Fender assembling and adjusting method and vehicle

Abstract

The invention discloses a fender assembling and adjusting method and a vehicle, and belongs to the technical field of automobile assembly.The method comprises the steps that in the welding stage, the positions of an engine hood and a vehicle door are adjusted, specifically, the front portion of the engine hood is limited, the position of the rear portion of the engine hood is adjusted with a side wall as the standard, and the engine hood reaches the position where the engine hood and a fender are installed in a matched mode; adjusting the position of the vehicle door by taking the engine hood and the side wall A column as a reference, so that the vehicle door and the side wall A column can be matched with the fender; a fender is assembled in the final assembly stage, wherein a fender support is assembled on an end plate of a front cross beam of a cabin; the headlamp and the fender are pre-installed on the automobile body, and the front portion of the fender is connected to the fender support; adjusting a gap and a surface difference between the fender and a side wall A column, adjusting a surface difference between the fender and a vehicle door and adjusting a gap and a surface difference between the fender and an engine hood in sequence, and locking the fender and a headlamp on a vehicle body after the adjustment is finished. The invention provides a complete solution for the appearance precision of the fender, the engine hood, the vehicle door and the side wall.

Description

Technical Field

[0001] This invention relates to the field of automobile assembly technology, and in particular to a method for adjusting and assembling a fender and a vehicle thereof. Background Technology

[0002] In the automotive manufacturing industry, the mainstream method for forming front fenders is by stamping steel sheets. These sheets are welded to the body-in-white in the welding workshop, then proceed to the painting workshop for electrophoresis and topcoat painting. After painting, the body-in-white enters the final assembly line for parts assembly. This fender forming method is suitable for mass production, possessing high strength and high precision. However, when the fender design is avant-garde and complex, the stamping die limitation prevents the stamping method from achieving such complex shapes. This has led to the development of new material molding processes, such as PP injection molding or SMC molding, which can achieve complex curved surface shapes and possess high strength and lightweight characteristics.

[0003] However, since the new material fender is a non-metallic part, it cannot be electrophoretically coated during the painting stage along with the body-in-white. The fender can only be assembled and adjusted during the final assembly stage. Since the parts that are matched with the fender, such as the doors, side panels and hood of the body-in-white, are fixed during the welding stage, adjusting the matching accuracy between the fender and its related parts poses a great challenge to the industry. At present, there is no mature assembly and adjustment solution for the new material fender in the industry to solve the accuracy problem. Summary of the Invention

[0004] The purpose of this invention is to provide a fender assembly and adjustment method and vehicle. By using a fixture to simulate the position of the fender after assembly during the welding stage before the painting stage, the positions of the hood and doors can be adjusted in advance. After the painting stage, the fender is installed and its position is adjusted during the final assembly stage. This solves the precision challenge brought by the new material fender in the final assembly, addresses industry pain points, and forms a systematic and executable solution that can be applied in batches in the final assembly production workshop. It can ensure the gap and surface difference between the fender and the door, side panel and hood, and achieve the appearance precision requirements.

[0005] This invention provides the following solution:

[0006] In a first aspect, this application discloses a fender assembly and adjustment method, comprising:

[0007] S1: Adjust the position of the hood and doors during the welding stage: Limit the front of the hood, adjust the rear position of the hood with the side panel as the reference, so that the hood reaches the position to be installed with the fender; then, with the hood and the side panel A-pillar as the reference, adjust the position of the doors so that the doors and the side panel A-pillar can be installed with the fender.

[0008] S2: Fender assembly during the final assembly stage: Assemble the fender bracket onto the front crossbeam end plate of the engine compartment; pre-install the headlights and fenders onto the vehicle body, and connect the front part of the fender to the fender bracket; adjust the gap and surface difference between the fender and the side A-pillar, the surface difference between the fender and the door, and the gap and surface difference between the fender and the hood in sequence. After the adjustment is completed, lock the fender and headlights onto the vehicle body.

[0009] Preferably, step S1 includes:

[0010] S101: Install the hood positioning device on the front panel of the nacelle and support it at the front of the nacelle. Place the front part of the hood inside the front of the nacelle so that the X, Y and Z directions of the front part of the hood are limited by the hood positioning device.

[0011] S102: First, position the fender positioning fixture on the vehicle body, and then fix it at the installation position of the fender. At this time, the fender contour surface of the fender positioning fixture reaches the theoretical position of the fender. After adjusting the gap between the rear of the hood and the fender contour surface of the fender positioning fixture to meet the requirements, fix the hood.

[0012] S103: Pre-install the car door onto the car body via the door hinges. Using the side A-pillar and hood as references, limit the door positioning device on the door and hood. At this time, the second fender positioning block of the door positioning device reaches the theoretical position of the fender. Measure the gap between the second fender positioning block of the door positioning device and the side A-pillar, and the difference between the actual and theoretical dimensions of the alignment with the side A-pillar. Adjust the relative position of the door hinges and the car body to make the door reach the theoretical position.

[0013] Preferably, step S2 specifically includes:

[0014] S201: Position and install the fender bracket positioning fixture on the front crossbeam end plate of the vehicle body; position and install the fender bracket on the fender bracket positioning fixture; fasten the fender bracket to the front crossbeam end plate of the vehicle body, and remove the fender bracket positioning fixture.

[0015] S202: Pre-install the headlights and fenders into the corresponding positions on the vehicle body, and connect the front of the fenders to the fender brackets;

[0016] S203: Adjust the gap and surface difference between the fender and the side A-pillar;

[0017] S204: Using the rear side panel as a reference, first adjust the surface difference between the rear door and the rear side panel to meet the requirements, then adjust the surface difference between the front door and the rear door to meet the requirements, and finally adjust the surface difference between the fender and the front door to meet the requirements.

[0018] S205: Adjust the gaps and surface differences between the fenders, hood, and headlights.

[0019] Preferably, step S101 specifically includes:

[0020] The hood positioning device is installed on the front panel of the engine compartment through the hood positioning device precision positioning pin and the body positioning hole. It is supported at the front of the engine compartment by the first Z-axis positioning surface, the second Z-axis positioning surface, and the third Z-axis positioning surface of the hood positioning device. The hood positioning device clamping mechanism fixes the hood positioning device at the front of the engine compartment.

