Welding Technology in Additive Manufacturing Processes of 3D Objects

2017 ◽  
Vol 906 ◽  
pp. 121-130 ◽  
Author(s):  
V. Korzhyk ◽  
V. Khaskin ◽  
O. Voitenko ◽  
Volodymyr Sydorets ◽  
O. Dolianovskaia
Keyword(s):  
Additive Manufacturing ◽  
Three Dimensional ◽  
Simultaneous Increase ◽  
Manufacturing Cost ◽  
Three Dimensional Objects ◽  
3D Objects ◽  
Input Quality ◽  
Welding Technology ◽  
Metal Volume ◽  
Increase In Productivity

Using of welding technologies to produce metal volume objects allows considerable lowering of their manufacturing cost at simultaneous increase in productivity, compared to SLS-and SLM-processes. The most perspective welding technology of additive manufacturing of three-dimensional objects is plasma-arc technology with application of wires or powders. It allows creating at comparatively low heat input quality volumetric products with wall thickness from 3 to 50 mm from alloys based on Fe, Ni, Co, Cu, Ti, Al, as well as composite materials, containing refractory components.

scholarly journals Research and development of decision-making methods for creating 3d objects in mechanical engineering

2018 ◽  
Vol 224 ◽  
pp. 02002
Author(s):  
Alan Kumaritov ◽  
Ekaterina Sokolova
Keyword(s):  
Decision Making ◽  
Research And Development ◽  
Mechanical Engineering ◽  
Three Dimensional ◽  
Absolute Truth ◽  
Three Dimensional Objects ◽  
3D Objects ◽  
Truth Value

The analysis of the criterion of integral proximity of a clear / fuzzy truth value to the value of absolute truth is carried out in this work. Confirmation of the possibility of using algorithms to create three-dimensional objects in engineering.

Three-Dimensional Object Realization via Direct Volumetric Activation

2017 ◽  
Author(s):  
Andrew J. Birnbaum ◽  
Athanasios P. Iliopoulos ◽  
John C. Steuben ◽  
John G. Michopoulos
Keyword(s):  
Additive Manufacturing ◽  
Capital Investment ◽  
Three Dimensional ◽  
Scaling Behavior ◽  
Maintenance Costs ◽  
Three Dimensional Objects ◽  
Geometric Deviation ◽  
Manufacturing Techniques ◽  
Dimensional Object ◽  
Current Systems

Despite increasing levels of acceptance, traditional additive manufacturing techniques continue to suffer from a number of fundamental drawbacks that act to limit broad adoption. These drawbacks include limits on processable materials, part properties/performance, geometric deviation and repeatability. The vast majority of existing processes also rely on a point-by-point approach to generate parts, resulting in exceedingly long build times and extremely poor scaling behavior. Furthermore, in general, current systems require significant levels of complexity for operation, resulting in the need for considerable upfront capital investment as well as continuing maintenance costs. A new manufacturing approach is presented here, based upon the generation of objects from the direct creation of constituent volumetric sub-regions. This process addresses many of the limitations described above, and has the potential to significantly alter the manner with which three-dimensional objects are realized.

Customizing Food with an Additive Manufacturing Technology

2012 ◽  
Vol 713 ◽  
pp. 43-48
Author(s):  
L. Serenó ◽  
J. Delgado ◽  
Joaquim de Ciurana
Keyword(s):  
Additive Manufacturing ◽  
Process Parameters ◽  
Three Dimensional ◽  
Manufacturing Technology ◽  
Manufacturing Costs ◽  
Three Dimensional Objects ◽  
Additive Manufacturing Technology ◽  
Qualified Personnel ◽  
Broad Variety ◽  
Traditional Technologies

The development of open Additive Manufacturing (AM) technologies, such as the Fab@Home system, has emerged as a freeform approach capable of producing complex three-dimensional objects with a broad variety of materials. The main objective of this work is to analyze and optimize the manufacturing capacity of this system when producing 3D edible objects. A new heated syringe deposition tool was developed and several process parameters were optimized to adapt this technology to consumers needs. The results revealed in this study show the potential of this system to produce customized edible objects without qualified personnel knowledge, therefore saving manufacturing costs compared to traditional technologies.

scholarly journals Design and Development of Plastic Filament Extruder for 3D Printing

2018 ◽  
Vol 10 (3) ◽  
pp. 23 ◽  
Author(s):  
Mamta H. Wankhade ◽  
Satish G. Bahaley
Keyword(s):  
Additive Manufacturing ◽  
3D Printing ◽  
Three Dimensional ◽  
3D Printer ◽  
3D Objects ◽  
Fused Deposition ◽  
Additive Manufacturing Technology ◽  
Mechanized Method ◽  
Dimensional Object ◽  
The Cost

