A method for calculating the tolerance of the circumference of the active rear wing of an automobile

Abstract

The present application relates to a method for calculating the circumference tolerance of an active rear wing of an automobile, which comprises the following steps: in a three-dimensional dimension tolerance analysis software, a rear center position lamp model, a rear wing trim panel model, an active rear wing model, and a trunk lid model are assembled with a body assembly model to restrict the movement of the rear center position lamp model, the rear wing trim panel model, the active rear wing model, and the trunk lid model along the X, Y, and Z axes and the rotation around the X, Y, and Z axes; a constraint point is added to at least one of the rear center position lamp model, the rear wing trim panel model, and the trunk lid model, and the circumference tolerance value of the active rear wing model and the trunk lid model is calculated, so that the circumference tolerance value of the active rear wing model is within a target range value. The deformation factor during the assembly of the parts can be taken into account, so that the calculated circumference tolerance value of the active rear wing model is within the target range value.

Description

Technical Field

[0001] The invention relates to the field of automobile active rear wing, and in particular to a method for calculating the circumference tolerance of an automobile active rear wing. Background Art

[0002] The active rear wing of the car has become very popular in China in recent years because of its high appearance, strong sense of technology, and ability to block the airflow that was originally going to flow downward, so that the air resistance forms a downward pressure, which can offset the lift as much as possible, effectively control the downward pressure of the airflow, and reduce the drag coefficient accordingly, thus achieving the effect of reducing fuel. Compared with the previous ordinary tailgate, it has higher requirements for manufacturing precision. Before, the tailgate was not equipped with an active rear wing, and the tailgate structure was relatively simple. Now with the active rear wing, the shape is complex, and there are many matching gaps, so the manufacturing requirements are higher.

[0003] In the related technology, the simulation software uses a self-positioning assembly method when calculating the tolerances around the active rear wing model of a car. The self-positioning assembly method is to perform simulation calculations under a purely theoretical state, ignoring the fact that parts can deform themselves due to the influence of tolerances, resulting in inaccurate tolerance calculations around the active rear wing model, leading to high subsequent manufacturing costs and poor assembly quality. Summary of the invention

[0004] The present application provides a method for calculating the circumference tolerance of an active rear wing of an automobile. Based on three-dimensional dimensional tolerance analysis software, a rear center position lamp model, a rear wing trim panel mounting model, an active rear wing model, and a trunk lid model are assembled with a vehicle body assembly model under constraints. An operation of adding constraint points can be performed on at least one of the rear center position lamp model, the rear wing trim panel mounting model, and the trunk lid model, and deformation factors during assembly of components are taken into account, so that the calculated circumference tolerance value of the active rear wing model is within a target range value.

[0005] In a first aspect, an embodiment of the present application provides a method for calculating the circumference tolerance of an active rear wing of an automobile, which comprises the following steps:

[0006] In the 3D dimension tolerance analysis software, the rear center position lamp model, the tail wing trim panel model, the active tail wing model, and the trunk lid model are assembled with the body assembly model to restrict the movement of the rear center position lamp model, the tail wing trim panel model, the active tail wing model, and the trunk lid model along the X, Y, and Z axes, and the rotation around the X, Y, and Z axes;

[0007] Add constraint points to at least one of the rear center position lamp model, the rear wing trim panel model, and the trunk lid model, and calculate the circumference tolerance value of the active rear wing model and the trunk lid model, so that the circumference tolerance value of the active rear wing model is within a target range value.

[0008] In combination with the first aspect, in one implementation, the assembly constraints are performed on the rear center position lamp model, the rear wing trim panel model, the active rear wing model, and the trunk lid model with the vehicle body assembly model in the three-dimensional dimensional tolerance analysis software to limit the movement of the rear center position lamp model, the rear wing trim panel model, the active rear wing model, and the trunk lid model along the X, Y, and Z axes and the rotation around the X, Y, and Z axes, including:

[0009] The rear center position lamp model is positioned on the trunk lid model by using the first constraint point T1 and the second constraint point T2, and the rear center position lamp model is restricted from moving along the Z axis and rotating around the X axis; wherein the first constraint point T1 and the second constraint point T2 are spaced apart along the Y axis;

[0010] The rear center position lamp model is positioned on the trunk lid model by using the third constraint point T3, and the rear center position lamp model is restricted from moving along the Y axis; wherein the third constraint point T3 is located between the first constraint point T1 and the second constraint point T2;

[0011] The rear center position lamp model is positioned on the trunk lid model by using three fourth constraint points T4, and the rear center position lamp model is restricted from moving along the X axis, rotating around the Y axis, and rotating around the Z axis; wherein the three fourth constraint points T4 are spaced apart along the Y axis.

