DDZ - Zverejnená dizertačná práca

Výskum vplyvu povlakovania pílových kotúčov na ich energetickú náročnosť

Autor
Štefánek, Milan
Školiteľ
Kováč, Ján
Oponent
Hric, JozefOčkajová, AlenaSiklienka, Mikuláš
Škola
Technická univerzita vo Zvolene FEVT KELT (FEVT)
Rok odovzdania
2018
Počet strán
80.s
Trvalý odkaz - CRZP
https://opac.crzp.sk/?fn=detailBiblioForm&sid=DD9282570EFDEA065078A9AC0787
Primárny jazyk
slovenčina

Typ práce
Dizertačná práca

Študijný odbor
2329 | výrobná technika

Dátum zaslania práce do CRZP
05.06.2018

Dátum vytvorenia protokolu
05.06.2018

Práca je zverejniteľná od
ihneď

Elektronická verzia
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Wood sawing is performed by its deformation with help of an active element - a cutting mechanism (saw blade), whose physical properties and material nature can be different. The cutting mechanism must have high cutting performance, operational reliability, long tool life, low weight, simple construction, quickly ready to work, and must cut tribe the diameter of which is normally found in the forest as determined. Wood cutting in the transverse direction is the most widespread in the mining process, utilized in tree mining, shortening length of the tribes, assortment production. In practice, it is particularly important that the entire woodcutting process proceeds from the smallest energy demands (i.e., the energy intensity of the whole process). Several factors, such as the choice of the appropriate cutting tool material, its geometry and optimal cutting conditions, affect the energy demand of the sawmills machine (cutting speed vc, feed rate vf, feed to tooth fz). An especially important factor in energy performance is cutting performance. A possible solution to achieve lower energy demands would be to reduce cutting resistivity by applying suitable coatings that would be cost-effective to reduce the cutting resistance and increase the durability of the cutting edge of the saw blade teeth. The aim of the dissertation is to determine the impact of coatings on the energy intensity of the saw blades. By making experimental measurements to confirm or refute their justification for the transversal cutting of wood. The experimental conditions were taken from previous experiments and their suitability was verified by the calculations. Two types of saw blades (SB with SC slices and PK without SC slices) and two types of wood (beech and spruce) were used in the experiments. The saw blades were coated with three types of PVD coatings. The result of the thesis is the measured values of the performance of the transversal process of wood that we compared with each other using the statistical program. The least energy intensive saw blade is a sintered carbide-free saw blade with a coating (AlTiN) at a displacement speed of 12 m·min-1 and a cutting speed of 60 m·s-1 with a power of 1310,63 W. When sawing spruce wood it was proven that the most energy-challenging saw blade is a sintered carbide-free saw blade with a coating (AlTiCrN) at a displacement speed of 12 m·min-1 and a cutting speed of 60 m·s-1 with a power of 2113,56 W.

Verzia systému: 6.2.61.5 z 31.03.2023 (od SVOP)