共查询到20条相似文献,搜索用时 125 毫秒
1.
针对目前几台新上喷号机经常出现掉字、喷号模糊等现象,经过研究发现影响喷号机喷字效果的三大因素:喷号机喷头机构的调整、喷号机电压、喷号机气压。喷号机喷头机构的调整主要控制喷号机喷号效果,避免喷头被撞坏及出丝不畅;喷号机电压主要控制喷号机起弧,避免喷号机掉字等故障;喷号机气压主要控制喷字清晰度。 相似文献
2.
3.
武钢第二炼钢厂连铸坯喷号机自动控制系统 总被引:1,自引:0,他引:1
对武钢第二炼钢厂连铸坯喷号机自动化控制景统配置、网络通讯、伺服控制系统进行了阐述;经运行考验证明系统性能提高、稳定可靠。 相似文献
4.
基于水冷球墨铸铁管金属锌丝外喷装置的作用及工作原理,对永通球墨铸铁管有限责任公司离心铸管机喷锌时举升机构所存在的问题进行分析,并提出相应的改进措施。通过对铸铁管金属锌丝外喷举升机构进行技术改进,提高了球墨铸铁管质量和节奏,降低了设备故障率,取得了良好的效果。 相似文献
5.
6.
为了提高连铸钢坯喷号作业的安全性和可靠性,设计将喷号机器人系统与连铸工艺结合,在常规喷号机的基础上增加多项改进措施,进一步提高喷号机应对复杂恶劣环境的能力,同时提出对喷号机器人系统与连铸系统进行联锁设计,完善连铸系统部分设备的控制流程,保证生产顺行和设备安全.实践证明,该系统稳定可靠,适合在同类场合应用和推广. 相似文献
7.
8.
9.
介绍了喷号机控制系统的组成和实现方法.喷号机PLC控制系统是为了满足钢板标识的需求而设计的由可编程控制器控制的喷号机控制系统. 相似文献
10.
11.
AbstractThe diameter of droplets in electric arc wire spraying is critical in determining the microstructure, porosity and oxide content of the resulting sprayed coatings. Droplet diameter controls dynamic and thermal behaviour in the spray, and the splashing and spreading behaviour of droplets at deposition. In electric arc wire spraying, the droplet diameter is determined by a combination of the melting behaviour of the feedstock wires in a direct current arc, combined with primary and secondary atomisation processes under the action of a high velocity atomising gas. The high frequency arc voltage variations during electric arc spraying of Fe-0·8C have been investigated and arc voltage fluctuations related to atomisation events occurring at the wire tips during spraying. A simple analytical model has been proposed which allows the diameter of primary droplets produced by atomisation to be calculated from the wire feedrate and the average time period for material removal, which was obtained from the voltage traces. Primary droplets were then assumed to undergo secondary atomisation according to correlations from the literature, and resulting droplet diameters were compared with diameters measured by experiment. Despite uncertainties in some of the thermophysical data and dynamic conditions during atomisation, predicted droplet diameters were in good agreement with experimental mass mean droplet diameters obtained under a range of atomising gas pressures, arc voltages and wire feedrates. 相似文献
12.
以涂层结合强度为判据,采用Ni-Al丝材和PARXAIR-9935电弧喷涂系统制备镍基涂层,通过正交试验对电弧喷涂NiAl合金工艺进行了优化。利用在线检测系统对焰流的强度、粒子的速度和温度进行检测,通过金相显微镜、扫描电镜、能谱仪等手段对涂层和断口形貌进行分析。结果表明,喷涂电流、喷涂电压、雾化空气压力、喷涂距离对NiAl合金涂层结合强度具有不同程度的影响,确定优化后的工艺参数为喷涂电流150A,喷涂电压27V,雾化空气压力0.6MPa,喷涂距离150mm。在优化工艺参数条件下,电弧喷涂NiAl合金涂层组织呈现出典型的层状结构;并且随着涂层厚度的增加,结合强度呈线性下降,其最大结合强度可达39.8MPa。 相似文献
13.
本文通过分析我厂75t循环流化床锅炉(CFB)受热面防磨喷涂施工过程中的管理和监督工作,阐述了在锅炉受热面超音速电弧喷涂项目施工中,业主方的积极配合及施工过程质量管控对防磨涂层最终质量有着非常重要的影响,提出了加强施工过程中业主方监管与做好施工质量控制的重要性。 相似文献
14.
介绍了钢包中钢液钙处理的起源及钙的加入方法和研制的气体旋流喂丝枪和高致密椭圆截面包芯线。建议包芯线成形机和喂丝机生产企业借鉴焊管成形机进行技术改造,生产椭圆截面包芯线成形机;将圆拄面齿形喂丝轮改造成圆弧槽喂丝轮;钢铁企业喂丝处理时增加活动导丝管升程,以实现钢液内部喂丝钙处理。 相似文献
15.
介绍了喷涂(焊)的原理和技术要求,采用先喷后熔的喷焊方法,把硬质合金或金属合金粉末牢固的喷焊在需要修复的水箱拉丝机卷筒和塔轮上,使磨损件再次利用,降低了生产成本。 相似文献
16.
Coatings are produced by wire arc spraying on a steel surface and the effect of coating thickness on the coating characteristics in terms of microhardness, residual stress and friction coefficient are examined. The wire used during coating is composed of FeCrBMnSi, which comprises nanocrystalline and amorphous phases. The twin wire arc spray system was incorporated to generate different coating thicknesses on steel substrate. The analytical tools including three-dimensional imaging optical and scanning electron microscopes, energy dispersive spectroscopy and X-ray diffraction (XRD) are used to assess the coating characteristics. It is found that the surface texture and surface roughness of the coatings change with coating thickness. Thus, reducing the coating thickness results in slightly increased texture height and surface roughness. Microhardness is almost 15% higher for the thin coating (300?μm) than the thick coating (550?μm). The residual stress developed in the coatings is tensile and it changes with coating thickness, such that it reduces for thick coating. 相似文献
17.
采用大气等离子喷涂方法,在不同喷涂功率和喷涂距离下制备氧化铝涂层,研究了喷涂工艺参数变化对涂层显微结构、气孔率以及介电常数的影响。用SprayWatch 2I热喷涂在线监测系统测量等离子体射流中熔融氧化铝粉末的表面温度和飞行速度;用扫描电镜观察涂层的显微结构;对涂层剖面照片用莱卡QWIN图像软件分析计算了涂层的气孔率;用精密阻抗分析仪测量计算氧化铝涂层的介电常数。结果表明,喷涂功率和喷涂距离的改变可影响氧化铝涂层的气孔率。合适的功率和喷涂距离能使粉末获得良好的熔融和较快的飞行速度,形成致密的涂层。较致密的氧化铝涂层介电常数亦较大。 相似文献
18.
19.
20.
李俊强 《冶金标准化与质量》2014,(2):50-53
通过多年来的实践总结,从拉丝模模芯选用与热装配钢套的精度,拉丝模工作区的几何尺寸设计,拉丝模工作区的加工,拉拔钢丝的质量和润滑方面分析了影响拉丝模使用寿命的因素。通过分析知道要保证拉丝模有很好的使用寿命,就必须要从拉丝模选材、设计、加工等方面综合考虑,从而提高产品质量,降低成本消耗。 相似文献