The invention discloses a vehicular longitudinal metal energy absorbing box with variable wall thickness and a preparation method of the longitudinal metal energy absorbing box with variable wall thickness, and belongs to the technical field of metal products. The vehicular longitudinal metal energy absorbing box with variable wall thickness is characterized in that the wall thickness of an energy absorbing box is at least composed of a thickness transition zone, or composed of at least one equal thickness zone and at least one thickness transition zone. The thickness transition zone can be in the forms of linear, curve, folding or multi-sectional curve. The cross section of the variable wall thickness energy absorbing box can be circle, ellipse or polygon and other forms. The preparation method comprises the following steps: rolling a variable thickness plate according to the thickness requirement thereof, and cutting off to form a blank; cold-bending the blank, and welding it to be the variable wall thickness energy absorbing box as required. Compared with the energy absorbing box with equal thick belt inducing slot, the energy absorbing box with variable wall thickness has the advantages of optimizing collision performance, lightening weight, and reducing cost, and so on.
Vehicular longitudinal metal energy absorbing box with variable wall thickness and preparation method thereof
2015-06-10
Patent
Electronic Resource
English
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