Graduate Thesis Or Dissertation
 

Experimental characterization of saw chain cutting performance

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https://ir.library.oregonstate.edu/concern/graduate_thesis_or_dissertations/pv63g266c

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  • Chainsaw users value cutting performance and safety. Knowledge of the forces exerted during sawing are necessary to understand and improve the cutting performance of saw chain. Additionally, cutting forces can be used to form metrics for evaluating performance tradeoffs when using a safety (i.e. low-kickback) saw chain versus a standard chain. The presented work investigates material and operational parameters influencing cutting forces through construction of a custom test stand and analysis using multiple linear regression. The experimental techniques are then applied in a comparison study of several commercially available low-kickback and non-low-kickback saw chains. Test methods were formed that successfully account for variations in workpiece physical properties (moisture content and density) as well as an observed cutting overload phenomenon. Maximum cut-ting efficiency was found to be governed by an operational parameter defined as the overload depth-of cut. Additionally, important interactions were observed be-tween depth-of-cut with both workpiece moisture content and density. Three different low-kickback saw chains were compared to a non-low-kickback saw chain in both nose-clear down bucking and boring cutting modes. In down bucking, the best performing low-kickback saw chain had negligible differences in cutting forces compared to the non-low-kickback saw chain. In the boring cutting mode, professional saw chain had distinctly reduced operator effort (i.e. feed force) and greater cutting efficiency than the low-kickback chains. The presented testing and analysis methods provide an experimental toolkit that can be used for evaluating the cutting performance of current saw chain offerings or to aid the development of new chain designs.
  • Keywords: chainsaw, saw chain, cutting mechanics, linear regression, cutting forces, wood cutting
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