Machining technology: blade machining of steels with friction preheating of the cutting zone

摘要

The thermofriction cutting (TFC) process is one of the highly productive machining methods, in which preheating of the cutting zone is performed by a steel disc that is in contact with the workpiece and rotates at 50 to 60 rpm. As a result of the heating of the metal in the deformation zone to 1000℃ or more, its resistance to cutting decreases significantly - and the cutting force does not exceed 1000 N. The drawbacks of the TFC process are: the poor quality of the machined surface (roughnessR{sub}z = 60-80 μm); the formation of buildups around the perimeter of the part; and the deforming of the surface layer of the part to a depth of 0.6 mm [1].