Automatic production line for axle spraying

Abstract

The invention discloses an efficient automatic production line for axle spraying. The efficient automatic production line comprises a spraying working chamber, an AGV (Automatic Guided Vehicle) conveying line A, a disc machine, a return line, a feeding conveying line and an AGV conveying line B, integrated operation of material conveying, spraying treatment, drying curing and returning is achieved through modular design, the production efficiency and the spraying precision are remarkably improved, manual intervention is reduced, it is ensured that spraying is uniform and free of dead corners, and various production requirements are met.

Description

Technical Field

[0001] The present invention belongs to the technical field of automated production, and specifically relates to the efficient automated processing of axle spraying. Background Art

[0002] Axle spraying is an important technological process in vehicle manufacturing. By spraying the axle, its corrosion resistance and service life can be significantly improved. However, the existing axle spraying technologies still have deficiencies in terms of automation level, spraying uniformity, operation efficiency, and the adaptability to different types of axles, which affect production efficiency and product quality.

[0003] After retrieval, an axle automatic painting device and method with the publication number CN109604096B was disclosed on April 6, 2021. This patent provides an axle automatic painting device, including a spray gun, a robotic arm, a detection device, a conveying device, an axle rotation device, and a control device. Through the axial movement of the robotic arm along the axle and the rotation of the axle driven by the axle rotation device, the automated spraying of the axle surface is achieved. This technical solution solves the problem of traditional manual spraying relying on workers' experience and skills, and improves spraying quality and production efficiency. However, this device is mainly designed for a single type of axle, lacking the ability to quickly adapt to different specifications of axles, and no measures for treating the toxic gases generated during the spraying process are mentioned, which may pose a potential threat to the health of operators. In addition, the uniformity of the spraying thickness in this solution depends on the coordinated control of the robotic arm and the axle rotation. If the control accuracy is insufficient, problems such as over-thick or under-thin spraying in local areas may occur.

[0004] After retrieval, a painting method for the anti-impact coating on the surface of the CRH5G EMU axle with the publication number CN107876351B was disclosed on May 25, 2021. This patent solves the problem that the axles of high-speed trains are severely impacted by sand, ice, and snow in alpine and sandy areas by developing a new axle painting process and using two-component polyurea coatings and thermal spraying technologies. This method ensures the anti-impact performance and durability of the coating through strict coating thickness design (3 - 5 mm) and performance indicators (such as the adhesion pull-out strength not less than 8 Ma). However, this technical solution mainly focuses on the axle protection painting in specific scenarios, fails to achieve fully automated operation, and still requires manual participation in some processes (such as axle surface cleaning and non-painting area protection). In addition, this method has high requirements for painting equipment, which may increase equipment costs and maintenance difficulties, and does not involve the compatibility design for multiple types of axles, restricting its application scope.

[0005] The above problems indicate that there are still certain deficiencies in the existing axle spraying technology in terms of automation level, adaptability to different types of axles, spraying uniformity, and optimization of the operating environment. Therefore, the present invention provides an automated operation system for axle spraying, aiming to achieve full-process automation of axle spraying, improve spraying uniformity and operation efficiency, enhance the adaptability to various types of axles, and optimize the operating environment to ensure the health of operators, so as to meet the requirements of the modern vehicle manufacturing field for an efficient and intelligent spraying system. Summary of the Invention

[0006] Aiming at the problems of low automation level, unstable spraying quality, and limited production efficiency existing in the existing axle spraying production line, the present invention proposes an efficient automated production line for axle spraying. Through the collaborative operation of multiple modules, the integrated operation from material conveying, spraying treatment to drying and curing is realized, significantly improving the production efficiency and spraying accuracy.

[0007] The present invention provides an automated production line for axle spraying, which includes a spraying workroom, AGV material conveying line A, a disc machine, a return line, a feeding conveying line, and AGV material conveying line B. The spraying workroom is the core area, responsible for cleaning, spraying, and drying the workpieces; AGV material conveying line A and AGV material conveying line B are respectively used for feeding and auxiliary transportation to ensure the precise docking of workpieces between various processes; the disc machine is used to store and manage the paint trays, providing a stable paint supply for the spraying process; the return line sends the sprayed workpieces back to the designated position or into the next process; the feeding conveying line conveys the workpieces to be sprayed to the spraying workroom. Further, the above modules achieve the integrated operation of material conveying, spraying treatment, drying and curing, and returning through modular design, reducing manual intervention and improving production efficiency.

