共查询到20条相似文献,搜索用时 78 毫秒
1.
2.
首先推导出了钢板弯曲曲率的计算公式,再根据计算所得的曲率计算钢板在矫直中的塑性变形率,最后根据塑性变形率的要求推导出了矫直钢板最小极限厚度和辊缝设定的计算公式.这对矫直机的设计和实际矫直中的辊缝设定有借鉴意义. 相似文献
3.
分析了HCW轧机内辊缝闭环时弯辊力变化对带材厚度的影响 ;针对西南精密带钢厂HCW 6 5 0mm轧机的实际影响情况 ,回归了在线补偿数学模型。运行结果表明 ,提出的处理方法很好地解决了工作辊轴移和弯辊力变化对带材厚度的影响。 相似文献
4.
5.
6.
中厚板轧制辊缝值的设定方法 总被引:1,自引:1,他引:0
本文介绍中厚板轧机的计算机控制方法,尤其是中厚板高精度轧制辊缝值的设定方法,通过实时厚度最佳分配、轧制过程自适应和轧机弹跳方程得出辊缝设定值,从而达到命中目标厚度和板形平直的目的。 相似文献
7.
矫直机辊缝值的计算 总被引:2,自引:0,他引:2
傅文祖 《上海宝钢工程设计》2000,14(1):13-17
矫直机在矫直板带和型钢等钢材时,其弯曲量和矫直机辊颖的关系,迄今我们尚未发现较简洁、较现成的公式可利用,也没有详细资料和图表可供参考,这对矫直机操作者带来很大困难。本文在分析了钢材处在矫直权中的受力情况后,推导出一个矫直辊辊颖值和理论公式。文中,作者用此数学模型计算了武钢1700热轧厂IHI摆式飞剪十三辊6矫直机的辊缝值,其结果与日方给出的操作图表完全相符,这说明本文所推导的理论公式是正确的,可供 相似文献
8.
9.
10.
11.
12.
以首钢某酸轧机组中拉伸弯曲矫直机为研究对象,介绍了拉伸弯曲矫直机插入量调整装置的设备结构和插入量的标定方法,并利用余弦定理推导出换辊后插入量补偿值的计算公式,为同类拉伸弯曲矫直机的设计及使用提供参考。 相似文献
13.
针对破鳞拉矫机的设备组成及生产工艺特点,开发了以插入量和延伸率控制为核心的自动控制系统.建立了插入量的控制模型,解决了因换辊后频繁标定零点位置以及辊子磨损影响插入量控制精度的问题.采用参数寻优的方法,求解以误差为基础的目标函数得出适配参数,解决了延伸率控制中的参数设置合理性受人为因素影响较大的问题.现场实际应用效果表明:破鳞效果良好,弯曲辊和矫直辊的标定值与计算值的最大偏差均可控制在0.24 mm以内;延伸率控制采用参数寻优前后效果对比明显,设定值为0.9%时,偏差控制精度由±8%提高到±5%,设定值为1.8%时,偏差控制精度由±3%提高到±1%. 相似文献
14.
Roller leveling process of longitudinal profile (LP) plate is hardly studied because plate thickness changes. Deformation characteristics and residual curvature during LP plate leveling process were investigated based on curvature integral by elastic-plastic differences. It was found that entry intermesh section is reduced with increasing thickness and entry intermesh should be from 0.7 to 1.1 mm for LP plate with 42/54 mm in thickness. In order to get satisfactory flatness along longitudinal direction, small entry intermesh should be selected and exit intermesh should be 0 mm. In addition, thickness section for LP plate which can be leveled by 11 roller leveler is from 24 to 60 mm. Finally, there is an intermesh schedule that could level LP plate with initial curvature less than elastic limit curvature. 相似文献
15.
三辊张力单元张力与带钢厚度、材质及压下量关系的研究 总被引:2,自引:0,他引:2
研究了三辊张力单元产生的张力与带钢厚度、带钢材质及压下量的关系,建立了相应的数学力学模型,得出了张力计算式,计算结果与实际值相比较误差很小.其研究结果可用来指导张力单元装置的设计、操作模式的制定,并为解决类似力学课题提供了参考. 相似文献
16.
17.
The development of design criteria for lunar structures must begin soon in order to establish adequate criteria. Some of the items that need consideration in such criteria are discussed. The categorization of the structures will provide designers with information on the purpose and level of complexity of the structure. Various construction materials and structure types that will be critical for the design of lunar structures, are considered. The environment of the moon and its possible effects on structures are presented and lead to the development of a few load cases that need to be considered in design. A probabilistic format for the criteria and design lifetimes are also discussed. 相似文献
18.
Benjamin P. Thompson Stuart D. Anderson Jeffrey S. Russell Awad S. Hanna 《Canadian Metallurgical Quarterly》2002,18(3):129-137
This paper presents guidelines for implementing the construction warranty contracting method in the highway construction industry. A logical, step-by-step method for effectively applying the warranty contracting program for use in the highway construction industry is developed. Relevant issues that may present obstacles to the implementation are addressed, while the best practices, compiled from an evaluation of the current industry’s state-of-the-art practices, will assist an interested state highway agency in creating a warranty specification. In performing this research, the current use of warranty specifications among state highway agencies was examined, and an in-depth case study of the Wisconsin Department of Transportation’s warranty program was conducted. 相似文献
19.
20.
本文对低压锅炉锅水中的结垢物、硬度、碱度、投入的药剂等,在高温运行条件下的化学反应过程进行了理论分析,为控制锅水中各项主要指标达到水质标准和防止水垢的结生,提供了科学依据. 相似文献