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Defect-resistant folding mark type energy absorption box

A technology for energy-absorbing boxes and defects, which is applied in the field of anti-defect crease-type energy-absorbing boxes, and can solve problems affecting energy absorption efficiency and other issues

Active Publication Date: 2016-10-12
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the diamond-shaped crease contains a relatively narrow and long sharp corner structure, this type of energy-absorbing box is more sensitive to defects. In the case of a relatively complex impact environment, even very small defects may affect this crease-type energy-absorbing box. Energy absorption efficiency of the energy box

Method used

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  • Defect-resistant folding mark type energy absorption box
  • Defect-resistant folding mark type energy absorption box
  • Defect-resistant folding mark type energy absorption box

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Example 1: figure 1 An embodiment of an octagonal cross-section anti-defect crash crash box.

[0019] The so-called octagonal cross-section anti-defect collision crash box 1 means that the cross-section 2 of 1 is octagonal. figure 2 It is a schematic diagram comparing the energy absorption efficiency of the original crease-type energy-absorbing box of the octagonal cross-section anti-defect collision energy-absorbing box under the condition of defects. It can be found in the figure that the energy-absorbing efficiency of the anti-defect impact energy-absorbing box is higher than that of the original crease The type crash box has a greater improvement, and it increases with the increase of the bottom edge of the double trapezoidal concave angle.

[0020] The octagonal cross-section anti-defect collision energy-absorbing box can be made with a suitable processing technology. Considering that the pipe wall of the present invention is a expandable structure, it can be ma...

Embodiment 2

[0021] Example 2: Figure 4 (a) An implementation of the hexagonal cross-section anti-defect crash crash box.

[0022] The so-called hexagonal cross-section anti-defect collision crash box means that the cross-section of the crash box 9 is hexagonal. Due to the expandable structure of the tube wall, the processing technology of the defect-resistant crash-absorbing box with hexagonal cross-section and octagonal cross-section is similar, except that the hexagonal shape can only be assembled and welded by one-third of the crash-absorbing box made. Similarly, the lengths of the units 10 along the axial direction can also be different, and the size and shape of the double trapezoidal units 3 in the units 10 can also be different.

Embodiment 3

[0023] Example 3: Figure 4 (b) is an embodiment of the anti-defect crash crash box with dodecagonal cross-section.

[0024]The so-called dodecagonal cross-section anti-defect collision crash box means that the cross-section of the crash box 11 is dodecagonal. Due to the expandable structure of the tube wall, the processing technology of the anti-defect collision crash box with dodecagonal cross-section and octagonal cross-section is also similar, except that the dodecagonal cross-section can be divided into one-half, one-third , or one-sixth of the energy-absorbing box is assembled and welded. Similarly, the lengths of the units 12 along the axial direction can also be different, and the size and shape of the double trapezoidal units 3 in the units 12 can also be different.

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Abstract

The invention relates to a defect-resistant folding mark type energy absorption box, which belongs to a defect-resistant collision energy absorption box for introducing improved folding mark veins into a thin-wall pipe fitting. The improved folding marks can guide the deformation mode of the thin-wall pipe fitting; high defect-resistant capability is also realized. Compared with an ordinary folding mark type thin-wall pipe, the defect-resistant folding mark type energy absorption box has the obvious characteristics that a diamond concave corner in the folding mark type energy absorption box is improved into a double-trapezoidal concave corner, so that the thin-wall pipe fitting capable of effectively resisting the defect can be formed. By introducing the improved folding mark veins, the requirements of high specific energy absorption rate and low peak load are enabled to be realized; meanwhile, the high defect-resistant capability is realized. In addition, the defect-resistant folding mark type energy absorption box has the advantages that the structure is simple, and the manufacturing cost is low.

Description

technical field [0001] The invention relates to the structural manufacturing technical field of automobiles, trains, airplanes and other means of transportation. It is designed for the safety structure design of various means of transportation in the event of collision or accident, and in particular relates to an absorbing Kinetic energy crash box device. Background technique [0002] At present, various types of vehicles, such as automobiles, trains, etc., are more prone to collisions and accidents due to the increasing speed of operation. The violent collisions in such accidents will cause unbearable losses to the lives and properties of the public. Installing specially designed energy-absorbing boxes in the parts of vehicles that are prone to contact is currently the main method for manufacturers to solve collision problems. For various energy absorption and dissipation methods, thin-walled structural metal tubes and various foam sandwich tubes derived from them are very...

Claims

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Application Information

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IPC IPC(8): B60R19/34B64D45/00
CPCB60R19/34B64D45/00
Inventor 王博周才华程耿东郝鹏张希
Owner DALIAN UNIV OF TECH
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