Automobile front face system matching positioning structure and matching positioning method

Abstract

This invention discloses a matching and positioning structure and method for a car front-end system, relating to the field of automotive component assembly and positioning technology. It includes a body assembly, a bumper support fixture, a bumper support, and left and right headlights. The body assembly includes left and right wheel arch outer panels, each with positioning holes. The bumper support fixture has primary and secondary positioning pins, which position the bumper support onto the positioning holes on the left and right wheel arch outer panels. The bumper support fixture also has bumper support positioning pins located on the left and right sides and in the middle, as well as left and right headlight positioning surfaces located on the left and right sides. The left and right headlights are positioned using these positioning surfaces, and the bumper support is positioned using multiple bumper support positioning pins. This invention uses a single fixture to position the bumper support and left and right headlights, reducing accumulated assembly tolerances and improving operational convenience. By reserving adjustment and matching methods for the left and right headlights, it improves the overall vehicle quality.

Description

Technical Field

[0001] This invention relates to the field of automotive component assembly and positioning technology, and in particular to a matching and positioning structure and method for an automotive front-end system. Background Technology

[0002] In automotive assembly design, the perceived quality of the front fascia is paramount. The assembly and positioning of the front fascia system, along with its associated components such as the headlights, fenders, hood, and front bumper, has always been a key and challenging aspect of comprehensive matching. In particular, the increasingly common issue of the gap between the front bumper and hood systems (i.e., the X-direction gap and Y-direction surface difference) is a critical focus of current comprehensive matching, as this area has high visual perception and significant impact. Furthermore, the matching of the headlights, taillights, and center lights involves high visual perception of the Y-direction gap and left-right surface difference, and the matching boundaries in this area are complex, making matching difficult. Therefore, the assembly positioning and matching methods for components in the automotive front fascia area are especially important, and these methods are complex and challenging.

[0003] The existing automotive front-end system is associated with matching parts such as headlights, fenders, hood, and front bumper system. Typically, the front bumper system bracket uses one set of installation auxiliary tooling, and the lighting system uses another set of installation auxiliary tooling. Such assembly will result in a large accumulation of tolerances, inconvenient operation, affect the overall vehicle quality, and waste labor costs. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention proposes a matching and positioning structure and method for a car front-end system. A matching and positioning fixture is used to position the bumper bracket and the left and right headlights, reducing accumulated assembly tolerances and improving operational convenience. Simultaneously, during assembly, a pre-designed adjustment and matching method for the left and right headlights further enhances the refinement of the front end and the symmetry and acceptable gap between the left and right headlights and the center headlight. This eliminates the need to remove the front bumper system; the gap adjustment of the left and right headlights is achieved through an avoidance structure, avoiding scratches on parts and wasted production time caused by disassembling the front bumper system, thus preventing the waste of human resources and effectively improving overall vehicle quality and employee satisfaction.

[0005] To achieve the above objectives, one or more embodiments of the present invention provide the following technical solutions:

[0006] The first aspect of this invention provides a matching and positioning structure for a car front-end system.

[0007] A matching and positioning structure for a car front-end system includes a body assembly, a mounting bracket tooling, a mounting bracket, and left and right headlights;

[0008] The vehicle body assembly includes left and right wheel arch outer panels, each with positioning holes. The upper support bracket fixture has primary and secondary positioning pins, which are respectively positioned on the positioning holes of the left and right wheel arch outer panels. The fixture also includes upper support bracket positioning pins located on the left and right sides and in the middle, as well as left and right headlight positioning surfaces located on the left and right sides. The left and right headlights are respectively positioned by matching the left and right headlight positioning surfaces, and the upper support bracket is positioned by matching multiple upper support bracket positioning pins.

[0009] Further technical solutions include fenders and hoods;

[0010] The fender is positioned by matching the positioning pins on the fender tooling with the positioning holes on the outer panels of the left and right wheel arches of the vehicle body, and is then assembled into the vehicle body assembly.

[0011] The hood is positioned by matching the locating pin on the hood tool with the main locating hole of the headlight on the fender, and then assembled into the body assembly.

