Bumper coating hanger and using method

Abstract

The invention belongs to the technical field of coating hangers, and discloses a bumper coating hanger and a using method.The bumper coating hanger comprises a hanging frame, a prying body and a hook assembly, the main body structure of the hanging frame is of a cuboid frame structure, the bottom of the hanging frame is fixedly connected to the top of the prying body, and the prying body is of a rectangular frame structure with the middle vertically protruding upwards; comprising an AGV positioning pin hole, a skid code carrier support and an AGV code carrier bearing plate, and the hook assemblies are fixedly connected to different positions of the hanging frame respectively and used for hanging bumpers of different models. According to the hanging tool structure, the manufacturing cost and time of a primer hanging tool and a finish paint hanging tool are saved, the universality of the hanging tool is improved, and the hanging tool structure is suitable for hanging bumpers of different vehicle types; the skid body of the hanging tool is in flexible butt joint with the AGV, the skid code carrying body installed on the skid code carrying body support and the two-dimensional code arranged on the AGV code carrying body bearing plate achieve automatic hanging tool transferring and automatic workpiece feeding of the AGV, the transferring risk is reduced, the working efficiency is improved, and the labor cost is saved.

Description

Technical Field

[0001] The invention belongs to the technical field of painting hangers, and in particular, relates to a bumper painting hanger and a use method thereof. Background Art

[0002] In recent years, as commercial vehicle users have gradually increased their requirements for quality, styling, and aesthetics, bumpers, as key safety devices that absorb and mitigate impact and protect the vehicle body, have also begun to develop in a diversified manner. However, after the commercial vehicle bumper is assembled, it is necessary to use special equipment for in-factory transportation. The specific process is as follows:

[0003] (1) The process of transporting white parts of bumpers is as follows: the white parts are pulled from the logistics vehicle to the electrophoresis coating line through logistics equipment, manually removed and mounted on the bumper primer hanger, and the primer hanger is transported to the primer sled using a forklift or overhead crane, and the bumper is electrophoresed.

[0004] (2) The transportation process of bumpers after electrophoretic painting is as follows: the painted bumpers are manually disassembled and mounted on bumper topcoat hangers, which are then pulled to the topcoat painting line by a logistics vehicle, and the topcoat hangers are transferred to the topcoat sled using a forklift or overhead crane, and the bumpers are then sprayed with topcoat.

[0005] The bumper has the following disadvantages during transportation and installation:

[0006] (1) During the transportation process of bumper hangers, there are problems such as large logistics volume and low automation rate.

[0007] (2) During the docking process between the bumper hanger and the sled system, there are problems such as the danger of forklift transportation and the large workload of personnel.

[0008] Automated Guided Vehicle (AGV), also known as automatic guided transporter or automated guided transporter. AGV is widely used in automobile companies. If AGV can be used to replace existing logistics vehicles, forklifts, overhead cranes, etc. to transport bumper hangers and dock with the sled system, it can solve the problems of heavy weight, large volume, difficult transportation, difficult operation, and dangerous transportation of paint hangers after the bumper is installed. However, the structure of existing paint hangers cannot be flexibly docked with AGV, and the hangers for primer and topcoat are quite different, requiring different hangers for transportation, and the hangers cannot be applied to different models of bumpers, with low versatility and high manufacturing costs. Summary of the invention

[0009] The purpose of the present invention is to provide a bumper painting rack and a method of using the same. A rectangular convex frame structure is provided in the middle of the skid body of the rack to match the shape of the AGV transfer support frame, and AGV locating pin holes are provided on the longitudinal docking square tube of the rack to cooperate with the locating pins on the AGV transfer support frame to achieve flexible docking between the rack and the AGV transfer support frame, so that the AGV can safely and stably lift the rack forward, reducing the risk of transportation and saving labor costs. The design of the skid body and the rack body of the rack can reduce the production cost of the rack. The primer rack can appropriately adjust the fixed angles of the skid body and the rack body, and add trapezoidal support beams and auxiliary The auxiliary support beam is matched with hook components of different specifications and the hook components are fixed at different positions to complete the topcoat hanger, which reduces the production cost of the hanger; the hooks of different specifications fixedly installed at different positions on the topcoat hanger enable the bumpers of different models to be mounted on the same topcoat hanger, which improves the versatility of the hanger; the sled carrier bracket and the AGV carrier receiving plate of the hanger realize the automatic identification of the primer hanger and the topcoat hanger by the AGV, the automatic planning of the loading route, and the automatic docking with the sled system, thus realizing automatic transfer, eliminating the process of logistics vehicle transportation, reducing the logistics volume and the workload of personnel, and improving production efficiency.

[0010] The specific contents of the plan are as follows:

[0011] A bumper painting rack comprises a rack, a skid and a hook assembly. The main structure of the rack is a rectangular frame structure. The bottom of the rack is fixedly connected to the top of the skid. The skid is a rectangular frame structure with a vertical upward protrusion in the middle, comprising an AGV locating pin hole, a sled code carrier bracket and an AGV code carrier receiving plate. The hook assemblies are fixedly connected to different positions of the rack for mounting different types of bumpers.

