PENGARUH KECEPATAN SPINDLE TERHADAP TINGKAT KEKASARAN PERMUKAAN HASIL PENGERJAAN FRAIS

Abstract

The roughness value on a metal surface is one of the considerations in determining the quality of a product. In some companies the level of surface roughness is very influential to produce good assembly products. The purpose of this study was to determine the effect of spindle speed on the surface roughness of the ST-70 material through the ANOVA test method and a surface roughness measurement tool (Surface Roughness Taster). For specimens in the form of a beam with dimensions of 100 mm in length, 20 mm in width and 25 mm in height. Using a spindle speed of 300 rpm, 400 rpm, and 500 rpm. Testing using the Ammitari AR-132 tool, this research was conducted at the Mechanical Technology Laboratory, Department of Mechanical Engineering, Faculty of Engineering, University of Tadulako. In the results of milling machining with spindle speeds of 300 rpm, 400 rpm, and 500 rpm with all variables outside the main variable constant, it shows that the results of the roughness test have the highest value in the milling process of 300 rpm with an average roughness of 6.063 µm, then in the milling process of 400 rpm the average roughness value is 5.352 µm, and the lowest roughness value is in the 500rpm milling process with a roughness value of 4.901 µm. Thus, the greater the value of the spindle speed used, the lower the surface roughness value of the milling process and the finer the surface of the specimen. The results of the ANOVA analysis used are Fcount <Ftable. This means that there is a difference between the average surface roughness values at spindle speeds of 300 rpm, 400 rpm and 500 rpm