Identification of the mechanisms of action of the tribological behaviour of structured semi-finished product surfaces during full forward extrusion of aluminum alloys with regard to friction and wear reduction (TriboLub)

确定铝合金完全正向挤压过程中结构化半成品表面摩擦学行为的作用机制，以减少摩擦和磨损 (TriboLub)

• 批准号: 460819047
• 负责人: Professor Dr.-Ing. Thomas Bergs
• 金额: --
• 依托单位: Werkzeugmaschinenlabor - WZL
• 依托单位国家: 德国
• 项目类别: Research Grants
• 资助国家: 德国
• 项目状态: 未结题
• 来源: https://gepris.dfg.de/gepris/projekt/460819047?language=en
• 关键词: Identification; mechanisms; action; tribological; behaviour

Due to its high material efficiency, cold forming offers a particularly energy- and resource-efficient production method for near-net-shape components in large quantities. However, the high tribological loads during forming lead to wear on the tools. In order to reduce tool wear, workpieces’ surfaces are often structured by shot peening or electrochemical etching. The structures act as lubricant pockets when lubricant is used. Their geometry influences the contact mechanics in the effective joint by hydrostatic and hydrodynamic effects. These effects can lead to a local improvement in friction and wear. The effects of lubricant pockets on the tribological system as a function of their geometries have not been sufficiently researched according to the current state of the art in the field of full forward extrusion of aluminum alloys. The challenge is consequently to design lubricant pockets produced by shot peening and electrochemical etching in such a way that friction and wear are reduced. Therefore, the aim of this project is to identify the mechanisms of action of the workpiece structuring on the tribological system. The project is based on the hypothesis that the analysis of the tribological system influenced by lubricant pockets provides information about the existing hydromechanical and contact mechanisms through the quantification of friction and wear. To conduct the project, a combined approach of numerical and experimental investigations is planned to investigate the suitability of different shot peening media and their combinations with electrochemical etching for workpiece structuring for full forward extrusion of aluminum.

由于材料效率高，冷成形为大批量近净形部件提供了一种特别节能和资源高效的生产方法。然而，成形过程中的高摩擦载荷导致工具磨损。为了减少刀具磨损，工件表面通常通过喷丸或电化学蚀刻进行结构化处理。当使用润滑剂时，该结构充当润滑剂袋。它们的几何形状通过流体静力学和流体动力学效应影响有效接头中的接触力学。这些效果可以导致摩擦和磨损的局部改善。根据铝合金全正挤压领域的现有技术，润滑剂凹坑对摩擦学系统的影响作为其几何形状的函数还没有得到充分的研究。因此，挑战在于设计通过喷丸和电化学蚀刻产生的润滑剂袋，以减少摩擦和磨损。因此，该项目的目的是确定工件结构对摩擦学系统的作用机制。该项目是基于这样的假设，即通过对摩擦和磨损的量化，对受润滑剂袋影响的摩擦学系统的分析提供了有关现有流体力学和接触机制的信息。为了进行该项目，计划采用数值和实验研究相结合的方法来研究不同喷丸介质的适用性及其与电化学蚀刻的组合，用于铝的完全正向挤压的工件结构。