Development Of Rapid Prototyping Technology Research Articles

CUSTOMISED INFILL PATERNS FOR STREGHTENED 3D PARTS

The development of rapid prototyping technologies generates a strong concern for saving all types of materials while maintaining, or even increasing, the strength of 3d printed parts. One way to partially meet this requirement is to make models with a low degree of filling. However, the types of predefined filling structures, defined in the slicing programs, are relatively small in number, being based on repetitive patterns. In this paper it is proposed to make a specimen with a filling structure adapted to the expected stress that appear during operation. Model design can be done in any computer-aided design environment. The deformations of the modified specimen were compared with the deformations of some models with predefined filling structures, under the conditions of maintaining the same loads. This comparison allows to verify the strength of the specimen, under the conditions of using the same volume of material, compared to the models with predefined structure. In addition, conclusions can be drawn regarding the strength of various filling patterns and the time required to print the specimen. The favorable results create the premises of developing an algorithm that can allow the generation of some filling models optimized for different types of loads and eventually the possibility of applying the same concept of custom filling structure for other rapid prototyping technologies.

Research on 3D Printing Technology of Polylactic Acid

Additive manufacturing technology(3D printing) as a rapid development of rapid prototyping technology in recent years. However, the surface quality and mechanical properties of the molded parts are worse than those of traditional material reduction manufacturing due to the special bottom-up processing and forming principle. In this paper, the performance of FDM parts is improved by studying the process parameters. According to the actual research situation, this paper selected the filling density, printing speed, printing temperature, stratification direction for experimental research. Through orthogonal test and single factor method, the best strength combination is obtained as filling density 80%, printing speed 35mm/s, printing temperature 195℃. After range analysis, it is found that the filling density has the greatest influence on tensile strength, followed by printing speed and printing temperature. the lamination direction also has a significant influence on tensile strength.

The effect of limescale on heat transfer in injection molding

With the development of rapid prototyping technologies, injection mold inserts with conformal cooling systems can be manufactured from metal powder by direct metal laser sintering (DMLS). The conformal cooling channels are placed along the geometry of the injection molded product, thus they can extract more heat, and heat removal is more uniform than in the case of conventional cooling systems. But even the most efficient cooling circuits start to wear out, corrosion and limescale depositions precipitate on the wall of the cooling channel, which impede heat transfer from the mold to the coolant. The effect of the depositions cannot be neglected and the modeling of the impact on heat transfer is difficult. We developed a model to investigate the effect of limescale that formed on the wall of the cooling circuit. The thermal properties of the limescale are required for the simulation, therefore they were measured. We concluded that 2mm thick limescale impedes heat removal so much that the more efficient conformal cooling system can only extract as much heat as the less efficient conventional system.

Застосування 3D-технологій в інклюзивному середовищі

The fast development of rapid prototyping technology has allowed to significantly simplify life for disabled people with visual impairments. The use of 3D printing in the manufacture of products for the blind greatly expands the ways of their communication in society, increases the level of inclusive education by ensuring equal access to quality education for children with special needs. The article describes the most common methods of three-dimensional printing and briefly describes the basic principles of their work. There were considered materials that are used most commonly in the manufacture of products for the blind by these methods, their advantages and disadvantages. It this work, there is also presented the cause-effect diagram of Braille 3D printing for assessing the impact of technological factors on the quality of the information reproduction process for blind people. Ensuring the consistently high level of inclusive and proper quality of print products for the blind is always an urgent and priority aspect of the work of most institutions and printing industry organizations, in the implementation of which each of them faces a number of issues related to the selection of optimal parameters of technological operations, equipment characteristics and properties of materials. The extension of the inclusive education process is not only a reflection of time, but also represents another step towards ensuring the full realization of the rights of people with special needs for quality education. Facilitates the solving of such a task as the large-scale introduction of technology of three-dimensional printing in the production of products for the blind. Therefore, it is expedient to carry out further research of materials and their properties, which are used in 3D printing technologies, which will allow to recreate the corresponding geometric parameters of relief-dot Braille images that are difficult to achieve in traditional printing methods.