[0012] In combination with the first aspect, in one implementation manner, adding constraint points to at least one of the rear center position lamp model, the rear wing trim panel model, and the trunk lid model, and calculating the circumference tolerance value of the active rear wing model and the trunk lid model, so that the circumference tolerance value of the active rear wing model is within the target range value includes:

[0013] The number of the fourth constraint points T4 is increased sequentially along the Y-axis direction until the circumferential tolerance value of the rear center position lamp model is within the target range value.

[0014] In combination with the first aspect, in one implementation, the step of sequentially increasing the number of fourth constraint points T4 along the Y-axis direction until the circumference tolerance value of the rear center position lamp model is within a target range value includes:

[0015] The number of fourth constraint points T4 is increased in sequence along the Y-axis direction, and the two outermost fourth constraint points T4 are offset away from each other along the Y-axis until the circumferential tolerance value of the rear center position lamp model is within the target range value.

[0016] In combination with the first aspect, in one implementation, the assembly constraints are performed on the rear center position lamp model, the rear wing trim panel model, the active rear wing model, and the trunk lid model with the vehicle body assembly model in the three-dimensional dimensional tolerance analysis software to limit the movement of the rear center position lamp model, the rear wing trim panel model, the active rear wing model, and the trunk lid model along the X, Y, and Z axes and the rotation around the X, Y, and Z axes, including:

[0017] Two seventh constraint points T7 are used to position the tail wing trim panel model on the trunk lid model, and the tail wing trim panel model is restricted from moving along the X axis and rotating around the Z axis; wherein the two seventh constraint points T7 are spaced apart along the Y axis;

[0018] The tail wing trim panel model is positioned on the trunk lid model by using the eighth constraint point T8 to restrict the movement of the tail wing trim panel model along the Y axis; wherein the eighth constraint point T8 is located between the two seventh constraint points T7;

[0019] Two fifth constraint points T5 are used to position the tail wing trim panel mounting model on the rear center position light model, and two sixth constraint points T6 are used to position the tail wing trim panel mounting model on the trunk lid model, restricting the tail wing trim panel mounting model from moving along the Z axis and rotating around the X axis and the Y axis; wherein, the two fifth constraint points T5 are spaced apart along the Y axis, the two sixth constraint points T6 are spaced apart along the Y axis, and the fifth constraint point T5 and the sixth constraint point T6 are spaced apart along the X axis.

[0020] In combination with the first aspect, in one implementation manner, adding constraint points to at least one of the rear center position lamp model, the rear wing trim panel model, and the trunk lid model, and calculating the circumference tolerance value of the active rear wing model and the trunk lid model, so that the circumference tolerance value of the active rear wing model is within a target range value, includes:

[0021] The number of the fifth constraint points T5 is increased sequentially along the Y-axis direction until the circumferential tolerance value of the tail wing trim panel mounting model is within the target range value.

[0022] In combination with the first aspect, in one implementation, the assembly constraints are performed on the rear center position lamp model, the rear wing trim panel model, the active rear wing model, and the trunk lid model with the vehicle body assembly model in the three-dimensional dimensional tolerance analysis software to limit the movement of the rear center position lamp model, the rear wing trim panel model, the active rear wing model, and the trunk lid model along the X, Y, and Z axes and the rotation around the X, Y, and Z axes, including:

[0023] Three thirteenth constraint points T13 are used to position the trunk lid model on the vehicle body assembly model, and the trunk lid model is restricted to move along the Z axis and rotate around the X and Y axes; wherein the first thirteenth constraint point T13 and the second thirteenth constraint point T13 are spaced apart along the Y axis direction and are distributed on opposite sides of the trunk lid model, and the third thirteenth constraint point T13 and the first thirteenth constraint point T13 are located on the same side of the trunk lid model;

[0024] Two fourteenth constraint points T14 are used to position the trunk lid model on the vehicle body assembly model, and the trunk lid model is restricted from moving along the X axis and rotating around the Z axis; wherein the fourteenth constraint points T14 are spaced apart along the Y axis direction;

[0025] The seventh selected point t4a is used to position the trunk lid model on the vehicle body assembly model, restricting the trunk lid model from moving along the Y axis; wherein the seventh selected point t4a is located between the first thirteenth constraint point T13 and the third thirteenth constraint point T13.

[0026] In combination with the first aspect, in one embodiment, a fourth thirteenth constraint point T13 is added to the trunk lid model, and the gap difference between the third thirteenth constraint point T13 and the fourth thirteenth constraint point T13 is manually adjusted until the gap difference is within the target range value; wherein, the third thirteenth constraint point T13 and the fourth thirteenth constraint point T13 are spaced apart along the Y-axis direction and are distributed on opposite sides of the trunk lid model.

