Turning lathe cutting tool forces

Manufacturing Process and Design

Tool forces vary with cutting speed, feed rate, depth of cut and rake angle. Force may be measured experimentally by using a ‘cutting tool dynamometer’ in which the tool is mounted on a flexible steel diaphragm and its deflections in three planes measured by three electrical transducers. Three meters indicate the force, typically of 25 N up to, say, 2000 N. Graphs show typical characteristics

Symbols used:
Fc =cutting force (in newtons)
Fr = radial force (in newtons)
Ff=feed force (in newtons)

Resultant force on tool in horizontal plane

Resultant Force (Newtons)

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