[0008] Preferably, the spraying workroom consists of an axle cleaning room, a paint spraying room, lifting receiving rack 1, a drying room, and lifting receiving rack 2. The axle cleaning room pre-cleans the surface of the axle, the paint spraying room is equipped with spraying equipment and a control system to complete the spraying operation, lifting receiving rack 1 and lifting receiving rack 2 receive and place workpieces at different heights through lifting actions, and the drying room dries the sprayed workpieces.

[0009] Preferably, lifting receiving rack 1 and lifting receiving rack 2 are composed of a roller conveyor line module, a hydraulic lifting control system, a lift traveling part, and a scissors lift mechanism. The roller conveyor line module is used to convey workpieces, the hydraulic lifting control system controls the lifting actions of the lifting receiving rack, the lift traveling part is responsible for the horizontal movement of the lifting receiving rack, and the scissors lift mechanism realizes smooth lifting.

[0010] Preferably, the disc machine consists of an electromagnet chuck, a disc machine cross beam, a truss manipulator, a disc machine longitudinal beam, a tray storage board, and a truss support. The electromagnet chuck is used to adsorb and fix the coating tray. The disc machine cross beam and the disc machine longitudinal beam form a frame structure to provide overall support. The truss manipulator is responsible for moving and adjusting the position of the coating tray. The tray storage board is used to store unused coating trays. The truss support provides additional stability for the entire device.

[0011] Preferably, the truss manipulator is driven by a servo motor to move along the disc machine cross beam and the disc machine longitudinal beam to achieve precise positioning of the coating tray.

[0012] Preferably, the automatic production line further includes an axle spraying and flipping mechanism, which consists of a roller driving motor, a lifting hydraulic cylinder, a main body support frame, an active flipping roller, an independent conveying unit, a driven flipping roller, a flipping mechanism bottom plate, a connecting panel, and a translation driving mechanism. The roller driving motor drives the rollers to rotate and drives the axle to rotate. The lifting hydraulic cylinder is used to lift the axle. The main body support frame provides overall support. The active flipping roller and the driven flipping roller are used to flip the axle. The independent conveying unit facilitates maintenance and replacement. The flipping mechanism bottom plate provides a stable foundation. The connecting panel and the translation driving mechanism are used to connect and drive the translational movement of the flipping mechanism.

[0013] Preferably, the active flipping roller and the driven flipping roller achieve synchronous flipping through gear meshing to ensure that there are no dead corners on the axle during the spraying process.

[0014] Preferably, the AGV material conveying line consists of an AGV track, a roller conveying unit, a material receiving cart, a photoelectric sensor, and a limit block. The AGV track is the track for the automatic guided vehicle to run. The roller conveying unit is used to convey workpieces. The material receiving cart is used to receive and transport workpieces. The photoelectric sensor detects the position and state of the workpieces. The limit block restricts the position of the workpieces to prevent sliding.

[0015] Preferably, the roller conveying unit of the second-layer drying line consists of a conveying unit support leg, a photoelectric sensor, rollers, a chain, a driven sprocket, a power shaft support block, a power conversion support frame, a power shaft, a main power input sprocket, and a clutch. The conveying unit support leg supports the leg structure of the conveying unit. The photoelectric sensor detects the position and state of the workpieces. The rollers are used to convey workpieces. The chain and the driven sprocket form part of the transmission system to drive the rollers to rotate. The power shaft support block and the power conversion support frame support the power shaft and the conversion device. The power shaft and the main power input sprocket are the main components for power transmission. The clutch controls the engagement and separation of power.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: Through modular design and automatic control, the present invention realizes the efficient operation of the axle spraying production line. First, the high degree of automation significantly reduces manual intervention and labor intensity; second, the spraying quality is ensured by the flipping mechanism and precise positioning device, ensuring uniform spraying without dead angles; third, the production efficiency is significantly improved. By adopting the AGV material conveying line and the lifting material receiving rack, rapid material conveying and precise docking are achieved; finally, it has strong flexibility, and each module can operate independently or be combined for use to meet various production requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is the overall schematic diagram of the present invention; Figure 2 is the schematic diagram of the spraying workshop of the present invention; Figure 3 is the schematic diagram of the disc machine of the present invention; Figure 4 is the schematic diagram of the lifting material receiving rack of the present invention; Figure 5 is the schematic diagram of the axle spraying flipping mechanism of the present invention; Figure 6 is the schematic diagram of the AGV material conveying line of the present invention; Figure 7 is the schematic diagram of the roller conveying unit of the second-layer drying line of the present invention.

