A method and device for dealing with the reaction force deformation of a vehicle tailgate

Abstract

The present invention discloses a method and device for processing the reaction force deformation of a vehicle tailgate. By obtaining the tailgate assembly model, performing a force analysis on the acting force of the mounting accessories on the tailgate assembly model, and obtaining the tailgate deformation nephogram, the deformation condition of the tailgate assembly model due to the acting force can be obtained. It is possible to determine the target area for adjusting the tailgate gap and / or the tailgate position on the tailgate assembly model according to the tailgate deformation nephogram. On this basis, more accurate corresponding adjustments can be made, thereby improving the processing quality of the reaction force deformation of the vehicle tailgate. After application in production, the appearance quality of the connection position between the tailgate and the vehicle body is higher.

Description

Technical Field

[0001] The present application relates to the technical field of vehicle tailgate reaction force deformation processing, and in particular to a vehicle tailgate reaction force deformation processing method and device. Background Art

[0002] In the early design stage of the vehicle, the weight of the tailgate and the deformation caused by the related reaction force parts were not considered, resulting in the reaction force of the tailgate after the tailgate was closed due to the reaction force of the pneumatic struts and seals of the tailgate after mass production. The deformation caused by the tailgate reaction force (generally 1-2mm) is difficult to absorb by process adjustment, especially for SUVs with large tailgates, which are particularly obvious due to the large weight and reaction force. When the rigidity and strength of the tailgate are poor, simply adjusting the fixture cannot meet the process adjustment requirements and the quality requirements of the gap and surface difference.

[0003] Therefore, the reaction force deformation of the current vehicle tailgate will cause the vehicle tailgate to expose a large tailgate gap, which makes it difficult to meet the vehicle appearance quality requirements. Summary of the invention

[0004] In view of the above technical problems, a method and device for processing reaction force deformation of a vehicle tailgate of the present invention can meet the quality requirements of vehicle appearance.

[0005] The embodiment of the present invention provides the following solution:

[0006] In a first aspect, an embodiment of the present invention provides a method for processing reaction force deformation of a vehicle tailgate, comprising:

[0007] Get the tailgate assembly model;

[0008] Performing a force analysis on the tailgate assembly model according to the installation accessories to obtain a deformation cloud map of the tailgate, wherein the installation accessories at least include a tailgate pneumatic strut and a tailgate seal;

[0009] Determining a target area on the tailgate assembly model according to the tailgate deformation cloud map;

[0010] The tailgate gap and / or tailgate position of the target area are adjusted.

[0011] In an optional embodiment, the force analysis of the tailgate assembly model according to the installation accessories to obtain the tailgate deformation cloud map includes:

[0012] determining the applied torques at a plurality of analysis positions on the tailgate assembly model according to the applied forces;

[0013] For each of the analysis positions, determining the deformation of the analysis position according to the applied torque of the analysis position;

[0014] Generate the deformation nephogram of the tailgate according to the deformation amounts of the multiple analysis positions.

[0015] In an alternative embodiment, the target area is the roof area; adjusting the tailgate gap of the target area includes:

[0016] Determine the first displacement amount of the vehicle body hinge hole according to the horizontal deformation amount of the roof area, where the vehicle body hinge hole is the hinge mounting hole on the vehicle body;

[0017] Adjust the tailgate gap within a preset range according to the first displacement amount.

[0018] In an alternative embodiment, the target area is the roof area; adjusting the tailgate gap and the tailgate position of the target area includes:

[0019] Determine the first displacement amount of the vehicle body hinge hole and the second displacement amount of the tailgate hinge hole according to the horizontal deformation amount and the vertical deformation amount of the roof area, where the vehicle body hinge hole is the hinge mounting hole on the vehicle body, and the tailgate hinge hole is the hinge mounting hole on the tailgate;

[0020] Adjust both the tailgate gap and the tailgate position within a preset range according to the first displacement amount and the second displacement amount.

[0021] In an alternative embodiment, the target area is the taillight area or the bottom area; adjusting the tailgate gap and the tailgate position of the target area includes:

[0022] Determine the third offset amount of the latch mounting hole according to the deformation amount of the taillight area or the bottom area, where the latch mounting hole is the mounting hole for mounting the latch that locks the tailgate assembly model;

[0023] Adjust both the tailgate gap and the tailgate position within a preset range according to the third offset amount.

[0024] In an alternative embodiment, the determining the third offset amount of the latch mounting hole according to the deformation amount of the taillight area includes:

[0025] Obtain the first deformation amount according to the average value of the horizontal deformation amounts of the taillight areas on both sides of the tailgate assembly model;

[0026] Obtain the second deformation amount according to the average value of the vertical deformation amounts of the taillight areas on both sides of the tailgate assembly model;

[0027] Obtain the horizontal offset amount according to the horizontal target position of the tailgate assembly model and the first deformation amount;

[0028] Obtain a vertical offset according to the vertical target position of the tailgate assembly model and the second deformation amount;

[0029] Obtain the third offset according to the horizontal offset and the vertical offset.

[0030] In an alternative embodiment, the dimensional tolerance of the preset range is 1 / 6 - 1 / 8 of the standard tolerance corresponding to the tailgate gap or the tailgate position.

