共查询到17条相似文献,搜索用时 109 毫秒
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冷轧钢卷最大约束反力分析 总被引:1,自引:0,他引:1
根据冷轧钢卷外周钢带的边界约束条件,采用三维应力和微积分分析的方法,得出钢卷最大约束反力的计算公式;最大约束反力与钢卷厚度的平方、宽度和抗拉强度成正比、与钢卷外径成反比。在一般冷轧机组设备生产能力下,钢卷最大约束反力随钢卷材料抗拉强度的增加而递增。在给定的生产能力下,通过计算出钢卷最大约束反力的极限值,为钢卷打捆工艺制定和捆带材质选择提供依据,以有效避免钢卷内捆带失效的情况发生。 相似文献
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将鞍钢附企冷轧金属制品厂生产的包装用捆带的各项技术条件与宝钢生产的捆带进行对比,从中找出鞍钢的捆带自身的质量问题及产生原因,并根据鞍钢目前资金短缺的具体情况,对鞍钢现有的包装用捆带生产机组的部分工艺和设备提出了较为可行的改进措施。 相似文献
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目前邯宝冷轧厂镀锌线采用先进的连续热镀锌工艺,在生产线出口有自动打捆机,保证钢卷打捆后直接运输到包装线进行包装,此设计工艺省时省力省人工,具有很大的优越性,但是使用的捆带硬度偏高,同时打捆机夹紧剪切单元的结构设计不能满足强度上的使用要求,自动打捆机在对成品镀锌钢卷的打捆过程中,多次出现夹紧剪切单元的剪刃崩裂、夹钳断裂以及移动剪刃动作不到位剪切不断捆带故障,导致打捆机不能自动打捆。基于此通过分析研究,对打捆机进行了优化改进,有效防止剪切单元问题发生。 相似文献
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1前言捆带,俗称“铁腰子”,在冷轧厂的各生产工序钢卷打捆和成品包装中都离不开它。如果在各生产工序中打捆的捆带断带,不仅影响生产作业率和产品的成材率,同时也会影响产品的质量。如果成品包装的捆带断带,则要影响产品的声誉和市场竞争力,甚至还要影响企业的经济... 相似文献
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Sundwig研制了一种新型钢卷捆带自动拆除装置。它装在光亮退火机组的进口区,共设两台拆卷机拆除捆带。这套装置可不借助人力实行自动操作。 紧凑的机头允许横向和旋转运动,并可自动测定卷边和捆带的位置。捆带用剪机切断,并卷成 相似文献
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Advances in material technology allow for the exploration of new structural forms and systems. In recent years, fiber-reinforced polymers (FRPs) have emerged as candidate materials for civil engineering applications, and the use of FRPs in construction has been an area of growing interest. Unidirectional high-strength FRPs are well-suited for use as tensioning elements, but anchorage details present a challenge. An alternative is to self-anchor the FRP tensioning element by winding thin layers of material around supports and then laminating all the layers together (a laminated strap) or by securing only the outermost layer to form a closed outer loop while the inner layers remain nonlaminated (a nonlaminated strap). Nonlaminated FRP straps have been found to have higher efficiencies than equivalent laminated straps, which is advantageous in high-tension applications. The suitability of nonlaminated FRP straps for use as unbonded tension elements provides scope for use in new construction and for the strengthening of existing structures. A review of nonlaminated carbon FRP strap system properties and applications in the context of reinforced concrete, timber, and masonry structures is presented. 相似文献
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从弓长岭井下铁矿的实际应用出发,提出了“无底柱分段崩落法沿脉进路大断面出矿”研究方案(即巷道高度不变。增加出矿进路的断面宽度),以增加矿石流动带,减少大块堵塞.实现全断面出矿,提高矿石回收率,降低混岩率。通过实验室物理模拟实验,详细分析了大断面进路出矿的各种方案,总结了大断面进路出矿的优点及改进方向。把大断面出矿进路应用于鞍钢弓长岭井下矿,矿石回收率比以前采用小断面进路出矿时有明显提高。证实了大断面出矿进路在放矿方面的有效性及优越性。 相似文献
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One promising means of increasing the capacity of existing shear-deficient beams is to strengthen the structure using external prestressed carbon fiber reinforced polymer (CFRP) straps. In this system, layers of CFRP tape are wrapped around a beam to form a strap that acts like a discrete unbonded vertical prestressing tendon. Experiments were undertaken to investigate the influence of the strap spacing, the strap stiffness, the initial strap prestress level and/or any preexisting damage on the strengthened behavior, and mode of failure. An unstrengthened control beam was tested and failed in shear. In contrast, all of the strengthened beams showed a significant increase in their ultimate load capacity with several of the strengthened beams failing in flexure. A number of different failure modes were noted and initial guidelines on the design parameters that influence the propensity for a particular failure mode were developed. 相似文献
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化工公司二期脱硫解吸塔填料国产化 总被引:1,自引:1,他引:0
化工公司二期脱硫解吸塔吸入运行以来,日本填料的使用效果不理想,探讨用国产填料替代日本填料,从而做到优质,耐蚀,低成本,以满足生产需要。 相似文献