A precise spraying device for brake pad surface ceramic coating

Abstract

A kind of brake pad surface ceramic coating precision spraying device, it relates to brake pad surface spraying equipment technical field, including front processing unit, precision spraying unit, post-processing unit and conveying transfer assembly.The front processing unit realizes brake pad incoming material identification, oil removal degreasing, hot air drying and secondary positioning;Precision spraying unit is provided with Y type rotating stand and multiple groups of detachable shielding plates, which can be quickly changed to adapt to different models of brake pad, and the electrostatic spraying gun carried by five-axis mechanical arm completes conformal precision spraying;The post-processing unit realizes coating curing and drying and appearance visual inspection.The present application can realize the integrated continuous operation of brake pad ceramic coating pretreatment, spraying, curing and detection, and shield and protect the non-spraying area;Detachable shielding plate cooperates with lifting structure to adapt to brake pads of different specifications and thickness, electrostatic spraying improves coating uniformity and improves paint utilization;By online visual inspection, defective products are screened out, manual intervention is reduced, and spraying processing precision and batch production efficiency are improved.

Description

Technical Field

[0001] This invention relates to the field of brake pad surface spraying equipment technology, and more specifically to a precision spraying device for ceramic coating on brake pad surfaces. Background Technology

[0002] Brake pads are the core safety component of a car's braking system. The ceramic coating on their surface can effectively improve the high temperature resistance, wear resistance, noise reduction, and corrosion resistance of brake pads, which is a key process for improving the service life and braking stability of brake pads.

[0003] Currently, ceramic coating spraying for brake pads has become an important process in brake pad production. With the large-scale development of the automotive industry, the market's requirements for the precision, consistency, production efficiency, and automation of brake pad spraying are continuously increasing.

[0004] Currently, traditional brake pad ceramic coating spraying equipment has many shortcomings in actual production applications. Most spraying equipment in the industry is a separate and independent device, with pretreatment, spraying, and post-curing and testing processes being independent of each other. Workpieces need to be manually transferred between the various devices, which not only fragments the production process and causes intermittent processing rhythm, but also makes it easy to cause brake pad damage and workpiece positioning deviation during manual transfer, significantly reducing the spraying accuracy and product qualification rate, and failing to meet the needs of mass automated production.

[0005] In the pretreatment process before spraying, traditional processing methods only use simple blowing or manual wiping to clean the surface of the workpiece, which cannot completely remove oil and impurities from the surface of the brake pads. This can easily lead to quality problems such as blistering, peeling, and insufficient adhesion of the subsequent ceramic coating. At the same time, there is a lack of standardized cleaning, drying, and positioning processes. The wastewater from cleaning is spilled at will, which can pollute the working environment. Furthermore, the positional deviations generated during the workpiece transportation process cannot be corrected in time, which further aggravates the spraying position error and results in poor product processing consistency.

[0006] In the core spraying process, traditional spraying equipment suffers from poor versatility. Different models and specifications of brake pads require different spraying areas, and existing masking fixtures, with their fixed structures, cannot meet the masking and protection needs of various brake pad models. This leads to paint overflow and paint contamination of non-sprayed areas, requiring subsequent manual grinding and cleaning, increasing processing steps and labor costs. Furthermore, changing and adjusting traditional masking fixtures is cumbersome and time-consuming, severely impacting production efficiency. They also cannot adaptively adjust the masking height according to brake pad thickness, resulting in poor fit between the masking plate and the workpiece, allowing paint to easily seep through gaps and compromising spraying accuracy. In addition, traditional spraying mechanisms often use fixed angles and fixed trajectories, which cannot adapt to the irregular curved contours of brake pads, resulting in poor coating thickness uniformity, low paint powder coverage, significant waste, and insufficient spraying quality stability.

[0007] In the post-coating process, traditional equipment relies solely on natural air drying or simple baking to cure the coating. The curing temperature cannot be precisely controlled, which easily leads to problems such as incomplete coating curing and substandard bonding strength. Furthermore, there is a lack of online quality inspection mechanisms, and the quality of the coating is judged solely by manual visual inspection. This results in low inspection accuracy, a high rate of missed inspections, and a large number of defective products flowing into the finished product stage. This makes product quality control difficult and the overall level of automation and intelligence in production is low.

[0008] In conclusion, the existing technology obviously has inconveniences and defects in practical use, so it is necessary to improve it. Summary of the Invention

[0009] To address the shortcomings of existing technologies, this invention provides a precision spraying device for ceramic coating on brake pad surfaces. This device solves the problems of existing brake pad ceramic coating spraying equipment, such as: lack of reliable shielding of non-sprayed areas of the workpiece, leading to overflow and material spillage; poor tooling versatility, cumbersome changeover, and difficulty in adapting to multiple brake pad specifications; poor spraying uniformity and low paint utilization; and fragmented pretreatment, spraying, and post-treatment processes, making continuous automated operation difficult.

[0010] To achieve the above objectives, the present invention provides the following technical solution: A precision spraying device for ceramic coating on brake pad surface includes a pretreatment unit, a precision spraying unit, and a posttreatment unit, with conveying and transfer components between each unit.

[0011] As an optimized solution, the precision spraying unit includes a support base, an integrated electrical control box is fixed on the upper surface of the support base, a spraying treatment box is supported and fixed on the upper surface of the integrated electrical control box, and a rotating spraying masking component is provided inside the spraying treatment box.

[0012] As an optimized solution, a circular spraying connection port is provided on the front longitudinal outer wall of the spraying treatment box, and a vertically extending lifting clearance port is provided on the rear longitudinal outer wall of the spraying treatment box.

[0013] As an optimized solution, the rotating spray masking assembly includes a square lifting mounting base, which is closely attached to the longitudinal inner wall of the spray treatment box and directly opposite the lifting clearance opening.

[0014] As an optimized solution, a rotary drive motor is fixed on the longitudinal outer wall of the back of the lifting mounting base. The output shaft of the rotary drive motor passes through the lifting mounting base and is fixed with a Y-shaped rotating frame. The three branch ends of the Y-shaped rotating frame are respectively fixed with connecting base plates.

[0015] As an optimized solution, each of the connecting substrates has a spray coating avoidance opening in the middle portion.

[0016] As an optimized solution, each of the connecting substrates is fixed with a mounting sleeve on its outer end face, and a detachable shielding plate is fixedly installed in each mounting sleeve. Each detachable shielding plate has a spray masking opening in its middle part.