[0031] In an alternative embodiment, the tailgate assembly model is configured as a plastic material; after obtaining the tailgate deformation nephogram by performing a force analysis on the force applied by the installation accessories to the tailgate assembly model, it further includes:

[0032] Determine the target area according to the mapping result of the tailgate deformation nephogram to the outer surface of the tailgate assembly model;

[0033] Generate compensation data for adjusting the tailgate gap and the tailgate position according to the shape and size of the tailgate deformation nephogram in the target area.

[0034] In an alternative embodiment, after obtaining the tailgate deformation nephogram by performing a force analysis on the force applied by the installation accessories to the tailgate assembly model, it further includes:

[0035] Add a preset shielding structure to the edge of the tailgate in the target area to reduce the tailgate gap in the target area, where the formation method of the shielding structure includes at least one of bending deformation of the vehicle body or the tailgate, installing a shielding accessory on the edge of the tailgate, and extending the structure of the edge of the tailgate.

[0036] In a second aspect, an embodiment of the present invention further provides a processing device for the reaction force deformation of a vehicle tailgate, including: an acquisition module for acquiring a tailgate assembly model;

[0037] An obtaining module for performing a force analysis on the force applied by the installation accessories to the tailgate assembly model to obtain a tailgate deformation nephogram, where the installation accessories include at least a tailgate pneumatic strut and a tailgate seal;

[0038] A first determination module for determining a target area on the tailgate assembly model according to the tailgate deformation nephogram;

[0039] An adjustment module for adjusting the tailgate gap and / or the tailgate position in the target area.

[0040] Compared with the prior art, a processing method and device for the reaction force deformation of a vehicle tailgate according to the present invention have the following advantages:

[0041] By obtaining the tailgate assembly model, analyzing the force exerted on the tailgate assembly model by the mounting accessories, and obtaining the tailgate deformation nephogram, the deformation condition of the tailgate assembly model due to the force can be obtained. The target area where the tailgate gap and / or the tailgate position need to be adjusted can be determined on the tailgate assembly model according to the tailgate deformation nephogram. On this basis, more accurate corresponding adjustments can be made, thereby improving the processing quality of the vehicle tailgate reaction force deformation. After application in production, the appearance quality of the connection position between the tailgate and the vehicle body is higher. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] In order to more clearly illustrate the technical solutions in the embodiments of this specification or the prior art, the following will briefly introduce the drawings required in the embodiments. Obviously, the drawings in the following description are only some embodiments of this specification. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0043] Figure 1 It is a flowchart of a method for processing the vehicle tailgate reaction force deformation provided by an embodiment of the present invention;

[0044] Figure 2 It is a control table for each item index of the tailgate strength design provided by an embodiment of the present invention;

[0045] Figure 3 It is a strength distribution nephogram output by the tailgate assembly model provided by an embodiment of the present invention;

[0046] Figure 4 It is a tailgate deformation nephogram provided by an embodiment of the present invention;

[0047] Figure 5a It is a schematic diagram of the adjustment of the tailgate top cover area provided by an embodiment of the present invention Figure 1 ;

[0048] Figure 5b It is a schematic diagram of the adjustment of the tailgate top cover area provided by an embodiment of the present invention Figure 2 ;

[0049] Figure 6 It is a schematic diagram of the calculation of the third offset provided by an embodiment of the present invention Figure 1 ;

[0050] Figure 7 It is a schematic diagram of the calculation of the third offset provided by an embodiment of the present invention Figure 2 ;

[0051] Figure 8 It is a schematic diagram of the basic plane provided by an embodiment of the present invention;

[0052] Figure 9 It is a schematic diagram of the reference plane provided by an embodiment of the present invention;

[0053] Figure 10 Schematic diagram of the set of reverse deformation points of the tailgate provided by the embodiment of the present invention;

[0054] Figure 11 Schematic diagram of the set of reverse deformation surfaces of the tailgate provided by the embodiment of the present invention;

[0055] Figure 12 Schematic diagram of the tailgate compensation data provided by the embodiment of the present invention;

[0056] Figure 13a Schematic of the shielding structure provided by the embodiment of the present invention Figure 1 ;

[0057] Figure 13b Schematic of the shielding structure provided by the embodiment of the present invention Figure 2 ;

[0058] Figure 13c Schematic of the shielding structure provided by the embodiment of the present invention Figure 3 ;

[0059] Figure 14 Timing diagram of the method for processing the reaction force deformation of the vehicle tailgate provided by the embodiment of the present invention;

[0060] Figure 15 Schematic structural diagram of a device for processing the reaction force deformation of a vehicle tailgate provided by the embodiment of the present invention. Detailed implementation manners

[0061] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art belong to the scope of protection of the embodiments of the present invention.

[0062] The gap surface difference characterizes the appearance quality at the connection between the sheet metal attachment and the vehicle body, including the gap size and the smoothness of the transition. The existing process for adjusting the gap surface difference of the tailgate is as follows: First, release the engineering data according to the requirements of the design styling surface (or A-surface), determine the dimension technical specifications (DTS), mold according to the engineering data, assemble and adjust the tailgate as required, check the gap surface difference after general assembly through general assembly technology, and then conduct quality evaluation. If the quality is qualified, it is determined as a qualified product; if the quality evaluation fails, adjust the welding fixture, and fine-tune the styling surface according to the feedback when the adjustment amount is insufficient. Due to the long dimension chain, many parts involved, and long adjustment time during the tailgate assembly, the process determination is not in place, the feedback time is late, and the manufacturing change cycle is insufficient, which affects the production cycle and quality stability of the whole vehicle.

