Design, Simulation and Fabication of a Coconut Dehusking Machine

Abstract

Coconut dehusking is a critical post-harvest operation in coconut processing, particularly in developing countries where the process is still largely carried out manually using machetes or spike-based tools. These traditional methods are labour-intensive, unsafe, time-consuming, and often result in damage to the coconut shell and meat. This study presents the design, simulation, and fabrication of an electrically powered coconut dehusking machine aimed at improving efficiency, safety, and product quality. The machine utilises a pair of counter-rotating roller blades that bite and tear the husk from the coconut without penetrating the shell, thereby minimising the breakage associated with conventional spike mechanisms. The design methodology involved conceptual development, component selection, and analytical calculations to determine key parameters such as coconut geometry, torque, power requirement, and gear transmission. A three-dimensional computer-aided design (CAD) model of the machine was developed and subjected to kinematic and finite element simulations to assess its operational behaviour and structural integrity before fabrication. The machine was subsequently fabricated using locally available materials and assembled into a functional prototype. Performance evaluation of the fabricated machine shows that it can dehusk approximately 200–250 coconuts per hour, with reduced labour input and improved operational safety. The results demonstrate that the developed machine is efficient, economical, and suitable for small- to medium-scale coconut processing enterprises. This work provides a practical approach to integrating design analysis, simulation, and fabrication in the development of indigenous agricultural processing equipment.