Ф108mm六辊矫直机入口导卫及出口导辊改进

针对Ф108 mm六辊矫直机入口导卫局部磨损严重,出管辊道磨出很深的凹槽,划伤钢管,影响产品表面质量的现象进行分析,对入口导卫装置进行改进,出管辊道增加了导辊装置,从而稳定产品表面质量,提高了生产效率。     

大规格角钢滚动导卫设计与应用

介绍了唐钢大型钢生产线大规格角钢成品导卫由滑动导卫改为滚动导卫的设计应用及改进过程,成品入口成功应用滚动导卫装置,解决了由于成品入口导板刮钢造成的刮伤缺陷问题,成品质量稳定性大为提高,避免了导卫的频繁打磨和更换,降低了工人劳动强度,提高了生产效率。     

热轧履带钢精轧机导卫设计与改进

针对目前莱钢生产的履带钢腿端划伤问题,研究现有精轧机导卫装置,通过改进入口和出口导卫装置,解决了履带钢腿端划伤问题,提高产品表面质量,提高生产效率。     

专利信息

一种立-平可逆粗轧机组导卫装置 专利号：ZL200720067790．0 专利权人：上海梅山钢铁股份有限公司 发明（设计）人：陈应耀 杜家明 贺应广 本实用新型涉及一种轧钢钢板输送导向装置,特别涉及一种立-平可逆粗轧机组导卫装置。主要解决带钢发生跑偏时极易造成机架内废钢的技术问题。本实用新型的技术方案为：一种立-平可逆粗轧机组导卫装置,包括一对圆弧形导卫板,分别与水平轧机牌坊入口本体、立辊轧机牌坊出口本体以及立辊轧机引出辊道辊轴承座本体焊接在一起,水平筋板和竖直筋板加焊在圆弧形导卫板与水平轧机牌坊入口本体、立辊轧机牌坊出口本体以及立辊轧机引出辊道辊轴承座本体之间,从而对导卫板进行加固。     

摩根夹送辊入口导卫系统改进和应用

通过对入口导卫系统在导卫形式、对中方式上的改进,使装配简化,应用后大幅缩短了导卫更换时间、提升了入口导卫系统在线寿命,降低了备件消耗.     

不均匀大宽展轧制技术及应用

分析了不均匀大宽展的一些内在机理，设计出一套运用不均匀大宽展理论生产更宽窄带钢的孔型。并通过改进轧辊材质、调整冷却系统等措施，使轧辊达到很好的冷却效果，有效地减少了其磨损。针对不均匀大宽展轧制对入口导卫的特殊要求，通过采用复合导卫解决了轧件轧制过程中的稳定性问题、导卫的红热性问题和导卫的高温耐磨性问题。     

精轧机入口导卫高度检测装置的改进

研究了热轧精轧入口导卫高度检测装置的角度编码器、磁尺两种检测装置的检测精度及其优缺点,并通过实验对磁尺的铰接式与垂直式的两种方案进行比较,得出垂直式磁尺检测装置是导卫高度控制的最佳选择。本方案消除了数据传输滞后、检测精度低劣、以及铰接方案的双映射等缺陷,使导卫高度控制的精度达到0.1 mm,异常带卷长度也由120 m,同步下降到0.3 m,从而达到了改进的预期目标。     

精轧机导卫装置的改进设计与应用

由于导卫装置采用传统连接方式与轧机紧固一体,因传动链长、固定支点多,在生产中经常出现松动、卡死等现象,诱发轧制事故.为此,采用以进口导卫中线为基准、用孔型找正、实现轧制线统一的改进思路,设计了与轧机本体分离的固定导卫装置.应用表明,改进的导卫装置承受约180万次的冲击无变形,且调整灵活,换槽时间仅为3min.     

角钢滚动导卫在安钢φ400mm型材机组上的应用

型钢生产因轧件断面复杂,多使用滑动导卫装置,滚动导卫使用有较大难度.为提高产品表面质量,安钢φ400mm型材机组在∠80 mm～/100 mm角钢成品入口成功应用滚动导卫装置,成品质量稳定性大为提高,解决了大规格角钢易产生刮痕缺陷的难题,万吨钢检验废由原来的50 t降到20t,起到了较好的质量改进效果.     

