth machine tool 8, a second transfer table 7 for placing the workpiece with the outer bearing sleeve press-fitted, a sixth transfer table 14 for placing the inner bearing sleeve, and a fifth robot 23 for picking up the workpiece with the outer bearing sleeve press-fitted and placing the workpiece on the fourth machine tool 8. The fifth robot 23 is configured to place the inner bearing sleeve in the press-fitting hole of the workpiece. The fourth machine tool 8 is a press for realizing the press-fitting between the inner bearing sleeve and the workpiece.

[0038] As Figure 1 and Figure 6 shown in the figure, the second transfer table 7 is located between the sixth transfer table 14 and the fourth machine tool 8.

[0039] As Figure 1 、 Figure 7 and Figure 8As shown in the figure, the bolt pressing device includes a fifth machine tool 10, a third transfer table 9 for placing the workpiece with the inner bearing sleeve pressed thereon, a second industrial camera 33 for collecting images of the workpiece placed on the third transfer table 9, a first robot 19 for picking up bolts and placing the bolts into the bolt holes of the workpiece, and a fourth robot 22 for picking up the workpiece located on the third transfer table 9 and placing the workpiece on the fifth machine tool 10. The fifth machine tool 10 is a press for realizing the pressing between the bolt and the workpiece.

[0040] As Figure 1 and Figure 9 shown in the figure, the bolt protection sleeve assembling device includes a fourth transfer table 12, a fifth transfer table 13, a second robot 20 for grasping the protection sleeve at the protection sleeve vibrating feeder disposed on the fourth transfer table 12 and sleeving the protection sleeve onto the bolt on the workpiece, and a third robot 21 for grasping the protection sleeve at the protection sleeve vibrating feeder disposed on the fifth transfer table 13 and sleeving the protection sleeve onto the bolt on the workpiece.

[0041] The fourth transfer table 12 and the fifth transfer table 13 are respectively located on both sides of the third conveyor line 11. The second robot 20 is disposed on the fourth transfer table 12, and the third robot 21 is disposed on the fifth transfer table 13. A third industrial camera 34 and a fourth industrial camera 35 are disposed above the third conveyor line 11. The third industrial camera 34 and the fourth industrial camera 35 are used to identify the position of the bolt on the workpiece and send the bolt position data to the second robot 20 and the third robot 21 for the installation of the protection sleeve.

[0042] As Figure 1 shown in the figure, the hub automatic production system of the present invention further includes a spraying and drying system 16. The third conveyor line 11 conveys the workpiece to the spraying and drying system 16, and the spraying and drying system 16 sprays paint and dries the workpiece after the protection sleeve assembling is completed.

[0043] As Figure 1 and Figure 10 shown in the figure, the hub automatic production system of the present invention further includes an eighth transfer table 18 and a tenth robot 28 disposed at the palletizing and boxing station.

[0044] As Figure 1 shown in the figure, the first conveyor line is in front of the ninth robot 27, the second conveyor line is between the seventh robot 25 and the eighth robot 26, and the third conveyor line is between the fourth robot 22 and the spraying and drying system 16 and the tenth robot. The conveyor line is used to realize the conveying function of the workpiece;

[0045] The transfer table is located between machine tools, between robots, or between machine tools and robots. The transfer table realizes the function of transferring and buffering workpieces between processes, as well as the function of storing and loading spare parts. The robot is located between the conveyor line body, the transfer table, and the machine tool, and realizes the functions of loading, unloading, and flipping workpieces between the machine tools or transfer tables at each station.

[0046] The system control device includes a PLC29. The PLC29 is connected to the robot controller through a Profi Net bus. The PLC29 is connected to the vision PC 31 of the industrial camera for vision detection through TCP / IP. The PLC29 controller conducts information interaction through the HMI 30. The vision PC 31, the PLC29, and each robot controller are connected through communication.

[0047] The first industrial camera 32 is located above the first transfer table 3. The second industrial camera 33 is located above the third transfer table 9. The third industrial camera 34 and the fourth industrial camera 35 are arranged above the third conveyor line body 11. The first industrial camera 32, the second industrial camera 33, the third industrial camera 34, and the fourth industrial camera 35 collect images of the hub workpieces. The first industrial camera 32, the second industrial camera 33, the third industrial camera 34, and the fourth industrial camera 35 are communicatively connected to the vision PC 31. The vision PC 31 is integrated with a hub workpiece pose recognition device for recognizing the pose of the hub workpiece.