[0027] In combination with the first aspect, in one implementation, after adding a fourth thirteenth constraint point T13 to the trunk lid model and manually adjusting the gap difference between the third thirteenth constraint point T13 and the fourth thirteenth constraint point T13 until the gap difference is within a target range, the method includes:

[0028] An eighth selected point t4b is added to the trunk lid model, and a fourth fitting constraint point T4 is fitted through the seventh selected point t4a and the eighth selected point t4b; wherein the seventh selected point t4a and the eighth selected point t4b are spaced apart along the Y-axis direction and are distributed on opposite sides of the trunk lid model;

[0029] The fourth fitting constraint point T4 is manually adjusted until the face differences at the seventh selected point t4a and the eighth selected point t4b are within the target range.

[0030] In combination with the first aspect, in one implementation, after adding a fourth thirteenth constraint point T13 to the trunk lid model and manually adjusting the gap difference between the third thirteenth constraint point T13 and the fourth thirteenth constraint point T13 until the gap difference is within a target range, the method includes:

[0031] The face differences at the two fourteenth constraint points T14 are manually adjusted until the face differences are within the target range.

[0032] The beneficial effects brought by the technical solution provided in the embodiments of the present application include:

[0033] In the three-dimensional dimension tolerance analysis software, the rear center position lamp model, the rear wing trim panel model, the active rear wing model and the trunk lid model are assembled with the body assembly model to limit the movement of the rear center position lamp model, the rear wing trim panel model, the active rear wing model and the trunk lid model along the X, Y and Z axes and the rotation around the X, Y and Z axes; adding constraint points to at least one of the rear center position lamp model, the rear wing trim panel model and the trunk lid model can make the rear center position lamp model, the rear wing trim panel model or the trunk lid model simulate an assembly situation close to the real deformation, so that the circumferential tolerance value of the active rear wing model is within the target range value, thereby improving the problems of high subsequent manufacturing cost and poor assembly quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0035] Figure 1 A flow chart of a method for calculating the circumference tolerance of an active rear wing of an automobile;

[0036] Figure 2 It is a rear view structural diagram of the trunk lid model;

[0037] Figure 3 is a schematic diagram of the top view of the trunk lid model;

[0038] Figure 4 It is a top view structural diagram of the active tail model;

[0039] Figure 5 A schematic diagram of a top view of a trunk lid model equipped with a tail wing trim panel model;

[0040] Figure 6 Schematic diagram of the rear view structure of the trunk lid model equipped with the rear center position light model.

[0041] In the figure:

[0042] 1. Trunk lid model; 2. Rear center position light model; 3. Rear wing trim panel model; 4. Active rear wing model;

[0043] T1, first constraint point; T2, second constraint point; T3, third constraint point; T4, fourth constraint point; T5, fifth constraint point; T6, sixth constraint point; T7, seventh constraint point; T8, eighth constraint point; T9, ninth constraint point; T10, tenth constraint point; T11, eleventh constraint point; T12, twelfth constraint point; T13, thirteenth constraint point; T14, fourteenth constraint point;

[0044] t1, the first fitting constraint point; t1a, the first selected point; t1b, the second selected point;

[0045] t2, the second fitting constraint point; t2a, the third selected point; t2b, the fourth selected point;

[0046] t3, the third fitting constraint point; t3a, the fifth selected point; t3b, the sixth selected point;

[0047] t4, fourth fitting constraint point; t4a, seventh selected point; t4b, eighth selected point. DETAILED DESCRIPTION

[0048] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0049] A method for calculating the tolerance of the active rear wing circumference of an automobile is provided in an embodiment of the present application. The active rear wing circumference can be designed using a three-dimensional dimension chain. Through simulation calculation of the three-dimensional dimension chain, the current manufacturing capabilities can be perfectly presented, making the actual vehicle manufacturing results more refined and more beautiful.

[0050] It should be noted that the X-axis direction in the accompanying drawings is the length direction of the vehicle body, the Y-axis direction is the width direction of the vehicle body, and the Z-axis direction is the height direction of the vehicle body. The three-dimensional dimension tolerance analysis software used can be 3DCS software.

[0051] like Figure 1 As shown, in an embodiment of the present application, a method for calculating the circumference tolerance of an active rear wing of an automobile is provided, which comprises the following steps:

[0052] Step S100: assembling the rear center position lamp model 2, the rear wing trim panel model 3, the active rear wing model 4, and the trunk lid model 1 with the vehicle body assembly model in the three-dimensional dimension tolerance analysis software to restrict the movement of the rear center position lamp model 2, the rear wing trim panel model 3, the active rear wing model 4, and the trunk lid model 1 along the X, Y, and Z axes and the rotation around the X, Y, and Z axes;

[0053] Step S200: adding constraint points to at least one of the rear center position light model 2, the rear wing trim panel model 3 and the trunk lid model 1, and calculating the circumferential tolerance value of the active rear wing model 4 and the trunk lid model 1, so that the circumferential tolerance value of the active rear wing model 4 is within the target range value.

