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1.
UG二次开发技术及其应用   总被引:5,自引:0,他引:5  
UG是目前流行的CAD/CAE/CAM软件之一,其二次开发工具有两个模块,分别是UG/OPENGRIP和UG/OPENAPI。作为UG与外部程序的接口,UG/OPEN能够实现所有UG功能,可以开发出满足用户专业需求的软件和编制各种零件库。文章以法兰生成为例,通过UG二次开发,介绍详细的开发过程。  相似文献   

2.
主要介绍了UG软件中工程图部分默认表达方案与我国现行制图国标之间的差异,提出了基于国标要求,在UG软件中将实体转换成工程图时的几点意见。  相似文献   

3.
针对我校培养"应用型人才"的目标,结合鸥鹏OpenNC教学与实训平台软件,研究基于UG的数控实验教学的具体内容,旨在使学生掌握UG的建模、UG的数控加工及UG的二次开发等技术,并通过OpenNC平台对实例进行验证。  相似文献   

4.
《UG》是实际应用最广的CAD/CAE/CAM软件之一,在教学过程中如何让学生真正会使用软件完成设计任务,提高学生分析、解决实际问题的能力,培养学生的创新能力和团队协作意识,是一个迫切需要解决的问题。将“任务驱动教学法”应用在《UG》教学中,在实际教学中取得了较好的效果。  相似文献   

5.
利用UG软件的线面重构技术   总被引:1,自引:0,他引:1  
分析了工程实际中线面重构的局限性问题,运用UG软件的线面造型、分析、计算、查询等功能,通过UG软件的开发工具,直接调用UG软件内部函数,编写了“原始曲线”、“基准平面”和“求取交点”3个程序,快捷简便地生成新的插值点,从而进行线面重构。由此寻求出线面重构的一种快捷有效方法,为反求工程中的建模提供了一种新的思路和方法。  相似文献   

6.
提出了一种螺旋桨桨叶造型的新方法——采用UG软件对螺旋桨桨叶进行精确实体缝合造型法,充分利用Matlab与UG的接口技术。对桨叶截面曲线的形成进行了优化,提高了造型精度,得到了光顺的螺旋桨桨叶的三雏实体模型,为螺旋桨的性能优化及数控精加工创造了条件。  相似文献   

7.
李阳 《中国科技博览》2012,(24):302-302
由美国Unigraphics Solution公司开发的UG软件的实体建模、工程制图、装配建模等功能,通过进行装配仿真、机构运动仿真来进行尺寸干涉检查,可及时发现设计中的错误,确保产品设计尺寸的准确性;通过对一套筒零件钻夹具的设计,展现UG的强大建模和工程制图功能。  相似文献   

8.
利用UG软件实现齿轮的精确建模   总被引:5,自引:0,他引:5  
介绍利用UG软件建立齿轮三维模型的方法。  相似文献   

9.
《工业设计》2012,(5):69-70
随着机械设计水平的不断发展,计算机辅助设计设计CAD/CAE/CAM一体化软件显示出其高效智能的优势,UG软件便是其中之佼佼者。UG将机械设计与生产的全过程集成在一起,它采用参数化的及面向零件的3D实体模型的设计制造技术,  相似文献   

10.
王昌  赵宾 《塑料包装》2013,(6):16-17
本文介绍了气压瓶盖注塑模具的结构特点和工作过程,首先分析气压瓶盖的结构及工艺特点,并以UG软件为主、AutoCAD软件为辅进行模具浇注系统、凸凹模及侧向抽芯机构等的设计。  相似文献   

