Improvement of part live span by influencing the surface integrity machined with the hybrid process combination turn-rolling.

研究现状表明，机械表面强化工艺深轧是一种改变表面完整性，提高高应力构件强度和寿命的合适方法。通过将工艺温度和深轧结合起来，可以进一步提高寿命。然而，这需要一个额外的过程步骤，因此没有得到广泛应用。这一缺点可以通过与切割过程并行化来消除。因此，车削滚压工艺是加工高性能零件的一种有效方法。计划项目的总体目标是对联合热机械处理中的作用机理进行基本调查和建模，目的是通过量身定做的表面完整性特性来提高目标寿命。为此，可以通过热深轧来有针对性地调整表面完整性。随后，对加工过程和零件温度之间的作用机理进行了建模，以便通过加工过程将必要的热能引入零件，并允许热深轧。在此基础上，为车-轧联合工艺调整表面完整性性能奠定了基础。最后，证明了由于车削-轧制过程和温度的函数，零件的寿命延长。这些研究是基于这样的假设，即不仅在较高的温度下可以获得更高的残余应力值，而且这些值也比在较低的温度下更稳定。

The current state of the research shows that the mechanical surface strengthening process deep rolling is a suitable method for changing the properties of surface integrity to increasing the strength and lifespan of highly stressed components. A further increase in the lifespan can be reached by the combination of process temperature and deep rolling. However, this requires an additional process step and is therefore not widely used. This disadvantage can be eliminated by parallelization with cutting processes. Thus, the turn-rolling process is an efficient possibility for processing high-performance components. The overall objective of the planned project is the basic investigation and modeling of the mechanisms of action in combined thermomechanical processing for the purpose of targeted lifespan improvement through tailor-made properties of surface integrity. For this purpose, the targeted adjustment of the properties of surface integrity by thermal deep rolling is made possible. Subsequently, the mechanisms of action between the machining process and the temperature of the component are modeled so that the necessary thermal energy can be induced into the component through the machining process and allows thermal deep rolling. Based on this, bases for the adjustment of properties of surface integrity by the combined turn-rolling process are formed. Finally, the prolonged lifespan of components is demonstrated as a result of the turn-rolling process and a function of the temperature. These investigations are based on the hypothesis that not only higher residual stress values can be achieved at higher temperatures, but that these are also more stable than at lower temperatures.