Vehicle body structure mounting method

Abstract

The invention relates to the technical field of automobiles, and particularly discloses a vehicle body structure mounting method, and a vehicle body structure comprises a factory-entering lower vehicle body assembly, a side wall assembly, a top cover cross beam assembly and a side wall outer plate assembly; the vehicle body structure mounting method comprises the following steps that the lower vehicle body assembly is positioned and fixed; the side wall assemblies are connected to the two sides of the lower vehicle body assembly through low-temperature curing glue, and a first vehicle body frame is formed through baking and preliminary curing; the top cover beam assembly is connected to the upper edge of the side wall assembly through low-temperature curing glue, and a second vehicle body frame is formed through baking and curing; the plastic side wall outer plate assemblies are installed on the two sides of the second vehicle body frame and connected through low-temperature curing glue, and a third vehicle body frame is formed after baking and curing; and the third vehicle body frame is reinforced through bolts. By means of factory-entering high integration, the production chain can be shortened, the production efficiency can be improved, the whole vehicle assembly and performance requirements are met by adopting the low-temperature curing glue and bolt assembly mode, and the investment cost is saved.

Description

Technical Field

[0001] The present invention relates to the field of automobile technology, and in particular to a vehicle body structure installation method. Background Art

[0002] Currently, the traditional automotive industry typically assembles complete vehicles using four major processes: stamping, welding, painting, and final assembly. This means that multiple body parts must undergo processing in the stamping, welding, painting, and final assembly shops before the vehicle is assembled. This results in numerous inbound assemblies, lengthy vehicle manufacturing processes, complex connection processes, and high manufacturing investment. Summary of the Invention

[0003] The technical problem to be solved by the present invention is: how to improve the production efficiency of the whole vehicle and reduce the investment cost.

[0004] In order to solve the above technical problems, the present invention provides a method for installing a vehicle body structure, wherein the vehicle body structure includes a factory-level lower body assembly, a side panel assembly, a roof crossbeam assembly, and a side panel outer panel assembly;

[0005] The vehicle body structure installation method comprises the following steps:

[0006] Positioning and fixing the lower vehicle body assembly;

[0007] Connecting the side panel assembly to both sides of the lower body assembly using low-temperature curing adhesive, and baking and preliminarily curing the adhesive to form a first body frame;

[0008] Connecting the roof crossbeam assembly to the upper edge of the side panel assembly using low-temperature curing adhesive, and baking and curing the adhesive to form a second vehicle body frame;

[0009] Installing the plastic side outer panel assembly on both sides of the second body frame, connecting them with low-temperature curing adhesive, and baking and curing them to form a third body frame;

[0010] The third vehicle body frame is reinforced with bolts.

[0011] Further preferably, the lower body assembly includes a front cabin assembly and a rear floor assembly; and the step of positioning and fixing the lower body assembly includes:

[0012] Obtaining center references of the front cabin assembly and the rear floor assembly, and determining whether a distance between the two center references meets positioning requirements;

[0013] Measure the levelness of the front cabin assembly and the rear floor assembly, and fix them after meeting the positioning requirements.

[0014] Further preferably, the side panel assembly includes a left side panel assembly and a right side panel assembly, and the step of connecting the side panel assemblies to both sides of the lower body assembly using a low-temperature curing adhesive and baking and preliminarily curing them to form a first body frame includes:

[0015] Arranging the left side panel assembly and the right side panel assembly on opposite sides of the lower body assembly, applying low-temperature curing adhesive on both ends of the left side panel assembly and the right side panel assembly, and then connecting them with the lower body assembly to form a first body frame;

[0016] The location where the low-temperature curing adhesive is applied is baked to cure the low-temperature curing adhesive.

[0017] Further preferably, the roof crossbeam assembly includes a roof front crossbeam assembly, a roof middle crossbeam assembly, and a roof rear crossbeam assembly; and the step of connecting the roof crossbeam assembly to the upper edge of the side panel assembly using a low-temperature curing adhesive and baking and curing the adhesive to form the second vehicle body frame includes:

[0018] Connect the roof front crossbeam assembly, the roof middle crossbeam assembly, and the roof rear crossbeam assembly between the upper edge of the left side panel assembly and the upper edge of the right side panel assembly, respectively, and apply low-temperature curing glue at the connection points;

[0019] The position where the low-temperature curing adhesive is applied is baked to cure the low-temperature curing adhesive to form a second vehicle body frame.

[0020] Further preferably, the side panel outer panel assembly includes a left plastic side panel outer panel and a right plastic side panel outer panel, the left plastic side panel outer panel is connected to the left side panel assembly by means of low-temperature curing glue, and the right plastic side panel outer panel is connected to the right side panel assembly by means of low-temperature curing glue.

