Energy absorption device based on necking plastic deformation

Abstract

The invention discloses an energy absorption device based on necking plastic deformation. The energy absorption device comprises a mounting plate provided with mounting through holes. A necking concave die is arranged in each mounting through hole of the mounting plate. A necking through hole is formed in the middle of each necking concave die. A necking deformation pipe is embedded in each necking through hole in a cooperation manner. An impact convex die is inserted in the necking deformation pipes. One end of the impact convex die is located outside the large-diameter pipe ends of the necking deformation pipes, the other end of the impact convex die is in contact with a bottom plate arranged at the small-diameter pipe end of each necking deformation pipe, and the small-diameter pipe ends are inserted into the necking through holes of the necking concave dies. Each necking deformation pipe is a thin-wall metal pipe, and the strength of the necking deformation pipes is smaller than that of the impact convex die and that of the necking concave dies. The impact convex die can transmit impact force to the bottom plates of the necking deformation pipes, so that the necking deformation pipes are converted to be pulled from being pressed to generate stable plastic deformation so as to absorb energy. The energy absorption device further has the beneficial effects of being simple in structure, convenient to mount, capable of bearing stronger impact force, capable of avoiding transverse unstability and stable in deformation, saving cost and the like.

Description

technical field [0001] The invention relates to the technical field of rail vehicle passive safety, in particular to an energy-absorbing device based on necking plastic deformation. Background technique [0002] As the main artery of the national economy and a popular means of transportation, rail transit has the characteristics of large capacity, high speed, low cost, relatively high safety, environmental protection and energy saving. Rail transit has developed rapidly in recent years, especially high-speed passenger trains ushered in a booming period. As the operating speed continues to increase, the safety of vehicles is becoming more and more important. The probability of vehicle collisions is relatively small, but once a collision occurs, it will bring huge casualties and property losses. [0003] In order to reduce the harm caused by vehicle collision accidents and carry out passive safety protection of vehicles, it is necessary to study the special energy-absorbing s...

AI Technical Summary

Problems solved by technology

The other is the bulging / neck-type energy-absorbing structure. After the force-displacement curve increases sharply with the displacement, it will stabilize at about a platform force, which is much more stable than the impact force of the crushing-type energy-absorbing structure. , especially when the bulging / crushing tube is pre-deformed, but in the actual application process, there is a situation that the non-bulging / neck part is pre-collapsed, resulting in deformation instability

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