A bumper assembly tool

Abstract

This utility model relates to the field of automotive assembly technology and provides a bumper assembly fixture. The fixture includes a main body and a first positioning mechanism, a magnetic fixing mechanism, and a pair of second positioning mechanisms mounted thereon. The first positioning mechanism is located in the middle of the main body and is adapted to the bumper assembly; the pair of second positioning mechanisms are symmetrically arranged at both ends of the main body and are adapted to the fenders on both sides of the vehicle body; the magnetic fixing mechanisms are arranged adjacent to the second positioning mechanisms and reliably fix the fenders to the main body of the fixture through electromagnetic adsorption. This utility model establishes a stable reference coordinate system through the symmetrically arranged second positioning mechanisms, achieves multi-point positioning in combination with the first positioning mechanism, and combines electromagnetic rapid fixing technology to successfully break the long dimension chain in traditional assembly, significantly improving the assembly accuracy of the bumper, effectively solving the problem of excessive gap and surface difference in the matching of bumpers and lights in new energy vehicles, and ensuring the consistency and stability of product quality.

Description

Technical Field

[0001] This utility model relates to the field of automobile manufacturing technology, specifically to a bumper assembly tooling. Background Technology

[0002] In current automotive assembly processes, the assembly of bumpers and lights primarily employs traditional self-positioning structures. This assembly method relies on the sequential positioning of multiple body structural components, forming a complex dimensional transfer chain. For example... Figure 1 The diagram shows the assembly position relationship between the car bumper and headlights. Figure 2 This diagram illustrates the headlight mounting positions within a more detailed automotive structural component. The assembly relationship between the bumper 12 and headlight 13 involves the coordinated positioning of multiple components, including the fender 7, fender reinforcement plate 8, shock absorber tower sheet metal 9, longitudinal beam 10, and front bumper center bracket 11. With the evolution of new energy vehicle design concepts, exterior styling is becoming increasingly simple and refined, leading to increasingly stringent requirements for the fit clearance and surface tolerances between the headlight 13 and bumper 12. To reduce the overall vehicle drag coefficient, designers require the headlights and bumper to be flush-fitted with extremely small tolerances. This design trend poses a significant challenge to traditional assembly processes, as existing methods cannot meet such high precision requirements.

[0003] The fundamental flaw of traditional assembly methods lies in their excessively long dimensional chains, leading to a significant cumulative tolerance effect. Each component involved in the positioning process has manufacturing tolerances and assembly errors, which propagate and accumulate at each level of the dimensional chain. Engineering calculations and analysis revealed that the final surface difference tolerance between the bumper and the lights exceeds ±3mm, far exceeding the design precision requirements. The soft nature of the bumper's skin material exacerbates the visual impact of this problem. Figure 1 As shown, when the bumper is positioned relative to the rear of the vehicle in the X-axis direction, it appears "too long," causing a bulge at the contact point with the lights. Conversely, when positioned towards the front, the bumper appears "too short," resulting in excessive clearance with the fender. This inconsistent assembly directly impacts the overall visual and perceived quality of the vehicle. The core issue lies in the inability of traditional positioning methods to effectively control the cumulative errors of multiple component levels, making it difficult to maintain a stable matching relationship between the bumper and surrounding components. Even minute deviations in each link of the dimensional chain are ultimately magnified and manifested at the bumper's assembly position.

[0004] Accumulated tolerances directly hinder the improvement of the overall vehicle's aesthetic appeal. Uneven gaps and excessive surface differences not only affect visual appearance but can also lead to functional problems such as increased wind noise and accelerated component wear. In the increasingly competitive new energy vehicle market, insufficient assembly precision has become a key bottleneck restricting product quality improvement. There is an urgent need for a novel assembly solution that breaks the traditional dimensional chain to fundamentally solve the problem of accumulated tolerances. An ideal technical solution should be able to directly control the key positioning points of the bumper relative to the vehicle body structure, avoiding the error transmission from multiple intermediate components, thereby achieving precise matching between the bumper and surrounding components such as lights and fenders. This technological improvement requires not only innovative positioning strategies but also corresponding tooling design and assembly process support to ensure that the assembly precision required by the design can be consistently achieved in the production environment, ultimately improving the overall vehicle's quality and market competitiveness. Utility Model Content

[0005] Based on the above description, this utility model provides a bumper assembly fixture. By designing a dedicated assembly fixture system, it directly ensures the positional accuracy of the bumper relative to the vehicle body (especially the fender), avoiding the error transmission involved in intermediate components such as the fender, fender reinforcement plate, shock absorber tower sheet metal, longitudinal beam, and front bumper center bracket in traditional methods.

