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CAD环境下机械设计建模及应用 总被引:2,自引:0,他引:2
通过分析常见的CAD技术建模方法,阐述了CAD技术模型构建的具体过程,从特征创建中的要点,添加约束的技巧,参数化设计中的注意事项等方面提出了建模中的注意事项。 相似文献
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超精密测量是超精密加工中的重要一环,目前其研究的内容主要涉及光干涉技术、电学测量技术以及扫描探针技术等几个方面,本文主要介绍了几种测量技术的工作原理、设备技术等方面的研究及进展情况. 相似文献
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随着社会经济的快速发展,建筑工程在促进人们生活水平的提升方面变得越来越重要,尤其是建筑工程中的电气设计。在电气设计过程当中应用BIM技术,可以在一定程度上提高电气设计取得的效果。本文将对BIM技术进行研究,合理分析BIM技术的应用优势,并且从BIM技术应用、配电弱电系统,以及电管线装配等方面对BIM技术在建筑工程中的设计应用进行分析阐述。 相似文献
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加快推广自动化技术在制造产业中的普及应用,意在优化生产加工的技术工艺,提高生产制造效率,这也是机械制造产业现代化建设的重要发展路径.本文以自动化技术在汽车机械制造中的应用为探讨主题,分析自动化技术的基本概念以及系统构成特点,从集成化技术、数控技术、电气控制以及智能系统等方面阐述自动化技术在汽车机械制造工作中的具体运用. 相似文献
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探究微波技术在金属材料制备中的应用,进一步提高了金属材料的合成种类与制备纯度,为工业领域的发展作出贡献。本文主要分析了微波技术在合成金属间化合物中的应用、微波技术在烧结金属粉末冶金材料中的应用,在熔炼金属材料中的应用、在焊接金属材料中的应用,从四个方面探究了微波技术在金属材料制备中的应用。 相似文献
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振动式林果采收技术的研究现状 总被引:1,自引:0,他引:1
针对机械化林果采收技术方面的研究需求,从振动式林果采收机械、果树动力学特性研究及果树三维模型重建这三个方面阐述了现有林果振动采收技术的发展状况,并分析了现有振动采摘技术在实际应用中的优缺点. 相似文献
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《内燃机与配件》2017,(11)
金相检验技术与红外线检测技术在保障特种设备的安全生产和检验中有着重要的作用,尤其是在展示技术对设备及材料的安全隐患方面可以及时的排除,从而保障特种设备的生产安全。本文通过金相检验检测技术在特种设备安全生产中的有效应用,红外检测技术在特种设备安全生产中的高效应用两个方面进行论述,以金相检验检测的技术原理,金相检测检验技术在使用过程中的劣化程度应用,金相检测检验技术对承压类特种设备的失效形式检验,展开高温设备衬里损伤的检测,高温炉管结焦缺陷的监测,对储液设备的液位进行检测方面进行具体的阐述,希望对以后金相检验检测技术可以更好的应用在特种设备安全生产及检验中提供帮助。 相似文献
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《Measurement》2016
This paper presents a runout measurement method and a novel finite grouping method to predict and optimize the rotational angle and translational displacement of butting pipes to minimize pipe wall misalignment (PWM). This study develops a method to minimize the PWM of the pipes excluding the positions of welding seams. In this method, the measurement data are divided into finite groups and the criteria are created to identify the positions of welding seams and eliminate the effect of the welding seams. Finally, the rotational angle and translational displacement of the butting pipes are optimized to minimize the PWM. A butting machine is designed to implement this method. The machine is benchmarked by a standard smooth pipe to minimize system errors. Three butting experiments have been performed with welded pipes of diameter 406 mm. The comparison shows that the computation results agree with the experimental results very well. The maximum PWMs in three experiments are less than 1.87 mm, which satisfies the butting requirements, that is, a PWM of less than 2.0 mm. Then, the uncertainties of the measurement results are discussed. 相似文献
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Large-diameter pipes used in offshore applications are commonly manufactured by cold-forming plates through the UOE process. The plate is crimped along its edges, formed into a U-shape and then pressed into an O-shape between two semicircular dies. The pipe is welded closed and then circumferentially expanded to obtain a highly circular shape. Collapse experiments have demonstrated that these steps, especially the final expansion, degrade the mechanical properties of the pipe and result in a reduction in its collapse pressure upwards of 30%. In this study the UOE forming process has been modeled numerically using a 2-D finite element model. The model can assess the effects of press parameters of each forming step on the final geometry and mechanical properties of the pipe. The final step involves simulation of pipe collapse under external pressure in order to quantify the effect of the forming variables on its performance. Examples of these variables are the radii of the forming dies, the chosen displacements of the dies, the compression strain in the O-step, the expansion strain, etc. An extensive parametric study of the problem has been conducted, through which ways of optimizing the process for improved collapse performance have been established. For example, it was found that optimum collapse pressure requires a tradeoff between pipe shape (ovality) and material degradation. Generally, increase in the O-strain and decrease in the expansion strain improve the collapse pressure. Substituting the expansion with compression can not only alleviate the UOE collapse pressure degradation but can result in significant increases in collapse performance. 相似文献
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Russian Engineering Research - 相似文献
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Y形三通管接头在管道系统中是最常用的连接部件之一.将图解法和计算法相结合,用计算机进行数据计算、绘图,以代替图解法的手工作图,从而快速精确地展开由一个圆柱管和两个圆锥管组成的任意夹角的Y形三通管接头.用VC 6.0编程生成专用软件,根据用户输入的Y形三通管参数,完成计算和图形显示,同时将计算数据转换成DXF文件,供AutoCAD直接调用. 相似文献
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管道开孔接管和三通设计及应力分析 总被引:1,自引:0,他引:1
通过对管道开孔接管和三通设计研究及有限元应力分析,获得了内压作用下的管道开孔接管和三通的应力分布特性.同时,对管道开孔接管和三通的结构尺寸进行了探讨,讨论了各参数的变化对管道开孔接管和三通应力的影响,得出了一些有价值的结论,达到了为管道开孔接管和三通设计和制造提供参考的目的. 相似文献
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E. N. Sosenushkin E. A. Yanovskaya I. E. Smolovich D. V. Khachatryan V. Yu. Kinderov 《Russian Engineering Research》2016,36(3):239-243
The development of new shaping technologies for pipe blanks requires simulation of the stress and strain fields, which permits assessment of the limiting stress and strain values. The stress–strain state of a pipe blank in expansion (including nonuniform expansion) is analyzed in the present work. Joint solution of the equilibrium equations and plasticity condition is employed here; that is the traditional approach. Analytical dependences of the stress in the wall of the pipe blank on the technological parameters are obtained; the basic formulas for estimating the strain are also presented. Experiments confirm the results. 相似文献
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