[0012] Due to the different operations of primer and topcoat painting, the bumper is mounted at different positions on the primer hanger and the topcoat hanger. The existing primer hanger and topcoat hanger have different structures and need to be made separately to meet the needs of painting. The hanger cost is high and it is time-consuming and labor-intensive. The main structure of the hanger of the bumper painting hanger of the present invention is a rectangular frame structure, the bottom of which is fixed to the top of the skid body by welding and / or bolts, and the hook assembly includes multiple groups of hooks of different sizes, shapes and installation positions. The skid body is provided with a sled code body bracket and an AGV code body receiving plate, which constitute the basic structure of the hanger. Four sets of EMS hanging point components are installed on the skid of the primer hanger to enter the lifting hanging points of the primer coating line. The bumper is inserted into the corresponding hanging holes on the left and right ends of the bumper through the reinforcing hooks symmetrically arranged on the top hanger / middle hanger to realize horizontal hanging on the primer hanger; the sled code body is installed on the sled code body bracket of the skid body, and a QR code is provided on the AGV code body receiving plate. The AGV identifies the primer hanger or the topcoat hanger through the QR code on the AGV code body receiving plate, and transfers it to the loading area of ​​the primer coating according to the set program. The sled system sends the hanger into the electrothermal pool through the sled code body recognition docking, and the AGV completes the transfer of the primer hanger. The rectangular convex structure of the skid body of the hanger matches the transfer support frame lifted by the AGV top and is connected through the AGV positioning pin hole on the skid body and the positioning pin on the AGV transfer support frame, so as to realize the flexible docking between the hanger and the AGV and ensure the stability of the hanger and the bumper during the transfer process. It has a high degree of automation, avoids the risk of using traditional logistics vehicles for transfer, reduces labor intensity, saves labor costs, and improves production efficiency. The topcoat hanger of the present invention does not need to be redesigned in structure. It only needs to adjust the position and angle of the fixed connection between the bottom of the hanger and the skid body according to the usage, and add a trapezoidal support beam and an auxiliary support beam to the hanger body of the primer hanger, and weld hooks of different specifications at different positions of the hanger, so as to realize the installation of bumpers of various models, save the production cost and production cycle of the topcoat hanger, and improve the versatility of the painting hanger.

[0013] Furthermore, the skid body includes two longitudinal beam square tubes, two longitudinal butt-jointed square tubes, two "J"-shaped steel plates, two cross beam square tubes and an AGV positioning cross beam square tube. The two "J"-shaped steel plates are respectively vertically fixed to the left and right ends of the two longitudinal beam square tubes, and the two ends of each "J"-shaped steel plate are respectively fixedly connected to the upper end surface of the same side of the two longitudinal beam square tubes and the top of the "J"-shaped steel plate is convex to the upper end surface of the longitudinal beam square tube. The two cross beam square tubes are arranged in parallel and spaced between the two "J"-shaped steel plates. Each cross beam square tube is a door frame-shaped structure and its two lower ends are symmetrically welded to the corresponding ends of the two longitudinal beam square tubes. The top of the crossbeam square tube is convex on the upper end surface and the top of the crossbeam square tube is higher than the upper end surface of the longitudinal beam square tube. Two longitudinal butt-jointed square tubes are arranged in parallel and spaced apart between the two longitudinal beam square tubes. Each longitudinal butt-jointed square tube is vertically welded and fixed to the corresponding crossbeam square tube. The AGV positioning crossbeam is arranged in parallel between the crossbeam square tubes and its two ends are respectively welded to the opposite inner walls of the two longitudinal butt-jointed square tubes. The AGV code carrier receiving plate is fixedly connected to the AGV positioning crossbeam. The two longitudinal butt-jointed square tubes are symmetrically provided with through AGV positioning pin holes. The sled code carrier bracket is fixedly connected to any one of the "X"-shaped steel plates.

[0014] The skids of the primer hanger and the topcoat hanger of the present invention are both support points. The AGV enters under the skid and lifts and then transports. After being transported to the coating line, the AGV falls and drops the hanger onto the roller bed, docks the skid system, and then the skid performs the transportation work, and the AGV returns. The skid, i.e., the support point, is suitable for a general roller bed structure for coating. The two longitudinal docking square tubes of the skid of the present invention are arranged in parallel and spaced between the two longitudinal beam square tubes, and the two cross beam square tubes are arranged in parallel and spaced between the two "J"-shaped steel plates. The two longitudinal beam square tubes and the two longitudinal docking square tubes correspond to each other and are vertically welded and fixed with the two "J"-shaped steel plates and the two cross beam square tubes to form a rectangular grid frame, and the middle rectangular area is convex. The AGV positioning cross beam square tube is vertically welded between the two longitudinal docking square tubes and is located between the two cross beam square tubes for fixing the AGV code carrier receiving plate. The skid code carrier bracket is fixedly mounted on the "J"-shaped steel plate where the AGV enters the skid. The skid is composed of square tubes and hot-rolled steel plates to reduce the weight of the hanger.

[0015] Furthermore, the skid body also includes two wear-resistant steel plates, each of which has a shape and size that matches the lower end surface of the longitudinal beam square tube and has upward bends at both ends. The two wear-resistant steel plates are respectively matched and welded to the lower end surface of the corresponding longitudinal beam square tube.

[0016] The lower end surfaces of the two longitudinal square tubes of the skid body are matched and welded with wear-resistant steel plates, which can enhance the wear resistance of the skid. The bending angle of the wear-resistant steel plates is 171.5° to facilitate the docking of the skid body and the roller bed.

[0017] Furthermore, 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-level hanger and a middle-level hanger, the top-level hanger and the middle-level hanger are both formed by four horizontal square tubes welded to each other to form a horizontal rectangular frame, the column assembly includes four longitudinal square tubes, the bottom ends of the four longitudinal square tubes are respectively fixedly connected to the top end surface of the skid body and the four fixed points are sequentially connected to form a rectangle, the top-level hanger is horizontally matched and fixedly connected to the top end surfaces of the four longitudinal square tubes, and the middle-level hanger is matched and fixedly connected to the middle of the four longitudinal square tubes and is parallel to the top-level hanger.

[0018] The hanger body of the present invention is composed of two horizontal hangers, namely the top hanger and the middle hanger, which are fixedly connected at the top and the middle of four vertically arranged square tubes, and the bottoms of the four square tubes are fixedly connected to the top of the skid body. This part of the structure is the basic structure of the primer hanger of the present invention. By changing the position and angle of the fixed connection between the bottom of the hanger body and the top of the skid body, adding a trapezoidal support beam to the top hanger, adding an auxiliary support beam to the middle hanger, and fixing different hook components at different positions of the hanger body, the structure of the topcoat hanger can be obtained, which improves the versatility of the hanger, saves the production cost and cycle of the hanger, and saves labor.

