The good velocity controllability of servo-dynamo can be used to realize variable blank holding force control through adjusting the force on sheet metal blank with a holding force adjusting equipment.
利用伺服电机良好的速度可控性，可以通过压边力调节装置调整作用在板坯上的压边力的大小，更容易实施变压边力控制。
A method of applying blank holding force is proposed.
提出了一种适用的压边力施加方法。
The strategy of variable blank holding force is an effective measure for the springback control in sheet metal forming processes.
变压边力策略是在冲压件成型中控制回弹的一种有效措施。
Different blank-holder gaps and separation forces are used to control the blank holding force (BHF).
压边力采用不同的压边间隙和施加不同的分离力来实现。
A new structure, with constant blank holding force provided by spring and rubber, is proposed.
提出了以弹簧或橡胶作为弹性元件压边，可提供常压边力的新结构。
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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