Development of a warm cross wedge rolling process using FEA and downsized experimental trials
Development of a warm cross wedge rolling process using FEA and downsized experimental trials
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DOI：
10.1007/s11740-012-0379-5
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发表时间：
2012-09-01
影响因子：
1.7
通讯作者：
Behrens, Bernd-Arno
中科院分区：
文献类型：
--
作者：
Kache, Hanns;Stonis, Malte;Behrens, Bernd-Arno
楔横轧是一种成形技术，具有很多优点：不会产生飞边，周期短，不需要润滑剂，机器易于自动化。目前，楔横轧仅在高温下应用。将该技术应用于高温（约500-950摄氏度）可以增加温锻件的几何范围。与热锻零件相比，温锻零件的优点是公差更小、表面粗糙度更低、无氧化皮和脱碳减少。为了在温暖的温度下进行楔横轧，必须分析缺陷的可能性，例如内部空隙和不适当的成形工件。本文介绍了一种一次压下的温楔横轧工艺的开发。本文还包括有限元分析（FEA）的结果，实验测试与缩小工件和适应的工业工件在原来的大小。在FEA模拟中，使用了侧面带有锯齿的工具。对缩小尺寸的方法进行了说明，并介绍了有限元分析、缩小尺寸和原始尺寸工件之间的差异，重点是成形力、温度分布和缺陷。
Cross wedge rolling is a forming technology that offers a lot of advantages: No flash occurs, cycle times are low, lubricants are not necessary and the machines are easy to automate. Currently, cross wedge rolling is applied at hot temperatures only. An adaption of this technology to warm temperatures (about 500-950 degrees C) can increase the geometrical spectrum of warm forgings. The advantages of warm forged parts in comparison to hot forged parts are closer tolerances, reduced surface roughness, no scale and reduced decarburization. To apply cross wedge rolling at warm temperatures, the possibilities of defects e.g. internal voids and improper formed work pieces must be analysed. This paper describes the development of a warm cross wedge rolling process with one area reduction. The paper also includes results of finite element analysis (FEA), experimental trials with a downsized work piece and the adaption to the industrial work piece in original size. In the FEA simulations tools with serrations on the side have been used. The downsizing method is explained and the difference between FEA, downsized and originally sized work piece with the focus on forming forces, temperature distribution and defects are presented.