轧制

It makes possible and practicaI the manu-facture of spiral flight and other products with good flexibiiity, high efficiency,and Iow consumptiOn,In this paper,the theoretical study on the processes of cold-rolling with conical rollers.

它利用楔形轧制和异步轧制的若干特点，以构成一个新的轧制过程，提供了高效、低耗和柔性加工钢带和螺旋叶片的可能性和现实性。

Rolling force and moment are the basic technics parameter for Assel rolling mill design,but about it,s technics calculate is very poor currently.one form by dint of approximately calculate, the result unlikelihood .J·kazanecki and domestic scholar according as metal distortion superior limit,gave some formula have some worthiness,but very complexity.the author base on practicality rolling technics, gvie a simpleness calculate means.the result close to measure numerical value,supply some reference value.

轧制力、轧制力矩是设计Assel轧管机最为基本的参数，但是目前关于其工艺计算的理论还很不成熟，只能借助于近似工程计算方法求得，结果往往偏差较大。德国的J·kazanecki和国内的一些学者提出了利用金属塑性变形场的上界法求解上述参数，具有一定的参考价值，但其数学计算相当繁杂。作者从轧制工艺实际出发，遵循塑性力学的基本原理，给出了简便易行的计算方法，具有重要的实际意义。

As to the slow variety of the mill characteristics during the rolling process, adopts self adaption deformation resistance model which accord with the character of temper rolling process, and combined with the neural network model to predict the taupe rolling force.

针对轧制过程中轧件特性发生缓慢变化的特点，采用符合平整轧制过程特点的变形抗力自适应模型，并与神经网络模型结合，预报平整轧制力。

The grooveless rolling technology was tested on two bar rolling lines of Xinjiang Bayi Iron and Steel Group Co.

介绍了为解决轧制多品种产品时有孔型轧制存在的问题，先后在2条棒材生产线进行了无孔型轧制试验，并在第2条棒材生产线上基本实现了全连轧。

The analysis of the application of grooveless rolling technology proves that grooveless rolling can be successfully realized in the big-distance mills.

通过对无孔型轧制的工业试验和技术分析，得出无孔型轧制可在大间距轧机上实现，脱方控制的关键点是导卫控制和宽展控制，翻平宽展能使轧件产生圆弧钝角，避免了应力集中和裂纹，采用无孔型轧制具有可统一坯料、提高轧辊寿命2～4倍、降低能耗6%～7%等优点。

There was an obvious phenomenon of mechanical occlusion on the cold spray coating interface, and the rolled coating had the phenomenon of metallurgical bonding; The structure of cold-sprayed coating is dense. The poriness of the cold-sprayed coating gradually reduce as the coating's thickness increase.

结果 涂层界面形貌的不同反映出两种涂层的结合机理不尽相同，冷喷涂层界面出现明显的机械咬合现象，而轧制涂层以冶金结合为主；冷喷涂层组织致密，孔隙率随着喷涂厚度的增加逐渐降低；冷喷涂层的表面粗糙度高于轧制覆铜板，有必要对其进行一道轧制处理，改善涂层表面平整度。

According to the morphological characteristics of cementite lamellae, the deformed pearlite can be divided into three kinds: irregularly bent lamella (pearlite lamella originally inclined with large angles to the rolling plane and irregularly bent after deformation); coarse lamellae with shear-band (the rhomboidal blocks of weakly deformed lamella bounded by shear band) and fine l...

按 渗碳体形态特点，变形珠光体组织可分为以下3种类型：(1)不规则弯曲片层型，即变形后的渗碳体与轧制面呈大角度偏离且不规则弯曲的珠光体。(2)带有剪切带的粗大片层型，即被渗碳体剪切带分开且变形轻微的珠光体。(3)精细片层型，即与轧制方向平行排列、片间距细小且渗碳体严重变形的珠光体。精细片层区域的比例随着轧制压下率的提高而增大。此外，重度冷轧变形还引起渗碳体严重塑性变形和部分溶解。

The results indicate that the temperature at the surface of roller contacted with bar increases rapidly at the beginning of rolling, and it tends to periodically vary along with the rolling process, and this process will cost about 2 h. The temperature of the roller surface reaches the top point which is about 300 ℃ when the roller is circumrotated to position contacted with bar. New assembled milling rolls have excellent result in milling process.

研究结果表明：与轧件接触的轧辊表面的温度在开始轧制时迅速上升，随着轧制过程的进行，温度趋于呈稳定周期性变化，温度达到稳定的时间大约为2 h；当轧辊旋转到与轧件接触处，温度达到最高，最高温度约为 300 ℃，此时辊套轧辊结构稳定，据此生产的组合式轧辊在轧制过程中性能优越。

According to the researching actualities in ring rolling, this paper researched deeply the basic law of rolling deformation by simulation using ABAQUS software on the base of ring rolling theory and elastic-plastic kinematics explicit FEM. And the residual stress in cold ring rolling was computed by numerical simulation.The mass scaling measures in finite element simulation of ring rolling were researched.

本文针对环件轧制的研究现状，基于环件轧制理论和弹塑性动力显式有限元法，以ABAQUS有限元分析软件为平台，以数值模拟的方式对环件轧制变形的一些基本规律进行更深入的研究，并对环件冷轧时的残余应力进行数值模拟计算。

The ring is rolled by drive roller and mandrel roller, drive roller offer rotation to make ring rotate continuously and mandrel roller offer line feed to make the ring wall become thinner and thinner. The guide roller ensure the ring rolled comfort, and inspect roller check the rings diameter whether reach the limit dimension.

主动辊提供转动，使环件变形区不断循环周而复始的通过轧辊孔型；芯辊提供直线进给运动，使环件壁厚不断减小以实现环件直径扩大的加工过程；导向辊保证轧制平稳进行，检测辊测量轧制环件尺寸是否达到要求以停止轧制。

Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.

在对危险的南部地区访问时，他斥责什叶派民兵领导人对中央集权的挑衅行为。

In fact,I've got him on the satellite mobile right now.

实际上 我们已接通卫星可视电话了