[0006] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: A bumper assembly fixture, comprising a fixture body, and a first positioning mechanism, a magnetic fixing mechanism, and a pair of second positioning mechanisms fixedly installed on the fixture body, wherein: The first positioning mechanism is located in the middle section of the tooling body and is configured to be adapted to the bumper assembly; A pair of second positioning mechanisms are symmetrically arranged at both ends of the tooling body and are configured to fit the side fenders of the vehicle body; The magnetic fixing mechanism is arranged adjacent to the second positioning mechanism and is used to fix the fender to the tooling body.

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

[0008] Preferably, the first positioning mechanism includes a first main positioning pin and a first auxiliary positioning pin, the first main positioning pin and the first auxiliary positioning pin being adapted to a plurality of positioning holes on the bumper assembly, and the positioning depth of the first main positioning pin being greater than the positioning depth of the first auxiliary positioning pin.

[0009] Preferably, the first positioning mechanism includes a first main positioning pin and a plurality of first auxiliary positioning pins, wherein the first main positioning pin is located in the center of the plurality of first auxiliary positioning pins.

[0010] Preferably, the second positioning mechanism includes a second main positioning pin and a second auxiliary positioning pin, which are adapted to the multiple positioning holes on the fender.

[0011] Preferably, the magnetic fixing mechanism is disposed between the second main positioning pin and the second auxiliary positioning pin.

[0012] Preferably, the magnetic fixing mechanism includes a silicon steel column and a coil. One end of the silicon steel column is fixedly installed on the tooling body, and the other end is suspended. The coil is sleeved on the circumferential surface of the silicon steel column in the same winding direction, and the coil and the silicon steel column are insulated from each other. When the coil is energized, the suspended end of the silicon steel column generates an axial magnetic attraction force.

[0013] Preferably, the suspended end of the silicon steel column is provided with an adsorption plane, which is configured to fit the surface of the fender.

[0014] Preferably, the circumferential surface of the silicon steel column is provided with an annular groove, and the coil is arranged in the annular groove.

[0015] Preferably, the tooling body has a cavity for accommodating the wire system, the wire system is insulated from the tooling body, and the coil passes through the cavity and is electrically connected to the wire system.

[0016] Preferably, the tooling body is provided with a magnetic switch, and the magnetic switch is electrically connected to the coil through a wire system.

[0017] Compared with the prior art, the technical solution of this application has the following beneficial technical effects: This utility model provides a bumper assembly fixture that integrates a first positioning mechanism located in the middle section, symmetrical second positioning mechanisms at both ends, and a magnetic fixing mechanism into the main body of the fixture. This creates a collaborative positioning system that effectively breaks the lengthy dimensional chain in traditional assembly, directly establishing a precise coordinate relationship between the bumper and the vehicle fender. This fundamentally eliminates assembly errors caused by the cumulative tolerances of multiple intermediate components. The symmetrical layout of the positioning mechanism ensures the stability and balance of the fixture clamping, while the collaborative design of the positioning and fixing functions significantly improves operational convenience and assembly speed. It can significantly improve the assembly accuracy and consistency of gaps and surface differences between the bumper, lights, and fenders without relying on the experience of skilled workers, ensuring the overall refinement and quality stability of the vehicle's appearance. Attached Figure Description

[0018] Figure 1 A diagram showing the assembly position relationship between the car bumper and headlights; Figure 2 A schematic diagram showing the installation location of lamps in automotive structural components; Figure 3 A schematic diagram of the bumper assembly tooling structure provided in this embodiment of the utility model; Figure 4 A cross-sectional view of the magnetic fixing mechanism provided in an embodiment of this utility model; Figure 5 A schematic diagram of the bumper assembly fixture and fender assembly provided in this embodiment of the utility model; Figure 6 A schematic diagram of the bumper assembly tooling and the front bumper center bracket provided in this embodiment of the utility model; Figure 7 A schematic diagram showing the structural fit between the bumper assembly tooling and the car bumper assembly after assembly, as provided in this embodiment of the utility model. Figure 8 A schematic diagram of the assembly process of the bumper assembly tooling and the automotive bumper components provided in this embodiment of the utility model.

