Process design in flashless forging of rib/web-shaped plane-strain components by the finite element method
Process design in flashless forging of rib/web-shaped plane-strain components by the finite element method
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DOI：
10.1016/0924-0136(95)85005-8
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发表时间：
1995
影响因子：
6.3
通讯作者：
B. Kang;Jae-Ho Lee;B. Kim;J. Choi
中科院分区：
文献类型：
--
作者：
B. Kang;Jae-Ho Lee;B. Kim;J. Choi
本文采用刚塑性有限元法设计了肋/腹板平面应变件锻造中的预成形操作，以获得无飞边的产品，用于分析和设计的肋几何形状的高宽比分别为1.0、2.0和3.0。在控制预成形坯形状和建立系统的工艺设计过程中，研究了无飞边几何填充和最终产品中有效应变均匀分布的两个设计准则。一个预成形操作被设计用于具有在1.0和2.0的比率下的有效应变的合理分布的无飞边锻造。比例为3.0的情况也需要一个预成型件来满足无飞边几何填充，但具有高有效应变，需要增加进一步的预成型操作以避免有效应变的高值：因此比例为3.0的情况被设计为两个预成型操作。将平面应变锻造的预成形结构与肋/腹板轴对称锻造的预成形结构进行了比较。应注意，平面应变肋/腹板部件的无飞边锻造需要独特的预成形操作，以使金属在中心部分流动较慢。
In this work preforming operations in the forging of rib/web-shaped plane-strain components are designed by the rigid-plastic finite element method to obtain flashless products, the height-to-width ratios of rib the geometry used for the analysis and design being 1.0, 2.0 and 3.0. The two design criteria of flashless geometrical filling and an even distribution of effective strain in the final products are investigated in controlling the preform configuration and establishing a systematic procedure of process design. One preforming operation is designed for flashless forging with a sound distribution of effective strains at ratios of 1.0 and 2.0. The case of a ratio of 3.0 also needs one preform to satisfy flashless geometrical filling, but has high effective strain, a further preforming operation needing to be added to avoid the high value of effective strain: thus the case of a ratio of 3.0 is designed as two preforming operations. The resulting preform configurations in plane-strain forging are compared with those of axisymmetric forging of rib/web components. It is noted that the flashless forging of plane-strain rib/web components requires a unique preforming operation to make the metal flow slower at the central part.