Loma's plant in Dallas/Fort Worth has introduced a large MA-600HII horizontal machining center equipped with 5ME's patented cryogenic cutting system for F-35 large-size titanium body components. Roughing and finishing. The cutting test was carried out using 6Al4V titanium alloy. The results show that the cutting speed of the 5ME system is increased by 52% compared with the currently used equipment (5ME low temperature cutting system takes 21 hours, while conventional equipment takes 44 hours), and the tool loss does not change.
The 5ME cryogenic cutting system uses a carbide low temperature end mill that also helps to improve surface integrity and local quality while reducing whitening. Loma said that low-temperature cutting technology will help reduce the processing cost of large-size titanium parts by 30%, and will continue to cooperate with 5ME, Daxie, Hartwig.
PeteTecos, executive vice president of 5ME, said: "Our experiments with Loma have shown that the use of low-temperature cutting technology to process difficult-to-machine materials such as titanium has great commercial advantages. This can significantly reduce the cost of projects such as F-35, and not only Increased cutting speed, reduced energy consumption, increased operational safety, and no need for liquid coolant, eliminating the need for additional equipment."
5ME's patented liquid nitrogen cryogenic technology allows liquid nitrogen to flow under the spindle and cutting edge, which provides better cooling. Low temperatures help to increase the cutting speed, which makes liquid nitrogen low temperature processing an ideal processing method for difficult materials. The system can be self-pressurized without the need for pumps and other power consuming equipment. There are three options for system storage: individual processing equipment can use vacuum containers (or dewars), processing plants can use fast and easy cold containers, and mass production can use central/external storage equipment.
To ensure that the core device is not exposed to low temperatures, the feed system of the machining center adds a vacuum jacketed insulated wire between the liquid nitrogen source and the sub-cooling system, and between the spindles. The system supplies ultra-cold liquid nitrogen (-196 ° C) to specialized tools and applications at specific pressures and flow rates. The sub-cooler is a patented technology that removes the heat generated by the pressure out of the system and condenses the two-phase liquid nitrogen (gaseous and liquid) into a 100% pure liquid to prevent gas formation due to heat leakage and pressure drop. .
The cryostat allows the operator to set the flow rate as required. Moreover, the cryogenic processing system can be retrofitted to almost all original equipment manufacturer (OEM) spindles and there are a variety of tool interfaces available. 5ME has specially designed low temperature machining tools for this system, including fixtures, turning and grooving tools, carbide milling cutters and drill bits, indexable milling cutters and drilling tools.
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