[0012] A further technical solution includes left and right fenders, each fender having a headlight main positioning hole; the fender includes a fender tooling, the fender being matched, positioned, and assembled to the vehicle assembly via the fender tooling, including:

[0013] The fender fixture is positioned in the Z-direction on the Z-direction surface of the outer panels of the left and right wheel arches of the vehicle body. The fender fixture is positioned in the XY direction on the positioning hole of the outer panel of the left wheel arch of the vehicle body by a cylindrical pin. The fender fixture is positioned in the Y direction on the positioning hole of the outer panel of the right wheel arch of the vehicle body by a diamond pin.

[0014] A further technical solution includes a hood fixture, through which the hood is positioned and assembled to the vehicle body assembly, comprising:

[0015] The hood fixture is positioned in the Z-direction on the Z-direction surface of the outer panels of the left and right wheel arches of the vehicle body. The hood fixture is positioned in the XY direction on the main headlight positioning hole of the left fender by a cylindrical pin. The hood fixture is positioned in the X direction on the main headlight positioning hole of the right fender by a diamond pin.

[0016] A further technical solution involves providing a main headlight positioning pin and a secondary headlight positioning pin on either the left or right headlight.

[0017] The main headlight positioning pin of the left headlight is inserted into the main headlight positioning hole in the left fender, and the secondary headlight positioning pin is inserted into the secondary headlight positioning hole on the left side of the upper bracket.

[0018] The main headlight positioning pin of the right headlight is inserted into the main headlight positioning hole in the right fender, and the secondary headlight positioning pin is inserted into the secondary headlight positioning hole on the right side of the upper bracket.

[0019] A further technical solution is that the upper support bracket positioning pins located on the left and right sides and the middle of the upper support bracket tooling are respectively the upper support bracket positioning pins on the first, second and third toolings. The upper support bracket positioning pin on the first tooling positions the upper support bracket in the X direction, the upper support bracket positioning pin on the second tooling positions the upper support bracket in the Y direction, and the upper support bracket positioning pin on the third tooling positions the upper support bracket in the X direction.

[0020] The left and right headlight positioning surfaces on the upper bracket fixture are respectively the left headlight positioning surface and the right headlight positioning surface. The left headlight positioning surface positions the left headlight in the Y direction, and the right headlight positioning surface positions the right headlight in the Y direction.

[0021] Further technical solutions also include protecting the decorative panel;

[0022] The upper bracket is provided with upper decorative panels on the left and right sides and in the middle, as well as upper bracket positioning holes. The upper decorative panels are positioned on the upper decorative panels and upper bracket positioning holes by positioning pins, and the upper decorative panels are assembled to the upper bracket by pin connections.

[0023] A further technical solution is that the upper support bracket is positioned by matching multiple upper support bracket positioning pins, including:

[0024] The positioning pins of the upper bracket on the left and right sides and the middle of the upper bracket are respectively positioned and matched with the positioning holes of the upper bracket decorative plate on the left and right sides and the middle of the upper bracket.

[0025] Further technical solutions also include central lamps;

[0026] The upper bracket is provided with a center lamp positioning hole. The center lamp is positioned in the center lamp positioning hole by a positioning pin, and the center lamp is assembled to the upper bracket by a pin connection.

[0027] The second aspect of the present invention provides a method for matching and locating a vehicle front-end system.

[0028] A method for matching and locating a vehicle front-end system, comprising the vehicle front-end system matching and locating structure proposed in the first aspect, includes the following steps:

[0029] The fender is positioned by matching the positioning pins on the fender tooling with the positioning holes on the outer panels of the left and right wheel arches of the vehicle body, and then assembled into the body assembly.

[0030] The hood is positioned by matching the locating pin on the hood tool with the main locating hole of the headlight on the fender, and then assembled into the body assembly.

[0031] The left and right headlights are pre-installed on the fenders and upper brackets via positioning pins, and the upper brackets are pre-mounted on the front of the body assembly;

[0032] The upper bracket fixture is used to position the upper bracket and the left and right headlights. After positioning, the upper bracket and the left and right headlights are locked, and the upper bracket fixture is removed.

[0033] Match and position the center headlights and the upper trim panel, and install them onto the upper bracket;

[0034] The matching boundary gaps of the car's front-end system are checked, and after fine-tuning, the assembly is completed.

