Surface Roughness Optimization Of Machining Parameters In ...

Surface Roughness Optimization Of Machining Parameters In Machining Of Composite MaterialsThe surface roughness for the machined work pieceis measured by contact method. The instrument usedis matutoyo SJ 201.3.2 Technical dataX-axis (drive unit)Measuring range: 12.5mmMeasuring speed: 0.25, 0.5mm/s (0.25mm/s: S-type)Traversing direction: backwardsDetector range: 350µm (-200µmto+150µm)Detecting method: skid measurementMeasuring force: 4mNStylus tip: diamond, 90°/5µmRSkid radius of curvature: 40mmSkid force: less than 400mNThe machining parameters chosen for theexperiments were 1. Cutting speed, 2. Feed, 3.depthof cut.3.4 Cutting conditionsFrom the machining handbook maximumcutting speed up to which cemented carbide tool canbe used is 300m/min. the feed rate was 0.1,0.15,0.2mm/rev. depth of cut used was 0.5,1,1.5mm.Chemical composition of 2205 duplex stainlesssteelElementsCarbonManganese 2Silicon 1%composition0.03maxPhosphorous 0.03Sulphur 0.02chromium 21-23Detecting method: differential inductancePower supply: rechargeable batteryDIMENSIONS (W×D×H)Control unit: 307×165×94mmDrive unit: 115×23×26mmMASSControl unit: approx.0.3kg (SJ-201)Drive unit: 0.2kg3.3 Design of experimentsTaguchi method is a powerful tool fordesign of experiments. He developed philosophy andmethodology for continuous quality improvement inproduct and process.Factors Level1 Level2 Level3Cuttingspeed(m/min)150 200 250Feed(mm/rev) 0.1 0.15 0.2Depth of cut(mm) 0.5 1 1.5Molybdenum 2.5-3.5Nickel 4.5-6.5nitrogen 0.08-0.2copper3.5 Experimental procedureNilThe work piece was first fixed in the chuckof the cnc machine. The length of work piece is110mm in which the 40mm was used for holding onthe chuck. The remaining length (i.e.) 60mm wasused for machining. The cutting tool was allowed toslightly touch the right side of the work piecematerial and the coordinates of the start of the workpiece were set on the cnc lathe. The cutting tool wasthen allowed to slightly touch the surface of the workpiece material, and the diameter of the work piecewas set in the cnc lathe. Then machining was carriedout in different cutting condition, totally there were27 cutting conditions (i.e.) with constant cuttingspeed and feed we varied the depth of cut. Similarlymachining was carried out in all the work pieces.After machining the surface roughness of the workpiece at different cutting conditions were measuredusing Mitutoyo SJ201.the chip produces during eachcutting condition was collected and chip analysis wascarried out.International Journal of Applied Research in Mechanical Engineering, Volume-1, Issue-1, 201129