Production Technology of the Internal Combustion Engine Crankcase Using Additive Technologies

The use of rapid prototyping technologies to create new industrial products, of particular importance is the cost and speed of production, a unique opportunity to use cost-effective methods for the production of parts by investment casting. At the stage of pilot production, which is characterized by frequent changes in design, the problem of the rapid production of cast components becomes crucial. This is mainly due to the complexity of manufacturing foundry equipment. In turn, the research and development of rapid prototyping technologies have allowed a new level of optimization and the introduction of new technologies in the investment casting. The purpose of the given work consists in estimations of efficiency of application of technology of fast prototyping at moulding on melted models, estimations of accuracy of the received sizes of casting at moulding on melted models with use of technology of fast prototyping, and also an estimation of adequacy of virtual modelling of process of moulding in comparison with real process of pouring. The work was conducted with the use of cross-cutting design in CAM / CAD / CAE systems. The study size and precision parameters of the casting was conducted in co-ordinate measuring machine. The work has been verified the adequacy of the virtual simulation of the process of forming a casting in the casting simulation ProCAST, in comparison with those obtained castings. The study showed that the use of rapid prototyping technologies with investment casting can significantly reduce the time for making castings, decrease production costs and improve the accuracy of the casting size.

Development of a technique of molding small complex parts of gas turbine engines from high-temperature alloys using additive technologies

Rapid prototyping technologies provide a unique opportunity to receive cost-effective solutions for theproduction of parts by investment casting. Research and development of rapid prototyping technologies allowedto move to a next level of optimization and the introduction of new processes in various areas of industry. At thestage of pilot production, which is characterized by frequent changes in design, the problem of the rapidproduction of cast components becomes crucial. This is mainly due to the complexity and the complexity ofmanufacturing foundry equipment. In turn, the research and development of rapid prototyping technologies haveallowed a new level of optimization and the introduction of new technologies in the investment casting. The aimof this work is to identify opportunities and evaluate accuracy of the size of the casting during investment castingusing rapid prototyping technology. The work was conducted with the use of cross-cutting design in CAM/CAD/CAE systems. The study size and precision parameters of the casting was conducted in coordinatemeasuring machine. The work has been verified the adequacy of the virtual simulation of the process of forminga casting in the casting simulation ProCAST, in comparison with those obtained castings. The study showed thatthe use of rapid prototyping technologies with investment casting can significantly reduce the time for makingcastings, reduce production costs and improve the accuracy of the size of the casting.

Development techniques of casting complex parts of aerospace profiles using additive technologies

The use of rapid prototyping technologies to create new industrial products, with particular importance isthe cost and speed of production, is a unique opportunity to use cost-effective methods for the production ofparts by investment casting. At the stage of pilot production, which is characterized by frequent changes indesign, the problem of the rapid production of cast components becomes crucial. This is mainly due to thecomplexity and the complexity of manufacturing foundry equipment. In turn, the research and development ofrapid prototyping technologies have allowed a new level of optimization and the introduction of newtechnologies in the investment casting. The aim of this work is to identify opportunities and evaluate accuracy ofthe size of the casting during investment casting using rapid prototyping technology. The work was conductedwith the use of cross-cutting design in CAM / CAD / CAE systems. The study size and precision parameters ofthe casting was conducted in co-ordinate measuring machine. The work has been verified the adequacy of thevirtual simulation of the process of forming a casting in the casting simulation ProCAST, in comparison withthose obtained castings. The study showed that the use of rapid prototyping technologies with investment castingcan significantly reduce the time for making castings, reduce production costs and improve the accuracy of thesize of the casting.

Analysis of Nozzles of Rapid Prototyping System Oriented to Bio-Manufacture

Bio-manufacture is an interdisciplinary research area, which is based on the development of rapid prototyping technology, biomaterial and biomedicine technologies. It brings a new revolution in manufacturing science. Producing scaffolds of high performance is the purpose of bio-manufacture. For many rapid prototyping, which is suitable for bio-manufacture, the core difference lies in their enable technology. Extrusion-based rapid prototyping technology is an important branch of rapid prototyping, and each system has different nozzle device. In this paper, through in-depth research and analysis of structure, performance and materials used of spray head in the market for bio-manufacture, it can provide scientific basis for selecting more suitable spray head of rapid prototyping for bio-manufacture.