[0054] Among them, in the three-dimensional dimensional tolerance analysis software, the rear center position light model 2, the rear wing trim panel model 3, the active rear wing model 4 and the trunk lid model 1 are assembled with the body assembly model to limit the movement of the rear center position light model 2, the rear wing trim panel model 3, the active rear wing model 4 and the trunk lid model 1 along the X, Y and Z axes and the rotation around the X, Y and Z axes; adding constraint points to at least one of the rear center position light model 2, the rear wing trim panel model 3 and the trunk lid model 1 can make the rear center position light model 2, the rear wing trim panel model 3 or the trunk lid model 1 simulate an assembly condition close to the actual deformation, so that the circumferential tolerance value of the active rear wing model 4 is within the target range value, thereby improving the problems of high subsequent manufacturing cost and poor assembly quality.

[0055] In step S100, if Figure 2 As shown, the following steps may be included:

[0056] Step S100-1: Use the first constraint point T1 and the second constraint point T2 to position the rear center position light model 2 on the trunk lid model 1, and restrict the rear center position light model 2 from moving along the Z axis and rotating around the X axis; wherein, the first constraint point T1 and the second constraint point T2 are spaced apart along the Y axis; wherein, in order to facilitate assembly of the first constraint point T1 and the second constraint point T2, there is a 0.2 mm margin of activity between the hole and the pin. In the theoretical model, the pin is in the middle of the hole, but in reality, the rear center position light model 2 will be affected by gravity, and during on-site assembly, the pin will only contact the hole near the -Z end. Therefore, during assembly, set the assembly angle in "Options" to -30° to 30°, and the pin and the hole will only contact at the lower edge, which is more in line with the actual assembly situation.

[0057] Step S100-2: using the third constraint point T3 to position the rear center position lamp model 2 on the trunk lid model 1, and restricting the rear center position lamp model 2 from moving along the Y axis; wherein the third constraint point T3 is located between the first constraint point T1 and the second constraint point T2;

[0058] Step S100-2: Use three fourth constraint points T4 to position the rear center position light model 2 on the trunk lid model 1, restricting the rear center position light model 2 from moving along the X-axis, rotating around the Y-axis and rotating around the Z-axis; wherein the three fourth constraint points T4 are spaced apart along the Y-axis.

[0059] Wherein, in step S200, if Figure 2 As shown, the following steps may be included:

[0060] Step S200-1: The number of fourth constraint points T4 is sequentially increased along the Y-axis direction until the circumferential tolerance value of the rear center position lamp model 2 is within the target range value. Increasing the number of fourth constraint points T4 can constrain the rear center position lamp model 2 to position it, so that the rear center position lamp model 2 is deformed to be more in line with the actual assembly situation, and the circumferential tolerance between the rear center position lamp model 2 and the trunk lid model 1 is increased, thereby increasing the circumferential tolerance range value of the active rear wing model 4.

[0061] Further, in step S200, if Figure 2 As shown, the following steps may also be included:

[0062] Step S200-2: The number of fourth constraint points T4 is increased in sequence along the Y-axis direction, and the two outermost fourth constraint points T4 are offset in the direction away from each other along the Y-axis until the circumferential tolerance value of the rear center position lamp model 2 is within the target range value. Among them, the two outermost fourth constraint points T4 are moved outward, that is, the tightening points are moved outward, and the positioning points are moved outward, resulting in a reduction in the amount of free movement of the outermost measurement points, and the calculation results will also become smaller, thereby increasing the circumferential tolerance between the rear center position lamp model 2 and the trunk lid model 1, thereby increasing the circumferential tolerance range value of the active rear wing model 4.

[0063] In step S100, if Figure 3 As shown, the following steps may also be included:

[0064] Step S100-4: Use two seventh constraint points T7 to position the rear wing trim panel model 3 on the trunk lid model 1, and restrict the rear wing trim panel model 3 from moving along the X-axis and rotating around the Z-axis; wherein, the two seventh constraint points T7 are spaced apart along the Y-axis; specifically, in order to facilitate the rear wing trim panel model 3 to be well snapped in, there is a single-sided activity margin of 0.1mm between the seventh constraint points T7. In traditional assembly, the locating pins of the rear wing trim panel model 3 will be at any position in the single-sided activity space of 0.1mm. However, due to inertia during the driving of the car, the rear wing trim panel model 3 will be pushed in the +X direction and -X direction. This situation is what will occur during the driving process of the actual car. In order to meet the simulation close to reality, when performing simulation calculations, the design "Options" is only at 0° and 360°.

