Paint spraying hanger for automobile plate and paint spraying method

Abstract

The invention belongs to the technical field of automobile paint spraying equipment, and provides a paint spraying hanger for automobile plates and a paint spraying method.The paint spraying hanger comprises a case, a hanger structure, a driving unit and a vacuum pump; the hanger structure comprises a rotating assembly and a plurality of adsorption assemblies. The rotating assembly is rotationally mounted on the case; the driving unit is mounted on the surface of the case and is in transmission connection with the hanger structure; the multiple adsorption assemblies are connected with the rotating assembly and have the freedom degree in the vertical direction. The vacuum pump is installed in the machine box and detachably connected with the adsorption assembly through an air pipe. The paint spraying hanger comprises the adsorption assembly and the rotating assembly, the adsorption assembly fixes a to-be-painted piece through negative pressure, compared with traditional hanging, the adsorption assembly is firmer, shaking and deviation of a plate caused by airflow are prevented, uniform spraying is guaranteed, and the effect consistency and the percent of pass are improved; the rotating assembly drives the part to rotate flexibly, direction adjustment is convenient, the operation intensity of workers is reduced, manual angle adjustment deviation is avoided, and the spraying quality is guaranteed.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of automobile paint spraying equipment, and particularly relates to a paint spraying hanger for automobile panel and a paint spraying method. BACKGROUND

[0002] In the field of automobile manufacturing, the surface spraying process of automobile panel (including core components such as plastic panel and metal sheet) is a key link to ensure the appearance quality, weather resistance and service life of the components. In this process, the hanger, as a core auxiliary tool, bears the function of suspending and supporting various panels, providing a basic condition for subsequent manual spraying operation.

[0003] However, the traditional hanger widely used in the current industry has exposed many problems to be solved in the actual operation process, which seriously affects the spraying efficiency and quality, and increases the working difficulty of the operators. On the one hand, the suspension mode of the traditional hanger for the panel can only realize basic bearing, and lacks stable and reliable positioning and clamping structure. This leads to insufficient firmness of the plastic panel or sheet metal in the suspended state, and when the paint gun sprays paint at high pressure, the airflow impact can easily cause the panel to shake and deviate. This unstable state can directly damage the uniformity of the spraying trajectory, causing uneven paint film thickness, local spraying omission or over-spraying, etc., which greatly reduces the consistency and pass rate of the spraying effect.

[0004] On the other hand, the existing hanger generally does not have an automatic rotation function, which is a design defect that significantly restricts the spraying operation. Since the panel cannot rotate synchronously with the hanger, the operator needs to constantly adjust the position and spraying angle around the fixed panel to complete the full-surface spraying of the components. This not only increases the operation strength and labor of the workers, but also may cause insufficient spraying in some areas due to the deviation of the manual angle adjustment, further affecting the spraying quality of the product.

[0005] In addition, even if the panel rotation is achieved by manual assistance in some scenarios, the traditional hanger does not have an appropriate synchronous clamping and fixing mechanism. In the process of panel rotation, the lack of stable constraint can easily cause the panel to shake and deviate, and even there is a risk of panel falling due to centrifugal force or improper operation. This not only causes damage to the components, increases production costs, but also threatens the safety of the operators on site, and seriously affects the continuity and efficiency of the spraying operation, which is difficult to meet the production needs of high efficiency, high quality and safety in the modern automobile manufacturing process. SUMMARY

[0006] In view of the problems in the background art, the present application provides a paint spraying hanger for automobile panel and a paint spraying method.

[0007] To achieve the above purpose, the present application adopts the following technical solutions: This invention provides a paint spraying bracket for automotive panels, characterized in that it includes a housing, a bracket structure, a drive unit, and a vacuum pump; The mounting structure includes a rotating assembly and several adsorption assemblies; the rotating assembly is rotatably mounted on the chassis. The drive unit is mounted on the surface of the chassis and is connected to the bracket structure for driving the bracket structure to rotate in the horizontal plane; Several adsorption components are connected to a rotating component, and have a degree of freedom in the vertical direction; The vacuum pump is installed inside the chassis and is detachably connected to the adsorption assembly via a gas pipe.

[0008] Furthermore, the rotating assembly includes a vertical rod and a rotating frame; One end of the vertical rod is rotatably mounted on the top of the chassis, and the other end is welded to the rotating frame; The surface of the rotating frame has several limiting grooves, which are distributed in a circumferential array along the rotation center of the rotating frame; the limiting grooves are used to install the adsorption components.

