A kind of automobile protection crossbeam assembly electrophoresis tool and method for using

Abstract

This invention belongs to the field of electrophoretic coating technology and discloses an electrophoretic tooling fixture and its usage method for automotive protective beam assemblies. It includes an electrophoretic hanger and a lifting device. The electrophoretic hanger comprises a base, a vertical frame, and a support hanger assembly. Two bottom longitudinal beams are arranged parallel and spaced apart, with both ends of the bottom longitudinal beams able to be inserted into the mesh of the electrophoretic frame for fixation. Two vertical columns of the vertical frame are arranged parallel and spaced apart, and multiple crossbeams are fixed parallel and spaced apart on the two vertical columns. The columns are vertically fixed to the middle of the bottom longitudinal beams. The support hanger assembly is symmetrically arranged on the front and rear surfaces of each crossbeam at the connection point with the column. The lifting device includes a hook and an adjustable clamping device. The protective beam assembly is lifted by being fixedly mounted on the electrophoretic hanger. This invention improves the full-load rate within the electrophoretic frame, reduces manual labor intensity and loading / unloading time through transportation and unloading via the lifting device, improves operational convenience and safety, solves the defect of paint accumulation inside the cavity, and improves electrophoretic quality.

Description

Technical Field

[0001] This invention belongs to the field of electrophoretic coating technology, specifically relating to an electrophoretic tooling for automotive protective beam assemblies and its application method. Background Technology

[0002] In the production and manufacturing process of heavy trucks, the protective beam assembly is a core component that ensures the driving safety of the vehicle. The quality of its surface anti-corrosion treatment directly determines the service life of the component and the safety performance of the whole vehicle. Electrophoretic coating is currently the most mainstream and effective anti-corrosion treatment method for heavy truck protective beam assemblies. It can significantly improve the corrosion resistance of the components and meet the usage requirements of commercial vehicles under complex working conditions.

[0003] Currently, in the domestic heavy truck manufacturing industry, there are significant limitations in the electrophoretic treatment of protective beam assemblies: if the protective beam is electrophoretically treated as a whole along with the chassis assembly, the complex structure and large size of the chassis assembly can easily lead to problems such as uneven electric field distribution and poor paint circulation during the electrophoresis process, resulting in defects such as uneven paint film thickness and missed coating on the surface of the protective beam. Moreover, this process has extremely high requirements for electrophoresis equipment and tank parameters, which greatly increases the difficulty of the production process and manufacturing costs. Therefore, this method has not been widely adopted by the industry.

[0004] Given the aforementioned practical limitations, most companies generally adopt two electrophoresis process solutions: First, electrophoresis is performed on each individual component of the protective beam before assembly; second, the entire protective beam assembly is electrophoretically treated. While the method of electrophoresis on individual components before assembly reduces the difficulty of electrophoresis on individual parts, the assembly process can cause scratches and wear to the already formed paint film, damaging the integrity of the anti-corrosion layer. It also increases the process costs of transporting and assembling individual components, and the interlayer at the joints is prone to rust after assembly, affecting the overall anti-corrosion effect. On the other hand, while the method of electrophoresis on the entire protective beam assembly avoids damage to the paint film during assembly, it faces more significant challenges in installation and operation.

[0005] The inherent structural characteristics of the heavy-duty truck protective beam assembly determine the difficulty of its electrophoretic coating installation: this assembly weighs approximately 50 kg and can reach a length of about 2.5 meters, making it a typical long and heavy workpiece. Its structure often includes irregular shapes such as concave arc surfaces, which greatly inconveniences workers during electrophoretic coating installation and disassembly, significantly increasing their labor intensity. Currently, there is no mature, efficient, and safe solution in the industry for the electrophoretic coating installation of such heavy assemblies. Companies generally employ two crude operating methods, both of which have obvious drawbacks.

[0006] The first method involves manual lifting and stacking, where two or more workers work together to lift the heavy protective beam assembly onto the electrocoating equipment and stack it. This method is not only labor-intensive, but also poses a high risk of accidents such as slipping and collisions due to the weight and instability of the workpiece during lifting. Furthermore, stacking can cause the contact areas of the workpiece to be compressed, preventing sufficient contact with the paint during electrocoating. This results in noticeable indentations after electrocoating, requiring additional post-electrophoresis repairs. This not only increases labor costs but also increases the risk of corrosion damage due to inadequate repairs, affecting the overall quality of the paint film.

[0007] The second operating method is a double-single-hook low-height mounting, which uses two independent single hooks to suspend and fix the protective beam assembly at a low height. While this method reduces the safety risks of manual lifting to some extent, it has several process defects: First, the two-single-hook mounting method requires a large amount of mounting space, resulting in a significant decrease in the space utilization rate of the electrophoresis mounting fixture, reducing the number of workpieces that can be electrophoresed in a single cycle, and thus affecting production efficiency; second, when mounted with a single hook, the concave arc surface of the protective beam is facing upwards, making it easy for paint to accumulate in the cavity during electrophoresis. Furthermore, the ultrafiltrate does not flow smoothly after electrophoresis, and the drainage time is too long, which can easily lead to defects such as paint accumulation and paint film sagging in the cavity, seriously affecting the uniformity and adhesion of the paint film after electrophoresis, and failing to meet the anti-corrosion quality requirements of the heavy truck protective beam assembly.

