OBRABOTKAMETALLOV Vol. 23 No. 3 2021 MATERIAL SCIENCE EQUIPMENT. INSTRUMENTS 6 4 4 а b c d e f Fig. 11. Technological process of TE manufacturing: a – master model; b – wax model; c – metal casting with SFS; d – TE; e – TE with fi xing; f – mating profi le of groove surface after CPEDM Ta b l e 7 Comparative table of measurement results Dimensions (mm) Roughness (μm) Sides 1–2 Sides 3–4 Sides 1–2 Sides 3–4 CAD model 29-0.13 8-0.09 Ra 1.6 Ra 1.6 Metal casting 28.90 7.98 Ra 1.6 Ra 1.6 2. Analysis of shape deviations has shown that errors occur when manufacturing a master model using stereolithography. 3. An experimental study of the shape deviation of the master model has shown a surface concavity in the range from 0.03 to 0.07 mm depending on the location of the sides. 4. It is shown that the optimized master model has 25 % fewer shape deviations.
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