[0009] Furthermore, the rotating frame is in the shape of a cross, a line, a rice grain, or a disc.

[0010] Furthermore, the adsorption assembly includes a screw, a locking nut, and a vacuum suction cup; The screw is placed in the limiting groove in the vertical direction; There are two locking sleeves, which cooperate with the screw rod to lock the screw rod from above and below the rotating frame; The vacuum suction cup is detachably connected to the vacuum pump via an air tube.

[0011] Furthermore, the vacuum pump is also equipped with a solenoid valve; The outlet end of the solenoid valve is connected to the vacuum pump via an air pipe, and the inlet end is detachably connected to the vacuum suction cup via an air pipe.

[0012] Furthermore, the solenoid valve is mounted on the surface of the chassis.

[0013] Furthermore, the drive unit includes a motor, a first bevel gear, a rotating shaft, and a second bevel gear; The motor is mounted on the upper surface of the chassis, and a shaft is installed at the output end of the motor; the first bevel gear is installed at the end of the shaft; the second bevel gear is installed on the surface of the vertical rod and meshes with the first bevel gear.

[0014] Furthermore, a controller is mounted on the surface of the chassis, which is electrically connected to both the motor and the vacuum pump.

[0015] Furthermore, several casters are installed at the bottom of the chassis.

[0016] The present invention also provides a painting method for the above-mentioned painting hanger for automotive panels, comprising the following steps: The surface of the part to be painted is adsorbed by the adsorption assembly and the surface of the part to be painted is self-adapted to the adsorption assembly. The orientation of the part to be painted is adjusted by driving the adsorption assembly to rotate along the circumference through the driving unit. The part to be painted is painted by using the spray gun.

[0017] The beneficial effects of the present application are as follows: 1. The paint spraying hanger of the present application comprises an adsorption assembly and a rotating assembly. The adsorption assembly fixes the part to be painted by the negative pressure adsorption principle. Compared with the traditional hanger which only relies on the suspension bearing mode, the installation firmness of the part to be painted can be greatly improved, the problems of board shaking and deviation caused by the high-pressure airflow impact of the paint spraying gun can be effectively avoided, the uniformity of the spraying track can be ensured, the uneven paint film thickness, the missing spraying and the over-spraying phenomena can be reduced, and the consistency of the spraying effect and the product qualification rate can be improved. At the same time, the rotating assembly can drive the part to be painted to rotate flexibly, the orientation of the board can be conveniently adjusted, the operator does not need to frequently adjust the position and the spraying angle around the fixed board, and the overall spraying of each surface of the part can be completed, which not only reduces the operation strength and the labor amount of the worker, but also reduces the problem of insufficient local spraying caused by the deviation of the manual angle adjustment, and further ensures the spraying quality.

[0018] 2. The adsorption assembly of the present application is provided with a rotating frame, a screw rod and a vacuum suction cup. When the part to be painted is fixed, the screw rod can realize the up-down position adjustment along the vertical direction, so that the vacuum suction cup can self-adaptively adjust the height according to the height size of the board and tightly abut against the surface of the part to be painted. At the same time, the screw rod can realize the flexible adjustment of the horizontal coordinates on the rotating frame, so as to drive the vacuum suction cup to accurately adjust the transverse and longitudinal positions in the horizontal plane, and ensure that the vacuum suction cup can accurately correspond to and stably abut against the optimal adsorption position (such as the area with high structural strength and smooth surface) of the part to be painted. This multi-dimensional adjustment design solves the problem that the fixed position of the traditional hanger is single and difficult to adapt to diversified boards, not only simplifies the hanging process when different boards are switched, improves the operation efficiency, but also ensures the effective abutment of the vacuum suction cup and the board, further enhances the stability of the negative pressure adsorption, and provides a more reliable guarantee for the stability of the board in the subsequent rotary spraying process.

[0019] Other features and advantages of the present application will be set forth in the following description, and in part will become apparent to those skilled in the art from the description, or can be learned by practice of the present application. The objects and other advantages of the present application can be realized and attained by the structure particularly pointed out in the description and the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings described below are only some embodiments of the present application, and the ordinary skilled in the art can obtain other drawings according to these drawings without any creative effort.

[0021] Figure 1 The structural diagram of the paint spraying hanger for automobile panel parts of the present application is shown; Figure 2 The assembly diagram of the paint spraying hanger for automobile panel parts of the present application is shown; Figure 3 The structural diagram of the rotating frame of the present application is shown; Figure 4 The structural diagram of the screw rod, screw sleeve and vacuum chuck of the present application is shown.

