Predictive Analysis And Optimization Effect of Altitude Carbide Insert On Turning Process Toward Surface Roughness On Sliding Bearings Material (Bronze)


World Industries and Small and Medium Enterprises (SMEs) are being encouraged by the government to be able to competitiveness. It means that innovation, efficiency, and productivity are compulsory to be achieved at any time. On the other hand, buying high-tech machines such as CNC Lathe machine requires no small cost. Material Bronze is one type of material that is often used as spare parts sliding bearings (Bush). This study innovates by making a breakthrough. The carbide inserts CCMT09T304 type used on CNC lathes will be applied for use on conventional lathes in making sliding bearings. The carbide insert with Speed Cutting technology is the ability of a greater meaning will enable Bronze material slashed /processed at a higher rotation speed and a larger burial will produce products with a better time. This research is to obtain machining parameters such as spindle speed rotation (Rpm), feedings (mm / rotation) and tools height position above the center (mm). The method used is the experimental method. Preparation of specimens was performed with the Taguchi approach, independent variables were height position tools (mm), spindle speed rotation (Rpm), feedings (mm / rotation), the control variable is the depth of cut 0.5 mm. The testing process includes testing of surface roughness (Ra), tools temperature scale (°C), machine power consumption (Watts) and the engine vibration (Hz). Outcomes to be achieved are in the form of standard machining parameters, the standard height of the tool. The best surface roughness is obtained on 4th experimental results with Ra = 1.55 (N6) is achieved in experiments with a height of tool 0.2 mm above the center, 755 rpm spindle speed and 0.15 mm / rotation feeding. The lowest temperature obtained in the 4th experiment of 30.3 °C. Lower engine vibration obtained at 15.2 Hz occurred in experiments 1st, 4th, and 7th. The Smallest Power consumption obtained at 425 Watts occurred in 7th experiments. Keywords: CCMT tools, machining parameters, surface roughness.