[0035] The above one or more technical solutions have the following beneficial effects:

[0036] This invention proposes a matching and positioning structure and method for a car front-end system. It employs a single set of matching and positioning fixtures to position the bumper support and left and right headlights, reducing the accumulated assembly tolerances of related components such as headlights, fenders, hood, and front bumper system. This solves the problems of tolerance accumulation and operational inconvenience caused by separate installation fixtures for the bumper support and headlights in existing assembly methods, effectively improving operational convenience. Simultaneously, by reserving an adjustment and matching method for the left and right headlights during assembly, it further enhances the refinement of the front end and the symmetry and acceptable gap between the left and right headlights and the center headlight. This adjustment and matching method eliminates the need to remove the front bumper system, achieving gap adjustment through an avoidance structure. This avoids scratches on parts and wasted production time caused by disassembling the front bumper system, preventing the waste of human resources and effectively improving overall vehicle quality and employee satisfaction. Attached Figure Description

[0037] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an improper limitation of the invention.

[0038] Figure 1 This is an axonometric view of a key matching component of the automotive front-end system in an embodiment of the present invention;

[0039] Figure 2 This is a schematic diagram of the structure of the support bracket tool in an embodiment of the present invention;

[0040] Figure 3 This is a schematic diagram of the matching and positioning structure of the car front face system according to an embodiment of the present invention.

[0041] The components include: 1. Body assembly; 2. Fender; 101. Headlight main positioning hole; 102. Headlight secondary positioning hole; 3. Hood; 4. Upper bumper bracket fixture; 41. Main positioning pin; 42. Secondary positioning pin; 43. Left headlight positioning surface of fixture; 44. Right headlight positioning surface of fixture; 45. Upper bumper bracket positioning pin of first fixture; 46. Upper bumper bracket positioning pin of third fixture; 47. Upper bumper bracket positioning pin of second fixture; 5. Upper bumper bracket; 6. Positioning hole of left wheel arch outer panel; 7. Headlight mounting point; 8. Upper bumper trim panel; 81. Positioning hole of first upper bumper trim panel and upper bracket; 82. Positioning hole of second upper bumper trim panel and upper bracket; 83. Positioning hole of third upper bumper trim panel and upper bracket; 10. Left headlight; 11. Right headlight; 12. Center headlight. Detailed Implementation

[0042] It should be noted that the following detailed descriptions are exemplary and intended to provide further illustration of the invention. Unless otherwise specified, 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 invention pertains.

[0043] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of exemplary embodiments according to the invention. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0044] Example 1

[0045] This embodiment proposes a matching and positioning structure for a car front-end system, such as... Figure 1 and Figure 3 As shown, the assembly includes a body assembly 1, fender 2, hood 3, upper bumper bracket tooling 4, upper bumper bracket 5, left and right headlights (i.e., left headlight 10 and right headlight 11), upper bumper trim panel 8, and center headlight 12. The body assembly 1 includes left and right wheel arch outer panels, each with positioning holes: left wheel arch outer panel positioning hole 6 and right wheel arch outer panel positioning hole.

[0046] The aforementioned fender 2 is positioned by matching the positioning pin on the fender tool with the positioning holes on the outer panels of the left and right wheel arches of the vehicle body, and is then assembled into the vehicle body assembly; the aforementioned hood 3 is positioned by matching the positioning pin on the hood tool with the headlight positioning holes on the fender 2, and is then assembled into the vehicle body assembly.

[0047] Specifically, the fender includes left and right fenders, each fender having a headlight main positioning hole 101; the fender includes a fender fixture, which is matched, positioned, and assembled to the body assembly, including: the fender fixture is positioned in the Z direction on the Z-plane of the outer panels of the left and right wheel arches of the body, the fender fixture is positioned in the XY direction on the positioning hole 6 of the outer panel of the left wheel arch of the body by a cylindrical pin, and the fender fixture is positioned in the Y direction on the positioning hole of the outer panel of the right wheel arch of the body by a diamond pin.

[0048] The hood includes a hood fixture, which positions and assembles the hood into the body assembly. The hood fixture is positioned in the Z direction on the Z-plane of the outer panels of the left and right wheel arches of the body. The hood fixture is positioned in the X and Y directions on the headlight main positioning hole 101 of the left fender by a cylindrical pin. The hood fixture is positioned in the X direction on the headlight main positioning hole 101 of the right fender by a diamond pin.

