A fender spraying tool capable of preventing paint from accumulating on the edge of the paint

Abstract

The utility model relates to the technical field of automobile manufacturing, and specifically discloses a fender spraying tool capable of preventing paint from accumulating on the edge of the fender. The tool comprises a metal main body compatible with the fender, a fixing mechanism and multiple positioning mechanisms installed on the metal main body. The metal main body, as the core component of electric field reconstruction, can effectively change the original electric field distribution pattern. The multiple positioning mechanisms are separately arranged on the metal main body and used to realize multi-point positioning with multiple positioning points on the fender, thereby ensuring the stability of the tool installation. The fixing mechanism is arranged between the multiple positioning mechanisms and used to lock the metal main body and the fender. In combination with the multi-point positioning of the positioning mechanisms, the fixing mechanism can ensure the installation accuracy and stability of the tool during the spraying process. The utility model solves the technical problem of paint accumulation on the edge of the fender during the fender spraying process and realizes the universality of multiple vehicle models through adjustable design, thereby significantly reducing the development and use cost of the tool.

Description

Technical Field

[0001] This utility model relates to the field of automobile manufacturing technology, and in particular to the fender paint spraying technology in automobile body painting process, specifically to a fender spraying fixture for preventing paint accumulation at the paint edge. Background Technology

[0002] Currently, the automotive manufacturing industry widely uses robotic electrostatic spraying systems to paint body parts. This automated spraying method uses a high-voltage electrostatic field to charge the paint and evenly adhere it to the vehicle body surface, offering advantages such as high construction efficiency and stable coating quality. In the overall vehicle painting process, the fender, as a crucial component of the vehicle's exterior, forms a key color-matching surface with the bumper, requiring extremely high levels of uniformity in paint application.

[0003] However, existing electrostatic spraying technology has inherent physical limitations, particularly when dealing with parts with sharp edges and corners. Due to the edge effect of the electrostatic field, the edges and corners of the fender exhibit a high concentration of electrostatic forces, causing these areas to absorb far more paint than normal flat areas, resulting in paint buildup. This physical phenomenon directly causes uneven paint distribution on the fender surface, creating noticeable color deviations. When the fender is assembled alongside the bumper, this results in visual color differences, severely impacting the overall appearance quality of the vehicle. Existing solutions primarily involve adjusting spraying parameters or performing subsequent repair work, but neither can fundamentally eliminate the edge concentration effect of the electrostatic field.

[0004] With the automotive industry's ever-increasing demands for exterior quality, the color matching consistency between the fenders and bumpers has become a crucial indicator of overall vehicle quality. Currently, the industry lacks dedicated tooling to effectively address the issue of paint accumulation at the fender edges. This not only affects product quality but also increases rework costs and production line efficiency losses. Therefore, there is an urgent need to develop a dedicated tooling system that can be installed on the fenders and enters the paint booth along with the vehicle body. This system would eliminate edge paint accumulation by altering the electric field distribution characteristics, thereby improving paint spraying uniformity and overall vehicle appearance quality. Utility Model Content

[0005] Based on the above description, this utility model provides a fender spraying fixture to prevent paint accumulation at the edges, thereby solving the technical problem of paint accumulation at the edges in the fender spraying process. It can also be used for multiple vehicle models through adjustable design, significantly reducing the development and use costs of the fixture.

[0006] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: A fender spraying fixture for preventing paint buildup at paint edges includes a metal body, a fixing mechanism mounted on the metal body, and at least two positioning mechanisms, wherein: The shape of the metal body is configured to fit the fender; At least two positioning mechanisms are spaced apart on the metal body for engaging with multiple positioning points on the fender; The fixing mechanism is detachably connected to the fender and is used to lock the metal body to the fender.

[0007] Based on the above technical solution, the present invention can be further improved as follows.

[0008] Furthermore, the metal body includes a first metal plate, a second metal plate, and a movable joint. The adjacent ends of the first metal plate and the second metal plate are rotatably connected through the movable joint. At least one positioning mechanism is disposed on the first metal plate, and at least one other positioning mechanism is disposed on the second metal plate. The fixing mechanism is disposed on the first metal plate or the second metal plate.

[0009] Furthermore, the movable joint is a hinge structure.