[0021] Further preferably, the step of reinforcing the third vehicle body frame with bolts includes:

[0022] Bolts are installed between the lower body assembly and the side panel assembly, between the roof cross member assembly and the side panel assembly, and between the plastic side panel outer panel assembly and the second vehicle body frame.

[0023] Further preferably, the low-temperature curing adhesive is an epoxy resin low-temperature curing adhesive.

[0024] Further preferably, the curing temperature of the low-temperature curing adhesive is 60-180°C.

[0025] Further preferably, the curing time of the low-temperature curing adhesive is 2-15 minutes.

[0026] Further preferably, the baking device is an electromagnetic induction heating device.

[0027] Compared with the prior art, the vehicle body structure installation method provided by the present invention has the following advantages:

[0028] The present invention integrates the factory-level assembly into the lower body assembly, side panel assembly, roof crossbeam assembly and side panel outer panel assembly. The high degree of integration at the factory level can shorten the production chain and improve production efficiency. The lower body assembly, side panel assembly, roof crossbeam assembly and side panel outer panel assembly are first connected in the final assembly workshop by low-temperature curing structural adhesive, and the low-temperature curing adhesive is heated and cured to connect body sub-assemblies of different materials to form a complete body structure. In addition, the body structure is strengthened by subsequent bolts to further meet the performance requirements of the whole vehicle. This method can eliminate traditional welding and painting shops, greatly simplify the assembly process of the whole vehicle, and save investment costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is an exploded view of the first vehicle body frame of the present invention.

[0030] Figure 2 It is an assembly drawing of the first vehicle body frame of the present invention.

[0031] Figure 3 It is a layout diagram of the first vehicle body frame and the roof crossbeam assembly of the present invention.

[0032] Figure 4 It is an assembly drawing of the second vehicle body frame of the present invention.

[0033] Figure 5 It is a layout diagram of the second vehicle body frame and the side outer panel assembly of the present invention.

[0034] Figure 6 It is a structural schematic diagram of the third vehicle body frame of the present invention.

[0035] Figure 7 This invention Figure 6 Cross-sectional view of section AA.

[0036] Figure 8 This invention Figure 6 Cross-sectional view of section BB.

[0037] Figure 9 This invention Figure 6 Cross-sectional view of section CC.

[0038] Figure 10 This is a layout diagram of the baking device for the vehicle body structure of the present invention after connection with low-temperature curing glue.

[0039] In the figure: 11, front compartment assembly; 12, rear floor assembly; 21, left side panel assembly; 22, right side panel assembly; 31, roof front crossbeam assembly; 32, roof middle crossbeam assembly; 33, roof rear crossbeam assembly; 41, left plastic side panel outer panel; 42, right plastic side panel outer panel; 51, low-temperature curing adhesive; 61, baking device; 100, first vehicle body frame; 200, second vehicle body frame; 300, third vehicle body frame. DETAILED DESCRIPTION

[0040] The following embodiments of the present invention are described in further detail with reference to the accompanying drawings and examples. The following examples are used to illustrate the present invention but are not intended to limit the scope of the present invention.

[0041] In the description of the present invention, it should be understood that the terms "up", "down", "left", "right", "inside", "outside", "between", "end", "both sides", "relative", "horizontal", etc. used in the present invention to indicate the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0042] The terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Furthermore, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be interpreted broadly, meaning, for example, fixed, removable, or integral; mechanical or electrical; direct or indirect through an intermediary; and internal communication between two components. Those skilled in the art will understand the specific meanings of these terms in the present invention based on the specific circumstances.

[0043] This embodiment provides a vehicle body structure installation method, which is implemented based on the vehicle body structure. Figure 3-5 As shown, the vehicle body structure includes a factory-level lower body assembly, side panel assembly, roof crossbeam assembly and side panel outer panel assembly; wherein the lower body assembly includes a front compartment assembly 11 and a rear floor assembly 12, the side panel assembly includes a left side panel assembly 21 and a right side panel assembly 22, the roof crossbeam assembly includes a front roof crossbeam assembly 31, a middle roof crossbeam assembly 32 and a rear roof crossbeam assembly 33, and the side panel outer panel assembly includes a left plastic side panel outer panel 41 and a right plastic side panel outer panel 42.

[0044] The above-mentioned "factory level" means that the front cabin assembly 11, the rear floor assembly 12, the left side panel assembly 21, the right side panel assembly 22, the top cover front cross beam assembly 31, the top cover middle cross beam assembly 32, the top cover rear cross beam assembly 33, the left plastic side panel outer panel 41 and the right plastic side panel outer panel 42 have been assembled into an independent assembly before entering the factory, and no longer need to go through traditional welding and painting workshops, which greatly simplifies the assembly process of the vehicle and saves investment costs.