[0018] In the figure: 1, spraying workshop; 2, AGV material conveying line A; 3, disc machine; 4, return line; 5, AGV material conveying line B; 6, feeding conveying line; 7, axle cleaning room; 8, paint spraying room; 9, lifting material receiving rack 1; 10, drying room; 11, lifting material receiving rack 2; 12, electromagnetic suction cup; 13, disc machine cross beam; 14, truss manipulator; 15, disc machine longitudinal beam; 16, pallet storage board; 17, truss support; 18, roller conveying line module; 19, hydraulic lifting control system; 20, elevator running part; 21, scissors lift mechanism; 22, roller drive motor; 23, lifting hydraulic cylinder; 24, main body support frame; 25, active flipping roller; 26, independent conveying unit; 27, driven flipping roller; 28, flipping mechanism bottom plate; 29, connecting panel; 30, translation drive mechanism; 31, AGV track; 32, roller conveying unit; 33, material receiving trolley; 34, photoelectric sensor; 35, limit block; 36, conveying unit support leg; 37, photoelectric sensor; 38, roller; 39, chain; 40, driven sprocket; 41, power shaft support block; 42, power conversion support frame; 43, power shaft; 44, main power input sprocket; 45, clutch. DETAILED DESCRIPTION OF THE INVENTION

[0019] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts belong to the scope of protection of the present invention.

[0020] The present invention provides an automated production line for axle spraying, which realizes full-process automated operations from material transportation, spraying treatment to drying and curing through the collaborative operation of multiple modular components. The following describes the specific embodiments of the present invention in detail with reference to the accompanying drawings.

[0021] As Figure 1 shown, the automated production line includes a spraying workshop 1, an AGV material transportation line A 2, a disc machine 3, a return line 4, a feeding conveyor line 6, and an AGV material transportation line B 5. The spraying workshop 1 is the core area, responsible for cleaning, spraying, and drying the axle; the AGV material transportation line A 2 and the AGV material transportation line B 5 are respectively responsible for feeding and auxiliary transportation tasks to ensure accurate docking of workpieces between various processes; the disc machine 3 is used to store and manage paint trays to provide a stable paint supply for the spraying process; the return line 4 sends the workpieces that have completed spraying back to the designated position or into the next process; the feeding conveyor line 6 transports the workpieces to be sprayed to the spraying workshop 1.

[0022] The specific structure of the spraying workshop 1 is as Figure 2 shown. It consists of an axle cleaning room 7, a paint spraying room 8, a lifting material receiving rack 1 and a lifting material receiving rack 2 (labeled 9 and 11 respectively), and a drying room 10. The axle cleaning room 7 is equipped with a high-pressure spraying device and a cleaning liquid circulation system, which can thoroughly pre-clean the surface of the axle to ensure the cleanliness before spraying. The paint spraying room 8 is provided with spraying equipment and a control system. The spraying equipment adopts a multi-axis robotic arm design, which can realize spraying operations at different angles. At the same time, the control system automatically adjusts the spraying pressure and flow based on preset parameters to ensure the consistency of spraying quality. The lifting material receiving rack 1 and the lifting material receiving rack 2 are driven by hydraulic pressure to realize lifting actions, receiving and placing workpieces at different heights for easy spraying operations. The drying room 10 adopts hot air circulation heating technology, and is equipped with a temperature sensor and a humidity sensor to monitor and adjust the drying environment in real time to ensure complete curing of the coating.

[0023] The specific structure of the disc machine 3 is as Figure 3As shown in the figure, it consists of an electromagnet chuck 12, a disc machine cross beam 13, a truss manipulator 14, a disc machine longitudinal beam 15, a tray storage board 16 and a truss support 17. The electromagnet chuck 12 is installed at the end of the truss manipulator 14 and fixes the paint tray through the electromagnetic adsorption principle to ensure stable paint supply during the spraying process. The disc machine cross beam 13 and the disc machine longitudinal beam 15 together form a frame structure to provide stable support for the entire device. The truss manipulator 14 moves along the cross beam and the longitudinal beam, and realizes the precise positioning and efficient management of the paint tray through the drive of a servo motor. The tray storage board 16 is located at the bottom of the disc machine and is used to store unused paint trays for replacement at any time. The truss support 17 further enhances the overall stability and prevents the paint tray from shifting due to external vibration.