[0021] The front part of the hood is placed inside the front of the cabin. The front end of the hood abuts against the X-direction limiting surface of the hood positioning device, the side end of the hood abuts against the Y-direction limiting surface of the hood positioning device, and the lower end of the hood is placed above the first Z-direction positioning surface and the second Z-direction positioning surface of the hood positioning device.

[0022] Preferably, step S102 specifically includes:

[0023] The fender positioning fixture is positioned on the vehicle body by the first Y-direction positioning surface, the second Y-direction positioning surface, the third Y-direction positioning surface, and the Y-direction positioning pin. The fender positioning fixture is fixed to the vehicle body by the Z-direction positioning pin and the threaded pin. At this time, the fender contour surface of the fender positioning fixture is located at the theoretical installation position of the fender.

[0024] The lower rear end of the hood is placed on the hood hinge, which is fixed to the vehicle body, thus completing the Z-direction limitation of the rear of the hood. The rear of the hood abuts against the Y-direction limiting surface of the hood on the fender positioning fixture, thus completing the Y-direction limitation of the rear of the hood. After adjusting the position of the hood so that the XY-direction gap between the hood and the fender contour surface of the fender positioning fixture meets the requirements, the hood is fixed and the fender positioning fixture and the hood positioning fixture are removed.

[0025] Preferably, step S103 specifically includes:

[0026] The car door is pre-installed onto the door hinges of the car body;

[0027] The door positioning fixture abuts against the hood via the Y-direction profile of the fender-like positioning block, and is clamped onto the door by the Y-direction clamping device and the Y-direction clamping part of the limiting block, thus completing the Y-direction limiting of the door positioning fixture; it is clamped onto the body frame by the Z-direction clamping device, thus completing the Z-direction limiting of the door positioning fixture; the Z-direction limiting of the door positioning fixture is completed by pressing the Z-direction profile of the first fender-like positioning block onto the edge of the door; and the X-direction positioning of the door positioning fixture is completed by abutting against the front edge of the door by the X-direction profile of the limiting block.

[0028] Measure whether the gap between the second fender positioning block of the door positioning fixture and the side A-pillar is qualified. If the gap is qualified, the door X-direction position is qualified. If not, loosen the connecting bolts between the door hinge and the body and fine-tune the door position until the gap is qualified.

[0029] Measure the difference between the actual and theoretical dimensions of the alignment between the second fender positioning block of the door positioning fixture and the side A-pillar to determine the Y-axis adjustment amount of the door. Loosen the connecting bolts between the door hinge and the body and make fine adjustments until the alignment dimensions are qualified. Fix the door to the body and remove the door positioning fixture.

[0030] Preferably, step S203 specifically includes:

[0031] An X-direction fastening bracket is provided on the body corresponding to the right side of the fender. The X-direction fastening bracket has a first fender fixing hole. The fender is pre-installed in the first fender fixing hole of the body to complete the X-direction limitation of the fender.

[0032] The side A-pillar has a sixth fender fixing hole. Adjust the relative position of the fender and the sixth fender fixing hole until the Z-direction of the fender is aligned with the side A-pillar, and then fix the fender in the sixth fender fixing hole.

[0033] A Y-axis fastening bracket is provided on the upper right side of the fender corresponding to the position on the body. The Y-axis fastening bracket has a fifth fender fixing hole. Adjust the relative position of the fender and the fifth fender fixing hole of the body until the surface difference between the fender and the side A-pillar is qualified, and then fix the fender on the fifth fender fixing hole.

[0034] Preferably, step S204, adjusting the surface difference between the fender and the door, specifically includes:

[0035] After the fender is adjusted to meet the Y-direction surface difference with the front door through the first fender fixing hole, the fender is fixed on the first fender fixing hole; wherein, the first fender fixing hole is a through hole design in the YZ direction;

[0036] A Z-axis bracket is provided on the body corresponding to the lower part of the fender. The Z-axis bracket has a second fender fixing hole. After adjusting the surface difference between the lower part of the fender and the door in the Y direction to meet the requirements, the fender is fixed on the second fender fixing hole. The second fender fixing hole is a through hole design in the XY direction.

[0037] Preferably, step S205 specifically includes:

[0038] The body has a third fender mounting hole at the position corresponding to the edge of the headlight, and at least three fourth fender mounting holes with through holes in the XY direction at the position corresponding to the upper part of the fender.

[0039] Adjust the fender in the Y direction until the Y-direction gap with the headlight is acceptable, and then fix the fender in the third fender fixing hole;

[0040] Adjust the fender in the Y direction until the gap with the hood in the Y direction is acceptable, and fix the fender to one of the fourth fender mounting holes; then lock the headlights to the body and fix the fenders to the remaining fourth fender mounting holes;

[0041] Screw the Z-direction limiting block into the inner side of the hood and adjust the screwing length until the surface difference between the fender and the hood is acceptable.

[0042] Secondly, this application also describes a vehicle including a fender that has been installed and adjusted using the aforementioned fender installation and adjustment method.

[0043] Compared with the prior art, the present invention has the following advantages:

[0044] 1. Since the new material fender (PP engineering plastic + SMC composite material) can only be assembled in the final assembly stage after the painting stage, but the hood and doors cannot be adjusted during the final assembly stage, this application uses a fixture to simulate the position of the fender after assembly in the welding stage before the painting stage, adjusts the position of the hood and doors in advance, and installs and adjusts the position of the fender in the final assembly stage after the painting stage. This solves the precision challenge brought by the new material fender in the final assembly, solves the industry pain point, and provides a complete solution for the appearance precision of the fender, hood, doors and side panels. It can be mass-produced and applied to the production workshop, laying the foundation for the popularization of the new material fender.

[0045] 2. This application utilizes multiple mounting surfaces, precision positioning pins, and body positioning holes of the hood positioning fixture to position it at the front of the engine compartment. After the front of the hood is placed on the hood positioning fixture, it can be quickly positioned at the front of the engine compartment without adjustment to achieve the expected installation effect.

[0046] 3. This application uses a fender positioning fixture with the side panel as a reference to limit the hood to the theoretical position, ensuring the Y-direction position accuracy of the rear of the hood. At the same time, by using the fender contour surface as the fender in the theoretical position, the matching quality between the fender contour surface and the hood can be verified, and problems after fender assembly can be identified and avoided in advance.

