共查询到14条相似文献,搜索用时 62 毫秒
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陕西科技大学同信技术研究所提出了层合速凝成型陶瓷零件的技术。以该技术为基础,结合层合实体成型和熔融堆积成型的特点,以雕刻机为原型进行了陶瓷快速成型机整体结构及零件的设计开发,系统地讨论分析了总体布局、结构方案的确定,以及部分零件的设计过程,并展示了采用Pro/ENGINEER Wildfire 4.0进行开发的成果。目前陶瓷材料的直接成型已经成为快速成型技术的研究热点和发展方向之一,该项目设计目标是生产成本较低,结构简单,合理可靠,易于维护,预期能为中小用户提供一种选择。 相似文献
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介绍了一种新颖的皮带轮快速安装装置.该皮带轮联接结构简单,易于快速安装变换带速,有效解决带锯床下料过程中变速的困难,可制成系列,适用不同直径材料的下料过程带速要求.节约成本,安全可靠. 相似文献
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Hwa Hsing Tang Fwu Hsing Liu Wen Hsiang Lin 《The International Journal of Advanced Manufacturing Technology》2006,30(7-8):687-692
This paper proposes an automatic machine using a new process, ceramic laser fusion, for rapid fabrication of ceramic parts. The machine comprises three parts: a laser scanning system, a green layer paving system, and a control system. In order to control the working procedure of layer paving and scanning process, a process computer is connected to an X–Y table, a PLC and a path/laser controller. An even green layer of 0.15 mm thickness could be paved accurately using ceramic slurry by a layer paving device. After drying by an infrared heater, the green layer could be fused to form a ceramic layer by a CO2 laser and then a 3-D ceramic workpiece could be fabricated layer by layer automatically. The time spent on fabricating a 25×25×0.15 mm ceramic specimen was 3 min. The SEM micrograph of the melted ceramic layers shows that ceramic green layers can be fused together. 相似文献
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详细介绍了经济型陶瓷零件快速成形机的组成、工作原理及主要结构,并将该设计制造成实体样机。利用Pro/E三维实体造型软件和分层技术对D字建模并进行分层处理等,将处理的数据输入控制设备,并将实体样机与啄木鸟DX3017型雕刻机相结合,最后加工制造陶瓷零件D。 相似文献
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S.H. Masood J.P. Singh Y. Morsi 《The International Journal of Advanced Manufacturing Technology》2005,27(3-4):415-420
This research paper addresses the issue of developing an efficient methodology to design and manufacture a complex scaffold
structure of desired porosity required for tissue engineering applications using a novel approach based on fused deposition
modelling (FDM) rapid prototyping (RP) technology. The scaffold provides a temporary biomechanical structure for cell growth
and proliferation to produce the required body parts. Conventional techniques of scaffold fabrication (such as fibre bonding,
solvent casting and melt moulding) generate scaffolds with unpredictable pore sizes due to their limitations in flexibility
and control of pore volume and distribution. Moreover, such scaffolds have poor mechanical strength and structural stability.
The paper describes an FDM pre-processor that ensures the fabrication of scaffolds of desired porosity and inter-connectivity
on the FDM system. 相似文献
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Hsiao-Chuan Yen Hwa-Hsing Tang 《The International Journal of Advanced Manufacturing Technology》2008,36(3-4):280-287
“Step effect” is one of the major concerns for engineers because it affects the surface quality in layer manufacturing. Instead
of constant thickness, adaptive slicing procedures use slices of variable thickness that are governed by the model geometry,
manufacturing process, material, and rapid prototyping system. The RP system has the capability of fabricating the layer between
a minimum and maximum thickness with certain intermediate thickness during the model making and is indispensable. Due to agglomeration
of powder and upward deformation of the layer, the layer’s thickness in powder-based rapid prototyping processes is restricted.
To improve surface quality, the current study constructs a paving system to minimize the layer thickness. Based on a wet process-ceramic
laser rapid prototyping technique, a paving system, which can fabricate ultra-thin layers to a thickness of 20 μm and can
achieve instant layer drying, was successfully constructed. A strategy of compensative layer was induced to improve accuracy
of the Z-axis. Due to the ultra-thin layers, a plane surface finishing of Rz = 15∼24 μm was obtained. 相似文献
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探讨了反求工程在快速造型技术中的重要作用,并以缸盖为例,对反求工程中的测量方法作了分析,总结了与快速造型技术相匹配的数据测量的方法及建模技术。 相似文献
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Thomas Hanemann Kirsten Honnef Juergen Hausselt 《The International Journal of Advanced Manufacturing Technology》2007,33(1-2):167-175
Different variants of reaction moulding techniques exploiting the rapid light-induced photopolymerisation of reactive resins
are widely used in microsystem technologies for the fabrication of plastic components or for rapid prototyping (RP) purposes.
In this paper, the further development of micro reaction moulding with respect to a rapid prototyping of ceramic and metal
parts will be described. As in powder injection moulding, the process sequence binder–filler–formulation, replication, debinding
and sintering has to be passed. The mould filling and, hence, the accurate reproduction of surface details depend strongly
on the composite’s viscosity, which is a function of the filler load. Especially, an improved process control of the composite
formation prior to moulding and the thermal debinding is crucial for the realisation of microstructured ceramic or metal parts.
The development of the whole process chain and some examples will be presented.
This paper was originally presented at the International Conference on Multi-Material Micro Manufacture (4M), Karlsruhe, Germany,
29 June 2005 to 1st July 2005, and is extended for publication in this journal. 相似文献
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台式快速成型装置的光学系统研究与开发 总被引:2,自引:1,他引:2
快速成型技术是光学、电子、材料、计算机等多学科集成的高新技术。研制的台式快速成型装置具有体积小、成本低的特点,其制造成本及运行成本仅为同类国外产品的1/10~1/20。论文主要论述了该装置的光学系统设计过程。在首先确定光学系统设计准则的基础上,通过几种类型的光源比较,选择性价比高的紫外灯,并实现了计算机对紫外灯的自动控制,如光的开启、关闭、能量调节等。该光学系统采用椭球镜及圆锥面透镜等使光束聚焦耦合入光纤,在锥度光纤输出端,光束经扩束、准直、聚焦、滤除杂散光后照射在液面处,由计算机控制的工作台带动光纤,实现零件的自动加工。设计的光学系统成本低,光束质量高,性能稳定。 相似文献
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Shiuh-Jer Huang Wei-Cen Shen 《The International Journal of Advanced Manufacturing Technology》2005,27(1-2):63-69
Two sets of optical sources with different laser beam diameter are integrated into a rapid prototyping system for increased
machining speed in this research. The smaller laser beam is used to scan the object contour to obtain an accurate machining
surface and the larger laser beam is used to quickly scan the inner part of the contour without precision control limitation
to save machining time. The fabrication parameters of this system are investigated based on product quality and accuracy of
practical implementations. The path planning of the inner part and the outer contour are discussed. The user-friendly man-machine
interface is developed using the Visual Basic program . 相似文献