共查询到20条相似文献,搜索用时 375 毫秒
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向现代物流管理要效益 总被引:1,自引:0,他引:1
物流管理作为"第三利润源",为各种经济形式的企业,依靠信息管理,争取制高点提供了方法和途径.文章引入系统工程方法,将流程再造与物流管理系统研究开发相结合,对国内制造企业通过物流管理增强竞争力的战略和方法进行了初步探索,对物流管理系统的结构实现提出了参考模式. 相似文献
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华东铝加工厂是中国有色金属工业总公司在江苏省镇江市与地方合资联营的铝材综合大型加工企业。该厂创建于1984年,1989年一期工程竣工投产,形成年产铝材2万吨的能力。经过“八五”后期的完善配套,近期将形成年产4万吨铝材的能力。为适应国家经济体制的转变,适应企业的经营机制由产品生产型转为商品经营型,进而向资产经 相似文献
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微弧氧化技术在Al、Mg、Ti及其合金中的应用 总被引:13,自引:0,他引:13
综述了微弧氧化技术发展状况、机理及其影响因素.有色金属Al、Mg、Ti及其合金在工业中的地位越来越重要,而其耐蚀性、耐磨性及硬度等应用性能不理想一直束缚其发展.微弧氧化技术可以直接在有色金属Al、Mg、Ti及其合金表面原位生长陶瓷层,从而改善了其应用性能.介绍了微弧氧化技术在Al、Mg、Ti及其合金中的应用.
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M. WeckD. Staimer 《CIRP Annals》2002,51(2):671-683
Parallel kinematics have recently attracted attention as machine tools because of their conceptual potentials in high motion dynamics and accuracy combined with high structural rigidity due to their closed kinematic loops. This paper, prepared with input from CIRP colleagues as well as of machine manufacturers and end-users involved in PKM, attempts to review the development of parallel kinematics for machine tools, their practical application and their performance compared to classical machine tools. 相似文献
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Rare earth(RE) metals and their alloys have attracted considerable practical interests due to their functional properties. Because of their negative deposition potentials, RE metals cannot be electrochemically deposited from aqueous media. Using molten salt as medium provides a unique opportunity for the electrowinning and electrore?ning of high-purity RE metals, as well as for the electrochemical formation of their alloys and intermetallic compounds. Certainly, the electrochemical behaviors of RE metals and their alloys have been investigated in a number of different molten salts comprising all-?uorides,all-chlorides and mixed chloride-?uoride media. Based on the results, RE and their alloys were produced by molten salt electrolysis. In this paper, the developments of preparation of RE metals and their alloys by electrolysis in molten salts in recent years were systematically summarized on both the local and international levels. Attention was paid mainly to the electrodeposition of RE metals and their alloys, including RE–Mg, RE–Al, RE–Ni, RE–Co,RE–Cu, RE–Fe and RE–Zn alloys. 相似文献
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介绍铸钢轧辊超声波探伤中非相关显示的出现机理、出现位置的理论计算和试验分析及其排除方法。 相似文献
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The protection effects of tin, zinc, nickel, iron, and copper chlorides and their binary mixtures with cadmium chloride or thallium nitrate were compared, their effective concentrations being equal. In some cases, the mixtures proved to be better inhibitors than their constituents. Different approaches to the estimation of the mutual effects of the salts in their binary mixtures are discussed. 相似文献
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为消除石油套管轧制和热处理后的纵向弯曲及圆度误差等,一般要采用矫直工艺。而作为石油套管制造最后生产环节的矫直工艺决定了石油套管的几何形状,同时也影响其力学性能。研究了满足石油套管的直线度和圆度要求下的矫直量与残余应力的关系;进行了石油套管矫直时的变形规律分析;建立了石油套管矫直的有限元模型。 相似文献
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航天航空用难熔金属材料的研究进展 总被引:2,自引:0,他引:2
综述了航天航空用难熔金属钨、钼、钽、铌、铼和其合金及其涂层在高温结构研究方面的现状和应用情况,对航天用难熔金属合金的种类、力学性能、涂层的性能、制备方法作了介绍。难熔金属主要用于火箭发动机和航天器结构件,其中钨、钼及其合金单晶应用于空间动力系统。难熔金属及其合金的使用温度高低顺序与材料熔点的顺序相同。 相似文献