[0049] For either the left or right headlight, each headlight is equipped with a main headlight positioning pin and a secondary headlight positioning pin. Specifically, the upper bracket 5 has secondary headlight positioning holes 102 on both the left and right sides. The main headlight positioning pin of the left headlight is inserted into the main headlight positioning hole 101 in the left fender, and the secondary headlight positioning pin is inserted into the secondary headlight positioning hole 102 on the left side of the upper bracket 5. The main headlight positioning pin of the right headlight is inserted into the main headlight positioning hole 101 in the right fender, and the secondary headlight positioning pin is inserted into the secondary headlight positioning hole 102 on the right side of the upper bracket 5.

[0050] like Figure 2 As shown, the upper bracket fixture 4 is provided with a main positioning pin 41 and a secondary positioning pin 42. The upper bracket 5 is positioned on the positioning holes of the outer plates of the left and right wheel arches of the vehicle body by the main and secondary positioning pins respectively. The upper bracket fixture 4 is also provided with upper bracket positioning pins located on the left and right sides and the middle, as well as left and right headlight positioning surfaces located on the left and right sides. The left and right headlights are respectively matched and positioned by the left and right headlight positioning surfaces. The upper bracket 5 is matched and positioned by multiple upper bracket positioning pins.

[0051] Specifically, the upper bracket positioning pins located on the left and right sides and the middle of the upper bracket fixture 4 are respectively the upper bracket positioning pin 45 on the first fixture, the upper bracket positioning pin 47 on the second fixture, and the upper bracket positioning pin 46 on the third fixture. Among them, the upper bracket positioning pin 45 on the first fixture positions the upper bracket in the X direction, the upper bracket positioning pin 46 on the third fixture positions the upper bracket in the Y direction, and the upper bracket positioning pin 47 on the second fixture positions the upper bracket in the X direction. The left and right headlight positioning surfaces located on the left and right sides of the upper bracket fixture 4 are respectively the left headlight positioning surface 43 and the right headlight positioning surface 44. Among them, the left headlight positioning surface 43 positions the left headlight in the Y direction, and the right headlight positioning surface 44 positions the right headlight in the Y direction.

[0052] In addition, the upper bracket 5 is also provided with a headlight mounting point 7. This headlight mounting point 7 serves as a tightening point for headlight installation. After the left and right headlights are positioned through the main headlight positioning hole 101 and the secondary headlight positioning hole 102, the left and right headlights are tightened and fixed through this headlight mounting point.

[0053] The aforementioned upper support bracket 5 is provided with upper decorative panel and upper support positioning holes located on the left and right sides and in the middle, namely, the first upper decorative panel and upper support positioning hole 81, the second upper decorative panel and upper support positioning hole 82, and the third upper decorative panel and upper support positioning hole 83. These positioning holes serve as positioning holes for the upper decorative panels and also as positioning holes for the upper support bracket in the tooling. These three positioning holes correspond one-to-one with the upper decorative panel and upper support positioning holes located on the left and right sides and in the middle of the upper support bracket for positioning and installation. On this basis, the upper decorative panel 8 is positioned on the upper decorative panel and upper support positioning holes by positioning pins, and the upper decorative panel is assembled to the upper support bracket 5 by pin connection.

[0054] Furthermore, the aforementioned upper bracket 5 is also provided with a center lamp positioning hole. The center lamp 12 is positioned in the center lamp positioning hole by a positioning pin, and the center lamp is assembled to the upper bracket by a pin connection.

