Machine Hammer Turning – Integration of mechanical surface modification into the cutting operation

机械表面处理通常代表机加工后的附加工艺步骤。本研究的目的是实现表面微织构加工过程中的并行加工过程中使用锤击车削工艺策略。这里的目标参数是通过表面的各向异性微观纹理来设置方向相关的摩擦系数，由此导致的硬化增加旨在补偿微观纹理引起的缺口效应的后果。在第一个项目阶段，证明了工艺组合的可行性。在该项目的继续过程中，这些发现将被转移到轴的生产和显微织构化中。这里的重点是微观织构的摩擦学行为。这是由于表面层的塑性变形，这是由垂直于表面的切削工具的压痕引起的。通过模拟和实验获得的机理认识，对锤击车削微织构表面的摩擦学行为进行了专门的调整。当微纹理通过锤击工具的切削刃发生时，前刀面和后刀面可产生鳞片状微纹理。这种鳞片状形貌旨在表现出摩擦和磨损方面的各向异性摩擦学行为。

Mechanical surface treatments usually represent an additional process step following machining. The aim of this research project is to achieve surface microtexturing during machining in parallel with the machining process using the hammering turning process strategy. The target parameter here is the setting of a direction-dependent friction coefficient by means of an anisotropic microtexture of the surface, whereby a resulting increase in hardening is intended to compensate for the consequences of the microtexture-induced notch effect. In the first project phase, the feasibility of the process combination was demonstrated. In the continuation of the project, these findings are to be transferred to the production and microtexturing of shafts. The focus here is on the tribological behavior of the microtextures. This results from the plastic deformation of the surface layer, which is caused by indentations of the cutting tool perpendicular to the surface. With the help of the mechanism understanding gained from the simulations and experiments, the tribological behavior of a surface microtextured by hammering turning is to be specifically adjusted. As the microtexturing occurs through the cutting edge of the hammering tool, the rake and flank surfaces can produce a scale-like microtexture. This scale-like topography is aimed to exhibit anisotropic tribological behavior in terms of friction and wear.