A bumper painting hanger and method of use

Abstract

The present application belongs to the technical field of coating hanger, and discloses a bumper coating hanger and a using method, which comprises a hanger, a pry body and a hook assembly. The main structure of the hanger is a cuboid frame structure. The bottom of the hanger is fixedly connected to the top of the pry body. The pry body is a rectangular frame structure with a vertically upward protrusion in the middle, comprising an AGV positioning pin hole, a skid code body support and an AGV code body receiving plate. The hook assembly is fixedly connected to different positions of the hanger for hanging different types of bumpers. The hanger structure saves the manufacturing cost and time of the primer hanger and the finish hanger, improves the versatility of the hanger, and is suitable for hanging bumpers of different vehicle models. The pry body of the hanger is flexibly connected with the AGV. The two-dimensional code provided on the skid code body installed on the skid code body support and the AGV code body receiving plate realizes the automatic transfer of the hanger by the AGV and automatically loads the hanger, reduces the transfer risk, improves the work efficiency, and saves the labor cost.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of coating hangers, in particular, relates to a bumper coating hanger and a use method. BACKGROUND

[0002] In recent years, with the gradual improvement of the requirements of commercial vehicle users on quality, modeling, and aesthetics, the bumper, as a key safety device for absorbing and mitigating impact force and protecting the vehicle body, has also begun to diversify. However, after the bumper assembly of the commercial vehicle is completed, special tools need to be used for in-plant transfer, and the specific process is as follows:

[0003] (1) The white bumper transfer process is as follows: the white bumper is pulled to the coating electrophoresis line by a logistics tool, the white bumper is manually disassembled and hung on the bumper primer hanger, and the primer hanger is transferred to the primer skid using a forklift or a crane, and the bumper is electrophoresed.

[0004] (2) The transfer process after the bumper is electrophoresed is as follows: the painted bumper is manually disassembled and hung on the bumper topcoat hanger, and the topcoat hanger is pulled to the coating topcoat line by a logistics vehicle, and the topcoat hanger is transferred to the topcoat skid using a forklift or a crane, and the bumper is topcoat sprayed.

[0005] The bumper transfer and hanging process has the following disadvantages: large quality, large volume, difficult transfer, and difficult personnel operation.

[0006] (1) The bumper hanger has a large amount of logistics and low automation rate during the transfer process.

[0007] (2) During the docking process of the bumper hanger and the skid system, there are problems of forklift transfer danger and large amount of personnel operation.

[0008] Automated Guided Vehicle (AGV) is also called automated guided vehicle or automated guided vehicle. AGV is widely used in AGV automobile enterprises. If AGV is used to replace the existing logistics vehicle, forklift, crane, etc. to transfer and dock the bumper hanger with the skid system, the problems of large quality, large volume, difficult transfer, difficult personnel operation, and transfer danger of the coating hanger after the bumper is hung can be solved. However, the structure of the existing coating hanger cannot be flexibly docked with AGV, the primer and topcoat hangers are quite different, different hangers are needed for transfer, and the hanger cannot be applied to different types of bumpers, which has low universality and high manufacturing cost. SUMMARY

[0009] The bumper coating hanger and the use method have the advantages that the middle part of the pry body of the hanger is provided with a rectangular upper convex frame structure matched with the shape of the AGV transfer support frame, and the AGV positioning pin hole is arranged on the longitudinal butt joint square tube of the hanger and matched with the positioning pin on the AGV transfer support frame, so that the flexible butt joint of the hanger and the AGV transfer support frame is realized, the AGV can safely and stably lift the hanger to advance, the transfer risk is reduced, and the labor cost is saved; the design of the pry body and the hanger main body of the hanger can reduce the production cost of the hanger, the primer hanger appropriately adjusts the fixing angle of the pry body and the hanger main body, adds the trapezoidal support beam and the auxiliary support beam, cooperates with the hook assembly of different specifications and fixes the hook assembly on different positions to complete the finish hanger, reduces the production cost of the hanger, the different specifications of the hooks fixed and installed on different positions of the finish hanger can make the bumpers of different vehicle types be hung on the same finish hanger, and the universality of the hanger is improved; the skid load body support and the AGV load body receiving plate of the hanger realize the automatic recognition of the AGV to the primer hanger and the finish hanger, the automatic planning of the loading route and the automatic butt joint with the skid system, realize the automatic transfer, cancel the process of the logistics vehicle transportation, reduce the logistics quantity and the workload of personnel, and improve the production efficiency.

[0010] The specific scheme content is as follows:

[0011] The bumper coating hanger comprises a hanger, a pry body and a hook assembly, the main body structure of the hanger is a rectangular frame structure, the bottom of the hanger is fixedly connected to the top of the pry body, the pry body is a rectangular frame structure vertically upwardly protruding in the middle part, comprises an AGV positioning pin hole, a skid load body support and an AGV load body receiving plate, and the hook assembly is fixedly connected to different positions of the hanger for hanging different types of bumpers.

[0012] The bumper is hung in different positions on the primer hanger and the topcoat hanger due to different operations of primer coating and topcoat coating, the existing primer hanger and topcoat hanger have different structures, and need to be separately made to meet the coating requirements, the hanger cost is high, and time, labor and effort are wasted. The main body structure of the bumper coating hanger is a cuboid frame structure, the bottom of the main body structure is welded and / or bolted to the top of the pry body, the hook assembly includes multiple groups of hooks with different sizes, shapes and installation positions, the pry body is provided with a skid load body support and an AGV load body receiving plate, and the basic structure of the hanger is formed. Four groups of EMS hanging point assemblies are additionally installed on the primer hanger pry body to serve as lifting hanging points for entering the primer coating line, the bumper is hung on the primer hanger through the symmetrically arranged reinforcing hooks on the top hanger / middle hanger and inserted into the corresponding hanging hole positions at the left and right ends of the bumper to realize horizontal hanging on the primer hanger; the skid load body is installed on the skid load body support of the pry body, the AGV load body receiving plate is provided with a two-dimensional code, the AGV identifies the primer hanger or the topcoat hanger through the two-dimensional code on the AGV load body receiving plate, and transports the primer hanger or the topcoat hanger to the feeding area of the primer coating line according to the set program, the skid system is connected through the skid load body to send the hanger into the electrophoresis tank, and the AGV completes the transportation of the primer hanger. The rectangular convex structure on the pry body of the hanger is matched with the transportation support frame lifted by the top of the AGV, and is connected through the limiting connection of the AGV positioning pin hole on the pry body and the positioning pin on the AGV transportation support frame, so that the flexible connection between the hanger and the AGV is realized, the stability of the hanger and the bumper during the transportation process is ensured, the degree of automation is high, the risk of using traditional logistics vehicles for transportation is avoided, the labor intensity is reduced, the labor cost is saved, and the production efficiency is improved. The topcoat hanger of the present application does not need to be redesigned, only the position and angle of the fixed connection between the hanger bottom and the pry body need to be adjusted according to the use condition, and the trapezoidal support beam and the auxiliary support beam are additionally installed on the hanger main body of the primer hanger, and hooks with different specifications are welded at different positions of the hanger, so that the hanging of bumpers of various vehicle models can be realized, the production cost and production cycle of the topcoat hanger are saved, and the versatility of the coating hanger is improved.

