Method of manufacturing energy absorption device
An energy-absorbing device and a manufacturing method technology, applied in the field of manufacturing safety protection devices, to achieve good energy-absorbing effect, stable deformation mode, and long effective stroke
Inactive Publication Date: 2015-04-08
HUNAN UNIV
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Problems solved by technology
[0003] The technical problem to be solved by the present invention is to overcome the deficiencies of the above-mentioned prior art, adopt a new energy-absorbing method, and provide an energy-absorbing device that adapts to various complex working conditions, has stable deformation modes, uniform energy absorption, and high efficiency
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[0033] The inner diameter D1 of the pre-tearing circular tube 1 is 40mm, the wall thickness h1 is 3mm, the length L1 is 90mm, the cone angle α is 20°, the outer diameter D2 of the guide friction circular tube 2 is 22mm, and the wall thickness h2 is 2mm, Length L2=L1+0.4×D1=106mm, the outer diameter of the punch 3 D3=D1×(1+λ)=60mm, where λ is the pre-expansion percentage, the value is 50%, the cone angle β is 17°, and the inner The hole diameter d1=D2=22mm, the outer diameter of the shoulder D4=D3+10=70mm, the matching size of the punch 3 and the guide friction tube in the initial state p=(L2-L1)×112.5%=18mm.
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The invention discloses a method of manufacturing an energy absorption device, and aims to manufacture a device which is simple in structure and capable of stably, effectively and uniformly absorbing energy in case of impact collisions such as a traffic accident. The energy absorption device comprises a pre-tearing circular tube (1), a guiding friction circular tube (2) and a plunger chip (3). Energy absorption of the energy absorption device mainly relies on bulging caused by the fact that the plunger chip (3) is extruded into the pre-tearing circular tube (1) and follow-up tearing of the circular tube. Compared with a traditional method of energy absorption, the tearing, curling and damage of the circular tube are more effective than crushing, axial buckling or rolling-over, and the energy absorption device has the advantages of long effective travel and stable impact force.
Description
technical field [0001] The invention relates to a manufacturing method of a safety protection device, in particular to a manufacturing method of a uniform buffer energy-absorbing device. Background technique [0002] A good buffer energy-absorbing device requires that the kinetic energy of the collision be as irreversible as deformation energy. Thin-walled metal pipes are often used to make energy absorbing devices due to their good energy absorption characteristics. Therefore, when designing energy-absorbing devices, thin-walled metal components should be considered first in the selection of materials, relying on these components to undergo plastic deformation to absorb energy when they are impacted, and produce a certain crushing stroke to absorb vehicle kinetic energy and reduce collision acceleration. The widely used energy absorbers at the present stage are mainly tubular energy absorbers made of thin-walled metals, which mainly use the axial buckling and folding defor...
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IPC IPC(8): F16F7/00F16F7/08
Inventor 李光耀谭坚孙光永唐春红
Owner HUNAN UNIV
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