压边浇口在铸铁滑轮上的应用

通过应用压边浇口代替普通浇口，消除了缩松缺陷，获得了满足客户质量要求的铸铁滑轮铸件。     

双辊铸轧薄带钢过程铸轧力计算的数学模型

 在双辊铸轧薄带钢过程中,铸轧力的控制是铸轧过程稳定进行和提高薄带质量的关键。为了控制铸轧力,必须建立铸轧力控制数学模型。基于经典轧制理论,采用工程法推导出铸轧过程中熔池区域微元体静力平衡微分方程,根据凝固终点位置即可给出铸轧过程中单位压力分布,进而给出铸轧力计算的数学模型,为铸轧力的在线控制奠定了基础。     

385气缸体的铸造工艺探讨与生产实践

介绍了两种缸体的结构特点,分析了气缸体常用的传统铸造工艺方案的不足及两种３８５气缸体采用一箱一件生产方案成本高的缺点,较详细地阐述了两种３８５气缸体一箱两件生产方案的特点及应用工艺研究所获得的铸件最终合格率达到８５％以上。     

压边浇冒口对铸件质量的影响

在使用压边浇冒口的生产实践中，由于化学成分、浇注温度、压边宽度、长度和冒口体积等选取不当，易造成铸件顶面凹陷、冒口根部缩孔、缩松等缺陷。对此进行了具体分析并提出了解决措施。     

六辊轧机薄带轧制过程辊端压靠治理技术的开发

针对六辊轧机薄带轧制过程中工作辊在板宽以外容易出现辊端压靠,以及压靠发生后影响产品板形与板厚控制精度、增加辊耗的问题,经大量现场试验与理论研究,并结合六辊轧机的设备与薄带轧制的工艺特点,从辊型曲线的优化设计入手,提出了一套适合于六辊轧机薄带轧制过程辊端压靠治理技术,有效治理了辊端压靠,提高了带材的厚度控制精度(或延伸率控制精度),同时改善了成品的板形质量,减轻了因中间辊窜动而引起的辊间压力分布不均匀、出现尖峰分布等因素带来的副作用,使轧辊使用寿命得到提高。相关技术已应用于某冷轧薄板厂1220UCM平整机组的生产,使用效果良好,具有进一步推广应用的价值。     

Rolling force prediction for strip casting using theoretical model and artificial intelligence

Rolling force for strip casting of 1Cr17 ferritic stainless steel was predicted using theoretical model and artificial intelligence. Solution zone was classified into two parts by kiss point position during casting strip. Navier-Stokes equation in fluid mechanics and stream function were introduced to analyze the rheological property of liquid zone and mushy zone, and deduce the analytic equation of unit compression stress distribution. The traditional hot rolling model was still used in the solid zone. Neural networks based on feedforward training algorithm in Bayesian regularization were introduced to build model for kiss point position. The results show that calculation accuracy for verification data of 94.67% is in the range of ±7.0%, which indicates that the predicting accuracy of this model is very high.     

Cast-rolling force model in solid−liquid cast-rolling bonding (SLCRB) process for fabricating bimetal clad strips

Based on twin-roll casting, a cast-rolling force model was proposed to predict the rolling force in the bimetal solid?liquid cast-rolling bonding (SLCRB) process. The solid?liquid bonding zone was assumed to be below the kiss point (KP). The deformation resistance of the liquid zone was ignored. Then, the calculation model was derived. A 2D thermal?flow coupled simulation was established to provide a basis for the parameters in the model, and then the rolling forces of the Cu/Al clad strip at different rolling speeds were calculated. Meanwhile, through measurement experiments, the accuracy of the model was verified. The influence of the rolling speed, the substrate strip thickness, and the material on the rolling force was obtained. The results indicate that the rolling force decreases with the increase of the rolling speed and increases with the increase of the thickness and thermal conductivity of the substrate strip. The rolling force is closely related to the KP height. Therefore, the formulation of reasonable process parameters to control the KP height is of great significance to the stability of cast-rolling forming.     

极薄带钢平整轧制过程辊型改造方案的研究

针对薄窄料平整轧制过程中易出现的工作辊之间辊端压靠及工作辊与支承辊之间的有害接触问题,以宝山钢铁股份有限公司冷轧薄板厂1220平整机组为研究对象,以控制压靠影响与消除辊间有害接触区,同时保证成品机械性能与板形质量为目标,提出了一套针对极薄带钢平整轧制的辊型设计数学模型,给出了相应的辊型改造方案,并以现场典型规格产品为例,通过对比试验验证了辊型改造的效果。目前,该辊型改造方案已作为工艺规程投入现场使用,取得了良好的使用效果。     

直缝焊管开口孔型接触压力研究

根据全息光弹实验结果得出的轧辊接触压力分布规律并利用能量守恒原理和轧压理论,对直缝焊管开口孔型轧辊的接触压力进行了计算,表明理论计算值与实测值比较接近。     

双枝模糊集(Ⅰ)

提出双枝模糊集Ｓ的理论．双枝模糊集Ｓ是如下的概念：ｘ∈Ｘ与定义在Ｘ上的双枝模糊集Ｓ的关系Ｓ（ｘ）满足：Ｓ（ｘ）∈［－１,１］,Ｓ（ｘ）称作元素ｘ关于双枝模糊集Ｓ的模糊接吻函数,对于确定的ｘ０∈Ｘ,Ｓ（ｘ０）称作双枝模糊集Ｓ的模糊接吻度．１９６５年杰出学者Ｌ．Ａ．Ｚａｄｅｈ将元素ｘ∈Ｘ与定义在论域Ｘ上的普通集Ａ∈Ｐ（Ｘ）之间的关系由χ（ｘ）Ａ∈｛０,１｝扩充到μ（ｘ）Ａ～∈［０,１］;χ（ｘ）Ａ是特征函数,μ（ｘ）Ａ～是隶属函数;由此Ｌ．Ａ．Ｚａｄｅｈ提出模糊集并给出模糊集的一般理论,这是一项杰出的学术贡献．在Ｌ．Ａ．Ｚａｄｅｈ提出的模糊集Ａ中,ｘ∈Ｘ与Ａ的关系μ（ｘ）Ａ～定义在［０,１］上,或者说Ｘ上所有的元素ｘ与Ａ的关系μ（ｘ）Ａ～都取正值．在工程决策与工程控制中存在这样的事实：Ｘ上有些元素ｘｉ与Ａ的关系是μ（ｘｉ）Ａ～∈［０,１］,Ｘ上另有一些元素ｘｊ与Ａ的关系是μ（ｘｊ）Ａ～∈［－１,０］,Ｘ上还有一些元素ｘｋ与Ａ的关系是μ（ｘｋ）Ａ～＝０．ｘｊ∈Ｘ这类元素在模糊决策,模糊控制中是非常重要的一类元素,它们起着举足轻重的作用,不可以丢掉．上面的简单事实,是作者提出双枝模糊集Ｓ理论的根据．为了研究方便,