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炼钢厂转炉托圈裂纹产生原因分析及改造措施 总被引:4,自引:0,他引:4
本文通过对不同钢厂同类设备使用及运行情况的科学分析比较,确定了包钢炼钢厂转炉托圈出现裂纹的原因,并采用技术可靠、施工简单、投资不大的改造措施,消除了由转炉托圈裂纹而带来的事故隐患,从而使整个转炉投入正常的运行。 相似文献
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介绍了一种大型齿圈齿形加工的新方法,并对其加工原理、主要参数的选择计算和切削试验结果进行了分析.指出用该方法加工齿圈对直径没有上限要求,适合无大型齿轮加工设备的企业加工特大型齿圈. 相似文献
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我厂是一个以生产搅拌机为主的建筑机械生产厂,众多型号的搅拌机中,滚筒的传动均采用了齿轮传动结构。在这对传动付中都有一个铸铁的大齿圈。JG250型搅拌机是我厂的老产品,为了保证该机大齿圈的质量,我们一直采用干型、齿面加冷铁圈强制冷却的铸造工艺,由于干型铸造存在效率低、能耗 相似文献
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介绍了用于抗火灾设备液压系统的水-乙二醇液压液在铁、镁、钙离子及酸性条件下润滑性能的变化,提出了把脂肪酸转变为脂肪酸酰胺后再加到液压液中以及在液压液中加入HAPPT助剂的解决方案。该方案可阻止有害变化,并提高了液压液的润滑性能和稳定性。 相似文献
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介绍了一种由AT386为主机,6台AT286和最多可增加到256台MCS-51单片机系统为从机,采用两种通讯介质(20mA电流环和无线电)所组成的分布式微机网络系统,以及该系统的硬件结构设计和软件研制。 相似文献
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中国热处理的过去、现状和未来 总被引:3,自引:1,他引:3
简要回顾了建国以来我国热处理工业生产、工艺及设备研究及专业技术人员的培养等方面从无到有的发展历程。简述了渗碳、真空热处理、激光和电子束热处理、离子热处理等热处理生产技术和设备、工艺材料的发展过程及现状,以及热处理标准化工作的进展。介绍了全国热处理学会、中国热处理行业协会和全国热处理标准化技术委员会等行业和学术团体的组织机构及其组织的一些重大活动。将我国热处理总体发展战略概括成①可持续发展,②产品质量的持续提高,③节约能源,④精确生产,⑤高效率等5个方面;指出我国热处理生产技术改造的方向为①少无污染,②少无畸变,③少无质量分散,④少无浪费,⑤少无氧化,⑥少无脱碳,⑦少无废品,⑧少无人工,我国热处理生产技术改造的途径为①设备更新,②知识和技能的再教育,③不断提高新技术开发能力。 相似文献
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结合工程设计论述了井下无轨设备的特点 ,及其对维修的要求。介绍了全员预防维修的内容 ,对井下无轨设备的维修制度进行了探讨 相似文献
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We discuss the difference in depth resolution between the signal and its phase in photoacoustic imaging applications. We have used a specially fabricated sample to show these effects. Comparison of the two images obtained with the photoacoustic signal and its phase show unambiguously that the depth resolution of the phase is about 1.5 times as great as that of the signal, as predicted theoretically by several authors. 相似文献
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以出水管接头为例,说明了管接头类冲压件在多次拉深过程中的工艺特点,并提出了模具调试过程中拉深颈缩、法兰平面度超差等问题的解决措施。 相似文献
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John R. Helliwell 《Crystallography Reviews》2013,19(3):108-116
In the Centennial celebrations of the birth of X-ray crystal structure analysis, a key feature is to mark the articles which are the first crystal structure analysis studies. This mini review describes the historical development and quotes key statements of W.L. Bragg (WLB) as well as W.H. Bragg (WHB) and the perspectives offered by key players of the time period. The first crystal layout, as stated by WLB, is the face-centred cubic arrangement evident in the Laue Laboratory diffraction photographs recorded from a crystal (of zinc blende) and provided to WHB. The first crystal structure, as stated by WLB, and explicitly remarked upon by P.P. Ewald, as well as WLB's official biographer, D.C. Phillips, is sodium chloride and which was published in June 1913. The use of the X-ray spectrometer of WHB, and the measurements by WHB, at Leeds University, with this device are acknowledged by WLB in his article. This 1913 article also contains numerous raw diffraction data in the form of ‘Laue photographs’ measured by WLB of NaCl, and most importantly of KCl, in Cambridge. WLB seemed to anticipate the use of these two isomorphous and closely related alkali halide crystal structures in his article of 1912. The X-ray spectrometer as the forerunner of all X-ray diffractometer designs is also a remarkable initiative of WHB. 相似文献