broj: 3-4/1996
pdf (28,4 MB) |
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| IZVORNI ZNANSTVENI ČLANCI | ||
| Matić, S., Oršanić, M., Anić, I. | UDK 630*221.4.001 | |
| Some Features and Problems Concerning Silver Fir (Abies alba Mill.) Selection Forests in Croatia pdf HR EN | 91 | |
| Hrašovec, B., Margaletić, J. | UDK 630*449 : 323.3.001 | |
| Seed Pests and their Impact on Reforestation Efforts in Croatia pdf HR EN | 101 | |
| Španjol, Ž. | UDK 502.7.001 | |
| Environmental Protection in the Republic of Croatia pdf HR EN | 107 | |
| Borzan, Ž., Idžojtić, M., Guttenberger, H. | UDK 630*165.42.001 (Picea omorika Panč.) | |
| Research on the Standardization of Gymnosperm Karyotypes using Picea Omorica as an Example pdf HR EN | 121 | |
| Sever, S. | UDK 630*31+903+681 (497.13).001 | |
| Some Experience in the Attempt to Define Logging Strategies in Croatia, a Country in Transition pdf HR EN | 133 | |
| Horvat, D., Sever, S. | UDK 631*352.5+319.4 : 630*232.326.2+236.9 : 631*072.16.001 | |
| Mulching Flail Mower - one Method for Mechanization of Stand Establishment and Treatment Operations pdf HR EN | 143 | |
| Krpan, A. P. B. | UDK 630*379.001 | |
| Problem of Skidding Timber in Croatian Lowland Forests pdf HR EN | 151 | |
| Horvat, D., Sever, S. | UDK 630*375.M--015.2 (234.5) : 630*377.2.001 | |
| Some Properties of the Skidders Used Mountain Forest Stand Thinning pdf HR EN | 157 | |
| Goglia, V., Horvat, D., Risović, S., Sever, S. | UDK 332.14.839.31+861.0.001 | |
| Past and the Future of the Forest Biomass Utilization in Croatia pdf HR EN | 163 | |
| Kušan, V. | UDK 630*587.001 | |
| The Approach to Remote Sensing and GIS in Croatian Forestry pdf HR EN | 171 | |
| Tomanić, S. | UDK 630*689.001 | |
| Choise of Subject of Research in Forest Operations pdf HR EN | 179 | |
| Goglia, V. | UDK 630*362.7-015.21(083.7)001 | |
| Parameters Influenting the Vibration Level of Portable Chain Saw pdf HR EN | 187 | |
| Goglia, V., Beljo, R. | UDK 630*822.34:621*935+9.02.001 | |
| Lateral Movement of the Band Saw Blade and Machine´s own Resistance Power in Relation to the Strain Force pdf HR EN | 195 | |
| Summary: In attempting to improve the band saw efficiency there is always the problem of the lateral movement of the band saw blade and of the losses due to the machine´s own resistances. The lateral movement of the band saw blade reduces both the quality of the saw surfaces, and the material yield. At the same time it requires higher energy standards. The energy losses occuring in the machine during transmission movement also increase the specific energy standards. The lateral movement of the band saw blade and the machine´s own resistances are significantly influenced by the strain force of the blade. Both, the references and the band saw producers, list a rather wide range of strain force values. In order to determine the optimum strain force value for the given machine- tool system, a very comprehensive research work was done at the Faculty of Forestry, University of Zagreb. The strain force and the rotation frequency of the driving wheel were chosen as independent variables. The approximative value of the strain force was determined by the horizontal force and the lateral displacement of the blade. The rotation frequency of the driving wheel was varied by frequency transformer. The lateral displacement value of the band saw blade was measured by inductive transducer. The machine´s own resistances power was measured by electric measuring instruments. The research will contribute to the more objective determination of the strain force of the band saw blade, which is one of the most important parameters of the band saw efficiency. Key words: band saw efficiency; blade lateral movement; machine´s own resistance power; strain force | ||
| Korpel, Š. | UDK 630*228.81+221.4.001 | |
| Development and Strukture of Beech-Fir Virgin Forests and their Application to the Selection Forest Management pdf HR EN | 203 | |