[0019] The attached diagram lists the components represented by each number as follows: 1. Tooling body, 1a. Cavity, 2. First positioning mechanism, 201. First main positioning pin, 202. First auxiliary positioning pin, 3. Magnetic fixing mechanism, 301. Silicon steel column, 301a. Annular groove, 301b. Adsorption plane, 302. Coil, 4. Second positioning mechanism, 401. Second main positioning pin, 402. Second auxiliary positioning pin, 5. Magnetic switch, 6. Wiring system, 7. Fender, 8. Fender reinforcement plate, 9. Shock absorber tower sheet metal, 10. Longitudinal beam, 11. Front bumper center bracket, 12. Bumper, 13. Light. Detailed Implementation

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

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

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

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

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

[0025] like Figure 2 The diagram shows the installation location of lamp 13 in the automotive structural components. Figure 3 This is a schematic diagram of the bumper assembly tooling structure provided in an embodiment of the present utility model. Figure 4 Showing Figure 3 A cross-sectional view of the structure of the magnetic fixing mechanism 3 installed on the tooling. Figure 5 Showing Figure 3 A schematic diagram of the tooling and its assembly with the fender 7. Figure 6 Showing Figure 3 A schematic diagram of the tooling and its assembly with the front bumper bracket 11. Figure 7 This shows Figure 3 work clothes and Figure 2 The diagram shows the assembly of automotive structural components.

[0026] Combination Figure 3 and Figure 7As shown, this embodiment provides a bumper assembly fixture, including a fixture body 1, a first positioning mechanism 2, a magnetic fixing mechanism 3, and a pair of second positioning mechanisms 4 fixedly installed on the fixture body 1, wherein: The first positioning mechanism 2 is located in the middle section of the tooling body 1 and is configured to be adapted to the bumper assembly; the bumper assembly here includes the bumper 12 and the front bumper center bracket 11 for supporting the bumper 12; A pair of second positioning mechanisms 4 are symmetrically arranged at both ends of the tooling body 1 and are configured to be adapted to the fenders 7 on both sides of the vehicle body, so as to realize the synchronous positioning of the fenders 7 on both sides. The magnetic fixing mechanism 3 is arranged adjacent to the second positioning mechanism 4 and is used to fix the fender 7 to the tooling body 1.

[0027] Understandably, based on the deficiencies pointed out in the background technology, this embodiment provides a bumper assembly fixture. By integrating a first positioning mechanism 2 located in the middle section, a second positioning mechanism 4 symmetrically positioned at both ends, and a magnetic fixing mechanism 3 on the main body 1 of the fixture, a collaborative positioning system is constructed. This effectively breaks the lengthy dimensional chain in traditional assembly and directly establishes a precise coordinate relationship between the bumper 12 and the fender 7, thereby fundamentally eliminating assembly errors caused by the cumulative tolerances of multiple intermediate parts. The symmetrical layout of the positioning mechanism ensures the stability and balance of the fixture clamping, while the collaborative design of positioning and fixing functions greatly improves the ease of operation and assembly cycle. It can significantly improve the assembly accuracy and consistency of the gaps and surface differences between the bumper 12, the lights 13, and the fender 7 without relying on the experience of skilled workers, ensuring the exquisite appearance and quality stability of the entire vehicle.

[0028] In one possible embodiment, such as Figure 3 as well as Figure 6 As shown, the first positioning mechanism 2 includes a first main positioning pin 201 and a first auxiliary positioning pin 202. The first main positioning pin 201 and the first auxiliary positioning pin 202 are adapted to a plurality of positioning holes on the bumper assembly (such as the front bumper center bracket 11 in this embodiment), and the positioning depth of the first main positioning pin 201 is greater than the positioning depth of the first auxiliary positioning pin 202.

[0029] Understandably, the first positioning mechanism 2 constructs a hierarchical and phased precise positioning method by setting a first main positioning pin 201 and a first auxiliary positioning pin 202, and ensuring that they are matched one-to-one with multiple positioning holes on the bumper assembly. The first main positioning pin 201 undertakes the main positioning function and load transmission, and its large positioning depth ensures the stability and guidance of the initial positioning; while the first auxiliary positioning pin 202 plays an auxiliary positioning and error prevention role, and the two work together to form redundant positioning. Through the coordinated action of multiple positioning points, the six degrees of freedom of the bumper assembly during the assembly process are effectively restricted, avoiding assembly deviations caused by the failure of a single positioning point.

