Title Frezų, padengtų TiCN, CrN ir DLC dangomis, patvarumo dilimui tyrimas /
Translation of Title Investigation of router cutters coated TiCN, CrN, DLC hard coatings to wear.
Authors Kazlauskas, Deividas
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Pages 88
Keywords [eng] hard coatings ; resistance to wear ; surface roughness.
Abstract [eng] The article presents the investigational results, which show resistance of solid tungsten carbide (WC) router cutters not coated and coated by coatings harder than tool material, to wear. The tests were done using the spiral router cutters of finish processing made from solid tungsten carbide which are not coated and which are coated by TiCN, CrN and DLC coatings. The tests were carried out using the oak wood samples, which were down milled in the CNC machining center by three different milling tests. The average temperature in the testing room was t = 19 ± 2°C, and relative air humidity was φ = 60 ± 5 %. The wear of the cutters was evaluated by measuring the helical cutting edge width b. The values of the cutting edge width b were measured optically, using the optical microscope with digital video camera. The received results revealed that the router cutters coated with CrN are the most resistant to wear. The router cutters coated by TiCN and DLC are less durable. The WC router cutters, which are not coated at all, are the least resistant to wear. Also was evaluated a quality of cutting surfaces. Parameter of surface roughness Rz. was the main characteristic of cutting surface quality. Actual value of surface roughness was measured by contact stylus profilometer. The cutting edge width b and cutting surface roughness was measured in the set intervals of cutting path L. The measurements of cutting edge width in each interval of cutting path L were done in three places. Precision of measurement values was ± 2 μm. The received images were processed and measured using the personal computer and software. The measurements of cutting edge width were done in five different places along the fiber. Results were deduced to average values. Gained results were used to make diagrams and consolidated returns.
Dissertation Institution Kauno technologijos universitetas.
Type Master thesis
Language Lithuanian
Publication date 2015