[0019] Furthermore, the hanger also includes an auxiliary support, which includes two trapezoidal support beams and two auxiliary support beams. Each trapezoidal support beam is composed of two short square tubes and one rectangular tube welded together to form an isosceles trapezoidal frame without a bottom. The two trapezoidal support beams are symmetrically welded horizontally on the left and right sides of the top hanger to form a horizontal polygonal frame. The two auxiliary support beams are respectively welded to the middle hanger below the corresponding trapezoidal support beams. Each auxiliary support beam is composed of two parallel and spaced short square tubes of auxiliary support beams welded to the top ends of an auxiliary support beam rectangular tube and the middle part of the rectangular tube to form an approximately U-shaped frame structure. The two short square tubes of each auxiliary support beam are welded to the outer wall of the horizontal square tube corresponding to the middle hanger.

[0020] The two trapezoidal support beams and the two auxiliary support beams are symmetrically fixedly connected to the corresponding horizontal rack components to form the rack structure of the topcoat rack, which saves time, effort and cost. The trapezoidal support beams and the auxiliary support beams mentioned in the present invention are not the only shapes, and the shapes can also be changed according to production needs.

[0021] Furthermore, the hook assembly includes two groups of reinforced hook assemblies and two groups of first column hook assemblies, the two groups of reinforced hook assemblies are respectively welded to the top-level hanger and the middle-level hanger, each group of reinforced hook assemblies includes multiple pairs of reinforced hooks, each reinforced hook includes a reinforced short tube and two hooks, the two hooks are symmetrically welded to the left and right side walls of the reinforced short tube, each pair of reinforced hooks are symmetrically welded to two parallel horizontal square tubes of the top-level hanger / middle-level hanger with the hook tips facing upward, the two groups of first column hook assemblies are respectively welded to the longitudinal square tubes connected to the top-level hanger and the middle-level hanger, each group of column group hook assemblies includes eight hooks, the eight hooks are respectively welded in groups of two to the left and right side walls of the four longitudinal square tubes connecting the top-level hanger / middle-level hanger and are arranged in the same direction as the adjacent reinforced hooks.

[0022] The hook assembly of the primer hanger includes reinforcing hooks symmetrically arranged on the top hanger / middle hanger and hooks fixed on the corresponding columns on the top hanger / middle hanger. The bumpers to be primer-coated are horizontally spaced and hung in a row. The AGV transports the primer hanger and the bumper to the electrothermal pool together. The primer hanger and the bumper enter the electrothermal pool together, so the bumpers can be arranged closely in this way without affecting the coating effect.

[0023] Furthermore, the skid body also includes four groups of EMS hanging point assemblies, which are evenly spaced and fixedly connected to the upper end surfaces of the two longitudinal beam square tubes and are symmetrical in pairs. Each group of EMS hanging point assemblies includes a hook for fixing an EMS sling, a fixing plate and a reinforcing plate. The lower end surface of the fixing plate is welded and fixed to the upper end surface of the longitudinal beam square tube and one end extends out of the two longitudinal beam square tubes. The bottom of the hook for fixing the EMS sling is welded to the upper end surface of the fixing plate extending out of the longitudinal beam square tube, and the reinforcing plate is vertically welded to the fixing plate.

[0024] The Electric Monorail Suspension Conveyor System (EMS) is a suspension conveyor system used for material transportation within the factory. The four sets of EMS hanging point components installed on the skid are used for pre-treatment of primer coating and automatic fixation of EMS hangers before loading parts before electrophoresis. The EMS hanger wraps the primer hanger and all the mounted bumpers together for pre-treatment and electrophoresis operations.

[0025] Furthermore, the hook assembly includes a top-level hook assembly, two groups of second column hook assemblies and an auxiliary beam hook assembly. The top-level hook assembly includes a plurality of hooks. Two hooks are evenly welded on the outer wall of each square tube of the top-level hanger and the two trapezoidal support beams, and each hook tip faces upward. The auxiliary beam hook assembly includes a plurality of L-shaped hooks. L-shaped hooks are respectively welded on both ends of the rectangular tube of each auxiliary support beam, and the hook tips face upward. Two L-shaped hooks are also welded on the rectangular tube of each trapezoidal support beam, and the hook tips face upward. Each group of second column group hook assemblies includes four hooks, and the four hooks are respectively welded on the side walls of four longitudinal square tubes connected to the top-level hanger / middle-level hanger, and each hook faces outside the longitudinal square tube, and the hook tip faces upward.

[0026] The hook assembly of the topcoat hanger is different from the hook assembly on the primer hanger, because when the topcoat is applied, the bumpers cannot block each other to avoid affecting the coating effect. The topcoat hanger not only has a different hanger structure from the primer hanger, but also has different hook shapes and sizes, and the installation positions are also different. According to actual production needs, different hooks are welded and fixed to corresponding positions, which can realize the installation of bumpers of various models and improve the versatility of the topcoat hanger. The type and fixed position of the hook assembly mentioned in the present invention are only one of them, and can be adjusted as needed in actual applications.

[0027] Furthermore, the skid body also includes four longitudinal beam sealing reinforcement plates, each longitudinal beam sealing reinforcement plate is a rectangular plate matching the cross-section of the two end heads of each longitudinal beam square tube, and the four longitudinal beam sealing reinforcement plates are respectively matched and sealed and welded to the four end heads of the two longitudinal beam square tubes.