[0024] The specific structure of the lifting and receiving rack is as Figure 4 shown in the figure, and it consists of a roller conveyor line module 18, a hydraulic lifting control system 19, a lift running part 20 and a scissor lift mechanism 21. The roller conveyor line module 18 realizes the stable transportation of workpieces through the drive of a motor. Each roller is made of high-strength materials to bear a large weight. The hydraulic lifting control system 19 controls the lifting action of the lifting and receiving rack through a hydraulic cylinder. The hydraulic cylinder is equipped with a pressure sensor to dynamically adjust the hydraulic pressure according to the actual load to ensure a stable and reliable lifting process. The lift running part 20 is installed at the bottom of the lifting and receiving rack and realizes horizontal movement through a guide rail and a pulley group, which is convenient for the transfer of workpieces between different workstations. The scissor lift mechanism 21 adopts a cross-link design and realizes the lifting function through the drive of a hydraulic cylinder, with high load-bearing capacity and stability.

[0025] The specific structure of the axle spraying and flipping mechanism is as Figure 5 shown in the figure, and it consists of a roller drive motor 22, a lifting hydraulic cylinder 23, a main body support frame 24, a driving flipping roller 25, an independent conveying unit 26, a driven flipping roller 27, a flipping mechanism bottom plate 28, a connecting panel 29 and a translation drive mechanism 30. The roller drive motor 22 is installed on the main body support frame 24 and drives the driving flipping roller 25 to rotate through belt transmission, thereby driving the axle to rotate. The lifting hydraulic cylinder 23 is installed below the flipping mechanism bottom plate 28 and realizes the lifting action of the axle through hydraulic drive to adapt to the spraying requirements at different heights. The main body support frame 24 is welded by high-strength steel to provide a solid support for the entire flipping mechanism. The driving flipping roller 25 and the driven flipping roller 27 are respectively installed at both ends of the main body support frame 24 and realize synchronous flipping through gear meshing to ensure that there are no dead corners on the axle during the spraying process. The independent conveying unit 26 is integrated into the flipping mechanism for easy maintenance and replacement. The connecting panel 29 and the translation drive mechanism 30 are connected by bolts. The translation drive mechanism 30 adopts a lead screw drive design and realizes the horizontal movement of the flipping mechanism through the drive of a servo motor.

[0026] The specific structure of the AGV material conveying line is as follows Figure 6 As shown in the figure, it consists of an AGV track 31, a roller conveying unit 32, a material receiving trolley 33, an optoelectronic sensor 34, and a limit block 35. The AGV track 31 is laid on the workshop floor and uses magnetic navigation technology to guide the automatic guided vehicle to run, ensuring that the material conveying path is accurately controllable. The roller conveying unit 32 is installed on the material receiving trolley 33 and realizes the smooth conveying of workpieces through motor drive. The material receiving trolley 33 adopts a modular design and can flexibly adjust the size and load capacity according to actual needs. The optoelectronic sensors 34 are installed on both sides of the material receiving trolley 33 to detect the position and state of the workpieces and transmit signals to the control system to achieve intelligent management of material conveying. The limit block 35 is set at the end of the material receiving trolley 33 to limit the position of the workpieces and prevent the workpieces from sliding due to inertia.