[0048] The hub workpiece pose recognition device includes a preprocessing unit, an arc detection unit, a center determination unit, and a pose generation unit. The preprocessing unit is used to sequentially perform graying and binarization processing on the images collected by the first industrial camera 32, the second industrial camera 33, the third industrial camera 34, and the fourth industrial camera 35 to form a hub workpiece image src1. The arc detection unit is used to detect the outermost contour of the hub workpiece in the image src1 and the arc contours of each threaded hole or the outer contours of each bolt. The center determination unit is used to determine the centers of each arc and each outer contour. The pose generation unit is used to obtain the line segment Lh between the center of the minimum enclosing circle of the outermost contour of the hub workpiece and the center of the arc of each threaded hole or the center of the outer contour of the bolt, and the line segment Lx parallel to the x-axis and passing through the center of the minimum enclosing circle, calculate the included angle between the line segment Lh and the line segment Lx, and take the minimum included angle as the pose of the hub workpiece.

[0049] The working process of the hub automatic production system is as follows:

[0050] 1. The hub workpiece is loaded onto the first conveyor line body 1. The ninth robot 27 detects the workpiece in-place signal, grabs the workpiece, and places it above the first transfer table 3. The workpiece is located below the first industrial camera 32.

[0051] The ninth robot 27 sends a signal indicating that the workpiece is placed in position to the PLC 29. The PLC 29 sends a signal to the vision PC 31. The vision PC 31 acquires the workpiece image through the first industrial camera 32, locates the pose of the workpiece, and feeds back the information to the PLC 29.

[0052] The PLC 29 sends the workpiece position data to the ninth robot 27. The ninth robot 27 grasps the workpiece according to the workpiece position data, turns the angle of the workpiece, and then places the workpiece into the first machine tool 2.

[0053] The PLC 29 sends a signal to the first machine tool 2 to control the drill bit to descend and machine a stepped hole on the workpiece. Then, it controls the rotary table on the first machine tool 2 to drive the rotating workpiece to complete the machining of the remaining stepped holes on the workpiece one by one. After all the stepped holes are machined, the PLC 29 sends a signal to the ninth robot 27. The ninth robot 27 takes out the workpiece and then places the workpiece onto the first transfer table 3.

[0054] 2. The eighth robot 26 detects the workpiece in-position signal on the first transfer table 3 and sends a signal indicating that the workpiece is placed in position to the PLC 29. The PLC 29 sends a signal to the vision PC 31. The vision PC 31 acquires the workpiece image through the first industrial camera 32, locates the pose of the workpiece, and feeds back the information to the PLC 29.

[0055] The PLC 29 sends the workpiece position data to the eighth robot 26. The eighth robot 26 grasps the workpiece according to the workpiece position data, flips the workpiece, turns the angle, and then places the workpiece into the second machine tool 4.

[0056] The eighth robot 26 sends a signal indicating that the workpiece is in position to the PLC 29. The PLC 29 controls the fixture on the second machine tool 4 to clamp and position the workpiece. The PLC 29 controls the second machine tool 4 to machine the workpiece, and then rotates the workpiece to complete the machining of the remaining bolt through-holes on the workpiece one by one.

[0057] The PLC 29 sends a signal to the eighth robot 26. The eighth robot 26 takes out the workpiece and places the workpiece onto the second conveyor line 5.

[0058] 3. The seventh robot 25 detects the workpiece in-position signal on the second conveyor line 5, grasps the workpiece onto the third machine tool 6, and sends a signal to the sixth robot 24.

[0059] The sixth robot 24 grasps the outer bearing sleeve on the seventh transfer table 15 and places it on the workpiece press-fitting hole, and sends a signal to the PLC 29. The PLC 29 sends a signal to the third machine tool 6. The third machine tool 6 runs the press-fitting to press-fit the outer bearing sleeve into the press-fitting hole of the workpiece. After the press-fitting is completed, the PLC 29 sends a signal to the sixth robot 24. The sixth robot 24 takes out the workpiece after press-fitting, flips the workpiece, and places it onto the second transfer table 7.

[0060] 4. The fifth robot 23 detects the workpiece in-place signal on the second transfer table 7, grabs the workpiece, places the workpiece on the fourth machine tool 8, grabs the inner bearing sleeve on the sixth transfer table 14 and places it on the workpiece press-fitting hole, and sends a signal to the PLC 29. The PLC 29 sends a signal to the fourth machine tool 8, and the fourth machine tool 8 runs for press-fitting to press-fit the inner bearing sleeve into the press-fitting hole of the workpiece. After the press-fitting is completed, the PLC 29 sends a signal to the fifth robot 23. The fifth robot 23 takes out the workpiece after the press-fitting is completed, places the workpiece on the third transfer table 9. The workpiece is located below the second industrial camera 33, and a signal is sent to the PLC 29.

