Page 35 - AMTDC Annual Report 2019-20flipbook

The thermal behavior obtained (without coolant)
and results obtained from the cutting trials were
incorporated in various types of mathematical models
(Multi-variable Linear Regression, Support Vector
Machines, Ensemble Models) in a mathematical
analysis software MATLAB. Enabling Machine Tool
The results of the prediction models developed
were validated using experimental results. Thermal Manufacturers to Build
error reduction to 20 µm has been achieved at this
level. The accuracies of the models were improved by High Quality Machines
adding more data points, which required extensive
experimentation. Development and incorporation of
thermal compensation strategy will
In the next level, design and fabrication of
cost-effective electronic modules for capturing thermal enable Indian machine tool
data at different critical zones of the machine were manufacturers, especially turning
taken up for capturing thermal data at different critical machine manufacturers to build
zones of the machine. Resistance Temperature machines suitable for high accuracy
Detectors (RTDs) were used for the capturing the turning operations and hard turning
temperature of the machine at different zones. The applications through the elimination of
design of electronic circuit required to convert the effect of varying ambient temperature
analog data into digital data including the amplifiers, on machined component. The high
microcontroller, optocoupler were obtained and quality machines can be built without
installed in a portable setup. The prediction model any import dependence due to the
developed was coded to the microcontroller and the indigenous research and development
compensation value calculated by the model was of such technology.
transferred to the machine controller. Next, an
algorithm was built for calculating compensation value
at the tool point. The tool wear offset algorithm has
been adopted for compensating for the thermal error,
since the diameter deviation can be compensated with
a single input.

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AMTDC Annual Report | 2019-20