Papers by Keyword: Digital Manufacturing

Abstract: Tobe porcelain, a renowned traditional ceramic craft of Ehime Prefecture, Japan, is predominantly produced through manual techniques involving the use of a potter’s wheel. This process necessitates a high degree of craftsmanship and accumulated experience. However, the preservation of these traditional techniques is increasingly challenged by a declining population of skilled artisans, a consequence of Japan’s aging society and decreasing birthrate. In response to this issue, the present study proposes the development of an innovative manufacturing process incorporating digital technologies. A coupled thermal structural analysis of the firing process was conducted using the finite element method (FEM), and ceramic prototypes were fabricated via casting and molding, informed by the simulation outcomes. The close correlation between the simulation and experimental results substantiates the validity and practical applicability of the proposed analytical model.

Abstract: In today’s society, technology dominates most areas of human life. In particular, video games play an important role and manufacturing companies do not stop innovating to present their interactivity and playability through the hardware they introduce in the market. To be competitive in this sector it is necessary to innovate from the early stages of design to obtain products that are totally innovative in their form and interactivity but that do not cause difficulties in the subsequent manufacturing phase. By applying emotional design methodologies we will be able to establish requirements and design specifications necessary to present innovative controls to the market and facilitate the subsequent manufacturing processes. This method will be applied considering the haptic part of the controller, mainly the enveloping part, to define its characteristics, from the manufacturing point of view, to obtain an innovative product that connects with the emotions and sensations of the end user, including new functionalities in the market. To design the external part of the controller through the proposed methodology for the design of the external surfaces, also for the grips, ergonomics will be taken into account.

Abstract: It is known that natural designs are more efficient and functionality-aimed than human designs. Historically, human beings have tried to mimic the way nature designs or the natural designs themselves. However, it turned out that it was usually too complex for the technology of the time. Today there exists the opportunity to mimic most natural designs due to advances in computational power and improvements in manufacturing methods. This can lead to a major weight reduction in the metallic components used, which is a key aspect in many engineering areas such as the aerospace, automotive or energetic industries. This study shows how these bioinspired designs can improve designer experience-based designs in several ways i.e.: mechanical behavior, part number reduction, weight reduction, etc. The components analyzed here will be metallic based on aluminum. It will be also shown the significance of the manufacturing-oriented design so the iteration times are reduced between the CAD and the CAM or the reduction of prototype manufacturing itself. Of course, these designs need to be validated mechanically via CAE and the CAM will also be used to avoid uncertainty during advanced manufacturing processes. Finally, the results of the real manufacturing process are going to be shown so the end-to-end cycle is complete.

Abstract: This paper describes the process of simulation and modeling in the context of production engineering. In order to organize the smart and lean manufacturing, moreover flexible and efficient production processes we should use the digital manufacturing solution such as Tecnomatix Plant Simulation by optimizing and validating process performance, eliminating inefficiencies, shortening set up times and increasing quality before production. Manufacturing process management is an essential part of any PLM strategy. It enables you to connect your product design activities to your manufacturing planning activities.

Abstract: It is difficult to hand down magic-mirror fabrication technology, which has an extremely small satiny and continuous-curvature corrugated surface, due to downsizing of veteran engineers or even their successors. Therefore, the purpose of this study is to digitalize the magic-mirror fabrication technology using a CNC technology. A mirror finishing method is thus proposed that integrates ball end-milling and magnetic polishing it on the machining center. In addition, the workpiece is end-milled from the rear. Generation of the magic-mirror surface is also carried out.

Abstract: Network of NC technology is the realization of manufacturing automation, intelligence, integration and globalization of technology-based. This paper analyzes the development of the network system of the basic requirements of the proposed network of digital systems architecture, with emphasis on the numerical control system network hardware platforms and software platform of Design and Implementation of the analysis described, and pointed out that the Internet-based network NC CNC is a system of research and development trends, there is a strong sense of practical application.

Abstract: A theoretical model of stress-constrained topology optimization is established via level set method, a novel sensitivity analysis for the mean compliance with the stress constraint of the global measure of von Mises stress is derived by the material derivative. The triangle plane method and the Delaunay triangulation are explored to extract and sort the boundary point-cloud data, respectively. Digital manufacturing of optimization result is accomplished by automatically programming technique and wire electrical-discharge machining. Numerical examples of two-dimensional cantilever beam structure show the validity of the proposed method of this present work.

Abstract: The purpose of this work is to investigate the microstructure and tensile strength of Ti6Al4V pre-alloyed powders produced by a direct metal laser sintering technique. Traditionally, Ti6Al4V products for biomedical applications were produced through hot working or machining of wrought semi-finished products. A change in the production route for manufacturing Ti6Al4V products, from the more traditional methods to an additive manufacturing route, requires an investigation of microstructure and mechanical properties because these are strongly influenced by the production route. The microstructure obtained through rapid solidification during laser sintering shows a very fine α+β lamellar morphology. There is also evidence of martensite which was expected due to high solidification rate of the liquid pool from a temperature above the β-transus during the laser sintering process. Structurally, good mechanical properties which are comparable to the bulk material were obtained.

Abstract: In 21th century, the product upgrading becomes faster and faster. The development of varieties of production needs rapid manufacturing technology. The rapid fabrication of sand mold & core is the key of rapid casting. In this paper, the rapid manufacturing technology without pattern was applied to produce the complicated sand molds & cores of pump case. The digital precision forming technology without pattern casting was selected to mill the outer sand mold. And the Selective Laser Sintering (SLS) technology was used to print the sand core. So the complicated sand molds and cores were fabricated rapidly without pattern. As a typical digital manufacturing technology, the rapid manufacturing technology without pattern has a variety of benefits such as short cycle, low cost, flexibility and so on. The technology that combines the sand milling and SLS provides a high-efficiency method for the Single and small batch castings.

Abstract: Orthosesare important tools to help patients in rehabilitation andas well asfor theirself-care of disables in clinics. Traditionally, orthese are made manually, which is time consuming and error prone. Digital manufacturing of orthosescan significantly improve the efficiency and reduce lead time compared to tranditionalmethods.This paper attempts to conduct a review on theorthoses manufacturing method based on digital technology including Computer Aided Design (CAD), Comupter Aided Manufacture (CAM) and Reverse Engineering (RE) by examining state-of-the-art academic and industrial reserch.In this paper, the rationale behindthe development of orthoses manufacturing methodsbased on digital technologies isaddressed firstly, followed by adescription ofthecharateristicsofideal orthoses manufacturing methods. Next, some selectedresearchesindigitalorthoses manufacturing in terms of patents and academic papers isreviewedand evaluated against criteria foridealorthese manufacture. Finally thetrend of digital manufacture of ortheseisdiscussed and summarized.