[0047] 4. This application installs a door positioning device on the car door and uses the already positioned hood as a reference. By measuring the gap and alignment dimensions between the fender contour block and the side A-pillar, the positional accuracy of the car door is adjusted, thereby achieving a gap between the hood and the car door relative to the side and fender within ±0.5mm. Attached Figure Description

[0048] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0049] Figure 1 A schematic diagram of the structure of the hairnet positioning device;

[0050] Figure 2 A schematic diagram of the fender positioning fixture;

[0051] Figure 3 A structural diagram of a door positioning device;

[0052] Figure 4 A schematic diagram of the fender bracket assembly;

[0053] Figure 5 A schematic diagram showing the positions of the fender mounting holes when the fender is fixed to the vehicle body;

[0054] Figure 6 A schematic diagram of the structure of the car door leveling device;

[0055] In the picture:

[0056] 11. Hair cover positioning device, hair cover Y-direction limiting surface; 12. Hair cover positioning device clamping mechanism; 13. First hair cover Z-direction positioning surface; 14. Hair cover positioning device precision positioning pin; 15. Hair cover X-direction limiting surface; 16. Second hair cover Z-direction positioning surface; 17. Hair cover positioning device first Z-direction positioning surface; 18. Hair cover positioning device second Z-direction positioning surface; 19. Hair cover positioning device third Z-direction positioning surface;

[0057] 21. First Y-direction locating pin of fender positioning fixture; 22. First Y-direction locating surface of fender positioning fixture; 23. Second Y-direction locating pin of fender positioning fixture; 24. Threaded pin of fender positioning fixture; 25. Second Y-direction locating surface of fender positioning fixture; 26. Z-direction locating pin of fender positioning fixture; 27. Third Y-direction locating surface of fender positioning fixture; 28. Y-direction limiting surface of fender positioning fixture; 29. ​​Fender contour surface of fender positioning fixture;

[0058] 31. Door positioning fixture, door Y-axis clamping device; 32. Door positioning fixture, limiting block; 33. Door positioning fixture, first fender-like positioning block; 34. Door positioning fixture, second fender-like positioning block; 35. Door positioning fixture, third fender-like positioning block; 36. Door positioning fixture, Z-axis clamping device; 37. Door positioning fixture, fourth fender-like positioning block;

[0059] 41. First positioning pin of fender bracket positioning fixture; 42. Clamping mechanism of fender bracket positioning fixture; 43. Second positioning pin of fender bracket positioning fixture; 44. First positioning pin of fender bracket; 45. Second positioning pin of fender bracket; 46. Magnetic positioning block of fender bracket positioning fixture; 47. Positioning retraction mechanism of fender bracket positioning fixture;

[0060] 5. Front crossbeam end plate;

[0061] 6. Fender bracket; 61. Fender bracket fastening holes;

[0062] 7. Fender; 7-1. First fender mounting hole; 7-2. Second fender mounting hole; 7-3. Third fender mounting hole; 7-4. Fourth fender mounting hole; 7-5. Fifth fender mounting hole; 7-6. Sixth fender mounting hole;

[0063] 81. Door opening sheet metal tightening shaft; 82. First door opening sheet metal clamping surface; 83. Second door opening sheet metal clamping surface; 84. Door leveling support surface; 85. Door leveling tightening shaft; 86. First internal thread part; 87. Second internal thread part. Detailed Implementation

[0064] To make the objectives, technical solutions, and advantages of this application clearer, the application will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0065] The terminology used in the embodiments of this application is for the purpose of describing particular embodiments only and is not intended to limit the application. The singular forms “a,” “said,” and “the” used in the embodiments of this application and the appended claims are also intended to include the plural forms, and “multiple” generally includes at least two unless the context clearly indicates otherwise.

[0066] It should be understood that the term "and / or" used in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.

[0067] It should be understood that although the terms first, second, third, etc., may be used in the embodiments of this application, these descriptions should not be limited to these terms. These terms are only used to distinguish the descriptions. For example, first may also be referred to as second without departing from the scope of the embodiments of this application, and similarly, second may also be referred to as first.

[0068] Depending on the context, the words “if” or “suppose” as used here can be interpreted as “when” or “in response to determination” or “in response to detection.” Similarly, depending on the context, the phrases “if determination” or “if detection (of the stated condition or event)” can be interpreted as “when determination” or “in response to determination” or “when detection (of the stated condition or event)” or “in response to detection (of the stated condition or event).”

[0069] It should also be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that an article or device that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such an article or device. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the article or device that includes said element.

[0070] It should be noted that any symbols and / or numbers present in the specification that are not marked in the accompanying drawings are not reference numerals.

[0071] Example 1

[0072] See Figure 1-6 As shown in the figure, this application provides a fender assembly and adjustment method, including:

[0073] S1: Adjust the position of the hood and doors during the welding stage: Limit the front of the hood, adjust the rear position of the hood with the side panel as the reference, so that the hood reaches the position to be installed with the fender; then, with the hood and the side panel A-pillar as the reference, adjust the position of the doors so that the doors and the side panel A-pillar can be installed with the fender.

[0074] S2: Fender assembly during the final assembly stage: Assemble the fender bracket onto the front crossbeam end plate of the engine compartment; pre-install the headlights and fenders onto the vehicle body, and connect the front part of the fender to the fender bracket; adjust the gap and surface difference between the fender and the side A-pillar, the surface difference between the fender and the door, and the gap and surface difference between the fender and the hood in sequence. After the adjustment is completed, lock the fender and headlights onto the vehicle body.

[0075] Since the new material fender (PP engineering plastic + SMC composite material) can only be assembled in the final assembly stage after the painting stage, but the hood and doors cannot be adjusted during the final assembly stage, this application uses a fixture to simulate the position of the fender after assembly in the welding stage before the painting stage, adjusts the position of the hood and doors in advance, and installs and adjusts the position of the fender in the final assembly stage after the painting stage. This solves the precision challenge brought by the new material fender in the final assembly and solves the pain point of the industry.

[0076] See Figure 1-3 As shown, S101: Install the hood positioning device on the front panel of the nacelle and support it at the front of the nacelle. Place the front part of the hood inside the front part of the nacelle so that the X, Y and Z directions of the front part of the hood are all limited by the hood positioning device.

[0077] S102: First, position the fender positioning fixture on the vehicle body, and then fix it at the installation position of the fender. At this time, the fender contour surface 29 of the fender positioning fixture reaches the theoretical position of the fender. After adjusting the gap between the rear of the hood and the fender contour surface 29 of the fender positioning fixture to meet the requirements, fix the hood.

