Therefore it is necessary to study forming characteristic of conical part, to analyze various parameters'influence on its forming limit, and to define reasonable blank holding force(BHF).
圆锥形零件是曲面类零件中较为典型的零件，对其冲压成形过程的研究是进行曲面类零件研究的基础。
Therefore it is necessary to study forming characteristic of conical part, to analyze various parameters'influence on its forming limit, and to define reasonable blank holding force(BHF).
圆锥形零件是曲面类零件中较为典型的零件，对其冲压成形过程的研究是进行曲面类零件研究的基础。
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