The Designand Simulationg Of Cavity Pattern Cooling System Of Hot Stamping Mold In B Pillar

Weight reduction has been an important way of auto energy saving, high strengthsteel can greatly reduce the weight of the motor vehicle parts in the condition ofensuring the body strength. Hot stamping technology is an important method ofprocessing of high strength steel sheet which make the blank formed and quenched afterits austenitizing its stamping making use of the cooling system to produce martensite inorder to improve the strength of the blank. The cooling system determines the quality ofthe hot stamping as a key part of the hot forming technology, domestic and foreignenterprises and university have done a lot of research on it. Many research have focusedon B-pillar which work to prevent lateral impact and support the car roof and the floor.Three cooling structure of the cooling system of B-pillar "supporting pillar style,vertical trench style and vertical and horizontal trench style" and other working partsand related parameters are designed with the help of the basic knowledge of heattransfer. Establish3D model using CATIA software to design a model of the mold, andcheck the strength of the mold.Heat conduction as well as computational fluid dynamics involved in the processof cooling system is introduced and it lays a theoretical foundation for the simulation.Import CATIA model into CFX software, set the relevant parameters, simulate thecooling effect of the "supporting pillar and vertical trench style" to optimize thestructural parameters of the mold. Compare the cooling rate, the cooling uniformity,mold strength and ease of processing of the three structures to select the final optimizedstructure. The simulation results reveal the factors and laws of the cooling effect of thesheet.Do experiment using the simplified model and BR1500HS to study the relationshipbetween pressure, press time, flow velocity and the cooling effect of the sheet to verifythe validity of the numerical simulation.