[0022] In the figure: 1, case; 2, hanger structure; 201, vertical rod; 202, electromagnetic valve; 203, rotating frame; 204, limiting groove; 205, screw rod; 206, locking screw sleeve; 207, vacuum chuck; 3, controller; 4, universal wheel; 5, driving unit; 501, motor; 502, first bevel gear; 503, rotating shaft; 504, second bevel gear; 6, vacuum pump. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application will be clearly and completely described below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only some embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by the ordinary skilled in the art without any creative effort are within the protection scope of the present application.

[0024] As shown in Figure 1 , it is a paint spraying hanger for automobile panel parts, which comprises a case 1, a hanger structure 2, a driving unit 5 and a vacuum pump 6. The hanger structure 2 comprises a rotating assembly and a plurality of adsorption assemblies; the rotating assembly is rotatably installed on the case 1; the driving unit 5 is installed on the surface of the case 1 and is in transmission connection with the hanger structure 2, for driving the hanger structure 2 to rotate in the horizontal plane; the plurality of adsorption assemblies are connected with the rotating assembly 1 and have the freedom in the vertical direction; the vacuum pump 6 is installed inside the case 1 and is detachably connected with the adsorption assemblies through air pipes. The above-mentioned paint spraying hanger can be used for the paint spraying operation of plastic parts such as door interior panel and instrument panel shell, and can also be used for the paint spraying operation of automobile body sheet metal.

[0025] As shown in Figure 2As shown, the chassis 1 is the basis of the rack bearing structure, the overall rectangular, made of high-strength steel, to provide a stable installation base for each functional component. In the chassis 1 bottom, evenly distributed installation of several universal wheels 4, in this embodiment, preferably 4 universal wheels 4, respectively with the chassis 1 bottom four corners through bolt fixed connection, universal wheel 4 with 360 degree steering function, can drive the whole rack flexible movement, easily adapt to different operating position in the paint shop needs.

[0026] At the same time, the front of the chassis 1 is provided with a controller 3, which is fixed on the front end of the chassis 1 by screws for easy operation. The controller 3 is internally integrated with a control circuit and is electrically connected to the drive unit 5 and the vacuum pump 6 through wires. The controller 3 can centrally control the running state of the drive unit 5, the start and stop of the vacuum pump 6, and the power, thereby realizing automatic operation of the rack.

[0027] Further, the drive unit 5, as the power source of the rack, is installed on the upper surface of the chassis 1. The drive unit 5 comprises a motor 501, a first bevel gear 502, a rotating shaft 503, and a second bevel gear 504. The motor 501 is vertically fixed on the upper surface of the chassis 1 by bolts. The output end of the motor 501 is connected to one end of the rotating shaft 503 through a shaft coupling in the horizontal direction. The other end of the rotating shaft 503 is fixed (or welded) to the first bevel gear 502 through a key connection, ensuring that the first bevel gear 502 can rotate synchronously when the motor 501 operates.

[0028] In addition, the rotating assembly cooperating with the drive unit 5 is the core part of the rack structure 2. The rack structure 2 comprises a vertical rod 201 and a rotating frame 203. The vertical rod 201 is cylindrical and is rotatably installed at the center of the top of the chassis 1 through a deep groove ball bearing. The outer ring of the bearing is interference fit with the pre-installed mounting hole on the top of the chassis 1, and the inner ring is tightly attached to the surface of the vertical rod 201, allowing the vertical rod 201 to rotate freely in the horizontal plane around its own axis. The other end of the vertical rod 201 is fixedly connected to the rotating frame 203 by welding. In this embodiment, the rotating frame 203 adopts a "cross" structure, and the welding is performed by double-sided welding to ensure the connection strength and avoid shaking during rotation. Figure 3

[0029] To realize power transmission, the second bevel gear 504 is fixedly installed on the surface of the vertical rod 201 near the top of the chassis 1 through a key connection. The tooth surface of the second bevel gear 504 is fully engaged with the tooth surface of the first bevel gear 502 in the drive unit 5, ensuring that when the motor 501 drives the first bevel gear 502 to rotate through the rotating shaft 503, the second bevel gear 504 and the vertical rod 201 can be driven to rotate synchronously through the engagement, and further driving the rotating frame 203 to rotate in the horizontal plane along the circumference.