[0045] In some embodiments, the lower body assembly also includes a front floor assembly, which is typically integrated onto the battery pack using CTB (Cell to Body) technology. CTB technology refers to battery-body integration technology, which integrates the battery pack cover with the traditional front floor assembly to form a sandwich structure of the battery pack cover, blade battery, and tray. The integration of the battery and the body can maximize the utilization of the space inside the vehicle.

[0046] The front cabin assembly 11, the rear floor assembly 12, the left side panel assembly 21, the right side panel assembly 22, the top cover front crossbeam assembly 31, the top cover middle crossbeam assembly 32, the top cover rear crossbeam assembly 33, the left plastic side panel outer panel 41 and the right plastic side panel outer panel 42 are connected in the final assembly workshop to form a complete body structure.

[0047] The vehicle body structure installation method of this embodiment is intended to connect the front cabin assembly 11, the rear floor assembly 12, the left side panel assembly 21, the right side panel assembly 22, the top cover front cross beam assembly 31, the top cover middle cross beam assembly 32, the top cover rear cross beam assembly 33, the left plastic side panel outer panel 41 and the right plastic side panel outer panel 42 in the final assembly workshop to form a complete vehicle body structure.

[0048] The vehicle body structure installation method provided in this embodiment includes the following steps:

[0049] Step 1: Position and fix the lower body assembly;

[0050] Step 2: Connect the side panel assembly to both sides of the lower body assembly using low-temperature curing adhesive 51, and bake and preliminarily cure to form the first body frame 100;

[0051] Step 3: Connect the roof cross member assembly to the upper edge of the side panel assembly using low-temperature curing adhesive 51, and bake and cure to form the second vehicle body frame 200;

[0052] Step 4: Install the plastic side outer panel assembly on both sides of the second body frame and connect them with low-temperature curing glue 51, and bake and cure them to form the third body frame 300;

[0053] Step 5: Bolt reinforcement to the third body frame.

[0054] This embodiment integrates the factory-level assembly into the lower body assembly, side panel assembly, roof crossbeam assembly and side panel outer panel assembly. The high degree of integration at the factory level can shorten the production chain and improve production efficiency. The lower body assembly, side panel assembly, roof crossbeam assembly and side panel outer panel assembly are first connected in the final assembly workshop by low-temperature curing structural adhesive, and the low-temperature curing adhesive is heated and cured to connect body sub-assemblies of different materials to form a complete body structure. In addition, the body structure is strengthened by subsequent bolts to further meet the performance requirements of the vehicle. This method can eliminate traditional welding and painting shops, greatly simplify the assembly process of the vehicle, and save investment costs.

[0055] In the above step one, in order to improve the assembly accuracy of the whole vehicle, the lower body assembly is first positioned and fixed before assembly, that is, the front cabin assembly and the rear floor assembly are positioned and calibrated; specifically, in step one, it is necessary to first obtain the center reference of the front cabin assembly and the rear floor assembly, and determine whether the distance between the two center references meets the positioning requirements. Secondly, the horizontality of the front cabin assembly and the rear floor assembly is measured, and fixed after meeting the positioning requirements, so as to meet the subsequent left side panel assembly 21, right side panel assembly 22, top cover front cross beam assembly 31, top cover middle cross beam assembly 32, top cover rear cross beam assembly 33, left plastic side panel outer panel 41 and right plastic side panel outer panel 42 assembly requirements, thereby improving assembly accuracy.

[0056] In the above step 2, if Figure 1 As shown, the left side and right side assemblies are first arranged on opposite sides of the lower body assembly, and low-temperature curing adhesive 51 is applied to both ends of the left side and right side assemblies 21 and 22, and then connected to the lower body assembly to form a first body frame 100. Figure 2 As shown, the position where the low temperature curing glue is applied is then baked to cure the low temperature curing glue 51. Specifically, the front end of the left side panel assembly 21 is connected to the front compartment assembly 11 through the low temperature curing glue 51, as shown. Figure 7 As shown in the cross-sectional view, the rear end of the left side panel assembly 21 is connected to the rear floor assembly 12 by a low-temperature curing adhesive 51, as shown in FIG. Figure 8 Similarly, the front end of the right side assembly 22 is connected to the front compartment assembly 11 by a low-temperature curing adhesive 51, and the rear end of the right side assembly 22 is connected to the rear floor assembly 12 by a low-temperature curing adhesive 51, thereby forming Figure 2 A first vehicle body frame 100 is shown.