<p>3D printing is a form of additive manufacturing technology where a three dimensional object is created by laying down successive layers of material. It is mechanized method whereby 3D objects are quickly made on a reasonably sized machine connected to a computer containing blueprints for the object. As 3D printing is growing fast and giving a boost to product development, the factories doing 3D printing need to continuously meet the printing requirements and maintain an adequate amount of inventory of the filament. As the manufactures have to buy these filaments from various vendors, the cost of 3D printing increases. To overcome the problem faced by the manufacturers, small workshop owners, the need of 3D filament making machine arises. This project focuses on designing and fabricating a portable fused deposition 3D printer filament making machine with cheap and easily available components to draw 1.75 mm diameter ABS filament.</p>

scholarly journals A pilot study on the use of 3D printers in veterinary medicine

2021 ◽  
Vol 14 (3) ◽  
pp. 159-164
Author(s):  
Leonardo Leonardi ◽  
◽  
Roberto Marsili ◽  
Enrico Bellezza ◽  
Giovanni Angeli ◽  
...  
Keyword(s):  
Additive Manufacturing ◽  
3D Printing ◽  
Bone Tissue ◽  
Three Dimensional ◽  
The Body ◽  
Porous Scaffolds ◽  
Layer By Layer ◽  
Three Dimensional Objects ◽  
Cellular Attachment

Additive manufacturing (AM) is the process of joining materials to create layer-by-layer three-dimensional objects using a 3D printer from a digital model. The great advantage of Additive Manufacturing is to allow a freer design than traditional processes. The development of additive manufacturing processes has permitted to optimize the production of the customized product through the modeling of the geometry and the knowledge of the morphometric parameters of the body structures. 3D printing has revolutionized the field of Regenerative Medicine because, starting from computerized tomography (CT) images and using traditional materials such as plastic and metals, it can provide customized prostheses for each patient, which adapt perfectly to the needs of the subject and act as structures support. 3D printing allows you to print three-dimensional porous scaffolds with a precise shape and chemical composition suitable for medical and veterinary use. Some of these scaffolds are biodegradable and appear to be ideal for bone tissue engineering. In fact, they are able to simulate extracellular matrix properties that allow mechanical support, favoring mechanical interactions and providing a model for cellular attachment and in vivo stimulation of bone tissue formation.

scholarly journals Stereolithographic Additive Manufacturing of Zirconia Electrodes with Dendritic Patterns for Aluminum Smelting

2021 ◽  
Vol 11 (17) ◽  
pp. 8168
Author(s):  
Masaya Takahashi ◽  
Soshu Kirihara
Keyword(s):  
Additive Manufacturing ◽  
Three Dimensional ◽  
Uv Laser ◽  
Spatial Profile ◽  
Molten Salt Electrolysis ◽  
3D Objects ◽  
Photosensitive Resin ◽  
Aluminum Smelting ◽  
Computational Fluid Dynamics Cfd ◽  
Dendritic Structures

Zirconia electrodes with dendritic patterns were fabricated by stereolithographic additive manufacturing (STL-AM). A solid electrolyte of yttria-stabilized zirconia (YSZ) was selected for oxygen separation in the molten salt electrolysis of aluminum smelting without carbon dioxide excretion. Thereafter, 4, 6, 8 and 12-coordinated dendritic structures composed of cylindrical lattices were designed as computer graphics. The specific surface area of each structure was maximized by changing the aspect ratio. The spatial profile and surface pressure of the hot liquid propagation in the dendrite patterns were systematically visualized by computational fluid dynamics (CFD). During the fabrication process, a photosensitive resin containing zirconia particles was spread on a substrate, and an ultraviolet (UV) laser beam was scanned to create a two-dimensional (2D) cross-section. Through layer laminations, three-dimensional (3D) objects with dendritic structures were successfully fabricated. The ceramics were obtained through dewaxing and sintering.

scholarly journals Predicting precision grip grasp locations on three-dimensional objects

2018 ◽  
Author(s):  
Lina K. Klein ◽  
Guido Maiello ◽  
Vivian C. Paulun ◽  
Roland W. Fleming
Keyword(s):  
Mass Distribution ◽  
Precision Grip ◽  
Three Dimensional ◽  
Behavioral Data ◽  
Three Dimensional Objects ◽  
3D Objects ◽  
Contact Points ◽  
Potential Contact ◽  
3D Printed ◽  
Precision Grasping