[0030] Furthermore, the first positioning mechanism 2 includes a first main positioning pin 201 and multiple first auxiliary positioning pins 202, with the first main positioning pin 201 located at the center of the multiple first auxiliary positioning pins 202. By setting the first main positioning pin 201 at the center of the multiple first auxiliary positioning pins 202, a centrally symmetrical positioning strategy for the front support bracket 11 can be achieved, constructing a radial positioning method based on the first main positioning pin 201: the main positioning pin serves as the core reference point, undertaking the main positioning function and load transfer, ensuring the initial alignment and stability of the front support bracket 11; while the multiple first auxiliary positioning pins 202 are symmetrically distributed around it, forming redundant constraints, jointly restricting the rotational and translational degrees of freedom of the front support bracket 11 during assembly. This embodiment utilizes the geometric center principle to ensure uniform distribution of positioning force, avoiding tilting or stress concentration caused by off-center loading. At the same time, through the hierarchical cooperation of the main and auxiliary positioning pins, the synergistic effect of guidance, error prevention, and precise positioning is achieved, thereby improving repeatability and reliability in complex assembly environments.

[0031] In one possible embodiment, such as Figure 3 as well as Figure 5 As shown, the second positioning mechanism 4 includes a second main positioning pin 401 and a second auxiliary positioning pin 402, which are adapted to the multiple positioning holes on the fender 7. When installing the tooling, the fender 7 is first roughly positioned by the second main positioning pin 401, and after adjusting the position, it is then finely positioned by the second auxiliary positioning pin 402.

[0032] It is understandable that this embodiment achieves precise positioning of the fender 7 through a hierarchical cooperation mechanism of main and auxiliary locating pins. In this scheme, the second main locating pin 401 undertakes the core positioning function, and its larger size and depth are preferentially inserted into the locating hole of the fender 7 to establish an initial reference; the second auxiliary locating pin 402 serves as an auxiliary positioning unit, forming a redundant constraint system by correspondingly adapting to multiple locating holes on the fender 7. In this embodiment, after the second main locating pin 401 determines the basic position of the fender 7, the second auxiliary locating pin 402 further eliminates the remaining degrees of freedom, and in particular, effectively limits the rotational and translational deviations that may occur in the fender 7 during assembly.

[0033] In one possible embodiment, such as Figure 3 as well as Figure 5 As shown, the magnetic fixing mechanism 3 is disposed between the second main positioning pin 401 and the second auxiliary positioning pin 402. After the second main positioning pin 401 and the second auxiliary positioning pin 402 have completed positioning, the magnetic fixing mechanism 3 effectively locks the fixture to the fender 7, preventing the position and angle from shifting after positioning and increasing the stability of the fixture installation.

[0034] In one possible embodiment, such as Figure 4 As shown, the magnetic fixing mechanism 3 employs a magnetic attraction mechanism, which includes a silicon steel column 301 and a coil 302. One end of the silicon steel column 301 can be fixedly installed on the tooling body 1 via screws or a flange structure, while the other end of the silicon steel column 301 serves as an adsorption end, suspended for adsorbing the surface of the fender 7. The coil 302 is wound in the same direction (e.g., clockwise or counterclockwise) around the circumferential surface of the silicon steel column 301, and the coil 302 is insulated from the silicon steel column 301. Based on the principle of electromagnetic induction, when an excitation current is applied to the coil 302, an induced magnetic field is generated around the silicon steel column 301, and the suspended end of the silicon steel column 301 generates an axial magnetic attraction force.

[0035] In this embodiment, after the fender 7 is positioned by the second positioning mechanism 4, the coil 302 is energized. The coil 302 and the silicon steel column 301 form an electromagnet, thereby firmly adsorbing and fixing the fender 7 to the tooling, improving the reliability of the tooling installation.

[0036] In one possible embodiment, such as Figure 4As shown, to achieve a stronger magnetic attraction effect, the suspended end of the silicon steel column 301 is provided with an adsorption plane 301b, which is configured to fit the surface of the fender 7. For example, the adsorption plane 301b can be set as a circular plane or a square plane. This embodiment utilizes the pressure equalization effect of planar contact to achieve efficient conduction and distribution of electromagnetic attraction force. Specifically, when the coil 302 is energized, the magnetic field lines generated by the silicon steel column 301 form a complete magnetic circuit with the surface of the fender 7 through the adsorption plane 301b. The flat contact surface significantly increases the effective adsorption area, making the magnetic attraction force evenly distributed on the surface of the fender 7, avoiding the local stress concentration problem that may occur with point contact or line contact.

