Force Relations and Dynamics of Cutting Knife in a Vertical Disc Mobile Wood Chipper
Journal Title: Leonardo Electronic Journal of Practices and Technologies - Year 2011, Vol 10, Issue 18
Abstract
The force relations and dynamics of cutting knife in a vertical disc wood chipper were investigated. The tool geometry determined include: rake angle (20º); Shear angle, (f= 52.15º); the mean frictional angle, (t = 5.71º). The analysis and comparison of the cutting forces has shown that the chips separated from the wood are being formed by off cutting, since normal applied force N is compressive in nature, the magnitude of the forces used by the knife on the wood is expected to increase as the cutting edge of the knife goes deeper into the wood until the value of the resisting force acting against the cut wood Ff is reached and exceeded. The evaluated forces acting on the knife and the chip are: F = 3.63Nmm-1; N = 34.7 Nmm-1; Fs= 27.45Nmm-1; Fn =31.92 Nmm-1; Ft = -8.46Nmm-1; Fc = 33.85Nmm-1. The resultant force acting on the tool face, Pr = 34.89Nmm-1. The specific cutting pressure, Pc and cutting force needed to cut the timber, Fc, are 1.79 × 106 N/m2 and 644.84N respectively. The energy consumed in removing a unit volume of material is 69.96kJ/mm-3 and the maximum power developed in cutting the chip is 3591.77W (4.82hp). The chipper efficiency (86.6%) was evaluated by the highest percentage of accepted chip sizes.
Authors and Affiliations
BELLO Segun, ONILUDE Musiliu
Keywords
Related Articles
- EP ID EP145101
- DOI -
- Views 109
- Downloads 0
Method of DNA Analysis Using the Estimation of the Algorithmic Complexity
The computational approach has a major impact in current biomolecular research. The computation of the algorithmic complexity (Kolmogorov) is a recently introduced method of global analysis for DNA sequences. The complex...
E-learning
E-learning means learning via electronic means and is therefore an all-embracing term covering learning via an electronic device. The "expectations" and "realities" for each of the delivery mechanisms within the electron...
Implementation of the Extended Conjugate Gradient Method for the Two-Dimensional Energized Wave Equation
The paper computes the optimal control and state of the two-dimensional Energized wave equation using the Extended Conjugate gradient Method (ECGM). This piece of work has to do with all the vital computational elements...
Design and Construction of a Remote Controlled Fan Regulator
The paper presents a simple design and implementation of a remote controlled fan regulator. It enables the user to operate a fan regulator from approximately 10 meters away. The remote transmits a tone using an infrared...
Adaptive Neuro-Fuzzy Inference System based DVR Controller Design
PI controller is very common in the control of DVRs. However, one disadvantage of this conventional controller is its inability to still working well under a wider range of operating conditions. So, as a solution fuzzy c...