[0078] S103: Pre-install the car door onto the car body via the door hinges. Using the side A-pillar and hood as references, limit the door positioning device on the door and hood. At this time, the second fender positioning block 34 of the door positioning device reaches the theoretical position of the fender. Measure the gap between the second fender positioning block 34 of the door positioning device and the side A-pillar, and the difference between the actual and theoretical dimensions of the alignment with the side A-pillar. Adjust the relative position of the door hinges and the car body to make the door reach the theoretical position.

[0079] This application utilizes multiple positioning surfaces, precision positioning pins, and body positioning holes of the hood positioning fixture to position it at the front of the engine compartment. After the front of the hood is placed into the hood positioning fixture, it achieves rapid positioning at the front of the engine compartment without adjustment, achieving the desired assembly effect. Using a fender positioning fixture with the side panel as a reference, the rear of the hood is theoretically limited, ensuring the Y-axis positional accuracy of the rear of the hood. Simultaneously, using the fender contour surface as the theoretical position of the fender, the good matching between the fender contour surface and the hood can be verified, allowing for early identification and avoidance of problems after fender assembly. A door positioning fixture is installed on the door, using the already positioned hood as a reference. The positional accuracy of the door is adjusted by measuring the gap and alignment dimensions between the fender contour block and the side panel A-pillar, thereby achieving a gap between the hood and door relative to the side panel and fender within ±0.5mm.

[0080] See Figure 4-6 As shown, step S2 specifically includes:

[0081] Step S2 specifically includes:

[0082] S201: Position and install the fender bracket positioning fixture on the front crossbeam end plate 5 of the vehicle body; position and install the fender bracket 6 on the fender bracket positioning fixture; fasten the fender bracket 6 to the front crossbeam end plate 5 of the vehicle body, and remove the fender bracket positioning fixture.

[0083] S202: Pre-install the headlights and fenders into the corresponding positions on the vehicle body, and connect the front of the fenders to the fender bracket 6;

[0084] S203: Adjust the gap and surface difference between the fender and the side A-pillar;

[0085] S204: Using the rear side panel as a reference, first adjust the surface difference between the rear door and the rear side panel to meet the requirements, then adjust the surface difference between the front door and the rear door to meet the requirements, and finally adjust the surface difference between the fender and the front door to meet the requirements.

[0086] S205: Adjust the gaps and surface differences between the fenders, hood, and headlights.

[0087] See Figure 1 As shown, step S101 specifically includes:

[0088] The hood positioning device is installed on the front panel of the engine compartment through the hood positioning device precision positioning pin 14 and the body positioning hole. It is supported at the front of the engine compartment by the first Z-direction positioning surface 17, the second Z-direction positioning surface 18, and the third Z-direction positioning surface 19 of the hood positioning device. The hood positioning device clamping mechanism 12 fixes the hood positioning device at the front of the engine compartment.

[0089] The front part of the hood is placed inside the front of the cabin. The front end of the hood abuts against the X-direction limiting surface 15 of the hood positioning device, and the side end of the hood abuts against the Y-direction limiting surface 11 of the hood positioning device. The lower end of the hood is placed above the first Z-direction positioning surface 13 and the second Z-direction positioning surface 16 of the hood positioning device.

[0090] This application utilizes multiple mounting surfaces, precision positioning pins, and body positioning holes of the hood positioning fixture to position it at the front of the engine compartment. After the front of the hood is placed on the hood positioning fixture, it can be quickly positioned at the front of the engine compartment without adjustment to achieve the expected installation effect.

[0091] See Figure 2 As shown, step S102 specifically includes:

[0092] The fender positioning fixture is positioned on the vehicle body via the first Y-direction positioning surface 22, the second Y-direction positioning surface 25, the third Y-direction positioning surface 27, and the Y-direction positioning pin. The fender positioning fixture is fixed to the vehicle body via the Z-direction positioning pin 26 and the threaded pin 24. At this time, the fender contour surface 29 of the fender positioning fixture is located at the theoretical installation position of the fender.

[0093] The lower rear end of the hood is placed on the hood hinge, which is fixed to the vehicle body, thus completing the Z-direction limitation of the rear of the hood. The rear of the hood abuts against the Y-direction limitation surface 28 of the fender positioning fixture, thus completing the Y-direction limitation of the rear of the hood. After adjusting the position of the hood so that the XY-direction gap between the hood and the fender contour surface 29 of the fender positioning fixture meets the requirements, the hood is fixed and the fender positioning fixture and the hood positioning fixture are removed.

[0094] This application uses a fender positioning fixture with the side panel as a reference to limit the hood to the theoretical position, ensuring the Y-axis positional accuracy of the rear of the hood. At the same time, by using the fender contour surface as the fender in the theoretical position, and verifying the good matching between the fender contour surface and the hood, problems after fender assembly can be identified and avoided in advance.

[0095] See Figure 3 As shown, step S103 specifically includes:

[0096] The car door is pre-installed onto the door hinges of the car body;

[0097] The door positioning fixture abuts against the hood via the Y-direction profile of the fender-like positioning block 37 in the door positioning fixture, and is clamped onto the door by the Y-direction clamping parts of the door positioning fixture Y-direction clamping device 31 and the door positioning fixture limiting block 32, thus completing the Y-direction limiting of the door positioning fixture; it is clamped onto the body frame by the Z-direction clamping device 36 in the door positioning fixture, thus completing the Z-direction limiting of the door positioning fixture; the Z-direction profile of the first fender-like positioning block 33 in the door positioning fixture is pressed onto the edge of the door, thus completing the Z-direction auxiliary limiting of the door positioning fixture; and the X-direction profile of the door positioning fixture limiting block 32 abuts against the front edge of the door, thus completing the X-direction positioning of the door positioning fixture.

[0098] Measure whether the gap between the second fender positioning block 34 of the door positioning fixture and the side A-pillar is qualified. If the gap is qualified, the door X-direction position is qualified. If not, loosen the connecting bolts between the door hinge and the body and make a fine adjustment to the door position until the gap is qualified.

[0099] Measure the difference between the actual and theoretical dimensions of the alignment between the second fender positioning block 34 of the door positioning fixture and the side A-pillar to determine the Y-axis adjustment amount of the door. Loosen the connecting bolts between the door hinge and the body and make fine adjustments until the alignment dimensions are qualified. Fix the door to the body and remove the door positioning fixture.