[0013] Further, the pry body comprises two longitudinal beam square tubes, two longitudinal butt square tubes, two U-shaped steel plates, two cross beam square tubes and an AGV positioning cross beam square tube, the two U-shaped steel plates are respectively fixed vertically on left and right ends of the two longitudinal beam square tubes, two ends of each U-shaped steel plate are respectively fixed and connected to upper end faces on the same side of the two longitudinal beam square tubes, and the top of the U-shaped steel plate protrudes from the upper end face of the longitudinal beam square tube, the two cross beam square tubes are arranged in parallel and spaced apart between the two U-shaped steel plates, each cross beam square tube is in a door frame structure, and the two lower ends thereof are symmetrically welded to the corresponding upper end faces of the two longitudinal beam square tubes, and the top of the cross beam square tube protrudes from the upper end face of the longitudinal beam square tube, the two longitudinal butt square tubes are arranged in parallel and spaced apart between the two longitudinal beam square tubes, and each longitudinal butt square tube is vertically welded and fixed with the corresponding cross beam square tube, the AGV positioning cross beam is arranged in parallel between the cross beam square tubes, and the two ends thereof are respectively welded to the opposite inner side walls of the two longitudinal butt square tubes, the AGV code body bearing plate is fixedly connected to the AGV positioning cross beam, the two longitudinal butt square tubes are symmetrically provided with AGV positioning pin holes penetrating therethrough, and the skid code body support is fixedly connected to any U-shaped steel plate.

[0014] The pry body of the primer hanger and the finish hanger of the present application is a support point, the AGV enters below the skid body and is lifted for transfer, after being transferred to the coating line, the AGV falls to drop the hanger on the roller bed, the pry body system is docked, and subsequent conveying work is performed by the skid body, and the AGV returns. The pry body, that is, the support point, is suitable for a general roller bed structure in coating. The two longitudinal butt square tubes of the pry body are arranged in parallel and spaced apart between the two longitudinal beam square tubes, the two cross beam square tubes are arranged in parallel and spaced apart between the two U-shaped steel plates, the two longitudinal beam square tubes and the two longitudinal butt square tubes are vertically welded and fixed with the two U-shaped steel plates and the two cross beam square tubes to form a rectangular grid frame with a protruding central rectangular area, and the AGV positioning cross beam square tube is vertically welded between the two longitudinal butt square tubes and between the two cross beam square tubes for fixing the AGV code body bearing plate. The skid code body support is fixedly installed on the U-shaped steel plate below the AGV entering the pry body. The pry body composed of square tubes and hot-rolled steel plates can reduce the weight of the hanger.

[0015] Further, the pry body further comprises two wear-resistant steel plates, each wear-resistant steel plate is matched in shape and size with the lower end face of the longitudinal beam square tube, and the two ends of each wear-resistant steel plate are provided with upward bends.

[0016] The lower end face of each of the two longitudinal beam square tubes of the pry body is matched and welded with a wear-resistant steel plate, and the wear-resistant steel plate can enhance the wear resistance of the skid. The bend angle of the wear-resistant steel plate is 171.5°, which facilitates the docking of the pry body and the roller bed.

[0017] Further, the hanger includes a hanger body, the hanger body includes a horizontal hanger assembly and a column assembly, the horizontal hanger assembly includes a top layer hanger and a middle layer hanger, the top layer hanger and the middle layer hanger are both horizontal rectangular frames formed by four square tubes welded with each other, the column assembly includes four longitudinal square tubes, bottom ends of the four longitudinal square tubes are fixedly connected to a top end face of the pry body, and four fixed points sequentially connected form a rectangle, the top layer hanger is fixedly connected to a top end face of the four longitudinal square tubes in a horizontal matching mode, and the middle layer hanger is fixedly connected to a middle part of the four longitudinal square tubes in a matching mode and is parallel to the top layer hanger.

[0018] The hanger body of the present application is formed by fixing two horizontal hangers, i.e., a top layer hanger and a middle layer hanger, to top and middle parts of four vertical square tubes, and fixing a bottom part of the four square tubes to a top part of the pry body, which is the basic structure of the primer hanger of the present application. By changing the position and angle of the fixed connection between the bottom part of the hanger body and the top part of the pry body, and adding a trapezoidal support beam to the top layer hanger and an auxiliary support beam to the middle layer hanger, and fixing different hook assemblies to different positions of the hanger body, the structure of the finish hanger can be obtained, the versatility of the hanger is improved, the manufacturing cost and period of the hanger are saved, and labor is saved.

[0019] Further, the hanger further includes an auxiliary support, the auxiliary support includes two trapezoidal support beams and two auxiliary support beams, each trapezoidal support beam is formed by two short square tubes and a long square tube welded with each other into an isosceles trapezoidal frame without a lower bottom, the two trapezoidal support beams are symmetrically welded horizontally to left and right sides of the top layer hanger to form a horizontal polygonal frame, and the two auxiliary support beams are welded to the middle layer hanger below the corresponding trapezoidal support beam, each auxiliary support beam is formed by welding a middle part of an auxiliary support beam long square tube to top ends of two auxiliary support beam short square tubes arranged in parallel and spaced apart into a frame structure similar to Each auxiliary support beam is formed by welding the two short square tubes to outer side walls of the corresponding square tube of the middle layer hanger.

[0020] The two trapezoidal support beams and the two auxiliary support beams are fixedly connected to the corresponding horizontal hanger assembly in a symmetrical mode to form the structure of the hanger of the finish hanger, which saves time and labor and saves cost. The trapezoidal support beam and the auxiliary support beam mentioned in the present application are not the only shape, and the shape can be changed according to the needs of production.

[0021] Further, the hook assembly comprises two groups of reinforcing hook assemblies and two groups of first column hook assemblies, the two groups of reinforcing hook assemblies are respectively welded on the top layer of the hanger and the middle layer of the hanger, each group of reinforcing hook assemblies comprises a plurality of pairs of reinforcing hooks, each reinforcing hook comprises a reinforcing short pipe and two hooks, the two hooks are respectively symmetrically welded on the left and right side walls of the reinforcing short pipe, each pair of reinforcing hooks is respectively symmetrically welded on two parallel square tubes of the top layer of the hanger / middle layer of the hanger and the hook tips are upward, the two groups of first column hook assemblies are respectively welded on the longitudinal square tubes connected with the top layer of the hanger and the middle layer of the hanger, each group of first column hook assemblies comprises eight hooks, the eight hooks are respectively welded on the left and right side walls of the four longitudinal square tubes connected with the top layer of the hanger / middle layer of the hanger in pairs and the arrangement direction is consistent with that of the adjacent reinforcing hooks.

[0022] The hook assembly of the primer hanger comprises reinforcing hooks symmetrically arranged on the top layer of the hanger / middle layer of the hanger and hooks fixed on the corresponding columns of the top layer of the hanger / middle layer of the hanger, the bumpers for primer coating are arranged in a row in horizontal and interval, the AGV transports the primer hanger together with the bumpers to the electrophoresis tank, the primer hanger and the bumpers enter the electrophoresis tank together, so that the bumpers can be closely arranged in this way without affecting the coating effect.

