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Problems of determination of MultiJet 3D printing distortions using a 3D scanner

Nowacki J., Sieczkiewicz N.

Archives of Materials Science and Engineering

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2020

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Vol. 103, nr 1

30--41

EN

Purpose: Analysis and the review of 3D scanning methods, methods of combining 3D scans and tables available on the market (rotary, tilt and turn) as non-destructive testing systems of polymer materials. As the problem of deformation testing of elements produced by 3D printing is relatively novel, so far a small number of publications on this subject have been observed in terms of current solutions in the area of methodology and devices. Design/methodology/approach: 3D print samples have been prepared using MultiJet Printing (MJP), also called PolyJet Printing. The first sample was left in a UV oven and the second one in a dark cabinet, without access to sunlight (standard conditions 23/50 as described in ISO 554:1976). Non-contact structured blue light 3D metrology grade scanner was used to capture the entire part geometry for inspection. A comparison of subsequent scans after postcuring with reference scans after printing can indicate dimensional changes. The resulting scans are detailed enough to monitor shape and size changes over time. Findings: Universal 3D printing model beneficial in distortion analysis has been proposed. The method of evaluating 3D print distortions was verified using a metrology class 3D scanner. The results of this study show that deformations are declining through time to near the same values, the only difference is the rate of change of dimensions. Practical implications: Due to popularity and lower cost of polymer 3D printing, in comparison to metal 3D printing, an initial attempt to analyse the distortion of the locally melted substrate was done using MultiJet 3D printing with photopolymer material. The universal 3D print test part was proposed for verification of 3D printing deformations. Finally, the framework for the determination of 3D printing distortions is presented, taking into account the influence of UV postcuring. Originality/value: Analysis of a method to measure 3D printing distortions using a metrology grade 3D scanner is presented in the paper. Recently, this matter is becoming more and more important because many prototypes are increasingly produced by 3D printing and 3D printing distortions may cause many difficulties during the manufacturing and assembly process.

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Wykorzystanie technologii skanowania 3D w przedsiębiorstwach produkcyjnych z rejonu Podbeskidzia

Wyród-Wróbel J.

Logistyka

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2012

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nr 5

XX

The article presents the results of the survey on the use of 3D scanning technology in industrial enterprises from the south region of Silesia. The possibilities of using this technology both in manufacturing, services and everyday life are presented here.

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Case study of virtual reconstruction of the Wkryujście Altar based on the structured light projection

Specjalny B., Mantiuk R.

Metody Informatyki Stosowanej

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2010

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nr 1 (22)

163-173

EN

In this paper we present case study of virtual reconstruction of the Wkryujście Altar, one of the greatest cultural heritage both Polish and German nations in West Pomeranian region in Poland. We analyze main strategies of recovering of the 3D shape of a physical object and recommend the structured light projection technique as the most suitable for the Altar. By illuminating the surface with images consisting of a light pattern, the correspondence between projector and camera pixels can be uniquely identified. Recovering transformations of the pattern pixel, it is possible to capture a 3-D point on the surface of an object. The structured light projection technique doesn’t require expensive hardware and satisfactory results can be achieved using off-the-shelf equipment. We built basic form of the structured light hardware setup and conducted a case study of measurement fidelity. The achieved results are presented in the paper together with discussion of using structured light projection to reconstruct cultural heritage objects.

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Rekonstrukcja geometrii obiektów przestrzennych przy zredukowanej ilości danych pomiarowych

Rychlik M.

Eksploatacja i Niezawodność

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2004

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nr 2

45-49

PL

Budowa trójwymiarowych modeli używanych w systemach CAx, wymaga precyzyjnych danych geometrycznych. W zależności od aplikacji, konieczne jest pozyskanie (oprócz danych geometrycznych) dodatkowych danych takich jak: gęstość, tekstura powierzchni, itp. Autor prezentuje metody rekonstrukcji trójwymiarowych modeli w programach CAD i przedstawia koncepcją praktycznego zastosowania POD (Proper Orthogonal Decomposition). Trójwymiarowa rekonstrukcja POD bazuje na modach statystycznych opisujących obiekt 3D.

EN

The construction of three-dimensional models used in CAx systems, to require precision geometrical data of the real object is presented. Depending on application, it is necessary to obtain (besides geometrical dimensions) additional data such as: volume density, texture of the surface, etc. Author shows method of reconstruction 3D models in CAD software and presents conception of practicable Proper Orthogonal Decomposition (POD). The POD 3D reconstruction bases on the statistical modes which describe the 3D object.