The study presents the state-of-the-art of cryogenic technology and its possibility for increasing productivity in serial production in machining processes. It has been shown, that using cryogenic machining can improve the machinability of difficult-to-cut materials (e. g. Inconel 718, 42CrMo4, Bohler M390), which is reflected in lower tool-wear and longer tool-life. Furthermore, this allows increase in the cutting speed and consequently an increase in the productivity of the machining processes.
F.02 Acquisition of new scientific knowledge
COBISS.SI-ID: 15483163Modern trends in machining lean towards the use of dry machining processes, or in combination with alternative cooling lubricants such as minimum quantity lubrication (MQL), cryogenic or high pressure machining. High heat generation is critical for workpiece quality and tool life. Lubrication in the cutting zone is an effective way to reduce the generated friction and consequently heat. Solid nano lubricants have proven to be an effective way to reduce the friction in mechanical contacts. The most acclaimed substances include recently synthesized graphene and molybdenum disulfide. Also, their application in the machining processes can provide the reduction of the friction in the cutting zone, which consequently results in the prolonged tool life, increased surface quality, higher productivity and economically viable process. Different cooling lubrication techniques were tested by evaluating their influence on the coefficient of friction by the use of special tribometer, designed for high contact pressures.
F.02 Acquisition of new scientific knowledge
COBISS.SI-ID: 15601435Modern trends in machining lean towards the use of dry machining processes, or in alternative cooling-lubrication systems such as Minimum Quantity Lubrication (MQL), cryogenic or high pressure systems. High heat generation is critical for the quality of workpiece surface, tool life and energy consumption. Lubrication in the cutting zone is an effective way to reduce the generated friction and consequently heat. Solid lubricants have proven to be an effective way in reducing the friction in mechanical contacts. The most acclaimed substances include recently synthesized graphene and molybdenum disulphide. Also, their application in the machining processes can provide the reduction of the friction in the cutting zone, which consequently results in the prolonged tool life, increased surface quality, higher productivity and economically viable process. Different cooling lubrication techniques were tested by evaluating their influence on the coefficient of friction by the use of special tribometer, designed for high contact pressures. This work thus shows the potential of solid lubricants for improving machining performance.
F.02 Acquisition of new scientific knowledge
COBISS.SI-ID: 15603483