[0023] Further, the pry body further comprises four groups of EMS hanging point assemblies, the four groups of EMS hanging point assemblies are fixedly connected to the upper end faces of the two longitudinal beam square tubes in pairs and are symmetrically arranged, each group of EMS hanging point assemblies comprises an EMS sling fixing hook, a fixed plate and a reinforcing plate, the lower end face of the fixed plate is welded and fixed to the upper end face of the longitudinal beam square tube and one end of the fixed plate extends out of the two longitudinal beam square tubes, the bottom of the EMS sling fixing hook is welded to the upper end face of the fixed plate extending out of the longitudinal beam square tube, and the reinforcing plate is vertically welded to the fixed plate.

[0024] The electric monorall system (EMS) is a kind of suspended conveyor system for conveying materials in a factory, the four groups of EMS hanging point assemblies arranged on the pry body are used for automatic fixing with the EMS sling during the pretreatment of primer coating and the feeding before electrophoresis, and the EMS sling covers the primer hanger and all the bumpers hung thereon to perform the pretreatment and electrophoresis process.

[0025] Further, the hook assembly includes a top layer hook assembly, two groups of second column hook assemblies, and an auxiliary beam hook assembly. The top layer hook assembly includes a plurality of hooks. Two hooks are evenly spaced and welded on the outer side wall of each square tube of the two trapezoidal support beams of the top layer hanger, and each hook tip is upward. The auxiliary beam hook assembly includes a plurality of L-shaped hooks. Each end of the rectangular tube of the auxiliary support beam is welded with an L-shaped hook, and the hook tip is upward. Two L-shaped hooks are also spaced and welded on the rectangular tube of each trapezoidal support beam, and the hook tip is upward. Each group of second column hook assemblies includes four hooks. The four hooks are welded on the side walls of the four longitudinal square tubes connected with the top layer hanger / middle layer hanger. Each hook faces outward from the longitudinal square tube, and the hook tip is upward.

[0026] The hook assembly of the topcoat hanger is different from that of the primer hanger. During topcoat painting, the bumpers cannot block each other to avoid affecting the painting effect. The hanger structure of the topcoat hanger is different from that of the primer hanger, and the shape and size of the hooks of the hook assembly are also different. The hooks are welded and fixed at corresponding positions according to actual production needs, which can realize the hanging of bumpers of various vehicle models and improve the versatility of the topcoat hanger. The types and fixed positions of the hook assembly mentioned in the application are only one of them, which can be adjusted according to needs in actual application.

[0027] Further, the pry body further includes four longitudinal beam sealing reinforcement plates. Each longitudinal beam sealing reinforcement plate is a rectangular plate matching the cross section of the two ends of each longitudinal beam square tube. The four longitudinal beam sealing reinforcement plates are matched and sealingly welded on the four ends of the two longitudinal beam square tubes.

[0028] Four rectangular reinforcement plates are sealingly welded on the two ends of the two longitudinal beam square tubes of the pry body. This not only increases the strength of the two longitudinal beam square tubes, but also prevents paint mist from entering the longitudinal beam square tubes during spraying to form paint slag, thereby affecting the operation of the skid on the roller bed.

[0029] A method for using the bumper coating hanger includes the following steps:

[0030] (1) The step of using the bumper coating hanger for primer coating is as follows:

[0031] S10, placing the bumper coating hanger on the hanger support platform. Each bumper to be coated includes two hanging hole positions. The two hanging hole positions of each bumper are manually threaded through a pair of reinforcing hooks symmetrically arranged on the two parallel square tubes of the top layer hanger / middle layer hanger. The hook tips of the reinforcing hooks are upward. After all the bumpers are hung, all the bumpers are horizontally and horizontally spaced between the two parallel square tubes of the top layer hanger / middle layer hanger.

[0032] S11, calling AGV through the calling system.

[0033] S12, the AGV enters the bottom of the bumper painting hanger support platform according to the set route, the AGV system scans the two-dimensional code on the AGV load body support plate of the bumper painting hanger, and identifies that the bumper painting hanger is a primer hanger;

[0034] S13, the upper part of the AGV 4 is provided with a transfer support frame, the support bracket and the longitudinal butt joint square tube are butt jointed, the middle part of the support bracket is provided with a positioning pin, the transfer support frame of the AGV is lifted to press against the longitudinal butt joint square tube of the bumper painting hanger, and the positioning pin is inserted into the AGV positioning pin hole from below to realize that the bumper painting hanger is limited and fixed on the top end surface of the transfer support frame of the AGV;

[0035] S14, the AGV lifts the bumper painting hanger to enter the upper part of the primer process area according to the set route, the load body installed on the skid load body support of the bumper painting hanger is butt jointed after being recognized by the skid system, the transfer support frame of the AGV is lowered, the positioning pin is separated from the AGV positioning pin hole, the bumper painting hanger is transferred from the transfer support frame of the AGV to enter the skid system, and the movement of the bumper painting hanger on the skid system is realized;

[0036] S15, the AGV returns to the parking area according to the set route and waits;

[0037] S16, the skid system forwards the bumper painting hanger to the upper part, the EMS hanging point assembly of the pry body is automatically connected with the EMS hanger, and the bumper painting hanger is covered by the EMS hanger to be pretreated and electrophoresed;

[0038] (2), the steps of using the bumper painting hanger to perform topcoat painting:

[0039] S20, the bumper painting hanger provided with the trapezoidal support beam and the auxiliary support beam is placed on the hanger support platform, the bumpers on which the primer coating has been completed are manually selected according to different shapes of the bumpers, suitable top layer hook assemblies, two groups of column hook assemblies and auxiliary beam hook assemblies are used for hanging, and the positions of the bumpers are ensured to be able to prevent the bumpers from affecting the topcoat painting of each other.

[0040] S21, the AGV is called through the calling system;

[0041] S22, the AGV enters the bumper coating hanger directly below according to the set route from the bottom of the hanger support platform where the bumper coating hanger is placed, the AGV system scans the two-dimensional code on the AGV load body receiving plate of the bumper coating hanger, and identifies that the bumper coating hanger is a topcoat hanger;

[0042] S23, the upper part of the AGV is provided with a transfer support frame, the support support and the longitudinal butt joint square tube on the transfer support frame are butt jointed, the middle part of the support support is provided with a positioning pin, the transfer support frame of the AGV is lifted to press against the longitudinal butt joint square tube of the bumper coating hanger, and the positioning pin of the support support is inserted into the AGV positioning pin hole from below to realize that the bumper coating hanger is limited and fixed on the top end surface of the transfer support frame of the AGV;

[0043] S24, the AGV lifts the bumper coating hanger to enter the upper part of the primer process area according to the set route, the load body installed on the skid load body support of the bumper coating hanger is butt jointed after being recognized by the skid system, the transfer support frame of the AGV is lowered, the positioning pin is separated from the AGV positioning pin hole, the bumper coating hanger is transferred from the transfer support frame of the AGV to enter the skid system, and the movement of the bumper coating hanger on the skid system is realized;

[0044] S25, the AGV returns to the parking area according to the set route and waits.