[0008] In summary, the current electrophoretic coating process for heavy-duty truck protective beam assemblies, whether using individual component electrophoresis followed by assembly or overall assembly electrophoresis, has insurmountable drawbacks. In particular, the assembly stage of overall assembly electrophoresis has long been plagued by a triple dilemma of low efficiency, poor quality, and high risk. It cannot meet the efficiency requirements of large-scale production, nor can it guarantee the electrophoretic quality of the protective beam assembly and the safety of production operations, thus restricting the upgrading and optimization of the heavy-duty truck protective beam production process. Therefore, there is an urgent need for an electrophoretic coating solution that can solve the above-mentioned pain points. Summary of the Invention

[0009] The purpose of this invention is to provide an electrophoresis fixture and method for using automotive protective beam assemblies. The electrophoresis hanger significantly improves the full load rate within the electrophoresis frame. The use of a lifting device throughout the transportation and loading / unloading process reduces the labor intensity of workers, significantly shortens loading / unloading time, improves the convenience and safety of operation, solves the process defect of paint accumulation inside the cavity, and improves the quality of electrophoresis.

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

[0011] An electrophoresis fixture for automotive protective beam assemblies is used for mounting and transporting the protective beam assembly before electrophoresis. It includes an electrophoresis hanger and a lifting device. The electrophoresis hanger is a multi-layered three-dimensional frame structure, including a base, uprights, and supporting hanger assemblies. The base includes two parallel, spaced-apart bottom longitudinal beams, the ends of which can be inserted into the lower mesh of the electrophoresis frame for limiting and fixing. The uprights include two parallel, spaced-apart columns and multiple crossbeams. The multiple crossbeams are parallel and spaced-apart vertically fixed to the two columns, and the two columns are respectively vertically fixed to the middle of the two bottom longitudinal beams. The supporting hanger assemblies are symmetrically arranged on the front and rear facades at the connection between the columns and crossbeams, allowing the protective beam assembly to be mounted on both sides of each crossbeam. The lifting device includes a hook and an adjustable clamping device. The hook is mounted on the adjustable clamping device, and the clamping part of the adjustable clamping device is adjustable to match the thickness of the protective beam assembly, so as to fix the protective beam assembly and lift it by an overhead crane.

[0012] The electrophoresis fixture for automotive protective beam assemblies of this invention comprises two parts: an electrophoresis hanger and a lifting device. These two parts work together. The electrophoresis hanger is a symmetrical, multi-layered, three-dimensional frame structure. One protective beam assembly can be mounted on each side of each beam, significantly increasing the full load rate within the electrophoresis frame. The bottom of the electrophoresis hanger includes two bottom longitudinal beams. Both ends of each bottom longitudinal beam can be inserted into the mesh at the bottom of the electrophoresis frame for positioning and fixation. The four ends of the two bottom longitudinal beams, in conjunction with the mesh at the bottom of the electrophoresis frame, secure the entire electrophoresis hanger within the frame. Then, using an overhead crane and the lifting device, the protective beam assemblies are fixed to the lifting device, and the protective beam assemblies are transported one by one from the raw material area to the electrophoresis hanger within the electrophoresis frame for mounting. This reduces the labor intensity of workers and improves operational safety. The protective beam assembly has a cross-shaped reference hole on its concave arc. When installing the protective beam assembly, the concave arc of the assembly is placed on the electrophoresis rack with the concave arc facing downwards. The reference hole is aligned with the cross-shaped positioning base at the fixed position and inserted into the electrophoresis rack. This solves the problem of paint accumulation defects in the inner cavity caused by the concave arc of the protective beam assembly facing upwards in the prior art, thus improving the electrophoresis quality. The lifting device is an adjustable fixing clamping device with a hook. Preferably, the adjustable fixing clamping device is a movable jaw structure. By adjusting the opening size of the upper jaw and the lower jaw to match the protective beam assembly, the two can form an approximately circular structure after being engaged, which can fix the protective beam assembly within the upper jaw and the lower jaw. Furthermore, it is fixedly connected to the crane wire by the annular hook connected to the top of the adjustable fixing clamping device. The crane transports the protective beam assembly to the electrophoresis frame for installation. After the electrocoating hanger is fully loaded with the protective beam assemblies, the lifting device is removed, and the overhead crane transports the electrocoating frame, containing the electrocoating hanger and the installed protective beam assemblies, to the roller bed positioning point at the electrocoating station for electrocoating. Then, the overhead crane places the electrocoating frame in the post-coating storage area, and the protective beam assembly is then moved to the inspection area using the protective beam assembly lifting device. This system reduces the labor intensity of workers, significantly shortens loading and unloading time, and improves operational convenience and safety throughout the entire transportation and loading / unloading process.