AbstractWe rarely experience difficulty picking up objects, yet of all potential contact points on the surface, only a small proportion yield effective grasps. Here, we present extensive behavioral data alongside a normative model that correctly predicts human precision grasping of unfamiliar 3D objects. We tracked participants’ forefinger and thumb as they picked up objects of 10 wood and brass cubes configured to tease apart effects of shape, weight, orientation, and mass distribution. Grasps were highly systematic and consistent across repetitions and participants. We employed these data to construct a model which combines five cost functions related to force closure, torque, natural grasp axis, grasp aperture, and visibility. Even without free parameters, the model predicts individual grasps almost as well as different individuals predict one another’s, but fitting weights reveals the relative importance of the different constraints. The model also accurately predicts human grasps on novel 3D-printed objects with more naturalistic geometries and is robust to perturbations in its key parameters. Together, the findings provide a unified account of how we successfully grasp objects of different 3D shape, orientation, mass, and mass distribution.Author SummaryA model based on extensive behavioral data unifies the varied and fragmented literature on human grasp selection by correctly predicting human grasps across a wide variety of conditions.

scholarly journals The Exploitation of Polymer Based Nanocomposites for Additive Manufacturing: A Prospective Review

2019 ◽  
Vol 890 ◽  
pp. 113-145
Author(s):  
Imran Khan ◽  
Christina S. Kamma-Lorger ◽  
Saeed D. Mohan ◽  
Artur Mateus ◽  
Geoffrey R. Mitchell
Keyword(s):  
Additive Manufacturing ◽  
Fused Deposition Modeling ◽  
Plastic Material ◽  
Selective Laser Sintering ◽  
Three Dimensional ◽  
Three Dimensional Objects ◽  
Fused Deposition ◽  
Metal Ceramic ◽  
Deposition Modeling ◽  
Manufacturing Applications

Additive manufacturing (AM) is a well-known technology for making real three dimensional objects, based on metal, ceramic and plastic material used for various applications. The aim of this review is to explore and offer an insight in to the state of the art polymer based nanocomposites in to additive manufacturing applications. In context to this, the developing efforts and trends in nanocomposites development particularly for additive manufacturing processes were studied and summed up. The scope and limitations of nanocomposites into Stereolithography, selective laser sintering and fused deposition modeling was explored and highlighted. The review highlights widely accepted nanoparticles for range of applications including mechanical, electrical, flame retardance and crossing over into more biological with the use of polymer matrices. Acquisition of functional parts with limitations in regard to printing is highlighted. Overall, the review highlights successes, limitations and opportunities that the union of AM and polymer based nanocomposites can bring to science and technology.

A new methodology for design and manufacturing of a customized silicone partial foot prosthesis using indirect additive manufacturing

2019 ◽  
Vol 42 (11) ◽  
pp. 645-657 ◽  
Author(s):  
Osama Abdelaal ◽  
Saied Darwish ◽  
Khaled Abd Elmougoud ◽  
Saleh Aldahash
Keyword(s):  
Additive Manufacturing ◽  
Computer Aided Design ◽  
Three Dimensional ◽  
Design Data ◽  
Three Dimensional Objects ◽  
Design And Manufacturing ◽  
Manufacturing Procedure ◽  
Manufacturing Techniques ◽  
Aided Design ◽  
Partial Foot Amputation

The production of customized prostheses for the foot and ankle still relies on slow and laborious steps of the traditional plaster molding fabrication techniques. Additive manufacturing techniques where three-dimensional objects can be constructed directly based on the object’s computer-aided-design data in a layerwise manner has opened the door to new opportunities for manufacturing of novel and personalized medical devices. The purpose of the present study was to develop a new methodology for design and manufacturing of a customized silicone partial foot prosthesis via an indirect additive manufacturing process. Furthermore, the biomechanics of gait of a subject with partial foot amputation wearing the custom silicone foot prosthesis manufactured by the indirect additive manufacturing was characterized, in comparison with a matched healthy participant. This study has confirmed the possibility of producing silicone partial foot prosthesis by indirect additive manufacturing procedure. The amputated subject reported total comfort using the custom prosthesis during walking, as well as cosmetic advantages. The prosthesis restored the foot geometry and normalized many of gait characteristics. The findings presented here contribute to introduce a proper understanding of biomechanics of walking after wearing silicone partial foot prosthesis and are useful for prosthetists and rehabilitation therapists when treating patients after partial foot amputation.

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