| 1. | Single blank holders and segmental blank holders were used
试验中采用了整体压边圈和分瓣压边圈。 |
| 2. | Uniform blank holder force and local holder force ( non - uniform ) were tried
对压边力的分布采用了均匀压边力和局部改变压边力。 |
| 3. | Expert system based on fuzzy neural network for the optimal control of blank holder force
神经网络简化模型设计多变量自适应模糊控制器 |
| 4. | 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和刚性直接控制法。 |
| 5. | At the same time , acquiring the formula of the minimum blank holder force that to be sure that the blank holder will not be lifted
同时，又得到了保证拉深零件时压边圈不被?起的最小压边力公式。 |
| 6. | The predominant failure mode in stamping of sheet metal parts are wrinkling and fracture , in general , these defects may be eliminated by appropriate manipulated the blank holder forces
摘要起皱和断裂是板料成形过程的主要失效模式，合理控制成形过程中压边力，可以消除这些缺陷，提高成形性能。 |
| 7. | The predictions have been compared with experiments and the results indicated that the adaptive variable blank holder force can be used to improve the sheet metal forming processes
本文通过数值模拟的方法把变压边力的压边方式应用到拉深过程，并和实际情况相比较，发现合理的变压边力能改善板材的成形性能。 |
| 8. | The springback angle increases with the increase of the punch round radius and clearances between the punch and the die while decreases with increase of the blank holder force , sheet thickness , friction coefficient and material hardening exponent
回弹角随凸模圆角半径和凸凹模间隙的增大而增大，随压边力、板料厚度、摩擦系数和材料硬化指数的增大而减小。 |
| 9. | The experimentation of the door outer ’ s viscous pressure forming under different blank holder pressures has been done . the strain distributions of the decorated rib and handle are obtained by the girding method and the thickness strain distributions are also obtained
通过网格分析法对试件关键部位(装饰筋和把手)的应变进行了分析,分析了粘性介质压力成形过程中成形试件的壁厚分布。 |
| 10. | In the paper , the finite element simulation software dynafrom is applied to analyze the affect of different blank holder during the forming process of laminose stepped tubular part , predict the possible defects such as wrinkle and break , obtain the rational style of blank holder avoiding the occur of defects and determine the rational configuration of die . the forming affect of thin - wall shallow stepped tubular part is analyzed when using different lubricate condition ( friction coefficient ) . by this method , the relationship between friction coefficient and drawing depth of laminose stepped tubular part is obtained
本文利用有限元模拟软件dynafrom分析了不同类型的压边圈对薄壁阶梯筒形件成形过程的影响规律，预测了采用不同类型压边圈时可能出现的成形缺陷如起皱和拉裂，获得了防止缺陷产生的合理压边圈形式，确定了合理的模具结构形式；分析了不同的润滑条件（摩擦系数）对薄板阶梯筒形件成形的影响，获得摩擦系数与薄板阶梯筒形件的拉深深度的关系；分析了阶梯筒形件成形过程中的不同阶段的应力应变分布、毛坯材料厚度变化情况，并获得了阶梯阶梯筒形件能一次拉深成形的条件。 |