[0027] The specific structure of the roller conveying unit of the second-layer drying line is as follows Figure 7 As shown in the figure, it consists of a conveying unit support leg 36, an optoelectronic sensor 37, rollers 38, a chain 39, a driven sprocket 40, a power shaft support block 41, a power conversion support frame 42, a power shaft 43, a main power input sprocket 44, and a clutch 45. The conveying unit support leg 36 adopts an adjustable design and can adjust the height of the conveying unit according to actual needs to meet the operation requirements of different workstations. The optoelectronic sensors 37 are installed on both sides of the conveying unit to detect the position and state of the workpieces and transmit signals to the control system to achieve automated management of the conveying process. The rollers 38 are installed on the conveying unit frame through bearings, and each roller is made of high-strength materials to bear a large weight. The chain 39 and the driven sprocket 40 form part of the transmission system and drive the rollers to rotate through the power shaft 43, thereby realizing the smooth conveying of workpieces. The power shaft support block 41 and the power conversion support frame 42 are respectively installed at both ends of the power shaft 43 to provide stable support for the power shaft. The main power input sprocket 44 is connected to the power shaft 43 through a chain to provide the power source for the conveying unit. The clutch 45 is installed between the main power input sprocket 44 and the power shaft 43, and the engagement and separation of power are realized through electromagnetic control, facilitating the adjustment of the conveying speed and direction according to actual needs.

[0028] The above-mentioned modules achieve collaborative operation through the PLC control system. The control system automatically schedules the operation of each module based on a preset program to ensure the efficient and orderly production process. For example, when the workpiece to be sprayed enters the spraying studio 1 through the feeding conveying line 6, the axle cleaning chamber 7 automatically starts the cleaning program. After the cleaning is completed, the workpiece is conveyed to the paint spraying chamber 8 for spraying operation. During the spraying process, the disc machine 3 automatically replaces the paint tray according to the spraying requirements, and the lifting material receiving racks 1 and 2 cooperate to complete the loading and unloading operations of the workpieces. After the spraying is completed, the workpiece is sent to the drying room 10 for drying treatment, and then returns to the designated position or enters the next process through the return line 4.

[0029] The working principle of this system is as follows: S1 During the start-up phase of the production line, the axle enters the spraying studio 1 through the feed conveyor line 6. The feed conveyor line 6 adopts a chain transmission mode, the chain 39 is meshed with the driven sprocket 40, the driven sprocket 40 is installed on the power shaft 43, and the power shaft 43 is driven by the motor through the main force input sprocket 44. The photoelectric sensor 34 is arranged at a key position of the feed conveyor line 6 to detect the position and state of the axle in real time to ensure the precise control of the conveying process. When the axle arrives at the spraying studio 1, the lifting rack 1 lifts the axle to an appropriate height through the hydraulic lifting control system 19 for subsequent spraying operations. The hydraulic lifting control system 19 is composed of a hydraulic pump station, an oil cylinder and a control valve. The lifting action is realized by adjusting the hydraulic pressure. At the same time, the scissor lift mechanism 21 adopts a cross-link structure, and the lifting function is realized by hydraulic cylinder drive, which has high load-bearing capacity and stability.

[0030] After the S2 axle is cleaned in the spraying studio 1, it is transported to the paint spraying room 8 for spraying. The spraying equipment in the paint spraying room 8 coordinates work through an intelligent control system to ensure the efficiency and consistency of the spraying process. The nozzle array of the spraying equipment is driven by a stepper motor, which can automatically adjust the spraying angle according to the shape and size of the axle, thereby achieving multi-angle coverage. During the spraying process, the disc machine 3 is responsible for the management and supply of paint. Its main structure includes an electromagnetic suction cup 12, a disc machine crossbeam 13, a truss manipulator 14, a tray storage plate 16 and a truss support 17. The electromagnetic suction cup 12 is installed at the end of the truss manipulator 14 to absorb and fix the paint tray to ensure the stability of the paint tray during transportation. The truss manipulator 14 is driven by a servo motor and moves along the disc machine crossbeam 13 and the disc machine longitudinal beam 15 to realize automatic placement and management of the paint tray. The tray storage plate 16 is used to store unused paint trays for quick replacement. The truss support 17 connects the cross beam and the longitudinal beam, thereby enhancing the overall rigidity of the disc machine and ensuring the stability of the equipment under high load.