[0063] Therefore, according to the current conventional methods for verification (adjusting the welding fixture, changing the part molds, and using forced adjustment special means), the following problems will occur in the overall vehicle appearance around the adjusted tailgate:

[0064] 1) Severe local assembly and adjustment out-of-tolerance: The reaction force deformation displacement of the tailgate is large, the gap / surface difference between the roof and the tailgate becomes larger or smaller, and the gap between the spoiler and the side panel is small, resulting in problems such as interference in the opening movement of the tailgate or scratching of the paint.

[0065] 2) Late exposure time of appearance problems: After the part precision is stabilized, the gap surface difference problems are exposed in the late stage of the project trial production (especially when it is about to be put into production), which affects the test verification effect. The gap surface difference in the trial production workshop is unqualified, and the test verification cannot reflect the final overall vehicle state, resulting in after-sales quality problems after production; The time for proposing design changes is late, and it is difficult to fundamentally solve the problem due to the insufficient modification cycle of relevant parts, and there are problems with unstable quality after production.

[0066] 3) Secondary regeneration problems caused after adjustment by special means: Special means such as forcibly adjusting the position of the hinge reinforcement plate and bending the sheet metal by hand will cause problems such as movement interference or deformation and cracking of after-sales parts.

[0067] Next, in combination with the processing method of the embodiments of the present invention, it will be elaborated on how to solve the problem that the reaction force deformation of the vehicle tailgate will cause a large tailgate gap to be exposed in the vehicle tailgate, which is difficult to meet the vehicle appearance quality requirements.

[0068] Please refer to Figure 1 , the embodiments of the present invention provide a flowchart of a processing method for the reaction force deformation of a vehicle tailgate, including:

[0069] S11. Obtain the tailgate assembly model.

[0070] Specifically, the tailgate assembly model is a model that meets the design requirements for the strength and stiffness of the tailgate. Please refer to Figure 2, The items required for the tailgate strength design include the fixed end of the hinge top cover, the fixed end of the pneumatic strut on the vehicle body, the fixed end of the hinge on the tailgate, and the fixed end of the pneumatic strut on the tailgate, and their plastic strains should all be less than 0.2%. Please refer to Figure 3 , After the tailgate assembly model is modeled, the strength contour map can be output through CAE (Computer Aided Engineering) software for the tailgate strength design. Among them, the CAE software can be CATIA software, or of course other software that can perform auxiliary design. It can be understood that the prerequisite is to make the tailgate assembly model first meet the design standards. If not, design optimization is carried out from the structure; when the requirements are met, after obtaining the tailgate assembly model, enter step S12.

[0071] S12. Conduct a force analysis on the tailgate assembly model according to the forces exerted by the installation accessories, and obtain the tailgate deformation contour map. Among them, the installation accessories at least include the tailgate pneumatic strut and the tailgate seal.

[0072] Specifically, after the tailgate is installed on the vehicle body, due to the various forces exerted by the installation accessories on the tailgate, these forces will affect the deformation of the tailgate, especially the influence of the tailgate pneumatic strut and the tailgate seal is relatively large. The tailgate deformation contour map obtained by conducting a force analysis on the tailgate assembly model can accurately simulate the force deformation situation of the tailgate under the action of the installation accessory forces. Please refer to Figure 4 , The force analysis can establish the models, force values, loads, force directions, etc. of each installation accessory through CAE software, and obtain the corresponding X-direction, Y-direction, Z-direction and comprehensive deformation position values and the corresponding displacement maps at different positions through CAE means, that is, the tailgate deformation contour map.

[0073] In a specific implementation manner, conducting a force analysis on the tailgate assembly model according to the forces exerted by the installation accessories and obtaining the tailgate deformation contour map includes:

[0074] Determine the acting moments at multiple analysis positions on the tailgate assembly model according to the forces; for each analysis position, determine the deformation amount of the analysis position according to the acting moment of the analysis position; generate the tailgate deformation contour map according to the deformation amounts of the multiple analysis positions.

[0075] Specifically, the acting moment characterizes the magnitude and direction of the force exerted by the installation accessory on the tailgate. According to the acting moment of the analysis position, the deformation amount of the analysis position can be determined. The greater the force, the greater the deformation amount, and vice versa. Through the deformation amounts of multiple analysis positions, the tailgate deformation contour map can be generated. After obtaining the tailgate deformation contour map, enter step S13.

[0076] S13. Determine the target area on the tailgate assembly model according to the tailgate deformation contour map.

[0077] Specifically, the target area is the area in the tailgate deformation nephogram where the deformation amount exceeds the design requirements, which can be determined according to the color distribution of the tailgate deformation nephogram. Different colors in the tailgate deformation nephogram correspond to different deformation sizes. Please continue to refer to Figure 4 , in the taillight area 41 of the tailgate, due to the acting force of the pneumatic strut, the deformation amount is relatively large, which can be determined as the target area. The color gradually changes from deep to light between the two taillight areas 41, and the deformation amount gradually decreases. The deformation amount of the roof area 42 basically remains unchanged. After determining the target area, enter step S14.

[0078] S14. Adjust the tailgate gap and / or the position of the tailgate in the target area.

