International Research Journal of Engineering and Technology (IRJET) Volume: 09 Issue: 04 | Apr 2022
www.irjet.net
e-ISSN: 2395-0056 p-ISSN: 2395-0072
Quality Improvement of the 3D Print Using Design of Experiments Er. Sandeep Chowdhry1 1Engineering
Consultant & Trainer, Chandigarh, India
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Abstract – The 3D printing technology is being intensively
height increases print time. Whereas [7] research finding states that the printing time is reduced with increased layer height. This study aims to find (1) whether there is a linear or non-linear relationship between the print speed and the print time and (2) how the layer height and print time are related. These research findings will contribute to the literature on optimising the process parameters to improve the quality of the 3D print.
used to build functional prototypes of the new product for demonstration and testing. However, the default settings of the 3D printer process parameters set by the manufacturer, in some cases, do not provide the required quality for the 3D print. In addition, the conflicting research findings of the same 3D print process parameter may lead to more confusion in selecting optimum settings. This study aims to determine the effect of print speed and layer height on the printing time of the ABS Plus 3D print. Design of Experiment (DOE) is used to analyze the data. The result findings show a non-linear relationship between the printing time and the print speed. It is concluded that for the print speed between 20 mm/s to 67.88 mm/s the printing time decreases with the print speed increase and the layer height. For the print speed between 67.88 mm/s to 80 mm/s, printing time increases with print speed and the decrease in the layer height.
2 METHODOLOGIES 2.1 Material The CAD file of the 3D print model is made using the Autodesk Inventor Professional 2016. The specimen is made of ABS Plus material. The material has an operating temperature between 220 °C to 260 °C.
Key Words: 3D printing, DOE, RSM., Rapid Prototyping, FDM, Layer Manufacturing
1. INTRODUCTION In the Rapid Prototyping (RP) machine, the computeraided design (CAD) file is sliced into a series of 2D CAD files that represent the cross-section of the part [1,2]. The 3D printer extrusion head moves accurately along the profile of each cross-section of the region, depositing a layer of molten thermoplastic filament over it. The worktable is then lowered by a layer height [3]. Each layer is built on the preceding layer until the 3D physical model is created. Therefore, layer height and print speed are two important process parameters that help produce high-quality 3D prints. The incorrect layer height settings may result in overhangs of sagging sections in 3D print [4]. Similarly, incorrect print speed settings may lead to insufficient bed adhesion of the 3D print, print layer separation or wrapping within the 3D print, shifting layers or leaning prints, sagging sections in the prints, and weak infill’s [4]. The RP technology can be successfully implemented by improving the surface quality, part strength, build time, accuracy and repeatability of the 3D prints [5,6]. Therefore, one expects that the research findings of the same 3D print process parameter will be similar. Otherwise, the user will lack confidence in adopting the RP technology. However, the previous studies showed conflicting research findings for the layer height and the print time. For instance, [3] research findings concluded that an increase in layer
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Fig - 1: Specimen part model 2.2 Equipment a. b. c. d.
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Creality3D Ender-3 printer settings used. Autodesk Inventor Professional 2016. Cura engine [8]. Minitab 2019 software.
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