[0010] Furthermore, the positioning mechanism includes a positioning pin, which is disposed on the end of the positioning mechanism facing the fender.

[0011] Furthermore, the extended end of the locating pin is arc-shaped.

[0012] Furthermore, the positioning mechanism includes an adjusting bolt, one end of which is configured as a threaded adjusting part that engages with a threaded hole on the metal body; the other end of the adjusting bolt is configured as a positioning pin that is used to insert into a positioning hole on the fender.

[0013] Furthermore, the middle section of the adjusting bolt is provided with a gripping part, the radial dimension of which is larger than that of the locating pin and the threaded adjusting part.

[0014] Furthermore, the circumferential surface of the grip portion is provided with an anti-slip layer.

[0015] Furthermore, the gripping part is polygonal in shape.

[0016] Furthermore, the fixing mechanism includes a fixing nut, which is fixedly disposed on the metal body on the side facing the fender.

[0017] Compared with the prior art, the technical solution of this application has the following beneficial technical effects: This utility model provides a fender spraying fixture for preventing paint accumulation at the edges. The metal body, as the core component for electric field reconstruction, is shaped to fit the fender, effectively altering the original electric field distribution. Separate positioning mechanisms ensure the stability of the fixture installation, achieving precise alignment through multi-point positioning. The fixing mechanism is detachably connected to the fender, forming a stable multi-point positioning support structure in conjunction with multiple positioning mechanisms, ensuring the fixture's stability during spraying. This utility model effectively disperses edge electric field forces by adapting the metal body to the fender's shape, solving the problem of paint accumulation. The multi-point positioning design improves installation accuracy and reduces human error. The reasonable mechanism layout ensures the overall stability of the fixture, preventing displacement during spraying. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of a fender spraying fixture structure for preventing paint accumulation at the edge of paint provided in a certain embodiment of the present utility model, wherein (a) is a right view, (b) is a front view, and (c) is a bottom view; Figure 2 This is a schematic diagram of a fender spraying fixture structure for preventing paint accumulation at the edge of paint, provided in another embodiment of the present utility model, wherein (a) is a right view and (b) is a front view; Figure 3 A schematic diagram of the movable joint structure provided for an embodiment of this utility model; Figure 4 A schematic diagram of the positioning mechanism provided in an embodiment of this utility model.

[0019] The attached diagram lists the components represented by each number as follows: 1. Metal body, 101. First metal plate, 102. Second metal plate, 103. Movable joint, 2. Positioning mechanism, 201. Positioning pin, 201a. Extension end, 202. Adjusting bolt, 202a. Grip part, 203. Threaded adjustment part, 3. Fixing mechanism. Detailed Implementation

[0020] To facilitate understanding of this application, a more complete description will be provided below with reference to the accompanying drawings, which illustrate embodiments of the present application. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of this application will be thorough and complete.

[0021] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0022] It is understood that spatial relation terms such as "below," "under," "below," "below," "above," "over," etc., can be used here to describe the relationship between one element or feature shown in the figure and other elements or features. It should be understood that, in addition to the orientation shown in the figure, spatial relation terms also include different orientations of the device in use and operation. For example, if the device in the figure is flipped, the element or feature described as "below" or "under" or "below" of other elements or features will be oriented "over" of other elements or features. Therefore, the exemplary terms "below" and "under" can include both upper and lower orientations. Furthermore, the device may also include other orientations (e.g., rotated 90 degrees or other orientations), and the spatial descriptive terms used herein will be interpreted accordingly.

[0023] It should be noted that when one element is considered to be "connected" to another element, it can be directly connected to the other element or connected to the other element through an intermediary element. In the following embodiments, "connection" should be understood as "electrical connection," "communication connection," etc., if the connected circuits, modules, units, etc., have the transmission of electrical signals or data between them.

[0024] When used herein, the singular forms of “a,” “an,” and “the” may also include the plural forms unless the context clearly indicates otherwise. It should also be understood that the terms “comprising,” “including,” or “having,” etc., specify the presence of the stated feature, whole, step, operation, component, part, or combination thereof, but do not preclude the possibility of the presence or addition of one or more other features, wholes, steps, operations, components, parts, or combinations thereof.

