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运用轴承预紧理论对国产45°无扭精轧机轧辊轴轴向窜动故障进行了全面分析,对轴承预紧与轴向窜动的关系进行深入阐述,并从实际出发,提出了轧辊轴轴承组件预紧控制和调整方法。 相似文献
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如何防止万能轧机轧制钢轨的过程中,轧辊轴承座不出现轴向窜动现象,与保持板的合理设计和正确维护有至关重要的作用.本文针对近几年来保持板频繁发生的故障现象进行了原因分析,提出改进了方案,并应用到生产实际中,取得显著效果. 相似文献
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应用离心铸造方法,研制CrMoWVNb白口铸铁轧辊。分析合金元素在轧辊中的作用及裂纹产生原因,提出了消 除裂纹措施并应用于高速线材轧机预精轧机架,使用寿命达到高镍铬无限冷硬铸铁轧辊的4~5倍。 相似文献
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螺杆轴向窜动误差是影响螺旋传动精度的重要因素之一,螺杆轴向窜动误差呈周期性变化.最大的轴向窜动误差计算公式为△max=Dtanamin,对于αmin为什么取最小者,文献资料上并没有具体分析,针对此问题分三种情况展开分析了螺杆轴肩端面、轴承止推面的形位误差对螺旋传动精度的影响,进一步完善了最大轴向窜动误差的理论计算公式. 相似文献
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汤超 《传动技术(上海)》2006,20(2):44-48
冶金工业使用的高速线材精轧机机械传动复杂,精度高,速度快,其集中润滑系统(包括轴承、齿轮等)需要专用的油膜轴承润滑油.本文介绍了高速线材精轧机油膜轴承油的研制过程与应用,主要包括高速线材精轧机油膜轴承油基础油、添加剂配方的筛选,分别从理论上进行了论述,以正交试验方法确定最佳配方,并以充分的实验数据进行了验证,研制出高速线材精轧机油膜轴承油;其性能达到了美钢联136规格要求. 相似文献
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《Journal of Mechanical Working Technology》1980,3(3-4):219-238
Some of the methods and equipment used in the steel industry for the securing of increased efficiency are discussed. Particular reference is made to continuous casting, covering such aspects as: working of the cast slab; the combination of continuous casting and edge rolling; slitting of wide slabs; widening of slabs; pre-forming of sections, etc. The paper goes on to consider typical rolling mills for both high and low capacity, reporting on: a high-capacity bar mill; a high-capacity rod mill; a bar mill — mini mill; a wire mill for special steels; a mill for hollow bars, with further reference to pass schedules, roll material, tolerances — automatic gauges, cooling beds, etc. Proposals for securing higher utilization are suggested. 相似文献
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To investigate a correlation between the amount of wear and roll gap (pass height) adjustment, we performed a single-stand
reversible pilot groove rolling test as well as rolling test in an actual rod mill. In case of the pilot rolling test, we
designed wear contour (profile) and machined it on the original roll groove (i.e., roll groove with no wear) to make the roll
groove worn down. For the actual rod mill test, we developed a measuring device which can detect the actual wear profile.
To determine the amount of roll gap adjustment, we propose a model for equivalent roll gap decrement which reduces the increased
exit cross sectional area due to wear. We applied the proposed model to multi-stand rolling (roughing train of POSCO No. 2
Rod Mill) as well as single-stand reversible rolling. The wear profile of rolls worn down at each stand in mill yard was measured
at different roll tonnage.
The pilot hot rolling test shows that variation of exit cross sectional area is almost linearly proportional to roll gap change
while the roll gap decreases from reference roll gap (6.5mm) to 3.5mm. In an actual rod mill which has consecutive rolling
system, relationship between tonnage (total amount of tons that the produced rod weighs) and roll gap change at a stand is
dependent on the rolling type (oval-to-round or round-to-oval) together with the cross sectional shape of incoming workpiece. 相似文献
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文中介绍了包钢159连轧工程中,从穿孔机(CTP)到三辊连轧管机(PQF)之间的横移小车(天车系统),阐述了横移小车的结构组成、工作原理以及重要构件的计算与分析等。 相似文献
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J. B. Hawkyard W. Johnson J. Kirkland E. Appleton 《International Journal of Mechanical Sciences》1973,15(11):873-893
Analyses are developed for predicting roll force and torque during ring rolling between plain cylindrical rolls. A nomograph is given to allow easy application of the theory. Conventional analyses for flat rolling are not generally appropriate to ring rolling, whereas the present theory considers the particular roll geometry and rolling conditions encountered in the process.Measurements of roll force and torque, taken during ring rolling experiments, are shown to be in good agreement with the theoretical predictions. The experiments are carried out on a new experimental mill having a mandrel which retracts axially for loading and unloading the ring, and is symmetrically supported between roller bearings within a four-column frame during rolling. This arrangement is believed to offer certain advantages over most commercial machines. 相似文献
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本文阐述了国产高速线材轧辊箱常见故障,并进行原因分析,提出系统性的预防措施,为轧辊箱设备维护及维修提供技术保障. 相似文献