压下

The solid stainless case and screw-down crown of the Black Tip are rated to 200 meters so you can rest easy underwater, and you'll appreciate the huge numerals on the one-way ratcheting bezel when you need to quickly gauge your bottom time.

固体不锈钢案件和压下冠的黑顶的额定为200米，因此您可以安心地在水下，你会欣赏巨大的数字对单向棘轮面板时，您需要快速判断您的底部时间。

The results show screw-down tilting is the basic reason of the problem. When there is an obliquity between the shaft sleeve and bush which is caused by screw-down tilting, the load capacity of the bearing drops suddenly.

计算结果表明，压下倾斜过大会造成轴套与衬套的轴线出现倾斜，进而导致轴承的静压承载能力急剧下降，是造成轴承寿命缩短、连轧机启动频繁失败的根本原因。

Theoretical analysis of strip mills AGC had been processed and a three-DOF mathematical model of hydraulic screw-down system had been built,which was specified cylinder displacement and inner gap and adapt to varied control way.

对板带轧机自动厚度控制模型进行了理论分析，建立了三自由度轧机负载的液压压下系统的模型，将缸位移和内辊缝相区分，使其适用于不同的控制方式，进而对厚度计式控制模型、变形的厚度计式控制模型、动态设定控制模型进行了对比研究，指出轧机模数和轧件塑性系数分别对应于自动厚度控制系统的静态指标和动态指标，为控制过程中参数的选取提供理论依据。

In the seventh chapter, 3500mm heavy and medium plate mill screw-down drive thread pair dynamic twist micro-dimensional behavior is discussed, and the statically determinate position control method is given out.

第七章论述3500mm中厚板轧机压下传动螺纹副轴线错移和交叉微尺度行为及静定定位控制法。

Modern rolling mill running with heavy-duty and high-speed, due to resolve rolling mill roller bearing longevity shortenning and burning problem,against the traditional thoughts of "random phenomenon" and "offsetting roll system position", the new thoughts of relation between rolling mill 1mm~1um micro-dimensional behavior and load characteristic of rolling mill roller bearing and screw-down drive thread pair, is developed.

现代轧机在重载、高速运行中，对轧机设计理论无法解决的轧机滚动轴承短寿烧损难题，挑战&随机现象&和&偏移距辊系定位&学术成见，开辟了探索轧机辊系1mm～1μm微尺度行为与轧机滚动轴承和压下传动螺纹副承载特性有关的新思路与方法。

This paper introduces a electrical and hydraulic control system in screw down device of plate mill.

介绍了应用在中厚板轧机压下装置上的电气及液压自动化控制系统。

Some solutions are put forward by analyzing reasons of burning loss for the screwdown screw and nut on steckel mill.

通过对炉卷轧机的压下螺丝与螺母烧损的设备事故现象的分析，找出事故产生的原因，并提出了相应的解决方案。

For characteristic of the reversible cold mill hydraulic screw down system ,a method based on Fuzzy-PI is put forward and is simulated with MATLAB.

针对可逆式冷轧机液压压下系统的特点，提出了基于Fuzzy PI复合控制的方法，并进行了计算机仿真，取

The rolling experiments were performed in the rolling mill of laboratory with lead, the roll pass scale is 1:5 according to the actual size of 310 Z shape steel. The effect of rolling design and the reduction to the molding of the 310 Z shape is the topic of the research works. We can conclude that the

本文针对孔型系统，将孔型缩小为实际尺寸的1/5，利用实验轧机轧制铅试样的实验方法，研究了孔型形状参数、道次压下量等因素对310乙字钢成型的影响，为改变孔型系统、提高产品质量提供了解决的方向。

The microsturcture characteristics of M2 cast-strip were studied with such experimental methods as metallographic analysis, SEM, XRD and TEM[0]. The effect of sub-rapid solidification on the size, type and distribution of eutectic carbides in M2 cast-strip was analyzed. The effect of heat treatment temperature and its holding time on the eutectic carbides in M2 cast-strip was explored. The eveolution of metastable phase of M2C eutectic carbide during the heat treatment period and the decomposition dynamics concerned were researched. The M2 cast-strips were rolled into thin strips and the effect of deformation ratio on carbides in M2 cast-strip was examined. Then these thin strips were comparied with those that were produced by conventional technology on carbide, hardness, red-hardness and bend strength. At last the rolled M2 cast-strips were made into saw blades and their cutting performance was experimented on in tools factories and then compared with that of similar products produced by conventional technology.

采用常规金相、扫描电镜、X射线衍射及透射电镜等实验研究了M2高速钢铸带的凝固组织特征，分析了亚快速凝固对铸带中的共晶碳化物的析出类型和尺寸以及分布的影响；探索了后续热处理温度和保温时间对铸带碳化物组织的影响规律，分析了铸带中的亚稳相M2C共晶碳化物在热处理过程中的分解情况以及分解动力学；将铸带热轧成薄带，研究了压下率对铸带碳化物组织的影响，并将热轧薄带与常规工艺生产的相同规格的M2高速钢薄带在碳化物组织、硬度与红硬性以及抗弯性能等方面进行了对比；将热轧薄带加工成机用锯条后在工具厂进行了锯切性能试验，并与常规工艺生产的同类产品进行了使用性能对比。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。