[0037] In one possible embodiment, such as Figure 4 As shown, the circumferential surface of the silicon steel column 301 is provided with an annular groove 301a, and the coil 302 is arranged in the annular groove 301a. This embodiment is based on a dual mechanism of mechanical fixation and electromagnetic optimization. The annular groove 301a structure utilizes the embedded fixing principle. Through the geometric constraints of the precisely machined groove, it provides a precise positioning reference and a stable accommodating space for the coil 302, enabling the coil 302 to fit tightly against the surface of the silicon steel column 301 and maintain a uniform turn spacing. The radial constraint of the groove wall prevents the coil 302 from shifting or loosening under assembly or vibration conditions, while ensuring that the coil 302 and the silicon steel column 301 maintain the optimal electromagnetic coupling distance.

[0038] In one possible embodiment, such as Figure 4 As shown, to achieve integrated wiring safety, the fixture body 1 adopts a hollow structure with a cavity 1a inside. The cavity 1a is used to accommodate the wire system 6, and the wire system 6 is insulated from the fixture body 1. The coil 302 passes through the cavity 1a and is electrically connected to the wire system 6.

[0039] In this embodiment, the cavity 1a structure physically isolates the energized wires from the tooling body 1 (which may be made of a metallic conductive material), avoiding the risk of short circuits caused by wire wear. The insulation design forms a current barrier through material interface barriers, ensuring the power supply safety of the electromagnetic adsorption mechanism. By integrating the wiring within the cavity 1a, the power and control lines are completely hidden inside the tooling body, avoiding potential safety hazards such as tripping or pulling caused by exposed wiring. This meets the stringent 5S management requirements of automotive manufacturing workshops, simplifies the tooling structure, and improves safety.

[0040] Furthermore, to facilitate the operation of the magnetic attraction mechanism, such as... Figure 3 As shown, the tooling body 1 is equipped with a magnetic switch 5, which is electrically connected to the coil 302 through a wire system 6.

[0041] Understandably, the magnetic switch 5 serves as a human-machine interface, forming a complete circuit with the electromagnetic coil 302 through the wire system 6. The operator can quickly switch the magnetic mechanism on and off with a single touch, improving operational convenience and efficiency.

[0042] like Figure 8 This is a schematic diagram illustrating the assembly process of a bumper assembly fixture and automotive bumper components, provided for one embodiment. Figure 8 As shown, the steps for assembling car bumper components using this bumper assembly fixture are as follows: 1. Align the first main positioning pin 201 on the assembly tool with the main positioning hole of the left fender 7, and align the first auxiliary positioning pin 202 on the same side with the auxiliary positioning hole of the left fender 7. 2. Align the first main positioning pin 201 on the assembly tool with the main positioning hole of the right fender 7, and align the first auxiliary positioning pin 202 on the same side with the auxiliary positioning hole of the right fender 7. 3. Lower the assembly fixture along the axial direction of the positioning hole of the fender 7, so that the main and auxiliary positioning pins of the second positioning mechanism 4 on the left and right sides are inserted into the corresponding main and auxiliary positioning holes on the fender 7. 4. Close the magnetic switch 5 to energize the magnetic mechanism and firmly attach it to the surface of the fender 7; 5. Align the main positioning hole of the front center bracket 11 with the first main positioning pin 201 of the first positioning mechanism 2 on the assembly tooling, and insert a portion for rough positioning; 6. Rotate the front center support bracket 11 horizontally to align its auxiliary positioning hole with the first auxiliary positioning pin 202 of the first positioning mechanism 2 on the assembly tooling, and insert it completely; 7. Pre-tighten the multiple fastening screws on the longitudinal beam 10 of the front support bracket 11, and tighten all the pre-tightened fastening screws; 8. Disconnect the magnetic switch 5 to de-energize the magnetic mechanism and release it from the surface of the fender 7; 9. Remove the assembly fixtures and assemble the lighting fixtures (13). 10. Align the main and auxiliary positioning holes of the front bumper 12 with the main and auxiliary positioning holes on the front bumper center bracket 11, and pre-tighten the multiple fastening bolts; 11. Align the bumper 12 with the slot on the fender 7 area and forcefully push the bumper 12 into the slot; 12. Tighten the 12 bolts around the bumper to complete the assembly.