[0065] Step S100-5: using the eighth constraint point T8 to position the spoiler trim panel model 3 on the trunk lid model 1, and restricting the movement of the spoiler trim panel model 3 along the Y axis; wherein the eighth constraint point T8 is located between the two seventh constraint points T7;

[0066] Step S100-6: Use two fifth constraint points T5 to position the rear wing trim panel model 3 on the rear center position light model 2, and use two sixth constraint points T6 to position the rear wing trim panel model 3 on the trunk lid model 1, restricting the rear center position light model 2 from moving along the Z axis and rotating around the X axis and the Y axis; wherein the two fifth constraint points T5 are spaced apart along the Y axis, the two sixth constraint points T6 are spaced apart along the Y axis, and the fifth constraint point T5 and the sixth constraint point T6 are spaced apart along the X axis.

[0067] Among them, the active rear wing model 4 can automatically rise when the car is driving to reduce air resistance. If the sheet metal is leaked during the raising process, it will affect the overall appearance. Therefore, it is necessary to first assemble a rear wing trim panel model 3 on the trunk lid model 1, and then assemble the active rear wing model 4 on the rear wing trim panel model 3. In this way, when the active rear wing model 4 is raised, the rear wing trim panel model 3 with better appearance is also exposed.

[0068] In this step, the tail wing trim panel model 3 is assembled on the trunk lid model 1 in a self-positioning manner, and the "User-DLLMove" assembly is used in the software to simulate this process; the fifth constraint point T5 is the tail wing trim panel model 3 assembled on the rear center position light model 2, and the sixth constraint point T6 is the buckle assembled on the trunk lid model 1. The fifth constraint point T5 and the sixth constraint point T6 are combined to control the movement of the tail wing trim panel model 3 along the Z direction, and the rotation around the X axis and the Y axis, with a total of 3 degrees of freedom. The seventh constraint point T7 can be the two positioning pins of the tail wing trim panel model 3 positioned on the trunk lid model 1. The two seventh constraint points T7 control the movement of the tail wing trim panel model 3 along the X direction and the rotation around the Z axis. The eighth constraint point T8 limits the movement of the tail wing trim panel model 3 along the Y direction. In this way, the tail wing trim panel model 3 is completely positioned.

[0069] Further, in step S200, if Figure 3 As shown, the following steps may also be included:

[0070] Step S200-3: The number of fifth constraint points T5 is increased in sequence along the Y-axis direction until the circumferential tolerance value of the tail wing trim panel model 3 is within the target range. The tail wing trim panel model 3 adopts an over-constrained assembly method. The tail wing trim panel model 3 is a plastic part with a relatively soft material. The fifth constraint point T5 attachment will make it develop in the direction of improving the accuracy, so a few T5s must be added. After the increase, the simulation calculation results will be better.

[0071] In step S100, if Figure 6 As shown, the following steps may also be included:

[0072] Step S100-7: using three thirteenth constraint points T13 to position the trunk lid model 1 on the vehicle body assembly model, restricting the trunk lid model 1 from moving along the Z axis and rotating around the X and Y axes; wherein the first thirteenth constraint point T13 and the second thirteenth constraint point T13 are spaced apart along the Y axis direction and are distributed on opposite sides of the trunk lid model 1, and the third thirteenth constraint point T13 and the first thirteenth constraint point T13 are located on the same side of the trunk lid model 1;

[0073] Step S100-8: using two fourteenth constraint points T14 to position the trunk lid model 1 on the vehicle body assembly model, restricting the trunk lid model 1 from moving along the X axis and rotating around the Z axis; wherein the fourteenth constraint points T14 are spaced apart along the Y axis direction;

[0074] Step S100-9: Use the seventh selected point t4a to position the trunk lid model 1 on the vehicle body assembly model to restrict the trunk lid model 1 from moving along the Y axis; wherein the seventh selected point t4a is located between the first thirteenth constraint point T13 and the third thirteenth constraint point T13.

[0075] Among them, the thirteenth constraint point T13, the fourteenth constraint point T14 and the seventh selected point t4a can quickly complete the positioning of the trunk lid model 1 on the vehicle body assembly model.

[0076] Further, in step S200, if Figure 3 As shown, the following steps may also be included:

[0077] Step S200-4: Add a fourth thirteenth constraint point T13 to the trunk lid model 1, and manually adjust the gap difference between the third thirteenth constraint point T13 and the fourth thirteenth constraint point T13 until the gap difference is within the target range value; wherein, the third thirteenth constraint point T13 and the fourth thirteenth constraint point T13 are spaced apart along the Y-axis direction and distributed on opposite sides of the trunk lid model 1.

