共查询到20条相似文献,搜索用时 125 毫秒
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相关参数化建模能有效捕捉设计意图,其模型具有灵活的易修改能力;电子表格具有强大的编辑能力和函数运算能力,通过零件表达式或部件间表达式将相关参数与电子表格建立链接,实现电子表格对相关参数化模型的驱动,从而实现设计意图。 相似文献
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产品的三维模型设计大多采用自底向上的建模方法,在设计意图的表达和传递、装配关系的确定以及产品设计的参数化等方面均存在着不足之处。为此提出了一种基于自顶向下的装配体参数化设计方法,利用布局草图捕捉设计意图并加以传递,利用骨架模型表达产品的装配关系,设定产品的主要参数以实现参数化设计。并在SolidWorks平台上以台虎钳为具体应用实例,实现了自顶向下的装配体参数化设计过程。 相似文献
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成组技术的应用大大提高了社会工作效率。尤其在机械行业,成组技术的发展日新月异。随着现代CAD技术的发展应用,具有强大的参数化设计功能的各种CAD应用软件使成组技术如虎添翼,设计和制造领域中得到了更加广泛的应用。CAD其强大的参数化建模功能,能够很好反映成组设计意图,参数化模型易于修改。本文以UGNX为支撑平台,介绍了用三维参数化建模实现成组设计的基本思想和实现方法,结合六角螺母实例分析了三维零件成组设计的设计过程,并创建了一个简单的成组零件库。 相似文献
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为实现意图捕捉、建模和求解,并且使求解结果可直接作为参数化设计的输入,提出了意图域、载体域和信息域三个概念.从需求的角度分解设计意图,形成意图域;在意图域的指导下,对产品进行结构划分,形成载体域.用意图域映射载体域,形成含有设计信息的信息域.信息域中每个信息单元为一个独立的物理模型,应用优化理论求解模型,得到参数化设计中的主参数.以叉车设计过程为例验证了所提方法的有效性. 相似文献
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基于Pro/E关系式的渐开线斜齿圆柱齿轮参数化设计 总被引:1,自引:0,他引:1
王东 《机电产品开发与创新》2009,22(5):95-97
针对渐开线斜齿圆柱齿轮齿廓形状复杂,设计精度低的特点,根据渐开线方程生成精确的渐开线齿廓截面。应用Pro/E参数化的设计原理,建立各尺寸参数间的关系式,将设计意图用参数的方式融入到产品模型里,实现渐开线斜齿圆柱齿轮建模的参数化。关系式确保零件在参数化建模过程中拓扑结构不发生改变。 相似文献
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BIM正向设计与参数化建模在建筑设计中的应用逐渐增多。桥梁作为一种特殊的建筑形式,对参数化建模的需求更加强烈。提出桥梁结构正向设计参数化建模的新思路,通过参数化的三维几何模型分析了桥梁正向参数化模型的逻辑构成,简述了模型中桥梁结构部分和整体的描述方法 ,并依托“生态路上跨西康高速新河村大桥”拱桥方案设计实例,来阐明参数化建模过程和设计流程。 相似文献
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基于直觉认知模型的创新设计方法 总被引:5,自引:1,他引:5
通过建模直觉生成过程并应用于创新设计,提供了实现智能设计的一种新方法。首先,对产品功能、结构等设计因素进行基因表示,进而改进Hopfield神经网络用于实现联想记忆,从而建立了直觉生成的认知模型和计算模型;然后,引入环境特征来拓展设计空间,并结合杂交与变易创新运算方法,给出了基于直觉生成模型的创新设计计算过程;最后,通过桌子自动造型设计对该方法进行了应用验证。 相似文献
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Y. Li M. Fang M. L. Feng S. Frimpong 《The International Journal of Advanced Manufacturing Technology》2007,32(9-10):856-862
3-dimensional (3D) modeling approach of the working linkage of load-haul-dump (LHD) loader has been presented to implement 3D computer aided design (CAD) and manufacture. The modeling approach is described in detail with application examples. The major issues in implementing modeling are discussed. Research work is focused on integration of basic modeling operations in the HELIX design system with modeling methods proposed in this work to achieve part modeling, assembly modeling, and assembly analysis of the working linkage. Part modeling operations in the HELIX design system and proposed compound modeling method are used together to design the parts in 3-dimensions. Assembly modeling operations in the HELIX design system and proposed feature-based modeling and assembly method from top to bottom have been integrated to assembly parts into an assembly tree structure in 3-dimensions. Assembly analysis operations in the HELIX design system have been proposed to find out the geometric connection, express the spatial dimension and make the interference check in the assembly model. This approach can be used for all kinds of 3D modeling of the working linkage of LHD loader. 相似文献
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Mehmet Pınarbaşı Çagrı Sel Hacı Mehmet Alağaş Mustafa Yüzükırmızı 《The International Journal of Advanced Manufacturing Technology》2013,68(9-12):2169-2183