棒材进口滚动导卫的改进

针对张钢棒材生产线滚动导卫装置存在的结构复杂、装配困难、不易调整和更换等问题,通过改进滚动导卫的装配结构、固定方式、支撑臂厚度等,使导卫结构简单、紧凑,装配时间由每套40～50min缩短到10min,在线更换时间由30min以上缩短到10min左右,调整、维修便捷,运行稳定性与可靠性得到保证。     

导卫系统的优化设计与改造

济钢中型轧钢厂由开坯转为型钢生产后 ,针对导卫系统存在的问题 ,对翻钢板进行技术改造 ,对导卫适用性、共用性及导卫进口装置的工艺参数和稳定性进行优化设计 ,使导卫装置满足了生产要求 ,平均换辊时间减少到 2 .85 h,轧机机时产量和日历作业率分别提高到 47t和 61%。     

鞍钢线材厂精轧机组导卫系统优化设计

采用新研制的鞍钢线材厂高线精轧机组导卫装置，提高了线材尺寸精度和成材率，调整方便、定位准确，并增加了机间水冷功能，延长了导板使用寿命。     

无孔型轧制导卫设计

山东莱芜钢铁集团公司棒材厂在开发无槽轧制工艺过程中,设计应用了可调组合式滑动进口导卫装置,并对滚动进口导卫进行了修复改进,保证了无槽轧制工艺的顺利实施及轧制过程稳定。可调组合式滑动进口导卫装置,导卫内腔尺寸及安装尺寸可调,适应性、共用性强,具有推广应用价值。     

H型钢轧辊共用优化与实践

通过对小型生产线轧辊使用情况的分析，利用现有的轧辊系统，开发了用一套轧辊生产多个规格H型钢或只需更换3架万能轧机的轧辊就可生产尺寸相近H型钢或工字钢的轧辊共用技术，轧辊占用率降低30％，导卫件降低15．3％，吨钢成本降低18．7元。     

高速线材轧机无孔型轧制技术的开发与应用

介绍新钢线棒材厂高速线材生产线粗轧前八架轧机开发无孔型轧制的情况,重点介绍其工艺参数的确定、导卫装置的改造等方面的内容。实践表明,无孔型轧制在提高生产率和轧辊利用率、改善产品表面质量等方面效果显著。     

无槽轧制时轧件稳定性研究

对无槽轧制时的轧件稳定性进行了实验研究，在考虑入口处导板扶持轧件的情况下，研究了轧件稳定性随轧高宽比，轧件脱矩程度的鼓形率，压下率，相对导板间隙等参数变化的规律。     

Evaluation of Laminated Circular Elastomeric Bearings

This paper evaluates the behavior and performance of laminated circular elastomeric bearings and compares them to those of square and rectangular bearings. The study included an experimental evaluation and a nationwide survey of state Department of Transportations on the use and performance of circular bearings and bearings in general in their states. The experimental investigation studied the bearings' behavior in compression, compression and rotation, and compression and shear. Results from this limited study showed that the three bearings have similar stress-strain behavior in compression and they are in agreement with the AASHTO LRFD guide stress–strain curves. In compression and rotation, the AASHTO LRFD substructure moments are slightly less than the measured values for circular bearings and rectangular bearings rotated about their strong axis for a compressive stress of 10.3?MPa (1.5?ksi) and slightly higher than those of rectangular bearings rotated about their weak axis. In compression and shear, the shear stiffness of circular and square bearings is in agreement with theoretical values within the range of design displacements. Results from the survey showed that many states are using circular bearings and more states would consider using them, however no maintenance or monitoring data were available on their short-term and long-term performance.     

Pitot-Static Tube System to Measure Discharges from Wells

Pumps are widely used to lift water into canals, and usually spill directly into the canal. Upstream pipe fittings frequently produce a distorted flow profile that is detrimental to the proper installation and operation of common pipe meters. Thus, meter calibration may be necessary when the pipe length upstream of the meter is less than recommended. Meter calibrations under field conditions can be difficult and expensive. A simple pitot tube system that can be clamped to the outlet of the pump discharge pipe was built and tested for measuring and calibrating pump discharges under field conditions. It is used to detect the velocity at several points across the pipe diameter; distorted profiles can be measured. Using this information, the meter technician can determine whether a correction in the meter coefficient will suffice and if flow conditioning equipment is working effectively. The system can be constructed using common shop techniques and standard small pipe fittings. Most previous pitot systems required special ports in the pipe or used special concentric tube constructions that are difficult to build.     

Tribological and mechanical properties of PM journal bearings

Abstract

Powder materials are widely used in journal bearings since they provide a good tribological performance with journal bearings. These bearings are self-lubricated and can be used in places where no lubricating is possible. In this study, tribological and mechanical properties of copper based CuSn10, ferrous based Fe–graphite and copper+ferrous based CuSnFe–graphite bearings manufactured by powder metallurgy method have been determined and compared. Wear tests were carried out at 20 N load and 1500 rev min^?1 every 30 min for 2·5 h using radial journal bearing wear test rig. Hardness, tensile, compressive, bending and radial fracture mechanical tests of these bearing materials were carried out. As a result, tribological and mechanical properties improved in CuSnFe–C bearings.