forming process planning and technology realization of the monoblock break beam frame

In order to meet the performance demands of train lorry, a die forgingdrawing method based on structure features analysis was proposed to form the LA break beam frame. The finite element method was used to simulate a series of dieforging processes and the drawing processes with different parameters. The optimum crosssection shape of the performing die was obtained from these simulation results. It is found that local backflow of the metal is the primary cause of necking defects in drawing. Furthermore, the best drawing speed is determined to be from 87 mm/s to 96 mm/s. The results of trial manufacturing and product detection indicate that employing a die forgingdrawing process to form the monobloc break beam frame is feasible.

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