OPTIMIZATION OF COLD ROLLING MACHINE WITH 25, 5, AND 3 WRAPS BLOW OFF PROCESS BY CALCULATING THE PERCENTAGE OF THE YIELD

Abstract

Rolling Mills is the one of the methods in the processing material to reduce the thickness and the width of the material. There are two processes in rolling mills, hot rolling process and cold rolling process. Hot rolling is the process where the material is heated above the room and recrystallization temperature, whereas the cold rolling process is below or same as the room and recrystallization temperature. By using the cold rolling mills machine, the process of the hot rolled coil will be process for produce the material of cold rolling steels. The material will be rolled to reduce the thickness and the width of the material. In the machine there are several products who have defectives, the most defective that will be avoid emulsion stain. The machine’s process can be setup to set when the machine will blow off to reduce the emulsion stain in the products. 25 wraps, 5 wraps, and 3 wraps are the experiments to test which one is less producing the emulsion stain. By calculating the total yield and the emulsion stain percentages. To find the total yield, divide the mass of the material after the process and the mass of the material before the process. For the emulsion stain percentage, divide the material that have defect and total of the material. Between the three samples, 5 wraps process is the less process that produce emulsion stain. And the most who produce the emulsion stain is the 25 wraps.