[0030] ​The adsorption assembly in the hanger structure 2 is used for fixing the plastic parts to be painted, and the number is adapted according to the structure of the rotating frame 203, Figure 3 In the embodiment of the "cross" rotating frame 203, a set of adsorption assemblies is installed on each of the four extension arms, and each set of adsorption assemblies is composed of a screw rod 205, a locking nut 206 and a vacuum chuck 207.

[0031] A limiting groove 204 is formed on the surface of each extension arm of the rotating frame 203, and all the limiting grooves 204 are distributed in a circumferential array around the center of rotation of the rotating frame 203. The length direction of the limiting groove 204 is consistent with the length direction of the extension arm of the rotating frame 203, thereby providing a horizontal adjustment space for the adsorption assembly. The screw rod 205 in the adsorption assembly is vertically penetrated into the limiting groove 204, and the outer diameter of the screw rod 205 is slightly smaller than the width of the limiting groove 204, so that the screw rod 205 can slide in the horizontal direction in the limiting groove 204. At the same time, two locking nuts 206 are cooperatively arranged on the screw rod 205, which are located above and below the rotating frame 203 respectively, and are connected with the screw rod 205 through threads. When the two locking nuts 206 are tightened, the screw rod 205 can be fixed firmly at a specified position of the limiting groove 204, and when they are loosened, the horizontal position of the screw rod 205 can be adjusted to adapt to the fixing requirements of plastic parts of different sizes.

[0032] The top of the screw rod 205 is connected with the vacuum chuck 207, and the screw rod 205 has a vertical degree of freedom, so that by adjusting its up-down position in the limiting groove 204 (fixed by the locking nut 206), the vacuum chuck 207 can be moved up and down, so that the vacuum chuck 207 can be self-adapted to the surface of the plastic part with different thicknesses and slightly curved surface, thereby improving the adsorption stability.

[0033] In addition, Figure 1 Part of the gas path system is also shown in the embodiment, which is used for providing negative pressure adsorption power for the adsorption assembly, and the main components include a vacuum pump 6 and an electromagnetic valve 202. The vacuum pump 6 is installed inside the cabinet 1 and fixed on the bottom plate of the cabinet 1 by bolts, and the side of the cabinet 1 is provided with a heat dissipation hole to ensure the heat dissipation requirement when the vacuum pump 6 works. The electromagnetic valve 202 is installed on the side of the cabinet 1.

[0034] In terms of gas connection, the inlet end of the electromagnetic valve 202 is detachably connected with the vacuum chuck 207 in each adsorption assembly through a gas pipe (not shown in the figure); and the outlet end of the electromagnetic valve 202 is connected with the gas inlet of the vacuum pump 6 through a gas pipe, thereby forming a complete gas path channel. At the same time, the electromagnetic valve 202 is electrically connected with the controller 3 through wires, and the controller 3 controls the on-off state of the electromagnetic valve 202, thereby realizing precise control of the adsorption and release actions of the vacuum chuck 207.

[0035] For example, the working principle of the paint spraying hanger is as follows: When it is necessary to fix the new energy automobile plastic part to be painted, taking the car door interior panel as an example, first, according to the size and shape of the interior panel, the position of the adsorption assembly is adjusted: loosen the locking nut 206 on the rotating frame 203, slide the four screw rods 205 to the corresponding positions of the four corners of the interior panel respectively, and then tighten the locking nut 206 to complete the horizontal position fixing; since the screw rod 205 has a degree of freedom in the vertical direction, the length of the screw rod 205 extending out of the rotating frame 203 can be adjusted up and down according to the thickness of the interior panel, so that the vacuum chuck 207 can be self-adapted to the surface of the interior panel.

[0036] By starting the vacuum pump 6 and the electromagnetic valve 202 through the controller 3, after the electromagnetic valve 202 is opened, the air in the vacuum chuck 207 is extracted by the vacuum pump 6 through the air pipe, forming negative pressure, so that the car door interior panel is firmly adsorbed on the vacuum chuck 207. The whole adsorption process does not need to punch holes on the surface of the plastic part or use clamps to clamp, which avoids damage to the surface of the plastic part, and at the same time, the negative pressure adsorption mode can adapt to the curved surface structure of the plastic part, has strong fixing stability, and solves the problem that the traditional clamping mode is easy to cause the deformation of the plastic part and leave clamping marks after painting.

[0037] During the painting process, in order to ensure that each surface of the plastic part can be uniformly painted, it is necessary to adjust the orientation of the part to be painted. By starting the motor 501 through the controller 3, the motor 501 outputs power to drive the rotating shaft 503 to rotate, and the first bevel gear 502 at the end of the rotating shaft 503 rotates accordingly. Since the first bevel gear 502 is meshed with the second bevel gear 504 on the vertical rod 201, the power is transmitted to the vertical rod 201 through the bevel gear transmission, so that the vertical rod 201 drives the rotating frame 203 to rotate in the horizontal plane.

