EVALUATION OF DAMAGE OF ROUNDWOOD ASSORTIMENTS CAUSED BY VARIED CONSTRUCTION, TECHNICAL SOLUTIONS AND CONDITIONS OF HARVESTER HEAD FEED ROLLERS
DOI:
https://doi.org/10.17770/etr2021vol3.6609Keywords:
soft feed rollers, standard feed rollers, agressive feed rollers, timber damages, roundwood assortimentsAbstract
The purpose of this study was to evaluate the depth of damages caused by harvester head feed roller spikes to birtch veneer logs, harvested according to top diameter group (18x25cm, 25<cm), spruce sawlogs (6x10cm), spruce and pine sawlogs according to top diameter group (10x14cm, 14x18cm).
Thirteen technical solutions and conditions of the harvester head soft feed rollers (Moipu Standard, Rib), standard feed rollers (Multi-Tree Handling (MTH), Steel Thumbnail) and agreesive feed rollers (TP) were tested in this study.
Regulation parameters of hydraulic system and angles of delimbing knife blades during the harvesting of stems in different woodland types and seasonality using single grip harvesters: John Deere 1270E, John Deere 1070E and John Deere 1070D equipped with harvester heads: H754; H480C and H460 were examined in clearcutting and thinning operations in twenty four wood felling sites in Kurzeme and Vidzeme region of Latvia.
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References
Y. Gerasimov, A. Seliverstov, and V. Syunev, Industrial round-wood damage and operational efficiency losses associated with the maintenance of a single-grip harvester head model: A case study in Russia. Forests 3: 2012, pp. 864-880.
John Deere. Operation and Maintenance Manual for Harvester Head John Deere 758HD; John Deere: Moline, IL, USA, 2008.
P .Jönsson and B. Hannrup, 2007. Virkesvärdestest 2006 – virkesskador [Timber-value tests 2006 – timber damage and defects]. Skogsforsk Resultat 2007 (7). 4 p.
Z. Karasewski and A. Lacka, “Damage caused by harvester head feed rollers to alder, pine and spruce”. Drewno 2016, Vol. 59.
A. Kariniemi, Kuljettajakeskeinen hakkuukonetyönmalli – työn suorituksen kognitiivinen tarkastelu [Operator-specific model for mechanical harvesting – cognitive approach to work performance].Helsingin yliopiston metsävarojen käytön laitoksen julkaisuja 38, 2006, 126 p.
P. S. Mederski, Możliwości zastosowania harwestera do pozyskiwania drewna wmieszanych drzewostanach brzozowo-sosnowych (The potential of harvester use for thinning operations in mixed birch-pine stands). Wydawnictwo Uniwersytetu Przyrodniczego w Poznaniu, Poznań 2013.
Y.Nuutinen and K.Väätäinen, “Operational efficiency and damage to sawlogs by feed rollers of the harvester head”. Silva Fenn., 44, 2010, pp. 121–139.
H. Ovaskainen,“Timber harvester operators’working technique in first thinning and the importance of cognitive abilities on work productivity”. Dissertationes Forestales 79, 2009, 62p.
R. Spinelli and N. Magagnoti , “Work quality and veneer value recovery of mechanized and manual log-making in Italian poplar plantations”. European Journal of Forest Research 130, 2011, pp.737-744.
K.Väätäinen and H. Ovaskainen, Hakkuukoneenkuljettajan hiljaisen tiedon merkitys hakkuutulokseen työpistetasolla (The significance of harvester operator’s tacit knowledge on cutting with single grip harvester). Metsäntutkimuslaitoksen tiedonantoja 937, 2005, 100 p.
A. Węgrzyn and N. Leszczyński N, “Rolki posuwu głowic harwesterowych (Feed rollers in harvester heads).” Technika Ogrodnicza Rolnicza i Leśna 3. 2014, pp. 6-8.
