The research of the BHF control is an important content during the sheet metal forming process.
力的控制研究是板料冲压成型过程中的一个重要内容。
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。
Based on the prerequisite of no cracking, the fit constant BHF was acquired from reasonable blankholder gap control.
基于不破裂前提，从合理压边间隙控制中获得常压边力控制所需的恒定压边力。
It is showed that the limit drawing height could be greatly improved as a variable BHF deep-drawing process was adapted.
结果表明，变压边力拉深工艺能够极大提高板料的极限拉深高度。
The BHF can be reasonably changed with the wrinkling law by control system, so the flange formability and the part quality can be imp…
拉深过程中压边力通过控制系统可以随拉深起皱规律而合理变化，有效地改善法兰区变形的不均匀性，提高盒形件的成形质量。
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 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 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。
As we spend 60% of our day in the workplace, the BHF is encouraging employers to make them healthier places for their staff through our 'Think Fit' programme.
既然我们每天60%的时间在工作场所，英国心脏基金会鼓励雇主们通过“ThinkFit ”项目，为了他们的员工，把工作场所打造成更健康的地方。
The operation speed of BHF production line is stepless computer-controlled to realize the stable operation speed and simple operation of the production line.
BHF型生产线工作速度采用电脑控制无级调速，使该生产线运行速度稳定，操作简单。
According to diffuse instability criterion, worked out the principle of verdicting the case of base fracture or side fracture and formulae of fracture limit BHF;
按照分散性失稳准则，推导出产生壁裂和底裂的判别条件和方盒形件成形过程中的极限压边力公式；
The British Heart Foundation (BHF) said patients prescribed the supplements should keep taking their medication, but should also speak to their doctor if they were concerned.
英国心脏协会(BHF)说，患者开到补充剂时，仍需保持服用药物，但如果碰到这种情况，必需告诉医生。
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。
Impact factors of deep drawing LDR are analyzed. parameter BHF which can not be looked down upon is pointed out. Method of rebuilding single press machine for improving LDR is proposed.
分析了影响板料拉深成形极限拉伸系数的因素，指出压边力参数对LDR具有不可忽视的影响，并给出了改造单动液压拉深压边力控制系统提高LDR的方法。
The experiment results show that some different kinds of curves of BHF can be obtained and the types of BHF curve are influenced by some factors of hydraulic press and regulation device.
实验结果表明，通过调节机构可以获得多种不同形式的压边力变化曲线，曲线的形式受液压机以及调节机构中的多种因数影响。
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。
Prof Peter Weissberg, medical director of the BHF, said: "This study tells us that genes are very important but no matter what genes you have, you still need to pay attention to your lifestyle."
皮特教授，BHF部门的医学主管，说这个研究告诉我们基因是非常重要的，但是同时告诫大家，无论你是什么基因，你依然要注意自己的生活方式。
The results of the analysis show that the performance of the stamping forming is absolute difference for different modes of BHF, appropriate BHF can improve the forming performance of sheet metal.
分析结果表明，对于不同的压边力模式，拉深成形性能完全不同，合理的压边力能改善板材的成形性能。
The results of the analysis show that the performance of the stamping forming is absolute difference for different modes of BHF, appropriate BHF can improve the forming performance of sheet metal.
分析结果表明，对于不同的压边力模式，拉深成形性能完全不同，合理的压边力能改善板材的成形性能。
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