[0078] Furthermore, after step S200-4, the following steps may also be included:

[0079] Step S200-5: adding an eighth selected point t4b to the trunk lid model 1, and fitting a fourth fitting constraint point T4 through the seventh selected point t4a and the eighth selected point t4b; wherein the seventh selected point t4a and the eighth selected point t4b are spaced apart along the Y-axis direction and are distributed on opposite sides of the trunk lid model 1;

[0080] The fourth fitting constraint point T4 is manually adjusted until the face differences at the seventh selected point t4a and the eighth selected point t4b are within the target range.

[0081] Furthermore, after step S200-4 or step S200-5, the following steps may also be included:

[0082] Step S200 - 6 : Manually adjust the face differences at the two fourteenth constraint points T14 until the face differences are within the target range.

[0083] Specifically, because the trunk lid model 1 is an appearance part and is rigid, it cannot be assembled by forced deformation, so the high-point assembly method is used for adjustment and assembly, and multiple manual adjustment assembly points are added. The face difference at the two thirteenth constraint points T13 on the upper left and right sides is manually adjusted to within the qualified range, and the position of the fourth fitting constraint point T4 is adjusted to make the gaps at the seventh selected point t4a and the eighth selected point t4b consistent with each other on the left and right sides within the qualified range. The face difference at the two fourteenth constraint points T14 is manually adjusted until the face difference is within the target range value.

[0084] In the above embodiment, after step S100-6, the following steps may also be included:

[0085] Step S100-6-1: Assembling and constraining the active tail wing model 4 to the tooling model;

[0086] Step S100 - 6 - 2 : Constrain the tooling model to be assembled on the trunk lid model 1 .

[0087] Specifically, in step S100-6-1, if Figure 4 As shown, the following steps may be included:

[0088] Step S100-6-1-1: Use two ninth constraint points T9 and the first fitting constraint point t1 to position the active tail wing model 4 on the tooling model, and restrict the active tail wing model 4 from moving along the Z axis, rotating around the X axis, and rotating around the Y axis; wherein the two ninth constraint points T9 are spaced apart along the Y axis, and the first fitting constraint point t1 is located in the middle area of ​​the rear end of the active tail wing model 4;

[0089] Step S100-6-1-2: Use the second fitting constraint point t2 to restrict the active tail wing model 4 from moving along the Y axis; wherein the second fitting constraint point t2 is located between the two ninth constraint points T9 and is spaced apart from the first fitting constraint point t1 along the X axis;

[0090] Step S100-6-1-3: Use two tenth constraint points T10 to restrict the active tail wing model 4 from moving along the X-axis and rotating around the Z-axis; wherein the tenth constraint point T10 is located between the ninth constraint point T9 and the second fitting constraint point t2.

[0091] In order to ensure the installation accuracy of the active tail model 4, the active tail model 4 can be first assembled to the tooling model, and then assembled to the trunk lid model 1 through the tooling model; the "SixPlane Move" and "Dynamic Points" commands are used in the software to simulate the process of assembling the active tail model 4 to the tooling model, wherein the first selected point t1a and the second selected point t1b use the "Dynamic Points" command to fit the midpoint of these two assembly points, that is, the first fitting constraint point t1, and the two ninth constraint points T9 and the first fitting constraint point t1 restrict the active tail model 4 to move along the Z axis, rotate around the X axis, and rotate around the Y axis. The third selected point t2a and the fourth selected point t2b use the "Dynamic Points" command to fit the midpoint of these two assembly points, that is, the second fitting constraint point t2, and the second fitting constraint point t2 restricts the active tail model 4 to move along the Y axis. The two tenth constraint points T10 restrict the movement of the active tail model 4 along the Y axis. In this way, the active tail model 4 is completely positioned.

[0092] Among them, in step S100-6-2, if Figure 5 As shown, the following steps may be included:

[0093] Step S100-6-2-1: Use four eleventh constraint points T11 to over-constrain the tooling model to the trunk lid model 1, and restrict the tooling model from moving along the Z axis and rotating around the X axis and the Y axis; wherein, the four eleventh constraint points T11 are distributed around the tooling model; specifically, the tooling model is rigid, and traditional assembly will only select three points here for simulated assembly, but in actual assembly, any three points may be in contact, and each point has a tolerance. Selecting any three points for simulated assembly is inconsistent with the actual situation, and high-point assembly is used here, with four points for assembly, and then identifying the three points with the highest tolerance impact, and making these three points in contact, so as to simulate the actual situation.

[0094] Step S100-6-2-2: using two twelfth constraint points T12 to over-constrain the tooling model to the trunk lid model 1, restricting the tooling model from moving along the X-axis and rotating around the Z-axis; wherein the twelfth constraint points T12 are spaced apart along the Y-axis;

[0095] Step S100-6-2-3: Use the third fitting constraint point t3 to restrict the movement of the tooling model along the Y axis.

