Process combination of lateral extrusion and shear forming with straight tool motion to manufacture crankshaft-like components

将横向挤压和剪切成型与直线工具运动相结合的工艺组合来制造曲轴类部件

• 批准号: 276963522
• 负责人: Professor Dr.-Ing. Mathias Liewald
• 金额: --
• 依托单位: Institut für Umformtechnik (IFU)
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2015
• 资助国家: 德国
• 起止时间: 2014-12-31 至 2017-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/276963522?language=en
• 关键词: Process; combination; lateral; extrusion; shear

Shear forming processes are not very common in the area of cold forging, due to the fact, that conventional component geometries produced by cold forging show a a rotationally symmetrical shape. Within this project, therefore, a novel shear forming processes should be developed to produce crankshaft-like components by a combination of cold lateral extrusion and shear forming. In contrast to the conventional process combination of shear forming and upsetting there is only a small deformation zone at the transition area of shaft extension and flange. In this area a compressive stress is superimposed and both the process forces and the occurring stresses are reduced. This additionally causes a lower edge rounding at the flange area. To investigate the impacts of several process parameters a simple and modular tool is suggested and should be designed and manufactured within this project. Such process parameters are for example the amount of lateral displacement or the displacement velocity respectively the counter pressure. The main project aim is to provide a basic and scientific knowledge for the combined forming process of lateral extrusion and shear forming with a straight tool motion.

由于以下事实，在冷锻造区域中，剪切形成过程并不是很常见的，冷锻造产生的常规组分几何形状显示出一种旋转对称的形状。因此，在该项目中，应开发出一种新型的剪切形成过程，以通过冷侧挤出和剪切形成结合使用曲轴样组件。与剪切形成和破坏的常规过程组合相反，轴延伸和法兰的过渡区域只有一个小的变形区。在该区域，压缩应力是叠加的，并且过程力和发生的应力都会减少。此外，这会在法兰区域引起下边缘舍入。为了研究多个过程参数的影响，建议了一个简单的模块化工具，应在该项目中设计和制造。这样的过程参数是例如，侧向位移的量或位移速度分别为反向压力。主要项目的目的是为横向挤出和剪切形成的组合形成过程提供基本和科学的知识，并具有直接的工具运动。

项目成果

Development of a novel cold forging process to manufacture eccentric shafts

开发制造偏心轴的新型冷锻工艺

• DOI: 10.1063/1.5035018
• 发表时间: 2018
• 作者: Pasler;Liewald
• 通讯作者: Liewald