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Vpliv napak lesa na produktivnost dela pri izdelavi prostorninskega lesa listavcev s cepilnim strojem Kolenc in krožno žago Krpan
Ovsenek, Anže (Author), Marenče, Jurij (Mentor) More about this mentor... This link opens in a new window

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Abstract
Namen diplomske naloge je bil ugotoviti ali premer in napake lesa vplivajo na učinkovitost proizvodnje in porabo goriva. Meritve za izdelavo diplomskega dela so potekale na zasebni posesti na Brezjah pri Tržiču. Ugotovljen je bil vpliv grč in premera bukovih sortimentov na produktivnost ter porabo goriva pri proizvodnji drv. Na podlagi popisa napak lesa so bili sortimenti razvrščeni v skupine. Pet sortimentov je imelo premere približno 50 cm, petnajst sortimentov pa približno 20 cm. Z ustreznim standardom so bili sortimenti razvrščeni v kakovostne razrede. Izmerjena je bila poraba goriva pri traktorjih in motorni žagi. Narejena je bila časovna študija proizvodnje drv in kalkulacija stroškov uporabljenih strojev. S statističnimi metodami je bila dokazana različna učinkovitost proizvodnje med tanjšimi in debelejšimi sortimenti. Pri operaciji cepljenje je bila učinkovitost proizvodnje tanjših sortimentov za 1 m3/h višja za kot pri debelejših sortimentih. Pri prežagovanju debelejših sortimentov z motorno žago je bila učinkovitost višja za 7,8 m3/h v primerjavi z tanjšimi. Grče prav tako vplivajo na učinkovitost proizvodnje drv. Učinkovitost proizvodnje pri sortimentih z grčami nad 40mm je bila na ravni cikla nižja za 0,27 m3/h in pri operaciji cepljenje za 1,41 m3/h v primerjavi z sortimenti brez grč. Povprečna poraba goriva motorne žage je znašala 104 ml/m3, maziva pa 23 ml/m3. Pri tanjših sortimentih je bila ugotovljena višja poraba goriva po enoti proizvoda (za 33 ml/m3), pri sortimentih z grčami pa za 40 ml/m3. Cena dela je v povprečju znašala 17,99 €/m3, pri drobnejših sortimentih 15,59 €/m3, pri debelejših pa 18,91 €/m3.

Language:Slovenian
Keywords:bukova drva, učinkovitost, vpliv napak, poraba goriva, delovna operacija, sortimenti, časovna študija
Work type:Bachelor thesis/paper (mb11)
Organization:BF - Biotechnical Faculty
Year:2018
COBISS.SI-ID:5132710 Link is opened in a new window
Views:494
Downloads:200
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Secondary language

Language:English
Title:The influence of wood characteristics onto production of firewood using Kolenc woodsplitter and circular saw Krpan
Abstract:
The purpose of the research was to determine whether the diameter and defects of wood affect the efficiency of production and fuel consumption. Measurements for the preparation of the bachelor’s thesis were performed on the private property at Brezje pri Tržiču. The influence of knots and diameter of beech assortments was ascertained on productivity and the consumption of fuel in the production of firewood. The assortments were classified into groups on the basis of the list of errors. Five assortments were approximately 50 cm in diameter. Fifteen assortments were approximately 20 cm in diameter. The assortments were classified to quality classes by means of the appropriate standard. The consumption of fuel was measured in tractors and circular saws. A time study of firewood production and a cost calculation of the used machines were made. Various efficiencies of the production between thinner and thicker assortiments were proved by means of statistical methods. In the case of the operation splitting, the efficiency of the production of thinner assortments was 1 m3/h higher as in the case of thicker assortiments. In circular saw sawing of thicker assortiments the efficiency was higher for 7.8 m3/h in comparison to the thinner assortiments. Knots also influence the efficiency of firewood production. The efficiency of the production from the assortiments with knots over 40 mm was 0.27 m3/h lower on the level of the cycle, and, in the operation splitting, 1.41 m3/h in comparison to the assortiments without knots. The average consumption of fuel of the circular amounted to 104 ml/m3. The average consumption of lubricant was 23 ml/m3. The consumption of fuel per unit of the product was ascertained higher (for 33 ml/m3) in thinner assortments. The consumption of fuel per unit of the product was ascertained for 40 ml/m3 higher in assortments with knots. The price of labor was on average 17.99 €/m3. The price of labor was 15.59 €/m3 in thinner assortments. The price of labor was 18.91 €/m3 in thicker assortments.

Keywords:beech firewood, efficiency, the impact of errors, fuel consumption, working operation, assortments, time study

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