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An anti-collision structure with regular polygon and equal cross-section applied to the door sill of composite materials

A technology of regular polygons and composite materials, which is applied to superstructures, superstructure subassemblies, vehicle parts, etc., can solve problems such as vehicle thresholds that are not applicable to composite materials, and achieve avoidance of galvanic corrosion risks, reduction of intrusion, and reduction of welding The effect of tooling design

Active Publication Date: 2021-07-09
CHINA FIRST AUTOMOBILE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Taking composite car side panels and their associated composite car sills as an example, the original method of connecting segmented metal sill reinforcement plates by welding inside the metal car sill, due to the strength of parts, connection process and galvanic corrosion, etc. Reasons no longer apply to composite car sills

Method used

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  • An anti-collision structure with regular polygon and equal cross-section applied to the door sill of composite materials
  • An anti-collision structure with regular polygon and equal cross-section applied to the door sill of composite materials
  • An anti-collision structure with regular polygon and equal cross-section applied to the door sill of composite materials

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Effect test

Embodiment 1

[0031] figure 1 It is a schematic diagram of the assembly of the anti-collision structure 100 with a regular polygon and equal cross-section in the embodiment of the present invention and the composite material automobile door sill. Such as figure 1As shown, in this embodiment, the outer contour surface on the right side of the anti-collision structure 100 with a regular polygonal cross-section is bonded to the inner cavity surface of the composite material automobile door sill inner panel 200, and the two are bonded and fixed by a tough structural adhesive; then the regular polygon, etc. The outer contour surface on the left side of the cross-section anti-collision structure 100 is coated with tough structural glue, and bonded and fixed with the inner cavity surface of the outer panel of the composite material automobile door sill; A bonding gap of 0-1 mm is provided between the surfaces of the inner cavity, which is used as a coating space for the above-mentioned tough stru...

Embodiment 2

[0042] In this embodiment, the fiber-reinforced structural body 110 of the regular polygonal cross-section anti-collision structure 100 uses a circular three-dimensional fiber braiding machine to prepare the multi-dimensional fiber-reinforced preform in the regular polygonal cross-sectional fiber reinforced structural body 110, which The fiber weaving direction of the multi-dimensional fiber-reinforced preform is customized according to the required stress conditions, and then the multi-dimensional fiber-reinforced preform passes through the pultrusion process equipment under the traction device, and is cured with epoxy resin to form a regular polygon Constant cross-section fiber reinforced structural body 110 . Compared with the regular polygonal equal-section fiber-reinforced structure body 110 formed by laying carbon fibers along the length direction of the regular polygonal equal-section anti-collision structure in the first embodiment, it has a more complex mechanical load...

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Abstract

The invention relates to a regular polygon equal-section anti-collision structure applied to a composite material automobile door sill, which is characterized in that: it includes a body and an outer surface anti-impact layer; Equal proportions, and regular polygonal equal cross-section fiber reinforced structure outer profile section and the inner surface of the car door sill cavity are provided with a bonding gap of 0~1 mm, the bonding gap is filled with tough structural glue, the bonding thickness is 1mm, in regular polygons, etc. The cross-section fiber reinforced structure body is wound with fiber reinforced tape, and the impact-resistant layer on the outer surface is wound on the outside of the regular polygonal cross-section fiber reinforced structure body in two directions of +45° and -45°, and the number of winding layers is 1~3 layers; on the body The interior is provided with energy-absorbing fillers, and the energy-absorbing fillers are made of high-energy-absorbing-ratio foam profiles or filled with self-foaming hardened foam in the cavity. The external profile of the anti-collision structure with equal polygonal cross-section and the internal positioning of the car door sill are fixed by tough structural adhesive, which reduces the design of welding tools and is simple and convenient to operate.

Description

technical field [0001] The invention relates to an anti-collision structure with regular polygon and equal cross-section applied to the door sill of a composite material automobile, which adopts continuous fiber reinforced composite material and belongs to the technical field of anti-collision protection devices for automobiles. Background technique [0002] With the development of automobile technology, the requirements for passive safety of automobiles are gradually increasing. As one of the C-NCAP mandatory standard evaluations, the deformable mobile barrier with a speed of 50km / h and the side collision of the vehicle is the test and consideration of the structure and strength of the door sill in the passive safety of the car. It is related to whether the threshold of the car can absorb and disperse enough collision energy in the event of a collision, reduce the intrusion of the threshold, reduce the damage to the drivers and passengers, and protect the lives of the drive...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B62D29/04B62D25/20
CPCB62D25/20B62D29/043
Inventor 李晔杨兆国周宇飞江梅方程范喜龙
Owner CHINA FIRST AUTOMOBILE
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