[0079] Specifically, the influence of the acting force of the installed accessories on the tailgate assembly model may cause the tailgate gap to be too large; it may also cause the position of the tailgate to shift, resulting in the smoothness of the transition between the vehicle body and the tailgate not meeting the requirements. It is possible to make targeted adjustments according to the actual problems in the target area reflected by the tailgate deformation nephogram. The adjustment methods include one or more of the adjustment of the welding fixture, the adjustment of the installation position of the tailgate hinge, or the adjustment of the external dimensions of the tailgate assembly model, as long as the tailgate gap and / or the position of the tailgate can be adjusted to meet the design requirements.

[0080] In a specific implementation manner, the target area is the roof area; adjusting the tailgate gap in the target area includes:

[0081] Determine the first displacement amount of the vehicle body hinge hole according to the horizontal deformation amount of the roof area, where the vehicle body hinge hole is the hinge installation hole on the vehicle body; adjust the tailgate gap within a preset range according to the first displacement amount.

[0082] Specifically, the roof area is the area above the tailgate window, and the horizontal deformation amount of this area can be determined through the tailgate deformation nephogram. Please refer to Figure 5a , the tailgate 51 is usually installed on the vehicle body 53 through the tailgate hinge 52, and the tailgate hinge 52 is installed through the vehicle body hinge hole 54. When the horizontal deformation amount is relatively large, it will cause the tailgate gap to exceed the preset range. Determine the first displacement amount of the vehicle body hinge hole through the horizontal deformation amount. The first displacement amount is the displacement amount of the vehicle body hinge hole from the initial position to the side away from the tailgate hinge. The tailgate gap can be adjusted within the preset range through the first displacement amount.

[0083] In a specific implementation manner, the target area is the roof area; adjusting the tailgate gap and the position of the tailgate in the target area includes:

[0084] Determine the first displacement of the vehicle body hinge hole and the second displacement of the tailgate hinge hole according to the horizontal deformation amount and the vertical deformation amount of the top cover area, where the vehicle body hinge hole is the hinge installation hole on the vehicle body, and the tailgate hinge hole is the hinge installation hole on the tailgate; adjust the tailgate gap and the tailgate position within the preset range according to the first displacement and the second displacement.

[0085] Specifically, please refer to Figure 5a and Figure 5b , the horizontal deformation amount X1 and the vertical deformation amount Z1 can be determined through the tailgate deformation nephogram. The preset range of the tailgate gap can be set within 5 mm; the preset range of the tailgate position can be set such that the top of the tailgate is lower than the top of the vehicle body within 0.6 mm (i.e., within -0.6 mm). Adjust the tailgate gap and the tailgate position within the preset range according to the determined first displacement and second displacement. It should be noted that since the tailgate hinge hole is inclined, it is also possible to only adjust the second displacement of the tailgate hinge hole to make the tailgate gap and the tailgate position within the preset range. For example, if the tailgate hinge hole is inclined by a displacement ▽S, ▽S can be decomposed into ▽X2 and ▽Z2, and then the superposition of X1 - ▽X2 and Z1 - ▽Z2 is judged whether it is within the preset range. If not satisfied, optimization is required, and the finally determined ▽S is the hinge misalignment design compensation amount.

[0086] In a specific implementation manner, the target area is the taillight area or the bottom area; adjusting the tailgate gap and the tailgate position of the target area includes:

[0087] Determine the third offset of the latch mounting hole according to the deformation amount of the taillight area or the bottom area, where the latch mounting hole is the mounting hole for mounting the latch of the tailgate assembly model; adjust the tailgate gap and the tailgate position within the preset range according to the third offset.

[0088] Specifically, please refer to Figures 6 - 7 , the tailgate 61 rotates around the hinge axis 62 of the tailgate hinge. When opening the door, it is supported by a pneumatic strut to be in the open state, and when closing the door, it is locked by the latch 71 on the vehicle body to be in the closed state. The third offset of the latch mounting hole is determined through the deformation amount of the taillight area or the bottom area. The larger the deformation amount, the larger the determined third offset, and vice versa. The third offset represents the offset of the latch mounting hole in the direction of the vehicle head or the vehicle tail. When the tailgate gap is large, the latch mounting hole is adjusted in the direction of the vehicle head with the third offset; when the tailgate gap is small, the latch mounting hole is adjusted in the direction of the vehicle tail with the third offset.

[0089] In a specific implementation manner, determining the third offset of the latch mounting hole according to the deformation amount of the taillight area includes:

[0090] Obtain a first deformation amount according to the average value of the horizontal deformation amounts in the areas of the two taillights on the tailgate assembly model; obtain a second deformation amount according to the average value of the vertical deformation amounts in the areas of the two taillights on the tailgate assembly model; obtain a horizontal offset amount according to the horizontal target position of the tailgate assembly model and the first deformation amount; obtain a vertical offset amount according to the vertical target position of the tailgate assembly model and the second deformation amount; obtain a third offset amount according to the horizontal offset amount and the vertical offset amount.

[0091] Specifically, please continue to refer to Figures 6 - 7 , when determining the third offset amount of the latch mounting hole through the deformation amount in the taillight area or the bottom area, it is first necessary to determine the rotation angle Θ, and the rotation angle depends on the deformation amount in the taillight area or the bottom area. Let ▽S2 be the final pre-adjustment compensation amount of the latch mounting hole.