[0038] The rotating speed adjusting knob on the controller 3 can control the rotating speed of the motor 501, and then adjust the rotating speed of the rotating frame 203. According to the painting requirements, the rotating frame 203 can be selected to rotate at a constant speed or intermittently, such as stopping for 5 seconds every 45° rotation. When the rotating frame 203 rotates, the car door interior panel adsorbed on the vacuum chuck 207 adjusts the orientation along the circumference, so that the painting personnel do not need to move around the plastic part, and can perform painting operation on different surfaces. This not only reduces the labor intensity of the painting personnel, but also effectively avoids the problem of uneven painting thickness caused by personnel movement, greatly improves the painting efficiency and quality.

[0039] The electromagnetic valve 202 plays a key on-off control role in the gas circuit system. When the painting operation is completed, the vacuum pump 6 is closed through the controller 3, and at the same time, the electromagnetic valve 202 is controlled to disconnect the gas circuit. The external air enters the vacuum chuck 207 through the pressure relief channel of the electromagnetic valve 202, so that the negative pressure in the chuck disappears, and the plastic part after painting can be easily taken down, which is convenient and efficient.

[0040] In addition, the controller 3 has an overload protection function. When the motor 501 is overloaded, such as the weight of the plastic part exceeding the designed load or the pressure of the vacuum pump 6 is abnormal, the controller 3 will automatically cut off the power supply to avoid damage to the parts and improve the safety and reliability during the use of the hanger.

[0041] The following is an example of painting a car door trim panel. The specific steps of painting the car door trim panel on the hanging rack are as follows: Figure 1 Step one: The adsorption assembly is self-adaptive to the surface of the part to be painted and adsorbs the part to be painted.

[0042] The car door trim panel to be painted is carried to the lower part of the hanging rack. According to the size of the trim panel, the horizontal position and vertical height of the four adsorption assemblies are adjusted according to the method described above, so that each vacuum chuck 207 can be self-adaptive to the flat area of the trim panel surface (avoiding adsorption on the protruding or hollow parts). Press the adsorption start button on the controller 3, and the vacuum pump 6 and the electromagnetic valve 202 are started synchronously. Within 10 seconds, the vacuum chuck 207 can complete the stable adsorption of the trim panel. At this time, the trim panel is gently pushed by hand and there is no obvious shaking, indicating that the fixing is complete.

[0043] Step two: Adjust the orientation of the part to be painted by driving the adsorption assembly to rotate circumferentially by the driving unit 5.

[0044] According to the painting sequence (usually the inside is painted first and then the outside), set the rotation speed of the rotating frame 203 to 5 revolutions per minute by the rotation speed adjustment knob of the controller 3, and press the rotation start button. The motor 501 drives the rotating frame 203 to rotate slowly. When the inside of the trim panel faces the painter, press the pause button to stop the rotating frame 203 from rotating, and the orientation adjustment is completed. If the painting surface needs to be switched, just start the rotation function again. The entire adjustment process does not require manual handling of the plastic parts, and the operation is flexible and efficient.

[0045] Step three: Use a spray gun to paint the part to be painted.

[0046] The painter holds the spray gun and stands at a distance of 30-50 cm from the trim panel, and paints evenly from left to right and from top to bottom. During the painting process, if it is found that some local areas of the trim panel are difficult to paint, the angle of the rotating frame 203 can be adjusted (such as rotating 15°) to make the area face the spray gun. For the corner parts of the trim panel, the rotating frame 203 can be started to rotate at low speed, and the spray gun can be moved at a constant speed to ensure uniform painting of the corner parts.

[0047] ​After the painting is completed, the spray gun is turned off, the rotation function and the adsorption function are turned off through the controller (3), and after the vacuum chuck 207 is depressurized, the painted interior trim panel is removed and transferred to the drying area. During the entire painting process, due to the stable fixation and flexible rotation of the hanger, the interior trim panel painting thickness deviation is controlled within ±0.05mm, the paint surface is smooth without sagging, and the painting efficiency is improved by about 40% compared with the traditional hanger.

