查询词典 rolling-over

On the basis of nonlinear FEA code ANSYS/LS-DYNA, rail rolling process of universal rolling unit were simulated by 3D large deformation thermal-mechanical coupled elastic-plastic FEM. And the deformation shape of the work piece, deformation parameters and cross dimensions for each pass were obtained and stress,stain distribution and metal flow in rolling process of typical passes were analyzed in detail. Analyzed typical pass stress and strain distribute, rolling stress and deforming in universal pass last groove in detail,discussed the effect regularity of residual stress distribution and size to safely using rail, detailed to expound universal pass to railhead tread circular arc process.

本文基于ANSYS/LS-DYNA非线性显式有限元软件，以60kg/m的重轨为研究对象，采用全三维弹塑性热力耦合的有限元方法研究了重轨在万能轧机组中的变形过程，得到了轧件在孔型中的延伸情况、各道次轧件的变形参数，分析了典型道次的应力、应变分布，并详细分析了全万能成品孔型中轧件受力和变形情况，讨论了残余应力的分布及大小对钢轨安全使用的影响规律，详细地阐述了全万能成品孔型对轨头踏面圆弧的加工过程。

One object for another object's surface without sliding or rolling the rolling of the trend, as the two objects in contact with some compression in the deformation of the rolling and obstruction, called "rolling friction."

一个对象的另一种物体的表面无滑动或滚动滚动的趋势，因为两个物体接触一些压缩，在变形的滚动和阻碍，所谓的"滚动摩擦"。

Rom forging to rolling, from sheet metal to titanium Simufact.forming has been developed to support in all forming applications, independent from process temperature, machine used or material processed: closed die forging or extrusion, drawing, upsetting, bending or free forging, flat rolling, profile rolling or tumbling cold, hot or semi-hot, mechanical press, hammer or screw press, rolling machine or orbital forging even coupled processes and spring-controlled tools, simple low-alloyed or stainless steel , aluminium or non-ferrous metal, titanium or nickel based alloys, massive or sheets, material flow or dieload analysis Simufact.forming is the integrated simulation environment for the optimization of all forming processes.

orming已经成功研制可支持目前所有制造业的软件应用程序，并可独立的仿真金属温度，机体使用情况或材料的处理：封闭模锻或挤压，钢绘，镦，弯曲或自由锻造，轧制，型材辊压或翻滚-冷，热或半热，机械压力机，锤或螺旋压力机，辗机或轨道锻造-更可加上流程以及spring-controlled工具，简单的低合金或不锈钢，铝或非铁金属，钛镍合金，大规模工程或床单工程，物质流或dieload分析。

Jolly, jolly sixpence I\'\'ve got sixpence to last me all my life I\'\'ve got tuppence to spare Many tuppence to lend And tuppence to send home to my friend No cares have I to grieve me No handsome little boys to deceive me I\'\'m as happy as a queen, believe me as I go rolling home Rolling home, rolling home By the light of the silvery moon I\'\'m as happy as a queen, believe me as I go rolling home.

我有六便士去享受，我有两便士的多余，还可以借给别人还有两便士送给家乡的朋友。没有悲伤，不受欺骗。我象女王一样快乐。当我衣锦还乡时，请相信我。在银色的月光下，我像个快乐的女王。

The objectives of this paper were to investigate the simulation and design of continuous multiple-station rolling forming process for a U-Section Steel Bar by CAE software-DEFORMTM Due to the limitation of elements number using a short strip 120mm went through all the stations to simulate the real continuous rolling forming on factory The roller gap was fixed as 0 30mm roll speed was 20 rad/sec and progressive angles were all equal for each rolling process which were the formed angle divided by by the number of station Three rolling processes were selected with 6 9 and 12 stations respectively During simulation processes two cases occurred Case A the strip was through a single station Case B the strip across two stations Because the strip laterals side was stretched and twisted during the process The model of case B closer to the practical process than case A and the calculated stress and strain on the tip of U section for case A were lower than these for case B by up to 15% From the result of case B for each process the stress for 12-station process was smallest 9-station process second and 6-station process next Because less-station can save larger cost and forming time but the bigger stress and strain for 6-station caused wrinkles on lateral sides not found on 9-station and 12-station Therefore 9-station process was a more suitable design than 12-station process smaller stretched and twisted and stress The progressive angles for 12-station was 7 5?

本文主要是以DEFORMTM有限元素软体模拟U型钢片连续道次成型与单一道次成型以确认单一道次模拟的是否可取代连续道次模拟之研究。因DEFORMTM 软体对於网格元素上的限制故使用较短素材120mm通过所有的成型站以模拟工厂实际连续成形方法。辊轮间隙固定为0 3mm；辊轮转速为20 rad/sec；弯曲角度的方法为将成型角度平均除以成型站数。有三种辊轮成型方式被选择分别为6站，9站，与12站。在模拟的过程中有两种现象会产生 Case A，素材通过单一成型站。Case B，素材会通过两个成型站。因为在模拟过程中素材的两端会有拉应力与扭力。Case B的模拟比Case A像实际的制程，并计算应力与应变在U型断面的Tip部中可发现Case A比Case B低约15%。从Case B的每站的结果可以得知，12站的成型应力最小，9站次之，6站最后。

In order to increase the rolling capability of three-high cogging mill,the forging plant of Laigang reforms the traditional cogging process,joining the six angle-square pass with box pass well and designing the six angle pass with heavy elongation to realize conjugate rolling,thus realizing the heavy reduction,heavy elongation for cogging rolling and single end product outing and self nip,improving the rolling rhythm.

