The numerical simulation result indicates that the variable blank-holder force can improve the formability of box deep drawing.
模拟结果表明，变压边力控制技术可以显著地改善矩形件的成形性能，增加矩形件的拉深极限。
The composition of rectangular box deep drawing system of divided variable blank holder force (VBHF) was discussed, its principle and work process of each portion were analyzed.
介绍了分区变压边力矩形件成形系统的组成以及各部分的原理结构，分析了各部分的工作过程。
Using variable blank holder force can remarkably improve the forming performance, and the limiting drawing ratio would reach 5.0.
采用变压边力可以明显提高板材的冲压性能，极限拉深比将达到5.0。
The simulated thickness with separation force is smaller than that with blank-holder gap because the BHF is variable in the flange region.
采用分离力时的模拟厚度比压边间隙小是由于法兰区域的变压边力。
The equipment has simple structure, is economical and practical and with variable blank holder force. High-quality complex sheet parts can be produced with this equipment.
该装备具有结构简单、经济实用、可实现变压边力控制等特点，可获得高质量的复杂板料成形件。
The equipment has simple structure, is economical and practical and with variable blank holder force. High-quality complex sheet parts can be produced with this equipment.
该装备具有结构简单、经济实用、可实现变压边力控制等特点，可获得高质量的复杂板料成形件。
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