Cross wedge rolling and bi-directional forging of preforms for crankshafts
Cross wedge rolling and bi-directional forging of preforms for crankshafts
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DOI：
10.1007/s11740-014-0581-8
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发表时间：
2015-02
期刊：
影响因子：
--
通讯作者：
M. Meyer;M. Stonis;B. Behrens
中科院分区：
文献类型：
--
作者：
M. Meyer;M. Stonis;B. Behrens
预成形是无飞边锻造工艺中必不可少的一步。本文介绍了一种带销和法兰的双缸曲轴闭式锻造四阶段工艺链的开发。该工艺包括楔横轧、侧向挤压、双向锻造和最终成形，其中楔横轧是关键步骤。有限元分析（FEA）与软件Forge 3和实验测试执行不同的工艺参数，如坯料和工具温度，轧制速度和钢。为了减少工艺步骤，如横向挤压，楔横轧和双向锻造的直接组合进行了分析与有限元分析软件锻造3为一个气缸曲轴没有销和法兰。选择单缸曲轴是为了减少开发工作量。有限元分析结果给出了适合楔横轧的成形角α和改进双向工具的几个几何参数。
Preforming is an essential step in flashless forging processes. This paper describes the development of a four stage process chain for flashless forging of a two cylinder crankshaft with pin and flange. The process consists of cross wedge rolling, lateral extrusion, bi-directional forging and final forming, with cross wedge rolling being the essential step. The finite-element-analysis (FEA) performed with the software Forge 3 and experimental tests are executed with different process parameters, like billet and tool temperature, rolling velocity and steel. To reduce process steps, like lateral extrusion, a direct combination of cross wedge rolling and bi-directional forging is analysed with FEA-software Forge 3 for a one cylinder crankshaft without pin and flange. The one cylinder crankshaft is selected to reduce development effort. The results of the FEA give suitable forming angles α for cross wedge rolling and several geometric parameters for a modification of the bi-directional tool.