[0057] It should be noted that the above-mentioned "front end" and "rear end" are relative to the vehicle body structure, that is, the position where the front cabin assembly 11 is located is the "front end", and the position where the rear floor assembly 12 is located is the "rear end".

[0058] like Figure 3As shown, in the above step three, before the installation of the roof crossbeam assembly, the left side panel assembly and the right side panel assembly are connected and then need to be baked using a baking device to cure the low-temperature curing glue 51 to ensure the structural strength of the first vehicle body frame 100 and the installation accuracy of the roof crossbeam assembly; specifically, the roof front crossbeam assembly 31, the roof middle crossbeam assembly 32 and the roof rear crossbeam assembly 33 are first connected between the upper edges of the left side panel assembly 21 and the upper edges of the right side panel assembly 22, and low-temperature curing glue is applied at the connection points; then, the position where the low-temperature curing glue is applied is baked to cure the low-temperature curing glue to form the second vehicle body frame 200, as shown in FIG. Figure 4 shown.

[0059] Similarly, the roof front cross beam assembly 31, the roof middle cross beam assembly 32 and the roof rear cross beam assembly 33 also need to be baked after being connected to solidify the low temperature curing adhesive 51, so as to ensure the structural strength of the second vehicle body frame 200 and the installation accuracy of the plastic side panel assembly. Among them, the roof front cross beam assembly 31 and the left side panel assembly 21 are connected by low temperature curing adhesive. Figure 9 As shown in the cross-sectional view.

[0060] In the above step 4, if Figure 5 As shown, the left plastic side panel is connected to the left side panel assembly by means of low temperature curing adhesive, and the right plastic side panel is connected to the right side panel assembly by means of low temperature curing adhesive, and then baked and cured to form the third body frame 300, as shown. Figure 6 shown.

[0061] After the baking device 61 completes curing, in order to meet the performance requirements of the entire vehicle, the body structure after curing and connection needs to be further strengthened. To this end, in the above step five, bolts should be installed between the lower body assembly and the side panel assembly, between the roof crossbeam assembly and the side panel assembly, and between the plastic side panel outer panel assembly and the second body frame to meet the performance requirements of the entire vehicle.

[0062] In some embodiments, the low-temperature curing adhesive is an epoxy resin low-temperature curing adhesive. The epoxy resin low-temperature curing adhesive can cure quickly at a lower temperature and will not damage heat-sensitive precision electronic components and parts. It has excellent adhesion to most substrates, making the selection of automobile parts materials diverse. Steel, aluminum, plastic or carbon fiber and other composite materials can be selected according to vehicle shape, market positioning, etc. without causing any impact on the production line. After the construction of the traditional welding workshop is completed, it takes a lot of time and investment to transform it to adapt to the upper body of different materials; for this reason, the use of low-temperature curing adhesive connection method can connect body sub-assemblies of different materials together to form a complete body structure.

[0063] In some embodiments, the "low temperature" in the low temperature curing glue generally refers to an epoxy resin glue that is heated and cured under certain temperature conditions. Preferably, the curing temperature of the low temperature curing glue is 60-180°C, that is, it can be 60°C, 70°C, 80°C, 90°C, 100°C, 110°C, 120°C, 130°C, 140°C, 150°C, 160°C, 170°C or 180°C; depending on the curing temperature, the curing time of the low temperature curing glue is 2-15 minutes, which meets high-efficiency production.

[0064] In some embodiments, as Figure 10 As shown, the baking device 61 is an electromagnetic induction heating device. The principle of electromagnetic induction heating is that the alternating current generated by an induction heating power supply passes through an inductor (i.e., a coil) to generate an alternating magnetic field. A magnetically conductive object placed within this field cuts the alternating magnetic lines of force, thereby generating alternating currents (i.e., eddy currents) within the object. The eddy currents cause atoms within the object to move at high speeds and irregularly. The atoms collide and rub against each other, generating heat energy, which in turn heats the object. This heating method converts electrical energy into magnetic energy, causing the heated steel object to sense the magnetic energy and generate heat. Electromagnetic induction heating is highly controllable, and different heating temperatures can be selected according to different situations to meet the assembly requirements of different vehicle models.

[0065] In summary, an embodiment of the present invention provides a body structure installation method, which integrates the factory-level assembly into the lower body assembly, the side panel assembly, the roof crossbeam assembly and the side panel outer panel assembly. The high degree of integration at the factory level can shorten the production chain and improve production efficiency. The lower body assembly, the side panel assembly, the roof crossbeam assembly and the side panel outer panel assembly are first connected in the final assembly workshop by low-temperature curing structural adhesive, and the low-temperature curing adhesive is heated and cured to connect body sub-assemblies of different materials to form a complete body structure. In addition, the body structure is strengthened by subsequent bolts to further meet the performance requirements of the vehicle. This method can eliminate traditional welding and painting shops, greatly simplify the assembly process of the vehicle, and save investment costs.

