共查询到20条相似文献,搜索用时 687 毫秒
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QMT/C-8000型铁路车辆车轮磁粉自动探伤机的研制 总被引:1,自引:0,他引:1
介绍了铁路车辆车轮(包括新型提速车轮)的磁粉探伤方法及其工艺参数的确定,也介绍了车轮磁粉自动探伤机的结构及其功能。 相似文献
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通过对津西钢铁集团有限公司小规格棒材生产线中3#成品倍尺分段剪剪切精度影响因素的具体分析, 采取在生产线上安装多个热金属检测器、在末架轧机上安装脉冲编码器的方案, 提高了轧件实际线速度的测量精度和飞剪剪切控制精度, 从而有效减少了废品的产生, 提高了成品收得率。 相似文献
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ZHU Xianhua DONG Zengzhang SU Junyi Xi''''an Jiaotong University Xi''''an China 《金属学报(英文版)》1990,3(12):384-390
The solidification process of a horizontally continuously cast gray iron bar of 4.6cm in diame-ter was modelled.The function describing the distribution of heat flux at the internal surfaceof graphite sleeve,which was equal to that on the surface of the iron bar,was inversely derivedusing numerical calculation from the temperature distribution in the sleeve measured in realproduction.By using the distribution of heat flux as a boundary condition on the surface of theiron bar,the numerical simulation on solidification of the iron bar taking longitudinal heatconduction into account was made.The profile of solidification front obtained from the numer-ical simulation was approximately coincident with that in real production.In addition,thequantitative relationships of the thickness of solidified shell at the exit of the mold to the maintechnological parameters,including the temperature of liquid iron at the entrance of the mold,the moving speed of the bar and the intensity of water cooling,were obtained from the numeri-cal simulation. 相似文献
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研制和开发了采用液气联合驱动、径向夹紧的棒料高速剪切机液压系统,介绍了液压大系统建模理论与方法.应用液压大系统建模方法建立了数学模型,构建了仿真模型,对棒料高速剪切机液压系统动态特性进行了建模与仿真研究.实践表明:采用液气联合驱动、径向夹紧的棒料高速剪切机,生产效率高,棒料剪切断面质量得到显著提高.仿真结果表明:液压系统具有良好的动态特性,液压大系统建模方法与理论可广泛应用于液压系统动态特性分析. 相似文献
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介绍了高速线材轧机和合金钢棒材轧机配套用的步进式钢坯加热炉,在炉型、炉子结构、热工制度、节能以及为实现生产操作自动化等采取的技术措施。 相似文献
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