[0100] This application installs a door positioning device on the car door and uses the already positioned hood as a reference. By measuring the gap and alignment dimensions between the fender contour block and the side A-pillar, the positional accuracy of the car door is adjusted, thereby achieving a gap between the hood and the car door relative to the side and fender within ±0.5mm.

[0101] See Figure 5 As shown, step S203 specifically includes:

[0102] An X-direction fastening bracket is provided on the right side of the fender 7 on the vehicle body. The X-direction fastening bracket is provided with a first fender fixing hole 7-1. The fender 7 is pre-installed in the first fender fixing hole 7-1 of the vehicle body to complete the X-direction limitation of the fender 7.

[0103] The side A-pillar is provided with a sixth fender fixing hole 7-6. Adjust the relative position of the fender 7 and the sixth fender fixing hole 7-6 until the Z direction of the fender 7 is aligned with the side A-pillar, and fix the fender 7 in the sixth fender fixing hole 7-6.

[0104] A Y-direction fastening bracket is provided on the upper right side of the fender 7 on the vehicle body. The Y-direction fastening bracket is provided with a fifth fender fixing hole 7-5. Adjust the relative position of the fender 7 and the fifth fender fixing hole 7-5 of the vehicle body until the surface difference between the fender 7 and the side A-pillar is qualified, and then fix the fender 7 on the fifth fender fixing hole 7-5.

[0105] See Figure 5 As shown, step S204, adjusting the surface difference between the fender and the door, specifically includes:

[0106] After the fender 7 is adjusted to meet the Y-direction surface difference with the front door through the first fender fixing hole 7-1, the fender 7 is fixed on the first fender fixing hole 7-1; wherein, the first fender fixing hole 7-1 is a through hole design in the YZ direction;

[0107] A Z-axis bracket is provided on the body corresponding to the lower part of the fender 7. The Z-axis bracket has a second fender fixing hole 7-2. After adjusting the surface difference between the lower part of the fender and the door in the Y direction to meet the requirements, the fender is fixed on the second fender fixing hole 7-2. The second fender fixing hole 7-2 is a through hole design in the XY direction.

[0108] See Figure 5 As shown, step S205 specifically includes:

[0109] The body has a third fender mounting hole 7-3 at the position corresponding to the edge of the headlight, and at least three fourth fender mounting holes 7-4 with through holes in the XY direction at the position corresponding to the upper part of the fender 7.

[0110] Adjust the fender in the Y direction to ensure that the Y-direction gap with the headlight is acceptable, and then fix the fender in the third fender fixing hole 7-3;

[0111] Adjust the fender in the Y direction until the gap with the hood in the Y direction is acceptable, and fix the fender to one of the fourth fender fixing holes 7-4; then lock the headlight to the body and fix the fender to the remaining fourth fender fixing holes 7-4.

[0112] Screw the Z-direction limiting block of the hood into the inner side of the hood and adjust the length of screwing until the surface difference between the fender 7 and the hood is acceptable.

[0113] Example 2

[0114] This application provides a specific fender assembly and adjustment process.

[0115] Since the components that need to be matched with the fender include the door, hood, headlights, and side panels, in order to avoid excessive dimensional deviations between components that could lead to adjustment failures, the solution includes two steps. The first step is to adjust the relative positions of the door, hood, and side panels in the welding workshop. The second step is to assemble and adjust the new material fenders in the final assembly workshop to ensure that their appearance is in good working order with the door, hood, headlights, and side panels.

[0116] Step 1 Welding and Assembly Plan:

[0117] 1. First, the engine hood (hereinafter referred to as the hood) is assembled. Due to the large shape of the hood, a hood positioning fixture is used to limit the front XYZ direction of the hood. The rear of the hood is adjusted based on the fender positioning fixture. Then, the door hinges are precisely installed and positioned using a hinge installation fixture (this fixture is prior art and will not be described in detail in this application) to ensure the consistency of the initial position of the door hinges and reduce the amount of subsequent adjustment between the door and the hinges. After that, the gap difference between the door and the side panel is checked, and the connecting bolts between the door hinges and the body are finely adjusted.

[0118] 1.1 Based on the theoretical position of the hair mask, a hair mask positioning device is used to limit the front of the hair mask. The specific process is as follows:

[0119] Figure 1The left side of the hood positioning device is symmetrical to the right side. Taking the positioning process of the front left side of the hood as an example, the hood positioning device is positioned on the front panel of the engine compartment through the precision positioning pin 14 and the body positioning hole. The hood positioning device is stably supported at the front of the engine compartment through the first Z-direction positioning surface 17, the second Z-direction positioning surface 18, and the third Z-direction positioning surface 19. Then, the clamping clamp and clamping head of the hood positioning device clamping mechanism 12 are used to lock and fix the hood positioning device. The front part of the engine cover is placed at the front of the engine compartment. The front left side of the engine cover is placed against the X-direction limiting surface 15 of the engine cover positioning device to achieve X-direction positioning of the engine cover. The left front part of the engine cover is placed against the Y-direction limiting surface 11 of the engine cover positioning device to achieve Y-direction positioning of the engine cover. The lower left side of the engine cover rests on the first Z-direction positioning surface 13 and the second Z-direction positioning surface 16 of the engine cover to achieve Z-direction positioning of the left front part of the engine cover. The positioning process of the right front part of the engine cover is the same. Thus, the XYZ-direction positioning of the front part of the engine cover on the vehicle body is completed.

[0120] 1.2 The rear of the radome is adjusted using the fender positioning fixture as a reference. The specific process is as follows:

[0121] like Figure 2 As shown, the fender positioning fixture is positioned on the vehicle body through three Y-axis positioning surfaces, namely the first Y-axis positioning surface 22, the second Y-axis positioning surface 25, and the third Y-axis positioning surface 27, two Y-axis positioning pins, namely the first Y-axis positioning pin 21 and the second Y-axis positioning pin 23, and body holes that can position the fender positioning fixture in the XZ direction. The fixture is fixed to the vehicle body through the Z-axis positioning pin 26 and the threaded pin 24. At this time, the fender contour surface 29 is located at the theoretical installation position of the fender. The hood is supported in the Z-direction by the hood hinge fixed to the vehicle body. In the Y-direction by the fender positioning fixture, the hood is limited by the Y-direction limiting surface 28 of the fender positioning fixture. A gap gauge is used to check whether the XY-direction gap between the fender contour surface 29 and the hood is qualified. The XY-direction gap of the hood is finely adjusted to the qualified range. At this time, the rear dimension of the hood has been adjusted to be qualified. The hood is tightened with a closing fastening tool. The hood installation and adjustment are completed. The fender positioning fixture and the hood positioning fixture are removed.