[0017] As an optimized solution, a support platform is fixed on the front longitudinal outer wall of the integrated electrical control box. A multi-axis adaptive spraying assembly is provided on the support platform. The multi-axis adaptive spraying assembly includes a five-axis robotic arm. The end of the five-axis robotic arm passes through the spraying connection port and extends into the spraying treatment box. An electrostatic spraying gun is fixed to the end of the five-axis robotic arm.

[0018] As an optimized solution, a fixed square base is installed on the upper surface of the support pedestal.

[0019] As an optimized solution, a steering drive motor is provided on the lower surface of the support base facing the fixed square base. The output shaft end of the steering drive motor passes upward through the fixed square base and is fixed to a disc steering table. The five-axis robotic arm is mounted on the upper surface of the disc steering table.

[0020] As an optimized solution, the end of the electrostatic spray gun is fixedly connected to a feeding hose, and a paint supply box is fixed on the front longitudinal outer wall of the integrated electrical control box. The end of the feeding hose is arranged along the five-axis robotic arm, and the end of the feeding hose passes downward through the support base and is fixedly connected to the paint supply box.

[0021] As an optimized solution, the spraying treatment box is equipped with two drive threaded rods, which are respectively located on the lateral sides of the lifting clearance opening. The upper end of each drive threaded rod is rotatably mounted on the inner top surface of the spraying treatment box, and the lower end is rotatably mounted on the inner bottom surface of the spraying treatment box.

[0022] As an optimized solution, the drive threaded rod passes through and is threadedly connected to the lifting mounting base.

[0023] As an optimized solution, two transversely symmetrical drive motors are fixed at the upper surface side edge of the spraying treatment box. The two drive motors are positioned opposite the two drive threaded rods and are respectively connected to the two drive threaded rods for transmission.

[0024] As an optimized solution, the upper surface of the spraying treatment box is provided with a longitudinally extending quick-release replacement port. The size of the quick-release replacement port is larger than the size of the Y-shaped rotating frame. When the Y-shaped rotating frame rotates at a certain angle so that the connecting base plate is directly facing the quick-release replacement port, the removable shielding plate can be quickly replaced.

[0025] As an optimized solution, the quick-release replacement port is provided with a closed cover plate on the outside, and the closed cover plate is detachably installed on the upper surface of the spraying treatment box.

[0026] As an optimized solution, each of the two transverse outer walls near the lower end of the spraying treatment box is provided with an inlet or outlet, and the lower end of the inlet or outlet is flush with the inner bottom surface of the spraying treatment box.

[0027] As an optimized solution, the conveying and transfer assembly includes two longitudinally symmetrical conveying support frames. The conveying support frames are U-shaped frames with their openings facing downwards. The lower ends of the conveying support frames are supported on the ground, and the middle sections of the conveying support frames pass through the two inlet and outlet ports in sequence.

[0028] As an optimized solution, a conveying roller is rotatably installed at each of the front and rear ends of the two conveying support frames, and two longitudinally symmetrical conveying belts are sleeved between the two conveying rollers, with a certain distance between the middle of the two conveying belts.

[0029] As an optimized solution, a conveying drive motor is fixed on the longitudinal outer wall of one of the conveying support frames, and the end of the output shaft of the conveying drive motor passes through the conveying support frame and is fixed to the center of the side end face of the corresponding conveying roller.

[0030] As an optimized solution, two horizontally symmetrical lifting and telescopic cylinders are fixed in the middle of the upper surface of the integrated electrical control box. The upper telescopic end of the lifting and telescopic cylinder passes through the spraying treatment box and is fixed with a lifting pallet. The lifting pallet is located between the two conveyor belts.

[0031] As an optimized solution, the pretreatment unit includes a pretreatment upper cover, which is a U-shaped cover with the opening facing downwards, and the lower end of the pretreatment upper cover is fixed to the upper surface of the two conveying support frames respectively.

[0032] As an optimized solution, a pre-processing base plate is provided below the pre-processing upper box cover, and the pre-processing base plate is fixed on the lower surface of the two conveying support frames.

[0033] As an optimized solution, a feeding positioning box is fixed on the transverse side end face of the pretreatment upper box cover near the conveyor roller. The feeding positioning box is a square box with openings at the top and bottom, and the lower end of the feeding positioning box is slightly higher than the upper surface of the conveyor belt.

[0034] As an optimized solution, a guide slide is installed on each longitudinal inner wall of the feeding and positioning box. The guide slide can be disassembled and replaced according to the model of the brake pads to be processed in the batch.

[0035] As an optimized solution, a vertical top support telescopic cylinder is fixed to one side of the upper surface of the pretreatment base plate, and a square material dropping plate is fixed to the upper telescopic end of the top support telescopic cylinder. The size of the material dropping plate is smaller than the opening size of the loading positioning box.

[0036] As an optimized solution, the pretreatment upper cover is provided with, from front to back, an incoming material inspection component, an oil removal and degreasing component, a drying component, and a secondary positioning component.

[0037] As an optimized solution, the incoming material inspection component includes a front-facing recognition camera, which is fixed on the inner top surface of the pre-processing upper box cover, and a data analysis box electrically connected to the front-facing recognition camera is fixed on the upper surface of the pre-processing upper box cover.

[0038] As an optimized solution, the degreasing and oil removal assembly includes a water supply tank, which is fixed on the upper surface of the pretreatment upper tank cover. A spray seat connected to the water supply tank is fixed on the inner top surface of the pretreatment upper tank cover, and several pressurized nozzles are fixed longitudinally on the lower surface of the spray seat.

[0039] As an optimized solution, a water pump is fixed on the longitudinal outer wall of one of the conveying support frames, a water supply pipe is fixedly connected to the water pump, and the end of the water supply pipe is fixedly connected to the water supply tank.

[0040] As an optimized solution, a wastewater collection hopper is fixed to the lower surface of the pretreatment base plate, and a drain outlet connected to the wastewater collection hopper is provided on the pretreatment base plate. The wastewater collection hopper is positioned directly opposite the water supply tank. A vertical square pipe is fixedly connected to the lower end of the wastewater collection hopper, and a wastewater storage tank is fixedly connected to the lower end of the vertical square pipe. The lower end of the wastewater storage tank is grounded, and a wastewater discharge pipe is fixedly connected to the front longitudinal outer wall of the wastewater storage tank.

[0041] As an optimized solution, the drying process assembly includes a top air box, which is a closed square box. The top air box is fixed to the upper surface of the pretreatment upper box cover. A compressor is fixed in the middle of the upper surface of the top air box. The compressor is connected to two air inlet pipes, and the ends of the two air inlet pipes are respectively fixed to the top air box.