[0031] After the spraying in S3 is completed, the axle is conveyed to the lifting and receiving rack 2 for the next operation. The lifting and receiving rack 2 lowers the axle to an appropriate height through the hydraulic lifting control system 19 and conveys it to the axle spraying and flipping mechanism. The main structure of the axle spraying and flipping mechanism includes a roller drive motor 22, a lifting hydraulic cylinder 23, a main body support frame 24, a driving flipping roller 25, a driven flipping roller 27, an independent conveying unit 26, and a translation drive mechanism 30. The roller drive motor 22 is connected to the driving flipping roller 25 through a reducer to drive the flipping roller to rotate and drive the axle to achieve a 360° flip. The lifting hydraulic cylinder 23 is installed at the bottom of the main body support frame 24 and is used to lift the axle to an appropriate height for spraying operations. The main body support frame 24 is made of high-strength steel to provide overall support and ensure the stability and reliability of the equipment. The driving flipping roller 25 and the driven flipping roller 27 work together to achieve smooth flipping of the axle through friction. The independent conveying unit 26 is arranged on both sides of the main body support frame 24 and is used to convey the axle to ensure the continuity of the workpiece during the spraying process. The translation drive mechanism 30 consists of a servo motor and a lead screw nut pair to achieve the horizontal movement of the flipping mechanism and adapt to the spraying requirements of different workpieces.

[0032] After the flipping in S4 is completed, the axle is conveyed to the drying chamber 10 for coating curing. The hot air circulation system in the drying chamber 10 works in cooperation with the heater and the fan to cure the surface coating of the sprayed axle to the required performance indicators. During the drying process, the temperature and time parameters are monitored in real time by the intelligent control system to ensure that the coating quality meets the standards. After drying is completed, the axle is conveyed to the discharge port through the roller conveying unit of the second-layer drying line. The main structure of the roller conveying unit of the second-layer drying line includes conveying unit support legs 36, photoelectric sensors 37, rollers 38, chains 39, driven sprockets 40, power shaft support blocks 41, power conversion support frames 42, power shafts 43, main power input sprockets 44, and clutches 45. The conveying unit support legs 36 are made of square steel pipes to support the entire conveying unit and ensure its stability. The photoelectric sensors 37 are arranged at key positions of the conveying unit to detect the position and state of the workpiece in real time and ensure precise control during the conveying process. The rollers 38 are installed on the frame of the conveying unit through bearings and achieve synchronous rotation through chain drive. The chains 39 are engaged with the driven sprockets 40, and the driven sprockets 40 are installed on the power shafts 43. The power shafts 43 are fixed through the power shaft support blocks 41. The power conversion support frames 42 connect the power shafts 43 and the main power input sprockets 44 to transmit power to the conveying unit. The main power input sprockets 44 are driven by a motor, and the power input and disconnection are achieved through the clutches 45 to ensure the safe operation of the equipment.

[0033] S5 Finally, the axle is transported to the finished product area through the AGV material handling line B5. The AGV material handling line B5 includes an AGV track 31, a roller conveying unit 32, a receiving trolley 33, a photoelectric sensor 34, and a limit block 35. The AGV track 31 is laid along a predetermined path to provide a stable running track for the AGV. The roller conveying unit 32 is installed on the top of the AGV and realizes the smooth conveying of materials through motor drive. The receiving trolley 33 is used in cooperation with the roller conveying unit 32 to receive and place workpieces. The photoelectric sensor 34 is arranged at key positions of the AGV to detect the position and state of the workpiece in real time, ensuring precise control during the transportation process. The limit block 35 is set at the end of the AGV track 31 to limit the running range of the AGV and prevent overstepping or collision.

[0034] Through the above implementation manner, the present invention realizes the efficient and automated operation of the axle spraying production line, significantly reduces manual intervention, improves production efficiency and spraying quality, and at the same time has strong flexibility, can adapt to various production requirements, and is suitable for large-scale industrial production.

[0035] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An automated production line for axle spraying, characterized in that: It includes a spraying workshop (1), an AGV material transportation line A (2), a disc machine (3), a return line (4), a feeding conveyor line (6) and an AGV material transportation line B (5). The spraying workshop (1) is the core area, responsible for cleaning, spraying and drying the workpieces. The AGV material transportation line A (2) and the AGV material transportation line B (5) are respectively used for feeding and auxiliary transportation to ensure the precise docking of the workpieces between each process. The disc machine (3) is used to store and manage the paint trays, providing a stable paint supply for the spraying process. The return line (4) sends the workpieces that have completed spraying back to the designated position or into the next process. The feeding conveyor line (6) transports the workpieces to be sprayed to the spraying workshop (1).

