Study On The Intelligent Equipment Of Car Crashes Using Thread Cutting

The car crash’s energy absorbing equipment is the most important component for safety, during the process of a car crashing, which plays a role as the last safe gate. Furthermore, the intelligent energy absorbing equipment is with much more significant. Metal bruise deformation is now used widely in energy absorbing equipment, but its capacity of energy absorbing can’t adjust freely. Once happening crash accident, it would bring plastic deformation head of the cars, even the worthlessness of the whole car. Not only it puts passengers to die, but also brings great economic damage. According to that, in this paper the author designs a new type of energy absorbing equipment which is based on metal-cutting and gets the impacting leader flexing freely, and develop to the researches as following:Firstly, the author makes a summary of the present research situation domestic and foreign, discussing faults of the present energy absorbing principle. And make a conclusion that, it is urgent and important to develop a new principle of car crash energy absorbing. Later, introduce the designing idea of energy absorbing equipment, including the origin intention, structure configuration, operating principle. Put forward a working scheme which the main purpose is carrying out flexing freely. As the research developing, the author finds faults and evaluates the scheme in time. Finally, the author finds a more applicable scheme.Through analyzing the mechanical properties of metal cutting and flying cut, the author finds some similarities and differences. And bring forward a mechanical formula of metal-cutting energy absorbing equipment by simulating.Through simulating and analyzing series of thread pipes with different pitch, the author concludes single-start thread is not fit for high-speed car crashing. Then analyzing thread pipes with three types of materials and the same parameters, the author concludes that double thread is more suitable to the energy absorbing equipment for high-speed car crashing due to its significant capacity and mechanical properties. Pass the whole car-crash simulating analysis of 50km/h and 56km/m. The results from the research suggest that it is efficient for insuring car crashing at high-speed based on impacting leader cutting the thread pipe.