共查询到20条相似文献,搜索用时 46 毫秒
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模型数据准备是快速原型制造的重要环节,本介绍了快速原型的技术原理以及反求工程、网络传输、CAD技术及切片技术在光固化快速原型制造的模型数据准备中应用的情况。 相似文献
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介绍了快速原型制造技术在原型制造、快速制模等方面的应用及其最新进展,展望了该项新技术及其应用研究的发展动向和前景。 相似文献
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介绍了2001年美国辛辛那提快速原型和制造技术博览会及快速原型和制造技术的新进展。 相似文献
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介绍了2001年美国辛辛那提快速原型和制造技术博览会及快速原型和制造技术的新进展。 相似文献
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介绍了快速原型制造技术在原型制造、快速制模等方面的应用及其最新进展 ,展望了该项新技术及其应用研究的发展动向和前景 相似文献
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快速成形技术是20世纪80年代发展起来的一种集计算机辅助设计、精密机械、数控、激光技术和材料科学为一体的全新制造技术.由于其高度柔性和快速性,得到了广泛的研究和应用.以快速成形为技术支撑的快速模具制造作为缩短产品开发时间及模具制作周期的先进制造技术已成为当前的重要研究课题和制造业核心技术之一.本文介绍了立体光刻技术、薄材叠层成形、选区激光粉末烧结、熔融沉积成形等快速成形典型工艺方法,阐述了用快速成形技术直接、间接制造金属模具和非金属模具的原理、工艺和研究现状,并对快速成形技术在模具制造中的应用前景作了展望. 相似文献
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结合汽车开发流程,系统地研究了样车试制阶段非金属快速样件的制作工艺,详细介绍了仪表板快速模具的制作过程,展示了硅橡胶和环氧树脂软硬结合快速模具制作工艺在大尺寸内外饰样件上的应用,指出快速模具制作工艺不但可以节约整车开发过程中PT样车阶段汽车内外饰样件的制作成本,而且还能有效缩短整车开发周期。 相似文献
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快速成形技术在铸造模具制造中的应用 总被引:1,自引:1,他引:0
介绍了各种快速成形技术的工艺原理,详细分析了快速成形技术在铸造模(如木模、蜡模、消失模、覆膜砂型(芯)、陶瓷型壳、铸造金属模等)制造过程中的具体应用,讨论了快速成形技术的发展方向。 相似文献
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介绍了在台式快速成型制造系统研制中,为稳定系统性能、降低设备造价所采取的技术措施:通过对扫描方式的比较,选择了X-Y二维导轨式扫描方式;用普通紫外灯光源取代激光光源;基于锥度光纤传输、聚焦的光路系统等技术。 相似文献
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Y.F. Zhang Y.S. Wong H.T. Loh Y.F. Wu 《Journal of Materials Processing Technology》2003,140(1-3):105-109
In this paper, an adaptive slicing method for modelling point cloud data is presented. A layer-based rapid prototyping (RP) model is directly constructed from arbitrarily scattered cloud data and fed to RP machines for fabrication. The emphasis is on how to control the thickness of each layer so that a user-specified shape error is met. Given a set of unorganised point cloud acquired by scanning a part, the first step is to segment the cloud data into a number of layers by slicing the point cloud along the part building direction (user-specified). Taking the first layer, the data points are projected onto a plane. These projected data points are then compressed and sorted to keep only the key feature points (FPs) using a reduction method based on linear correlation. The FPs are then used to construct a polygon approximation of the points. The maximum deviation of the points in the layer is then compared to the given shape error to decide whether to reduce or increase the layer thickness. This process is repeated until the maximum deviation is just below the given shape error and the first layer thus obtained. Subsequently, the remaining layers are obtained in the same manner. The algorithm has been implemented using VC++ and OpenGL. Testing results are very much satisfactory. Compared with traditional modelling methods, this method is highly automated and the generated layer-based model is highly efficient for RP manufacturing. 相似文献
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通过介绍激光快速成形技术的原理和特点、常用材料及工艺,分析了激光快速成形技术适合模具的小批量或单件生产,且可以解决传统模具制造业中制造周期长、工艺复杂的问题,阐述了激光快速成形技术在模具制造业中的优势。 相似文献
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As one of the solutions to the limitations of the current layered manufacturing, hybrid rapid prototyping systems that perform both machining and deposition are being introduced. In the hybrid rapid prototyping, a part of a complicated shape is realized by adding layers of a simpler shape, each of which is obtained by machining a sheet of constant thickness from its top and bottom surfaces. Thus it is desired to decompose a given part into the minimum number of layers while guaranteeing each layer to be fabricated from the given sheets using a 3-axis milling machine. To satisfy these requirements, a concave edge-based approach is proposed to decompose a part into layers by considering the tool accessibility, the total number of layers, and the allowable sheet thickness. In this approach, for a given build-up direction, the undercut edges, which cause a part to be inaccessible by a tool, are extracted and classified into two types and eliminated in two decomposition steps. 相似文献