共查询到20条相似文献，搜索用时 62 毫秒
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陈泉开 《闽西职业大学学报》2005,7(4):136-138
彩色涂层钢板是近十年新兴的一种新型材料，其生产工艺由开卷工艺，彩涂工艺和卷取工艺三部分组成。生产线机组主要包括机械设备、前处理设备、涂敷设备、烘干设备、辅助系统和电控装置等。非标机械设备主要有开卷机、焊接装置、入口／出口活套车、涂层机、卷取机。 相似文献
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开卷机是连续热镀锌生产线上的重要设备之一,而开卷机的涨缩系统的正常运行是保证开卷机完成开卷送料工序的必要条件。根据连续热镀锌生产线的实际生产情况及设备运行状态,针对开卷机在生产运行过程中频繁发生涨缩缸杠头断裂,拉杆断裂及铜滑条勾头断裂等导致开卷失效的问题,进行了探讨与研究,并提出了解决问题的办法及优化方案。 相似文献
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《赤峰学院学报(自然科学版)》2017,(15)
结合目前市场上硬币处理装置的功能单一,通用性差等问题,设计了硬币清分计数包装一体机.该装置是一种结合市场现行流通硬币的清分,计数并打包的一体化机械设备.其特点突出表现在工作效率和工作能力上,设备整体操作简单易行,且发生清分失误的概率低.使用PVC有机高分子材料管盛装硬币,符合当前社会的发展要求. 相似文献
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机械设备是现代化工企业在生产中所需的机械、装置和设施等的统称,可供长期使用,并在使用中基本保持原有实物形态的物质资料,是化工行业重要的生产工具.随着科学技术的不断进步和经济的高速发展,化工机械设备朝着大型化、高速化、精密化、电子化、自动化等方面发展.在取得发展,新技术、新材料不断应用的同时,加强机械设备的基本维修、养护措施不容忽视.下面就从化工机械设备的润滑环节加以探讨. 相似文献
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企业隔热套组件要求喷涂METCO 405NS (NiA1丝材)底层和METCO 307NS-2(镍石墨粉末)面层.MET-CO 307NS-2涂层已是成熟的工艺,而METCO 405NS (NiA1丝材)在企业从未进行过研制,属于新材料、新工艺,为此本项目从底层METCO 405NS涂层工艺参数开展研究工作,通过设计的相关标准要求的金相、结合强度、弯曲、硬度的性能测试,优选出火焰喷丝METCO 405NS底层的最佳喷涂工艺参数,最终能够使制备的涂层符合设计的要求,从而来满足某型机批产需要. 相似文献
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张文奇 《武汉工程职业技术学院学报》2019,(3)
开卷机是冷轧热镀锌产线的关键设备之一。某钢厂开卷机频繁发生铜滑条断裂及变形事故,使热镀锌机组不能够正常运行,降低产线的生产效率。经全面分析,发现铜滑条断裂变形的主要原因是:(1)铜滑条所选材料的抗拉强度远远低于设计标准所要求的强度;(2)铜滑条端部钩头险截面抗拉横截面积设计过小;(3)液压控制系统工作压力不能精准控制。针对存在的这些问题,采取合理的解决方案,很好地解决了开卷机失效问题。 相似文献
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罗艳萍 《读与写:教育教学刊》2008,5(6)
The communication of people partially is the communication of cultures. Culture has a direct effect on international commercial activities in all aspects. Different conceptions about time, space, equality, law and the like, lead people to deal with things in different ways. So to know cultures of the counterpart is to facil-itate our enterprises so as to have a smooth and successful communication in commercial activity. 相似文献
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Richard Denner 《海外英语》2007,(4):14-15
Rosco and I wait for the fishermen to return.I sit at a wooden bench near the store at Mt.Baker Resort and watch the clouds change shape. Rosco has my belt around his neck and an eight foot tow chain hooked to a tree. Dogs must be on a leash. Ducks and rabbits are loose. 相似文献
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Given a graph G,a subgraph C is called a clique of G if C is a complete subgraph of G maximal under inclusion and |C|≥2. A clique-transversal set S of G is a set of vertices of G such that S meets all cliques of G. The clique-transversal number, denoted as TC (G), is the minimum cardinality of a clique-transversal set in G. The clique-graph of G, denoted as K (G), is the graph obtained by taking the cliques of G as vertices, and two vertices are adjacent if and only if the corresponding cliques in G have nonempty intersection. Let F be a class of graphs G such that F={G|K(G) is a tree}. In this paper the graphs in F having independent clique-transversal sets are shown and thus TC (G)/|G|≤1/2 for all G ∈ F. 相似文献
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《海外英语》2007,(5):10-11
Many college freshmen arrive woefully unprepared to do college work, and as disadvantaged populations continue to grow, the share of the American work force that has made it through college is expected to plummet. Many experts blame that educational failure not just on high schools but also on colleges. School & College, a special report by The Chronicle, looks at efforts to fix the system. What reforms would better prepare students for college? What should schools and colleges be doing differently? How should state and federal officials help? 相似文献
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陈美曦 《山东教育学院学报》2008,23(2):103-107
Different nations have different social cultures, and the social culture of every nation is developing with the development of the nation, language is greatly influenced by social culture, which enables language to possess national and historical characteristics. Word is the smallest, independent, meaningful linguistic unit of language. It can well reflect the national and historical characteristics. From synchronic aspect, the social and cultural influence on word meaning is mainly embodied in conceptual and associative meanings of word. The incorrespondence of word meaning is a phenomenon that exists in both conceptual and associative meanings of word among different languages. From diachronic aspect, the development of social culture causes some changes of word meaning to some extent. Therefore, social culture plays a key role in vocabulary learning and mastery of a language. 相似文献
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邱崇丙 《唐山师范学院学报》2014,(1):21-23
汉字的六书,《说文》对“转注”一类,语焉不详。后世学者提及转注,也仅限于许慎所举出的例字。《汉字例说》一文,作者从转注的角度综合考虑,对部分现代常用字作了分析,跟传统的解释有所不同。希望能抛砖引玉,互相切磋,以推进学术研究。 相似文献
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《海外英语》2007,(4):36
There are numbers of crossroads on our long and unpredictable life journey where we totally have no idea about which direction to choose. No matter what our decision is, we should not turn back, but face the music and go ahead instead. I am this kind of girl who always does try without regretting, one example is how I dealt with my love. 相似文献