[0055] The aforementioned automotive front-end system matching and positioning structure in this embodiment uses fender fixtures positioned on the positioning holes of the left and right wheel arch outer panels, hood fixtures positioned on the headlight main positioning holes on the fenders, bumper bracket fixtures positioned on the positioning holes of the left and right wheel arch outer panels, and bumper system decorative panels positioned on the bumper bracket. By linking the key components of the front-end system together through the positioning holes of the left and right wheel arch outer panels, the datum conversion of the component assembly positioning system is reduced, shortening the tolerance accumulation of this dimensional chain, thereby achieving the gap matching boundary between the decorative panel and the hood. The left and right headlights are positioned on the fenders and mounted on the bumper bracket, and the center headlights are mounted and positioned on the bumper bracket. Simultaneously, the bumper bracket fixture is positioned so that the positioning holes of the left and right wheel arch outer panels are consistent with the positioning points of the fender fixture, thus ensuring the left and right gaps and symmetry of the left and right headlights and center headlights. Furthermore, to further enhance the refined appearance of the left and right headlights and center headlights, assembly space is reserved at the mounting points of the left and right headlights on the bumper bracket, and the gap symmetry of the left and right headlights and center headlights is finely adjusted. Through the above methods, the cumulative assembly tolerance is shortened, and operational convenience is improved.

[0056] Example 2

[0057] This embodiment proposes a method for matching and locating a vehicle front-end system, including the vehicle front-end system matching and locating structure proposed in Embodiment 1, and includes the following steps:

[0058] Step S1: The fender is positioned by matching the positioning pins on the fender fixture with the positioning holes on the left and right wheel arch outer panels of the vehicle body, and then assembled into the vehicle body assembly. Specifically, in the welding workshop, the fender 2 is assembled into the vehicle body assembly using the fender fixture. The fender fixture is positioned in the Z-direction on the Z-plane of the left and right wheel arch outer panels of the vehicle body, in the XY direction by cylindrical pins on the positioning holes of the left wheel arch outer panel of the vehicle body, and in the Y direction by diamond pins on the positioning holes of the right wheel arch outer panel of the vehicle body.

[0059] Step S2: The hood is positioned by matching the positioning pin on the hood fixture with the headlight positioning hole on the fender and then assembled to the body assembly. Specifically, in the welding workshop, the hood 3 is assembled to the body assembly by the hood fixture. The hood fixture is positioned in the Z-direction on the Z-direction surface of the outer panels of the left and right wheel arches of the body. The hood fixture is positioned in the XY direction on the main headlight positioning hole of the left fender by a cylindrical pin, and the hood fixture is positioned in the X direction on the main headlight positioning hole of the right fender by a diamond pin.

[0060] Step S3: The left and right headlights are pre-installed onto the fenders and upper brackets using locating pins, and the upper brackets are pre-attached to the front of the vehicle assembly. Specifically, in the final assembly workshop, the left and right headlights are installed and pre-installed. The left headlight is inserted into the main headlight locating hole 101 in the left fender using the main headlight locating pin, and the secondary headlight locating pin is inserted into the secondary headlight locating hole 102 on the left side of the upper bracket 5. Headlight mounting bolts are also pre-installed. Similarly, the right headlight is inserted into the main headlight locating hole 101 in the right fender using the main headlight locating pin, and the secondary headlight locating pin is inserted into the secondary headlight locating hole 102 on the right side of the upper bracket 5. Headlight mounting bolts are also pre-installed. Next, in the final assembly workshop, the upper bracket 5 is installed and pre-attached. The upper bracket 5 is pre-attached to the front end of the vehicle body using its two guide mounting pins and the vehicle body mounting surface.

[0061] Step S4: Install the upper bracket fixture. Position the upper bracket and the left and right headlights using the upper bracket fixture. After positioning, lock the upper bracket and the left and right headlights, and then remove the upper bracket fixture.

[0062] Specifically, in the final assembly workshop, the upper bracket fixture 4 is mounted on the vehicle body. The upper bracket fixture 4 is positioned on the positioning holes of the left and right wheel arch outer panels of the vehicle body by the main positioning pin 41 and the secondary positioning pin 42, respectively, positioning the upper bracket fixture in the XY direction. The upper bracket fixture is positioned in the Z direction on the Z-direction surface of the left and right wheel arch outer panels of the vehicle body. The upper bracket positioning pin 45 on the first fixture positions the upper bracket in the X direction, the upper bracket positioning pin 47 on the second fixture positions the upper bracket in the Y direction, the upper bracket positioning pin 46 on the third fixture positions the upper bracket in the X direction, the left headlight positioning surface 43 of the fixture positions the left headlight in the Y direction, and the right headlight positioning surface 44 of the fixture positions the right headlight in the Y direction. In this way, the stability of the upper bracket 5, the left headlight 10, and the right headlight 11 on the upper bracket fixture 4 is respectively determined. After the above positioning is completed, in the final assembly workshop, tighten the mounting points of the upper bracket 5 and the body assembly, and tighten the mounting points 7 of the left headlight 10 and the right headlight 11 on the upper bracket 5 to complete the fixed assembly between the body assembly, the upper bracket, and the left and right headlights. Finally, remove the upper bracket tooling 4.

