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CN-122020854-A - Design method of front hood of vehicle and vehicle

CN122020854ACN 122020854 ACN122020854 ACN 122020854ACN-122020854-A

Abstract

The embodiment of the invention relates to the technical field of vehicles, and discloses a design method of a front hood of a vehicle and the vehicle, wherein the method comprises the steps of obtaining an initial model of the front hood; dividing a wind window area at the rear side of the front hood initial model, moving the rear edge of the front hood initial model along the negative direction of the Z direction to obtain a front hood adjusted model, judging whether the curvature radius of the wind window area of the front hood adjusted model meets the requirement, judging whether the light and shadow test of the front hood adjusted model meets the requirement, and if the curvature radius of the wind window area of the front hood adjusted model meets the requirement and the light and shadow test of the wind window area of the front hood adjusted model meets the requirement, obtaining the front hood correction model. By applying the technical scheme of the invention, the profile of the wind window area can be moved in the negative direction of the Z axis in the process design stage, the curvature radius is reduced, the rigidity is enhanced, the deformation is inhibited, the light and shadow distortion is eliminated, and the deformation caused by insufficient rigidity of the wind window area is solved.

Inventors

  • HE HAI
  • LIU KAI
  • WANG YI
  • ZHENG JIADONG
  • LONG YANG

Assignees

  • 阿维塔科技(重庆)股份有限公司

Dates

Publication Date
20260512
Application Date
20260129

Claims (10)

  1. 1. A method of designing a front hood of a vehicle, the method comprising: Acquiring an initial model of a front engine cover; Dividing a wind window area at the rear side part of the front hood initial model; The part of the rear edge of the front hood initial model corresponding to the wind window area moves along the negative direction of the Z direction to obtain a front hood adjusted model; Judging whether the curvature radius of the wind window area of the front engine cover adjusted model meets the requirement or not; judging whether the light and shadow test of the front hood adjusted model meets the requirement or not; and if the curvature radius of the wind window area of the front hood adjusted model meets the requirement and the light and shadow test of the wind window area of the front hood adjusted model meets the requirement, obtaining a corrected model of the front hood.
  2. 2. The method according to claim 1, wherein the louver region includes equidistant sections, and distance-changing sections located on both sides of the equidistant sections, both extending in the Y direction, the equidistant sections being provided between the front edge of the equidistant sections and the rear edge of the front hood initial model, and the distance from the front edge of the distance-changing sections to the rear edge of the front hood initial model gradually decreasing in the direction from the front hood middle to the side; The method comprises the steps of moving the rear edge of the front hood initial model to the equidistant section along the negative direction of the Z direction, and gradually reducing the distance of the rear edge of the front hood initial model to the variable-distance section from the first preset distance to 0 along the negative direction of the Z direction in the direction from the middle part to the side part of the front hood.
  3. 3. The method of designing a front hood for a vehicle according to claim 2, characterized in that the first preset distance is in a range of 0.1mm to 0.3 mm.
  4. 4. The method of designing a front hood for a vehicle according to claim 2, wherein the dividing the louver area at the rear side portion of the front hood initial model further includes a convex portion of the front hood corresponding to a boundary position of the equidistant section and the pitch change section.
  5. 5. The method of designing a front hood for a vehicle according to claim 2, wherein dividing the louver region at the rear side portion of the front hood initial model further includes a width of the distance-varying section at an end of the distance-varying section facing away from the equidistant section being 0.
  6. 6. The method of designing a vehicle front hood according to claim 2, characterized in that the width of the equidistant sections is in the range of 50 to 150 mm.
  7. 7. The method of designing a vehicle front cowl according to any one of claims 2 to 6, characterized in that determining whether the radius of curvature of the louver region satisfies a requirement includes: acquiring the curvature of the front hood adjusted model at each position of the equidistant section along the X direction; And judging whether the minimum curvature position of the equidistant section is positioned between the front edge of the equidistant section and the rear edge of the front hood.
  8. 8. The method of designing a vehicle front cowl according to any one of claims 2 to 6, characterized in that determining whether the radius of curvature of the louver region satisfies a requirement includes: acquiring a curvature (a 1) everywhere along the Y-direction of the rear edge of the front hood initial model; acquiring a curvature (a 2) everywhere along the Y-direction of the rear edge of the front hood correction model; Judging whether the curvature of the rear edge of the front hood initial model and the curvature of the rear edge of the front hood correction model meet the following relation: 0.2≤(a2-a1)/a1≤0.35。
  9. 9. the method of designing a front hood for a vehicle according to any one of claims 1 to 6, wherein determining whether the light and shadow test of the front hood adjusted model satisfies a requirement includes: acquiring a first shadow test image of a front hood initial model; acquiring a second shadow test image of the front hood adjusted model; and judging whether the deviation value of the first light shadow test image and the second light shadow test image is smaller than a preset value.
  10. 10. A vehicle characterized by comprising a front hood, which is obtained by the design method of a vehicle front hood according to any one of claims 1-9.

