Curve sawing effects on board dimensions when rip-sawing with a circular saw blade
| Autor: | Xiaolei Guo, Mats Ekevad, Micael Öhman, Rongrong Li |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
040101 forestry
0106 biological sciences Engineering Yield (engineering) Blade (geometry) business.industry Acoustics 04 agricultural and veterinary sciences Radius Structural engineering 01 natural sciences On board 010608 biotechnology 0401 agriculture forestry and fisheries General Materials Science business Circular saw |
| Zdroj: | Wood Material Science & Engineering. 11:135-141 |
| ISSN: | 1748-0280 1748-0272 |
| DOI: | 10.1080/17480272.2016.1150342 |
| Popis: | Curve sawing means advantages for yield and quality of sawn boards. However, for circular saw machinery deviations of saw kerfs give losses of valuable board volume. Deviations give thinner boards but also slight cupping of the cross sections. Theoretical calculations show that even with moderate (large) curve radii, these saw kerf deviations are typically 0.2–0.6 mm for normal circular saw machinery and Swedish log material. The test sawing reported here was made in order to give experimental values that can be compared to theoretical values. Fifty normal logs and 50 curved with top diameter 236–248 mm were cut with sawing pattern 3X with center boards 51 × 149 mm. The average curve radius of the curved cants that were cut in the resaw was 132 m (bow height 19 mm) and the theoretical saw kerf deviation for this radius is 0.31 mm. The experimental results show that the thickness reduction at the measuring points for curve sawn boards compared to straight sawn boards was in average 0.19 mm to be co... |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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