scholarly journals Dimensional Accuracy of Parts Manufactured by 3D Printing for Interaction in Virtual Reality

2017 ◽  
Vol 11 (4) ◽  
pp. 279-285 ◽  
Author(s):  
Radosław Wichniarek ◽  
Filip Górski ◽  
Wiesław Kuczko ◽  
Przemysław Zawadzki ◽  
Paweł Buń
Keyword(s):  
Virtual Reality ◽  
3D Printing ◽  
Dimensional Accuracy

Results of studying the dimensional accuracy of the bases of complete removable prostheses made using 3D printing and traditional technologies

2020 ◽  
pp. 34-39
Author(s):  
Vokulova Yu.A. Vokulova ◽  
E.N. Zhulev
Keyword(s):  
3D Printing ◽  
Traditional Method ◽  
Laser Scanning ◽  
Laser Scanner ◽  
Digital Technologies ◽  
Dimensional Accuracy ◽  
3D Printer ◽  
Significance Level ◽  
Average Value ◽  
The Difference

This article presents the results of studying the dimensional accuracy of the bases of complete removable prostheses made using a 3D printer and the traditional method. Bases of complete removable prostheses were made using an intraoral laser scanner iTero Cadent (USA) and a 3D printer Asiga Max UV (Australia). To study the dimensional accuracy of the bases of complete removable prostheses, we used the DentalCAD 2.2 Valletta software. The Nonparametric Wilcoxon W-test was used for statistical analysis of the obtained data. We found that the average value of the difference with the standard for bases made using digital technologies is 0.08744±0.0484 mm. The average value of the difference with the standard for bases made by the traditional method is 0.5654±0.1611 mm. Based on these data, we concluded that the bases of complete removable prostheses made using modern digital technologies (intraoral laser scanning and 3D printer) have a higher dimensional accuracy compared to the bases of complete removable prostheses made using the traditional method with a significance level of p<0.05 (Wilcoxon's W-test=0, p=0.031). Keywords: digital technologies in dentistry, digital impressions, intraoral scanner, 3D printing, ExoCAD, complete removable dentures.

Transiting between Representation Technologies and Teaching/Learning Descriptive Geometry

2016 ◽  
pp. 250-273 ◽  
Author(s):  
Janice de Freitas Pires ◽  
Luisa Dalla Vecchia ◽  
Adriane Almeida da Silva Borda
Keyword(s):  
Virtual Reality ◽  
Augmented Reality ◽  
3D Printing ◽  
Laser Cutting ◽  
Digital Fabrication ◽  
Physical Models ◽  
Descriptive Geometry ◽  
Parametric Modelling ◽  
Digital Representation ◽  
Teaching Learning

Teaching descriptive geometry, in the context of this study, is characterized by the continuous investment in recognizing digital representation technologies which can enhance the didactic activities in architectural training. This study describes this trajectory which includes the use of virtual reality, augmented reality and parametric modelling, as well as freehand drawing and the production of physical models both by automating the unfolding process and by digital fabrication processes of 3D printing and laser cutting. In addition to questioning the relevance and sustainability of the infrastructure needed to ensure the continuation of this trajectory, the potentialities identified in each of the learning activities that have been structure, are shown. Although these potentialities are specific to this context, it is considered that this type of record contributes to understand the issues being faced in teaching practices.

Dimensional Tolerance of Casting in the Bridgman Furnace Based on 3D Printing Techniques

Metals ◽  
2020 ◽  
Vol 10 (3) ◽  
pp. 299
Author(s):  
Xintao Zhu ◽  
Fu Wang ◽  
Dexin Ma ◽  
Andreas Bührig-Polaczek
Keyword(s):  
3D Printing ◽  
Investment Casting ◽  
Systematic Approach ◽  
Low Cost ◽  
Coordinate Measuring Machine ◽  
Dimensional Accuracy ◽  
Metal Casting ◽  
Measuring Machine ◽  
Printing Techniques ◽  
Short Times

In this article, the feasibility and the dimensional accuracy based on the 3D printing technology during investment casting of non-vacuum and Bridgman furnace are investigated based on the coordinate measuring machine to calculate the dimensional tolerances through a systematic approach. The research proved that both the investigated RC solutions are effective at obtaining cast technological prototypes in short times and at low cost, with dimensional tolerances that are completely consistent with metal casting processes.

scholarly journals Design guidelines for plastic casting using 3D printing

2020 ◽  
Vol 15 ◽  
pp. 155892502091603 ◽  
Author(s):  
Paweł Zmarzły ◽  
Damian Gogolewski ◽  
Tomasz Kozior
Keyword(s):  
Surface Layer ◽  
3D Printing ◽  
Textile Industry ◽  
Dimensional Accuracy ◽  
Casting Process ◽  
Design Guidelines ◽  
Design Stage ◽  
Technological Inheritance ◽  
Finished Sample

The main aim of the presented tests was to assess the possibility of using 3D printing and casting material to produce casting molds and prototypes, especially in production of existing models. The analysis was based on the assessment of dimensional accuracy and quality of the surface layer of a finished prototype and the intermediate elements made during the production process. The mold was made using the PolyJet Matrix additive technology, and then a silicone mold was cast which was used to prepare a finished sample for testing in accordance with the design assumptions. Based on the results of metrological measurements, the phenomenon of technological inheritance in terms of error transfer in the foundry industry was evaluated. The measurements obtained suggest that in case of casting process, the hereditary features are transferred from individual casting processes, which is especially prominent in the case of surface texture quality. This confirms the occurrence of the phenomenon of the so-called technological inheritance and the need to analyze it. The results of the tests can be a guide for technologists who design molds, core boxes, and casting models, concerning the corrections (shrinkage) that need to be introduced at the design stage in order to obtain a product (casting) of satisfactory dimensional accuracy and quality of the surface layer. The result can also be useful for casting materials reinforced with glass fiber, carbon fiber, which are common materials in 3D printing and textile industry.

scholarly journals EP32.02: 3D printing and virtual reality in gynecological microanatomy and pathology using microtomography

2019 ◽  
Vol 54 (S1) ◽  
pp. 432-432
Author(s):  
P.T. Castro ◽  
H. Werner ◽  
A.P. Matos ◽  
E. Marchiori ◽  
R.T. Lopes ◽  
...  
Keyword(s):  
Virtual Reality ◽  
3D Printing
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