RANCANG BANGUN RANGKA MESIN ROASTING KOPI OTOMATIS KAPASITAS 5 KG

RANGKA

Abstract

Coffee processing roasting process technology is still limited, with processing using
traditional roasting methods. This takes a long time and the temperature cannot be regulated as
required. Therefore, roasting machine innovation is required to create a 5 kg capacity automatic
coffee roasting machine. The innovative roasting machine was designed with the quality of the
engine frame in mind.The study prepared in this report aims to complete the steps of the process
of designing, calculating and testing the framework of a 5 kg capacity coffee roaster. The design,
calculation and analysis of the frame system examines the calculation of the material, calculation
of the load, balance of labor, stress analysis, displacement, safety of the factors on the heating
chamber frame, the top cover frame, the stepping motor frame, the calculation of welded joints.
Based on the results and discussion, the frame material uses ASTM A36 steel with a square hollow
stock profile measuring (30 × 30 × 1.2) mm. Welding is done by welding the butt joint, T joint and
corner joint. The permissible stress value of the material is 176.72 N/mm2. The load on the heating
chamber is 3,920 N/mm2, on the upper frame cover 1,263 N/mm2 and on the stepper motor 4,947
N/mm2. The stress value for the frame is 47N/mm2 (Mpa), the displacement value is 0.41mm, the
safety factor value is 8.
Keywords: : Roast, Frame, Material, Test, Safety of Factor