11.
北衙金多金属矿床地质特征与成因   总被引:1,自引:0,他引:1  
详细讨论了北衙矿区的地质特征,通过对勘探资料的深入研究和野外观察,初步确定,北衙矿区存在两期岩浆活动,早期的石英正长斑岩、正长斑岩等近南北向分布,晚期的黑云正长斑岩、煌斑岩脉等呈近东西向展布。矿化主要与近南北向岩体关系密切。北衙地区存在五种矿床类型,即矽卡岩型铁金矿床,其形成时代相对较早,分布于万硐山矿段、马头湾矿段等地;斑岩-隐爆角砾岩筒型金铜矿床,分布于北衙矿区的西矿带的万硐山-红泥塘(观音箐一带,形成时代相对较晚,并叠加于早期的矽卡岩型矿床之上;裂隙-溶洞型铁金矿床,主要分布于北衙矿区的东矿带的笔架山一带,属强氧化高品位金矿石;砂岩型铁金矿床,分布于本区的三叠系下统腊美组(T1l)砂岩中,呈似层状产出,成矿潜力巨大;红土型金矿床,主要分布于北衙盆地浅表部位的丽江组(E2l)和第四系堆积物中,易采易选,可供利用。北衙地区下一步勘探和研究的主要矿床类型应是深部具有潜力的斑岩(隐爆角砾岩筒型金铜矿床和三叠系下统碎屑岩中产出的砂岩型铁金矿床。  相似文献   

12.
This Paper presents a comparative study of minces prepared from headed and gutted sardines and minces prepared from whole sardines, with a view to avoiding unnecessary product handling and improving yields. Certain additives (cryoprotectants and antioxidants) were blended into some of the mince lots in an attempt to extend their storage life, and in one of the lots the mince was washed prior to mixing. The minces were prepared by extrusion and the lots were fashioned into 4 cm thick 700 g blocks, frozen in a horizontal plate freezer until a core temperature of −20°C was attained, vacuum packed and stored at −20°C for 12 months. Proximate analysis, minerals analysis (Na,K,Mg,Ca,Fe and Cu) and yield measurements were carried out prior to freezing. Protein solubility, emulsifying capacity, cooking loss, K value, pH, TBA index, viable germ counts, entero and coliform bacteria, instrumental texture analysis and sensory analysis were periodically measured. The results obtained can be summarized as follows: the method of extrusion appears to be particularly well adapted to whole fish with regard to the avoidance of handling and improving yields. In relation to mineral content the only appreciable difference is a higher sodium content in minces made from whole fish (E lots) than in minces made from gutted and headed sardines (D lots), while in the washed lots there was an appreciable decreases in the amounts of Cu, Fe, Mg and K. Protein solubility stayed at higher levels in the E lots than in the D lots, though it was high in both types of mince at the end of storage: the use of protein cryoprotectants is advisable particularly in the washed D lot (DL) and in the E lots when storage of >6 monts is required. The emulsifying capacity, which was initially higher in the E lot than in the D lot, stabilized after the second month of storage. The effect of the protein cryoprotectants was to increase slightly the emulsifying capacity, which remained higher than in the control lots throughout the storage period, even in the DL lot, which the authors feel is important with regard to the use of these minces in sausage-type products. Cooking loss was initially higher in the D lots, but after the fourth month of storage it was the same for both types. The protein cryoprotectants reduced cooking loss and were more effective in the E lots. Due to fluctuations in K values obtained, the authors do not regard them as a reliable indicator of product quality. The pH was slightly more basic in the E lots than in the D lots, and pH increased in the additive-containing lots, especially in the washed mince preparation. The TBA index only showed significant differences between the D and E lots in the final test performed. The antioxidants appeared to be more effective in the E lots than in the D lots. Washing also delayed the onset of randicity, probably through the removal of fat and catalysts with the wash water. No synergistic effect was observed between the protein cryoprotectants and the antioxidants. The total initial count of micro-organisms was substantially higher in the E lots than in the D lots because of the intestinal content, though the levels equalized during storage and at no time exceeded allowable limits. Washing did not significantly decrease germ counts. The initial excessive amounts of enterobacteria in the E lots decreased during storage, whereas the level of caliform bacteria, on the other hand, remained constant. In the E lot without additives (ESS), however, Escherichia coli was detected prior to freezing but not in any of the subsequent analyses. In general, texture as determined by instrumental methods (hardness, firmness, elasticity, and cohesiveness) gave higher values for the D lots than for the E lots. Washing increased hardness and firmness while cryoprotectants reduced them. Cooking considerably hardened the samples in the case of the D lots but did not cause variations in the E minces. Hardness and firmness remained quite stable, although there was a slight increase in the cryoprotectants-free lots and washed minces. Elasticity tended to increase in the E lots during storage, and this effect was more pronounced in the cryoprotectants-free lots; cryoprotectants had the effect of decreasing elasticity and stabilizing it in the D lots, although they were higher in the D lots than in the E lots. Elasticity and cohesiveness remained constant in the washed mince. Cohesiveness increased in all the lots during storage, and the cryoprotectants exerted no effect on this parameter. In connection with the sensory analysis, a certain sweet taste was perceived in the cryoprotectants-containing D lots, slightly reducing the quality of the product, though it was not found unpleasant and was barely detectable in the E lots. The typical sardine flavoured lots by the washed mince reduced its acceptance, though this opens up a series of technological possibilities for it. A rancid taste was detectable in the ESS lot after five months in storage, in the E lot with protein antidenaturants (ESP) after eight months, and in the E lot that contained antioxidants (ESAO) and protein antidenaturants and antioxidants (ESA), in the last test carried out.  相似文献   

