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为提高冷轧带钢六辊轧机辊系的稳定性,目前常采用轧辊偏移方法.本文通过ABAQUS有限元软件建立辊系-轧件一体化耦合模型,对不同轧辊偏移辊系进行受力分析,揭示了不同轧辊偏移条件对六辊轧机板形调控特性的影响规律.结果表明,中间辊正向偏移轧制时,工作辊弯辊力对二次凸度调控功效最好,对四次凸度影响较大;在四种偏移方式条件下,中间辊弯辊力在0~300 kN范围内对带钢二、四次凸度调控功效基本相同;中间辊正向偏移轧制时,中间辊弯辊力在300~500 kN范围内对带钢二次凸度调控功效最好;工作辊正向偏移轧制时,中间辊弯辊力对四次凸度影响较大;不同轧辊偏移条件下中间辊窜辊对带钢二次凸度调控趋势基本相同,且负窜辊对二次凸度的调控功效优于正窜辊,工作辊正、反向偏移轧制条件下中间辊窜辊对四次凸度影响较大. 相似文献
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针对某四机架六辊高精度控制辊型(HC)冷轧机组大压下率轧制时弯辊力时常饱和的问题,可将末机架工作辊辊型优化为六次多项式曲线,赋予工作辊正凸度,并适当降低承载辊缝的二次凸度和四次凸度,这样既可以增强轧机板形控制能力,也可以实现对中间辊磨损凸度的在线补偿,降低工作辊弯辊力。工作辊最大凸度优化值应根据轧制品种、轧制厚度和宽度规格、中间辊辊期长短进行综合考量。轧制试验结果表明,在1个中间辊辊期的初始阶段采用平辊型工作辊,中后期阶段采用凸辊型工作辊,可实现中间辊磨损凸度和工作辊初始凸度的良好匹配;连续轧制时弯辊力始终处于良好的调控区间,且对轧制品种和宽规格的适应性明显增强,板形综合值小于8 IU的比例可提升10%以上。 相似文献
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正With the signing of"Letter of intention for Propelling Integration of Shandong Rare Earth Enterprises"between Shandong Province Commission Of Economy and Informatization,China IronSteel Research Institute Group("China Steel Institute"),and China Rare MetalsRare Earth Co.,Ltd("China Rare Earth"),the"Shandong Rare Earth Group"jointly set up by the 3 units thus broke surface.On August 9,reporters of the China Economic Herald learned from Shandong Province 相似文献
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正In the face of the current situation of the lost WTO dispute on rare earth,and cancellation of export tariff for partial rare earth products,efforts of regulation and integration on rare earth by the state government will again be tightened.Reporters of the Economic Information Daily recently learned from authoritative sources that relevant ministries are 相似文献
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正Last month,Chinalco signed framework agreement for strategic cooperation with Harbin Municipal Government in Harbin Xiong Weiping,Chairman of Chinalco,said that based on the strategic deployment to build world top-class mining company with the highest growth potential,Chinalco was now concentrating all efforts on making strategic transition and structural adjustment,strategic cooperation with the local governments where 相似文献
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《China Nonferrous Metals Monthly》2014,(12)
<正>According to the latest info from Jiangxi Province State-owned Assets Supervision and Administration Commission,Jiangxi Copper Corporation was approved to become the first pilot enterprise for deepening reform.Contents of the pilot work is"Three Self"(self expansion,self decision-making,self 相似文献
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