[0013] Furthermore, the base includes a first bottom longitudinal beam and a second bottom longitudinal beam, which are arranged parallel to each other on a horizontal plane. The upright includes a first column, a second column, a first crossbeam, a second crossbeam, and a third crossbeam. The first column is vertically fixed to the middle of the first bottom longitudinal beam, and the second column is vertically fixed to the middle of the second bottom longitudinal beam. The first, second, and third crossbeams are fixed parallel to each other from top to bottom between the first and second columns and are all perpendicular to the first and second columns. The support bracket assemblies are symmetrically arranged on the first and second columns between the first crossbeam, the second crossbeam, the third crossbeam, the first bottom longitudinal beam, and the second bottom longitudinal beam.

[0014] Furthermore, the support bracket assembly includes four sets of upper support brackets and two sets of lower support brackets. The four sets of upper support brackets are symmetrically fixed to the first and second columns between two adjacent crossbeams, and all four sets of upper support brackets are perpendicular to the crossbeams.

[0015] Furthermore, each set of upper support brackets includes a first horizontal longitudinal support beam, a second horizontal longitudinal support beam, a first diagonal brace beam, and a second diagonal brace beam. The first and second horizontal longitudinal support beams are respectively fixedly connected to the front and rear facades of the connection between the first / second column and the crossbeam. The top surfaces of the first and second horizontal longitudinal support beams are flush with the top surfaces of the adjacent crossbeams. The upper end face of the first diagonal brace beam is fixedly connected to the lower end face of the first horizontal longitudinal support beam, and the lower end face of the first diagonal brace beam is fixedly connected to the front end face of the column below the first horizontal longitudinal support beam. The upper end face of the second diagonal brace beam is fixedly connected to the lower end face of the second horizontal longitudinal support beam, and the lower end face of the second diagonal brace beam is fixedly connected to the rear end face of the column below the second horizontal longitudinal support beam. The first and second diagonal braces form a V-shaped structure. Both the first and second horizontal longitudinal support beams are provided with cross-shaped positioning bases for positioning and insertion with the cross reference holes on the concave arc of the protective crossbeam assembly.

[0016] Furthermore, each set of upper support brackets also includes a first upper limit support beam and a second upper limit support beam. Both the first upper limit support beam and the second upper limit support beam include a short horizontal beam and a short vertical beam. The short horizontal beam and the short vertical beam are horizontally arranged and the short vertical beam is vertically fixed to one end of the short horizontal beam. The first upper limit support beam and the second upper limit support beam are symmetrically fixed to the outer surfaces of the first diagonal brace beam and the second diagonal brace beam, and the short vertical beams of the two beams face opposite directions.

[0017] Furthermore, the two sets of lower support brackets are symmetrically fixed on the first and second columns between the third crossbeam and the bottom longitudinal beam, and both sets of lower support brackets are perpendicular to the third crossbeam.

[0018] Furthermore, each set of lower support brackets includes a third horizontal longitudinal support beam, a fourth horizontal longitudinal support beam, a first vertical support beam, and a second vertical support beam. The third and fourth horizontal longitudinal support beams are respectively fixedly connected to the front and rear facades of the connection point between the first / second column and the third crossbeam. The upper surfaces of the third and fourth horizontal longitudinal support beams are flush with the upper surface of the third crossbeam. The first vertical support beam is vertically fixed between the third horizontal longitudinal support beam and the first / second bottom longitudinal beam. The second vertical support beam is vertically fixed between the fourth horizontal longitudinal support beam and the first / second bottom longitudinal beam. Both the third and fourth horizontal longitudinal support beams are provided with cross-shaped positioning bases for positioning and insertion with the cross reference holes on the concave arc of the protective crossbeam assembly.

[0019] Furthermore, each set of lower support brackets also includes two lower limit support beams. One end of the two lower limit support beams is symmetrically fixed to the outer surface of the first vertical support beam and the second vertical support beam, respectively. The lower limit support beams and the beams are in the same direction.

[0020] Furthermore, the hook is a ring hook, and the adjustable clamping device includes an upper jaw, a lower jaw, a nut, a limiting screw, a limiting pin, and a fixing pin. The upper part of the ring hook has a circular through hole, and the lower part has a hook. The top of the upper jaw has a circular hook that matches the hook at the bottom of the ring hook. The upper part of the upper jaw has a circular through hole, and the nut is welded and fixed in the circular through hole. The upper jaw and the lower jaw are hinged by the fixing pin. The limiting pin can be inserted and fixed to the upper jaw and the lower jaw for limiting and locking the upper jaw and the lower jaw. The limiting screw can be threaded into the nut and exposed outside the nut for fixed connection with the hole on the protective beam assembly.

[0021] A method for using the aforementioned electrophoresis fixture for automotive protective beam assembly includes the following steps:

[0022] S1. The worker places the electrophoresis hanger inside the electrophoresis frame and inserts both ends of the bottom longitudinal beam into the mesh below the electrophoresis frame to fix the electrophoresis hanger inside the electrophoresis frame.