[0061] 5. The PLC 29 sends a signal to the vision PC 31, collects the workpiece image through the second industrial camera 33, locates the workpiece pose. The vision PC 31 feeds back the workpiece pose information to the PLC 29. The PLC 29 sends the bolt hole position data of the workpiece to the first robot 19. The first robot 19 grabs bolts from the bolt vibrating feeder and places them into the bolt holes on the workpiece. After all the bolt holes on the workpiece are filled with bolts, a signal is sent to the PLC 29.

[0062] 6. The PLC 29 sends a signal to the fourth robot 22. According to the pose data information of the previous feedback station, the grasping angle is adjusted. The fourth robot 22 grabs the hub workpiece with bolts placed on the third transfer table 9, and then places the workpiece on the fixture of the fifth machine tool 10 to align the bolt holes with the punch of the fifth machine tool 10. The fifth machine tool 10 presses the bolts. After the press-fitting is completed, the PLC 29 sends a signal to the fourth robot 22. The fourth robot 22 takes out the workpiece after the press-fitting is completed, flips the workpiece, and places the hub workpiece on the third conveyor line 11.

[0063] 7. The hub workpiece is conveyed on the third conveyor line 11 and reaches the buffer area in front of the second robot 20 and the third robot 21. It is stopped by the stopper and the workpiece stops conveying. The PLC 29 sends a signal to the vision PC 31, collects the workpiece image through the third industrial camera 34 and the fourth industrial camera 35, locates the workpiece pose. The vision PC 31 feeds back the workpiece pose information to the PLC 29. The PLC 29 sends the bolt position data information on the workpiece to the second robot 20 and the third robot 21. The second robot 20 grabs the protective sleeve from the protective sleeve vibrating feeder on the fourth transfer table 12 and puts it on the bolt of the hub workpiece; the third robot 21 grabs the protective sleeve from the protective sleeve vibrating feeder on the fifth transfer table 13 and puts it on the bolt of the hub workpiece; after the installation is completed, a signal is sent to the PLC 29. The PLC 29 sends a signal to control the stopper to lower, release the installed workpiece, and continue to convey it to the next station;

[0064] 8. Manually hang the workpiece on the fixture of the suspension chain. The workpiece enters the spraying and drying system 16, and the spraying and drying system 16 sprays paint on and dries the workpiece. After drying, the workpiece is manually removed from the suspension chain, a white outer protective cover is put on, and then the workpiece is placed back on the third conveyor line 11;

[0065] 9. The tenth robot 28 detects the workpiece in-place signal on the third conveyor line 11, grabs the hub workpiece, and stacks and loads it into the packing box 17. After stacking one layer, the tenth robot 28 grabs the wooden partition placed on the eighth turntable 18. The tenth robot 28 places the grabbed partition between two layers of workpieces as an interlayer protection. After the packing box 17 is full, it sends a signal to the PLC 29 to notify the forklift to take the packing box 17 offline and transfer it to the warehouse. Replace it with an empty box to continue the packing work.

[0066] 10. The eighth turntable 18 is controlled by a servo motor for lifting, and the turntable is driven by a motor-controlled cam divider.

[0067] For the hub automatic production system with the above structure, the transportation, grasping, loading, unloading, and packing of the hub workpiece are all automatically controlled, which not only improves the installation efficiency, reduces the labor intensity of the operators, but also can reliably guarantee the accuracy. Therefore, in the present invention, through the setting of the control system and control method, each component realizes reliable cooperation, so as to complete the automation of hub production. Therefore, the improvement point of the present invention lies not in the improvement of individual components, but in the integrated design of the whole system. This is the key to reflecting the technical difficulties and creativity of the present invention. The hub automatic production system and control method described in the present invention are reliably controlled, and realize the hub automatic production technology based on machine vision, robot technology and mechatronic control, realizing high-efficiency and high-quality hub automatic production, so as to replace the traditional manual or manual-assisted installation, and solve the problems of low manual efficiency and difficult control of installation quality parameters.

