Process and tool development for micromilling of cemented carbides

考虑到部件和工具小型化领域的当前发展，硬质合金等高强度材料的微机械加工是一个很有前途的研究领域。到目前为止，对硬质合金零件加工的研究主要集中在PCD涂层刀具的宏观加工领域，但这并不允许传递微观加工的相互作用和切屑形成机制。对于硬质合金涂层硬质合金微型刀具(d≤1 mm)加工硬质合金材料的机理和工艺相关性的全面科学观察和分析完全不为人所知。刀刃形状的特殊设计可形成延展性切屑，可用于加工WC-Co材料。与替代工艺相比，高效表面系统的产生具有巨大的潜力。因此，该研究项目追求的最高科学目标是确定不同硬质相和粘结剂含量的硬质合金材料的微细加工的基本机理和相互关系，从而使这类材料的微细加工变得容易。为了实现这一目标，机械加工技术研究所(ISF，Biermann教授)和材料工程系主任(LWT，Tillmann教授)之间的跨学科研究方法将研究开发用于硬质合金加工和刀具侧的摩擦学适应的微型刀具的基础。

The micromachining of high-strength materials such as hard metals is a promising field of research, taking into account current developments in the field of miniaturization of components and tools. Up to now, first investigations on the machining of hard metal workpieces exist mainly in the field of macro-machining using PCD-coated tools, which, however, do not allow a transfer of the interactions and chip formation mechanisms for micro-machining. Comprehensive scientific observations and analyses of the mechanisms and process-relevant correlations to the tool design for the machining of hard metal materials by means of PVD-coated hard metal micro tools (d ≤ 1 mm) with nitridic or boridic hard material layers are completely unknown. The specific design of the cutting edge shape to produce a ductile chip formation enables the machining of WC-Co materials. In comparison to alternative processes, there is a great potential for the generation of efficient surface systems. Therefore, the research project pursues the superordinate scientific goal of identifying the basic mechanisms and interrelationships of micro-machining of hard metal materials with varying hard phase and binder content and thus making micromilling machining of this class of materials accessible. In order to achieve this goal, the interdisciplinary research approach between the Institute of Machining Technology (ISF, Prof. Biermann) and the Chair of Materials Engineering (LWT, Prof. Tillmann) will research the fundamentals for the development of tribological-adapted microtools for carbide cutting on the process and on the tool side.