[0028] Four rectangular reinforcing plates are welded at both ends of the two longitudinal square tubes of the skid body, which not only enhance the strength of the two longitudinal square tubes, but also prevent paint mist from entering the longitudinal square tubes during spraying to form paint residue, thereby affecting the operation of the skid on the roller bed.

[0029] A method for using a bumper painting hanger comprises the following steps:

[0030] (I) Steps of using the bumper painting rack to apply primer:

[0031] S10, placing the bumper painting rack on the rack support platform, each bumper to be painted includes two left and right mounting holes, manually passing the two mounting holes of each bumper through a pair of reinforcing hooks symmetrically arranged on two parallel horizontal square tubes of the top rack / middle rack, with the hook tips of the reinforcing hooks facing upward, and after all the bumpers are mounted, all the bumpers are mounted horizontally and spaced between the two parallel horizontal square tubes of the top rack / middle rack;

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

[0033] S12, the AGV enters from the bottom of the support platform where the bumper painting rack is placed to directly below the bumper painting rack according to the set route, and the AGV system scans the QR code on the AGV carrier receiving plate of the bumper painting rack to identify that the bumper painting rack is a primer rack;

[0034] S13, a transfer support frame is provided on the upper part of AGV 4, the support bracket on the transfer support frame is connected with the longitudinal butt-jointed square tube, a positioning pin is provided in the middle of the support bracket, the transfer support frame of AGV rises to support the longitudinal butt-jointed square tube of the bumper coating rack, and the positioning pin is inserted into the positioning pin hole of AGV from below to realize the limit fixing of the bumper coating rack on the top surface of the transfer support frame of AGV;

[0035] S14, the AGV lifts the bumper painting rack and enters the loading area of ​​the primer process according to the set route. The tag mounted on the sled tag bracket of the bumper painting rack is identified and docked by the sled system. The AGV transfer support frame is lowered, and the positioning pin is disengaged from the AGV positioning pin hole. The bumper painting rack is transferred from the AGV transfer support frame to the sled system, and the bumper painting rack moves on the sled system.

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

[0037] S16, the sled system transports the bumper coating hanger forward to the upper part, the EMS hanging point assembly of the skid body is automatically connected to the EMS hanger, and the bumper coating hanger is wrapped by the EMS hanger for pre-treatment and electrophoresis;

[0038] (ii) Steps of applying topcoat using the bumper painting rack:

[0039] S20, using the bumper painting hanger provided with a trapezoidal support beam and an auxiliary support beam, placing it on the hanger support platform, and manually selecting suitable top hook assemblies, two sets of column hook assemblies, and auxiliary beam hook assemblies to hang the bumpers that have been painted with primer according to different bumper shapes, and the hanging positions ensure that all bumpers will not affect the painting of topcoats on each other;

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

[0041] S22, the AGV enters the bottom of the support platform where the bumper painting rack is placed according to the set route to the bottom of the bumper painting rack, and the AGV system scans the QR code on the AGV code carrier receiving plate of the bumper painting rack to identify that the bumper painting rack is a topcoat rack;

[0042] S23, a transfer support frame is provided on the upper part of the AGV, the support bracket on the transfer support frame is connected to the longitudinal butt-jointed square tube, a positioning pin is provided in the middle of the support bracket, the transfer support frame of the AGV rises to support the longitudinal butt-jointed square tube of the bumper coating hanger, and the positioning pin of the support bracket is inserted into the positioning pin hole of the AGV from below to realize the limit fixing of the bumper coating hanger on the top surface of the transfer support frame of the AGV;

[0043] S24, the AGV lifts the bumper painting rack and enters the loading area of ​​the primer process according to the set route. The tag mounted on the sled tag bracket of the bumper painting rack is identified and docked by the sled system. The AGV transfer support frame is lowered, and the positioning pin is disengaged from the AGV positioning pin hole. The bumper painting rack is transferred from the AGV transfer support frame to the sled system, and the bumper painting rack moves on the sled system.

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

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

[0046] 1. The convex structure in the middle of the skid body of the present invention matches the shape of the AGV transport support frame, and the AGV positioning pin hole is arranged on the longitudinal docking square tube of the hanger to cooperate with the positioning pin on the AGV transport support frame to achieve flexible docking between the hanger and the AGV transport support frame, so that the AGV can safely and stably lift the hanger forward, reducing the risk of transportation and saving labor costs;

[0047] 2. The main structure of the primer hanger of the present invention is that the skid body and the hanger body are fixedly connected. This structure can reduce the production cost of the hanger. The topcoat hanger can be obtained by simply adjusting the position or angle of the fixed connection between the top of the skid body and the bottom of the hanger body, adding a trapezoidal support beam and an auxiliary support beam, matching hook components of different specifications, and fixing the hook components at different positions, thereby reducing the production cost of the hanger;

[0048] 3. The hooks of different specifications fixedly installed at different positions on the primer hanger and the topcoat hanger of the present invention enable bumpers of different models to be mounted on the same hanger, thereby improving the versatility of the hanger;

[0049] 4. The two-dimensional code set on the AGV tag carrier receiving plate of the present invention enables the AGV to automatically identify the primer hanger and the topcoat hanger and select the loading route according to the set program. The sled tag carrier installed on the sled tag carrier bracket can realize automatic docking with the sled system for loading, realizing the automatic transportation of the painting hanger, reducing the logistics volume and the workload of personnel, and improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] Figure 1 This is a schematic structural diagram of a primer hanger according to Example 1 of the present invention;

[0051] Figure 2 This is a schematic structural diagram of a topcoat hanger according to Embodiment 2 of the present invention;

[0052] Figure 3 This is a working schematic diagram of the AGV flexible docking primer hanger in the method of use of Example 3 of the present invention;

[0053] Figure 4 A top view of the AGV flexible docking primer hanger in the method of use of Example 3 of the present invention;

[0054] Figure 5 This is a schematic diagram of the working of the AGV flexible docking paint hanger in the method of use of Example 3 of the present invention;

[0055] Figure 6 This is a front view of the AGV flexible docking paint rack in the method of use of Example 3 of the present invention.