[0045] Compared with the prior art, the present application has the following beneficial effects:

[0046] 1. The upper convex structure in the middle of the pry body matches the shape of the AGV transfer support frame, and the cooperation of the AGV positioning pin hole on the longitudinal butt joint square tube of the hanger and the positioning pin on the AGV transfer support frame realizes the flexible butt joint of the hanger and the AGV transfer support frame, so that the AGV can safely and stably hold the hanger and move forward, reduces the transfer risk, and saves the labor cost;

[0047] 2. The pry body and the hanger main body of the hanger are fixedly connected as the main structure of the primer hanger, and this structure can reduce the production cost of the hanger, only by adjusting the position or angle of the fixed connection of the top of the pry body and the bottom of the hanger main body, adding the trapezoidal support beam and the auxiliary support beam, cooperating with different specifications of the hook assembly and fixing the hook assembly on different positions, the topcoat hanger can be obtained, and the production cost of the hanger is reduced;

[0048] 3. The different specifications of the hooks fixedly installed on different positions of the primer hanger and the topcoat hanger enable bumpers of different vehicle models to be hung on the same hanger, and the versatility of the hanger is improved;

[0049] 4. The two-dimensional code arranged on the AGV code carrier receiving plate of the present application enables the AGV to automatically identify the primer hanger and the finish hanger and select the loading route according to the set program, the skid code carrier installed on the skid code carrier support can realize automatic docking with the skid system for loading, realizing the automatic transfer of the coating hanger, reducing the material flow and the workload of personnel, and improving the production efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0050] Figure 1 The structure schematic diagram of the primer hanger of the embodiment 1 of the present application is shown in the figure.

[0051] Figure 2 The structure schematic diagram of the finish hanger of the embodiment 2 of the present application is shown in the figure.

[0052] Figure 3 The working schematic diagram of the AGV flexible docking primer hanger in the use method of the embodiment 3 of the present application is shown in the figure.

[0053] Figure 4 The top view of the AGV flexible docking primer hanger in the use method of the embodiment 3 of the present application is shown in the figure.

[0054] Figure 5 The working schematic diagram of the AGV flexible docking finish hanger in the use method of the embodiment 3 of the present application is shown in the figure.

[0055] Figure 6 The front view of the AGV flexible docking finish hanger in the use method of the embodiment 3 of the present application is shown in the figure.

[0056] In the figure:

[0057] 1. hanger; 1.1. hanger body; 1.11. horizontal hanger assembly; 1.111. top layer hanger; 1.112. middle layer hanger; 1.113. square tube; 1.12. vertical column assembly; 1.121. longitudinal square tube; 1.2. auxiliary support; 1.21. ladder support beam; 1.211. short square tube; 1.212. long square tube; 1.22. auxiliary support beam; 1.221. auxiliary support beam short square tube; 1.222. auxiliary support beam long square tube; 2. sled body; 2.1. AGV positioning pin hole; 2.2. sled load body support; 2.3. AGV load body receiving plate; 2.4. longitudinal beam square tube; 2.5. longitudinal butt square tube; 2.6. U-shaped steel plate; 2.7. cross beam square tube; 2.8. AGV positioning cross beam square tube; 2.9. wear-resistant steel plate; 2.10. EMS hanging point assembly; 2.11. EMS lifting tool fixing hook; 2.12. fixing plate; 2.13. reinforcing plate; 2.14. longitudinal beam sealing reinforcing plate; 3. hook assembly; 3.1. reinforcing hook assembly; 3.11 reinforcing hook; 3.111. reinforcing short tube; 3.112. hook; 3.2. first vertical column hook assembly; 3.3. top layer hook assembly; 3.4. second vertical column hook assembly; 3.5. auxiliary beam hook assembly; 3.51. L-shaped hook; 4. AGV; 4.1. transfer support frame; 4.2. positioning pin; 5. lifting tool support platform. DETAILED DESCRIPTION

[0058] In order to make the objects, technical solutions and advantages of the present application clearer, the following will further describe the present application with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present application, but not all the embodiments. Based on the embodiments of the present application, all the other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of the present application.

[0059] The terms used in the present application are only for the purpose of describing particular embodiments and are not intended to limit the present application. The singular forms "a", "said" and "the" used in the present application and the appended claims are also intended to include the plural forms, unless the context clearly indicates otherwise. "Plural" generally includes at least two.

[0060] It should be noted that the terms "front", "back", "inner", "outer", "left", "right" and the like used in the present application indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0061] It is particularly important to note that the symbols and numbers present in the description, if not marked in the description of the drawings, are not drawing references.

[0062] The embodiments of the bumper coating hanger and the use method provided by the present application are described in detail below with reference to the accompanying drawings. Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 and Figure 6 .

[0063] Embodiment 1:

[0064] As shown in Figure 1 , a bumper coating hanger includes a hanger 1, a pry body 2, and a hook assembly 3. The main structure of the hanger 1 is a rectangular frame structure. The bottom of the hanger 1 is fixedly connected to the top of the pry body 2. The pry body 2 is a rectangular frame structure with a vertically upward protruding middle part, including an AGV positioning pin hole 2.1, a skid load body support 2.2, and an AGV load body receiving plate 2.3. The hook assembly 3 is fixedly connected to different positions of the hanger 1 for mounting different models of bumpers.

[0065] The pry body 2 includes two longitudinal beam square tubes 2.4, two longitudinal butt square tubes 2.5, two U-shaped steel plates 2.6, two cross beam square tubes 2.7, and an AGV positioning cross beam square tube 2.8. The two U-shaped steel plates 2.6 are vertically fixed to the left and right ends of the two longitudinal beam square tubes 2.4. The two ends of each U-shaped steel plate 2.6 are fixedly connected to the upper end faces of the same side of the two longitudinal beam square tubes 2.4, and the top of the U-shaped steel plate 2.6 protrudes above the upper end face of the longitudinal beam square tube 2.4. The two cross beam square tubes 2.7 are arranged in parallel and spaced apart between the two U-shaped steel plates 2.6. Each cross beam square tube 2.7 has a door frame structure, and its two lower ends are symmetrically welded to the corresponding upper end faces of the two longitudinal beam square tubes 2.4, and the top of the cross beam square tube 2.7 protrudes above the upper end face of the longitudinal beam square tube 2.4. The two longitudinal butt square tubes 2.5 are arranged in parallel and spaced apart between the two longitudinal beam square tubes 2.4. Each longitudinal butt square tube 2.5 is vertically welded and fixed to the corresponding cross beam square tube 2.7. The AGV positioning cross beam is arranged in parallel between the cross beam square tubes 2.7, and its two ends are respectively welded to the opposite inner side walls of the two longitudinal butt square tubes 2.5. The AGV load body receiving plate 2.3 is fixedly connected to the AGV positioning cross beam. The two longitudinal butt square tubes 2.5 are symmetrically provided with through AGV positioning pin holes 2.1. The skid load body support 2.2 is fixedly connected to any U-shaped steel plate 2.6.

[0066] The pry body 2 further comprises two wear-resistant steel plates 2.9, each of which is matched in size and shape with the lower end face of the longitudinal beam square tube 2.4 and has two ends provided with upward bending, and the two wear-resistant steel plates 2.9 are respectively matched and welded to the lower end face of the corresponding longitudinal beam square tube 2.4.

