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Modeling of micro-grinding forces considering dressing parameters and tool deflectionKadivar, Mohammadali ; Azarhoushang, Bahman ; Krajnik, Peter, strojnikThe prediction of cutting forces is critical for the control and optimization of machining processes. This paper is concerned with developing prediction model for cutting forces in micro-grinding. ... The approach is based on the probabilistic distribution of undeformed chip thickness. This distribution is a function of the process kinematics, properties of the workpiece, and micro-topography of the grinding tool. A Rayleigh probability density function is used to determine the distribution of the maximum chip thickness as an independent parameter. The prediction model further includes the effect of dressing parameters. The integration of the dressing model enables the prediction of static grain density of the grinding tool at various radial dressing depths. The tool deflection is also considered in order to account for the actual depth of cut in the modeling process. The dynamic cutting-edge density as a function of the static grain density, the local tool deflection, elastic deformation, and process kinematics can hence be calculated. Once the chip thickness is calculated, the single-grain forces for individual abrasive grains are predicted and the specific tangential and normal grinding forces simulated. The simulation results are experimentally validated via cutting-force measurements in micro-grinding of Ti6Al4V. The results show that the model can predict the tangential and normal grinding forces with a mean accuracy of 10% and 30%, respectively. The observed cutting forces further imply that the flow stress of the material did not change with changing the cutting speed and the cutting strain rate. Moreover, it was observed that the depth of cut and grinding feed rate had the same neutral effect on the resultant grinding forces.Source: Precision engineering : journal of the International Societies for Precision Engineering and Nanotechnology. - ISSN 0141-6359 (Vol. 67, Jan. 2021, str. 269-281)Type of material - article, component partPublish date - 2021Language - englishCOBISS.SI-ID - 86324739
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source: Precision engineering : journal of the International Societies for Precision Engineering and Nanotechnology. - ISSN 0141-6359 (Vol. 67, Jan. 2021, str. 269-281)
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Kadivar, Mohammadali | ![]() |
Azarhoushang, Bahman | ![]() |
Krajnik, Peter, strojnik | 23470 |
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