Research on the Service-Oriented Price Quotation Method and System for Rapid Prototyping

Rapid prototyping (RP) was an advanced manufacturing technology which satisfied the individuation products. With the development of RP technology, RP providers were always facing the urgent price quotation requirements for RP parts from customers in today’s competition market. In order to support the enterprises to achieve more competitive, this paper developed a service-oriented price quotation system .The paper presented a price quotation model for the RP parts and quotation methods for all RP technologies based on volume technical parameter method. And we proposed a new quoting price system frame using service-oriented architecture and it provided price quotation service for the RP enterprises, standardized their internal management as well as effectively managed the inquiry and bargain between enterprises. Thus the system ensures the price quotation accurately and rapidly.

JET APPLICATION TECHNIQUES ON BIO-MANUFACTURE ENGINEERING

Bio-manufacturing is an interdisciplinary research area,which is based on the development of rapid prototyping technology,biomaterials and biomedical technology.The jetting technique for biomaterial is one of the key factors in bio-manufacturing engineering.The principle,using range, advantages and disadvantages of the jetting techniques such as screw extrusion,piston extrusion,pneumatic extrusion,mi- cro-droplet,laser-guided direct writing,electrostatic spinning and DPN are researched,on the basis of practical applications. The new progress of those technologies also is introduced.The scaffold shaping accuracy and complex degree are partly de- cided by the choice of nozzle.The fight jetting technology is selected by the comparison of micro-droplet diameter,assembly efficiency and using biomaterials.The developing trend fits into the following four directions:fitting more board biomaterials based on filling the required precision,heightening of shaping precision in the range of application biomaterials,improving the order of magnitude in precision and reducing effect on the biomaterials.

Effect of tool finishing on ejection forces for injection moulded parts made using direct metal laser sintered tools

With the continuing development of Rapid Prototyping technologies, there has been a move into areas of Rapid Tooling. This takes advantage of the shorter lead times and lower costs associated with the production of tooling, particularly for injection moulding. This paper analyses the effectiveness of using direct metal laser sintering to produce injection-moulding tools, in terms of the force required to eject a part from a tool. Different levels of finishing were applied to test tools, and the results show that in some cases the forces required to eject parts from direct metal laser sintered tools were comparable with those from machined tools.

自動車焼結部品における新しい技術と展開 レーザー焼結による金属粉末の３次元造形―金型フリーによる複雑３次元部品の製造に向けて―

Rapid prototyping (RP) technology has given the product designer access to a vast arsenal of tools and technologies unprecedented in the history of manufacturing. The incredible pace of desktop computing with the market availability of 3D software and the development of rapid prototyping technology allows product design to engage more freely with new ideas, to produce prototypes and to carry out thorough testing in a shorter time. The present review first describes significant roles of RP from the viewpoint of value engineering. Next, the fundamentals of information-driven RP technology are outlined, together with its typical applications. Then, the state-of-the-art technology of RP-based metal fabrication including Selective Laser Sintering (SLS) and GreenTape Laser Sintering (GTLS) is extensively surveyed: the principle, the machine architecture and various product applications such as stainless-steel rotors, stainless-steel heat exchangers, copper-bonded cBN tools and titanium artificial bones. Finally, the future of powder-based RP technology is envisaged.

Rapid design and manufacture tools in architecture

The continuing development of Rapid Prototyping technologies and the introduction of Concept Modelling technologies means that their use is expanding into a greater range of applications. The primary aim of this paper is to give the reader an overview of the current state of the art in Layered Manufacturing (LM) technology and its applicability in the field of architecture. The paper reports on the findings of a benchmarking study, conducted by the Rapid Design and Manufacturing (RDM) Group in Glasgow [G.J. Ryder, A. McGown, W. Ion, G. Green, D. Harrison, B. Wood, Rapid Prototyping Feasibility Report, Rapid Prototyping Group, Glasgow School of Art, 1998.], which identified that the applicability of LM technologies in any application can be governed by a series of critical process and application specific issues. A further survey carried out by the RDM group investigated current model making practice, current 3D CAD use and current use of LM technologies within the field of architecture. The findings are then compared with the capabilities of LM technologies. Future research needs in this area are identified and briefly outlined.