[0122] 1.3 After the hood assembly is completed, since the side A-pillar is a fixed and non-adjustable structure on the vehicle body, the door is pre-assembled. Then, a door positioning fixture is used to precisely position and adjust the door using the side A-pillar and hood as references to ensure that the door achieves the theoretical positional accuracy. The specific process is as follows:

[0123] like Figure 3As shown, the Y-direction of the door positioning device is limited by the Y-direction profile of the fender positioning block 37 of the door positioning device contacting the hood. The third fender positioning block 35 of the door positioning device ensures that the gap between the rear fender and the hood is qualified at this position, and ensures that the gap between the fender and the hood remains qualified when the door is adjusted. Since the hood has been adjusted to the correct position and the positional accuracy is acceptable, the Y-axis of the hood is used as a reference to limit the Y-axis position of the door positioning fixture. Then, the door is clamped in the Y-axis direction by the Y-axis clamping part of the door positioning fixture Y-axis clamping device 31 and the door positioning fixture limiting block 32 to achieve Y-axis positioning of the door positioning fixture. The Z-axis position of the door positioning fixture is clamped and fixed to the body bracket by the door positioning fixture Z-axis clamping device 36 to achieve Z-axis limiting, and is pressed against the edge of the door by the Z-axis profile of the first fender positioning block 33 of the door positioning fixture to achieve Z-axis auxiliary limiting. The X-axis position of the fixture is achieved by the X-axis profile of the door positioning fixture limiting block 32 abutting against the front edge of the door.

[0124] The adjustment principle is as follows: After the door positioning fixture is positioned by the hood, body bracket, and front door, the X-axis position of the fixture is determined by the X-axis position of the door because the fixture's X-axis position is limited by the door positioning fixture limit block 32 contacting the door's X-axis edge. At this time, the X-axis position of the door can be confirmed by judging whether the gap between the second fender positioning block 34 of the door positioning fixture and the side A-pillar is qualified. When the gap is qualified, the X-axis position of the door is qualified. When the gap is greater than the design size, the X-axis position of the door is out of tolerance by the same size. The same applies if the gap is smaller than the design size. At this time, the X-axis adjustment amount of the door can be determined based on the difference between the actual size of the gap and the theoretical gap size. Loosen the connecting bolts between the door hinge and the body to fine-tune the door position, and re-inspect until the gap size is qualified. The Y-direction profile of the first fender positioning block 33 is made by mimicking the fender profile. The first fender positioning block 33 and the Y-direction profile of the door are adjusted to the theoretical position of the fender. Then, the two Y-direction clamping devices 31 at the rear of the fixture and the Y-direction clamping part of the door positioning fixture limit block 32 are fixed to the door. The Y-direction position of the fixture is determined by the door. At this time, the line dimension of the second fender positioning block 34 of the fixture and the side A-pillar is the Y-direction position dimension of the door. The difference between the actual dimension and the theoretical dimension of the line can be used to determine the Y-direction adjustment amount of the door. Loosen the door hinge and the connecting bolt of the door to fine-tune the door position and re-inspect until the line dimension is qualified. The door adjustment is completed and the door positioning fixture is removed.

[0125] In this embodiment, the X-direction surface of the door positioning fixture limiting block 32 can abut against the edge of the door along the X-axis direction, and the Y-direction clamping part of the door positioning fixture limiting block 32 can also clamp the door along the Y-axis direction.

[0126] Second step: Fender assembly plan

[0127] 2.1 First, the fender bracket is assembled. The fender bracket is mounted on the end plate of the front crossbeam in the nacelle and is used to control the Y-direction clearance between the front of the fender and the headlight. To ensure consistency during assembly, a fender bracket positioning fixture is used to assemble the fender bracket. The specific process is as follows:

[0128] like Figure 4 As shown, the operation process is as follows: First, the fender bracket positioning fixture is positioned on the hole in the front crossbeam end plate of the vehicle body using the first positioning pin 41, the second positioning pin 43, and the positioning pin surface. The fixture is then fixed to the front crossbeam end plate using clamps. Next, the fender bracket is placed on the fixture, and precise positioning is achieved within the fender bracket hole using the first positioning pin 44 and the second positioning pin 45. A magnetic positioning block 46 is used to assist in fixing the fender bracket to the fixture. Finally, two bolts are used to fasten the fender bracket 6 to the front crossbeam end plate 5 of the vehicle body through the fastening hole 61. Pulling down the handle of the positioning and retraction mechanism 47 will cause the first positioning pin 44 and the second positioning pin 45 of the fender bracket to move downward along the Z direction, separating them from the fender bracket hole. This will also open the clamp of the fender bracket positioning fixture clamping mechanism 42, allowing the fender bracket positioning fixture to be removed from the vehicle body. In this embodiment, each of the first positioning pin 44 and the second positioning pin 45 of the fender bracket in the positioning and retraction mechanism 47 has a spring in the middle. When the handle of the positioning and retraction mechanism 47 is pulled down, it will cause the two positioning pins to compress the springs downward and separate them from the fender bracket hole. After releasing the handle, the springs will restore their deformation and push the two positioning pins back to their initial state.

[0129] 2.2 Then, the headlights and fenders are pre-installed onto the vehicle body, and the fender installation and adjustment begin. First, the gap and surface difference between the fender and the side A-pillar are adjusted, then the surface difference between the fender and the door is adjusted, and finally the gap and surface difference between the fender and the hood are adjusted.

[0130] 2.2.1 Adjustment of fenders and side A-pillars:

[0131] like Figure 5 First, the fender 7 is pre-positioned at the two first fender fixing holes 7-1 of the X-direction fastening bracket on the vehicle body. Pre-positioning means screwing in the connecting bolts but not tightening them. At this time, the X-direction position of the fender is determined. Adjust the relative position of the fender 7 and the Y-direction fastening point at the A-pillar of the side wall, i.e., the sixth fender fixing hole 7-6, so that the Z-direction adjustment of the fender is aligned with the A-pillar of the side wall. Lock the fender 7 and the sixth fender fixing hole 7-6. Then, adjust the relative position of the fender 7 and the fifth fender fixing hole 7-5 of the Y-direction fastening bracket on the vehicle body so that the surface difference between the fender and the A-pillar of the side wall is qualified. Lock the fender 7 and the fifth fender fixing hole 7-5. The adjustment is complete.

