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A new technology, using new materials specially designed for complex geometries, extensively used in research-development and innovation area will be presented in this paper. Even highly complex geometries are created directly from 3D CAD data, fully automatically, in just a few hours and without any tooling. It is a net-shape process, producing pa...
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... Qingsong Wei et al. [16] had produced medical models by selective laser sintering with stainless steel. Nastase-Dan Ciobota [9] have reported different processing materials for the medical purpose on Selective Laser Sintering. T. ...
In additive manufacturing processes, Laser Engineered Net Shaping (LENS) is the promising technology in developing medical implants with minimal material wastage and high accuracy in shape and size. It enables the custom design of implants that vary from patient to patient. In the present work, the LENS process has been used to fabricate and test Co-Cr-W alloy for its corrosion resistance. The process parameters selected for fabricating the samples are laser power; powder feed rate and laser scan speed, each at three levels. Samples are fabricated as per the Taguchi L-9 orthogonal array and analysis is carried out through the ANOVA and Grey Relational Grade Analysis. Through this methodology, the primary process parameters viz. Laser power (LP), Powder feed rate (PFR) and scan speeds (SS) can be optimized simultaneously for achieving a better combination of multiple performance characteristics. From the experimental results, the multiple performance characteristics of the corrosion potential (Ecorr) and corrosion current (Icorr) of Co-Cr-W alloy are evaluated. The combination of high Laser Power (350W), high Powder Feed Rate (20 g/s) and low scan speed (10 mm/s) are most influencing process parameters to achieve the best corrosion resistance samples.
... We observe that not only laser power influences the deposition but scan speed and powder feed rate too influence the quality of deposition of models. Selective Laser Sintering (SLS) is an additivemanufacturing technique that uses a laser as the power source to sinter powdered material ( typically metal), aiming the laser automatically at points in space defined by a 3D model, binding the material together to create a solid structure [28].Selective laser sintering (SLS) was developed and patented by Dr. Carl Deckard and academic adviser, Dr. Joe Beaman at the University of Texas at Austin in the mid-1980s, SLS involves the use of a high power laser (for example, a carbon dioxide laser) to fuse small particles of plastic, metal, ceramic, orglass powders into a mass that has a desired three-dimensional shape. The laser selectively fuses powdered material by scanning cross-sections generated from a 3-D digital description of the part (for example from a CAD file or scan data) on the surface of a powder bed as in figure 8. ...
Rapid prototyping / manufacturing is computer operated manufacturing technique, builds parts directly from CAD data by additive sequence layer-by-layer, unlike traditional manufacturing process where material is removed in sequence to obtain a desired part. Rapid prototype plays a crucial role in development of medical implants. As medical implants have complex design and vary from patient to patient. It is easy to make custom made medical implants by rapid prototyping at very less cost and time, compared to conventional manufacturing techniques. The present article showcases the significance of rapid prototyping applications in medical industry with suitable bio-compatible materials and manufacturing techniques used to fabricate the complex medical models.
... As shown in Figure 3, in this method, the spilling head slides forward and in reverse on the X-centre purpose, stinting one super skinny layer of photopolymer onto the build plat. Promptly among the wake of building every layer, light-weight ultraviolet illumination radiation accessible the streaming extension discharge magnetic force wave light (Nastase-Dan, Doru Dumitru et al., 2011), instantly set and activity each layer. This step forgoes the requirement for any post showing set, as needed by entirely stunning progressions. ...
Rapid prototyping (RP) advancements are in light of the rule of making three-dimensional geometries straightforwardly from computer aided design (CAD) by stacking two-dimensional profiles on top of one another. Rapid manufacturing (RM) is the utilization of rapid prototyping advancements to make end-utilize or completed items. Aside from the ordinary assembling methods which are utilized for quite a while assembling of an item, added substance assembling methodologies have picked up force in the late years. The explanation for this is that these techniques don't oblige extraordinary tooling and don't evacuate material which is exceptionally advantageous really taking shape of a segment. Rapid manufacturing is the developing innovation in assembling commercial ventures with a specific end goal to create the model inside the less time and expense effective. In this paper we talked about a portion of the fast assembling advancements in light of the sort of crude material is utilized for the procedures, applications, preferences and limits.
3D-printing technology is otherwise called added substance assembling or fast prototyping, is an advanced manufacturing technique which builds 3D parts directly in layer by layer from the computer aided plan model in raster way with minimal wastage of material. Rather than in conventional manufacturing process where material is removed by the hard tool to bring the 3D component in desired model, 3D printing is completely contrast to it where material is added in sequence parts are built in layer by layer, it doesn't require any post processing as in conventional process. 3D printed parts are more performing under different loading conditions and easy to build and repair parts any stage of design cycle. Due its flexibility of manufacturing, it shows its applications in auto ancillaries, aerospace and medical filed. 3D printing technology showing it influencing in making medical implants. Manufacturing of medical implants in conventional process is very expensive. As these implants vary patient to patient, and it is difficult to make tailor made implants in conventional manufacturing processes. Hence 3D printing technology can overcome this issue with minimal cost for making tailor made implants for individual patients