[0066] The above description is only a preferred embodiment of the present invention. It should be noted that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principles of the present invention. These improvements and substitutions should also be considered as the scope of protection of the present invention. The basic principles, main features and advantages of the present invention are shown and described above. For those skilled in the art, it is obvious that the present invention is not limited to the details of the above preferred embodiments. The examples should be regarded as illustrative and non-restrictive. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, it is intended that all changes that fall within the meaning and scope of the equivalent elements of the claims are included in the present invention.

[0067] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in the embodiments can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A vehicle body structure installation method, characterized in that: The vehicle body structure includes a factory-grade lower body assembly, a side panel assembly, a roof crossbeam assembly, and a side panel outer panel assembly; The vehicle body structure installation method comprises the following steps: Positioning and fixing the lower vehicle body assembly; Connecting the side panel assembly to both sides of the lower body assembly using low-temperature curing adhesive, and baking and preliminarily curing the adhesive to form a first body frame; Connecting the roof crossbeam assembly to the upper edge of the side panel assembly using low-temperature curing adhesive, and baking and curing the adhesive to form a second vehicle body frame; Installing the plastic side outer panel assembly on both sides of the second body frame, connecting them with low-temperature curing adhesive, and baking and curing them to form a third body frame; The third vehicle body frame is reinforced with bolts.

2. The vehicle body structure installation method according to claim 1, characterized in that: The lower body assembly includes a front cabin assembly and a rear floor assembly; the steps of positioning and fixing the lower body assembly include: Obtaining center references of the front cabin assembly and the rear floor assembly, and determining whether a distance between the two center references meets positioning requirements; Measure the levelness of the front cabin assembly and the rear floor assembly, and fix them after meeting the positioning requirements.

3. The vehicle body structure installation method according to claim 2, characterized in that: The side panel assembly includes a left side panel assembly and a right side panel assembly. The steps of connecting the side panel assemblies to both sides of the lower body assembly using low-temperature curing adhesive and baking and preliminarily curing them to form a first body frame include: Arranging the left side panel assembly and the right side panel assembly on opposite sides of the lower body assembly, applying low-temperature curing adhesive on both ends of the left side panel assembly and the right side panel assembly, and then connecting them with the lower body assembly to form a first body frame; The location where the low-temperature curing adhesive is applied is baked to cure the low-temperature curing adhesive.

4. The vehicle body structure installation method according to claim 3, characterized in that: The roof crossbeam assembly includes a roof front crossbeam assembly, a roof middle crossbeam assembly, and a roof rear crossbeam assembly; the steps of connecting the roof crossbeam assembly to the upper edge of the side panel assembly using low-temperature curing adhesive and baking and curing the adhesive to form a second vehicle body frame include: Connect the roof front crossbeam assembly, the roof middle crossbeam assembly, and the roof rear crossbeam assembly between the upper edge of the left side panel assembly and the upper edge of the right side panel assembly, respectively, and apply low-temperature curing glue at the connection points; The position where the low-temperature curing adhesive is applied is baked to cure the low-temperature curing adhesive to form a second vehicle body frame.

5. The vehicle body structure installation method according to claim 3, characterized in that: The side panel outer panel assembly includes a left plastic side panel outer panel and a right plastic side panel outer panel. The left plastic side panel outer panel is connected to the left side panel assembly by means of low-temperature curing glue, and the right plastic side panel outer panel is connected to the right side panel assembly by means of low-temperature curing glue.

6. The vehicle body structure installation method according to claim 1, characterized in that: The step of reinforcing the third vehicle body frame with bolts includes: Bolts are installed between the lower body assembly and the side panel assembly, between the roof cross member assembly and the side panel assembly, and between the plastic side panel outer panel assembly and the second vehicle body frame.

7. The vehicle body structure installation method according to claim 1, characterized in that: The low temperature curing adhesive is an epoxy resin low temperature curing adhesive.

8. The vehicle body structure installation method according to claim 1, characterized in that: The curing temperature of the low-temperature curing adhesive is 60-180°C.

9. The vehicle body structure installation method according to claim 1, characterized in that: The curing time of the low-temperature curing adhesive is 2-15 minutes.

10. The vehicle body structure installation method according to claim 1, characterized in that: The baking device is an electromagnetic induction heating device.

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