[0056] In the figure:

[0057] 1. rack; 1.1. rack body; 1.11. horizontal rack assembly; 1.111. top rack;

[0058] 1.112. Middle rack; 1.113. Horizontal square tube; 1.12. Column assembly; 1.121. Longitudinal square tube; 1.2. Auxiliary bracket; 1.21. Trapezoidal support beam; 1.211. Short square tube; 1.212. Rectangular tube; 1.22. Auxiliary support beam; 1.221. Auxiliary support beam short square tube; 1.222. Auxiliary support beam rectangular tube; 2. Skid; 2.1. AGV positioning pin hole; 2.2. Sled code carrier bracket;

[0059] 2.3. AGV code carrier receiving plate; 2.4. Longitudinal beam square tube; 2.5. Longitudinal butt joint square tube; 2.6.

[0060] 2.7. Square tube for cross beam; 2.8. Square tube for AGV positioning cross beam; 2.9. Wear-resistant steel plate; 2.10. EMS hanging point assembly; 2.11. Hook for EMS sling fixation; 2.12. Fixing plate; 2.13. Reinforcement plate; 2.14. Longitudinal beam sealing reinforcement plate; 3. Hook assembly; 3.1.

[0061] Reinforced hook assembly; 3.11 Reinforced hook; 3.111. Reinforced short tube; 3.112. Hook; 3.2.

[0062] First column hook assembly; 3.3. Top hook assembly; 3.4. Second column hook assembly; 3.5. Auxiliary beam hook assembly; 3.51. L-shaped hook; 4. AGV; 4.1. Positioning pin; 5.

[0063] Hanger support platform. DETAILED DESCRIPTION

[0064] In order to make the purpose, technical scheme and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0065] The terms used in the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The singular forms "a", "said" and "the" used in the present invention and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings, and "multiple" generally includes at least two.

[0066] It should be noted that the directions or positional relationships indicated by the terms "front", "rear", "inside", "outside", "left", "right", etc. in the present invention are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0067] It is particularly important to point out that any symbol and / or number in the specification which is not marked in the accompanying drawings is not a drawing mark.

[0068] The embodiment provided by the present invention, that is, an embodiment of a bumper coating rack and a method of use, is described below in combination with Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 Provide detailed explanation.

[0069] Embodiment 1:

[0070] See Figure 1As shown, a bumper painting rack includes a rack 1, a skid 2 and a hook assembly 3. The main structure of the rack 1 is a rectangular frame structure. The bottom of the rack 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, including an AGV locating pin hole 2.1, a sled carrier bracket 2.2 and an AGV carrier receiving plate 2.3. The hook assemblies 3 are fixedly connected to different positions of the rack 1 for mounting different types of bumpers.

[0071] The skid body 2 includes two longitudinal beam square tubes 2.4, two longitudinal butt-jointed square tubes 2.5, two "J"-shaped steel plates 2.6, two cross beam square tubes 2.7 and an AGV positioning cross beam square tube 2.8. The two "J"-shaped steel plates 2.6 are respectively vertically fixed 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 on the upper end surface of the longitudinal beam square tube 2.4. The two cross beam square tubes 2.7 are arranged in parallel and spaced between the two "J"-shaped steel plates 2.6. Each cross beam square tube 2.7 is a door frame-shaped structure and its two lower ends are symmetrically welded to the corresponding longitudinal beam square tubes 2.4. The top of the crossbeam square tube 2.7 is convex on 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 spaced between the two longitudinal beam square tubes 2.4. Each longitudinal butt-jointed square tube 2.5 is vertically welded and fixed to the corresponding crossbeam square tube 2.7. The AGV positioning crossbeam is arranged in parallel between the crossbeam 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 carrier receiving plate 2.3 is fixedly connected to the AGV positioning crossbeam. The two longitudinal butt-jointed square tubes 2.5 are symmetrically provided with through AGV positioning pin holes 2.1. The sled carrier bracket 2.2 is fixedly connected to any one of the "X"-shaped steel plates 2.6.

[0072] The skid body 2 also includes two wear-resistant steel plates 2.9. The shape and size of each wear-resistant steel plate 2.9 matches the lower end surface of the longitudinal beam square tube 2.4 and both ends thereof are provided with upward bends. The two wear-resistant steel plates 2.9 are respectively matched and welded to the lower end surface of the corresponding longitudinal beam square tube 2.4.

[0073] The hanger 1 includes a hanger body 1.1, and 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 formed by welding four horizontal square tubes 1.113 to each other to form a horizontal rectangular frame. 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 faces of the skid body 2 and the four fixed points are sequentially connected to form a rectangle. The top hanger 1.111 is horizontally matched and fixedly connected to the top end faces of the four longitudinal square tubes 1.121. The middle hanger 1.112 is matched and fixedly connected to the middle of the four longitudinal square tubes 1.121 and is parallel to the top hanger 1.111.

[0074] The hook assembly 3 includes 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 are welded to the top rack 1.111 and the middle rack 1.112 respectively. 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 symmetrically welded to the left and right side walls of the reinforced short tube 3.111 respectively. Each pair of reinforced hooks 3.11 is symmetrically welded to the top rack 1.111 / The middle-level hanger 1.112 is provided with two parallel horizontal square tubes 1.113 with hook tips facing upwards. Two groups of first column hook assemblies 3.2 are respectively welded on the longitudinal square tubes 1.121 connected to the top-level hanger 1.111 and the middle-level hanger 1.112. Each group of column group hook assemblies includes eight hooks 3.112. The eight hooks 3.112 are respectively welded in groups of two on 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 reinforcement hooks 3.11.