[0067] The hanger 1 comprises a hanger body 1.1, the hanger body 1.1 comprising a horizontal hanger assembly 1.11 and a column assembly 1.12, the horizontal hanger assembly 1.11 comprising a top layer hanger 1.111 and a middle layer hanger 1.112, both of which are horizontal rectangular frames formed by four square tubes 1.113 welded to each other, and the column assembly 1.12 comprising four longitudinal square tubes 1.121, the bottom ends of the four longitudinal square tubes 1.121 being respectively fixedly connected to the top end face of the pry body 2 and the four fixed points sequentially connected to form a rectangle, the top layer hanger 1.111 being horizontally matched and fixedly connected to the top end face of the four longitudinal square tubes 1.121, and the middle layer hanger 1.112 being matched and fixedly connected to the middle part of the four longitudinal square tubes 1.121 and parallel to the top layer hanger 1.111.

[0068] The hook assembly 3 comprises two groups of reinforced hook assemblies 3.1 and two groups of first column hook assemblies 3.2, the two groups of reinforced hook assemblies 3.1 being respectively welded to the top layer hanger 1.111 and the middle layer hanger 1.112, each group of reinforced hook assemblies 3.1 comprising a plurality of pairs of reinforced hooks 3.11, each reinforced hook 3.11 comprising a reinforced short tube 3.111 and two hooks 3.112, the two hooks 3.112 being respectively symmetrically welded to the left and right side walls of the reinforced short tube 3.111, and each pair of reinforced hooks 3.11 being respectively symmetrically welded to the two parallel square tubes 1.113 of the top layer hanger 1.111 / middle layer hanger 1.112 and having hook tips upward, the two groups of first column hook assemblies 3.2 being respectively welded to the longitudinal square tubes 1.121 connected with the top layer hanger 1.111 and the middle layer hanger 1.112, each group of first column hook assemblies 3.2 comprising eight hooks 3.112, the eight hooks 3.112 being respectively welded to the left and right side walls of the four longitudinal square tubes 1.121 connected with the top layer hanger 1.111 / middle layer hanger 1.112 and arranged in the same direction as the adjacent reinforced hooks 3.11.

[0069] The pry body 2 further comprises four sets of EMS hanging point assemblies 2.10, which are evenly spaced and fixedly connected to the upper end faces of the two longitudinal beam square tubes 2.4 and symmetrically arranged in pairs. Each set of EMS hanging point assemblies 2.10 comprises a hook 2.11 for fixing an EMS spreader, a fixed plate 2.12, and a reinforcing plate 2.13. The lower end face of the fixed plate 2.12 is welded and fixed to the upper end face of the longitudinal beam square tube 2.4 and extends out of the two longitudinal beam square tubes 2.4 at one end. The bottom of the hook 2.11 for fixing the EMS spreader is welded to the upper end face of the fixed plate 2.12 extending out of the longitudinal beam square tube 2.4. The reinforcing plate 2.13 is vertically welded to the fixed plate 2.12.

[0070] The pry body 2 further comprises four longitudinal beam sealing reinforcing plates 2.14, each of which is a rectangular plate matching the cross section of the two ends of each longitudinal beam square tube 2.4. The four longitudinal beam sealing reinforcing plates 2.14 are respectively matched and sealingly welded to the four ends of the two longitudinal beam square tubes 2.4.

[0071] The structure of the spreader in this embodiment is the structure of a primer spreader.

[0072] Embodiment 2:

[0073] As shown in Figure 2 A bumper painting spreader, comprising a hanger 1, a pry body 2, and a hook assembly 3. The main structure of the hanger 1 is a cuboid frame structure. The bottom of the hanger 1 is fixedly connected to the top of the pry body 2. The pry body 2 is a rectangular frame structure with a vertically upward protruding middle part, comprising an AGV positioning pin hole 2.1, a skid code body support 2.2, and an AGV code body receiving plate 2.3. The hook assembly 3 is fixedly connected to different positions of the hanger 1 for mounting different models of bumpers.

[0074] The pry body 2 comprises two longitudinal beam square tubes 2.4, two longitudinal butt square tubes 2.5, two H-shaped steel plates 2.6, two transverse beam square tubes 2.7 and an AGV positioning transverse beam square tube 2.8, the two H-shaped steel plates 2.6 are respectively vertically fixed to the left and right ends of the two longitudinal beam square tubes 2.4, the two ends of each H-shaped steel plate 2.6 are respectively fixed and connected to the upper end faces of the longitudinal beam square tubes 2.4 on the same side, and the top of the H-shaped steel plate 2.6 protrudes from the upper end face of the longitudinal beam square tube 2.4, the two transverse beam square tubes 2.7 are arranged in parallel and spaced apart between the two H-shaped steel plates 2.6, each transverse beam square tube 2.7 has a door frame structure, and the two lower ends thereof are symmetrically welded to the corresponding upper end faces of the two longitudinal beam square tubes 2.4, and the top of the transverse beam square tube 2.7 protrudes from the upper end face of the longitudinal beam square tube 2.4, the two longitudinal butt square tubes 2.5 are arranged in parallel and spaced apart between the two longitudinal beam square tubes 2.4, and each longitudinal butt square tube 2.5 is vertically welded and fixed with the corresponding transverse beam square tube 2.7, the AGV positioning transverse beam is arranged in parallel between the transverse beam square tubes 2.7, and the two ends thereof are respectively welded to the opposite inner side walls of the two longitudinal butt square tubes 2.5, the AGV code body bearing plate 2.3 is fixedly connected to the AGV positioning transverse beam, and the AGV positioning pin holes 2.1 are symmetrically provided on the two longitudinal butt square tubes 2.5, the skid code body support 2.2 is fixedly connected to any H-shaped steel plate 2.6.

[0075] The pry body 2 further comprises two wear-resistant steel plates 2.9, each wear-resistant steel plate 2.9 is matched in shape and size with the lower end face of the longitudinal beam square tube 2.4, and the two ends thereof are provided with upward bending, and the two wear-resistant steel plates 2.9 are respectively matched and welded to the lower end faces of the corresponding longitudinal beam square tubes 2.4.

[0076] The hanger 1 comprises a hanger body 1.1, the hanger body 1.1 comprises a horizontal hanger assembly 1.11 and a column assembly 1.12, the horizontal hanger assembly 1.11 comprises a top layer hanger 1.111 and a middle layer hanger 1.112, the top layer hanger 1.111 and the middle layer hanger 1.112 are both horizontal rectangular frames formed by four square tubes 1.113 welded with each other, the column assembly 1.12 comprises four longitudinal square tubes 1.121, the bottom ends of the four longitudinal square tubes 1.121 are respectively fixedly connected to the top end face of the pry body 2, and the four fixed points sequentially connected form a rectangle, the top layer hanger 1.111 is horizontally matched and fixedly connected to the top end face of the four longitudinal square tubes 1.121, and the middle layer hanger 1.112 is matched and fixedly connected to the middle part of the four longitudinal square tubes 1.121 and is parallel to the top layer hanger 1.111.

[0077] The hanger 1 further comprises an auxiliary support 1.2, the auxiliary support 1.2 comprises two trapezoidal support beams 1.21 and two auxiliary support beams 1.22, each trapezoidal support beam 1.21 is composed of two short square tubes 1.211 and one long square tube 1.212 welded to each other to form an isosceles trapezoidal frame without a bottom, the two trapezoidal support beams 1.21 are symmetrically welded horizontally on the left and right sides of the top layer hanger 1.111 to form a horizontal polygonal frame, and the two auxiliary support beams 1.22 are respectively welded on the middle layer hanger 1.112 below the corresponding trapezoidal support beam 1.21, each auxiliary support beam 1.22 is composed of two parallel and spaced auxiliary support beam short square tubes 1.221 and an auxiliary support beam long square tube 1.222 welded to the middle part of the top end of the two auxiliary support beam short square tubes 1.221 to form an approximately The two short square tubes of each auxiliary support beam 1.22 are welded to the outer side walls of the corresponding square tubes 1.113 of the middle layer hanger 1.112.

