Analysis of interactions and effects of new preparation methods and resulting drill hole qualities in single lip deep hole drilling

单唇深孔钻削的特别特点是能够产生高质量的钻孔，因此无需后续的加工过程来提高质量。所得到的钻孔质量关键地基于钻孔内的切削部件及其引导元件的状况。当使用单刃深孔钻时，导向垫的表面质量不足以及刀具的渐进磨损，孔表面的外部区域会出现失效和谷。后续项目将有助于了解单刃深孔钻削过程中切削部分与孔表面之间的摩擦学相互作用。该项目的目标包括分析特定涂层前和涂层后处理与准备好的钻井工具性能的相互依赖性。因此，有针对性的制备应用可用于优化单唇深孔钻导向垫的表面。该研究项目的结果有利于工具制备工艺的发展，从而提高表面质量。除了增强涂层附着力外，还应实现准备好的工具的表面光滑。除了磨料水射流喷砂之外，还将转移另一个应用范围的两种不同的高精度表面处理。这些将是抛光研磨和皮带精加工。这些运动学上不同的过程中的每一个都保证了高表面质量并导致改变的表面结构。将分析涂层前处理和涂层后处理对表面纹理化的影响以及单唇深孔钻的形状和表面变化。在回火钢42CrMo4+QT（AISI 4140）与低硫含量的钻削试验有助于了解的相互作用时，应用准备单唇深孔钻和功能的工具性能的评估。

Single lip deep hole drilling is particularly characterized by the ability to produce a high bore hole quality, consequently by doing without subsequent machining procedures for quality improvement. Resulting bore hole quality is crucially based on the condition of the cutting part and its guidance elements within the bore hole. When applying single lip deep hole drills with insufficient surface qualities of the guiding pads as well as a progressive tool wear, failures and valleys in the external zone of the bore surface occur.The follow-up project will help to understand the tribological interactions between the cutting part and the bore hole surface during single lip deep hole drilling. The project objectives include the analysis of interdependencies of specific pre- and post-coating treatments with the performance of prepared drilling tools. Therefore targeted preparation applications are used for optimizing the surfaces of the guiding pads of single lip deep hole drills. The results of the research project benefits the development of tool preparation processes which leads to improved surface qualities. Beside an enhanced coating adhesion, a surface smoothing on prepared tools shall be achieved. In addition to the abrasive water jet blasting two further different high-precision surface treatments of another scope of application are going to be transferred. These will be polish-grinding and belt-finishing. Each of these kinematical different procedures guarantees high surface qualities and leads to an altered surface structure. The impact of respective pre- and post-coating treatments on surface texturization will be analyzed as well as the resulting shape and surface changings of the single lip deep hole drills. Drilling tests in tempered steel 42CrMo4+QT (AISI 4140) with lower sulphur content help to understand the interactions when applying prepared single lip deep hole drills and function for evaluation of the tool performance.