[0132] 2.2.2. Adjustment of the surface difference between the fender and the door:

[0133] Using the rear side panel as a reference, first adjust the surface difference between the rear door and the rear side panel to ensure it is within acceptable limits, then adjust the surface difference between the front door and the rear door to ensure it is within acceptable limits, and finally adjust the surface difference between the fender and the front door to ensure it is within acceptable limits. Since the door locks and limit blocks were not installed during adjustment, a door leveling fixture was used.

[0134] like Figure 6 As shown, the door leveling fixtures are installed on the rear door opening sheet metal and the front door opening sheet metal respectively. The door opening sheet metal tightening shaft 81 rotates in the first internal thread 86, so that the first door opening sheet metal clamping surface 82 and the second door opening sheet metal clamping surface 83 of the door leveling fixture are clamped on both sides of the door opening sheet metal, so that the door leveling fixture is fixed on the door opening sheet metal. Then the rear door is closed, and the door leveling tightening shaft 85 rotates in the second internal thread 87, so that the door leveling support surface 84 lifts the door in the Y direction until the Y-direction surface difference between the rear door and the rear side wall is qualified. The leveling method of the front door and the rear door is the same.

[0135] With the front and rear doors leveled, the difference in surface area between the fenders and the front doors can then be adjusted. Figure 5 As shown, since the two first fender fixing holes 7-1 are through holes in the YZ direction, after adjusting the fender and the front door surface difference in the Y direction to meet the requirements, the fender is locked to the first fender fixing holes 7-1. A Z-direction bracket is provided on the vehicle body at the position corresponding to the lower part of the fender. The Z-direction bracket has two Z-direction fastening points, namely the second fender fixing holes 7-2, which are through holes in the XY direction. After adjusting the lower part of the fender and the door surface difference in the Y direction to meet the requirements, the fender and the second fender fixing holes 7-2 are locked. At this point, the surface difference between the fender and the door has been adjusted to meet the requirements.

[0136] 2.2.2. Adjustment of the gap and surface difference between the fender, engine hood, and headlights:

[0137] like Figure 5As shown, a third fender mounting hole 7-3 is provided on the body corresponding to the edge of the headlight. Adjust the fender in the Y direction until the Y-direction gap with the headlight is acceptable, and then fix the fender in the third fender mounting hole 7-3. On the body corresponding to the upper part of the fender 7, there are three fourth fender mounting holes 7-4 with through holes in the XY direction. Adjust the fender in the Y direction until the Y-direction gap with the hood is acceptable, and then fix the fender in one of the fourth fender mounting holes 7-4. Then, lock the headlight to the body and fix the fender in the remaining fourth fender mounting holes 7-4. The external dimensions of the fender and the hood are mainly controlled through three Z-direction fastening points, namely the fourth fender fixing hole 7-4. The XY direction of the fourth fender fixing hole 7-4 is a through hole. Since the fender in the X direction has been limited by the first fender fixing hole 7-1 at the door, it is only necessary to adjust the fender in the Y direction to meet the Y direction gap with the hood, and then fasten the three fourth fender fixing points 7-4 in place.

[0138] Then, screw the Z-axis limiting rubber block of the engine cover into the inner surface of the engine cover. Since the limiting rubber block is supported between the engine cover and the body below the engine cover, the depth of the limiting rubber block screwed into the engine cover determines the Z-axis height after the engine cover is lowered. Repeatedly open and close the engine cover and rotate the limiting rubber block until the surface difference between the fender and the engine cover is qualified.

[0139] Example 3

[0140] This application provides a vehicle including a fender that has been installed and adjusted using the fender installation and adjustment method described above.

[0141] Finally, it should be noted that the various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the systems or apparatus disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the descriptions are relatively simple, and relevant parts can be referred to the method section.

[0142] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application 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 this application.

Claims

1. A method for adjusting a fender, characterized in that, include: S1: Adjust the position of the hood and doors during the welding stage: Limit the front of the hood, adjust the rear position of the hood with the side panel as the reference, so that the hood reaches the position to be installed with the fender; then, with the hood and the side panel A-pillar as the reference, adjust the position of the doors so that the doors and the side panel A-pillar can be installed with the fender. S2: Fender assembly during the final assembly stage: Assemble the fender bracket onto the front crossbeam end plate of the engine compartment; pre-install the headlights and fenders onto the vehicle body, and connect the front part of the fender to the fender bracket; adjust the gap and surface difference between the fender and the side A-pillar, the surface difference between the fender and the door, and the gap and surface difference between the fender and the hood in sequence. After the adjustment is completed, lock the fender and headlights onto the vehicle body.

2. The fender assembly and adjustment method according to claim 1, characterized in that, The S1 step specifically includes: S101: Install the hood positioning device on the front panel of the nacelle and support it at the front of the nacelle. Place the front part of the hood inside the front of the nacelle so that the X, Y and Z directions of the front part of the hood are limited by the hood positioning device. S102: First, position the fender positioning fixture on the vehicle body, and then fix it at the installation position of the fender. At this time, the fender contour surface (29) of the fender positioning fixture reaches the theoretical position of the fender. After adjusting the gap between the rear of the hood and the fender contour surface (29) of the fender positioning fixture to meet the requirements, fix the hood. S103: Pre-install the car door on the car body through the door hinge. Using the side A-pillar and the hood as a reference, limit the door positioning device on the door and the hood. At this time, the second fender positioning block (34) of the door positioning device reaches the theoretical position of the fender. Measure the gap between the second fender positioning block (34) of the door positioning device and the side A-pillar, and the difference between the actual size and the theoretical size of the line with the side A-pillar. Adjust the relative position of the door hinge and the car body so that the door reaches the theoretical position.

