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Layer based rapid fabrication technologies have seen rapid progress in recent years in terms of both material choices and part accuracy. Given the great progress, such technologies still have difficulties in meeting the accuracy requirements of functional parts such as mechanisms with joints. In mechanism fabrication, one of the critical factors is the joint clearance. With the limited accuracy of...
Laser Metal Deposition Shaping (LMDS) is a new rapid manufacturing technology, which combines with computer aided design, laser cladding and rapid prototyping. The advanced technology can build fully-dense metal components directly from the information transferred from a computer file by depositing metal powders layer by layer with neither mould nor tool. Since LMDS technology is a substantially complex...
The rapid-prototyping has become popular nowadays as the lifecycles of commercial and consumer products have been shorten to years or even months. The rapid prototyping technology provides a modern way to review the rapid change of the product has forced the designers and manufacturers to make new designs, jigs, tools, and molds for the products. Unlike the traditional machining of cutting material,...
Functionalized ceramic dental crown was successfully fabricated through selective slurry extrusion (SSE) of solid freeform fabrication (also known as rapid prototyping) technologies. After being sintered, the decomposed nano-tourmaline powders were embedded in ZrO2 matrix. The far infrared emission properties of the ceramic dental crown were improved due to the increased number of infrared active...
To reproduce blood vessel, we proposed new process for fabricating biodegradable scaffold by powder sintering process. In this process, model for molding scaffold was materialized by rapid prototyping. Biodegradable polymer powder and porogen were dusted to model and heated. So, arbitrary shape scaffold would be fabricated. Also, porosity that influences compliance of blood vessel scaffold would be...
Electrical discharge machining (EDM) is one of the commonly used nontraditional machining methods to produce die cavities by the erosive effect of electrical discharges. This method is popular due to the fact that a relatively soft electrically conductive tool electrode can machine hard workpiece. However, production cost increase with the complexity of the eroded cavity. Recently, new approach for...
The temperature field model for laser rapid prototyping is established by the mathematical treatment of laser power input. Temperature fields with different process conditions are numerical simulated, and the temperature is Gaussian distribution as the intensity distribution on laser beam cross-section. Temperature fields for laser rapid prototyping ware measured by thermal imager in real time. The...
Laser Metal Deposition Shaping (LMDS) is a process that fuses gas delivered metal powders within a focal zone of a laser beam to produce fully dense, 3-dimensional metal components. A variety of materials have been processed with LMDS, ranging from stainless steel to superalloy. To evaluate the processing parameters and resulting microstructures, solidification studies have been performed on defined...
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