13.
HL-1M装置边缘扰动和流速的实验研究   总被引:2,自引:0,他引:2  
利用一组马赫探针研究HL-1M装置刮离层和边缘等离子体流在欧姆放电、壁硼化、偏压抽气孔栏、偏压电极、低混杂波电流驱动、电子回旋共振加热、弹丸注入、分子束注入、激光吹气和补充送气等情况下的平行流马赫数、离子饱和电流扰动、平行流速度剪切和极向流速度的分布。实验中发现局部等离子体电位快速变化,改变了电场分布,改变了边缘等离子体的流速和方向。从而改善了等离子体约束性能。  相似文献   

14.
In 1947, Kê observed a large relaxation peak around 0.46Tm in polycrystalline aluminum. This peak being absent in single crystal, Kê concluded that this relaxation effect was due to grain boundary sliding (GBS). In the 1970s, Woirgard, in the same temperature range, observed a peak in single crystal. Later on Rivière, Esnouf, and No systematically studied different relaxation effects in single and polycrystals and they concluded that the Kê peaks, as well as the other relaxations observed in this temperature range, are due to dislocation motion, the mechanism being probably the climb of jogs. More recently, in Ni–Cr, Cao clearly observed the presence of a large relaxation peak in polycrystals, which is absent in single crystal. He showed that the peak is due to grain boundary sliding, the mechanism of which is the climb of dislocations in the grain boundaries. Does a relaxation effect due to grain boundary sliding exist in metals? The question is still open and will be discussed in this paper considering recent results of the Chinese, French, Spanish and Swiss school.  相似文献   

15.
葛金林  肖海平  闫大海 《发电技术》2020,41(5):552-4141
为了研究流化床生物质气化协同处置生活垃圾衍生燃料过程中重金属的迁移转化规律,在湖北某循环流化床气化炉耦合燃煤发电厂进行掺烧试验。研究表明重金属主要赋存于飞灰和炉渣中。空白工况下86.2%的Cr赋存于飞灰中,13.3%于炉渣中;75.5%的Pb在飞灰中,23.8%在炉渣中;79.5%的As迁移至飞灰中,11.7%在炉渣中。RDF工况下75.8%的Cr迁移至飞灰,20.7%迁移至炉渣;44.6%的Pb存在于飞灰中,52%存在于炉渣。协同处置后,重金属在飞灰和炉渣中的分配比例明显发生了变化,飞灰中重金属含量减少12.5%~31.3%,炉渣中重金属增加7.33%~20.1%,气化气的引入改变了炉内重金属的分配情况。协同处置可以有效处理生活垃圾,对固废中的热量进行资源化利用,且出炉物料中重金属含量均低于我国现行标准限值。  相似文献   

16.
Experimental investigation of oil retention in air conditioning systems   总被引:3,自引:1,他引:2  
In air conditioning and refrigeration systems a small amount of oil is carried with the refrigerant and is retained in the system components. Oil retention characteristics in the condenser, evaporator, liquid and suction lines were measured and are presented and discussed here. Refrigerants R22, R410A, and R134a with miscible and non-miscible lubricants were considered to investigate oil retention physics in the widest possible range of transport properties. A parametric analysis in the suction line showed that oil retention depends on the oil mass fraction, vapor refrigerant mass flux, mixture viscosity ratio and orientation of the pipe. In the suction line, an increase in mixture viscosity of about 55% caused a rise in oil retention in the range of 50%, depending on the oil mass fraction. Oil retention in the upward vertical suction line is about 50% higher than in the horizontal line at similar conditions.  相似文献   