[0068] The present invention has been described exemplarily in combination with the accompanying drawings. Obviously, the specific implementation of the present invention is not limited by the above methods. As long as various non-substantive improvements are made by adopting the method concept and technical solution of the present invention; or without improvement, the above concept and technical solution of the present invention are directly applied to other occasions, they are all within the protection scope of the present invention.

Claims

1. An automated production system for a wheel hub, characterized in that: It includes a stepped hole drilling device arranged at the stepped hole drilling station and used for drilling stepped holes on the workpiece, a first conveyor line body for conveying the workpiece to the stepped hole drilling station, a through hole drilling device arranged at the through hole drilling station and used for drilling through holes on the workpiece, an outer bearing sleeve pressing device for pressing the outer bearing sleeve onto the workpiece, a second conveyor line body for conveying the workpiece at the through hole drilling station to the outer bearing sleeve pressing device, an inner bearing sleeve pressing device for pressing the inner bearing sleeve onto the workpiece, a bolt pressing device for pressing the bolt onto the workpiece, a bolt protection sleeve assembling device for installing the bolt protection sleeve on the bolt, and a third conveyor line body for conveying the workpiece with the bolt pressed thereon to the bolt protection sleeve assembling device.

2. The hub automatic production system according to claim 1, wherein: The stepped hole drilling device includes a first machine tool for drilling stepped holes on the workpiece and a ninth robot for picking up the workpiece located on the first conveyor line body and transporting the workpiece to the first machine tool.

3. The hub automated production system according to claim 2, wherein: The through hole drilling device includes a second machine tool for drilling through holes on the workpiece and an eighth robot for picking up the workpiece after the stepped hole drilling process is completed and transporting the workpiece to the second machine tool. A first transfer table for placing the workpiece is arranged between the first machine tool and the second machine tool, and the first transfer table is located between the first conveyor line body and the second conveyor line body.

4. The hub automated production system according to any one of claims 1 to 3, characterized in that: The outer bearing sleeve pressing device includes a third machine tool, a seventh transfer table for placing the outer bearing sleeve, a sixth robot for picking up the outer bearing sleeve and placing the outer bearing sleeve into the pressing hole on the workpiece, and a seventh robot for picking up the workpiece located on the second conveyor line body and transporting the workpiece to the third machine tool.

5. The hub automatic production system according to any one of claims 1 to 3, characterized in that: The inner bearing sleeve pressing device includes a fourth machine tool, a second transfer table for placing the workpiece with the outer bearing sleeve pressed thereon, a sixth transfer table for placing the inner bearing sleeve, and a fifth robot for picking up the workpiece with the outer bearing sleeve pressed thereon and placing the workpiece on the fourth machine tool. The fifth robot is configured to place the inner bearing sleeve into the pressing hole on the workpiece.

6. The hub automated production system according to claim 5, wherein: The second transfer table is located between the sixth transfer table and the fourth machine tool.

7. The hub automatic production system according to any one of claims 1 to 6, characterized in that: The bolt pressing device includes a fifth machine tool, a third transfer table for placing the workpiece with the inner bearing sleeve pressed thereon, a second industrial camera for collecting images of the workpiece placed on the third transfer table, a first robot for picking up the bolt and placing the bolt into the bolt hole on the workpiece, and a fourth robot for picking up the workpiece located on the third transfer table and placing the workpiece on the fifth machine tool.

8. The hub automatic production system according to any one of claims 1 to 6, characterized in that: The bolt protection sleeve assembling device includes a fourth transfer table, a fifth transfer table, a second robot for grasping the protection sleeve at the protection sleeve vibrating hopper arranged on the fourth transfer table and sleeving the protection sleeve onto the bolt on the workpiece, and a third robot for grasping the protection sleeve at the protection sleeve vibrating hopper arranged on the fifth transfer table and sleeving the protection sleeve onto the bolt on the workpiece. A third industrial camera and a fourth industrial camera are arranged above the third conveyor line body. The third industrial camera and the fourth industrial camera are used to identify the position of the bolt on the workpiece and send the bolt position data to the second robot and the third robot for installing the protection sleeve.

9. The hub automatic production system according to claim 8, wherein: The fourth transfer station and the fifth transfer station are respectively located on both sides of the third conveyor line body. The second robot is arranged on the fourth transfer station, and the third robot is arranged on the fifth transfer station.

10. The hub automated production system according to any one of claims 1 to 9, characterized in that: It further includes a spraying and drying system. The third conveyor line body conveys the workpiece to the spraying and drying system, and the spraying and drying system sprays paint and dries the workpiece.

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