Description

Design method of front hood of vehicle and vehicle Technical Field The embodiment of the invention relates to the technical field of vehicles, in particular to a design method of a front hood of a vehicle and the vehicle. Background In the current vehicle field, the appearance of an automobile, particularly the light shadow of an outer covering part is an important evaluation index, the detection of lamplight and zebra stripes is required to be free from anomalies such as distortion, barbs, jumping and the like, and the requirement is more outstanding after the popularization of new energy automobiles. After the automobile front cover outer plate is formed by stamping, the outer plate is subjected to partial deformation due to internal stress release, welding, coating and final assembly, especially the air window area is easy to generate trace deformation, the shape of the area is close to a plane, the area is gentle and the curvature radius is large, and the deformation after stamping can directly lead to distortion of an external sightseeing image. The traditional solution is mostly optimized through die debugging and grinding at the physical stage, but the stamping die is manufactured, is difficult to change greatly, is time-consuming and large in manpower and material resource investment, and cannot completely solve the problem. Disclosure of Invention In view of the above problems, the embodiment of the invention provides a design method of a front hood of a vehicle and the vehicle, so as to solve the problem that in the prior art, the curvature radius of a wind window area of the front hood is large, and after stamping deformation, an external sightseeing shadow is distorted. According to one aspect of the embodiment of the invention, the design method of the front hood of the vehicle comprises the steps of obtaining a front hood initial model, dividing a wind window area at the rear side part of the front hood initial model, moving the rear edge of the front hood initial model along the negative direction of a Z direction to obtain a front hood adjusted model, judging whether the curvature radius of the wind window area of the front hood adjusted model meets the requirement, judging whether the light and shadow test of the front hood adjusted model meets the requirement, and if the curvature radius of the wind window area of the front hood adjusted model meets the requirement and the light and shadow test of the wind window area of the front hood adjusted model meets the requirement, obtaining a front hood corrected model. Based on the steps, in the process design stage, the profile of the wind window area is moved negatively through the Z axis, the curvature radius is reduced, the section moment of inertia is improved, the rigidity is enhanced, the deformation is restrained, further the light shadow distortion is eliminated, the deformation caused by insufficient rigidity of the wind window area is solved, the rigidity is ensured to be improved to reach the standard through curvature radius verification, mechanical guarantee is provided for the light shadow effect, the appearance effect is directly verified through the light shadow test, and the situation that the rigidity reaches the standard but the light shadow is still defective is avoided. In an alternative embodiment, the wind window area comprises equidistant sections and variable-distance sections positioned on two sides of the equidistant sections, the equidistant sections are arranged between the front edge of the equidistant sections and the rear edge of the front hood initial model at equal intervals, the distance from the front edge of the variable-distance sections to the rear edge of the front hood initial model is gradually reduced in the direction from the middle to the side of the front hood, the rear edge of the front hood initial model corresponds to the part of the wind window area, the rear edge of the front hood initial model is moved in the negative direction along the Z direction, and the front hood adjustment rear model comprises the steps of moving the rear edge of the front hood initial model to the equidistant sections in the negative direction along the Z direction by a first preset distance, and the distance from the rear edge of the front hood initial model to the variable-distance sections is gradually reduced from the first preset distance to 0 in the direction from the middle to the side of the front hood. In an alternative embodiment, the first preset distance is in the range of 0.1mm to 0.3 mm. In an alternative embodiment, the dividing the wind window area at the rear side of the front hood initial model further comprises that the juncture of the equidistant section and the variable-pitch section corresponds to a convex portion of the front hood. In an alternative embodiment, dividing the louver region at the rear side of the front hood initial model further includes the width of the pitch segment being 0 at the