[0042] As an optimized solution, two electric heating tubes are fixed on the inner top surface of the top air box.

[0043] As an optimized solution, an airflow transfer box is fixed on each longitudinal outer wall of the pretreatment upper box cover, and an air outlet connected to the airflow transfer box is opened on the longitudinal side wall of the pretreatment upper box cover.

[0044] As an optimized solution, an airflow distribution bend is provided between the top air box and each of the airflow transfer boxes. The airflow distribution bend is fixed on the outer wall of the pretreatment upper box cover. One end of the airflow distribution bend is fixedly connected to the top air box, and the other end is fixedly connected to the airflow transfer box.

[0045] As an optimized solution, the secondary positioning component includes a lifting positioning seat, and an electrically controlled telescopic cylinder is fixed on the inner top surface of the pretreatment upper box cover. The lower telescopic end of the electrically controlled telescopic cylinder is fixedly connected to the upper surface of the lifting positioning seat.

[0046] As an optimized solution, a lifting control module is fixed on the upper surface of the pretreatment upper box cover, and the lifting control module is electrically connected to the electric telescopic cylinder.

[0047] As an optimized solution, the lower surface of the lifting positioning seat is provided with three electrically driven sliding grooves. The three electrically driven sliding grooves are arranged at equal intervals along the longitudinal direction. An electric slide block is slidably installed in each of the electrically driven sliding grooves, and a positioning stop is fixed on the lower surface of each electric slide block.

[0048] As an optimized solution, the post-processing unit includes a post-processing upper cover, which is a U-shaped cover with the opening facing downwards, and the lower end of the post-processing upper cover is fixed to the upper surface of the two conveying support frames respectively.

[0049] As an optimized solution, a post-processing base plate is provided below the post-processing upper box cover, and the post-processing base plate is fixed on the lower surface of the two conveying support frames.

[0050] As an optimized solution, the post-processing upper cover is provided with a curing and drying component and an appearance quality inspection component, arranged sequentially from front to back.

[0051] As an optimized solution, the curing and drying assembly includes a curing air box, which is fixed on the upper surface of the post-processing upper cover and is connected to the post-processing upper cover.

[0052] As an optimized solution, the curing air box is equipped with several temperature control tubes.

[0053] As an optimized solution, an air intake fan is fixed on the upper surface of the curing air box.

[0054] As an optimized solution, the appearance quality inspection component includes a rear-mounted recognition camera, which is fixed to the inner top surface of the upper cover of the post-processing box. A data analysis box is also fixed to the upper surface of the upper cover of the post-processing box, and the data analysis box is electrically connected to the rear-mounted recognition camera.

[0055] As an optimized solution, the rear end of the post-processing unit is provided with a finished product receiving box with an open top, and the finished product receiving box is fixed between the two conveying support frames.

[0056] Compared with the prior art, the beneficial effects of the present invention are: 1. The complete set of equipment integrates pretreatment, precision spraying, post-treatment and conveying components, realizing integrated continuous operation of brake pad ceramic coating from feeding, pretreatment, spraying and curing to finished product inspection and collection. It reduces manual transfer of workpieces between different equipment, reduces the problems of bumps and positioning deviation caused by manual intervention, improves the overall processing cycle and production continuity, and is suitable for batch automated spraying production of brake pads.

[0057] 2. The pretreatment unit is equipped with multiple processes including incoming material visual recognition, degreasing, hot air drying, and secondary positioning. It relies on camera recognition to read the brake pad model and automatically match process parameters. The spray degreasing combined with the wastewater collection and storage structure can effectively remove oil and impurities from the brake pad surface to be coated, while the cleaning wastewater is collected and treated centrally to avoid wastewater spreading and polluting the equipment's working environment. The double-sided hot air drying structure can quickly remove residual cleaning liquid from the workpiece surface, ensuring that the coating substrate is clean and dry, reducing the risk of coating blistering and peeling. The secondary positioning relies on adjustable positioning stops to correct the positional deviation caused by the workpiece conveying process, providing a reliable positional basis for the subsequent coating station and reducing coating position errors.

[0058] 3. The spraying station uses a Y-shaped rotating frame equipped with multiple sets of detachable masking plates. Different masking plates are configured with different specifications of spray masking nozzles, which can shield and protect non-spraying areas of different models of brake pads, limiting the effective spraying area and preventing ceramic coating from spraying onto non-spraying areas of the brake pads, reducing subsequent grinding and cleaning processes. The Y-shaped rotating frame can rotate to switch stations, and with the quick-release replacement port on the upper part of the housing, the detachable masking plates can be quickly installed and removed without disassembling the main body of the housing. Tooling changeover is convenient, shortening the switching and debugging time between different product models. The lifting mounting base is synchronously driven by double-sided drive threaded rods, which can adjust the vertical height of the masking plate assembly to match the height of brake pads of different thicknesses, ensuring that the masking plate can reliably adhere to the workpiece surface and reducing the phenomenon of coating leakage and overflow from gaps.

[0059] 4. The electrostatic spray gun is driven by a steering drive motor in conjunction with a disc steering table and a five-axis robotic arm. The robotic arm can achieve multi-dimensional posture adjustment, and the posture and angle of the spray gun are flexibly adjustable. It can adapt to the contour of the surface to be sprayed by the brake pad. Combined with the electrostatic spraying method, it improves the powder application rate of ceramic coating, the coating thickness uniformity is better, and the coating waste is reduced. The coating is delivered to the spray gun through a hose from a dedicated coating supply box. The supply path is arranged with the robotic arm to ensure a stable and continuous supply of coating material for spraying.

[0060] 5. The post-processing unit integrates hot air curing and drying with visual appearance inspection. Temperature-controlled hot air cures the freshly sprayed ceramic coating to ensure the coating's adhesion strength. A rear-mounted recognition camera collects the coating's forming status and performs online inspection of the coating's coverage integrity and spraying defects, enabling online quality judgment. This facilitates the rapid removal of unqualified workpieces and prevents defective products from flowing into the next stage. Processed workpieces fall directly into the finished product receiving box for collection, simplifying the finished product collection process. Attached Figure Description

[0061] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the accompanying drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0062] Figure 1 This is a schematic diagram of the overall external structure of the present invention in the main viewing direction; Figure 2 This is a schematic diagram of the overall external structure of the present invention from a top-down perspective; Figure 3 This is a schematic diagram of the overall external structure of the present invention from the right-side view direction; Figure 4 This is an isometric schematic diagram of the three-dimensional structure of the present invention; Figure 5 For the present invention along Figure 2 A schematic diagram of the internal structure cut along line AA. Figure 6 For the present invention along Figure 1 A schematic diagram of the internal structure cut along the middle BB line; Figure 7 For the present invention along Figure 1 A schematic diagram of the internal structure cut along the CC line; Figure 8 For the present invention along Figure 1 A schematic diagram of the internal structure cut along the DD line in the middle; Figure 9 For the present invention along Figure 1 A schematic diagram of the internal structure cut along the EE line; Figure 10 For the present invention along Figure 3 A half-section diagram of the three-dimensional structure cut along the FF line.