[0025] like Figure 1 As shown in (a) right view, (b) front view, and (c) bottom view, this embodiment provides a fender spraying fixture for preventing paint accumulation at the paint edge. The fixture includes a metal body 1, a fixing mechanism 3 and at least two positioning mechanisms 2 mounted on the metal body 1, wherein: The shape of the metal body 1 is configured to fit the fender; At least two positioning mechanisms 2 are spaced apart on the metal body 1 for cooperating with multiple positioning points on the fender; The fixing mechanism 3 is detachably connected to the fender and is used to lock the metal body 1 to the fender.

[0026] Understandably, based on the deficiencies pointed out in the background art, this embodiment provides a fender painting fixture to prevent paint accumulation at the paint edge. Before the painting process begins, the orientation of the metal body 1 is first adjusted to match the position of the paint edge of the fender; then, at least two positioning mechanisms 2 are inserted and engaged with multiple positioning holes on the fender to achieve multi-point positioning; finally, the positioned fender is locked to the fixture by the fixing mechanism 3. The fender with the fixture is then sent into the painting chamber along with the vehicle body for painting.

[0027] In the painting process, the metal body 1, as the core component for electric field reconstruction, is shaped to match the front end of the fender. By transferring and dispersing the electric field force at the fender edge, it effectively changes the original electric field distribution pattern, reduces the problem of high concentration of electrostatic field at the fender edge and corners, prevents uneven paint spraying at the fender edge and corner areas, and improves the appearance quality. The metal plate has sufficient strength to prevent deformation during use. The separate setting of the positioning mechanism 2 ensures the stability of the tooling installation, achieving precise alignment through multi-point positioning (e.g., fixing in the Y and Z directions based on the vehicle coordinate system). The fixing mechanism 3 is detachably connected to the fender and, in cooperation with the positioning mechanism 2, forms a stable multi-point positioning and support structure, ensuring the stability of the tooling during the painting process.

[0028] In this embodiment, the shape of the metal body 1 is adapted to the fender, which effectively disperses the edge electric field force and solves the problem of paint accumulation at the edge of the spray painting. The multi-point positioning design improves the installation accuracy and reduces human operation error. The reasonable mechanical layout ensures the overall stability of the tooling and prevents displacement during the spraying process.

[0029] Based on the above technical solution, this embodiment can be further improved as follows.

[0030] For example, Figure 1 In the illustrated embodiment, the metal body 1 does not have a bending angle adjustment function; Figure 2 In the illustrated embodiment, the metal body 1 has a bending angle adjustment function.

[0031] In one possible implementation, such as Figure 2 As shown in the right view (a) and front view (b) of the figure, the metal body 1 includes a first metal plate 101, a second metal plate 102 and a movable joint 103. The adjacent ends of the first metal plate 101 and the second metal plate 102 are rotatably connected through the movable joint 103. At least one positioning mechanism 2 is disposed on the first metal plate 101 and at least one other positioning mechanism 2 is disposed on the second metal plate 102. The positioning mechanisms 2 on the first metal plate 101 and the second metal plate 102 are both arranged facing the fender. The fixing mechanism 3 is disposed on the first metal plate 101 or the second metal plate 102.

[0032] Understandably, the movable joint 103 design allows the first metal plate 101 and the second metal plate 102 to rotate relative to each other, achieving angle adjustment through a hinged connection. This structure allows the tooling to adaptively adjust to the curvature variations of fenders on different vehicle models, improving the tooling's versatility and applicability. Each metal plate segment has sufficient strength, and the segmented hinged design of the metal body 1 enhances the tooling's adaptability to fenders on different vehicle models, increasing tooling utilization, reducing the frequency of tooling replacements due to vehicle model changes, and lowering production costs. In this embodiment, angle adjustment ensures the optimal relative position between the metal body 1 and the fender.

[0033] Furthermore, such as Figure 3 As shown, the movable joint 103 can adopt a hinge structure. The hinge structure realizes the hinge connection between the first metal plate 101 and the second metal plate 102 through the hinge shaft. It is preferable to use a damping hinge, which provides a certain damping force when adjusting the angle of the metal body 1, so that the rotational movement of the metal body 1 is slow and smooth, and can also provide an angle positioning function, so that the first metal plate 101 and the second metal plate 102 can be maintained at a specific opening angle.