[0092] First, according to the X-direction and Z-direction deformations in the taillight area, X3 and Z3 on the left, and X4 and Z4 on the right, take the average values of the two places as the first deformation amount X5 and the second deformation amount Z5, determine the horizontal offset amount ▽X6 and the vertical offset amount ▽Z, and conduct multiple optimizations and verifications to enable the tailgate assembly model to reach the horizontal target position and the vertical target position, and then determine the third offset amount ▽S1. Then calculate the angle Θ = ▽S1 / L0, where L0 is the length of this position from the hinge axis. Determine the movement amount of the latch ▽S2 = L1×Θ through the rotation angle Θ. Combine the above ▽S0 and ▽S2 positions, and combine the tolerance requirements to conduct an interference limit check on the system. Conduct the check through the DMU tool of the CATIA software. When the corresponding interference verification requirements are met, determine that the tailgate assembly model meets the final appearance quality requirements. Among them, the dimensional tolerance within the preset range is 1 / 6 - 1 / 8 of the standard tolerance corresponding to the tailgate gap or the tailgate position.

[0093] In a specific implementation manner, the tailgate assembly model is configured as a plastic material; after obtaining the tailgate deformation nephogram by performing a force analysis on the acting force of the installation accessories on the tailgate assembly model, it further includes:

[0094] Determine the target area according to the mapping result of the tailgate deformation nephogram to the outer surface of the tailgate assembly model; generate compensation data for adjusting the tailgate gap and the tailgate position according to the shape and size of the tailgate deformation nephogram in the target area.

[0095] Specifically, since the plastic material tailgate is softer than the metal material tailgate, resulting in a larger overall deformation, a pre-deformation design can be adopted for compensation. Based on the installation accessories on the vehicle, the tailgate is deformed by gravity, the force of the pneumatic strut, the compression reaction force of the sealing strip, and the force of the buffer block. The pre-deformation 3D data, that is, the outer surface of the tailgate assembly model, can be produced by combining the tailgate deformation nephogram of the plastic material tailgate. The mapping result from the tailgate deformation nephogram to the outer surface of the tailgate assembly model represents the deformation amount of the tailgate. If the deformation amount exceeds the preset range, it is determined as the target area. The larger the shape of the tailgate deformation nephogram in the target area, the larger the generated compensation data, and vice versa.

[0096] In specific implementation, the compensation data can be generated by CAE software. Please refer to Figures 8 - 12 , establish the basic plane O through the hinge axis and the meshing point of the tailgate lock. Project the tailgate part (such as the inner panel of the tailgate) onto the basic plane O, and the projection plane is the reference plane A. Draw parallel lines at equal distances horizontally and vertically on the reference plane A, and the intersection points are the reference point set α. According to the CAE results, generate the reverse deformation target point set β at a distance of (-⊿x, -⊿y, -⊿z) from the point set α; generate the target surface B through the point set β, and map the deformation characteristics of the target surface B to the rear tailgate panel based on the reference plane A to generate the deformation size compensation data of the rear tailgate panel. Figure 12 In , the initial surface 121 is the surface without deformation, and the pre-deformed surface 122 is the surface generated by the compensation data. Combining the tolerance requirements, conduct an interference limit check on the pre-deformed data. When the corresponding interference requirements are met, adjust the tailgate gap and the tailgate position through the compensation data to meet the final appearance quality requirements of the tailgate.

[0097] By adjusting in the above manner, the quality requirements of the tailgate gap can generally be met. In special cases, for example, there may be a situation where the target requirements cannot be achieved in the side area of the tailgate.

[0098] In a specific implementation manner, after obtaining the tailgate deformation nephogram by performing a force analysis on the force exerted by the installation accessories on the tailgate assembly model, it further includes:

[0099] Add a preset shielding structure to the edge of the tailgate in the target area to reduce the tailgate gap in the target area. Among them, the formation method of the shielding structure includes at least one of bending deformation of the vehicle body or the tailgate, installing shielding accessories on the edge of the tailgate, and extending the structure of the edge of the tailgate.

[0100] Specifically, through the shielding structure, technical shielding treatment can be performed on the target area to reduce the tailgate gap in the target area and weaken the influence on the appearance effect. Please refer to Figure 13a, after bending and deforming the vehicle body structure, a deformed area 131 can be formed to shield the tailgate gap. The deformed area 131 can also be set on the tailgate as long as it can shield the tailgate gap; for installing shielding accessories on the tailgate edge, please refer to Figure 13b , the shielding accessory 132 can be a black rubber strip. A protrusion can be set on the rubber strip to increase the shielding range of the tailgate gap. The rubber strip is fixed by fasteners or adhesives to shield the tailgate gap; for the structure extension of the tailgate edge, please refer to Figure 13c , the structure extension can extend the rear spoiler 133 of the tailgate to shield the tailgate gap.

[0101] Next, it will be elaborated as a whole on how to process the reaction force deformation of the vehicle tailgate in combination with Figure 14 , and how to process the reaction force deformation of the vehicle tailgate will be elaborated as a whole.

[0102] S1: Input the 3D data of the tailgate (or rear door), and generate a tailgate assembly model.

[0103] S2: Set the stiffness and strength indexes of the tailgate assembly model.

[0104] S3: Conduct CAE stiffness and strength analysis on the initial version of the data. If the target set in S2 is met, proceed to S4 to set the reaction force deformation target; otherwise, return to S1 to optimize the 3D data.