[0075] The skid 2 also includes four groups of EMS hanging point components 2.10, which are evenly spaced and fixedly connected to the upper end surfaces of the two longitudinal beam square tubes 2.4 and are symmetrical in pairs. Each group of EMS hanging point components 2.10 includes a hook 2.11 for fixing an EMS sling, 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 sling 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, and the reinforcing plate 2.13 is vertically welded to the fixing plate 2.12.

[0076] The skid body 2 further comprises four longitudinal beam sealing reinforcement plates 2.14, each longitudinal beam sealing reinforcement plate 2.14 is a rectangular plate matching the cross section of the two ends 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 ends of the two longitudinal beam square tubes 2.4.

[0077] The hanger structure in this embodiment is a primer hanger structure.

[0078] Embodiment 2:

[0079] See Figure 2 As shown, a bumper painting rack includes a rack 1, a skid 2 and a hook assembly 3. The main structure of the rack 1 is a rectangular frame structure. The bottom of the rack 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, including an AGV locating pin hole 2.1, a sled carrier bracket 2.2 and an AGV carrier receiving plate 2.3. The hook assemblies 3 are fixedly connected to different positions of the rack 1 for mounting different types of bumpers.

[0080] The skid body 2 includes two longitudinal beam square tubes 2.4, two longitudinal butt-jointed square tubes 2.5, two "J"-shaped steel plates 2.6, two cross beam square tubes 2.7 and an AGV positioning cross beam square tube 2.8. The two "J"-shaped steel plates 2.6 are respectively vertically fixed 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 on the upper end surface of the longitudinal beam square tube 2.4. The two cross beam square tubes 2.7 are arranged in parallel and spaced between the two "J"-shaped steel plates 2.6. Each cross beam square tube 2.7 is a door frame-shaped structure and its two lower ends are symmetrically welded to the corresponding longitudinal beam square tubes 2.4. The top of the crossbeam square tube 2.7 is convex on 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 spaced between the two longitudinal beam square tubes 2.4. Each longitudinal butt-jointed square tube 2.5 is vertically welded and fixed to the corresponding crossbeam square tube 2.7. The AGV positioning crossbeam is arranged in parallel between the crossbeam 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 carrier receiving plate 2.3 is fixedly connected to the AGV positioning crossbeam. The two longitudinal butt-jointed square tubes 2.5 are symmetrically provided with through AGV positioning pin holes 2.1. The sled carrier bracket 2.2 is fixedly connected to any one of the "X"-shaped steel plates 2.6.

[0081] The skid body 2 also includes two wear-resistant steel plates 2.9. The shape and size of each wear-resistant steel plate 2.9 matches the lower end surface of the longitudinal beam square tube 2.4 and both ends thereof are provided with upward bends. The two wear-resistant steel plates 2.9 are respectively matched and welded to the lower end surface of the corresponding longitudinal beam square tube 2.4.

[0082] The hanger 1 includes a hanger body 1.1, and 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 formed by welding four horizontal square tubes 1.113 to each other to form a horizontal rectangular frame. 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 faces of the skid body 2 and the four fixed points are sequentially connected to form a rectangle. The top hanger 1.111 is horizontally matched and fixedly connected to the top end faces of the four longitudinal square tubes 1.121. The middle hanger 1.112 is matched and fixedly connected to the middle of the four longitudinal square tubes 1.121 and is parallel to the top hanger 1.111.

[0083] The hanger 1 also includes an auxiliary support 1.2, which includes two trapezoidal support beams 1.21 and two auxiliary support beams 1.22. Each trapezoidal support beam 1.21 is welded to each other by two short square tubes 1.211 and one rectangular tube 1.212 to form an isosceles trapezoidal frame without a bottom. The two trapezoidal support beams 1.21 are symmetrically welded horizontally to the left and right sides of the top hanger 1.111 to form a horizontal polygonal frame. The two auxiliary support beams 1.22 are respectively welded to the middle hanger 1.112 below the corresponding trapezoidal support beams 1.21. Each auxiliary support beam 1.22 is composed of two parallel and spaced auxiliary support beam short square tubes 1.221 welded to the top of an auxiliary support beam rectangular tube 1.222 and the middle of the auxiliary support beam rectangular tube 1.222 to form an approximately U-shaped frame structure. The two short square tubes of each auxiliary support beam 1.22 are welded to the outer wall of the horizontal square tube 1.113 corresponding to the middle hanger 1.112.

[0084] The hook assembly 3 includes a top hook assembly 3.3, two groups of second column hook assemblies 3.4 and an auxiliary beam hook assembly 3.5. The top hook assembly 3.3 includes a plurality of hooks. Two hooks 3.112 are evenly welded on the outer wall of each square tube of the top hanger 1.111 and the two trapezoidal support beams 1.21, and each hook tip faces upward. The auxiliary beam hook assembly 3.5 includes a plurality of L-shaped hooks 3.51. L-shaped hooks 3.51 are respectively welded at both ends of the rectangular tube 1.222 of each auxiliary support beam, and the hook tip faces upward. Two L-shaped hooks 3.51 are also welded at intervals on the rectangular tube 1.212 of each trapezoidal support beam 1.21, and the hook tip faces upward. Each group of second column group hook assemblies includes four hooks 3.112. The four hooks 3.112 are respectively welded on the side walls of four longitudinal square tubes 1.121 connected to the top hanger 1.111 / middle hanger 1.112, and each hook faces outside the longitudinal square tube 1.121 and the hook tip faces upward.

[0085] The skid body 2 further comprises four longitudinal beam sealing reinforcement plates 2.14, each longitudinal beam sealing reinforcement plate 2.14 is a rectangular plate matching the cross section of the two ends 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 ends of the two longitudinal beam square tubes 2.4.

