Publications by authors named "Edward Miko"
This piece of work deals with the influence assessment of the kind of coating of the cutting inserts and their wear on the dimensional accuracy and the top layer microstructure and roughness of the surface machined with constant cutting parameters = 85 m/min, = 0.14 mm/obr and = 0.2 mm.
View Article and Find Full Text PDFThis article shows how different drilling strategies may affect the geometrical and dimensional accuracy of deep through holes. The tests were conducted on a three-axis direct-drive turning center. The holes were drilled in cylindrical PA6 aluminum alloy specimens 30 mm in length and 30 mm in diameter using 6 mm Ø VHM HPC TiAlN-coated twist drill bits.
View Article and Find Full Text PDFThe technology of producing threads, especially in materials that are difficult to cut, is a rare subject of research and scientific publications. The requirements for the production of these elements apply not only to the geometry, but also to the quality of the surface obtained. This is particularly important in the aviation industry, where the durability of the threaded connection affects passenger safety.
View Article and Find Full Text PDFThis article discusses experimental results concerning the quality of through holes drilled in Inconel 718. The tests involved hole cutting under 27 different conditions using different values of the feed per revolution and spindle speed, and different types of kinematic system. The drilling was performed on a CTX Alpha 500 universal turning center using tools with internal coolant supply.
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- - This article investigates how different kinematic systems impact the accuracy of drilled through-holes, specifically focusing on the geometric and dimensional qualities of the holes produced.
- - The study involved drilling holes in a C45 steel cylinder using a specific drill bit, testing three distinct kinematic systems where either the tool or workpiece was fixed or rotated.
- - Utilizing the Taguchi orthogonal array method and ANOVA for analysis, the research found that all input parameters—cutting speed, feed per revolution, and kinematic system—significantly affected the quality of the drilled holes.
This article discusses the relationship between the kinematic system used in drilling and the quality of through-holes. The drilling was done on a CTX Alpha 500 universal turning center using a TiAlN-coated 6.0 mm drill bit with internal cooling, mounted in a driven tool holder.
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- - The article discusses a study that explores how different edge radii of cutting tools impact the relative displacement between the tool and workpiece during longitudinal turning processes, specifically using X37CrMoV5-1 steel.
- - Researchers used a test stand to measure vibrations and relative displacements, discovering standard deviations ranging from 0.36 to 0.78 μm with various edge radii across different feed rates.
- - A key finding was that the smallest relative displacements occurred at a feed rate of 0.12 mm/rev for all tested inserts, leading to the development of a formula to forecast the Ra roughness parameter based on these results.