[0063] In the diagram: 1-Support base, 2-Integrated electrical control box, 3-Spraying treatment box, 4-Support platform, 5-Spraying connection port, 6-Lifting clearance port, 7-Lifting mounting seat, 8-Drive threaded rod, 9-Transmission drive motor, 10-Rotation drive motor, 11-Y-type rotating frame, 12-Connecting base plate, 13-Spraying clearance port, 14-Mounting sleeve, 15-Removable masking plate, 16-Spraying masking port, 17-Quick-release replacement port, 18-Closed cover plate, 19-Fixed square seat, 20-Steering drive motor, 21-Disc steering table, 22-Five-axis robotic arm, 23-Electrostatic spray gun, 24-Feed hose, 25-Paint supply box, 26-Inlet / outlet, 27-Conveying support frame, 28-Conveying roller, 29-Conveying belt, 30-Conveying drive motor, 31-Lifting telescopic cylinder, 32-Lifting pallet, 33-Pre-treatment upper box cover, 34-Pre-treatment 35-Base plate, 36-Feeding positioning box, 37-Guide slide, 38-Top support telescopic cylinder, 39-Unloading tray, 40-Front-facing recognition camera, 41-Data analysis box, 42-Water supply tank, 43-Sprayer seat, 44-Booster nozzle, 45-Water pump, 46-Water supply pipe, 47-Wastewater collection hopper, 48-Vertical square pipe, 49-Wastewater storage tank, 50-Wastewater discharge pipe, 51-Top air box, 52-Compressor, 53-Wastewater fan, 54-Top air box, 55-Compressor, 56-Wastewater fan, 57-Feeding positioning box, 38-Guide slide, 39-Top support telescopic cylinder, 50-Compressor, 51-Compressor, 52-Wastewater fan, 53-Wastewater fan, 54-Wastewater fan, 55-Wastewater fan, 56-Wastewater fan, 57-Wastewater fan, 58-Wastewater fan, 59-Wastewater fan, 50-Top air box, 51-Compressor, 52-Wastewater fan, 53-Wastewater fan, 54-Wastewater fan, 55-Wastewater fan, 56-Wastewater fan, 57-Wastewater fan, 58-Wastewater fan, 59-Wastewater fan, 50-Wastewater fan, 51-Wastewater fan, 52-Wastewater fan, 53-Wastewater fan, 54-Wastewater fan, 55-Wastewater fan, 56-Wastewater fan, 57-Wastewater fan, 58-Wastewater fan, 59 53-Inlet duct, 54-Electric heating element, 55-Airflow transfer box, 56-Air outlet, 57-Airflow distribution bend, 58-Lifting and positioning seat, 59-Electric telescopic cylinder, 60-Lifting control module, 61-Electric slide, 62-Positioning stop, 63-Post-processing upper box cover, 64-Post-processing base plate, 65-Curing air box, 66-Temperature control pipe, 67-Inlet fan, 68-Rear recognition camera, 69-Finished product receiving box. Detailed Implementation

[0064] The embodiments of the technical solution of the present invention will now be described in detail with reference to the accompanying drawings. These embodiments are merely illustrative of the technical solution of the present invention and are therefore intended to limit the scope of protection of the present invention.

[0065] like Figures 1 to 10 As shown, a precision spraying device for ceramic coating on brake pad surface includes a pretreatment unit, a precision spraying unit, and a posttreatment unit, with conveying and transfer components between each unit.

[0066] The precision spraying unit includes a support base 1, which is a square base that is horizontally fixed to the ground. An integrated electrical control box 2 is fixed on the upper surface of the support base 1. A spraying treatment box 3 is supported and fixed on the upper surface of the integrated electrical control box 2. A rotating spraying masking component is provided inside the spraying treatment box 3.

[0067] A support base 4 is fixed on the front longitudinal outer wall of the integrated electrical control box 2, and a multi-axis adaptive spraying assembly is provided on the support base 4.

[0068] A circular spraying connection port 5 is provided on the front longitudinal outer wall of the spraying treatment box 3, and a vertically extending lifting clearance port 6 is provided on the rear longitudinal outer wall of the spraying treatment box 3.

[0069] The rotating spray masking assembly includes a square lifting mounting base 7, which is closely attached to the longitudinal inner wall of the spray treatment box 3 and is positioned directly opposite the lifting clearance opening 6.

[0070] The spraying treatment box 3 is equipped with two drive threaded rods 8, which are located on the horizontal sides of the lifting and clearance port 6. The upper end of each drive threaded rod 8 is rotatably mounted on the inner top surface of the spraying treatment box 3, and the lower end is rotatably mounted on the inner bottom surface of the spraying treatment box 3.

[0071] The drive threaded rod 8 passes through and is threadedly connected to the lifting mounting base 7.

[0072] Two transversely symmetrical drive motors 9 are fixed at the side edge of the upper surface of the spraying treatment box 3. The two drive motors 9 are positioned opposite the two drive threaded rods 8 and are connected to the two drive threaded rods 8 respectively for transmission.

[0073] A rotary drive motor 10 is fixed on the longitudinal outer wall of the back of the lifting mounting base 7. The rotary drive motor 10 is a stepper motor. The output shaft of the rotary drive motor 10 passes through the lifting mounting base 7 and is fixed with a Y-shaped rotating frame 11. The three branches of the Y-shaped rotating frame 11 are respectively fixed with connecting base plates 12. The connecting base plates 12 are longitudinally extending square plates.

[0074] Each connecting substrate 12 has a spraying clearance opening 13 in the middle.

[0075] Each connecting base plate 12 has a mounting sleeve 14 fixed on its outer end face. Each mounting sleeve 14 has a removable shielding plate 15 fixed in place. Each removable shielding plate 15 has a spray masking opening 16 in the middle. The shape and size of the spray masking opening 16 on different removable shielding plates 15 are different to accommodate the spray masking of different types of brake pads.

