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Assessment of surface waviness of casting patterns made using 3D printing technologies

Zmarzły Paweł, Gogolewski Damian, Kozior Tomasz

Bulletin of the Polish Academy of Sciences. Technical Sciences

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2023

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Vol. 71, nr 1

art. no. e144585

EN

The application of 3D printers significantly improves the process of producing foundry patterns in comparison to traditional methods of their production. It should be noted that the quality of the surface texture of the foundry pattern is crucial because it affects the quality of the casting mold and eventually the finished casting. In most studies, the surface texture is examined by analyzing the 2D or 3D roughness parameters. This is a certain limitation because, in the case of 3D printing, the influence of technological parameters is more visible for irregularities of a longer range, such as surface waviness. In the paper, the influence of the 3D printing layer thickness on the formation of waviness of the surface of casting patterns was analyzed. Three 3D printers, differing in terms of printing technology and printing material, were tested: PJM (PolyJet Matrix), FDM (fused deposition modeling) and SLS (selective laser sintering). In addition, the surface waviness of patterns manufactured with traditional methods was analyzed. Surface waviness has been measured using the Form Talysurf PGI 1200 measuring system. Preliminary results of the research showed that the layer thickness significantly influences the values of waviness parameters of the surface in the casting patterns made with FDM, PJM and SLS additive technologies. The research results indicated that the smallest surface waviness as defined by parameters Wa, Wq and Wt was obtained for patterns printed using the PJM technology, while the highest was noted when using the FDM technology.

2

Profilometria laserowa w badaniach kamiennych elementów budowlanych poddanych obróbce mechanicznej i termicznej

Rembiś Marek, Kośla Maria

Przegląd Geologiczny

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2021

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Vol. 69, nr 2

120--126

EN

The investigation was carried out on stone slabs sawn and flamed from three commercial types of igneous rocks: the “Sunny Desert” granite, “Twilight” basalt and “Imperial Red” granite. With the following method of laser profilometry, 510 surface profiles were recorded, each of them containing 1280 measuring points. The parameters of roughness and waviness were calculated for each stone surface with a horizontal measurement accuracy of 1 mmandaverticaloneof10mm. The data of laser profiling were correlated with petrographic observations in order to identify the rock components that are most exposed to damage while preparing the stone slabs. The results indicate that the thermally treated slabs have their surface roughness distinctly higher and their waviness higher even several times than the slabs obtained by sawing. Among the three flamed slabs, the highest roughness is revealed by the medium-crystalline “Sunny Desert” granite, while in case of the cut ones - by the unequally crystalline “‘Imperial Red” granite. The waviness of the surfaces obtained by slab cutting and flaming is comparable in both investigated granite types. The “Twilight” basalt, which shows the porphyritic-aphanitic texture and the directional arrangement of its mineral components, reveals the lowest values of all the parameters analysed.

3

Pomiar falistości powierzchni w procesie szlifowania wgłębnego

Burek J., Kubik P., Babiarz R., Sułkowicz P.

Mechanik

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2018

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R. 91, nr 10

853--855

PL

Przedstawiono metodę pomiaru falistości powierzchni cylindrycznej podczas szlifowania w czasie rzeczywistym. W układzie pomiarowym zastosowano trzy czujniki indukcyjne. To umożliwia matematyczną analizę danych, eliminującą wpływ drgań przedmiotu obrabianego na wynik pomiaru.

EN

A method for measure a cylindrical surface waviness during grinding online has been presented. Three inductive sensors have been used in the measurement system. Thanks for that possible is mathematical data analyse which exclude a vibration influence on a measure waviness value.

4

Porównanie cech chropowatości żeliw po obróbce tokarskiej

Miko E., Skrzyniarz M.

Mechanik

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2015

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R. 88, nr 8-9CD2

724--732

PL

Przedstawiono wpływ poszczególnych warunków obróbki na chropowatość i falistość żeliw sferoidalnych (EN-GJS-400, EN-GJS-500, EN-GJS-600), żeliwa chromowo-molibdenowego (SIMO 5.1) oraz żeliwa szarego (EN GJL-250) po obróbce tokarskiej.

EN

The study presents the impact of individual treatment conditions on the roughness and waviness of ductile cast irons (EN-GJS-400, EN-GJS-500, EN-GJS-600), chromium-molybdenum cast iron (SIMO 5.1), and grey cast iron (EN GJL-250) after turning.

5

Struktura geometryczna powierzchni

Krzos J.

Obróbka Metalu

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2012

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nr 1

56-65

PL

Rzeczywista powierzchnia obrobionych części maszyn charakteryzuje się bardzo złożoną budową. Podstawowymi elementami tej powierzchni jest chropowatość, falistość, błędy kształtu i wady powierzchniowe. Wszystkie te elementy rozpatrywane łącznie, nazywane są strukturą geometryczną powierzchni (SGP).