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Content available remote Modeling of cutter displacements during ball end milling of inclined surfaces
Wojciechowski S., Chwalczuk T., Twardowski P., Krolczyk G. M.
Archives of Civil and Mechanical Engineering
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2015
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Vol. 15, no. 4
798--805
EN
This work concentrates on the modeling of cutter's displacements during ball end milling with various surface inclinations. The cutter's displacements (vibrations) model including: tool's geometry, cutting conditions, surface inclination angle, run out and tool's deflections (induced by the cutting forces) was proposed. Subsequently, this model was validated empirically during the milling tests with various feed per tooth (fz), depth of cut (ap) and surface inclination angle (α) values. Experiments were carried out with the application of laser displacement sensor and force dynamometer. The research revealed that cutter's displacements are strongly affected by the cutter's run out and surface inclination. This observation is also confirmed by the developed model.
2
Content available remote Determination of tool life and research wear during duplex stainless steel turning
Krolczyk G. M., Nieslony P., Legutko S.
Archives of Civil and Mechanical Engineering
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2015
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Vol. 15, no. 2
347--354
EN
The purpose of the study is to determine the coated carbides tool life and the tool point surface topography. The study determined the cutting conditions in the process of turning duplex stainless steel (DSS), and detailed identification of wear mechanisms occurring on the rake face and major flank. The results of wear occurring on both tool points were compared with the width of the flank wear in relation to the period of the steady-state wear of the tool point. Occurrences of various mechanisms have been proven, such as abrasive wear and adhesion wear. Where machining without the use of a cooling lubricant occurred, longer tool life has been determined as well as a greater resistance to abrasive wear of the tools which were coated with Al2O3. Scanning electron microscopy (SEM) has been used for the wear analysis.
3
Content available Experimental analysis by measurement of surface roughness variations in turning process of duplex stainless steel
Krolczyk G. M., Legutko S.
Metrology and Measurement Systems
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2014
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Vol. 21, nr 4
759--770
EN
The objective of the investigation was to identify surface roughness after turning with wedges of coated sintered carbide. The investigation included predicting the average surface roughness in the dry machining of Duplex Stainless Steel (DSS) and the determination of load curves together with roughness profiles for various cutting conditions. The load curves and roughness profiles for various cutting wedges and variable cutting parameters were compared. It has been shown that dry cutting leads to a decrease in friction for lubricated surfaces, providing a small initial contact area where the surface is contacted. The study has been performed within a production facility during the production of electric motor parts and deep-well pumps.
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