[0034] It is understood that the hinge structure in this embodiment, as a mature and reliable hinge method, achieves relative rotational movement between two metal plates through a pin connection. This structure features smooth movement, long service life, and the ability to be angularly positioned and adjusted, enabling it to withstand the long-term use requirements of spraying environments.

[0035] In one possible implementation, such as Figure 1 (a) and Figure 2 As shown in (a), the positioning mechanism 2 includes a positioning pin 201, which is disposed on the end of the positioning mechanism 2 facing the fender.

[0036] Understandably, the locating pin 201, as a precision positioning element, achieves rapid and accurate positioning of the tooling through its end engaging with the positioning hole in the fender. This mechanical positioning method has the advantages of high repeatability and reliability.

[0037] Furthermore, such as Figure 4 As shown, the extension end 201a of the positioning pin 201 is arc-shaped.

[0038] Understandably, the curved design at the end of the locating pin 201 serves as a guide when inserted into the locating hole, reducing installation resistance. Simultaneously, the curved contact helps disperse contact stress, preventing wear on the locating hole.

[0039] Figure 1In the illustrated embodiment, the upper positioning mechanism 2 has no telescopic adjustment function, but only a positioning pin 201 fixedly connected to the metal body 1, while the lower positioning mechanism 2 has a telescopic adjustment function. Figure 2 In the illustrated embodiment, both the upper and lower positioning mechanisms 2 have telescopic adjustment functions.

[0040] In one possible implementation, such as Figure 4 As shown, the positioning mechanism 2 includes an adjusting bolt 202. One end of the adjusting bolt 202 is configured as a threaded adjusting part 203, which engages with a threaded hole on the metal body 1. The other end of the adjusting bolt 202 is configured as a positioning pin 201, which is used to insert and cooperate with the positioning hole of the fender.

[0041] Understandably, the adjusting bolt 202 is retractably mounted on the metal body 1 via threads, achieving precise axial position adjustment through the threaded pair. One end functions as a positioning pin 201, while the other end achieves axial position locking and adjustment through thread engagement. In this embodiment, the retractable design of the positioning mechanism 2 allows for fine-tuning of the relative position between the tooling and the fender, optimizing the electric field distribution.

[0042] like Figure 4 As shown, the middle section of the adjusting bolt 202 is provided with a gripping part 202a, and the radial dimension of the gripping part 202a is larger than that of the positioning pin 201 and the threaded adjusting part 203.

[0043] Understandably, the increased radial dimension of the grip 202a provides the operator with a good point of force application, facilitating adjustment by hand or with tools. This embodiment's ergonomic design considers the actual operational needs of the production line, improving the convenience and efficiency of adjustment operations, reducing tool slippage, ensuring operational safety, and adapting to the fast-paced working environment of the production line.

[0044] Furthermore, the circumferential surface of the grip portion 202a is provided with an anti-slip layer, such as a "human" shaped pattern, horizontal lines, grid pattern, etc., or an elastic coating layer.

[0045] Understandably, the anti-slip layer significantly increases the friction between the grip 202a and the tool or hand by increasing the surface friction coefficient, preventing slippage during adjustment, ensuring adjustment accuracy and operational safety, enhancing operational stability, and preventing accidental sliding during adjustment.

[0046] In one possible implementation, the gripping part 202a is a polygonal column.

[0047] Understandably, the polygonal columnar structure provides a standard clamping surface for general-purpose tools, facilitating adjustment using standard tools such as wrenches. This embodiment improves the versatility and ease of maintenance of the tooling.

[0048] In one possible implementation, such as Figure 1 and Figure 2 As shown, the fixing mechanism 3 includes a fixing nut, which is fixedly disposed on the metal body 1 on the side facing the fender.

[0049] Understandably, the fixing nut is located on the side of the metal body 1 facing the fender. This arrangement allows the fastening force to be applied directly to the contact surface between the tooling and the fender after the tooling and the fender are positioned, the fixing bolt is inserted through the fender and screwed into the fixing nut, thus improving the stability and reliability of the connection.

