Results 21 to 30 of about 1,892,477 (294)

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

open access: yesMetals, 2020
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 ...
Xintao Zhu   +3 more
doaj   +1 more source

The Impact of Process Parameters on Surface Roughness and Dimensional Accuracy during CO2 Laser Cutting of PMMA Thin Sheets

open access: yesJournal of Manufacturing and Materials Processing, 2021
This study investigated the impact of the laser speed and power, and the position and orientation of the samples, on the average surface roughness (Ra) and dimensional accuracy (DA) during CO2 laser cutting of polymethyl methacrylate (PMMA) thin sheets ...
Konstantinos Ninikas   +2 more
doaj   +1 more source

Dispersion and dissipation error in high-order Runge-Kutta discontinuous Galerkin discretisations of the Maxwell equations [PDF]

open access: yes, 2007
Different time-stepping methods for a nodal high-order discontinuous Galerkin discretisation of the Maxwell equations are discussed. A comparison between the most popular choices of Runge-Kutta (RK) methods is made from the point of view of accuracy and ...
Botchev, M.A.   +2 more
core   +2 more sources

Accuracy of the Semi--Classical Approximation: the Pullen Edmonds Hamiltonian [PDF]

open access: yes, 1994
A test on the numerical accuracy of the semiclassical approximation as a function of the principal quantum number has been performed for the Pullen--Edmonds model, a two--dimensional, non--integrable, scaling invariant perturbation of the resonant ...
A. M. Ozorio de Almeida   +11 more
core   +2 more sources

A Comparison of Dimensional Accuracy of Addition Silicone of Different Consistencies with Two Different Spacer Designs - In-vitro Study [PDF]

open access: yesJournal of Clinical and Diagnostic Research, 2014
Introduction: Dimensional accuracy of impression materials is crucial for the production of working casts in Fixed Prosthodontics. The accurate replication of tooth preparations and their arch position requires impression materials that exhibit ...
Suprabha Rathee   +6 more
doaj   +1 more source

Influence of Printing Parameters on the Dimensional Accuracy of Concave/Convex Objects in FDM Printing

open access: yesEngineering Proceedings, 2022
Three-dimensional printing belongs to the emerging technologies of our time. An important aspect regarding the potential applications of 3D-printed objects is their dimensional accuracy.
Burhan Ekinci, Andrea Ehrmann
doaj   +1 more source

Development of a novel forming method to restrain wall curvature for stamping products using general purpose ultra-high tensile strength steel sheets

open access: yesNihon Kikai Gakkai ronbunshu, 2023
In recent years, automobile manufacturing requires both weight reduction for environmental measures and high strength for safety. For this reason, the use of ultra-high tensile strength steel sheets for frame components is increasing. For the application
Hideto KATSUMA
doaj   +1 more source

Accuracy of 3D Printed Model Acquired from Different Types of Intra Oral Scanners and 3D Printers

open access: yesJournal of Pharmacy and Bioallied Sciences
ObjectiveThe aim of this study was to verify the influence of different types of intraoral scanners and 3D printers on the accuracy of printed models in comparison to plaster models obtained from conventional impressions.
Niras Soniya   +4 more
doaj   +1 more source

Dimensional Accuracy of Electron Beam Powder Bed Fusion with Ti-6Al-4V

open access: yesDesigns, 2023
While much of additive manufacturing (AM) research is focused on microstructure, material properties, and defects, there is much less research in regards to understanding how well the part coming out of the machine matches the 3D model it is based on, as
Eric Bol, Mamidala Ramulu
doaj   +1 more source

Dimensional Accuracy in Roller Dies Drawing

open access: yesDENKI-SEIKO[ELECTRIC FURNACE STEEL], 1971
Having analyzed the influences of drawing apparatus, method and properties of materials, for improving those of the roller dies drawing, there envisioned a possible drawing of plus and minus 0.05mm tolerance through adequate countermeasurement exerted upon dimensional accuracy.
Teruo Watanabe   +4 more
openaire   +2 more sources

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