2. The automated production line for axle spraying according to claim 1, characterized in that: The spraying workshop (1) consists of an axle cleaning room (7), a paint spraying room (8), a lifting material receiving rack 1 (9), a drying room (10) and a lifting material receiving rack 2 (11). The axle cleaning room (7) pre-cleans the surface of the axle. The paint spraying room (8) is equipped with spraying equipment and a control system to complete the spraying operation. The lifting material receiving rack 1 (9) and the lifting material receiving rack 2 (11) receive and place the workpieces at different heights through lifting actions. The drying room (10) dries the sprayed workpieces.

3. The automated production line for axle spraying according to claim 2, characterized in that: The lifting material receiving rack 1 (9) and the lifting material receiving rack 2 (11) consist of a roller conveyor line module (18), a hydraulic lifting control system (19), a lift traveling part (20) and a scissor lift mechanism (21). The roller conveyor line module (18) is used to transport the workpieces. The hydraulic lifting control system (19) controls the lifting action of the lifting material receiving rack. The lift traveling part (20) is responsible for the horizontal movement of the lifting material receiving rack. The scissor lift mechanism (21) realizes smooth lifting.

4. The automated production line for axle spraying according to claim 1, characterized in that: The disc machine (3) is composed of an electromagnet suction cup (12), a disc machine cross beam (13), a truss manipulator (14), a disc machine longitudinal beam (15), a tray storage board (16) and a truss support (17). The electromagnet suction cup (12) is used to adsorb and fix the paint trays. The disc machine cross beam (13) and the disc machine longitudinal beam (15) form a frame structure to provide overall support. The truss manipulator (14) is responsible for moving and adjusting the position of the paint trays. The tray storage board (16) is used to store the unused paint trays. The truss support (17) provides additional stability for the entire device.

5. An automated production line for axle spraying according to claim 4, characterized in that: The truss manipulator (14) is driven by a servo motor to move along the disc machine cross beam (13) and the disc machine longitudinal beam (15) to achieve precise positioning of the paint trays.

6. An automated production line for axle spraying according to claim 1, characterized in that: The automated production line further includes an axle spraying and flipping mechanism, which is composed of a roller drive motor (22), a lifting hydraulic cylinder (23), a main body support frame (24), a driving flipping roller (25), an independent conveying unit (26), a driven flipping roller (27), a flipping mechanism bottom plate (28), a connecting panel (29) and a translation drive mechanism (30). The roller drive motor (22) drives the rollers to rotate and drives the axle to rotate. The lifting hydraulic cylinder (23) is used to lift the axle. The main body support frame (24) provides overall support. The driving flipping roller (25) and the driven flipping roller (27) are used to flip the axle. The independent conveying unit (26) facilitates maintenance and replacement. The flipping mechanism bottom plate (28) provides a stable foundation. The connecting panel (29) and the translation drive mechanism (30) are used to connect and drive the translational movement of the flipping mechanism.

7. An automated production line for axle spraying according to claim 6, characterized in that: The driving flipping roller (25) and the driven flipping roller (27) achieve synchronous flipping through gear meshing to ensure that there is no dead angle coverage during the spraying process of the axle.

8. An automated production line for axle spraying as described in claim 1, characterized in that: The AGV material conveying line is composed of an AGV track (31), a roller conveying unit (32), a receiving trolley (33), a photoelectric sensor (34) and a limit block (35). The AGV track (31) is the track for the automatic guided vehicle to run. The roller conveying unit (32) is used to convey workpieces. The receiving trolley (33) is used to receive and transport workpieces. The photoelectric sensor (34) detects the position and state of the workpiece. The limit block (35) restricts the position of the workpiece to prevent sliding.

9. The automated production line for axle spraying as described in claim 1 is characterized in that: The second-layer drying line roller conveying unit is composed of a conveying unit support leg (36), a photoelectric sensor (37), a roller (38), a chain (39), a driven sprocket (40), a power shaft support block (41), a power conversion support frame (42), a power shaft (43), a main power input sprocket (44) and a clutch (45). The conveying unit support leg (36) supports the leg structure of the conveying unit. The photoelectric sensor (37) detects the position and state of the workpiece. The roller (38) is used to convey workpieces. The chain (39) and the driven sprocket (40) constitute a part of the transmission system to drive the roller to rotate. The power shaft support block (41) and the power conversion support frame (42) support the power shaft and the conversion device. The power shaft (43) and the main power input sprocket (44) are the main components for power transmission. The clutch (45) controls the engagement and separation of power.

Images