In this paper, flexible manufacturing systems (FMS) are studied. Firstly, an FMS design approach is proposed using integrated definition for function methodology. A systematic layout design and performance evaluation scheme is presented and detailed using this modeling framework. Then, the proposed approach is carried out with a case study from an aircraft industry to convert an existing traditional production system to FMS. To improve the system performance, a simulation-based method with Taguchi approach consisting of multiproducts is utilized. The objective is to find the machine and the product mix that achieves the maximum utilization while minimizing the cycle time. FMS system performance has been greatly improved by determining the most advantageous level of system components. It has also shown that FMS is a practicable production system in aircraft industry. 相似文献
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设计过程信息建模及重组 总被引:12,自引:4,他引:12
在综合分析现有建模技术的基础上,将软件设计中的数据流图引入工程设计过程的信息建模,提出了一种基于数据流图和设计结构矩阵进行信息建模和重组的新方法,深入讨论了目前尚不很成熟地设计结构矩阵撕裂算法,给出了算法流程,并以注塑模具设计为例,具体说明信息建模和重组的实现过程。 相似文献
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面向生产现场的虚拟装配工艺规划技术 总被引:1,自引:0,他引:1
针对生产现场的需求和虚拟装配技术的发展,阐述了虚拟装配技术在装配工艺规划、装配精度预分析、管路与线缆装配及装配现场管理等方面的应用和发展.提出了半沉浸式虚拟装配工艺规划系统的整体思路及实现方法;虚拟环境下的线缆和管路的离散控制点建模及动态布局技术;虚拟环境下的带公差的产品建模方法和装配精度预分析技术.指出虚拟装配工艺规划技术能充分利用人的经验和感知,通过模拟真实装配过程,不仅可实现产品的装配顺序和路径规划,而且也是提高装配精度和装配可靠性问题的有效手段,为提高装配现场现代化管理水平提供了有效途径. 相似文献
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CATIA三维参数化建模技术及其应用 总被引:2,自引:0,他引:2
介绍了三维参数化建模技术,阐述了CATIA的三维参数化建模方法.利用一个应用实例,详细介绍了针对系列化产品在CATIA中的三维参数化建模过程.实例证明,利用表格数据驱动模型的方法,可以有效地提高系列化产品设计的质量和效率. 相似文献
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The problem of chatter vibration is associated with adverse consequences that often lead to tool impairment and poor surface finished in a workpiece, and thus, controlling or suppressing chatter vibrations is of great significance to improve machining quality. In this paper, a workpiece and an actuator dynamics are considered in modeling and controller design. A proportional-integral controller (PI) is presented to control and actively damp the chatter vibration of a workpiece in the milling process. The controller is chosen on the basis of its highly stable output and a smaller amount of steady-state error. The controller is realized using analog operational amplifier circuit. The work has contributed to planning a novel approach that addresses the problem of chatter vibration in spite of technical hitches in modeling and controller design. The method can also lead to considerable reduction in vibrations and can be beneficial in industries in term of cost reduction and energy saving. The application of this method is verified using active damping device actuator (ADD) in the milling of steel. 相似文献
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《机械工程学报(英文版)》2018,(5)
The problem of chatter vibration is associated with adverse consequences that often lead to tool impairment and poor surface finished in a workpiece, and thus, controlling or suppressing chatter vibrations is of great significance to improve machining quality. In this paper, a workpiece and an actuator dynamics are considered in modeling and controller design. A proportional-integral controller(PI) is presented to control and actively damp the chatter vibration of a workpiece in the milling process. The controller is chosen on the basis of its highly stable output and a smaller amount of steady-state error. The controller is realized using analog operational amplifier circuit. The work has contributed to planning a novel approach that addresses the problem of chatter vibration in spite of technical hitches in modeling and controller design. The method can also lead to considerable reduction in vibrations and can be beneficial in industries in term of cost reduction and energy saving. The application of this method is verified using active damping device actuator(ADD) in the milling of steel. 相似文献