The product quality and further processing are affected by the curvature of seamless steel pipe caused during rolling through the three-roll size reducing mill.

The structure and working principle of three-roll planetary mill are briefly introduced. On the basis of analysing the deformation of the product rod, the calculating formula for rolling force is deduced, thus providing theoretical basis for the design of the mill.

本文简单地介绍了三辊行星斜轧机的结构和工作原理，同时，比较详细地分析了其轧棒的变形，从而推得了轧制力的计算公式，为研制三辊行星斜轧机提供了理论依据。

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The article gives a description to the process parameters, roll and mandrel performance parameters, surface quality and dimensional accuracy of 57mm~ 76mm small-diameter pipes hot-rolled on two-roll tube mill or on three-roll tube mill.

介绍了用二辊或三辊轧机试轧φ57～76mm小直径热轧荒管的工艺参数、轧辊和芯棒的力能参数、荒管的表面质量及几何尺寸精度等。

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Rolling experiments were carried out based on the analysis of rolling force and power in a three-roll planetary mill. The result shows that dimensions, surface quality and tolerances of piPes rolled with the mill can all meet the specified requirements.

在理论分析三辊行星轧制的轧制力和轧制功率的基础上，进行了轧制试验，结果表明，采用三辊行星轧机轧管，无论是尺寸范围，还是表面质量、公差均能达到预期目的。

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The power calculation methods of three-roll planetary mill by using cone rolls are discussed. A series of formulas, including the deformation zone, contact area, rolling force and rolling torque, are presented for practical use.

论述了三辊行星斜轧机利用锥形轧辊轧制时的力能参数计单方法，包括变形区形状、接触线方程、接触弧长和接触面积，以及轧制力、轧制力矩的理论计算和数学模型。

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The microstructure and properties of the pure copper tube during the rolling process of a three-roll planetary mill were studied using optical microscope, Brinell's hardness measurements and laser-thermal rating measurements.

采用金相显微镜、布氏硬度仪以及激光热导仪对三辊行星轧制过程中紫铜管的组织和性能进行研究。

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The introduction covers a briefing about the development of the three-roll pipe mill abroad, the latest situation regarding this kind of mill in the world as well as the pipe rolling process with the mill.

介绍了国外三辊轧管机发展简况、目前世界上三辊轧管机的基本情况和三辊轧管工艺的特点。

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The Power Calculation of Three-Roll planetary Mill

三辊行星斜轧机力能参数计算

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Application of Home-made Ф 177 mm Three-roll Pipe Mill

国产化Φ177mm三辊轧管机组的应用

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The paper describes the O. D. and wall-thickness tolerances and internal/ external surface quality of midium and heavy wall steel pipes produced in Hengyang Steel Pipe Factory by means of φ 108mm three-roll mill complete with a 12-stand slight-stretch reducing mill.

介绍了衡阳钢管厂φ108mm三辊轧管机组配置12架微张力减径机生产中厚壁钢管的外径精度、壁厚精度及内外表面质量情况。

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And No. 2 pusher-type furnaces of Angang Medium Plate Plant discharge wide slabs from incline in the course of revamping three-roll mill. Through adopting corresponding measures to optimize the design, good results are made after the furnace is put into production.

在鞍钢中板厂三辊轧机改造中，1、2推钢式加热炉采用了斜坡下滑端出料方式，并采取了相应措施优化设计，投产后取得了良好的效果。

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As one of the key equipment of large-sized compound fertilizer plant, the technological parameters of three-roll mill and its structure are described, some typical troubles and their countermeasures are presented.

介绍大型复合肥生产装置中的关键设备之一&三辊破碎机的技术参数和结构，运行中常见的典型故障及分析，对处理方法进行了归纳、总结。

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Native plants are coming back, and the fox once again bounds about carefree.

原生植物恢复机，灰狐也再次无忧无虑地在岛上跳跃。

六级真题- 2018年 12月 1卷 短文填空

The fox buried his prey beneath the ground.

狐狸把猎物埋藏在地下。

外研社英语同义词辨析词典

The fox ate his fill of the fish and jumped out of the cart.

狐狸将车上的鱼吃了个饱后，就下了马车。

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One day, a big tiger was looking for food in a dense upon the fox and caught it.

一天，在一片茂密的森林里，有一只大老虎正在寻找食物。一只狐狸正好从老虎身边窜过。于是，老虎猛扑过去，就把狐狸逮住了。

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At this time, the fox suddenly hit upon a bright idea to get itself out of the predicament. It boosted its courage and said to the tiger: "Do you dare to eat me?"

这时候，狐狸眼珠子骨碌一转，急中生智，壮着胆子，对老虎说：“你敢吃我？”

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At that time, the fox was also out for food.

这时候，狐狸也出来寻找食物。

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The fox was caught in the trap.

狐狸在陷阱里被套住。

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Look. You see? That's the fox.

你来看这就是那只狐狸

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The fox was on his way back to the forest.

这只狐狸正要返回森林。

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