共查询到20条相似文献,搜索用时 562 毫秒
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基于螺旋传动机构设计了一种用于巡检机器人的升降装置。首先,根据具体的设计需求确定了升降装置的整体结构,并对其工作空间进行了简要分析。对升降装置进行了运动学分析,建立了运动学模型,并利用MATLAB进行了运动学仿真,确定了升降速度与减速电机输出转速之间的关系。然后,利用ANSYS软件对螺杆螺母组成的螺纹连接模型进行了有限元应力分析,验证了该升降装置设计的可行性,并通过对螺纹杆进行模态分析,验证了其升降工作的稳定性。最后,进行了螺旋传动机构实物样机的研制,并对升降装置整体安装实物进行了测试试验,验证了该升降装置设计的合理性。 相似文献
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新春佳节,喜气洋洋。记者相约了珠江三角洲一些城镇机床卖场的经销商,畅谈了数控机床市场。这群逐鹿商界的生意人,各抒己见,畅所欲言。他们认为,机床行业经过一番品牌战、品质战、技术战和价格战的争夺,打造了国内机床行业的巨头,磨练了机床品牌的意志,推动了整个行业的发展,让机床企业更加成熟。 相似文献
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通过对锅炉加装过热器的改造,提高了锅炉的利用率,满足了生产需要,节约了能源,降低了产品成本,为该厂节省了大量资金,保证了锅炉的安全运行。 相似文献
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近年来,我国的医疗事业得到了快速的发展,也引起了人们的广泛重视。随着科学技术的发展,越来越多的高科技产品被运用到了医疗领域。在医疗领域中,医学成像设备被广泛地应用于临床,对患者的病情的诊断和治疗起到了很大的作用,但是在使用的时候,难免会出现一些问题,这就需要对仪器进行维护。本文结合自己的工作经历,对目前医学影像器材的维护状况进行了剖析,并提出了一些管理办法,以期能对医学影像器材的使用有所裨益。 相似文献
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蒋丽华 《中国制造业信息化》2006,(9):56-57
洛阳白马集团的企业信息化建设按照”统一规划,分步实施,先易后难,降低风险,务求实效”的实施原则,稳步推进,已取得明显成效。企业目前构建了互联网与企业内部网集成的网络系统,建设了企业网站并与环球资源合作设立了电子商务平台,构建了服装CAD系统,无梭车间生产过程监测及信息化管理系统,在企业中全面实施了ERP系统。 相似文献
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覃希治 《机械工人(热加工)》2006,(8):71-71,73
由于金属切削加工费工、费料,导致生产工艺繁琐,产量低,成本高。从20世纪初开始,通过制造业的革命,产生了一系列的加工新工艺,精密铸造就是其一。瑞士生产的MP48.9mm冲锋枪,第一次广泛应用这一先进工艺,改变了SIC公司以往主要采用切削加工的生产方式,实现了该公司在兵器制造工艺上的飞跃。我国从20世纪60年代开始,从小巧的半自动步枪,到射速很高的轻、重高射机枪,均广泛应用了精密铸造工艺。目前我公司有10%~15%的零部件采用了此工艺,从而促进了企业的生产,降低了成本。 相似文献
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In a recent paper, the Ritz method with simple algebraic polynomials as trial functions was used to obtain an eigenvalue equation for the free vibration of a class of homogeneous solids with cavities. The method presented is here extended to the study of a class of non-homogeneous solids, in which each solid is composed of a number of isotropic layers with different material properties. The Cartesian coordinate system is used to describe the geometry of the solid which is modelled by means of a segment bounded by the yz, zx and xy orthogonal coordinate planes and by two curved surfaces which are defined by fairly general polynomial expressions in the coordinates x, y and z. The surface representing the interface between two material layers in the solid is also described by a polynomial expression in the coordinates x, y and z. In order to demonstrate the accuracy of the approach, natural frequencies are given for both a two- and three-layered spherical shell and for a homogeneous hollow cylinder, as computed using the present approach, and are compared with those obtained using an exact solution. Results are then given for a number of two- and three-layered cylinders and, to demonstrate the versatility of the approach, natural frequencies are given for a five-layered cantilevered beam with a central circular hole as well as for a number of composite solids of more general shape. 相似文献
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Modern methods of implementation of the rule of positive gradient of mechanical properties are considered; this rule was formulated by I.V. Kragelskii and its application serves to minimize the friction and wear of solids. The given methods include the application of coatings with the method of finishing antifricton abrasion-free treatment; application of new metal-cladding lubricating materials; and creation of a nanostructural state of the surface iron nitride layer by nitriding steel with a positive gradient of hardness normal to the surface. 相似文献
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通过分析膨胀套在实际使用产生滑移受阻现象、卡死现象原因的实质,并在分析产生问题原因的基础上提出了改进措施即:增加导向机构。 相似文献
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V. P. Dragunov E. G. Kostsov 《Optoelectronics, Instrumentation and Data Processing》2009,45(3):234-242
Specific features of operation of one- and two-capacitor microelectromechanical converters (MEMC) of energy of mechanical microscopic vibrations into electric energy with a modulated electrode-gap magnitude and with allowance for the mutual influence of electrical and elastic forces are analyzed, and the characteristics of these two devices are compared. The main factors restricting the increase in MEMC power are demonstrated to be the effects of “collapsing” and the condition of conservation of positive rigidity of the system. Expressions for estimating the limiting MEMC parameters are derived. The possibility of electrical energy generation in the presence of “real“ sources of wide-spectrum microscopic vibrations is considered. 相似文献
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本文以某些积算和双笔记录仪产品为例说明由于仪表功能设计的不合理或选型不当,影响了仪表的正常使用,制造厂和用户应关注这类问题。 相似文献
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The article provides a solution to the problem of contraction process modeling when measuring the flow of fluids and gases using differential pressure flowmeters. The article shows the feasibility of obtaining the coefficient of contraction from the mathematical model of the reduced/contracted flow of fluids or gases. An analytical expression is obtained for the coefficient of contraction, which agrees well with the results of the experiment. Analysis of this expression is performed and dependencies on the geometrical parameters of the pipeline and orifice plate are obtained. 相似文献