[0096] Among them, the eleventh constraint point T11 is the tooling model clamped on the trunk lid model 1, limiting the movement of the tooling model along the Z axis, and the rotation around the X axis and Y axis, a total of 3 degrees of freedom. The twelfth constraint point T12 is the gap on the tooling model, which sticks to the trunk lid model 1 on one side and the active tail wing model 4 on the other side, so that the movement of the tooling model along the X axis and the rotation around the Z axis can be controlled. In the software, the "Hight PointMove" and "Dynamic Points" commands are used to simulate the assembly, in which the fifth selected point t3a and the sixth selected point t3b use the "Dynamic Points" command to fit the midpoint of these two assembly points, that is, the third fitting constraint point t3. The third fitting constraint point t3 also uses the gap to stick to the trunk lid model 1 on one side and the active tail wing model 4 on the other side to control the movement of the tooling model along the Y axis. In this way, the tooling model is completely positioned.

[0097] In the description of the present application, it should be noted that the terms "upper", "lower", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. Unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0098] It should be noted that, in this application, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0099] The above description is only a specific implementation of the present application, so that those skilled in the art can understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest range consistent with the principles and novel features applied for herein.

Claims

1. A method for calculating the circumference tolerance of an active rear wing of an automobile, characterized in that: It includes the following steps: In the 3D dimension tolerance analysis software, the rear center position lamp model, the tail wing trim panel model, the active tail wing model, and the trunk lid model are assembled with the body assembly model to restrict the movement of the rear center position lamp model, the tail wing trim panel model, the active tail wing model, and the trunk lid model along the X, Y, and Z axes, and the rotation around the X, Y, and Z axes; Adding constraint points to at least one of the rear center position lamp model, the rear wing trim panel model, and the trunk lid model, and calculating the circumference tolerance value of the active rear wing model and the trunk lid model, so that the circumference tolerance value of the active rear wing model is within a target range value; The assembly constraints are performed on the rear center position lamp model, the tail wing trim panel model, the active tail wing model and the trunk lid model with the body assembly model in the three-dimensional dimensional tolerance analysis software to limit the movement of the rear center position lamp model, the tail wing trim panel model, the active tail wing model and the trunk lid model along the X, Y and Z axes and the rotation around the X, Y and Z axes, including: The rear center position lamp model is positioned on the trunk lid model by using the first constraint point T1 and the second constraint point T2, and the rear center position lamp model is restricted from moving along the Z axis and rotating around the X axis; wherein the first constraint point T1 and the second constraint point T2 are spaced apart along the Y axis; The rear center position lamp model is positioned on the trunk lid model by using the third constraint point T3, and the rear center position lamp model is restricted from moving along the Y axis; wherein the third constraint point T3 is located between the first constraint point T1 and the second constraint point T2; The rear center position lamp model is positioned on the trunk lid model by using three fourth constraint points T4, and the rear center position lamp model is restricted from moving along the X axis, rotating around the Y axis, and rotating around the Z axis; wherein the three fourth constraint points T4 are spaced apart along the Y axis.

2. The method for calculating the circumference tolerance of an active rear wing of an automobile according to claim 1, characterized in that: The step of adding constraint points to at least one of the rear center position lamp model, the tail wing trim panel model, and the trunk lid model, and calculating the circumference tolerance value of the active tail wing model and the trunk lid model, so that the circumference tolerance value of the active tail wing model is within the target range value includes: The number of the fourth constraint points T4 is increased sequentially along the Y-axis direction until the circumferential tolerance value of the rear center position lamp model is within the target range value.

3. The method for calculating the circumference tolerance of an active rear wing of an automobile as claimed in claim 2, characterized in that: The step of sequentially increasing the number of fourth constraint points T4 along the Y-axis direction until the circumference tolerance value of the rear center position lamp model is within the target range value includes: The number of fourth constraint points T4 is increased in sequence along the Y-axis direction, and the two outermost fourth constraint points T4 are offset away from each other along the Y-axis until the circumferential tolerance value of the rear center position lamp model is within the target range value.