[0023] S2. In the raw material area where the protective beam assembly is stored, hinge the upper and lower jaws of the lifting device using a fixing pin. Screw the limit pin into the nut of the upper jaw and leave it in a loose state. Connect the circular through hole at the top of the ring hook to the overhead crane wire. Hook the lower hook of the ring hook onto the circular hook at the top of the upper jaw. Engage the upper jaw into the upper surface of the protective beam assembly, then close the lower jaw. Lock the upper and lower jaws using the limit pin, and screw the limit pin into the nut to lock it in place and push it into the corresponding hole on the protective beam assembly. Perform the lifting operation, transporting the protective beam assemblies one by one to the electrophoresis rack in the electrophoresis frame for installation. Place the protective beam assembly along the beam direction on the electrophoresis rack. On the frame, when installing, make sure the concave arc surface of the protective beam assembly faces downward. Align the cross reference hole on the concave arc surface of the protective beam assembly with the cross-shaped positioning base at the corresponding position and insert and fix it. At this time, the mounting bracket of the protective beam assembly is supported on the corresponding first upper limit support beam / second upper limit support beam / lower limit support beam. After the protective beam assembly is installed, the lifting device is disassembled. Unscrew the limit screw, then remove the limit pin. After the lower jaws open, the lifting device can be removed from the protective beam assembly. The overhead crane and the lifting device return to the raw material area to retrieve the material. Repeat the previous operation until the entire electrophoresis rack is full of protective beam assemblies. After the lifting device is removed, take it to the offline station for later use.

[0024] S3. The overhead crane delivers the electrophoresis frame, which is equipped with the electrophoresis bracket and protective beam assembly, to the positioning point of the roller bed in the electrophoresis station for electrophoresis.

[0025] S4. After electrophoresis is completed, the overhead crane transports the electrophoresis frame as a whole to the post-painting storage area. Then, with the help of the lifting device, the post-painting protective beam assembly is fixed and the post-painting protective beam assembly is sent to the inspection area one by one.

[0026] Compared with the prior art, the present invention has the following advantages:

[0027] 1. By using the electrophoresis hanger of the present invention, the full hanging rate of the protective beam assembly in the electrophoresis frame is greatly improved, thereby increasing production efficiency and reducing production costs.

[0028] 2. The use of lifting devices throughout the transportation and loading / unloading process reduces the labor intensity of workers, significantly shortens loading / unloading time, and improves the convenience and safety of operation.

[0029] 3. This design avoids the paint accumulation defects in the inner cavity caused by the previous method of using two single hooks to make the concave arc of the protective beam assembly face upwards, thus improving the electrophoresis quality. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the overall structure of the electrophoresis hanger of the present invention.

[0031] Figure 2 This is a schematic diagram of the overall structure of the lifting device of the present invention.

[0032] In the picture:

[0033] 1. Includes an electrophoresis hanger; 1.1. Base; 1.11. First bottom longitudinal beam; 1.12. Second bottom longitudinal beam; 1.2. Upright frame; 1.21. First upright; 1.22. Second upright; 1.23. First crossbeam; 1.24. Second crossbeam; 1.25. Third crossbeam; 1.3. Support hanger assembly; 1.31. Upper support hanger; 1.311. First horizontal longitudinal support beam; 1.312. Second horizontal longitudinal support beam; 1.313. First diagonal brace beam; 1.314. Second diagonal brace beam; 1.315. First upper limit support beam; 1.316. Second upper limit support beam. 1. Support beam; 1.317. Short crossbeam; 1.318. Short longitudinal beam; 1.32. Lower support bracket; 1.321. Third horizontal longitudinal support beam; 1.322. Fourth horizontal longitudinal support beam; 1.323. First vertical support beam; 1.324. Second vertical support beam; 1.325. Lower limit support beam; 2. Lifting device; 2.1. Hook; 2.2. Adjustable fixing clamping device; 2.21. Upper jaw; 2.22. Lower jaw; 2.23. Nut; 2.24. Limiting pin; 2.25. Limiting pin; 2.26. Fixing pin; 3. Cross-shaped positioning base. Detailed Implementation

[0034] To make the technical problems solved by the present invention, the technical solutions adopted, and the technical effects achieved clearer, the technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely for explaining the present invention and are not intended to limit the present invention. Furthermore, it should be noted that, for ease of description, only the parts related to the present invention are shown in the accompanying drawings, not all of them.

[0035] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The terms "first position" and "second position" refer to two different positions.

[0036] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections or detachable connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art can understand the specific meaning of these terms in this invention based on the specific circumstances.

[0037] The following combination Figure 1 and Figure 2 The present invention will be described in conjunction with the embodiments:

[0038] Example 1:

[0039] An electrophoresis fixture for automotive protective beam assemblies, used for mounting and transporting the protective beam assembly before electrophoresis, includes an electrophoresis bracket 1 and a lifting device 2. The electrophoresis bracket 1 is a multi-layer three-dimensional frame structure, see [link to documentation]. Figure 1 As shown, the device includes a base 1.1, a frame 1.2, and a support bracket assembly 1.3. The base 1.1 includes two parallel, spaced-apart bottom longitudinal beams, the ends of which can be inserted into the lower mesh of the electrophoresis frame for positioning and fixation. The frame 1.2 includes two parallel, spaced-apart uprights and multiple crossbeams. The crossbeams are parallel and spaced-apart vertically fixed to the two uprights. The two uprights are vertically fixed to the middle of the two bottom longitudinal beams. The support bracket assembly 1.3 is symmetrically arranged on the front and rear facades at the connection points between the uprights and crossbeams, allowing protective crossbeam assemblies to be mounted on both sides of each crossbeam. Figure 2 As shown, the lifting device 2 includes a hook 2.1 and an adjustable clamping device 2.2. The hook 2.1 is mounted on the adjustable clamping device 2.2. The clamping part of the adjustable clamping device 2.2 is adjustable to match the thickness of the protective beam assembly, so as to fix the protective beam assembly and lift it by an overhead crane.