[0086] This embodiment is a structure of a topcoat hanger. The requirements for the primer coating process and the topcoat coating process are different. The topcoat coating process requires that the bumper is mounted on the topcoat hanger without blocking each other. Therefore, the structures of the topcoat hanger and the primer hanger are different. It is necessary to add an auxiliary bracket 1.2 to the hanger body 1.1, and in order to ensure the stability of the paint hanger during transportation after the bumper is mounted, the position and angle of the fixed connection between the hanger body 1.1 and the skid body 2 are changed, and a reinforcing steel plate is installed at the corresponding position.

[0087] Embodiment 3:

[0088] The present invention also provides a method for using the bumper coating rack, comprising the following steps:

[0089] 1. The steps for applying primer using the bumper painting rack are as follows: Figure 3 and Figure 4 As shown:

[0090] S10, placing the bumper painting rack on the rack support platform, each bumper to be painted ( Figure 3 and Figure 4 The two mounting holes (not shown in the figure) of each bumper are respectively passed through a pair of reinforcing hooks 3.11 symmetrically arranged on two parallel horizontal square tubes of the top rack 1.111 / middle rack 1.112 by hand, with the hook tips of the reinforcing hooks 3.11 facing upwards. After all the bumpers are mounted, all the bumpers are horizontally spaced between the two parallel horizontal square tubes 1.113 of the top rack 1.111 / middle rack 1.112;

[0091] S11, calling AGV 4 through the calling system;

[0092] S12, AGV 4 enters from the bottom of the support platform 5 where the bumper painting rack is placed according to the set route to directly below the bumper painting rack, and AGV 4 scans the QR code on the AGV tag receiving plate 2.3 of the bumper painting rack, and recognizes that the bumper painting rack is a primer rack;

[0093] S13, a transfer support frame 4.1 is provided on the upper part of the AGV 4, the 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 hanger, and the positioning pin 4.2 is inserted into the AGV positioning pin hole 2.1 from below to realize the limit fixing of the bumper coating hanger on the top surface of the transfer support frame 4.1 of the AGV 4;

[0094] S14, AGV 4 lifts the bumper painting rack and enters the loading area of ​​the primer process according to the set route. The tag mounted on the sled tag bracket 2.2 of the bumper painting rack is identified and docked by the sled system. The transfer support frame 4.1 of AGV4 is lowered, and the positioning pin 4.2 is separated from the AGV positioning pin hole 2.1. The bumper painting rack is transferred from the transfer support frame 4.1 of AGV 4 into the sled system, realizing the movement of the bumper painting rack on the sled system.

[0095] S15, AGV 4 returns to the parking area according to the set route and waits for orders;

[0096] 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 coating hanger is wrapped by the EMS hanger for pre-treatment and electrophoresis;

[0097] 2. Steps for applying topcoat using the bumper painting hanger, see Figure 5 and Figure 6 As shown:

[0098] S20, using the bumper painting rack with trapezoidal support beam 1.21 and auxiliary support beam 1.22, placing it on the rack support platform 5, according to the bumper ( Figure 5 and Figure 6 The bumpers with different shapes (not shown in the figure) that have been painted with primer are manually installed with suitable top hook components 3.3, two sets of first column hook components 3.2, and auxiliary beam hook components 3.5, and the installation positions ensure that all bumpers will not affect the painting of topcoat.

[0099] S21, calling AGV 4 through the calling system;

[0100] S22, AGV 4 enters from the bottom of the support platform 5 where the bumper painting rack is placed according to the set route to directly below the bumper painting rack, and AGV 4 scans the QR code on the AGV tag receiving plate 2.3 of the bumper painting rack to identify that the bumper painting rack is a topcoat rack;

[0101] S23, a transfer support frame 4.1 is provided on the upper part of the AGV 4, the 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 hanger, and the positioning pin 4.2 is inserted into the AGV positioning pin hole 2.1 from below to realize the limit fixing of the bumper coating hanger on the top surface of the transfer support frame 4.1 of the AGV 4;

[0102] S24, AGV 4 lifts the bumper painting rack and enters the loading area of ​​the topcoat process according to the set route. The tag mounted on the sled tag holder 2.2 of the bumper painting rack is recognized and docked by the sled system. The transfer support frame 4.1 of AGV4 is lowered, and the positioning pin 4.2 is separated from the AGV positioning pin hole 2.1, so that the bumper painting rack moves on the sled system.

[0103] S25. AGV 4 returns to the parking area according to the set route and waits.

[0104] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A bumper painting rack, characterized in that: The invention comprises a hanger (1), a skid (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 skid (2); the skid (2) is a rectangular frame structure with a middle portion vertically protruding upward, comprising an AGV positioning pin hole (2.1), a sled tag carrier bracket (2.2) and an AGV tag 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.

2. The bumper painting rack according to claim 1, characterized in that: The skid body (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 (2.8). The two "X"-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 "X"-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 "X"-shaped steel plate (2.6) is convex from the upper end surface 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 "X"-shaped steel plates (2.6). Each cross beam square tube (2.7) is a door frame-shaped structure and its two lower ends are symmetrically welded to the corresponding longitudinal beam square tubes (2.4). The top of the cross beam square tube (2.7) is convex to the upper end surface of the longitudinal beam square tube (2.4); two longitudinal butt-jointed square tubes (2.5) are arranged in parallel and spaced apart between the two longitudinal beam square tubes (2.4); each longitudinal butt-jointed 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-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 "J"-shaped steel plates (2.6).

3. The bumper painting rack according to claim 2, characterized in that: The skid body (2) further comprises two wear-resistant steel plates (2.9), each of the wear-resistant steel plates (2.9) having a shape and size matching the lower end surface of the longitudinal beam square tube (2.4) and having upward bends at both ends, and the two wear-resistant steel plates (2.9) are respectively matched and welded to the lower end surface of the corresponding longitudinal beam square tube (2.4).