[0063] Step S5: Match and position the center lamp and the upper trim panel and install them onto the upper trim bracket. Specifically, in the final assembly workshop, the center lamp 12 is positioned onto the center lamp positioning hole of the upper trim bracket 5 using its own positioning pin, and the mounting point of the center lamp 12 on the upper trim bracket 5 is tightened; in the final assembly workshop, the upper trim panel 8 is positioned onto the first upper trim panel and upper bracket positioning hole 81, the second upper trim panel and upper bracket positioning hole 82, and the third upper trim panel and upper bracket positioning hole 83 of the upper trim bracket using its own positioning pin. At the same time, these positioning holes are the positioning holes of the upper trim bracket in the tooling, and the mounting point of the upper trim panel 8 on the upper trim bracket 5 is tightened.

[0064] Step S6: Inspect the matching boundary gap of the car's front-end system, make minor adjustments, and complete the assembly. Specifically, in the final assembly workshop, inspect the matching boundary gap and surface difference of the front end; in the final assembly workshop, inspect and subjectively perceive the symmetry of the gap between the left and right headlights and the center headlight, ensuring that the symmetry is within 0 to 0.5. If rework adjustment is required, loosen the headlight mounting point 7 and fine-tune the symmetry of the gap between the left headlight 10, right headlight 11, and center headlight 12 to improve refinement.

[0065] Using the method proposed in this embodiment, the upper bracket positioning system is consistent with the fender and hood positioning systems. At the same time, the upper decorative panel, center headlight, and left and right headlights are all positioned on the upper bracket, resulting in a short dimensional chain and less cumulative tolerance. The Y-axis assembly reference point of the left and right headlights is directly positioned on the upper bracket tooling using a matching surface. The secondary positioning pin is inspected by the fixture as a predetermined assembly guide point. The upper decorative panel reserves adjustment space and adjustment amount for the installation point of the secondary positioning pin of the headlight, thereby ensuring the matching requirements of the entire vehicle front face.

[0066] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

[0067] While the specific embodiments of the present invention have been described above in conjunction with the accompanying drawings, this is not intended to limit the scope of protection of the present invention. Those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art without creative effort based on the technical solutions of the present invention are still within the scope of protection of the present invention.

Claims

1. A matching and positioning structure for a car front-end system, characterized in that, This includes the body assembly, upper bracket tooling, upper bracket, left and right headlights, and fenders; The body assembly includes left and right wheel arch outer panels, each with positioning holes. The fenders are positioned by matching the positioning pins on the fender fixture with the positioning holes on the left and right wheel arch outer panels and are then assembled into the body assembly. The fenders include left and right side fenders, each with a headlight main positioning hole. For either the left or right headlight, a headlight main positioning pin and a headlight secondary positioning pin are provided. The main positioning pin of the left headlight is inserted into the main positioning hole in the left fender, and the secondary positioning pin is inserted into the secondary positioning hole on the left side of the upper bracket. The main headlight positioning pin of the right headlight is inserted into the main headlight positioning hole in the right fender, and the secondary headlight positioning pin is inserted into the secondary headlight positioning hole on the right side of the upper bracket. The upper support bracket is equipped with main and secondary positioning pins, and the upper support bracket is positioned on the positioning holes of the left and right wheel arch outer plates of the vehicle body by the main and secondary positioning pins respectively. The upper support bracket fixture is also provided with upper support bracket positioning pins located on the left and right sides and the middle, and left and right headlight positioning surfaces located on the left and right sides. The left and right headlights are respectively positioned by matching the left and right headlight positioning surfaces, and the upper support bracket is positioned by matching multiple upper support bracket positioning pins. The upper bracket positioning pins located on the left and right sides and the middle of the upper bracket fixture are respectively the upper bracket positioning pins of the first, second and third fixtures. The upper bracket positioning pin of the first fixture positions the upper bracket in the X direction, the upper bracket positioning pin of the second fixture positions the upper bracket in the Y direction, and the upper bracket positioning pin of the third fixture positions the upper bracket in the X direction. The left and right headlight positioning surfaces located on the left and right sides of the upper bracket fixture are respectively the left headlight positioning surface and the right headlight positioning surface. The left headlight positioning surface positions the left headlight in the Y direction, and the right headlight positioning surface positions the right headlight in the Y direction. During the assembly process, the left and right headlights are pre-installed on the fenders and the upper bracket using positioning pins, and the upper bracket is pre-attached to the front of the body assembly. The upper bracket tooling is used to position the upper bracket and the left and right headlights. After positioning, the upper bracket and the left and right headlights are locked, and the upper bracket tooling is removed.

