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刘国昌 《机械制造与自动化》2009,38(3):75-76,83
在研究仿真技术的基础上,对振动压路机振动偏心机构进行了原理分析和结构设计;研究了三维建模软件Pro/E和动力学仿真分析软件ADAMS的接口技术,实现了二者的联合仿真;重点对挡销和活动偏心块之间的激振力进行了仿真分析,并进行测量;实践表明,仿真技术恰当的应用于工程机械的设计中能够提高生产效率和缩减不必要的开支,不失为一种提高产品竞争力的有效方法. 相似文献
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偏心轴套在弧面分度凸轮机构中的应用 总被引:2,自引:0,他引:2
介绍了一种调整弧面分度凸轮机构中心距的方法.利用偏心轴套的偏心特性,实现了弧面分度凸轮机构中凸轮位置的移动,可以对弧面分度凸轮机构的中心距进行调整,在装配中使弧面凸轮与分度盘获得优良的配合,或对凸轮与滚子的磨损进行补偿,从而使弧面分度凸轮机构获得良好的动力特性和运动特性,实现了机构的连续、平稳、高速运转. 相似文献
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在箱体类零件加工过程中,有相当多的孔与端面的加工要求。根据斜面机构原理以及螺旋偏心原理,研发了两类机构,即实现刀具径向进给的特殊装置。在实际的应用中,因该装置结构合理,不仅适用于通用镗削类机床,满足小批量生产,还适用于专用机床,满足大批量生产的要求,具有良好的实用性与推广性。 相似文献
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施于杭 《机械工人(冷加工)》1998,(5):24-24
本厂生产的细木工镂锯机采用电动机作动力,通过偏心轮、连杆机构带动双摆杆作上、下摆动。在上、下摆杆头部装有锯条夹头体用于夹紧锯条。 该机用以锯割板材上的封闭或开口直面、曲面图形。锯割封闭图形时,需先在画有切割标记线内钻一 相似文献
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车削螺纹是多次走刀后才完成的,因此螺纹车床除应具备螺纹的成形运动而外,还应具有进刀(切入)运动。此运动在一般的自动或半自动螺纹车床中,大都采用棘爪、棘轮和端面台阶凸轮机构来实现车刀的多次进退动作。但是当被加工工件的螺纹牙高变更则原有的端面台阶凸轮就必须更换;特别是在车削高强度材料的大螺距螺纹(牙高大的 相似文献
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起重机运行车轮水平偏斜值是重要的技术参数,本文介绍了能调整车轮水平偏斜值的偏心轴承箱车轮组的基本原理和特点。 相似文献
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针对我国目前高精度冷轧窄带钢轧机研制和产品供求关系现状以及对冷轧窄带钢质量,品种新的需求,着重介绍了国内外冷轧带钢轧机设计选型,关键机械零件制造,板形控制等方面的新技术发展特点和设计要求,阐明了对新技术的应用原则和建议。 相似文献
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介绍ERP系统的概念,应用ERP系统的企业背景,该系统将冷轧生产供应链划分为多个模块,各个模块数据信息资源传递及时准确,模块之间的相互贯通组合共享形成了多种功能,实现了资源的最优化调配,理顺了企业的供应链管理,使得企业的运行效率和管理水平得到很大的提升。 相似文献
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冷、热连轧机液压系统污染度的控制 总被引:4,自引:0,他引:4
从液压油污染的形态,液压油污染的来源,液压系统污染的原因及危害性,液压油污染度的检测和过滤器滤芯的更换,液压元件和系统的污染度等级等方面对液压系统的污染度进行分析,提出了冷、热连轧机液压系统污染度控制的具体措施,对从事冷、热连轧机液压系统设计、制造和实际使用维护的工程技术人员有其实际的启发作用。 相似文献
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单机架可逆轧机在国内外轧钢厂广泛应用,但其结构形式各不相同,介绍一种四辊轧机,对其结构、工作原理进行阐述。 相似文献
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There are many intermediate web guides in cold rolling mills process such as CRM (cold rolling mill), CGL (continuous galvanizing
line), EGL (electrical galvanizing line) and so on. The main functions of the web guides are to adjust the center line of
the web (strip) to the center line of the steel process. So they are called CPC (center position control). Rapid process speed
cause large deviation between the center position of the strip and the process line. Too much deviation is not desirable.
So the difference between the center position of the strip and the process line should be compensated. In general, the center
position control of the web is obtained by the hydraulic driver and electrical controller. In this paper, we propose modelling
and several controller designs for web-guide systems. We model the web and guide by using geometrical relations of the guide
ignored the mass and stiffness of the web. To control the systems, we propose PID controllers with their gains tuned by the
Ziegler-Nichols method, the H∞ controller model-matching method, and the coefficient diagram method (CDM). CDM is modified
for high order systems. The results are verified by computer simulations. 相似文献
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The existing research of the flatness control for strip cold rolling mainly focuses on the calculation of the optimum adjustment of individual flatness actuator in accordance with the flatness deviation,which can be used for general flatness control.However,it does not work for some special rolling processes,such as the elimination of ultra single side edge-waves and the prevention of strip break due to tilting roll control overshooting.For the purpose of solving these problems,the influences of non-symmetrical work roll bending and intermediate roll bending on flatness control were analyzed by studying efficiencies of them.Moreover,impacts of two kinds of non-symmetrical roll bending control on the pressure distribution between rolls were studied theoretically.A non-symmetrical work roll bending model was developed by theoretical analysis in accordance with practical conditions.The model was applied to the revamp of a 1250 6-H reversible universal crown mill (UCM) cold mill.Theoretical study and practical applications show that the coordination utilization of the non-symmetrical work roll bending control and tilting roll control was effective in flatness control when there appeared bad strip single side edge waves,especially when the incoming strip was with a wedge shape.In addition,the risk of strip break due to tilting control overshooting could be reduced.Furthermore,the non-symmetrical roll bending control can reduce the extent of uneven distribution of pressure between rolls caused by intermediate roll shifting in flatness control and slow down roll wear.The non-symmetrical roll bending control technology has important theoretical and practical significance to better flatness control. 相似文献