Analysis of process forces and geometrical correlations for open-die forging with superimposed manipulator displacements
Analysis of process forces and geometrical correlations for open-die forging with superimposed manipulator displacements
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叠加机械手位移的开模锻造的工艺力和几何相关性分析
DOI：
10.1016/j.jmatprotec.2019.116408
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发表时间：
2020
影响因子：
6.3
通讯作者：
Rudolph
中科院分区：
文献类型：
--
作者：
Wolfgarten;Rudolph
在开式模锻中生产弯曲形状的零件需要额外的制造步骤，复杂的工具设置或大量的加工。通过锻造过程中的应力叠加，实现复杂工件的工艺一体化生产是一种新的方法。在这里，锻造机械手被用来主动控制材料流向预期的最终几何形状。研究的目的是分析锻造过程中弯曲力和相关的工艺参数和产生的几何形状。在介绍了该工艺后，提出并验证了一个半经验模型，该模型允许根据工艺参数计算弯曲力。除弯曲力外，还进一步分析了工件的几何形状，提出了物料流动模型，并通过实验和数值模拟进行了验证。基于这些经过验证的弯曲力和几何模型，将工艺概念转换为具有非恒定弯曲半径的缩放工业几何。数值和实验研究都证明，该概念可以用于增加几何形状的范围，因为所提出的模型、数值模拟和实验验证之间的弯曲力和所得几何形状只有很小的偏差。结果表明，该模型可用于实现弯曲件的锻弯结合加工工艺设计，以实现复杂工件的近净形锻造。
The production of curved shaped parts in open-die forging requires additional manufacturing steps, complex tool setups or a high amount of machining. A new approach realizes the process-integrated production of complex workpieces through the superposition of stresses during forging. Here, the forging manipulator is used to actively control the material flow towards the intended final geometry. The investigations aim at an analysis of the forging process regarding bending forces and the correlation of process parameters and the resulting geometry. Following an introduction of the process, a semi-empiric model is proposed and validated, which allows to calculate the bending force depending on the process parameters.Besides the bending forces, the workpiece geometry is further analyzed and a model for the material flow is proposed and validated by experiment and numerical simulation.Based upon these validated models for bending force and geometry, the process concept is transferred to a scaled industrial geometry with non-constant bending radii. Both numerical and experimental investigations prove that the concept can be used to increase the range of geometries, since the bending forces and the resulting geometries only small deviations between the proposed models, numerical simulation and experimental validation were observed.Altogether, the results indicate that the models can be applied to realize a process design for the production of curved workpieces by combined forging and bending to realize the near net shape forging of complex workpieces.
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DOI：
--
发表时间：
1984
期刊：
影响因子：
--
作者：
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通讯作者：
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DOI：
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2015
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作者：
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发表时间：
2008
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