Analisis Kekuatan Mata Pisau Mesin Huller Kopi Menggunakan Metode Elemen Hingga

Abstract

A coffee huller machine is a device designed to separate the skin from the beans. One critical component in this process is the knife blade, which is key in separating the husk from the seeds. Using a blade that does not meet specifications can cause misalignment and displacement of the blade components. Material selection is important in designing this component, aiming to find materials with suitable properties and economic value. Previous research has identified mild steel, stainless steel 304, and cast iron as potential coffee skin peeler blade materials. This study aims to determine the strength of the blade components made from each material in coffee huller machines using a simulation process with the finite element method in Autodesk Inventor Nastran software. The results of the static structural simulation analysis of the coffee huller machine knife component, in terms of material strength (Von Mises stress, displacement, and factor of safety), indicate that the recommended materials in terms of mechanical strength are (1) mild steel, (2) stainless steel 304, and (3) nodular cast iron. Mild steel was chosen for its optimal simulation results compared to the other materials, with a Von Mises Stress value of 117.3MPa, displacement of 7.09 x 10-3 mm, and Safety Factor of 2.807.