4. The bumper painting rack according to claim 3, characterized in that: 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 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) comprises a plurality of horizontal square tubes (1.113) and a plurality of vertical square tubes (1.114). The invention 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 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), and 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).

5. The bumper painting rack according to claim 4, characterized in that: The rack (1) further comprises an auxiliary bracket (1.2), wherein 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) being welded together by two short square tubes (1.211) and one rectangular tube (1.212) to form an isosceles trapezoidal frame without a bottom, the two trapezoidal support beams (1.21) being symmetrically welded horizontally to the left and right sides of the top rack (1.111) to form a horizontal polygonal frame, and the two auxiliary support beams (1.22) being welded horizontally to the left and right sides of the top rack (1.111) to form a horizontal polygonal frame. The support beams (1.22) are respectively welded to the middle-layer hangers (1.112) below the corresponding trapezoidal support beams (1.21); each auxiliary support beam (1.22) is composed of two parallel and spaced auxiliary support beam short square tubes (1.221) welded to the top of an auxiliary support beam long square tube (1.222) in the middle to form an approximately U-shaped frame structure; 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 hanger (1.112).

6. The bumper painting rack according to claim 4, characterized in that: 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) are respectively welded to the top-level hanger (1.111) and the middle-level hanger (1.112). Each group of reinforced hook assemblies (3.1) comprises a plurality of pairs of reinforced hooks (3.11). Each reinforced hook (3.11) comprises 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 side walls of the reinforced short tube (3.111). Each pair of reinforced hooks (3.11) is respectively symmetrically welded to the top-level hanger (1.111). The two sets 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), and the hook tips are upward. Each set of column group hook assemblies includes eight hooks (3.112). The eight hooks (3.112) are respectively welded 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) in groups of two and are arranged in the same direction as the adjacent reinforcing hooks (3.11).

7. The bumper painting rack according to claim 6, characterized in that: The skid body (2) further comprises four groups of EMS hanging point assemblies (2.10), the four groups of EMS hanging point assemblies (2.10) being evenly spaced and fixedly connected to the upper end surfaces of the two longitudinal beam square tubes (2.4) and symmetrical in pairs, each group of the EMS hanging point assemblies (2.10) comprising an EMS sling 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) being welded and fixed to the upper end surface of the longitudinal beam square tube (2.4) and one end extending out of the two longitudinal beam square tubes (2.4), the bottom of the EMS sling fixing hook (2.11) being welded to the upper end surface of the fixing plate (2.12) extending out of the longitudinal beam square tube (2.4), and the reinforcing plate (2.13) being vertically welded to the fixing plate (2.12).

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

9. The bumper painting rack according to any one of claims 1 to 8, 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 matching the cross-section 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).

10. A method for using a bumper painting rack, characterized in that: The steps include: (I) Steps of using the bumper painting rack to apply primer: S10, placing the bumper painting rack on the rack support platform, each bumper to be painted comprises two left and right mounting holes, manually passing the two mounting holes of each bumper through a pair of reinforcing hooks (3.11) symmetrically arranged on two parallel horizontal square tubes of the top rack (1.111) / middle rack (1.112), with the hook tips of the reinforcing hooks (3.11) facing upwards, and after all the bumpers are mounted, all the 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 through the calling system (4); S12, the AGV (4) enters from the bottom of the support platform (5) on which the bumper painting rack is placed to the bottom of the bumper painting rack according to the set route, and the AGV (4) scans the QR code on the AGV code carrier receiving plate (2.3) of the bumper painting rack to identify that the bumper painting rack is a primer rack; S13, a transfer support frame (4.1) is arranged on the upper part of the AGV (4), a support bracket on the transfer support frame is connected to the longitudinal butt-jointed square tube (2.5), a positioning pin (4.2) is arranged in the middle of the support bracket, the transfer support frame of the AGV (4) rises to support the longitudinal butt-jointed 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 realize the limit fixing of the bumper coating rack on the top surface of the transfer support frame of the AGV (4); S14, the AGV (4) lifts the bumper painting rack and enters the loading area of ​​the primer process according to the set route. The code body installed on the sled code body bracket (2.2) of the bumper painting rack is identified and docked with 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 painting rack is transferred from the transfer support frame (4.1) of (4) into the sled system, so that the movement of the bumper painting rack on the sled system is realized; 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; (ii) Steps of applying topcoat using the bumper painting rack: S20, using the bumper painting hanger provided with a trapezoidal support beam (1.21) and an auxiliary support beam (1.22), placing it on the hanger support platform (5), manually selecting suitable top hook components (3.3), two groups of first column hook components (3.2), and auxiliary beam hook components (3.5) to hang the bumpers that have been painted with primer according to the different shapes of each bumper, and the hanging positions ensure that all bumpers will not affect the painting of topcoats; S21, calling the AGV through the calling system (4); S22, the AGV (4) enters from the bottom of the support platform (5) on which the bumper painting rack is placed to the bottom of the bumper painting rack according to the set route, and the AGV (4) scans the QR code on the AGV code carrier receiving plate (2.3) of the bumper painting rack to identify that the bumper painting rack is a rack for topcoat; S23, a transfer support frame is arranged on the upper part of the AGV (4), a support bracket on the transfer support frame is connected to the longitudinal butt-jointed square tube (2.5), a positioning pin (4.2) is arranged in the middle of the support bracket, the transfer support frame of the AGV (4) rises to support the longitudinal butt-jointed square tube (2.5) of the bumper coating hanger, and the positioning pin (4.2) is inserted into the AGV positioning pin hole (2.1) from below to realize the limit fixing of the bumper coating hanger on the top surface of the transfer support frame of the AGV; 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 body installed on the sled code body bracket (2.2) of the bumper coating rack is recognized 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, so that the bumper coating rack can move on the sled system; S25. AGV (4) returns to the parking area according to the set route and waits for further instructions.

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