This narrow range of blank-holder force is difficult to determine.
合适的压边力范围是很难决定的。
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。
Hence, the blank-holder force must lie within a narrow range, above that necessary to suppress wrinkles on the one hand, and below that which produces fracture on the other.
因此，压边力必须控制在一定的范围内，一方面增抑制起皱，另一方面防止破裂。
Wrinkling and fracture are the major defects in sheet metal forming, and the blank-holder force(BHF) is an important technologic parameter controlling the forming of sheet metal.
在板材成形中，起皱和拉裂是主要缺陷，而压边力是控制板材成形的重要工艺参数。
The optimization of drawing technique was researched, and the influence of different blank holder force and minimum die fillet radius on stamping forming was studied as well.
对该零件成形工艺进行了优化，研究了不同的压边力、最小模具圆角半径对冲压成形的影响，通过对模拟结果的分析得出了空调前板的最优化成形方案。
Through the limiting drawing ratio tests, the influences of rolling, annealing, blank holder force, drawing gap, drawing temperature and speed on the forming performance were investigated.
通过极限拉伸比试验，研究了轧制、退火、拉伸温度、拉伸速度、拉延间隙以及压边力等工艺因素对镁合金板材成形性能的影响。
The result indicates that proper blank holder force and liquid pressure will help to reduce the occurrence of drawing defects and the application of hydroforming can get more uniform wall thickness.
研究结果表明，合适的压边力和液体压力能控制盒形件拉深缺陷的发生，采用液压拉深盒形件可获得更好的壁厚分布。
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 optimum blank-holder gap and separation force are determined through a systematic study.
通过一个系统的研究方案来确定一个优化的压边力和压边间隙。
Elastic rubber method and rigid blank holders were used to apply blank holder force with different methods.
对压边力的控制采用了弹性橡胶控制法和刚性直接控制法。
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。
The function of the blank holder force (BHF) as well as its influence on the forming performance and forming accuracy of combined stepped-hole were analyzed.
分析了压边力的作用及其大小对这种复合台阶孔成形性能和成形质量的影响。
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 latest achievements achieved in the intelligent deep-drawing process are summarized and the intelligent control architecture for blank holder force control is demonstrated in detail.
概述了拉深成形智能化的研究现状，详细叙述了压边力智能控制系统的架构。
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 function of the blank holder force (BHF) as well as its influence on the forming performance and forming accuracy of workpieces were analyzed.
分析了压边力的作用及其大小对成形性能和成形质量的影响，提出了适用于这种冲锻组合工艺的压边条件，并进行了工艺试验验证。
The function of the blank holder force (BHF) as well as its influence on the forming performance and forming accuracy of workpieces were analyzed.
分析了压边力的作用及其大小对成形性能和成形质量的影响，提出了适用于这种冲锻组合工艺的压边条件，并进行了工艺试验验证。
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