Akademik Veri Yönetim Sistemi
Gumushane Universitesi Fen Bilimleri Dergisi, cilt.12, sa.4, ss.1046-1057, 2022 (Scopus, TRDizin)
Part dimensional form errors are among the main problems in additive manufacturing. Part dimensional form errors due to device position errors, part shrinkage, and STL file errors negatively affect productivity. In general, different dimensional form errors may occur in parts according to each device-material-manufacturing parameter-geometry combination. Therefore, the calculation and analysis of these errors is of great importance for end users and device manufacturers. With this scope, in this study, part dimensional form errors were investigated in the manufacturing of parts using ABS material with the Zaxe Z1 device which is an industrial three-dimensional printer. First, a test part accommodating different sizes of circle, square and equilateral triangle geometries was designed. Then, in order to examine the errors that occur according to the position of the test parts on the building platform, a total of 5 test parts were positioned in different regions of the building platform and manufactured. In the third step, all the test geometries on these test parts were scanned with a coordinate measuring machine and their two-dimensional profiles were obtained. In the fourth step, geometry fitting was performed to the scanned profiles with the least squares-based geometry fitting algorithm. Finally, the profile tolerance values between the fitted and designed geometries were calculated. When the results are analyzed, it has been seen that the profile tolerance values vary depending on the location in the building platform and geometry, and all the manufactured geometries are smaller than their designed dimensions. In other words, all the geometries were subjected to shrinkage. Generally speaking, there is an increase in the profile tolerance values as the geometry size increases. The average profile tolerance value for all the geometries was calculated as 0.1987 mm. By offsetting the scanning paths by half of this value, i.e., ≈+0.1 mm, more precise geometries can be obtained.