[0076] The three connecting base plates 12 on the Y-shaped rotating frame 11 are equipped with three sets of detachable shielding plates 15 of different specifications, which can rotate and rotate to complete the material feeding shielding, spraying, and plate changing preparation three stations simultaneously in standby mode, without the need for frequent machine stoppages to change tooling.

[0077] The upper surface of the spraying treatment box 3 is provided with a longitudinally extending quick-release replacement port 17. The size of the quick-release replacement port 17 is larger than the size of the Y-shaped rotating frame 11. When the Y-shaped rotating frame 11 rotates at a certain angle so that the connecting base plate 12 is facing the quick-release replacement port 17, the removable shielding plate 15 can be quickly replaced.

[0078] The quick-release replacement port 17 is provided with a sealing cover 18 on the outside, and the sealing cover 18 is detachably installed on the upper surface of the spray treatment box 3.

[0079] The multi-axis adaptive spraying assembly includes a fixed base 19, which is fixedly mounted on the support base 4.

[0080] A steering drive motor 20 is provided on the lower surface of the support base 4, which is directly opposite the fixed square base 19. The output shaft of the steering drive motor 20 passes upward through the fixed square base 19 and is fixed to a disc steering table 21. A five-axis robotic arm 22 is installed on the upper surface of the disc steering table 21. The end of the five-axis robotic arm 22 passes through the spraying connection port 5 and extends into the spraying treatment box 3. An electrostatic spraying gun 23 is fixed to the end of the five-axis robotic arm 22.

[0081] The end of the electrostatic spray gun 23 is fixedly connected to a feed hose 24. A paint supply box 25 is fixed on the front longitudinal outer wall of the integrated electrical control box 2. The end of the feed hose 24 is arranged and limited along the five-axis robotic arm 22. The end of the feed hose 24 passes downward through the support base 4 and is fixedly connected to the paint supply box 25.

[0082] The feed hose 24 is fixed sequentially along the arm of the five-axis robotic arm 22 by multiple pipe clamps, with sufficient length allowance to accommodate the movement of the five-axis robotic arm 22.

[0083] On the two horizontal outer walls near the bottom of the spraying treatment box 3, there is an inlet / outlet 26. The lower end of the inlet / outlet 26 is flush with the inner bottom surface of the spraying treatment box 3.

[0084] The conveying and transfer assembly includes two longitudinally symmetrical conveying support frames 27. The conveying support frame 27 is a U-shaped frame with the opening facing downwards. The lower end of the conveying support frame 27 is supported on the ground, and the middle section of the conveying support frame 27 passes through two inlet and outlet ports 26 in sequence.

[0085] Two conveyor support frames 27 are each rotatably mounted with a conveyor roller 28 at their front and rear ends. Two longitudinally symmetrical conveyor belts 29 are sleeved between the two conveyor rollers 28, with a certain distance between the two conveyor belts 29.

[0086] A conveying drive motor 30 is fixed on the longitudinal outer wall of one of the conveying support frames 27. The output shaft end of the conveying drive motor 30 passes through the conveying support frame 27 and is fixed to the center of the side end face of the corresponding conveying roller 28.

[0087] Two horizontally symmetrical lifting and telescopic cylinders 31 are fixed in the middle of the upper surface of the integrated electrical control box 2. The upper telescopic end of the lifting and telescopic cylinder 31 passes through the spraying treatment box 3 and is fixed with a lifting pallet 32. The lifting pallet 32 ​​is located between two conveyor belts 29.

[0088] The pretreatment unit includes a pretreatment upper cover 33, which is a U-shaped cover with the opening facing downwards. The lower end of the pretreatment upper cover 33 is fixed to the upper surface of two conveying support frames 27 respectively.

[0089] A pre-processing base plate 34 is provided below the pre-processing upper box cover 33, and the pre-processing base plate 34 is fixed on the lower surface of the two conveying support frames 27.

[0090] A loading positioning box 35 is fixed on the transverse side end face of the pretreatment upper box cover 33 near the conveyor roller 28. The loading positioning box 35 is a square box with openings at the top and bottom, and the lower end of the loading positioning box 35 is slightly higher than the upper surface of the conveyor belt 29.

[0091] Each side of the loading positioning box 35 is equipped with a guide slide 36 on its longitudinal inner wall. The guide slide 36 is detachably fixed to the inner wall of the loading positioning box 35, and different models of brake pads correspond to guide slides 36 with different guide slopes.

[0092] A vertical top support telescopic cylinder 37 is fixed on one side of the upper surface of the pretreatment base plate 34. A square material dropping plate 38 is fixed on the upper telescopic end of the top support telescopic cylinder 37. The size of the material dropping plate 38 is smaller than the opening size of the loading positioning box 35.

[0093] The pretreatment upper cover 33 is equipped with, from front to back, an incoming material inspection component, an oil removal and degreasing component, a drying treatment component, and a secondary positioning component.

[0094] The incoming material inspection component includes a front-facing recognition camera 39, which is fixed on the inner top surface of the pre-processing upper box cover 33. A data analysis box 40, which is electrically connected to the front-facing recognition camera 39, is fixed on the upper surface of the pre-processing upper box cover 33.

[0095] The degreasing and oil removal assembly includes a water supply tank 41, which is fixed on the upper surface of the pretreatment upper tank cover 33. A spray seat 42 connected to the water supply tank 41 is fixed on the inner top surface of the pretreatment upper tank cover 33. Several pressurized nozzles 43 are fixed longitudinally on the lower surface of the spray seat 42.

[0096] A water pump 44 is fixed on the longitudinal outer wall of one of the conveying support frames 27. A water supply pipe 45 is fixedly connected to the water pump 44, and the end of the water supply pipe 45 is fixedly connected to the water supply tank 41.

[0097] Wastewater collection hopper 46 is fixed on the lower surface of pretreatment base plate 34. A drain outlet connected to wastewater collection hopper 46 is provided on pretreatment base plate 34. Wastewater collection hopper 46 is set directly opposite water supply tank 41. A vertical square pipe 47 is fixedly connected to the lower end of wastewater collection hopper 46. A wastewater storage tank 48 is fixedly connected to the lower end of vertical square pipe 47. The lower end of wastewater storage tank 48 is grounded. A wastewater discharge pipe 49 is fixedly connected to the longitudinal outer wall of the front side of wastewater storage tank 48.