[0050] Workflow: First, adjust the movable joint 103 so that the angle formed by the two metal plates on the metal body 1 matches the shape of the fender to be painted; Each positioning mechanism 2 has its positioning pin 201 inserted into each positioning hole on the fender, and the insertion depth of the positioning pin 201 can be adjusted by rotating the adjusting bolt 202 to improve the positioning accuracy. Insert the fixing bolts through the fender and screw them into the fixing nuts on the metal body 1 until the fender is effectively fixed to the metal body 1; The fixed tooling and fenders are sent into the spraying chamber along with the production line to complete the spraying process.

[0051] This invention addresses the problem of paint buildup on automotive fenders during electrostatic spraying due to concentrated electric fields at the edges. It proposes an innovative anti-paint-accumulation tooling solution, specifically a fender spraying tooling designed to prevent paint buildup at the edges. This tooling utilizes a metal body 1, whose shape is adapted to the front end of the fender, to effectively transfer and disperse the electrostatic field force in the edge area, fundamentally improving the uniformity of paint adsorption. Its design includes a precise positioning mechanism 2 and a simple fixing mechanism 3. At least two positioning pins 201 engage with the positioning holes on the fender to achieve rapid alignment. The hinged structure of the movable joint 103 allows the tooling to be angled to adapt to the curved surfaces of fenders on different vehicle models, enhancing its versatility. Simultaneously, the retractable positioning pins 201 allow for fine-tuning of the distance between the metal plate and the fender to optimize the spraying effect. This tooling structure is lightweight and quick to install, allowing it to enter the paint booth along with the vehicle body. Without obstructing the normal spraying path, it significantly improves the color matching consistency between the fender and the bumper, reduces the risk of color difference quality, and lowers tooling development and production costs.

[0052] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A fender spraying fixture for preventing paint accumulation at the paint edges, characterized in that, Includes a metal body (1), a fixing mechanism (3) mounted on the metal body (1), and at least two positioning mechanisms (2), wherein: The shape of the metal body (1) is configured to fit the fender; At least two positioning mechanisms (2) are spaced apart on the metal body (1) for cooperating with multiple positioning points on the fender; The fixing mechanism (3) is detachably connected to the fender and is used to lock the metal body (1) to the fender.

2. The fender spraying fixture for preventing paint accumulation at the edges according to claim 1, characterized in that, The metal body (1) includes a first metal plate (101), a second metal plate (102) and a movable joint (103). The adjacent ends of the first metal plate (101) and the second metal plate (102) are rotatably connected through the movable joint (103). At least one positioning mechanism (2) is disposed on the first metal plate (101) and at least one other positioning mechanism (2) is disposed on the second metal plate (102). The fixing mechanism (3) is disposed on the first metal plate (101) or the second metal plate (102).

3. The fender spraying fixture for preventing paint accumulation at the edges according to claim 2, characterized in that, The movable joint (103) is a hinge structure.

4. The fender spraying fixture for preventing paint accumulation at the edges according to claim 1, characterized in that, The positioning mechanism (2) includes a positioning pin (201), which is disposed on the end of the positioning mechanism (2) facing the fender.

5. The fender spraying fixture for preventing paint accumulation at the edges according to claim 1, characterized in that, The positioning mechanism (2) includes an adjusting bolt (202), one end of which is configured as a threaded adjusting part (203), which engages with a threaded hole on the metal body (1); the other end of the adjusting bolt (202) is configured as a positioning pin (201), which is used to engage with a positioning hole on the fender.

6. A fender spraying fixture for preventing paint accumulation at paint edges according to claim 4 or 5, characterized in that, The extension end (201a) of the positioning pin (201) is arc-shaped.

7. The fender spraying fixture for preventing paint accumulation at the paint edge according to claim 5, characterized in that, The middle section of the adjusting bolt (202) is provided with a gripping part (202a), the radial dimension of which is larger than that of the locating pin (201) and the threaded adjusting part (203).

8. The fender spraying fixture for preventing paint accumulation at the edges according to claim 7, characterized in that, The circumferential surface of the grip (202a) is provided with an anti-slip layer.

9. A fender spraying fixture for preventing paint accumulation at paint edges according to claim 7, characterized in that, The gripping part (202a) is a polygonal column.

10. A fender spraying fixture for preventing paint accumulation at paint edges according to claim 1, characterized in that, The fixing mechanism (3) includes a fixing nut, which is fixedly disposed on the metal body (1) on the side facing the fender.

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