4. The method for calculating the circumference tolerance of an active rear wing of an automobile according to any one of claims 1 to 3, characterized in that: The assembly constraints are performed on the rear center position lamp model, the tail wing trim panel model, the active tail wing model and the trunk lid model with the body assembly model in the three-dimensional dimensional tolerance analysis software to limit the movement of the rear center position lamp model, the tail wing trim panel model, the active tail wing model and the trunk lid model along the X, Y and Z axes and the rotation around the X, Y and Z axes, including: Two seventh constraint points T7 are used to position the tail wing trim panel model on the trunk lid model, and the tail wing trim panel model is restricted from moving along the X axis and rotating around the Z axis; wherein the two seventh constraint points T7 are spaced apart along the Y axis; The tail wing trim panel model is positioned on the trunk lid model by using the eighth constraint point T8 to restrict the movement of the tail wing trim panel model along the Y axis; wherein the eighth constraint point T8 is located between the two seventh constraint points T7; Two fifth constraint points T5 are used to position the tail wing trim panel mounting model on the rear center position light model, and two sixth constraint points T6 are used to position the tail wing trim panel mounting model on the trunk lid model, restricting the tail wing trim panel mounting model from moving along the Z axis and rotating around the X axis and the Y axis; wherein, the two fifth constraint points T5 are spaced apart along the Y axis, the two sixth constraint points T6 are spaced apart along the Y axis, and the fifth constraint point T5 and the sixth constraint point T6 are spaced apart along the X axis.

5. The method for calculating the circumference tolerance of an active rear wing of an automobile as claimed in claim 4, characterized in that: The adding of constraint points to at least one of the rear center position lamp model, the tail wing trim panel model, and the trunk lid model, and calculating the circumference tolerance value of the active tail wing model and the trunk lid model so that the circumference tolerance value of the active tail wing model is within a target range value, includes: The number of the fifth constraint points T5 is increased sequentially along the Y-axis direction until the circumferential tolerance value of the tail wing trim panel mounting model is within the target range value.

6. The method for calculating the circumference tolerance of an active rear wing of an automobile as claimed in claim 1, characterized in that: The assembly constraints are performed on the rear center position lamp model, the tail wing trim panel model, the active tail wing model and the trunk lid model with the body assembly model in the three-dimensional dimensional tolerance analysis software to limit the movement of the rear center position lamp model, the tail wing trim panel model, the active tail wing model and the trunk lid model along the X, Y and Z axes and the rotation around the X, Y and Z axes, including: Three thirteenth constraint points T13 are used to position the trunk lid model on the vehicle body assembly model, and the trunk lid model is restricted to move along the Z axis and rotate around the X and Y axes; wherein the first thirteenth constraint point T13 and the second thirteenth constraint point T13 are spaced apart along the Y axis direction and are distributed on opposite sides of the trunk lid model, and the third thirteenth constraint point T13 and the first thirteenth constraint point T13 are located on the same side of the trunk lid model; Two fourteenth constraint points T14 are used to position the trunk lid model on the vehicle body assembly model, and the trunk lid model is restricted from moving along the X axis and rotating around the Z axis; wherein the fourteenth constraint points T14 are spaced apart along the Y axis direction; The seventh selected point t4a is used to position the trunk lid model on the vehicle body assembly model, restricting the trunk lid model from moving along the Y axis; wherein the seventh selected point t4a is located between the first thirteenth constraint point T13 and the third thirteenth constraint point T13.

7. The method for calculating the circumference tolerance of an active rear wing of an automobile as claimed in claim 6, characterized in that: The adding of constraint points to at least one of the rear center position lamp model, the tail wing trim panel model, and the trunk lid model, and calculating the circumference tolerance value of the active tail wing model and the trunk lid model so that the circumference tolerance value of the active tail wing model is within a target range value, includes: A fourth thirteenth constraint point T13 is added to the trunk lid model, and the gap difference between the third thirteenth constraint point T13 and the fourth thirteenth constraint point T13 is manually adjusted until the gap difference is within the target range value; wherein, the third thirteenth constraint point T13 and the fourth thirteenth constraint point T13 are spaced apart along the Y-axis direction and distributed on opposite sides of the trunk lid model.

8. The method for calculating the circumference tolerance of an active rear wing of an automobile as claimed in claim 7, characterized in that: After adding the fourth thirteenth restraint point T13 to the trunk lid model and manually adjusting the gap difference between the third thirteenth restraint point T13 and the fourth thirteenth restraint point T13 until the gap difference is within the target range, the method includes: An eighth selected point t4b is added to the trunk lid model, and a fourth fitting constraint point T4 is fitted through the seventh selected point t4a and the eighth selected point t4b; wherein the seventh selected point t4a and the eighth selected point t4b are spaced apart along the Y-axis direction and are distributed on opposite sides of the trunk lid model; The fourth fitting constraint point T4 is manually adjusted until the face differences at the seventh selected point t4a and the eighth selected point t4b are within the target range.

9. The method for calculating the circumference tolerance of an active rear wing of an automobile as claimed in claim 7, characterized in that: After adding the fourth thirteenth restraint point T13 to the trunk lid model and manually adjusting the gap difference between the third thirteenth restraint point T13 and the fourth thirteenth restraint point T13 until the gap difference is within the target range, the method includes: The face differences at the two fourteenth constraint points T14 are manually adjusted until the face differences are within the target range.

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