Investigating of the production of several eccentric, non-circular cross sections using cross wedge rolling

研究使用楔横轧生产几种偏心非圆形截面

• 批准号: 413630938
• 负责人: Dr.-Ing. Malte Stonis
• 金额: --
• 依托单位: Institut für Umformtechnik und Umformmaschinen (IFUM)
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2019
• 资助国家: 德国
• 起止时间: 2018-12-31 至 2022-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/413630938?language=en
• 关键词: Investigating; production; several; eccentric; non

The aim of the proposed research project is to study the possibilities of cross wedge rolling for the simultaneous production of several non-circular eccentric cross sections. In addition to the simultaneous generation of different cross sections the orientation of the formed sections is examined as well as the limits of the process, beyond which a cross-wedge rolling due to the transitions or expressions of eccentric elliptical cross sections is no longer possible.First, the production of elliptical cross sections is examined. By locally deforming the material only in radial orientation the cross section area remains constant. The maximum expression of the elliptical cross section, the ratio of the thinnest to thickest diameter, is part of the investigations. In addition to the maximum expression, the forming behavior of the part with several elliptical cross sections will be studied. Another main point of the investigations is the orientation of two elliptical sections to each other. Different orientation results in different force effects affecting on different positions of the component. In order to keep the process stable, the contact point for the different oriented sections needs to be considered.The second aim is to study the production of eccentric sections using cross wedge rolling. The eccentric steps are carried out with a circular shape. As well as within the elliptical investigations, the cross section area stays constant so that material is only formed radial. First, the maximum possible eccentricity is examined. As a further investigation, the orientation of two eccentric sections to each other is examined similar to the studies of the elliptical cross-section.The third aim is to study the combination of elliptical and eccentric sections. With the knowledge gained from the previous studies the possibilities of combining both processes in order to produce several sections with non-circular eccentric cross sections will be investigated.The investigations are carried out first using FEM to reduce tooling costs. Using the FEM results, a modular tool will be designed. With this tool, investigating different parameter combinations are possible.

该研究项目的目的是研究楔横轧同时生产多个非圆偏心截面的可能性。除了同时生成不同的横截面之外，还要检查成形截面的方向以及工艺的极限，超过该极限，由于偏心椭圆横截面的过渡或表达而不再可能进行楔横轧。首先，检查椭圆横截面的生产。通过仅在径向方向上使材料局部变形，横截面积保持恒定。椭圆形横截面的最大表达，最薄的直径与最厚的直径之比，是调查的一部分。除了最大表达式外，还将研究具有多个椭圆截面的零件的成形行为。研究的另一个要点是两个椭圆截面的相互定向。不同的方向导致不同的力效应影响不同的位置的组件。为了保证轧制过程的稳定性，需要考虑不同方向截面的接触点。第二个目的是研究楔横轧生产偏心截面。偏心步骤以圆形形状进行。以及在椭圆形调查中，横截面积保持恒定，使得材料仅径向形成。首先，检查最大可能的偏心率。作为进一步的研究，我们将研究两个偏心截面的相互定向，类似于椭圆截面的研究。第三个目的是研究椭圆截面和偏心截面的组合。利用以前研究中获得的知识，将研究将两种工艺结合起来生产几种非圆偏心截面的可能性。首先使用有限元法进行研究，以降低模具成本。使用有限元分析结果，将设计一个模块化的工具。使用此工具，可以研究不同的参数组合。