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
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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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