Optimization and Analysis of Cutting Tool Geometrical Parameters using Taguchi Method

This study presents the finite element analysis of the influence of cutting tool geometrical parameters (nose radius, rake angle and clearance angle) on machining process evaluation indicators such as cutting force, temperature and thermal deformation of the tool using Taguchi method to statistically evaluate the signal-tonoise ratio. The values of the Fz forces increased significantly as the nose radius increased. The increase in the nose radius leads to a higher Fz force with approximate value of 360-400N. The values of Fy forces were observed to have increased to about 140N as the nose radius increased. Regarding the influence of nose radius on the temperature, it was observed that the highest temperature value was obtained for a nose radius of 0.8mm, while the lowest temperature value was obtained for a nose radius of 0.4mm

Effects of Process Parameters in the Production of High Density Polyethylene-Grass Composite

This study investigates the effects of process parameters in the production of high density polyethylene-grass composite; the process parameters and their interaction on the mechanical properties of the produced high density polyethylene-grass composite were investigated using split-split plot design. The results of the calculated Fisher’s Ratio (Fcal) at significant value of 0.05 for the process parameters such as percentage by volume of material, barrel temperature, material type and their interactions ranges from -80.11 to 29.95, and were presented on ANOVA Table. The results obtained shows that these process parameters contribute significantly to the production of high density polyethylene-grass composite in polymeric industries.Keywords: High density polyethylene-Grass composite, mechanical properties, Process parameters, Split-Split Plot Desig

Barrel Temperature Effects on the Mechanical Properties of Injection Moulded Plastic Products

The study of the effect of barrel temperatures on the tensile strength, proof stress, percentage elongation and flexural modulus of injected moulded plastic products of polyvinyl chloride (PVC), polypropylene (PP) and high density polyethylene (HDPE) have been carried out. An existing mould was used for the production of tension and deflection test specimen. Then a plunger type of injection machine was used to mould test specimens at various barrel temperatures ranging from 1600C to 2800C, keeping all other process variables constant. The tensile and deflection test carried out on the specimen, The results obtained showed that the maximum tensile strength for PVC, PP, and HDPE are 6.10N/mm2, 21.67N/mm2, and 12.94N/mm2 at barrel temperature of 2700C, 2700C, 2100C; Maximum proof stress was 3.44N/mm2, 20.63N/mm2, and 13.65N/mm2 at barrel temperature of 2400C, 2500C and 1600C; Maximum percentage elongation was 281% , 172%, and 313% at barrel temperature of 2700C, 2700C, and 2300C and Maximum flexual modulus was 19.56 X102 N/mm2, 29.03 X102 N/mm2 and 27.88 X102 N/mm2 at barrel temperatures of 2400C, 2800C, and 1600C respectively.http://dx.doi.org/10.4314/njt.v34i2.1