3. The fender assembly and adjustment method according to claim 1, characterized in that, The S2 step specifically includes: S201: Position and install the fender bracket positioning fixture on the front crossbeam end plate (5) of the vehicle body; position and install the fender bracket (6) on the fender bracket positioning fixture; fasten the fender bracket (6) to the front crossbeam end plate (5) of the vehicle body, and remove the fender bracket positioning fixture; S202: Pre-install the headlights and fenders into the corresponding positions on the vehicle body, and connect the front of the fenders to the fender bracket (6); S203: Adjust the gap and surface difference between the fender and the side A-pillar; S204: Using the rear side panel as a reference, first adjust the surface difference between the rear door and the rear side panel to meet the requirements, then adjust the surface difference between the front door and the rear door to meet the requirements, and finally adjust the surface difference between the fender and the front door to meet the requirements. S205: Adjust the gaps and surface differences between the fenders, hood, and headlights.

4. The fender assembly and adjustment method according to claim 2, characterized in that, The S101 step specifically includes: The hood positioning device is installed on the front panel of the engine compartment through the hood positioning device precision positioning pin (14) and the body positioning hole. It is supported at the front of the engine compartment by the first Z-direction positioning surface (17), the second Z-direction positioning surface (18), and the third Z-direction positioning surface (19) of the hood positioning device. The hood positioning device clamping mechanism (12) fixes the hood positioning device at the front of the engine compartment. The front part of the hood is placed inside the front part of the cabin. The front end of the hood abuts against the X-direction limiting surface (15) of the hood positioning device, and the side end of the hood abuts against the Y-direction limiting surface (11) of the hood positioning device. The lower end of the hood is placed above the first Z-direction positioning surface (13) and the second Z-direction positioning surface (16) of the hood positioning device.

5. The fender assembly and adjustment method according to claim 2, characterized in that, The S102 step specifically includes: The fender positioning fixture is positioned on the vehicle body by the first Y-direction positioning surface (22), the second Y-direction positioning surface (25), the third Y-direction positioning surface (27), and the Y-direction positioning pin. The fender positioning fixture is fixed to the vehicle body by the Z-direction positioning pin (26) and the threaded pin (24). At this time, the fender contour surface (29) of the fender positioning fixture is located at the theoretical installation position of the fender. The lower rear end of the hood is placed on the hood hinge, which is fixed to the vehicle body. The rear of the hood abuts against the Y-direction limiting surface (28) of the hood on the fender positioning fixture. After adjusting the position of the hood so that the XY direction gap between the hood and the fender contour surface (29) of the fender positioning fixture meets the requirements, the hood is fixed and the fender positioning fixture and the hood positioning fixture are removed.

6. The fender assembly and adjustment method according to claim 2, characterized in that, The S103 step specifically includes: The car door is pre-installed onto the door hinges of the car body; The door positioning fixture abuts against the hood via the Y-direction surface of the door positioning fixture fender positioning block (37), and is clamped to the door via the Y-direction clamping part of the door positioning fixture door Y-direction clamping device (31) and the door positioning fixture limiting block (32); it is clamped to the body bracket via the door positioning fixture Z-direction clamping device (36); the Z-direction surface of the door positioning fixture first fender positioning block (33) is pressed to the edge of the door; and the X-direction surface of the door positioning fixture limiting block (32) abuts against the front edge of the door. Measure whether the gap between the second fender positioning block (34) of the door positioning fixture and the side A-pillar is qualified. If the gap is qualified, the door X-direction position is qualified. If not, loosen the connecting bolts between the door hinge and the body and make a fine adjustment to the door position until the gap is qualified. Measure the difference between the actual and theoretical dimensions of the alignment between the second fender positioning block (34) of the door positioning fixture and the side A-pillar, determine the Y-axis adjustment amount of the door, loosen the connecting bolts of the door hinge and the body and make fine adjustments until the alignment dimension is qualified, fix the door to the body and remove the door positioning fixture.

7. The fender assembly and adjustment method according to claim 3, characterized in that, Step S203 specifically includes: An X-direction fastening bracket is provided on the right side of the fender (7) on the vehicle body. The X-direction fastening bracket is provided with a first fender fixing hole (7-1). The fender (7) is pre-installed in the first fender fixing hole (7-1) of the vehicle body to complete the X-direction limitation of the fender (7). The side A-pillar is provided with a sixth fender fixing hole (7-6). Adjust the relative position of the fender (7) and the sixth fender fixing hole (7-6) until the Z direction of the fender (7) is aligned with the side A-pillar, and fix the fender (7) on the sixth fender fixing hole (7-6). A Y-direction fastening bracket is provided at the position of the upper right protrusion of the fender (7) on the vehicle body. The Y-direction fastening bracket is provided with a fifth fender fixing hole (7-5). Adjust the relative position of the fender (7) and the fifth fender fixing hole (7-5) of the vehicle body until the surface difference between the fender (7) and the side A-pillar is qualified, and fix the fender (7) on the fifth fender fixing hole (7-5).

8. The fender assembly and adjustment method according to claim 3, characterized in that, The step S204, adjusting the surface difference between the fender and the door, specifically includes: After the fender (7) is adjusted to meet the Y-direction surface difference with the front door through the first fender fixing hole (7-1), the fender (7) is fixed on the first fender fixing hole (7-1); wherein, the first fender fixing hole (7-1) is a through hole design in the YZ direction; A Z-axis bracket is provided on the body corresponding to the lower part of the fender (7). The Z-axis bracket is provided with a second fender fixing hole (7-2). After adjusting the surface difference between the lower part of the fender and the Y-axis of the door to be qualified, the fender is fixed on the second fender fixing hole (7-2). The second fender fixing hole (7-2) is a through hole design in the XY direction.

9. The fender assembly and adjustment method according to claim 3, characterized in that, Step S205 specifically includes: The body has a third fender mounting hole (7-3) at the position corresponding to the edge of the headlight, and at least three fourth fender mounting holes (7-4) with through holes in the XY direction at the position corresponding to the upper part of the fender (7). Adjust the fender in the Y direction to ensure that the Y-direction gap with the headlight is acceptable, and then fix the fender in the third fender fixing hole (7-3); Adjust the fender in the Y direction to meet the clearance with the hood in the Y direction, and fix the fender to one of the fourth fender fixing holes (7-4); then lock the headlight to the body and fix the fender to the remaining fourth fender fixing holes (7-4); Screw the Z-direction limiting block of the hood into the inner side of the hood and adjust the length of screwing until the surface difference between the fender (7) and the hood is acceptable.

10. A vehicle, characterized in that, This includes fenders assembled using the fender assembly and adjustment method described in any one of claims 1-9.

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