Dry cutting was a controversial processing methods, but with the legal requirements and market development as well as the tool material, coating technology, tool structure and process equipment, the United States, Germany and Japan and other countries have done a lot of research and applied to the actual production, it has achieved remarkable economic and social benefits.
US leblond makino company research and development of "red crescent" (red crescent) cast iron dry cutting technology is the use of a ceramic or cbn tools for high-speed machining. Due to the high cutting speed and feed rate, the heat generated by the tool quickly gathered at the front, where the workpiece material reaches the red-hot state, the yield strength decreases, can greatly improve cutting efficiency. Usually cast iron metal removal rate (turning) of 16cm3 / min, while the use of the red crescent dry cutting can make it up to 149cm3 / min. The company also invented a patented process, can be used carbide tools at cutting speed of 305m / min for hardened steel (> 50hrc) and titanium dry turning, cutting heat produced by high pressure through spindle coolant gas away, cutting temperature can be reduced to a minimum, each revolution of the tool and the workpiece contact may be limited to less than 25%.