[0105] S4: According to the force conditions of the tailgate (gravity, gas strut force, sealing strip compression reaction force, buffer block force), input its parameters to the CAE department and set the reaction force deformation target value.

[0106] S5: Conduct CAE reaction force deformation analysis based on the input reaction force, and output the deformation position and nephogram. If it is qualified, proceed to the next step; otherwise, return to S1 to continue with the 3D data

[0107] S6.1: If it is a steel tailgate (up and down opening or side-opening tailgate), according to the hinge misalignment optimization design method for steel tailgates, obtain the positions of ▽S0 and ▽S2;

[0108] S6.2: If it is a plastic tailgate, according to the pre-deformation design compensation optimization method for plastic tailgates, obtain the deformation size compensation data of the tailgate panel;

[0109] S7: In order to verify the data optimized in S6, judge whether it meets the target deviation ≤|1σ|. Conduct a re-inspection judgment this time. If it does not meet the requirement, return to the previous step to continue optimizing the compensation data. If it meets the requirement, proceed to the next optimization; if it does not meet the requirement, return to steps S6 - S7 to optimize the data.

[0110] S8: Verify whether the design optimization data output according to the above steps meets the DMU requirement of the limit deviation. Here, it is necessary to verify the movement clearance of the design optimization data under the limit state of the gap surface difference tolerance.

[0111] S9: For the optimized data above S8, if the perception evaluation of the 3D data of the appearance effect is poor under special circumstances, the technical shielding optimization method needs to be carried out according to the deformation-sensitive positions for technical shielding optimization.

[0112] S10: Meeting the requirements of the above S1 - S9, output the final design compensation data, and adjust the tailgate gap and the tailgate position through the compensation data to meet the design quality requirements of the appearance.

[0113] In a second aspect, an embodiment of the present invention further provides a processing device for the reaction force deformation of a vehicle tailgate. Please refer to Figure 15 , including:

[0114] An acquisition module 501, configured to acquire a tailgate assembly model;

[0115] An obtaining module 502, configured to perform a force analysis on the acting force of the installation accessories on the tailgate assembly model to obtain a tailgate deformation nephogram, where the installation accessories at least include a tailgate pneumatic strut and a tailgate seal;

[0116] A first determination module 503, configured to determine a target area on the tailgate assembly model according to the tailgate deformation nephogram;

[0117] An adjustment module 504, configured to adjust the tailgate gap and / or the tailgate position of the target area.

[0118] In an optional embodiment, the obtaining module includes:

[0119] A first determination sub-module, configured to determine the acting moments at multiple analysis positions on the tailgate assembly model according to the acting force;

[0120] A second determination sub-module, configured to determine the deformation amount of each analysis position according to the acting moment of the analysis position;

[0121] A generation sub-module, configured to generate the tailgate deformation nephogram according to the deformation amounts of the multiple analysis positions.

[0122] In an optional embodiment, the target area is a roof area; the adjustment module includes:

[0123] A third determination sub-module, configured to determine a first displacement amount of a body hinge hole according to the horizontal deformation amount of the roof area, where the body hinge hole is a hinge installation hole on the vehicle body;

[0124] A first adjustment sub-module, configured to adjust the tailgate gap within a preset range according to the first displacement amount.

[0125] In an alternative embodiment, the target area is the top cover area; the adjustment module includes:

[0126] A fourth determination sub-module, configured to determine a first displacement of the vehicle body hinge hole and a second displacement of the tailgate hinge hole according to the horizontal deformation amount and the vertical deformation amount of the top cover area, wherein the vehicle body hinge hole is a hinge mounting hole on the vehicle body, and the tailgate hinge hole is a hinge mounting hole on the tailgate;

[0127] A second adjustment sub-module, configured to adjust both the tailgate gap and the tailgate position within a preset range according to the first displacement and the second displacement.

[0128] In an alternative embodiment, the target area is the taillight area or the bottom area; the adjustment module includes:

[0129] A fifth determination sub-module, configured to determine a third offset of the latch mounting hole according to the deformation amount of the taillight area or the bottom area, wherein the latch mounting hole is a mounting hole for mounting a latch that locks the tailgate assembly model;

[0130] A third adjustment sub-module, configured to adjust both the tailgate gap and the tailgate position within a preset range according to the third offset.

[0131] In an alternative embodiment, the fifth determination sub-module includes:

[0132] A first obtaining unit, configured to obtain a first deformation amount according to an average value of the horizontal deformation amounts of the taillight areas on both sides of the tailgate assembly model;

[0133] A second obtaining unit, configured to obtain a second deformation amount according to an average value of the vertical deformation amounts of the taillight areas on both sides of the tailgate assembly model;

[0134] A third obtaining unit, configured to obtain a horizontal offset according to the horizontal target position of the tailgate assembly model and the first deformation amount;

[0135] A fourth obtaining unit, configured to obtain a vertical offset according to the vertical target position of the tailgate assembly model and the second deformation amount;

[0136] A fifth obtaining unit, configured to obtain the third offset according to the horizontal offset and the vertical offset.

[0137] In an alternative embodiment, the tailgate assembly model is configured as a plastic material; the device further includes:

[0138] A second determination module, configured to determine the target area according to the mapping result from the tailgate deformation nephogram to the outer surface of the tailgate assembly model;

[0139] A generation module, configured to generate compensation data for adjusting the tailgate gap and the position of the tailgate according to the shape and size of the tailgate deformation nephogram in the target area.