17.
Hollow‐structured mesoporous materials (HMMs), as a kind of mesoporous material with unique morphology, have been of great interest in the past decade because of the subtle combination of the hollow architecture with the mesoporous nanostructure. Benefitting from the merits of low density, large void space, large specific surface area, and, especially, the good biocompatibility, HMMs present promising application prospects in various fields, such as adsorption and storage, confined catalysis when catalytically active species are incorporated in the core and/or shell, controlled drug release, targeted drug delivery, and simultaneous diagnosis and therapy of cancers when the surface and/or core of the HMMs are functionalized with functional ligands and/or nanoparticles, and so on. In this review, recent progress in the design, synthesis, functionalization, and applications of hollow mesoporous materials are discussed. Two main synthetic strategies, soft‐templating and hard‐templating routes, are broadly sorted and described in detail. Progress in the main application aspects of HMMs, such as adsorption and storage, catalysis, and biomedicine, are also discussed in detail in this article, in terms of the unique features of the combined large void space in the core and the mesoporous network in the shell. Functionalization of the core and pore/outer surfaces with functional organic groups and/or nanoparticles, and their performance, are summarized in this article. Finally, an outlook of their prospects and challenges in terms of their controlled synthesis and scaled application is presented.  相似文献   

18.
Servitization of manufacturing has become one of the main pathways for transition and upgrade in the manufacturing industry. New information and communication technologies (ICTs), such as the Internet of Things, Big Data, and Cloud Computing have enabled the servitization of manufacturing in terms of value creation, resource management, and supply chain management. This study presents a comprehensive review on the servitization in operations management in the era of new ICTs. A new value chain framework is proposed under the business model that revolves around servitization, which showcases the new activities and ways of implementation in the era of new ICTs. The virtualization, configuration, and evaluation of integrated manufacturing and service resources are analyzed. In particular, the methods used in new ICT-supported resource management platforms are surveyed. Problems in the supply chain management in manufacturing services (including the selection of partners, as well as the coordination, planning, and scheduling among members) are presented. This study concludes with a discussion on state-of-the-art servitization in operations management in the era of new ICTs.  相似文献   

19.
Unit load testing of boxes reported in the literature typically uses empty boxes to explore the impact and interactions among box configurations, pallet support and other environmental parameters. However, this approach leads to failure in the weakest box in the unitized structure, while in the field, failure almost always occurs in the bottom box, which may or may not be the weakest. We find in this paper that mathematically, numerically and experimentally, forcing box failure to the bottom results in higher test values. While this occurs naturally for boxes in use in the field, it is an interaction which to date has been overlooked by researchers examining box performance in the lab. The impact on box estimation can be on the order of 5% or more, which can be as significant as some of the environmental factors we are working to quantify, and which can have significant cost implications. To improve the assessment used in the industry to account for the impact of a box's ‘in use environment’ on its performance, we need further testing on configurations where the boxes are loaded. Copyright © 2010 John Wiley & Sons, Ltd.  相似文献   

20.
This paper considers an inspection policy for a single component protection or preparedness system, in which the component arises from a heterogeneous population. At any point in time, the system may be in one of three states, good, defective or failed. The system is only required in an emergency, and in order to ensure high availability of the system on-demand, the system undergoes a sequence of inspections. Inspection determines the system state, so that if a transition from the good state occurs between inspections it is not revealed until subsequent inspection. When a defect or failure is revealed, the component is replaced. At the final inspection the component is replaced. We suppose that a component may be either weak or strong, so that the time in the good state has a distribution that is a mixture. In these circumstances, the efficacy of a two-phase inspection policy, with an anticipated high inspection frequency in early life and low inspection frequency in later life, is considered using availability and cost criteria. The policy is investigated in the context of a valve in a natural gas supply network. If the lifetime distributions in the mixture are quite distinct, then cost savings of the order of 5% can be achieved by using the two-phase policy in place of the simpler single phase policy. Furthermore, only if the mean time in the defective state is small or the required availability is very high does the two-phase policy tend to mimic a burn-in policy.  相似文献   

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