[0040] The base 1.1 includes a first bottom longitudinal beam 1.11 and a second bottom longitudinal beam 1.12, which are arranged parallel to each other on a horizontal plane. The support frame 1.2 includes a first column 1.21, a second column 1.22, a first crossbeam 1.23, a second crossbeam 1.24, and a third crossbeam 1.25. The first column 1.21 is vertically fixed to the middle of the first bottom longitudinal beam 1.11, and the second column 1.22 is vertically fixed to the middle of the second bottom longitudinal beam 1.12. The first crossbeam 1.23, the second crossbeam 1.24, and the third crossbeam 1.25 are fixed in parallel and spaced apart from top to bottom between the first column 1.21 and the second column 1.22, and are all perpendicular to the first column 1.21 and the second column 1.22. The support bracket assembly 1.3 is symmetrically arranged on the first column 1.21 and the second column 1.22 between the first crossbeam 1.23, the second crossbeam 1.24, the third crossbeam 1.25, the first bottom longitudinal beam 1.11, and the second bottom longitudinal beam 1.12.

[0041] The support bracket assembly 1.3 includes four sets of upper support brackets 1.31 and two sets of lower support brackets 1.32. The four sets of upper support brackets 1.31 are symmetrically fixedly connected to the first column 1.21 and the second column 1.22 between two adjacent crossbeams, and all four sets of upper support brackets 1.31 are perpendicular to the crossbeams.

[0042] Each set of upper support brackets 1.31 includes a first horizontal longitudinal support beam 1.311, a second horizontal longitudinal support beam 1.312, a first diagonal brace beam 1.313, and a second diagonal brace beam 1.314. The first horizontal longitudinal support beam 1.311 and the second horizontal longitudinal support beam 1.312 are respectively fixedly connected to the front and rear facades of the fixed connection points between the first column 1.21 / second column 1.22 and the crossbeam. The top surfaces of the first horizontal longitudinal support beam 1.311 and the second horizontal longitudinal support beam 1.312 are flush with the top surfaces of the adjacent crossbeams. The upper end face of the first diagonal brace beam 1.313 is fixedly connected to the lower end face of the first horizontal longitudinal support beam 1.311. The lower end face of the diagonal bracing beam 1.313 is fixedly connected to the front end face of the column below the first horizontal longitudinal support beam 1.311. The upper end face of the second diagonal bracing beam 1.314 is fixedly connected to the lower end face of the second horizontal longitudinal support beam 1.312. The lower end face of the second diagonal bracing beam 1.314 is fixedly connected to the rear end face of the column below the second horizontal longitudinal support beam 1.312. The first diagonal bracing beam 1.313 and the second diagonal bracing beam 1.314 form a V-shaped structure. Both the first horizontal longitudinal support beam 1.311 and the second horizontal longitudinal support beam 1.312 are provided with cross-shaped positioning bases 3, which are used for positioning and insertion with the cross reference holes on the concave arc of the protective beam assembly.

[0043] Each set of upper support brackets 1.31 also includes a first upper limit support beam 1.315 and a second upper limit support beam 1.316. The first upper limit support beam 1.315 and the second upper limit support beam 1.316 each include a short horizontal beam 1.317 and a short longitudinal beam 1.318. The short horizontal beam 1.317 and the short longitudinal beam 1.318 are horizontally arranged and the short longitudinal beam 1.318 is vertically fixed to one end of the short horizontal beam 1.317. The first upper limit support beam 1.315 and the second upper limit support beam 1.316 are symmetrically fixed to the outer surfaces of the first diagonal brace beam 1.313 and the second diagonal brace beam 1.314, and the short longitudinal beams 1.318 of the two beams face opposite directions.

[0044] Two sets of lower support brackets 1.32 are symmetrically fixed on the first column 1.21 and the second column 1.22 between the third crossbeam 1.25 and the bottom longitudinal beam, and both sets of lower support brackets 1.32 are perpendicular to the third crossbeam 1.25.

[0045] Each set of lower support brackets 1.32 includes a third horizontal longitudinal support beam 1.321, a fourth horizontal longitudinal support beam 1.322, a first vertical support beam 1.323, and a second vertical support beam 1.324. The third horizontal longitudinal support beam 1.321 and the fourth horizontal longitudinal support beam 1.322 are respectively fixedly connected to the front and rear facades of the connection points between the first column 1.21 / second column 1.22 and the third crossbeam 1.25. The upper ends of both the third horizontal longitudinal support beam 1.321 and the fourth horizontal longitudinal support beam 1.322 are connected to the third crossbeam 1.25. The upper surface of 5 is flush with the first vertical support beam 1.323 is vertically fixed between the third horizontal longitudinal support beam 1.321 and the first bottom longitudinal beam 1.11 / second bottom longitudinal beam 1.12. The second vertical support beam 1.324 is vertically fixed between the fourth horizontal longitudinal support beam 1.322 and the first bottom longitudinal beam 1.11 / second bottom longitudinal beam 1.12. The third horizontal longitudinal support beam 1.321 and the fourth horizontal longitudinal support beam 1.322 are both provided with cross-shaped positioning bases 3, which are used to position and insert with the cross reference holes on the concave arc of the protective beam assembly.

