槽钢计算机辅助孔型设计

针对现场实际情况，采用常用的变形模型及力能参数模型，应用Ｃ语言进行程序设计，在此基础上采用Ａｕｔｏ－ＣＡＤ软件设计出一套实用的槽钢ＣＡＲＤ系统。     

轻型槽钢蝶式孔型设计

邯钢发明专利“轧制槽钢的蝶式孔型系统”中平轧弧形切深孔和弯腿蝶式槽形孔型侧壁斜度大、切槽浅、轧件好脱槽、使顶上卫板、缠辊事故大大减少,显著延长了轧槽使用寿命和换辊周期,提高了轧机作业率与机时产量,降低了辊耗与能耗,并可减少断辊事故,经济效益十分显著。该项技术应用于轻型槽钢的轧制时,技术上的优越性更加充分地显露出来。     

24号耐候槽钢的孔型设计

武钢生产的耐大气腐蚀用钢板，用于铁路车辆制造取得了较好的效果，但普碳钢生产的车辆槽钢大梁却严重限制着车辆使用周期的延长。为此大型厂组织开发了耐候槽钢作为铁路车辆的配套材料，既满足了市场的需求，又为公司创造了可观的经济效益。本文对耐候槽钢的孔型设计进行了较为详细的介绍。     

28#槽钢孔型设计

本文主要介绍在φ８００轧机上采用２５０°连铸方坯轧交大型号的２８＃槽钢的孔型设计方法、孔型系统的选择和各参数的确定以有为确保产品质量所采取的措施。     

[8#槽钢的孔型设计

阐述了马钢二轧厂［８＃槽钢的孔型设计方法，包括坯料、孔型系统的选择，成品孔、槽式孔、切深孔的设计等。     

坯料切换中的槽钢孔型修改设计特点

分析了原孔型系统及其在生产中存在的问题，并介绍了坯料切换中孔型修改设计的特点和生产情况。     

40a槽钢孔型设计

介绍了河钢唐钢型钢厂为满足市场需求,在经典孔型理论的基础上,辅以有限元模拟工具,开发大规格槽钢孔型系统的过程。该系统在大型钢生产线应用后,实现了400 mm高大规格40a槽钢的稳定批量生产。其成品孔、控制孔及切分孔孔型设计方法及侧壁斜度的选择,为高度300 mm以上大规格槽钢孔型设计提供了参考。     

15~#薄壁槽钢的孔型设计和轧制

结合济钢中型轧钢厂的生产实际,试制生产１５＃薄壁槽钢。１９９９年７月一次投产成功,共生产１０７１ｔ,合格率达９９.３７％,成材率达９０．４６％。     

简单断面型钢计算机辅助优化孔型设计

介绍长钢一轧厂结合本厂实际,采用计算机,对其开坯孔型进行辅助优化设计,改造原轧制工艺,提高了轧机的机时产量,减少了中间热废,降低了轧辊消耗。     

单机架初轧机轧制圆钢孔型系统优化

针对单机架初轧机轧制圆钢设计出一种多角孔型系统，介绍了该系统的设计及优化过程，通过实施，提高了轧机作业率。     

[20a槽钢孔型及调整技术的优化

介绍了[20a槽钢成品腿尺寸波浪短导致负偏差轧制难度大的现状,分析了问题产生的原因,通过采取孔型优化及调整技术优化措施,成材率提高了1．5％。     

辊式型钢矫直机的设计与计算

简单地介绍了辊式型钢矫直机的常见辊系、结构型式、组成,详细地阐述了该类设备基本参数的确定和力能参数的计算。其具体的设计计算方法可用于有类似工作原理的设备设计计算参考,同时也为该类设备的总体设计的程序化提供了专业资料。     

微张力减径机孔型设计和轧制表计算方法

根据鞍钢无缝钢管厂Φ100机组实际,详细介绍了其孔型设计方法及其应用,以及轧制表计算公式和电机转速、力能参数的计算.     

有限元数值模拟方法在连轧管孔型设计中的应用

介绍了有限元法在连轧管孔型设计中的应用,分析了全浮芯棒连轧时金属流动特性,讨论了轧辊工作直径的确定方法.针对难轧钢种的钢管连轧,以减轻钢管内表裂纹缺陷为目标,借助于有限元数值模拟对连轧孔型进行了优化设计.试轧结果表明,新设计的孔型使T91钢管的内表缺陷大幅下降,经高压锅炉管精整线超声波探伤检验,合格率(绝对值)提高36.77%,对难轧钢种具有很强的适应性.     

Optimal Design of Open Channel Section Incorporating Critical Flow Condition

The flow at critical condition of an open channel is unstable. At critical condition, a small change in specific energy will cause abrupt fluctuation in water depth of the channel. This is because the specific energy curve is almost vertical at critical state. Therefore, if the design depth of the channel is near or equal to critical depth of the channel, the shape of the channel must be altered to avoid a large fluctuation in water depth. In the present study, a nonlinear optimization model is presented for designing an optimal channel section incorporating the critical flow condition of the channel. The optimization model derives the optimal channel section at a desirable difference from the critical condition of the channel so that a small change in the specific energy of the channel will not cause an abrupt change in flow depth. The objective of the optimization model is to minimize the total construction costs of the channel. Manning’s equation is used to specify the uniform flow condition in the channel. The developed optimization model is solved by sequential quadratic programming using MATLAB. Applicability of the model is demonstrated for a trapezoidal channel section with composite roughness. However, it also can be extended to other shapes of channel.     

Numerical Simulation and Sensitivity Analysis of Parameters for Multistand Roll Forming of Channel Section With Outer Edge

 Cold roll forming is a high production but complex metal forming process under the conditions of coupled effects with multi factor. A new booting finite element method (FEM) model using the updated Lagrangian (UL) method for multistand roll forming process is developed and validated. Compared with most of the literatures related to roll forming simulation, the new model can take the roll rotation into account and is well suited for simulating multistand roll forming. Based on the model, the process of a channel section with outer edge formed with twelve passes is simulated and the sensitivity analysis of parameters is conducted with orthogonal design combined FEM model. It is found that the multistand roll forming process can be efficiently analyzed by the new booting model, and sensitivity analysis shows that the yield strength plays an important role in controlling the quality of the products.