[0098] According to production needs, a wastewater filtration and circulation system can be added, and the wastewater storage tank 48 is connected to the water supply tank 41 after filtration, so as to realize the recycling of cleaning solution.

[0099] The drying process assembly includes a top air box 50, which is a closed square box. The top air box 50 is fixed on the upper surface of the pretreatment upper box cover 33. A compressor 51 is fixed in the middle of the upper surface of the top air box 50. Two air inlet pipes 52 are connected to the compressor 51. The ends of the two air inlet pipes 52 are respectively fixed to the top air box 50.

[0100] Two electric heating tubes 53 are fixed on the inner top surface of the top air box 50.

[0101] Each longitudinal outer wall of the pretreatment upper cover 33 is fixed with an airflow transfer box 54, and an air outlet 55 connected to the airflow transfer box 54 is opened on the longitudinal side wall of the pretreatment upper cover 33.

[0102] An air distribution bend 56 is provided between the top air box 50 and each airflow transfer box 54. The air distribution bend 56 is fixed on the outer wall of the pretreatment upper box cover 33. One end of the air distribution bend 56 is fixedly connected to the top air box 50, and the other end is fixedly connected to the airflow transfer box 54.

[0103] The secondary positioning component includes a lifting positioning seat 57, and an electrically controlled telescopic cylinder 58 is fixed on the inner top surface of the pretreatment upper box cover 33. The lower telescopic end of the electrically controlled telescopic cylinder 58 is fixedly connected to the upper surface of the lifting positioning seat 57.

[0104] A lifting control module 59 is fixed on the upper surface of the pretreatment upper box cover 33, and the lifting control module 59 is electrically connected to the electric telescopic cylinder 58.

[0105] The lower surface of the lifting positioning seat 57 is provided with three electrically driven slide grooves. The three electrically driven slide grooves are arranged at equal intervals along the longitudinal direction. An electric slide block 60 is slidably installed in each electrically driven slide groove. A positioning stop 61 is fixed on the lower surface of each electric slide block 60.

[0106] The post-processing unit includes a post-processing upper cover 62, which is a U-shaped cover with the opening facing downwards. The lower end of the post-processing upper cover 62 is fixed to the upper surface of two conveying support frames 27.

[0107] A post-processing base plate 63 is provided below the post-processing upper box cover 62, and the post-processing base plate 63 is fixed on the lower surface of the two conveying support frames 27.

[0108] The post-processing upper cover 62 is equipped with a curing and drying component and an appearance quality inspection component, arranged sequentially from front to back.

[0109] The curing and drying assembly includes a curing air box 64, which is fixed on the upper surface of the post-processing upper cover 62 and is connected to the post-processing upper cover 62.

[0110] The curing air box 64 is equipped with several temperature control pipes 65.

[0111] An air intake fan 66 is fixed on the upper surface of the curing air box 64.

[0112] The appearance quality inspection component includes a rear recognition camera 67, which is fixed on the inner top surface of the post-processing upper cover 62. A data analysis box 40, which is electrically connected to the rear recognition camera 67, is also fixed on the upper surface of the post-processing upper cover 62.

[0113] The rear end of the post-processing unit is provided with a finished product receiving box 68 with an open top, and the finished product receiving box 68 is fixed between two conveyor support frames 27.

[0114] When using this invention: First, the brake pads are inserted through the upper opening of the loading and positioning box 35. The top support telescopic cylinder 37 is extended, driving the unloading tray 38 to rise and support the brake pads. Then, the top support telescopic cylinder 37 is shortened, and the unloading tray 38 descends. During the slow descent, the brake pads are initially guided and limited by the guide slide 36 inside the loading and positioning box 35. After the unloading tray 38 descends below the two conveyor belts 29, the brake pads are intercepted on the two conveyor belts 29 with both ends overlapping them. The conveyor drive motor 30 is started, driving the conveyor roller 28 to rotate and driving the conveyor belts 29 to transport the brake pads backward into the pre-processing unit.

[0115] The brake pads are first transferred to the incoming material inspection station, where the front-facing recognition camera 39 captures images of the brake pads. The image data is then transmitted to the data analysis box 40 to identify the brake pad model and basic appearance status, confirm the brake pad model, and complete the matching of preset process parameters.

[0116] After identification, the brake pads are conveyed to the degreasing station. The water pump 44 is started to pump the spray liquid into the water supply tank 41, and then sprays it downward through multiple sets of pressurized nozzles 43 on the spray seat 42 for degreasing and cleaning of the surface of the brake pads to be coated. The wastewater generated by cleaning flows through the pretreatment base plate 34 into the wastewater collection hopper 46, and flows into the wastewater storage tank 48 through the vertical square pipe 47 for temporary storage. The wastewater can be discharged periodically through the wastewater discharge pipe 49.

[0117] After cleaning, the brake pads continue to be conveyed to the drying station. The compressor fan 51 is started to input airflow into the top air box 50. The airflow is heated after passing through the electric heating tube 53 and sent to the airflow transfer boxes 54 on both sides through the airflow distribution bend 56. Then, it is blown onto the brake pads from the air outlet 55 to dry the brake pads with hot air from both sides, removing residual cleaning fluid from the surface of the brake pads and ensuring that the coating base is clean and dry.

[0118] Once the brake pads have dried, they arrive at the secondary positioning station. The lifting control module 59 controls the extension of the electric telescopic cylinder 58, which in turn moves the lifting positioning seat 57 downward. The three electric slide seats 60 slide to adjust their positions to match the outline of the brake pads. The positioning stop 61 completes the secondary precise positioning of the brake pads, corrects the positional deviation of the brake pads, and prepares them for transfer to the spraying station.

[0119] After pretreatment, the brake pads continue to move along the conveyor belt 29, passing through the inlet / outlet 26 on one side of the spraying treatment box 3 and entering its interior. Upon reaching the spraying station, the lifting telescopic cylinder 31 drives the lifting pallet 32 ​​to rise, lifting the brake pads between the two conveyor belts 29 and detaching them from the conveyor belts 29 to facilitate the spraying operation. At this time, the conveyor belts 29 can continue to idle or be paused.