[0046] Each set of lower support brackets 1.32 also includes two lower limit support beams 1.325. One end of the two lower limit support beams 1.325 on the same side is symmetrically fixed to the outer surface of the first vertical support beam 1.323 and the second vertical support beam 1.324, respectively. The lower limit support beams 1.325 and the beams are in the same direction.

[0047] The hook 2.1 is a ring hook, and the adjustable clamping device 2.2 includes an upper jaw 2.21, a lower jaw 2.22, a nut 2.23, a limiting pin 2.24, a limiting pin 2.25, and a fixing pin 2.26. The ring hook has a circular through hole at the top and a hook at the bottom. The top of the upper jaw 2.21 has a circular hook that matches the hook at the bottom of the ring hook. The upper part of the upper jaw 2.21 has a circular through hole, and the nut 2.26... 3. Welded and fixed in the circular through hole, the upper jaw 2.21 and the lower jaw 2.22 are hinged by the fixing pin 2.26. The limiting pin 2.25 can be inserted and fixed on the upper jaw 2.21 and the lower jaw 2.22 for limiting and locking the upper jaw 2.21 and the lower jaw 2.22. The limiting screw pin 2.24 can be threaded into the nut 2.23 and exposed outside the nut 2.23 for fixed connection with the hole on the protective beam assembly.

[0048] Example 2:

[0049] The present invention also provides a method for using the aforementioned electrophoresis fixture for automotive protective beam assembly, the steps of which include:

[0050] S1. The worker places the electrophoresis hanger 1 inside the electrophoresis frame and inserts both ends of the bottom longitudinal beam into the mesh below the electrophoresis frame to limit and fix the electrophoresis hanger 1 inside the electrophoresis frame.

[0051] S2. In the raw material area where the protective beam assembly is stored, the upper jaw 2.21 and lower jaw 2.22 of the lifting device 2 are hinged together by the fixing pin 2.26. The limiting screw 2.24 is screwed into the nut 2.23 of the upper jaw 2.21 and placed in a loose state. The circular through hole at the top of the ring hook is connected to the overhead crane wire. The hook at the bottom of the ring hook is hooked onto the circular hook at the top of the upper jaw 2.21. The upper jaw 2.21 is inserted into the upper surface of the protective beam assembly, and then the lower jaw 2.22 is engaged. The upper and lower jaws are locked using the limiting pin 2.25. The limiting screw 2.24 is screwed into the nut 2.23 and locked, and pushed into the corresponding hole on the protective beam assembly. The lifting operation is then carried out, and the protective beam assemblies are transported one by one to the electrophoresis hanger 1 in the swimming frame for installation, so that the protective beam assembly is along the beam. The protective beam assembly is placed on the electrophoresis hanger 1. When installing, the concave arc surface of the protective beam assembly faces downward. Align the cross reference hole on the concave arc surface of the protective beam assembly with the corresponding cross-shaped positioning base 3 and insert and fix it. At this time, the mounting bracket of the protective beam assembly is supported on the corresponding first upper limit support beam 1.315 / second upper limit support beam 1.316 / lower limit support beam 1.325. After the protective beam assembly is installed, the lifting device 2 is disassembled. The limit screw 2.24 is unscrewed, and then the limit pin 2.25 is removed. After the lower jaw 2.22 is opened, the lifting device 2 can be removed from the protective beam assembly. The crane and the lifting device 2 return to the raw material area to pick up materials. Repeat the previous operation until the entire electrophoresis hanger 1 is full of protective beam assemblies. After the lifting device 2 is removed, it is taken to the offline station for later use.

[0052] S3. The overhead crane delivers the electrophoresis frame, which is equipped with the electrophoresis bracket 1 and the protective beam assembly, to the positioning point of the roller bed in the electrophoresis station for electrophoresis.

[0053] S4. After electrophoresis is completed, the overhead crane transports the electrophoresis frame as a whole to the post-painting storage area. Then, in conjunction with the lifting device 2, the post-painting protective beam assembly is fixed and the post-painting protective beam assembly is sent to the inspection area one by one.

[0054] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An electrophoresis fixture for automotive protective beam assemblies, used for mounting and transporting the protective beam assemblies, characterized in that, The system includes an electrophoresis hanger (1) and a lifting device (2). The electrophoresis hanger (1) is a multi-layer three-dimensional frame structure, including a base (1.1), a support frame (1.2), and a support hanger assembly (1.3). The base (1.1) includes two parallel and spaced bottom longitudinal beams, the two ends of which can be inserted into the lower mesh of the electrophoresis frame for limiting and fixing. The support frame (1.2) includes two parallel and spaced columns and multiple horizontal beams. The multiple horizontal beams are parallel and spaced vertically fixed to the two columns, and the two columns are respectively vertically fixed to two... At the middle of the root bottom longitudinal beam, the support bracket assembly (1.3) is symmetrically arranged on the front and rear facades at the connection between the column and the beam, so that the protective beam assembly can be installed on both sides of each beam. The lifting device (2) includes a hook (2.1) and an adjustable fixing clamping device (2.2). The hook (2.1) is set on the adjustable fixing clamping device (2.2). The fixing clamping part of the adjustable fixing clamping device (2.2) is adjustable to match the thickness of the protective beam assembly so as to fix the protective beam assembly and lift it by the overhead crane.

