Optimization the process parameter of FDM 3D ...

Optimization the process parameter of FDM 3D printer using Taguchi method for improving the tensile strength

Author Name : Mahesh Saini

ABSTRACT:  FDM is the three – dimensional or “ Additive Manufacturing ” process. FDM directly fabricated the 3D product from computer aided design ( CAD ) software. The quality of FDM manufacture 3D parts depend on the several process parameters like raster angle, layer thickness, temperature, infill density, shell thickness, air gap etc. among these parameters material, temperature and infill density most significant for improve the tensile strength of product. So this work focus on enhance the tensile strength FDM 3D printer manufacture product by optimizing the three parameters such as infill density, material and temperature at 3 level using Taguchi method. Acrylonitrile Butadiene styrene (ABS) material, Polyethylene Terephthalate Glycol (PETG) material and bi- material (combination of 50% ABS and 50% PETG ) material is used for fabricated the ASTM D638 type iv testing specimen. The variable parameter such as infill density, temperature and material density varies 30% to 50%, 2200c to 2600c and 1.04 kg/m3 to 1.23 kg/m3 respectively. The tensile strength of these specimen have been tested using UNITEK 94100 UTM machine. The five test have been performed on each specimen. We find the PEGT material at 40% infill density and 2400c having more strength that is 39.5 Mpa. Taguchi ‟s 33 design of experiment for orthogonal array L9 is used for optimization the parameters. Finally conclude the infill density is most influence factor for enhance the tensile strength instead temperature. Tensile strength increase with the infill density up to 40% beyond the this limit its decrease with increase the infill density.