2. The matching and positioning structure for a car front-end system as described in claim 1, characterized in that, It also includes a headlight cover; the headlight cover is positioned by matching the headlight main positioning hole on the fender with the positioning pin on the headlight cover tooling, and is then assembled into the body assembly.

3. The matching and positioning structure for a car front-end system as described in claim 2, characterized in that, The fender includes a fender tooling, which is used to match, position, and assemble the fender into the vehicle assembly. The fender fixture is positioned in the Z-direction on the Z-direction surface of the outer panels of the left and right wheel arches of the vehicle body. The fender fixture is positioned in the XY direction on the positioning hole of the outer panel of the left wheel arch of the vehicle body by a cylindrical pin. The fender fixture is positioned in the Y direction on the positioning hole of the outer panel of the right wheel arch of the vehicle body by a diamond pin.

4. The matching and positioning structure for a car front-end system as described in claim 3, characterized in that, The hood includes a hood fixture, through which the hood is positioned and assembled to the vehicle body assembly, including: The hood fixture is positioned in the Z-direction on the Z-direction surface of the outer panels of the left and right wheel arches of the vehicle body. The hood fixture is positioned in the XY direction on the main headlight positioning hole of the left fender by a cylindrical pin. The hood fixture is positioned in the X direction on the main headlight positioning hole of the right fender by a diamond pin.

5. The matching and positioning structure for a car front-end system as described in claim 1, characterized in that, This also includes the decorative panel; The upper bracket is provided with upper decorative panels on the left and right sides and in the middle, as well as upper bracket positioning holes. The upper decorative panels are positioned on the upper decorative panels and upper bracket positioning holes by positioning pins, and the upper decorative panels are assembled to the upper bracket by pin connections.

6. The matching and positioning structure for a car front-end system as described in claim 5, characterized in that, The upper support bracket is positioned by matching multiple upper support bracket positioning pins, including: The positioning pins of the upper bracket on the left and right sides and the middle of the upper bracket are respectively positioned and matched with the positioning holes of the upper bracket decorative plate on the left and right sides and the middle of the upper bracket.

7. The matching and positioning structure for a car front-end system as described in claim 1, characterized in that... It also includes the center lamp; The upper bracket is provided with a center lamp positioning hole. The center lamp is positioned in the center lamp positioning hole by a positioning pin, and the center lamp is assembled to the upper bracket by a pin connection.

8. A method for matching and locating a car front-end system, characterized in that, The vehicle front-end system matching and positioning structure as described in any one of claims 1-7 includes the following steps: The fender is positioned by matching the positioning pins on the fender tooling with the positioning holes on the outer panels of the left and right wheel arches of the vehicle body, and then assembled into the body assembly. The hood is positioned by matching the locating pin on the hood tool with the main locating hole of the headlight on the fender, and then assembled into the body assembly. The left and right headlights are pre-installed on the fenders and upper brackets via positioning pins, and the upper brackets are pre-mounted on the front of the body assembly; The upper bracket fixture is used to position the upper bracket and the left and right headlights. After positioning, the upper bracket and the left and right headlights are locked, and the upper bracket fixture is removed. Match and position the center headlights and the upper trim panel, and install them onto the upper bracket; The matching boundary gaps of the car's front-end system are checked, and after fine-tuning, the assembly is completed.

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