共查询到10条相似文献，搜索用时 187 毫秒
1.
为了快速获得汽车油过滤器接头零件的样件，提出了基于SLS技术的快速原型制造技术，介绍了SLS技术的成型原理、成型工艺过程以及烧结汽车油过滤器接头零件时工艺参数的确定。 相似文献
2.
Production models and parts can be obtained with a CAD model of rapid prototyping technology. Because of the characteristics of rapid prototyping with SLS (selective laser sintering), hardness and strength of the forming parts are not very high. Usually these forming parts are used for testing new products, casting complicated shape, and making various inexpensive molds and dies. In a rapid prototyping process, building a CAD model is required. 相似文献
3.
用激光快速成型设备间接烧结金属粉末,由于受设备激光功率的限制,制造出零件的密度和强度都很低,为改善这种情况,文章进行了一系列的试验.试验结果表明:在普通的粉末冶金烧结炉内,原型件通过两次烧结——熔渗铜后序处理即可获得高的强度、密度,可直接用作放电加工工具的电极.该方法为金属零件与电加工电极的快速制造开辟了新途径. 相似文献
4.
This paper introduces a technical method by which bone tissue bionic scaffolds are fabricated on a selective laser sintering machine. It also analyses determinative factors in fabricating porous structure using this method, and proposes a new technique to fabricate porous structure by rapid prototyping method. 相似文献
5.
β-TCP ceramic scaffolds were fabricated with selective laser sintering(SLS)in this work. Carbon nanotubes(CNTs)were mixed with porous β-TCP matrix to enhance the mechanical performance of the bone tissue engineering scaffolds. Scaffold reconstruction and microstructure analysis were fulfilled based on micro-computed tomography(Micro-CT)scanning data.Results show that the strength of scaffold mixed with 0.2% CNTs reaches 0.819 MPa which has been improved by 85.7% compared with that without CNTs. Micro-CT analysis shows that the scaffold has a good interconnectivity, and pore size mainly distributes in the two regions of 60-340 μm and 500 620 μm. 相似文献
6.
Bo Yuan Sheng-yuan Zhou Xiong-sheng Chen 《Journal of Zhejiang University. Science. B》2017,18(4):303-315
Bone defects arising from a variety of reasons cannot be treated effectively without bone tissue reconstruction. Autografts and allografts have been used in clinical application for some time, but they have disadvantages. With the inherent drawback in the precision and reproducibility of conventional scaffold fabrication techniques, the results of bone surgery may not be ideal. This is despite the introduction of bone tissue engineering which provides a powerful approach for bone repair. Rapid prototyping technologies have emerged as an alternative and have been widely used in bone tissue engineering, enhancing bone tissue regeneration in terms of mechanical strength, pore geometry, and bioactive factors, and overcoming some of the disadvantages of conventional technologies. This review focuses on the basic principles and characteristics of various fabrication technologies, such as stereolithography, selective laser sintering, and fused deposition modeling, and reviews the application of rapid prototyping techniques to scaffolds for bone tissue engineering. In the near future, the use of scaffolds for bone tissue engineering prepared by rapid prototyping technology might be an effective therapeutic strategy for bone defects. 相似文献
7.
Ｔｈｅｐｈｉｌｏｓｏｐｈｙｏｆｒａｐｉｄｐｒｏｔｏｔｙｐｉｎｇａｎｄｍａｎｕｆａｃ ｔｕｒｉｎｇ (ＲＰ＆Ｍ)ｉｓ“ｌａｙｅｒｅｄｍａｎｕｆａｃｔｕｒｉｎｇａｎｄｌａｙｅｒ ｂｙ ｌａｙｅｒａｃｃｕｍｕｌａｔｉｎｇ” .ＴｈｅＲＰ＆Ｍｔｅｃｈｎｏｌｏｇｙｉｓｄｒｉｖｅｎｂｙｔｈｒｅｅ ｄｉｍｅｎｓｉｏｎａｌＣＡＤｍｏｄｅｌａｎｄｍａｋｅｓＣＡＤ/ＣＡＭｉｎ ｔｅｇｒａｔｅｄ .ＴｈｅｓｅｆｅａｔｕｒｅｓｏｆＲＰ＆Ｍｍａｋｅｉｔｗｉｄｅｌｙａｐ ｐｌｉｅｄｉｎｍａｎｙｉｎｄｕｓｔｒｉａｌｆｉｅｌｄｓｓｕｃｈａｓ… 相似文献
8.
Hendrik Dubbe Elena Holl Adriaan Spierings Konrad Wegener Ulrich Nieken 《浙江大学学报(A卷英文版)》2018,19(10):735-745
Examples of the use of additive manufacturing and rapid prototyping in a range of applications are of great interest in order to emphasize their role in development and production technology. In this study, a catalytic low temperature burner for H2 on a lab scale with an integrated flow distributor was designed, manufactured, and tested for functionality. Based on a theoretical approach, a flow distributor for the burner was designed and a prototype was built using fused deposition modeling (FDM). Based on test results, an optimized version of the burner was then designed and manufactured using selective laser melting (SLM). The functionality of the designed catalytic burner was proven. Several advantages were found in comparison to conventional non-catalytic burners. In particular, flameless uniform low temperature heat generation with temperatures of about 200 °C could be realized. This contribution highlights the potential of additive manufacturing in chemical engineering. Not only was the final product built using SLM, but also during the development process, FDM was used for rapid prototyping. 相似文献
9.
A CO2 laser die-cutting system, which does not need die board any more, is a new technique for manufac-turing packing box. Two optical paths, the galvanometer scanning system and the flying optical system, are used to satisfy different processing needs. The scanning system is composed of galvanometer scanning mirrors and F-θ lens. And the flying optical system is driven by two servo motors. This paper presents the software and hardware design of the laser die-cutting system, the difference between the two optical paths, as well as the relationship among the cutting speed, thickness of wrapping paper and laser power. The cutting speed and thickness of wrapping paper are linearly increased by the incremental laser power, while the cutting speed is hyperbolically decreased by the incremental thickness of wrapping paper when the laser power is constant. The amount of incision is reduced by 20% and the processing time by 40% when tested by a low power RF CO2 laser die-cutting system using the optimized program. This tech- nique is also used for the reference of other rapid laser processing systems. 相似文献
10.
李群 《鞍山师范学院学报》2014,16(4):13-15
在粉末激光烧结快速成型技术工艺中,激光功率及扫描速度对成型质量有着非常重要的影响.本文主要分析了不同激光功率及扫描速度下烧结出的金属制件,测量其体积变化,从而得出最佳的工艺参数值. 相似文献