CAR BUMPER AND METHOD OF ITS STRAIN HYSTERESIS ELEMENT FABRICATION Russian patent published in 2015 - IPC B60R19/18 

FIELD: transport.

SUBSTANCE: invention relates to motor car production, particularly to devices that up the car passive safety. Beam of the vehicle structural frame is used as bumper-beam of box-like cross-section. Said bumper-beam is arranged inside case-beam also of box-like cross-section. Stack of multiplayer continuous corrugated stacks is fitted in the gap there between with interferences over crimp tops composed of steel coppered bands "crimp-in-crimp" with steel coppered bands-strips laid there between. Stacks of corrugated bands rest on smooth band-strip laid there between with tops located on each other. Beam of aluminium bent section with channel-shape cross-section. Said corrugated stacks are assembled of cold-worked, ground of unfinished, coppered bands made of spring or high-carbon steels. Bands-strips are made of cold-worked unfinished coppered bands of the same steels or structural steels. Corrugated stacks are made by the process including cutting of bands and bands-strips, cold plastic deformation and fitting of fuller board on both sides of said stacks. Said stacks are corrugated by drawing through two gears with high pitch. After coppering of corrugated bands and bands-strips stacks are assembled to fit bands-straps in there between.

EFFECT: better energy absorption.

9 cl, 9 dwg