[0078] The hook assembly 3 comprises a top layer hook assembly 3.3, two groups of second vertical column hook assemblies 3.4 and auxiliary beam hook assemblies 3.5, the top layer hook assembly 3.3 comprises a plurality of hooks, the outer side walls of each square tube of the top layer hanger 1.111 and the two trapezoidal support beams 1.21 are uniformly and spacedly welded with two hooks 3.112, and the hook tips of each hook are upward, the auxiliary beam hook assembly 3.5 comprises a plurality of L-shaped hooks 3.51, the two ends of each auxiliary support beam long square tube 1.222 are respectively welded with an L-shaped hook 3.51 and the hook tip is upward, and the long square tube 1.212 of each trapezoidal support beam 1.21 is also spacedly welded with two L-shaped hooks 3.51 and the hook tips are upward, each group of second vertical column hook assemblies 3.4 comprises four hooks 3.112, the four hooks 3.112 are respectively welded on the side walls of the four longitudinal square tubes 1.121 connected with the top layer hanger 1.111 / middle layer hanger 1.112, and each hook faces outward of the longitudinal square tube 1.121 and the hook tip is upward.

[0079] The pry body 2 further comprises four longitudinal beam sealing reinforcing plates 2.14, each longitudinal beam sealing reinforcing plate 2.14 is a rectangular plate matched with the cross section of the two ends of each longitudinal beam square tube 2.4, and the four longitudinal beam sealing reinforcing plates 2.14 are respectively matched and sealingly welded on the four ends of the two longitudinal beam square tubes 2.4.

[0080] The embodiment is the structure of the topcoat hanger, the requirements of the primer coating process and the topcoat coating process are different, the bumper is required to be hung on the topcoat hanger without shielding each other in the topcoat coating process, therefore the structures of the topcoat hanger and the primer hanger are different, the auxiliary support 1.2 needs to be additionally installed on the hanger main body 1.1, and in order to ensure the stability of the topcoat hanger during the transfer process after the bumper is hung, the position and angle of the fixed connection between the hanger main body 1.1 and the pry body 2 are changed, and the steel plates for reinforcement are installed at the corresponding positions.

[0081] Embodiment 3:

[0082] The application also provides a method for using the bumper painting hanger, comprising the following steps:

[0083] I. The step of using the bumper painting hanger for primer coating, as shown in Figure 3 and Figure 4 ;

[0084] S10, placing the bumper painting hanger on the hanger support platform, each bumper to be coated (not shown in Figure 3 and Figure 4 ) comprises two left and right hanging hole positions, manually threading the two hanging hole positions of each bumper through a pair of reinforcing hooks 3.11 symmetrically arranged on the two parallel square tubes in the top hanging rack 1.111 / middle hanging rack 1.112, the hook tips of the reinforcing hooks 3.11 pointing upwards, after all the bumpers are hung, all the bumpers are horizontally and horizontally spaced between the two parallel square tubes 1.113 in the top hanging rack 1.111 / middle hanging rack 1.112;

[0085] S11, calling AGV 4 through the calling system;

[0086] S12, AGV 4 enters the bottom of the bumper painting hanger according to the set route, scans the two-dimensional code on the AGV load body receiving plate 2.3 of the bumper painting hanger, and identifies that the bumper painting hanger is a primer hanger;

[0087] S13, the upper part of the AGV 4 is provided with a transfer support frame 4.1, the support bracket and the longitudinal butt joint square tube 2.5 on the transfer support frame 4.1 are butt jointed, the middle part of the support bracket is provided with a positioning pin 4.2, the transfer support frame 4.1 of the AGV 4 is lifted to abut against the longitudinal butt joint square tube 2.5 of the bumper painting hanger, and the positioning pin 4.2 is inserted into the AGV positioning pin hole 2.1 from below to realize that the bumper painting hanger is limited and fixed on the top end surface of the transfer support frame 4.1 of the AGV 4;

[0088] S14, the AGV 4 lifts the bumper painting hanger and enters the upper part of the primer process area according to the set route, the load body installed on the skid load body support 2.2 of the bumper painting hanger is recognized and butt jointed by the skid system, the transfer support frame 4.1 of the AGV 4 is lowered, the positioning pin 4.2 is separated from the AGV positioning pin hole 2.1, the bumper painting hanger is transferred from the transfer support frame 4.1 of the AGV 4 into the skid system, and the movement of the bumper painting hanger on the skid system is realized;

[0089] S15, the AGV 4 returns to the parking area according to the set route and waits for orders;

[0090] S16, the skid system forwards the bumper painting hanger to the upper part, the EMS hanging point assembly 2.10 of the pry body 2 is automatically connected with the EMS lifting tool, and the bumper painting hanger is covered by the EMS lifting tool to be pre-processed and electrophoresed;

[0091] II. The steps of using the bumper painting hanger to paint the top coat, as shown in Figure 5 and Figure 6 ;

[0092] S20, the bumper painting hanger provided with the trapezoidal support beam 1.21 and the auxiliary support beam 1.22 is placed on the hanger support platform 5, and different people according to the shapes of the bumpers (not shown in Figure 5 and Figure 6 ) select the bumpers that have completed the primer coating and use the appropriate top hook assembly 3.3, two groups of first vertical column hook assemblies 3.2 and auxiliary beam hook assemblies 3.5 to hang the bumpers, and the positions of the bumpers are ensured to not affect the painting of the top coat of each other;

[0093] S21, the AGV 4 is called through the calling system;

[0094] S22, the AGV 4 enters the lower part of the bumper painting hanger according to the set route from the bottom of the support platform 5 on which the bumper painting hanger is placed, the AGV 4 scans the two-dimensional code on the AGV load body receiving plate 2.3 of the bumper painting hanger and identifies that the bumper painting hanger is a hanger for the top coat;

[0095] S23, the upper part of the AGV 4 is provided with a transfer support frame 4.1, the support bracket and the longitudinal butt joint square tube 2.5 on the transfer support frame 4.1 are butt jointed, the middle part of the support bracket is provided with a positioning pin 4.2, the transfer support frame 4.1 of the AGV 4 is lifted to abut against the longitudinal butt joint square tube 2.5 of the bumper painting hanger, and the positioning pin 4.2 is inserted into the AGV positioning pin hole 2.1 from below to realize that the bumper painting hanger is limited and fixed on the top end surface of the transfer support frame 4.1 of the AGV 4;

[0096] S24, the AGV 4 carrying the bumper painting hanger enters the upper part area of the top coat process according to the set route, the load body support 2.2 of the bumper painting hanger is installed and recognized and butt jointed by the skid system, the transfer support frame 4.1 of the AGV 4 is lowered, the positioning pin 4.2 is separated from the AGV positioning pin hole 2.1, the bumper painting hanger is transferred from the transfer support frame 4.1 of the AGV 4 into the skid system, and the movement of the bumper painting hanger on the skid system is realized.