[0048] In addition to the above-mentioned embodiment of the "cross" shaped rotating frame 203, the hanger can also select a "one" shaped, "rice" shaped or disc-shaped rotating frame 203 according to the size and quantity of the plastic parts to be painted: when painting small plastic parts such as center console button panels, a "one" shaped rotating frame 203 can be selected, with 2 adsorption assemblies installed on each side to realize simultaneous painting of multiple parts; when painting large plastic parts such as body side trim panels, a "rice" shaped rotating frame 203 can be selected to enhance the fixation stability through 6-8 adsorption assemblies; the disc-shaped rotating frame 203 is suitable for batch painting of small standardized plastic parts, and multiple adsorption assemblies can be uniformly arranged on its surface to realize assembly line painting operation in cooperation with the continuous rotation function.

[0049] Regardless of the type of rotating frame 203 selected, the core working principle and painting method of the hanger remain the same, and through the flexible adjustment of the adsorption assembly, the stable transmission of the driving unit 5 and the centralized control of the controller 3, the painting needs of different new energy vehicle plastic parts can be met, and the hanger has wide applicability and practicality.

[0050] Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that the technical solutions recorded in the foregoing embodiments can still be modified, or some technical features can be replaced by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A paint hanger for automotive panels, characterized in that: The machine case (1), the hanger structure (2), the driving unit (5) and the vacuum pump (6) are included. The hanger structure (2) includes a rotating assembly and a plurality of adsorption assemblies; the rotating assembly is rotatably installed on the machine case (1); The driving unit (5) is installed on the surface of the machine case (1) and is in transmission connection with the hanger structure (2) for driving the hanger structure (2) to rotate in the horizontal plane; The plurality of adsorption assemblies are connected with the rotating assembly (1) and have the freedom in the vertical direction; The vacuum pump (6) is installed in the machine case (1) and is detachably connected with the adsorption assemblies through air pipes.

2. A paint hanger for automotive panels as claimed in claim 1, wherein, The rotating assembly includes a vertical rod (201) and a rotating frame (203); One end of the vertical rod (201) is rotatably installed on the top of the machine case (1), and the other end is welded with the rotating frame (203); A plurality of limiting grooves (204) are formed on the surface of the rotating frame (203) and are arranged in the circumferential direction of the rotating center of the rotating frame (203); the limiting grooves (204) are used for installing the adsorption assemblies.

3. A paint hanger for automotive panels as defined in claim 2, wherein, The rotating frame (203) is in the shape of a cross, a vertical line, a Chinese character "mi" or a disc.

4. A paint hanger for automotive panels as defined in claim 2, wherein, The adsorption assembly includes a screw rod (205), a locking sleeve (206) and a vacuum chuck (207); The screw rod (205) is arranged in the limiting groove (204) in the vertical direction; The locking sleeve (206) is provided with two locking sleeves matched with the screw rod (205) for locking the screw rod (205) from above and below the rotating frame (203); The vacuum chuck (207) is detachably connected with the vacuum pump (6) through an air pipe.

5. A paint hanger for automotive panels as defined in claim 4, wherein, The vacuum pump (6) is further provided with a solenoid valve (202); The outlet end of the solenoid valve (202) is connected with the vacuum pump (6) through an air pipe, and the inlet end is detachably connected with the vacuum chuck (207) through an air pipe.

6. A paint hanger for automotive panels as defined in claim 5, wherein, The solenoid valve (202) is installed on the surface of the machine case (1).

7. A paint hanger for automotive panels as defined in claim 2, wherein, The driving unit (5) includes a motor (501), a first bevel gear (502), a rotating shaft (503) and a second bevel gear (504); The motor (501) is installed on the upper surface of the machine case (1), and the output end of the motor (501) is provided with the rotating shaft (503); the first bevel gear (502) is installed on the end of the rotating shaft (503); and the second bevel gear (504) is installed on the surface of the vertical rod (201) and is in meshing connection with the first bevel gear (502).

8. A paint hanger for automotive panels according to claim 7, characterized in that, A controller (3) is installed on the surface of the machine case (1), and the controller (3) is electrically connected with the motor (501) and the vacuum pump (6).

9. A paint hanger for automotive panels according to any one of claims 1 to 7, characterized in that, A plurality of universal wheels (4) are further installed on the bottom of the machine case (1).

10. A painting method for the painting hanger for automotive panels according to any one of claims 1-9, characterized in that, The following steps are included: The adsorption assembly is adapted to the surface of the to-be-painted part and is adsorbed to the to-be-painted part; The driving unit (5) drives the adsorption assembly to rotate in the circumferential direction to adjust the orientation of the to-be-painted part; The to-be-painted part is painted by using a spray gun.

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