[0140] In an optional embodiment, the device further includes:

[0141] An adding module, configured to add a preset shielding structure to the edge of the tailgate in the target area to reduce the tailgate gap in the target area, where the forming method of the shielding structure includes at least one of bending deformation of the vehicle body or the tailgate, installing a shielding accessory on the edge of the tailgate, and extending the structure of the edge of the tailgate.

[0142] The technical solution provided in the embodiment of the present invention has at least the following technical effects or advantages:

[0143] 1. By obtaining the tailgate assembly model, performing a force analysis on the force exerted by the installation accessory on the tailgate assembly model, and obtaining the tailgate deformation nephogram to obtain the deformation condition of the tailgate assembly model due to the force, it is possible to determine the target area where the tailgate gap and / or the position of the tailgate need to be adjusted on the tailgate assembly model. On this basis, more accurate corresponding adjustments can be made, thereby improving the processing quality of the vehicle tailgate reaction force deformation. After application in production, the appearance quality of the connection position between the tailgate and the vehicle body is higher.

[0144] 2. The technical solution of the embodiment of the present invention relates to the reaction force deformation design compensation and optimization of the tailgate made of metal material and the tailgate made of plastic material, solving the disadvantages of the original technical solution, such as large cost and long cycle for repeated adjustment of welding and modification of parts molds in the later stage. Through the pre-reaction force deformation compensation and optimization technology, the above problems are solved. For the tailgate made of metal material, the tailgate deformation nephogram is obtained through the CAE stiffness and strength and reaction force deformation principle. After meeting the stiffness and strength targets, it is realized through the hinge misalignment adjustment process method, the design of reverse compensation optimization, and the appearance quality design shielding method. For the tailgate made of plastic material, after obtaining the tailgate deformation nephogram through CAE analysis, through the deformation compensation and optimization of the plastic material tailgate, the pre-compensation optimization data of the tailgate is obtained for mold opening and processing, which can improve the qualification rate of the tailgate gap and surface difference and the appearance quality, and enhance the soft power and brand image of the product.

[0145] 3. The technical solution of the present invention saves a great deal of time in the project R & D stage, and minimizes the risks of difficult later process adjustment, long cycle, and high cost of modifying parts and molds, which may lead to poor perceived quality of the production vehicle and inability to guarantee project milestones. Based on the tailgate reaction force analysis and combined with the previous tailgate deformation nephogram, an optimization design method for the reaction force deformation is proposed, which includes the misalignment optimization design of the steel tailgate hinge and the design compensation analysis technology of the plastic tailgate. Combined with the technical masking method of appearance perception, the qualified rate of the appearance gap and surface difference of the production vehicle is greatly improved, and the appearance perception design quality is enhanced. Through application verification in the early stage of the R & D of multiple vehicle models, if the method of the present invention is applied in the early design stage, the cost savings are as follows: for 1 plastic tailgate with uneven gaps between the plastic tailgate and the surrounding environmental parts, the method reduces the mold repair cost of 1.5 million yuan caused by changing the boundary of the plastic tailgate; for 4 steel tailgate vehicle models, the gap between the tailgate and the roof of the first vehicle model in the early stage is large, and the reaction force deformation displacement is large. After the subsequent 4 vehicle models are optimized by this technology, the cost per vehicle is saved by 20 yuan per piece, and the total cost reduction in the production life of the whole vehicle model is about 3 million yuan.

[0146] Those skilled in the art should understand that the embodiments of the present invention may be provided as a method, a system, or a computer program product. Therefore, the present invention may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware aspects. Moreover, the present invention may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0147] The present invention is described with reference to the flowcharts and / or block diagrams of methods, apparatuses (modules, systems), and computer program products according to the embodiments of the present invention. It should be understood that each flow and / or block in the flowcharts and / or block diagrams, as well as the combination of flows and / or blocks in the flowcharts and / or block diagrams, can be realized by computer program instructions. These computer program instructions can be provided to the processors of general-purpose computers, special-purpose computers, embedded computers, or other programmable data processing devices to generate a machine, so that the instructions executed by the processors of the computer or other programmable data processing devices generate means for realizing the functions specified in Figure 1 one or more of the flows Figure 1 or blocks or the combination of blocks.

[0148] These computer program instructions can also be stored in a computer-readable memory that can direct a computer or other programmable data processing device to work in a specific manner, so that the instructions stored in the computer-readable memory generate a manufactured article including instruction means, and the instruction means realizes the functions specified in Figure 1 one or more of the flows Figure 1The functions specified in one or more boxes.

[0149] These computer program instructions can also be loaded onto a computer or other programmable data processing device, so that a series of operation steps are executed on the computer or other programmable device to generate a computer-implemented process. Thus, the instructions executed on the computer or other programmable device provide for implementing the steps of the functions specified in one Figure 1 process or multiple processes and / or boxes Figure 1 or more boxes.

[0150] Although the preferred embodiments of the present invention have been described, those skilled in the art can make additional changes and modifications once they learn the basic creative concepts. Therefore, the appended claims are intended to be construed to include the preferred embodiments as well as all changes and modifications falling within the scope of the present invention.

[0151] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalent technologies, the present invention is also intended to include these modifications and variations.

