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rapid prototyping advantage and characteristics


Rapid Prototyping (RP) technology is the nineties developed an advanced manufacturing technology, new product development to manufacturing and services a key common technologies, to promote product innovation, shorten new product development cycles, improve product competitiveness Force has a positive role in promoting. Since the advent of this technology has been widely used in manufacturing in developed countries, and thereby generate an emerging technology. RP technology is the basis of modern CAD / CAM technology, laser technology, computer numerical control technology, precision servo drive technology and new material technology developed on integration. Different types of rapid prototyping systems because different materials used in forming, shaping principle and system characteristics are different. However, the basic principle is the same, that is, "layered manufacturing, layer by layer stacking", similar to the integration process in mathematics.

Figuratively speaking, rapid prototyping system is like a "three-dimensional printer." Superiority It can be prepared in the case without any mold, tool and tooling fixture, directly receive product design (CAD) data, quickly create a new product prototypes, mold or model. Therefore, application of RP technology can greatly shorten the development cycle of new products, reduce development costs and improve development quality. From the traditional "removal method" to today's "Growth Act", by having no mold making to mold making, which is revolutionary technology for manufacturing RP generated.

Features: RP technology complex an entity into a three-dimensional processing and processing a series of discrete layers, greatly reduces the processing difficulty, with the following characteristics: ⑴ rapidity of the whole process of molding, suitable for the modern fierce market; ⑵ can be made arbitrarily complex three-dimensional solid shapes; ⑶ with CAD models directly driven implement the design and manufacture of highly integrated, intuitive and easy modification for the perfect design products provide a good design environment; ⑷ molding process without special fixtures, molds, cutting tools, saving costs, and shorten the production cycle. ⑸ technical high level of integration is both inevitable product of modern science and technology development, but also for their combined application, with a distinctive high-tech features. Above characteristics determine the RP technique is mainly suitable for new product development, rapid single-piece and small batch parts manufacturing, manufacturing, design and manufacture of molds and model complex shapes, are also suitable for the manufacture, shape design examination difficult materials, assembly inspection and fast reverse engineering.

classification In fact, 3D printing technology is referred to a series of rapid prototyping technology, the basic principles are laminated manufacturing, cross-sectional shape of the workpiece by the rapid prototyping in the XY plane is formed by scanning forms, and in the Z coordinate intermittently for level displacement thickness, forming a three-dimensional parts. Rapid prototyping technology currently on the market is divided into 3DP technology, FDM melt laminated molding technology, SLA stereolithography, laser sintering SLS constituency, DLP technology and UV UV laser molding molding technology. [1] 3DP technology: the use of 3DP technology, 3D printers use standard inkjet printing technology, by connecting the liquid body lay on a thin layer of powder, to print the cross-sectional data the way layer by layer to create the components, to create three-dimensional solid model, using this technology print molded sample model and the actual product has the same color, the color can also be directly drawn on the results of the analysis model, a larger sample passed the information model. FDM melt laminated molding techniques: FDM melt-molding technique is laminated to filamentous material is heated to melt the hot melt, while the three-dimensional nozzle under computer control, according to the profile information, the material is selectively coated at the table After rapid cooling to form a layer section. After forming layer is completed, a decrease machine table height (ie layer thickness) and then forming the next level, until the formation of the whole solid modeling. The molding material type, high strength molded parts, high accuracy, mainly applied to small plastic molded parts. SLA stereolithography technique: SLA stereolithography techniques to a photosensitive resin as the raw material, according to various hierarchical information part sectional surface of the photosensitive resin liquid by-point scanning by computer-controlled laser, thin layer of resin is generated scan area photopolymerization The reaction is cured to form a thin part. After completion of the curing layer, a thick layer of distance down the table, then the cured resin in the original surface and then putting a new layer of liquid resin until a three-dimensional solid model. The method of forming speed, high degree of automation, can arbitrarily forming complex shapes with high dimensional accuracy, mainly used in complex, high-precision fine piece of rapid prototyping. SLS laser sintering technology selection: SLS laser sintering technology through pre-selection in the table spread a layer of powder material (metal powder or non-metallic powder), and then let the laser under computer control interface contour information in accordance with the solid part of the powder is sintered, Then continuous cycle, stacked layers forming. The method of manufacturing process is simple, wide material selection range, lower cost, forming speed, mainly used in the foundry industry made directly rapid tooling. DLP laser forming technology: DLP laser molding technology and SLA stereolithography technology is relatively similar, but it uses a high-resolution Digital Light Processor (DLP) projector to solidify a liquid photopolymer layer by layer of light curing, since When the sheet-like cured by curing each slide, and therefore faster than the same type of SLA stereolithography technology speeds. The high precision molding technology, material properties, detail and surface finish can match the durability of injection molded plastic parts. UV UV molding technology: UV UV molding technology and SLA stereolithography technology is quite similar to similar, except that it uses UV ultraviolet light liquid photosensitive resin, layer by layer from the bottom stack molding, molding process produces no noise, Highest precision molded in the same technique usually applied to high precision mobile phone shell jewelry and other industries.

 

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