[0097] S25, the AGV 4 returns to the parking area according to the set route and waits for the next order.

[0098] The above embodiments are only used to illustrate the technical solutions of the present application, but not limit the present application; although the present application has been described in detail with reference to the foregoing embodiments, those ordinarily skilled in the art should understand: 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 bumper painting rack, characterized in that: The utility model comprises a hanger (1), a skid (2) and a hook assembly (3), wherein the main structure of the hanger (1) is a rectangular frame structure, the bottom of the hanger (1) is fixedly connected to the top of the skid (2), the skid (2) is a rectangular frame structure with a vertical upward protrusion in the middle, and comprises an AGV positioning pin hole (2.1), a skid carrier bracket (2.2) and an AGV carrier receiving plate (2.3), the hook assembly (3) is respectively fixedly connected to different positions of the hanger (1) for mounting different types of bumpers, the skid (2) comprises two longitudinal beam square tubes (2.4), two longitudinal butt-jointed square tubes (2.5), two "X"-shaped steel plates (2.6), two cross beam square tubes (2.7) and an AGV positioning cross beam square tube. Tube (2.8), two of the "J" shaped steel plates (2.6) are respectively fixed vertically to the left and right ends of the two longitudinal beam square tubes (2.4), and the two ends of each "J" shaped steel plate (2.6) are respectively fixedly connected to the upper end surface of the same side of the two longitudinal beam square tubes (2.4) and the top of the "J" shaped steel plate (2.6) is convex from the upper end surface of the longitudinal beam square tube (2.4), and the two cross beam square tubes (2.7) are arranged in parallel and spaced apart between the two "J" shaped steel plates (2.6), and each cross beam square tube (2.7) is a door frame structure and its two lower ends are symmetrically welded to the corresponding upper end surfaces of the two longitudinal beam square tubes (2.4) and the top of the cross beam square tube (2.7) is convex from the upper end surface of the longitudinal beam square tube (2.4), and the two longitudinal butt-jointed square tubes (2 .5) are arranged in parallel and at intervals between the two longitudinal beam square tubes (2.4), each longitudinal butt-jointed square tube (2.5) and the corresponding cross beam square tube (2.7) are vertically welded and fixed, the AGV positioning cross beam is arranged in parallel between the cross beam square tubes (2.7) and its two ends are respectively welded to the opposite inner side walls of the two longitudinal butt-jointed square tubes (2.5), the AGV code carrier receiving plate (2.3) is fixedly connected to the AGV positioning cross beam, the two longitudinal butt-jointed square tubes (2.5) are symmetrically provided with through AGV positioning pin holes (2.1), the sled code carrier bracket (2.2) is fixedly connected to one of the above-mentioned "X"-shaped steel plates (2.6), the skid body (2) also includes two wear-resistant steel plates (2.9), each of the wear-resistant steel plates The shape and size of (2.9) match the lower end surface of the longitudinal beam square tube (2.4) and the two ends thereof are provided with upward bends. The two wear-resistant steel plates (2.9) are respectively matched and welded to the lower end surfaces of the corresponding longitudinal beam square tubes (2.4). The hanger (1) includes a hanger body (1.1), the hanger body (1.1) includes a horizontal hanger assembly (1.11) and a column assembly (1.12), the horizontal hanger assembly (1.11) includes a top hanger (1.111) and a middle hanger (1.112), the top hanger (1.111) and the middle hanger (1.112) are both horizontal rectangular frames formed by welding four horizontal square tubes (1.113) to each other, and the column assembly (1.12) includes four longitudinal square tubes (1.121), the bottom ends of the four longitudinal square tubes (1.121) are respectively fixedly connected to the top end surface of the skid body (2) and the four fixed points are sequentially connected to form a rectangle, the top hanging rack (1.111) is horizontally matched and fixedly connected to the top end surface of the four longitudinal square tubes (1.121), the middle hanging rack (1.112) is matched and fixedly connected to the middle of the four longitudinal square tubes (1.121) and is parallel to the top hanging rack (1.111), and a transfer support frame (4.1) is provided on the upper part of the AGV (4), and the support bracket on the transfer support frame (4.1) is used to connect with the longitudinal The docking square tube (2.5) is docked, and a positioning pin (4.2) is provided in the middle of the support bracket. The positioning pin (4.2) is used for the transfer support frame (4.1) of the AGV (4) to rise and support the longitudinal docking square tube (2.5), and then inserted into the AGV positioning pin hole (2.1) from the bottom, so that the bumper coating rack is fixed on the top surface of the transfer support frame (4.1) of the AGV (4). The AGV (4) scans the QR code on the AGV code carrier receiving plate (2.3) of the bumper coating rack to identify whether the bumper coating rack is a primer rack or a topcoat rack.

2. The bumper painting rack according to claim 1, characterized in that: The skid body (2) further comprises four longitudinal beam sealing reinforcement plates (2.14), each of the longitudinal beam sealing reinforcement plates (2.14) being a rectangular plate having a cross-section matching that of the two end heads of each longitudinal beam square tube (2.4), and the four longitudinal beam sealing reinforcement plates (2.14) are respectively matched and sealed and welded to the four end heads of the two longitudinal beam square tubes (2.4).

3. The bumper painting rack according to claim 2, characterized in that: The hook assembly (3) includes two groups of reinforced hook assemblies (3.1) and two groups of first column hook assemblies (3.2). The bumper painting rack composed of the hanger (1), the skid (2), the two groups of reinforced hook assemblies (3.1) and the two groups of first column hook assemblies (3.2) is used for primer painting. The two groups of reinforced hook assemblies (3.1) are respectively welded to the top hanger (1.111) and the middle hanger (1.112). Each group of reinforced hook assemblies (3.1) includes multiple pairs of reinforced hooks (3.11). Each reinforced hook (3.11) includes a reinforced short tube (3.111) and two hooks (3.112). The two hooks (3.112) are respectively symmetrically welded to the left and right sides of the reinforced short tube (3.111). On the side wall, each pair of the reinforcing hooks (3.11) is symmetrically welded to two parallel horizontal square tubes (1.113) of the top-level hanger (1.111) / middle-level hanger (1.112) with the hook tips facing upwards, and two groups of first column hook assemblies (3.2) are respectively welded to the longitudinal square tubes (1.121) connected to the top-level hanger (1.111) and the middle-level hanger (1.112). Each group of first column hook assemblies (3.2) includes eight hooks (3.112). The eight hooks (3.112) are welded in groups of two to the left and right side walls of the four longitudinal square tubes (1.121) connected to the top-level hanger (1.111) / middle-level hanger (1.112) and are arranged in the same direction as the adjacent reinforcing hooks (3.11).

4. The bumper painting rack according to claim 3, characterized in that: The skid body (2) of the bumper coating hanger for primer coating also includes four groups of EMS hanging point assemblies (2.10). The four groups of EMS hanging point assemblies (2.10) are evenly spaced and fixedly connected to the upper end surfaces of two longitudinal beam square tubes (2.4) and are symmetrical in pairs. Each group of EMS hanging point assemblies (2.10) includes an EMS hanger fixing hook (2.11), a fixing plate (2.12) and a reinforcing plate (2.13). The lower end surface of the fixing plate (2.12) is welded and fixed to the upper end surface of the longitudinal beam square tube (2.4) and one end extends out of the two longitudinal beam square tubes (2.4). The bottom of the EMS hanger fixing hook (2.11) is welded to the upper end surface of the fixing plate (2.12) extending out of the longitudinal beam square tube (2.4). The reinforcing plate (2.13) is vertically welded to the fixing plate (2.12).