Claims

1. A method for dealing with the reaction force deformation of a vehicle tailgate, characterized in that, Including: Obtain the tailgate assembly model; Perform a force analysis on the force exerted by the installation accessories on the tailgate assembly model to obtain a tailgate deformation nephogram, where the installation accessories at least include a tailgate pneumatic strut and a tailgate seal; Determine a target area on the tailgate assembly model according to the tailgate deformation nephogram, where the target area is the area where the deformation amount exceeds the design requirements in the tailgate deformation nephogram; Adjust the tailgate gap and / or the tailgate position of the target area; The tailgate assembly model is configured as a plastic material; after performing a force analysis on the force exerted by the installation accessories on the tailgate assembly model to obtain a tailgate deformation nephogram, it further includes: Determine the target area according to the mapping result of the tailgate deformation nephogram to the outer surface of the tailgate assembly model, where the outer surface of the tailgate assembly model is pre-deformed 3D data; Generate compensation data for adjusting the tailgate gap and the tailgate position according to the shape and size of the target area in the tailgate deformation nephogram.

2. The method for processing the reaction force deformation of a vehicle tailgate according to claim 1, characterized in that, The performing a force analysis on the force exerted by the installation accessories on the tailgate assembly model to obtain a tailgate deformation nephogram includes: Determine the acting moments at multiple analysis positions on the tailgate assembly model according to the force; For each of the analysis positions, determine the deformation amount of the analysis position according to the acting moment of the analysis position; Generate the tailgate deformation nephogram according to the deformation amounts at the multiple analysis positions.

3. The method for processing the reaction force deformation of a vehicle tailgate according to claim 1, characterized in that The target area is the roof area; the adjusting the tailgate gap of the target area includes: Determine the first displacement amount of the body hinge hole according to the horizontal deformation amount of the roof area, where the body hinge hole is the hinge installation hole on the vehicle body; Adjust the tailgate gap within a preset range according to the first displacement amount.

4. The method for processing the reaction force deformation of the vehicle tailgate according to claim 1, wherein The target area is the roof area; the adjusting the tailgate gap and the tailgate position of the target area includes: Determine the first displacement amount of the body hinge hole and the second displacement amount of the tailgate hinge hole according to the horizontal deformation amount and the vertical deformation amount of the roof area, where the body hinge hole is the hinge installation hole on the vehicle body, and the tailgate hinge hole is the hinge installation hole on the tailgate; Adjust both the tailgate gap and the tailgate position within a preset range according to the first displacement amount and the second displacement amount.

5. The method for processing the reaction force deformation of a vehicle tailgate according to claim 1, characterized in that, The target area is the taillight area or the bottom area; the adjusting the tailgate gap and the tailgate position of the target area includes: Determine the third offset amount of the latch installation hole according to the deformation amount of the taillight area or the bottom area, where the latch installation hole is the installation hole for installing the latch that locks the tailgate assembly model; Adjust both the tailgate gap and the tailgate position within a preset range according to the third offset amount.

6. The method for processing the reaction force deformation of a vehicle tailgate according to claim 5, wherein The determining the third offset amount of the latch installation hole according to the deformation amount of the taillight area includes: Obtain the first deformation amount according to the average value of the horizontal deformation amounts of the taillight areas on both sides of the tailgate assembly model; Obtain the second deformation amount according to the average value of the vertical deformation amounts of the taillight areas on both sides of the tailgate assembly model; Obtain a horizontal offset according to the horizontal target position of the tailgate assembly model and the first deformation amount; Obtain a vertical offset according to the vertical target position of the tailgate assembly model and the second deformation amount; Obtain the third offset according to the horizontal offset and the vertical offset.

7. The method for processing the reaction force deformation of a vehicle tailgate according to any one of claims 3-5, characterized in that The dimensional tolerance of the preset range is 1 / 6 - 1 / 8 of the corresponding standard tolerance of the tailgate gap or the tailgate position.

8. The method for processing the reaction force deformation of a vehicle tailgate according to claim 1, wherein, After performing a force analysis on the force exerted by the installation accessories on the tailgate assembly model to obtain a tailgate deformation nephogram, it further includes: Add a preset shielding structure to the edge of the tailgate in the target area to reduce the tailgate gap in the target area, wherein the formation method of the shielding structure includes at least one of bending deformation of the vehicle body or the tailgate, installing a shielding accessory on the edge of the tailgate, and extending the structure of the edge of the tailgate.

9. A processing device for the reaction force deformation of a vehicle tailgate, characterized in that, It includes: An acquisition module for acquiring a tailgate assembly model; An obtaining module for performing a force analysis on the force exerted by the installation accessories on the tailgate assembly model to obtain a tailgate deformation nephogram, wherein the installation accessories at least include a tailgate pneumatic strut and a tailgate seal; A first determination module for determining a target area on the tailgate assembly model according to the tailgate deformation nephogram, wherein the target area is the area where the deformation amount exceeds the design requirements in the tailgate deformation nephogram; An adjustment module for adjusting the tailgate gap and / or the tailgate position in the target area; The tailgate assembly model is configured with a plastic material; the device further includes: A second determination module for determining the target area according to the mapping result of the tailgate deformation nephogram to the outer surface of the tailgate assembly model, wherein the outer surface of the tailgate assembly model is pre-deformed 3D data; A generation module for generating compensation data for adjusting the tailgate gap and the tailgate position according to the shape and size of the target area in the tailgate deformation nephogram.

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