THE FEM SIMULATION OF DIESEL INJECTOR NOZZLE DRILLING

With the increasingly strict requirements for diesel engine emissions and the maturity of high-pressure common rail injection technology, the requirements for nozzles in the industry are also increasing. The quality of the nozzle hole has great influence on the performance of the diesel engine. Therefore, how to improve the quality of nozzle hole processing and improve production efficiency has become a problem to be solved. In this paper, based on the theory of high-speed metal micro-cutting, using digital design and computer simulation, the drilling of diesel engine injector nozzle holes is studied. The research contents include the chip formation mechanism and the characteristics of drilling process. The research objectives are as follows: based on the experiments of nozzle hole drilling, the relationship between drilling characteristics and drilling parameters in the process of nozzle hole drilling is studied; the formation process of nozzle hole chip is studied. In drilling simulations, 20CrMo is used as workpiece material and carbide micro-bit is used to process the nozzle holes. Third Wave Advantedge finite element simulation software is used in the simulation.