Abstract:
In the machining operation the energy dissipated is converted into heat which
raises the temperature in the cutting zone. The increase of cutting temperature results tool
wear, surface roughness, dimensional inaccuracy significantly. Not only is the cutting
temperature, cutting force also increases with tool wear which results the increase of
power and specific energy consumption. The cutting temperature restrains productivity,
quality and hence machining economy, can be controlled by the application of cutting
fluid. But conventional cutting fluids are ineffective to control the temperature in
maximum cutting zones. So cryogenic cooling is environmental friendly new approach to
control the temperature desirably. Cryogenics is the study of the production of very
low temperature (-196°C) and the behavior of materials at that temperature. The physical
behavior during metal cutting has been changed because of cutting condition, cutting
environment and work/tool material.
The aim of the present work is to investigate the role of cryogenic cooling on the
formation of chip, cutting temperature and force and then develop analytical model for
cutting temperature and force in turning 42CrMo4 steel under cryogenic cooling condition.
The m.files of matlab has been used to determine the modeled value of cutting force and
cutting temperature under cryogenic cooling condition. From an economic viewpoint, it is
evident that having knowledge about the machining responses such as, cutting forces,
cutting temperature and work piece surface integrity at different cutting conditions would
be highly desirable as a means of realizing cost savings, increased productivity, efficiency
and for preventing any hazard occurring to the machine, cutting tool or the deterioration of
the quality.
