THE STUDY OF TEMPERATURE FIELD WHEN GRINDING WITH ULTRASONIC ACTIVATION


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Abstract

The application of ultrasonic vibrations power is the promising direction of the grinding process efficiency improvement. To estimate the work conditions of grinding wheel and the quality parameters of the surface layer of a blank part, it is necessary to know local temperatures. However, the analytical research of local temperatures when grinding with ultrasonic vibrations is not carried out.

The goal of this research is the determination of vibrations parameters influence on the temperature field of grinding process.

The research objectives are: the development of physical and mathematical models for calculation of temperature field, methodology, algorithm and software for temperatures calculation, temperature numerical simulation.

Scientific novelty: it is the first analytical research of temperature field when grinding with ultrasonic activation.

The authors developed physical and mathematical models for calculation of temperature field while grinding that take into account the alteration of kinematics of abrasive grains micro-cutting and the mechanical properties of blank part material while grinding with ultrasonic activation, and the parameters dependences characterizing blank part material dispersion resistance and thermophysical properties of interacting objects materials (abrasive grain, blank part, chippings, environment) on the temperature. The simulation is carried out on the basis of joint solution of thermal conductivity differential equations written for each interacting object. To calculate equations, the authors used the finite-elements method. The authors developed the methods and the software for temperature field calculation. The article gives the results of numerical simulation of temperatures by low vibration amplitudes slightly changing micro-cutting kinematics. By ultrasonic vibrations, the blank part temperature was by 10% lower, and the local temperatures in the zone of contact of abrasive grain with the blank part and the chippings was by 14% and 15% lower correspondingly.

About the authors

Aleksandr Nikolaevich Unyanin

Ulyanovsk State Technical University, Ulyanovsk

Author for correspondence.
Email: a_un@mail.ru

Doctor of Engineering, Associate Professor

Russian Federation

References

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