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Predelava in izkoristek lesa smreke pri delu s horizontalnnim tračnim žagalnim strojem : diplomsko delo - visokošolski strokovni študij
Smrečnik, Herman (Author), Marenče, Jurij (Mentor) More about this mentor... This link opens in a new window

URLURL - Presentation file, Visit http://www.digitalna-knjiznica.bf.uni-lj.si/vs_smrecnik_herman.pdf This link opens in a new window

Abstract
V diplomski nalogi so predstavljeni izkoristki lesa pri razžagovanju debel smreke različnih debelinskih stopenj. Pri tem so pomembne tudi vrste in količine različnih končnih izdelkov, ki jih dobimo pri takšni mehanski predelavi. Ugotovljeno je bilo, da so izkoristki lesa sortimentov pri žaganju v določenih primerih zelo visoki, tudi nad 80 %, izkoristki celotnih debel pa do skoraj 80 %. Stopnja koničnosti, kot napaka hlodovine, ne vpliva vedno na izkoristek negativno in je lahko v določenih primerih ta celo višji kot pri nizki stopnji koničnosti. Na izkoristek v veliki meri vplivajo predvsem izkušenost upravljavca stroja, vrste žagarskih produktov ter dimenzije sortimentov. Pri žaganem lesu prevladujejo grede, deske, trami, medtem ko so letve, morali in plohi zastopani v manjših deležih. Količinsko je žagovina zastopana v deblih z okrog 10 % deležem.V večini primerov povprečna debelina skorje z višanjem debelinske stopnje narašča. Tudi delež skorje debel po debelinskih stopnjah se spreminja in v našem primeru znaša 6-8 %.

Language:Slovenian
Keywords:žagarski obrati, smrekovina, gozdni proizvodi, žage, žagalni stroji, predelava lesa, izkoristki
Work type:Undergraduate thesis (m5)
Tipology:2.11 - Undergraduate Thesis
Organization:BF - Biotechnical Faculty
Year:2010
Publisher:[H. Smrečnik]
Number of pages:VII, 58 f.
Place:Ljubljana
UDC:630*82(043.2)=163.6
COBISS.SI-ID:3081894 Link is opened in a new window
Views:579
Downloads:175
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Secondary language

Language:Unknown
Abstract:
This thesis presents the yields from timber when sawing spruce logs of different diameters. The types and quantities of the various finished products obtained from such mechanical processing are also important. It was found that, in certain cases, the yields from timber assortments when sawing were very high, even over 80%, and the yields from the total trunks were up to nearly 80%. The degree of taper, as an error of the logs, does not always have a negative effect on the yield, and, in some cases, may even be higher than the low level of taper. The yield is largely and mostly influenced by the machine operator`s experience, the types of sawmill products, and the dimensions of the assortments. With sawn wood, the posts, planks and beams predominate, while the laths, strips, and boards are presented in smaller proportions. In terms of quantity, the amount of sawdust left over from cutting logs is presented to be approximately 10%. In most cases, when the diameter increases, the average thickness of the bark increases. The amount of bark on a log varies according to the diameter and, in our case, amounts to 6-8%.


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