为提高三辊开坯轧机的轧制能力，莱钢锻压厂对传统的开坯工艺进行改造，将六角—方孔型与箱形孔良好衔接，并设计了能够共轭轧制的大延伸六角孔，从而实现了开坯轧制大压下、大延伸，以及成品单出与自动咬入，提高了轧制节奏。

Based on copper plastic processing features, the metal rolling theory and the practical procedure, the paper presents the design method of the copper bar rolling mill pass system and the calculation methods of the factors. Some key factors, such as the elongation factor and filling metal degree through the pass system at every rolling segment, and some dynamic factors are calculated for small and middle copper bar rolling mills.

根据铜加工塑性加工特性及金属连轧理论，结合生产过程，文章提出了中小直径铜杆连轧机整个孔型系统设计方法和参数计算方法，计算了各轧制道次延伸系数、各道次孔型金属充满度等关键参数，并对连轧机中的动态参数进行了计算。

The new style rolling mill has no need of replacement gear wheel group then , physical design cuts down , consumptive material is the machinery that such has improved greatly to controllable nature (3) rolling mill rolling copper coin accuracy short, on old-fashioned rolling mill basis slightly easy to change , to handle conveniently, be that laboratory scientific research has lightened burden , has economized cost under the control of.

新式轧机则不需更换齿轮组，这样大大提高了对轧制铜板精度的可控性（3）本轧机的机械结构设计精简，耗材少，在老式轧机基础上略作改动，方便操作，便于控制，为实验室科研工作减轻了负担，节省了成本。

The YWD series oil-cooled motor-driven Rolling Drums equipped are newest drivers for belt conveyers, which reducing speed mechanism are equipped into the drum and driving motors are equipped out of the drum. So they are also called as reducing speed rolling drum or outboard motor rolling drum. The rolling drums have many advantages such as compact construction, light weight, small size, reliable performance, convenience of installation and maintenance, etc. It can be used as driving force for fixed belt conveyers of type of TD75 and DTⅡ, which transport all kinds of loose and lumpy materials, or other cargo.

YWD型油冷外装式电动滚筒是带式输送机的最新驱动装置，它是将减速机构装入滚筒它是将减速机构装入滚筒体内，亦称减速滚筒，减速滚筒再与电机外联构成驱动装置一外装式电动滚，具有结构紧凑、重量轻、体积小、性能可靠、安装及维护方便等优点，广泛应用于TD75、DTⅡ固定式带式输送机作为动力，运送各种散状、块状特料和其他货物。

The experiment and the research indicate that:(1) Through the Hot-Continuous-Rolling production technics under small reduction ratio of 4.04 and 5.08, the rectangular continuous-casting billet of 235×265mm can be used to produce big size steel stick of Φ140mm and Φ 125mm whose macrostructure and mechanical properties meet the standards, this technics is viable;(2) This rolling technics can make the deformation penetrate to the center of the billet by low temperture and low velocity and big roller diameter and large reduction quantity at every pass and optimum design and arrangement of rollers, which is the key of Hot-Continuous-Rolling technics under small reduction ratio;(3) The sending technics used in Xining Special Steel Co.,Ltd can not use waste-heat of billet adequately, but the sensitive temperature section of A1N or sulphides or inclusions separating out is avoided, creating a favorablecondition for insuring good surface quality of final rolled steel;(4) The Hot-Continuous-Rolling technics under small reduction ratio has a close relationship with the billet quality control and the hot sending process control and the cooling control after rolling.

通过实验研究表明：(1) 235×265mm矩形连铸坯分别采用4.04和5.08的小压缩比热连轧生产工艺，所生产的Φ140mm和Φ125mm的大规格棒材，其低倍组织和机械性能均符合标准要求，该工艺是可行的；(2)本实验所采取的低温低速、大辊径大道次压下量轧制工艺加上轧辊孔型的优化设计与配置，可以使加工变形渗透到铸坯的中心，这一点是实现小压缩比热连轧生产工艺的关键；(3)西宁特钢在红送过程中虽然铸坯余热未能得到充分的利用，但是有效地避开了A1N、硫化物的析出及夹杂物偏析的敏感温度区，为保证最终轧材良好的表面质量创造了有利的条件；(4)小压缩比热连轧生产与铸坯质量控制，热送过程控制以及轧后冷却控制密不可分。

For a big chunk of credit-card losses; the number of filings (and thus charge-off rates) would be rising again, whether

年美国个人破产法的一个改动使得破产登记急速下降，而后引起了信用卡大规模的亏损。

Eph. 4:23 And that you be renewed in the spirit of your mind

弗四23 而在你们心思的灵里得以更新