6G will come with a multitude of new features that will improve communication. These features will be strongly driven by Artificial Intelligence that is processing communication data and derive information. One feature that is already well discussed in the Research World is Joint Communication and Sensing. This says that along with the pure information transport the electromagnetic waves will be used to derive more information from the environment, which might be positioning information or perception of barriers. All these information will internally be used to then optimize the 6G Network with e.g., high precision beam forming or movement prediction for User Equipment. Be-side these internal optimizations, there will also be a multitude of external applications that can benefit from these information. By processing these information, external applications are capable of deriving further relevant information that can be used to integrate new management capabilities. This paper gives an outlook on the multitude of possibilities to exploit these information for various use cases, to make 6G not just another mobile communication standard but to enable an integration level for a communication technology that can be the unique selling point for 6G
Due to an excellent ratio of high strength to low density, as well as a strong corrosion resistance, the titanium alloy Ti-6Al-4 V is widely used in industrial applications. However, Ti-6Al-4 V is also a difficult-to-cut material because of its low thermal conductivity and high chemical reactivity, especially at elevated temperatures. As a result, machining Ti-6Al-4 V is characterized by high thermal loads and a rapidly progressing thermo-chemical induced tool wear. An adequate cooling strategy is essential to reduce the thermal load and therefore tool wear. Sub-zero metalworking fluids (MWF) which are applied at liquid state but at supply temperatures below the ambient temperature, offer great potential to significantly reduce the thermal load when machining Ti-6Al-4 V. Within the presented research, systematically varied sub-zero cooling strategies are applied when milling Ti-6Al-4 V. The influences of the supply temperature, as well as the volume flow and the outlet velocity are investigated aiming at a reduction of the thermal loads that occur during milling. The milling experiments were recorded using high-speed cameras in order to characterize the impact of the cooling strategies and resolve the behavior of the MWF. Additionally, the novel sub-zero cooling approach is compared to a cryogenic CO2 cooling strategy. The results show that the optimized sub-zero cooling strategy led to a sufficient reduction of the thermal loads and does outperform the cryogenic cooling even at elevated CO2 mass flows.
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