[0120] Two drive motors 9 drive two drive threaded rods 8 to rotate synchronously, causing the lifting mounting base 7 to move vertically along the lifting clearance port 6, adjusting the vertical height of the Y-shaped rotating frame 11, connecting base plate 12, and detachable shielding plate 15 to match the spraying height of the brake pads; at the same time, the rotation drive motor 10 is started, driving the Y-shaped rotating frame 11 to rotate, causing one set of connecting base plates 12 to rotate to a position facing the brake pad spraying working surface. The detachable shielding plate 15 corresponding to this position is abutted and positioned against the non-spraying area of ​​the brake pad, and the actual spraying area is limited by the spraying shielding port 16. The remaining non-spraying areas are blocked by the detachable shielding plate 15 to prevent ceramic coating from being sprayed accidentally; if it is necessary to switch to different models of brake pads, the closed cover plate 18 can be opened, the Y-shaped rotating frame 11 can be rotated, the connecting base plate 12 can be aligned with the quick-release replacement port 17, and the detachable shielding plate 15 of the corresponding spraying shielding port 16 can be directly removed and replaced to complete the tooling change.

[0121] The steering drive motor 20 on the support base 4 drives the disc steering table 21 to rotate, adjusting the overall rotation angle of the five-axis robotic arm 22. The end of the five-axis robotic arm 22 passes through the spraying connection port 5 and extends into the spraying treatment box 3, driving the electrostatic spray gun 23 to make multi-dimensional posture adjustments around the brake pads. The ceramic coating paint inside the paint supply box 25 is delivered to the electrostatic spray gun 23 through the supply hose 24. The electrostatic spray gun 23 performs ceramic coating electrostatic spraying on the brake pad working surface that has been shielded and defined. After the spraying operation is completed, the five-axis robotic arm 22 retracts to avoid the internal space of the spraying chamber.

[0122] After the spraying is completed, the lifting telescopic cylinder 31 drives the lifting pallet 32 ​​to fall back, and the brake pads fall back onto the surface of the two conveyor belts 29. The conveyor belts 29 continue to run, and the brake pads are sent out of the spraying treatment box 3 from the other side inlet 26 and enter the post-processing unit.

[0123] The brake pads enter the aftertreatment upper cover 62 and first reach the curing and drying component station. The air intake fan 66 supplies air to the curing air box 64. After the airflow is regulated by the temperature control pipe 65, it is sent into the cavity of the aftertreatment upper cover to cure and dry the ceramic coating that has just been sprayed on the surface of the brake pads with hot air, so that the coating is formed and cured.

[0124] After curing, the brake pads are conveyed to the appearance quality inspection station. The rear-mounted recognition camera 67 captures images of the forming state of the ceramic coating on the brake pads, and the data is sent to the data analysis box 40 to detect quality indicators such as coating coverage integrity and spraying defects, thus completing the quality judgment of the finished product after spraying. The inspected brake pads continue to be conveyed by the conveyor belt 29 and are finally collected by the finished product receiving box 68, completing the entire processing flow.

[0125] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be covered within the scope of the claims and specification of the present invention.

Claims

1. A precision spraying device for ceramic coating on brake pad surface, characterized in that: It includes a pretreatment unit, a precision spraying unit, and a posttreatment unit, with conveying and transfer components between each unit; The precision spraying unit includes a support base, an integrated electrical control box is fixed on the upper surface of the support base, a spraying treatment box is supported and fixed on the upper surface of the integrated electrical control box, and a rotating spraying masking component is provided inside the spraying treatment box. A circular spraying connection port is provided on the front longitudinal outer wall of the spraying treatment box, and a vertically extending lifting clearance port is provided on the rear longitudinal outer wall of the spraying treatment box. The rotating spray masking assembly includes a square lifting mounting base, which is closely attached to the longitudinal inner wall of the spray treatment box and is positioned directly opposite the lifting clearance opening. A rotary drive motor is fixed on the longitudinal outer wall of the back of the lifting mounting base. The output shaft of the rotary drive motor passes through the lifting mounting base and is fixed with a Y-shaped rotating frame. The three branch ends of the Y-shaped rotating frame are respectively fixed with connecting base plates. Each of the aforementioned connecting substrates has a spray coating clearance opening in the middle portion; Each of the connecting substrates is fixed with a mounting sleeve on its outer end face, and a detachable shielding plate is fixedly installed in each mounting sleeve. Each detachable shielding plate has a spray masking opening in the middle part. A support platform is fixed on the front longitudinal outer wall of the integrated electrical control box. A multi-axis adaptive spraying assembly is provided on the support platform. The multi-axis adaptive spraying assembly includes a five-axis robotic arm. The end of the five-axis robotic arm passes through the spraying connection port and extends into the spraying treatment box. An electrostatic spraying gun is fixed to the end of the five-axis robotic arm.

2. The precision spraying device for ceramic coating on brake pad surface according to claim 1, characterized in that: A fixed square base is installed on the upper surface of the support pedestal; The lower surface of the support base is provided with a steering drive motor facing the fixed square base. The output shaft end of the steering drive motor passes upward through the fixed square base and is fixed with a disc steering table. The five-axis robotic arm is mounted on the upper surface of the disc steering table. The end of the electrostatic spray gun is fixedly connected to a feeding hose. A paint supply box is fixed on the front longitudinal outer wall of the integrated electrical control box. The end of the feeding hose is arranged along the five-axis robotic arm. The end of the feeding hose passes downward through the support base and is fixedly connected to the paint supply box.

3. The precision spraying device for ceramic coating on brake pad surface according to claim 1, characterized in that: The spraying treatment box is equipped with two drive threaded rods, which are respectively located on the lateral sides of the lifting clearance opening. The upper end of each drive threaded rod is rotatably mounted on the inner top surface of the spraying treatment box, and the lower end is rotatably mounted on the inner bottom surface of the spraying treatment box. The drive threaded rod passes through and is threadedly connected to the lifting mounting base; Two transversely symmetrical drive motors are fixed at the upper surface side edge of the spraying treatment box. The two drive motors are positioned opposite the two drive threaded rods and are respectively connected to the two drive threaded rods for transmission.

4. The precision spraying device for ceramic coating on brake pad surface according to claim 1, characterized in that: The upper surface of the spraying treatment box is provided with a longitudinally extending quick-release replacement port. The size of the quick-release replacement port is larger than the size of the Y-shaped rotating frame. When the Y-shaped rotating frame is rotated at a certain angle so that the connecting base plate is directly facing the quick-release replacement port, the removable shielding plate can be quickly replaced. The quick-release replacement port is provided with a closed cover plate on the outside, and the closed cover plate is detachably installed on the upper surface of the spraying treatment box.

