共查询到18条相似文献,搜索用时 46 毫秒
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安钢高线机组的高速区布置与传统的10机架不同,为8+4布置,其工艺技术水平达到了世界先进水平,本文介绍了安钢高线机组在精轧机组孔型系统优化方面的成绩。 相似文献
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江新钢铁总厂线材机组粗轧孔型系统第一、二道次由原来的平箱形孔—立箱形孔改为凸度六角孔—方形孔后,有效地增大了粗轧的延伸系数,提高了轧件尺寸精度,减少了事故和调整难度。本文介绍改造的依据、实践和效果。 一、原粗轧孔型存在的问题 相似文献
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阐述了以动态法按最小总张力系数对高速线材轧机精轧机组孔型进行优化设计的方法与实例。结果表明,此优化设计方法可使机架总张力系数下降约58%,为提高产品尺寸精度提供了保证。 相似文献
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孔哲 《冶金设备管理与维修》2013,(2):47-53,56
文章结合酒钢高速线材生产实际,提出了孔型设计的方法、粗中轧轧制程序表,并采用刚塑性有限元法对粗中轧过程进行了模拟分析,提出了相关的量能与变形参数。 相似文献
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从线材厂的生产实际出发,对生产线材成品折迭的原因进行了分析,并采取了改造粗轧孔型系统的相应措施,改善了线材成品质量。 相似文献
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介绍珠海粤裕丰钢铁公司棒线轧钢厂粗中轧棒、线孔型共用的工艺特点、孔型设计等相关参数,并分析了孔型共用所带来的效益.通过近三年的实践证明,该技术在降低备件成本、降低备件资金积压、提高产品质量、减少劳动量、提高生产效率等方面,均取得显著效果. 相似文献
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概述了中板板型控制的意义和国内外板型控制现状,阐述了济钢中板厂粗轧机板型控制现状,并针对现状进行了深入的研究,确定了主要影响因素。采取相应的解决措施后,粗轧机中间坯双鼓形缺陷得到较好改善,减少了板边切损,取得了显著的经济效益。 相似文献
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Conny Eriksson 《国际钢铁研究》2004,75(12):818-828
Surface defects in wire rod and bar rolling are common and well‐known to mill people. Nowadays, surface defects are not accepted on high‐alloyed steel wire rods. The steel making, casting and rolling processes give rise to defects. Also, the final handling of the wire and bar can destroy the surface. In this work, artificial V‐shaped cracks in the longitudinal direction were investigated for different reduction series. The false round‐oval series are known as a series for high quality steels and are usually better than square–oval series. Experiments confirmed that in the false round‐oval sequences a surface crack in the groove bottom may open up during rolling at the same time as its depth is reduced, which is a beneficial situation. Surface cracks found at 45° to the rolling direction, at groove “corners” and on free surfaces will be closed or reduced in depth. The closing of cracks is detrimental since the cracks usually hide rolled‐in oxides beneath the bar surface. The experiments showed that for the subsequent oval–false round sequence the visible crack at the groove bottom will be closed and become shallower. The cracks at 45° and on the free sides will also be closed, but deeper causing a serious surface defect. An FE‐analysis was carried out, explaining the experimental results. Flat oval grooves are better than round ovals and false rounds are superior to square for opening and decreasing the depth of a longitudinal crack. It is difficult to eliminate a surface defect constituting a closed crack. 相似文献
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酒钢不锈钢热轧粗轧控制系统采用分布式控制思想,硬件PLC为SIEMENS SIMATIC TDC,远程I/O为SI-EMENS SIMATIC ET200M,Profibus组态,软件程序开发使用SIEMENS PCS7工具,人机接口HMI采用SIEMENSWINCC。实际运行中稳定、可靠、方便,达到了预期的效果。 相似文献