亚洲免费av电影一区二区三区,日韩爱爱视频,51精品视频一区二区三区,91视频爱爱,日韩欧美在线播放视频,中文字幕少妇AV,亚洲电影中文字幕,久久久久亚洲av成人网址,久久综合视频网站,国产在线不卡免费播放

        ?

        The landmark signi fi cance of 3D- printed ship propellers

        2017-06-28 12:04:32ReporterLiuXiao
        中國船檢 2017年6期

        Reporter Liu Xiao

        The landmark signi fi cance of 3D- printed ship propellers

        Reporter Liu Xiao

        On the industrial exhibition in Hannover, German this year, a 3D-printed ship propeller won the industry's focus. The reason is that this is closely related to metal incremental technology "entering" the real shipbuilding industry. It is reported that, due to the lack of alloy materials, and the difficulty of the mechanical properties of alloys to meet the needs of shipbuilding or marine offshore engineering industry, it has been diff i cult for alloy materials to be applied extensively. During the interview, the argument was also supported by relevant evidence. The reporter learned that the shipbuilding and marine offshore engineering industry needs various kinds of materials, and there are not much material that can be used directly in metal incremental technology at present. Although some materials can substitute the original parts to improve the performance of the components itself, it is diff i cult for them to be widely used in shipbuilding and marine offshore engineering industry.

        So, what is the success of 3D-printed ship propeller? Inan interview six months ago, an expert made an analysis on the technical problems of the metal 3D printing. He once said that metals have a relatively high melting point, so they are faced with a variety of physical processes, heat conduction and surface diffusion during the manufacturing process. In addition, compared with the technology of other 3D printed materials, the rapid prototyping technology of metal parts is also the most complex. Obviously, the shaping of the 3D-printed ship propeller proved that the technical problems that has been troubling the metal 3D printing have been resolved accordingly.

        According to people of related research institutions, the materials that can be used for 3D printing is special, they must be able to be liquefied, powdered, “silked”, and can be combined after printing and have eligible physical and chemical properties. Compared with the powder of raw materials, the wire materials used by RAMLAB greatly accelerated the process of 3D printing, and also reduced the cost of printing. With the hybrid solution combining 3D printing and CNC cutting combination, we believe that it will also provide more feasible solutions for 3D printing of ships’ components in the future.

        Nowadays, metal incremental technology is gradually entering the shipbuilding industry, and it is worth discussing as to what tests will be in the future development.

        First of all, the cost is the barrier to be resolved for metal incremental technology development. Our reporter has learned that at present the cost of making metal incremental is relatively higher than other large-scale processing technology. Moreover, there are some other factors behind the higher price of metal incremental technology and processing structure. Firstly, the cost, whether to use metal powder or wire is much higher than the metal material of traditional techniques.

        Secondly, both the processing heat source and the control of processing environment have higher requirements for environment than the traditional processing methods.

        Thirdly, as a developing manufacturing technology at present, the maturity of metal incremental technology cannot be compared with other manufacturing technology such as metal cutting, casting, forging, welding, powder metallurgy and so on, there are a lot of research work to be done. These reasons all will make the price of ship fi ttings made by metal incremental technology be diff i cult to "be close to people" in a short time.

        During the interview, many industry insiders still believe that the strength, hardness, precision of 3D-printed product cannot meet ship requirements, and one of the concerns is that whether the printed product is capable of bearing when a ship's components need to be loadbearing and susceptible to high pressure and high temperatures. However, experts also admitted that, it will become a reality for 3D printing technology to be widely used in shipbuilding industry when the development of 3D technology has had developed to a certain stage and can print out a variety of sophisticated metal objects in the future.

        亚洲av乱码一区二区三区林ゆな| 蜜桃av观看亚洲一区二区| 亚洲精品国产第一区三区| 人妻少妇不满足中文字幕 | 国产激情久久久久影院老熟女| 色综合自拍| 亚洲中文字幕第二十三页| 精品高清免费国产在线| 免费网站看v片在线18禁无码| 狠干狠爱无码区| 日本一区二区在线播放观看| 国产一区二区三区视频地址| 伊人久久大香线蕉av不卡| 色窝窝在线无码中文| 国产亚洲午夜高清国产拍精品不卡 | 国产午夜免费啪视频观看| 夜夜爽妓女8888888视频| 亚洲中文字幕无码永久在线| 色窝综合网| 国产一区二区黄色网页| 国产高潮视频在线观看| 久久夜色撩人精品国产小说| 中文字幕精品乱码一二三区| 婷婷色婷婷开心五月四| 亚洲日本在线电影| 免青青草免费观看视频在线| 一本色道久久综合亚洲精品不| 欧美多人片高潮野外做片黑人| 中国年轻丰满女人毛茸茸| 亚洲av毛片成人精品| 一本大道道久久综合av| 亚洲色欲综合一区二区三区| 久久国产精品免费一区二区| 国产一级内射一片视频免费| 亚洲日韩av无码一区二区三区人| 91精品福利一区二区| 日韩精品一级在线视频| 国产精品久久久久久人妻无| 国产在线观看免费观看| 蜜桃av多人一区二区三区| 亚洲国产精品国自产拍久久蜜av|