Paper代写：Modern 3D printing technology－r51due

下面为大家整理一篇优秀的paper代写范文- Modern 3D printing technology，供大家参考学习，这篇论文讨论了现代3D打印技术。3D打印技术是一种以数字模型文件为基础，采用离散材料，基于离散堆积原理，通过逐层累加的方式来制造任意复杂形状物体的增材制造技术，其起源于20世纪80年代。3D打印技术正是第三次工业革命的代表性技术之一，受到越来越多人的关注。3D打印是一种新型的制造工艺，在现在工业生产自动化和高端化的大背景下有着广泛的使用空间。

3D printing technology, is a kind of based on the digital model file, the discrete materials, based on discrete accumulation principle, through the accumulation of step by step a way to make any complex shape object technology increases material manufacturing technology, also known as 3D rapid prototyping technology, 3D printing technology, originated in the 1980 s. In 1983, chuck invented the SLA3D printing technology, which the inventor called a stereoscopic printing, and the 3D printing technology was born. The difference between 3D printing technology and traditional construction technology lies in the manufacture of additive. The technology of additive manufacturing is the technology of manufacturing solid parts by means of the gradual accumulation of materials, and the manufacturing of parts "from bottom up" is compared with traditional material removal and cutting processing technology.

At present, the more mature 3D printing technology mainly includes FDM fusion layer product forming technology, 3DP technology, SLA stereo lithography technology, etc.

FDM melt layer product forming technology can be used in many kinds of materials, and the precision of finished products is high, which is mainly suitable for forming small plastic parts. The FDM is a three-dimensional nozzle under the control of the computer. According to the information obtained by the scanning, the material is selectively coated on the worktable, and a layer of cross-section is formed after rapid cooling. After one layer is finished, the machine table drops a height to form the next layer until it is finished.

3DP technology can directly print the objects with color, but the information conveyed by the model sample is larger. The 3DP 3D printer creates each component layer by layer by placing it on a powder thin layer. SLA stereo lithography is fast in shape and high in size, which can be applied to the rapid prototyping of complex workpieces.

SLA technology photosensitive resin as raw material, through computer controlled laser based on the information of parts of the layered cross section scanning point by point on the surface of liquid photosensitive resin, the scanned area of the thin layer of resin to produce light of polymerization and curing, a thin layer of formed parts. After a layer of solidification is completed, a thick layer is removed from the worktable, and a new layer of liquid resin is applied on the previously cured resin surface until the 3d solid model is obtained.

With the rapid development of 3D printing technology, the application field of 3D printing has gradually increased, which has attracted the attention of more and more companies. Various advantages of 3D technology also promote the development of 3D printing market in various countries. With the help of reducing material losses and accelerating the development cycle, the prospective industry research institute expects the global 3D printing market to continue to grow rapidly in the coming years. The global 3D printing market reached $7 billion in 2016, up 34.62 percent year on year, and is expected to grow to about $12.5 billion in 2017, according to prospective database data. The development of 3D printing technology in China is not as good as that of European and American countries, mainly reflected in the two aspects of technology and market. That is, technology is being developed later and less investment. Therefore, China's 3D printing market is smaller than that of European and American countries, and China's 3D printing enterprises have yet to realize internationalization, which is low in international market share.

3D printing brought a worldwide manufacturing revolution, is used to be a component design completely depends on the production process can be fulfilled, and the invention of the 3D printer, is not the case, printed artifacts can fully represent the 3D data, this makes the enterprise in the production of parts of time no longer consider the production process, any complex shape design can be done by 3D printing, 3D printing is also known as rapid prototyping technology, many artifacts of print making faster than ever before, greatly accelerate the product development cycle. Another feature of 3D printing is its full automation. The process of 3D printing does not require manual operation, which completely upsets the manufacturing methods of industry. 3D printing allows people to buy such printers in stores, and factories are selling them directly. Scientists say, the use of 3D printers are a limited scope, material limit also is very big, but in the future one day people can pass 3D printer to print out more practical, more accurate, more complex objects.

3D printing has a wide range of manufacturing, manufacturing speed, accurate physical copy, the diversity of materials, zero delivery time, less waste of materials, and many other advantages, but in a traditional manufacturing incomparable advantages at the same time, still exist some disadvantages, too. For example, the limitation of material, the precision of the forming parts and the surface roughness are poor, the size of the forming parts is limited, the cost is high, and the production is not scale.

3D printing still has some drawbacks, but it can be believed that with the progress of technology, 3D printing can overcome shortcomings and benefit mankind better.

Theoretically, any material can be used for 3D printing. However, restricted by the level of 3D printing technology, the availability of 3D printed materials is rare. 3D printing materials are now divided into photosensitive resin, metal materials and ceramic materials.

Photosensitive resin, or resin, consists of a polymer monomer and a prepolymer, with a photoinitiator. The reason for the addition of photoinitiator is that, under the ultraviolet radiation of 250 ~ 300nm, the polymerization reaction can occur immediately, and the solidification is completed to realize the adhesion between layer and layer. Photosensitive resin generally exist in liquid form, can be used to make senior high strength, high temperature resistant, waterproof materials, common photosensitive resin are Somos Next material, resin Somos11122, Somos19120 material and epoxy resin.

Since the development of 3D printing technology, the use of 3D printing of metal materials has been taken seriously by all countries and developed rapidly. In areas such as defence, light industry and heavy industry, 3D printing is expected, especially in the manufacture of metal objects. The metal materials used in 3D printing generally require high purity, narrow particle size distribution and good sphericity. At present, the main metal materials are titanium alloy, stainless steel and aluminum alloy materials.

想要了解更多英国留学资讯或者需要论文代写，请关注51Due英国论文代写平台，51Due是一家专业的论文代写机构，专业辅导海外留学生的英文论文写作，主要业务有essay代写、paper代写、assignment代写。在这里，51Due致力于为留学生朋友提供高效优质的留学教育辅导服务，为广大留学生提升写作水平，帮助他们达成学业目标。如果您有paper代写需求，可以咨询我们的客服QQ：800020041。