5. The precision spraying device for ceramic coating on brake pad surface according to claim 1, characterized in that: The spraying treatment box has an inlet and outlet on each of the two transverse outer walls near the lower end, and the lower end of the inlet and outlet is flush with the inner bottom surface of the spraying treatment box. The conveying and transfer assembly includes two longitudinally symmetrical conveying support frames. The conveying support frames are U-shaped frames with their openings facing downwards. The lower ends of the conveying support frames are supported on the ground, and the middle sections of the conveying support frames pass through the two inlet and outlet ports in sequence. Each of the two conveyor support frames has a conveyor roller rotatably mounted at its front and rear ends. Two longitudinally symmetrical conveyor belts are fitted between the two conveyor rollers, with a certain distance between the two conveyor belts in the middle. A conveying drive motor is fixed on the longitudinal outer wall of one of the conveying support frames, and the end of the output shaft of the conveying drive motor passes through the conveying support frame and is fixed to the center of the side end face of the corresponding conveying roller; Two horizontally symmetrical lifting and telescopic cylinders are fixed in the middle of the upper surface of the integrated electrical control box. The upper telescopic end of the lifting and telescopic cylinder passes through the spraying treatment box and is fixed with a lifting pallet. The lifting pallet is located between the two conveyor belts.

6. The precision spraying device for ceramic coating on brake pad surface according to claim 5, characterized in that: The pretreatment unit includes a pretreatment upper box cover, which is a U-shaped cover with the opening facing downwards. The lower end of the pretreatment upper box cover is fixed to the upper surface of the two conveying support frames respectively. A pre-processing base plate is provided below the pre-processing upper box cover, and the pre-processing base plate is fixed on the lower surface of the two conveying support frames; A feeding positioning box is fixed on the transverse side end face of the pretreatment upper box cover near the conveyor roller. The feeding positioning box is a square box with openings at the top and bottom, and the lower end of the feeding positioning box is slightly higher than the upper surface of the conveyor belt. Each of the longitudinal inner walls of the feeding and positioning box is equipped with a guide slide, which can be disassembled and replaced according to the model of the brake pads to be processed in the batch. A vertical top support telescopic cylinder is fixed to one side of the upper surface of the pretreatment base plate. A square material dropping plate is fixed to the upper telescopic end of the top support telescopic cylinder. The size of the material dropping plate is smaller than the opening size of the loading positioning box.

7. The precision spraying device for ceramic coating on brake pad surface according to claim 6, characterized in that: The pretreatment upper box cover is equipped with, from front to back, an incoming material inspection component, an oil removal and degreasing component, a drying component, and a secondary positioning component; The incoming material inspection component includes a front-facing recognition camera, which is fixed on the inner top surface of the pre-processing upper box cover. A data analysis box electrically connected to the front-facing recognition camera is fixed on the upper surface of the pre-processing upper box cover. The degreasing and oil removal assembly includes a water supply tank, which is fixed on the upper surface of the pretreatment upper tank cover. A spray seat connected to the water supply tank is fixed on the inner top surface of the pretreatment upper tank cover. Several pressurized nozzles are fixed on the lower surface of the spray seat along the longitudinal direction. A water pump is fixed on the longitudinal outer wall of one of the conveying support frames, and a water supply pipe is fixedly connected to the water pump. The end of the water supply pipe is fixedly connected to the water supply tank. A wastewater collection hopper is fixed to the lower surface of the pretreatment base plate. A drain outlet connected to the wastewater collection hopper is provided on the pretreatment base plate. The wastewater collection hopper is positioned directly opposite the water supply tank. A vertical square pipe is fixedly connected to the lower end of the wastewater collection hopper. A wastewater storage tank is fixedly connected to the lower end of the vertical square pipe. The lower end of the wastewater storage tank is grounded. A wastewater discharge pipe is fixedly connected to the front longitudinal outer wall of the wastewater storage tank.

8. The precision spraying device for ceramic coating on brake pad surface according to claim 7, characterized in that: The drying process assembly includes a top air box, which is a closed square box. The top air box is fixed on the upper surface of the pretreatment upper box cover. A compressor is fixed in the middle of the upper surface of the top air box. The compressor is connected to two air inlet pipes, and the ends of the two air inlet pipes are respectively fixed to the top air box. Two electric heating tubes are fixed on the inner top surface of the top air box; An airflow transfer box is fixed on each longitudinal outer wall of the pretreatment upper box cover, and an air outlet connected to the airflow transfer box is opened on the longitudinal side wall of the pretreatment upper box cover. An air distribution bend is provided between the top air box and each of the air transfer boxes. The air distribution bend is fixed on the outer wall of the pretreatment upper box cover. One end of the air distribution bend is fixedly connected to the top air box, and the other end is fixedly connected to the air transfer box. The secondary positioning component includes a lifting positioning seat, and an electrically controlled telescopic cylinder is fixed on the inner top surface of the pretreatment upper box cover. The lower telescopic end of the electrically controlled telescopic cylinder is fixedly connected to the upper surface of the lifting positioning seat. A lifting control module is fixed on the upper surface of the pretreatment upper box cover, and the lifting control module is electrically connected to the electric telescopic cylinder. The lower surface of the lifting positioning seat is provided with three electrically driven sliding grooves. The three electrically driven sliding grooves are arranged at equal intervals along the longitudinal direction. An electric slide block is slidably installed in each of the electrically driven sliding grooves. A positioning stop is fixed on the lower surface of each electric slide block.

9. The precision spraying device for ceramic coating on brake pad surface according to claim 7, characterized in that: The post-processing unit includes a post-processing upper cover, which is a U-shaped cover with the opening facing downwards. The lower end of the post-processing upper cover is fixed to the upper surface of the two conveying support frames respectively. A post-processing base plate is provided below the post-processing upper box cover, and the post-processing base plate is fixed on the lower surface of the two conveying support frames; The post-processing upper chamber cover is equipped with a curing and drying component and an appearance quality inspection component, arranged sequentially from front to back.

10. A precision spraying device for ceramic coating on brake pad surface according to claim 9, characterized in that: The curing and drying assembly includes a curing air box, which is fixed to the upper surface of the post-processing upper box cover and is connected to the post-processing upper box cover. The curing air box is equipped with several temperature control tubes; An air intake fan is fixed on the upper surface of the curing air box; The appearance quality inspection component includes a rear-mounted recognition camera, which is fixed to the inner top surface of the upper cover of the post-processing box. A data analysis box is also fixed to the upper surface of the upper cover of the post-processing box, and the data analysis box is electrically connected to the rear-mounted recognition camera. The post-processing unit is provided with a finished product receiving box with an open top at the rear end, and the finished product receiving box is fixed between the two conveying support frames.

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