Fluid-free lubrication systems for high mechanically loaded linear bearings by coating optimization of the functional elements

在该项目的框架内，将展示一个解决方案，即如何通过使用合适的固体和对反体进行适当的表面处理来使机械负荷高的滚动接触获得无流体润滑。作为试验应用，选择了系统滚子轴承直线导轨，因为这在技术上具有很高的相关性，并且典型的载荷谱(振荡运动、停机时间)注定是无流体润滑。这就是要论证技术可行性的地方，必须形成稳定的转移膜。一方面，这是为了将摩擦学系统的基体体和对应体分开，以确保低磨损运行，同样减少摩擦，从而也存在热亚临界平衡状态。最初，使用简单的摩擦学测试来评估各种固体、表面改性和输送选项。借助现代表面分析，分析了层形成过程中的潜在转移过程，并确定了目标解决方案。以下数值方法(有限元分析和分子动力学)被用来模拟作用机理。第二，研究结果被转移到一个真实的演示系统。本研究项目的主要目的是确定在滚动接触中形成转移膜的机理，并能够借助合适的模型从理论上对其进行描述。因此，可以采取措施以有针对性的方式控制过程，最终直接在实际系统中进行控制。该项目的创新方法不仅是提供固体润滑剂，而且还通过表面改性来优化要形成转移膜的表面的条件。

Within the framework of the project, a solution is to be shown how mechanically high loaded rolling contacts can be lubricated fluid-free through the use of suitable solids and an adapted surface treatment of the counter-body. As a pilot application, a system roller bearing linear guide was selected, since this is technically highly relevant and the typical load spectrum (oscillating motion, downtime) is predestined for a fluid-free lubrication. This is where the technical feasibility is to be demonstrated and it is necessary that a stable transfer film be formed. On one hand, this is intended to separate the base body and the counter body of the tribological system in order to ensure low-wear operation and likewise to reduce the friction, so that a thermally subcritical equilibrium state is also present. Initially various solids, surface modifications and delivery options are evaluated using simple tribological tests. With the aid of modern surface analysis, the underlying transfer processes during layer formation are analyzed and targeted solutions identified. The following numerical methods (FEA and molecular dynamics) are used to model mechanisms of action.Secondly, the findings are transferred to a real demo system. The main goal of this research project is to identify the mechanisms leading to transfer film formation in rolling contacts and to be able to describe them theoretically with the help of suitable models. As a result, measures can be derived to control the processes in a targeted manner, ultimately directly in the real system. The innovative approach of the project is not only to provide a solid lubricant but also to optimally condition the surfaces on which the transfer film is to be formed by means of surface modification.