彩色涂层钢板生产线的非标机械设备

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。     

热镀锌开卷机涨缩系统失效分析

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。     

硬币清分计数包装一体机的设计

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.     

浅谈天然气净化装置腐蚀因素及对策

本文综述了天然气净化装置存在的几种主要腐蚀的类型,并针对天然气处理装置腐蚀情况,提出了加强对设备防腐蚀的基础管理、加强技术改造、采取内涂层处理和外部防腐处理措施等防腐对策.     

对化工机械设备润滑相关问题的探讨

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.     

浅谈重介选煤厂自动化控制设计

选煤厂生产工艺环节多、程序复杂,且采用大量机械设备.在生产过程中,因各种设备必须按照一定的工艺程序进行运转而要监视其运行状态,且各种工艺参数需及时检测,以调整到规定的范围内.论文根据开滦林西煤矿选煤工艺过程,阐述了控制系统的设备配置、功能设置和应用特点.印证了实现自动化可说是实现选煤现代化的必要技术手段.     

电弧喷涂工艺参数对4Cr13合金涂层结合强度的影响

以雾化空气压力、喷涂电压、喷涂电流和喷涂距离等4个电弧喷涂主要工艺参数为因素进行正交试验,每个因素设置3种水平。采用自主研发的新型4Cr13合金药芯丝材,通过高速电弧喷涂设备在Q235钢板上制备涂层,分别考察这些参数对涂层与基材结合强度的影响规律,从而获得基于结合强度的最优电弧喷涂工艺参数,为制备高综合性能的涂层打下良好基础。     

冷轧热镀锌产线开卷机失效分析与改进

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。     

火焰喷涂镍石墨/镍铝丝涂层的工艺应用研究

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.     

开卷机的恒张力控制

讨论了开卷机在镀锌生产线中的开环张力控制,并详细论述了通过在PLC中设置变频器的参数来实现开环张力控制.     

卡思卡特城堡

It is worthy of noting that, whilst Crookston Castle witnessed the earlier and happier portion of Mary's variegated life,     

不同的吃喝玩乐

一、吃和喝吃苹果 eat an apple, 吃药 take medicine,吃糖 have some sweets,吃饭 have one's meals,吃馆子 dine out,吃惊 be surprised/     

漏洞百出的教育

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?     

Western and Eastern culture differences in commercial field

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.     

只要努力,不要后悔

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.     

浅谈移民问题

Migration occurs behind a variety of reasons and has a great effect on the whole world. People may migrate in order to improve their economic situation, or in order to escape civil strife, persecution, and environmental disasters. The impact of migration is complex, bringing both benefits anddisadvantages. This paper briefly talks about the causes of migration, the allocation of benefits, and the ways in which individual countries and the international community deal with this important subject.     

Sister Carrie, an Adherent of Desires

Sister Carrie is one of the most controversial characters in American literature.Thought as a "fallen woman" firstly,she was defined as a "new woman" by some critics later. However, by digging into the motivaton behind the whole process of Carrie's "success", the relationship between Carrie and her creator (the author), the social conditions of then American, it can be found that Carrie has never been free-standing on her thought and she has never found her real-sdf even after becoming a famous actress. In a society dominated by mass consumerism Carrie is only an adherent of her own desires. She also is a representative of all those country girls flooded into cities, a symbol and a sacrifice of the urbanization of America in a time countryside was overcome by cities.     

Improvement of one-cycle controller by use of proportional integral differential controller

1.IntroductionOne-cyclecontrolmethod,whichwasproposedaboutonedecadeago[1],hasbecomeanattractivemethodinspecialfieldssuchaspowerfactorcorrection[2-6],switchingamplifiers[7,8],etc.Themainideaofthiscontrollerisbasedonintegrationofdiodevoltageinone-cycleandforcesittobeexactlyequaltothereferencevalue.Themainadvantageofthiscontrollerisitsrealtimeabilitytorejectthevariationofinputvoltage[1].Despitethisgreatability,ithasnogoodperformancesinrejectingofloaddisturbanceandfollowingreferencecommands.Espec…     

风的曲线

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.