[0043] This utility model provides a bumper assembly fixture that employs a triple positioning and collaborative mechanism: The second positioning mechanism 4, symmetrically arranged at both ends of the fixture body 1, precisely aligns with the fender 7, establishing a stable reference coordinate system; the first positioning mechanism 2 in the middle section achieves progressive and precise positioning of the bumper components through graded cooperation of main and auxiliary positioning pins; and the unique electromagnetic adsorption mechanism achieves one-click rapid fixation through the design of the annular groove 301a, coil 302, and dedicated adsorption plane 301b on the silicon steel column 301. The combined effect of this triple positioning mechanism successfully breaks the long dimensional chain in traditional assembly, reducing the cumulative tolerance from ±3mm to a much lower range, significantly improving assembly accuracy. Simultaneously, the integrated wiring design and magnetic switch 5 control ensure operational safety, and the symmetrical positioning layout of the two fenders 7 optimizes the assembly process, significantly reducing the time required for a single operation. This bumper assembly fixture not only solves the precision problem of matching the bumper 12 and light 13 in new energy vehicles but also significantly improves production efficiency and product quality consistency through modular design, providing a reliable precision assembly solution for the automotive manufacturing industry.

[0044] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A bumper assembly tooling, characterized in that, It includes a tooling body (1), a first positioning mechanism (2), a magnetic fixing mechanism (3), and a pair of second positioning mechanisms (4) fixedly installed on the tooling body (1), wherein: The first positioning mechanism (2) is located in the middle section of the tooling body (1) and is configured to be adapted to the bumper (12) assembly; A pair of second positioning mechanisms (4) are symmetrically arranged at both ends of the tooling body (1) and are configured to be adapted to the fenders (7) on both sides of the vehicle body; The magnetic fixing mechanism (3) is arranged adjacent to the second positioning mechanism (4) and is used to fix the fender (7) to the tooling body (1).

2. The bumper assembly fixture according to claim 1, characterized in that, The first positioning mechanism (2) includes a first main positioning pin (201) and a first auxiliary positioning pin (202). The first main positioning pin (201) and the first auxiliary positioning pin (202) are adapted to a plurality of positioning holes on the bumper (12) assembly, and the positioning depth of the first main positioning pin (201) is greater than the positioning depth of the first auxiliary positioning pin (202).

3. The bumper assembly fixture according to claim 2, characterized in that, The first positioning mechanism (2) includes a first main positioning pin (201) and a plurality of first auxiliary positioning pins (202), wherein the first main positioning pin (201) is located in the center of the plurality of first auxiliary positioning pins (202).

4. The bumper assembly tool of claim 1, wherein, The second positioning mechanism (4) includes a second main positioning pin (401) and a second auxiliary positioning pin (402), which are adapted to the multiple positioning holes on the fender (7).

5. A bumper assembly tool as defined in claim 4, wherein, The magnetic fixing mechanism (3) is located between the second main positioning pin (401) and the second auxiliary positioning pin (402).

6. The bumper assembly fixture according to claim 1, characterized in that, The magnetic fixing mechanism (3) includes a silicon steel column (301) and a coil (302). One end of the silicon steel column (301) is fixedly installed on the tooling body (1), and the other end is suspended. The coil (302) is sleeved on the circumferential surface of the silicon steel column (301) in the same winding direction, and the coil (302) and the silicon steel column (301) are insulated from each other. When the coil (302) is energized, the suspended end of the silicon steel column (301) generates a magnetic attraction force.

7. A bumper assembly fixture according to claim 6, characterized in that, The suspended end of the silicon steel column (301) is provided with an adsorption plane (301b), which is configured to fit the surface of the fender (7).

8. A bumper assembly tool as defined in claim 6 wherein, The silicon steel column (301) has an annular groove (301a) on its circumferential surface, and the coil (302) is arranged in the annular groove (301a).

9. A bumper assembly fixture according to any one of claims 6 to 8, characterized in that, The tooling body (1) has a cavity (1a) for accommodating the wire system (6). The wire system (6) is insulated from the tooling body (1). The coil (302) passes through the cavity (1a) and is electrically connected to the wire system (6).

10. A bumper assembly fixture according to claim 9, characterized in that, The tooling body (1) is provided with a magnetic switch (5), which is electrically connected to the coil (302) through a wire system (6).

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