5. The bumper painting rack according to claim 2, characterized in that: The rack (1) further comprises an auxiliary bracket (1.2). The bumper coating rack, which is composed of the rack (1) provided with the auxiliary bracket (1.2), the skid body (2) and the hook assembly (3), is used for topcoat coating. The auxiliary bracket (1.2) comprises two trapezoidal support beams (1.21) and two auxiliary support beams (1.22). Each trapezoidal support beam (1.21) is formed by welding two short square tubes (1.211) and one long square tube (1.212) to form an isosceles trapezoidal frame without a bottom. The two trapezoidal support beams (1.21) are symmetrically welded horizontally on the left and right sides of the top rack (1.111) to form a horizontal polygonal frame. The two auxiliary support beams (1.22) are respectively welded on the middle rack (1.112) below the corresponding trapezoidal support beams (1.21). Each auxiliary support beam (1.22) is approximately formed by welding the top ends of two parallel and spaced auxiliary support beam short square tubes (1.221) to the middle of an auxiliary support beam long square tube (1.222). The frame structure is in the shape of a letter "1", and the two short square tubes of each auxiliary support beam (1.22) are welded to the outer side wall of the horizontal square tube (1.113) corresponding to the middle-layer hanging frame (1.112).

6. The bumper painting rack according to claim 5, characterized in that: The hook assembly (3) of the bumper coating rack for topcoat coating comprises a top hook assembly (3.3), two sets of second column hook assemblies (3.4) and an auxiliary beam hook assembly (3.5), wherein the top hook assembly (3.3) comprises a plurality of hooks, two hooks (3.112) are welded evenly spaced on the outer side wall of each square tube of the top hanger (1.111) and the two trapezoidal support beams (1.21), and the hook tip of each hook faces upwards, and the auxiliary beam hook assembly (3.5) comprises a plurality of L-shaped hooks (3.51), and each auxiliary support beam rectangular tube (1.222) is welded on the outer side wall of each square tube. The two ends of the trapezoidal support beam (1.21) are respectively welded with the L-shaped hooks (3.51) with the hook tips facing upwards, and the rectangular tube (1.212) of each trapezoidal support beam (1.21) is further welded with two L-shaped hooks (3.51) at intervals with the hook tips facing upwards. Each set of second column hook components (3.4) includes four hooks (3.112), and the four hooks (3.112) are respectively welded to the side walls of four longitudinal square tubes (1.121) connected to the top rack (1.111) / middle rack (1.112), and each hook faces outside the longitudinal square tube (1.121) with the hook tip facing upwards.

7. A method for using a bumper painting rack, characterized in that: The steps are as follows: (1) Steps of applying primer using the bumper coating rack as claimed in claim 4: S10. Place the bumper painting rack on the rack support platform (5). Each bumper to be painted includes two left and right mounting holes. Manually pass the two mounting holes of each bumper through a pair of reinforcing hooks (3.11) symmetrically arranged on two parallel horizontal square tubes (1.113) of the top rack (1.111) / middle rack (1.112). The hook tips of the reinforcing hooks (3.11) face upward. After all bumpers are mounted, all bumpers are mounted horizontally and spaced apart between the two parallel horizontal square tubes (1.113) of the top rack (1.111) / middle rack (1.112). S11, calling the AGV (4) through the calling system; S12, the AGV (4) enters the bottom of the bumper coating rack from the bottom of the rack support platform (5) where the bumper coating rack is placed according to the set route to the bottom of the bumper coating rack, and the AGV (4) scans the QR code on the AGV code carrier receiving plate (2.3) of the bumper coating rack to identify that the bumper coating rack is a primer rack; S13, a transfer support frame (4.1) is provided on the upper part of the AGV (4), a support bracket on the transfer support frame (4.1) is connected to the longitudinal docking square tube (2.5), a positioning pin (4.2) is provided in the middle of the support bracket, the transfer support frame (4.1) of the AGV (4) rises to support the longitudinal docking square tube (2.5) of the bumper coating rack, and the positioning pin (4.2) is inserted into the AGV positioning pin hole (2.1) from below to achieve the limit fixation of the bumper coating rack on the top surface of the transfer support frame (4.1) of the AGV (4); S14, the AGV (4) lifts the bumper coating rack and enters the loading area of ​​the primer process according to the set route. The code carrier installed on the sled code carrier bracket (2.2) of the bumper coating rack is identified and docked by the sled system. The transfer support frame (4.1) of the AGV (4) is lowered, and the positioning pin (4.2) is separated from the AGV positioning pin hole (2.1). The bumper coating rack is transferred from the transfer support frame (4.1) of the AGV (4) into the sled system, realizing the movement of the bumper coating rack on the sled system. S15, AGV (4) returns to the parking area according to the set route and waits for further orders; S16, the sled system transports the bumper coating hanger forward to the upper part, the EMS hanging point assembly (2.10) of the skid body (2) is automatically connected to the EMS hanger, and the bumper is wrapped by the EMS hanger for pre-treatment and electrophoresis; (2) Steps of applying topcoat using the bumper coating rack as claimed in claim 6: S20, using the bumper painting rack provided with a trapezoidal support beam (1.21) and an auxiliary support beam (1.22), placing it on the rack support platform (5), and manually selecting suitable top hook assemblies (3.3), two sets of second column hook assemblies (3.4), and auxiliary beam hook assemblies (3.5) to hang the bumpers that have been primed, according to the different shapes of each bumper, in such a way that the locations of the hangings ensure that the topcoat painting of all bumpers will not affect each other; S21, calling the AGV (4) through the calling system; S22, the AGV (4) enters the bottom of the bumper coating rack from the bottom of the rack support platform (5) where the bumper coating rack is placed, and arrives directly below the bumper coating rack according to the set route. The AGV (4) scans the QR code on the AGV code carrier receiving plate (2.3) of the bumper coating rack, and recognizes that the bumper coating rack is a topcoat rack; S23, a transfer support frame (4.1) is provided on the upper part of the AGV (4), a support bracket on the transfer support frame (4.1) is connected to the longitudinal docking square tube (2.5), a positioning pin (4.2) is provided in the middle of the support bracket, the transfer support frame (4.1) of the AGV (4) rises to support the longitudinal docking square tube (2.5) of the bumper coating rack, and the positioning pin (4.2) is inserted into the AGV positioning pin hole (2.1) from below to achieve the limit fixation of the bumper coating rack on the top surface of the transfer support frame (4.1) of the AGV (4); S24, the AGV (4) lifts the bumper coating rack and enters the loading area of ​​the topcoat process according to the set route. The code carrier installed on the sled code carrier bracket (2.2) of the bumper coating rack is identified and docked by the sled system. The transfer support frame (4.1) of the AGV (4) is lowered, and the positioning pin (4.2) is separated from the AGV positioning pin hole (2.1). The bumper coating rack is transferred from the transfer support frame (4.1) of the AGV (4) into the sled system, realizing the movement of the bumper coating rack on the sled system. S25, AGV (4) returns to the parking area according to the set route and waits.

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