To reduce the forming force, techniques that are improving the formability of coining with micro-feature were studied.
并以有效降低成形力为目标，研究探讨提高微细特征成形性的工艺措施。
The equations for forming force of flow-controlled forming, the criterion for control chamber position and the design methods for shape and dimension design are presented.
提出了流动控制成形力的计算公式、控制腔位置的判断准则及其形状和尺寸的设计方法。
A technology to form copper long-branch tee pipe directly in compound forming of bulging and extrusion is developed, the formula and calculation of the forming force are introduced.
对紫铜长支管T型管复合胀形工艺进行了试验研究，介绍了包括冲头挤压力的公式与计算，试验中所用复合胀形模具结构和部分重要零件的设计与选取及试验结果。
This paper mainly introduces structure and prinicipe of mouth bulging die for diffusion tube, calculation method of blank size and forming force, design technology of main work parts.
主要介绍扩散管胀口模具的结构与工作原理、毛坯尺寸及胀口力计算方法和主要工作部件的设计技术。
The results show that the two schemes are right, but the scheme forming head shape in sequence can decrease the forming force significantly, the reason is that the material flow mode is changed.
结果表明，两种方案均能正确成形，但是顺序成形能显著降低成形力，其主要原因是金属的流动模式发生了变化。
Then the FEM simulation was applied to study the influence of friction factor and initial forging temperature on maximum forming force, which provided reference on finishing process for similar parts.
通过有限元模拟，进一步研究了整形温度、摩擦系数对最大载荷的影响规律，为此类零件的局部精整工艺制定提供了理论参考。
Forming force during backward extrusion of hollow billet was analyzed by slab method and numerical simulation.
采用主应力法与数值模拟相结合的方法，研究分析空心坯料反挤压成形力变化规律。
Forming force during backward extrusion of hollow billet was analyzed by slab method and numerical simulation.
采用主应力法与数值模拟相结合的方法，研究分析空心坯料反挤压成形力变化规律。
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