2. The automotive cross-car protective beam assembly electrocoating fixture of claim 1, wherein, The base (1.1) includes a first bottom longitudinal beam (1.11) and a second bottom longitudinal beam (1.12), which are arranged parallel to each other on a horizontal plane. The upright (1.2) includes a first column (1.21), a second column (1.22), a first crossbeam (1.23), a second crossbeam (1.24), and a third crossbeam (1.25). The first column (1.21) is vertically fixed to the middle of the first bottom longitudinal beam (1.11), and the second column (1.22) is vertically fixed to the middle of the second bottom longitudinal beam (1.12). The first crossbeam (1.23), the second crossbeam (1.24), and the third crossbeam (1.25) are fixed in parallel and spaced apart from top to bottom between the first column (1.21) and the second column (1.22), and are all perpendicular to the first column (1.21) and the second column (1.22). The support bracket assembly (1.3) is symmetrically arranged on the first column (1.21) and the second column (1.22) between the first crossbeam (1.23), the second crossbeam (1.24), the third crossbeam (1.25), the first bottom longitudinal beam (1.11), and the second bottom longitudinal beam (1.12).

3. The electrophoresis fixture for automotive protective beam assembly according to claim 2, characterized in that, The support bracket assembly (1.3) includes four sets of upper support brackets (1.31) and two sets of lower support brackets (1.32). The four sets of upper support brackets (1.31) are symmetrically fixed to the first column (1.21) and the second column (1.22) between two adjacent crossbeams, and all four sets of upper support brackets (1.31) are perpendicular to the crossbeams.

4. The electrophoresis fixture for automotive protective beam assembly according to claim 3, characterized in that, Each set of upper support brackets (1.31) includes a first horizontal longitudinal support beam (1.311), a second horizontal longitudinal support beam (1.312), a first diagonal brace beam (1.313), and a second diagonal brace beam (1.314). The first horizontal longitudinal support beam (1.311) and the second horizontal longitudinal support beam (1.312) are respectively fixedly connected to the front and rear facades of the fixed connection between the first column (1.21) / second column (1.22) and the crossbeam. The top surfaces of the first horizontal longitudinal support beam (1.311) and the second horizontal longitudinal support beam (1.312) are flush with the top surfaces of the adjacent crossbeams. The upper end face of the first diagonal brace beam (1.313) is fixedly connected to the lower end face of the first horizontal longitudinal support beam (1.311). The lower end face of the first diagonal brace (1.313) is fixedly connected to the front end face of the column below the first horizontal longitudinal support beam (1.311). The upper end face of the second diagonal brace (1.314) is fixedly connected to the lower end face of the second horizontal longitudinal support beam (1.312). The lower end face of the second diagonal brace (1.314) is fixedly connected to the rear end face of the column below the second horizontal longitudinal support beam (1.312). The first diagonal brace (1.313) and the second diagonal brace (1.314) form a V-shaped structure. Both the first horizontal longitudinal support beam (1.311) and the second horizontal longitudinal support beam (1.312) are provided with cross-shaped positioning bases (3) for positioning and fixing with the cross reference holes on the concave arc of the protective beam assembly.

5. The electrophoresis fixture for automotive protective beam assembly according to claim 4, characterized in that, Each set of upper support brackets (1.31) also includes a first upper limit support beam (1.315) and a second upper limit support beam (1.316). The first upper limit support beam (1.315) and the second upper limit support beam (1.316) both include a short horizontal beam (1.317) and a short longitudinal beam (1.318). The short horizontal beam (1.317) and the short longitudinal beam (1.318) are horizontally arranged and the short longitudinal beam (1.318) is vertically fixed to one end of the short horizontal beam (1.317). The first upper limit support beam (1.315) and the second upper limit support beam (1.316) are symmetrically fixed to the outer surfaces of the first diagonal brace beam (1.313) and the second diagonal brace beam (1.314) and the short longitudinal beams (1.318) of the two beams face opposite directions.

6. The electrophoresis fixture for automotive protective beam assembly according to claim 5, characterized in that, Two sets of lower support brackets (1.32) are symmetrically fixed on the first column (1.21) and the second column (1.22) between the third crossbeam (1.25) and the bottom longitudinal beam, and both sets of lower support brackets (1.32) are perpendicular to the third crossbeam (1.25).

