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Selected energy aspects of GFRP drilling

Polasik Robert

Developments in Mechanical Engineering

2023

nr 19(11)

15--22

Original research results of GFRP drilling, using HSS steel drill bit, process energy indicators were presented in the article. The research stand was a 5-axis DMU50 machining center, equipped with a Kistler force gauge with a signal amplifier and a DAQ data acquisition system. The obtained measurement data were processed using the force gauge manufacturer's software, a spreadsheet and the Statistica statistical data analysis package. As a result of the analysis, on the basis of technological parameters and measured and determined values of cutting force and torque, changes in the values of selected process status indicators were determined; total and specific energy (per unit of material volume removed) generated when making individual holes as a function of the number of holes made. Moreover, the empirical value of the specific cutting resistance kc was determined. As a result of the experimental work carried out and the analysis of available literature in the scope of the article, conclusions were formulated regarding the energy indicators of the process - total and specific energy generated during processing, as well as possible causes of thermal damage to the processed material were indicated.