Fundamental analysis of surface finishing using flexible foams coated with diamonds

使用涂有金刚石的软质泡沫进行表面精加工的基础分析

• 批准号: 423137098
• 负责人: Professor Dr.-Ing. Dirk Biermann
• 金额: --
• 依托单位: Institut für Spanende Fertigung
• 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/423137098?language=en
• 关键词: Fundamental; analysis; surface; finishing; using

Surfaces with defined functional properties are used in various industrial applications. In production engineering, a reduction of friction and a control of the material flow are often desired functional properties. In this respect, deterministic surface structures on forming tools and chip guiding geometries on cemented carbide tools are typical examples. Due to the production process using geometrically defined cutting tools, filigree and complex form elements, which determine the properties of the surface, are often overlaid by an increased roughness. As a result the potential of the filigree structures cannot be fully realised. In order to reduce roughness, processes with geometrically undefined cutting edges are generally suitable for a post-treatment of the surface. However, the shape of the filigree structures does not have to be affected negatively.Soft foams that are coated with diamonds represent a novel and very flexible tool concept for this application. In addition to a high pore volume, they are characterized by a high softness leading to a promising adaptability especially for complex structures. The aim of this project is to qualify diamond coated foams for the post-treatment of filigree and complex surface structures without affecting their shape. In order to allow a targeted use, there is the need for fundamental, comprehensive academic analysis of the process behaviour, which is the subject of the project described. The analysis of the macroscopic and mesoscopic deformation behaviour of the flexible foams is of high interest, because a homogenous contact situation is of crucial importance for a uniform surface preparation. In this respect, the experiments also focus the influence of the surface pressure and the number of the active diamond grains on the surface topography. Moreover, to use the diamond-coated foams on a machine tool, an analysis of the crucial process parameters on the surface quality is required. This is necessary to define appropriate process parameters in order to achieve an adequate surface quality. Additionally, relevant influences on the surface quality as the interactions of the tool and the surface of the workpiece, the material separation mechanisms and the wear have to be considered as well. With regard to this, the wear forms as well as the wear-induced influences on the created surface topography are analysed. By taking into account all the relevant aspects of the application behaviour described, the targeted use of diamond-coated foams for surface finishing of filigree structures is to be achieved at the end of this project.

具有定义功能特性的表面在各种工业应用中使用。在生产工程中，摩擦的减少和材料流的控制通常是所需的功能特性。在这方面，在胶结碳化物工具上形成工具和芯片引导几何形状的确定性表面结构是典型的例子。由于使用几何定义的切削工具的生产过程，因此确定表面特性的花丝和复杂形式元素通常被粗糙度增加而覆盖。结果，无法完全实现花丝结构的潜力。为了降低粗糙度，几何不确定的切割边缘的过程通常适合表面处理后。但是，花丝结构的形状不必受到负面影响。涂有钻石的泡沫代表了该应用的一种新颖且非常灵活的工具概念。除了高孔体积外，它们的特征还具有高柔软性，可导致有希望的适应性，尤其是对于复杂的结构。该项目的目的是使钻石涂层的泡沫有资格在不影响其形状的情况下进行丝丝和复杂的表面结构进行处理。为了允许有针对性的用法，需要对过程行为进行基本，全面的学术分析，这是所描述的项目的主题。柔性泡沫的宏观和介观变形行为的分析具有很高的关注，因为同质接触情况对于均匀的表面制备至关重要。在这方面，实验还集中了表面压力的影响以及活性钻石晶粒对表面形貌的影响。此外，要在机床上使用钻石涂层的泡沫，需要对表面质量的关键过程参数进行分析。这是定义适当的过程参数以达到足够的表面质量的必要条件。此外，还必须考虑对工具和工件表面的相互作用，材料分离机制和磨损的相关影响。关于这一点，分析了磨损形式以及磨损引起的对创建表面形貌的影响。通过考虑描述的应用行为的所有相关方面，可以在该项目结束时实现钻石涂层泡沫用于表面饰面的泡沫。