7. The electrophoresis fixture for automotive protective beam assembly according to claim 6, characterized in that, Each set of lower support brackets (1.32) includes a third horizontal longitudinal support beam (1.321), a fourth horizontal longitudinal support beam (1.322), a first vertical support beam (1.323), and a second vertical support beam (1.324). The third horizontal longitudinal support beam (1.321) and the fourth horizontal longitudinal support beam (1.322) are respectively fixedly connected to the front and rear facades of the fixed connection between the first column (1.21) / second column (1.22) and the third crossbeam (1.25). The upper surfaces of the third horizontal longitudinal support beam (1.321) and the fourth horizontal longitudinal support beam (1.322) are both connected to the third crossbeam (1.324). The upper surface of 25) is flush with the first vertical support beam (1.323), which is vertically fixed between the third horizontal longitudinal support beam (1.321) and the first bottom longitudinal beam (1.11) / second bottom longitudinal beam (1.12). The second vertical support beam (1.324) is vertically fixed between the fourth horizontal longitudinal support beam (1.322) and the first bottom longitudinal beam (1.11) / second bottom longitudinal beam (1.12). The third horizontal longitudinal support beam (1.321) and the fourth horizontal longitudinal support beam (1.322) are both provided with cross-shaped positioning bases (3), which are used to position and insert with the cross reference holes on the concave arc of the protective beam assembly.

8. The electrophoresis fixture for automotive protective beam assembly according to claim 7, characterized in that, Each set of lower support brackets (1.32) also includes two lower limit support beams (1.325). One end of the two lower limit support beams (1.325) on the same side is symmetrically fixed to the outer surface of the first vertical support beam (1.323) and the second vertical support beam (1.324). The lower limit support beams (1.325) and the beams are in the same direction.

9. The electrophoresis fixture for automotive protective beam assembly according to claim 1, characterized in that, The hook (2.1) is a ring hook. The adjustable fixing clamping device (2.2) includes an upper jaw (2.21), a lower jaw (2.22), a nut (2.23), a limiting pin (2.24), a limiting pin (2.25), and a fixing pin (2.26). The upper part of the ring hook is provided with a circular through hole, and the lower part is provided with a hook. The top of the upper jaw (2.21) is provided with a circular hook that matches the hook at the bottom of the ring hook. The upper part of the upper jaw (2.21) is provided with a circular through hole. The nut (2.23) is provided with a ring hook that matches the hook at the bottom of the ring hook. 23) Welded and fixed in the circular through hole, the upper jaw (2.21) and the lower jaw (2.22) are hinged by the fixing pin (2.26), and the limiting pin (2.25) can be inserted and fixed on the upper jaw (2.21) and the lower jaw (2.22) for limiting and locking the upper jaw (2.21) and the lower jaw (2.22). The limiting screw (2.24) can be threaded into the nut (2.23) and exposed outside the nut (2.23) for fixed connection with the hole on the protective beam assembly.

10. A method of using an electrophoresis fixture for an automotive protective beam assembly as described in any one of claims 1-9, characterized in that the steps include... include: S1. The worker places the electrophoresis hanger (1) in the electrophoresis frame and inserts the two ends of the bottom longitudinal beam into the mesh below the electrophoresis frame to limit and fix the electrophoresis hanger (1) in the electrophoresis frame. S2. In the raw material area where the protective beam assembly is stored, the upper jaw (2.21) and lower jaw (2.22) of the lifting device (2) are hinged together by a fixing pin (2.26). The limiting screw (2.24) is screwed into the nut (2.23) of the upper jaw (2.21) and placed in a loose state. The circular through hole at the top of the ring hook is connected to the overhead crane wire, and the hook at the bottom of the ring hook is hung on the top of the upper jaw (2.21). On the circular hook, insert the upper jaw (2.21) into the upper surface of the protective beam assembly, then fasten the lower jaw (2.22), use the limit pin (2.25) to lock the upper and lower jaws, and screw the limit screw (2.24) into the nut (2.23) to lock it and push it into the corresponding hole on the protective beam assembly. Carry out the lifting operation, transport the protective beam assembly one by one to the electrophoresis hanger (1) in the swimming frame for hanging, so that the protective beam assembly is along the horizontal The beam is placed on the electrophoresis hanger (1). When installing, the concave arc surface of the protective beam assembly faces downward. Align the cross reference hole on the concave arc surface of the protective beam assembly with the cross-shaped positioning base (3) at the corresponding position and insert and fix it. At this time, the mounting bracket of the protective beam assembly is supported on the corresponding first upper limit support beam (1.315) / second upper limit support beam (1.316) / lower limit support beam (1.325). After the installation is completed, the lifting device (2) is disassembled. The limit pin (2.24) is unscrewed, and then the limit pin (2.25) is removed. After the lower jaw (2.22) is opened, the lifting device (2) can be removed from the protective beam assembly. The crane and the lifting device (2) return to the raw material area to pick up materials. The previous operation is repeated until the entire electrophoresis rack (1) is full of protective beam assembly. After the lifting device (2) is removed, it is taken to the offline station for use. S3. The overhead crane delivers the electrophoresis frame, which is equipped with the electrophoresis bracket (1) and the protective beam assembly, to the roller bed positioning point of the electrophoresis station for electrophoresis. S4. After electrophoresis is completed, the overhead crane will transport the electrophoresis frame as a whole to the post-painting storage area. Then, with the help of the lifting device (2), the post-painting protective beam assembly will be fixed and the post-painting protective beam assembly will be sent to the inspection area one by one.

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