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1)  hot ring rolling
热辗扩
1.
A 3D rigid-plastic and coupled thermo-mechanical FEM model for hot ring rolling has been established based on software DEFORM3D, and further the distribution features and the influence law of temperature and strain field on the hot ring rolling process have been simulated and analyzed.
基于DEFORM3D平台,建立了环件辗扩三维刚-塑性热力耦合有限元模型,模拟分析了热辗扩过程中温度场和应变场的分布特征及其对成形的影响规律。
2.
In order to achieve its optimum design and precise control of shape and performance, research on coupled thermo-mechanical effects and microstructure evolution has thus become an important subject urgent to be resolved in the leading field of the hot ring rolling process.
金属环件热辗扩是一个多因素耦合作用下的宏观变形和微观组织演变交互影响的复杂成形过程。
2)  Ring rolling
辗扩
1.
Plastic deformation in ring rollling with open groove is analysed in use of upper bound method, the expressions of roll force and torque in ring rolling are derived, and the relations of the roll force and torque to feed velocity in ring rolling are explained.
用上限法分析了环件开式辗扩变形,导出了辗扩力和力矩计算公式,阐述了辗扩力和力矩与辗扩进给速度的关系。
3)  cold rolling
冷辗扩
1.
Abaqus is used to build 3-dimention rolling model,and the Abaqus/Explicit finite element method is used to analyze the cold rolling of step outer ring,mechanism of rolling deformation defects of step outer,the metal flow characteristic during rolling process.
基于阶梯形环件轧制理论,初步设计模具、毛坯和工艺参数,应用Abaqus软件建立轧制的三维模型,并利用Abaqus/Exp lic it显式算法对阶梯形环件轴承外圈的冷辗扩成形进行模拟分析,揭示出梯形环件轧制缺陷的成形机理和轧制过程中金属流动的特性。
2.
Taking cold rolling rings of 6304 bearings as examples,drawing-up of the cold rolling technology for rings of the deep groove ball bearings and design method of cold rolling dies are introduced.
以 6 30 4轴承套圈冷辗扩为例 ,介绍深沟球轴承套圈的冷辗扩工艺编制及其冷辗模具的设计方法。
3.
The cold rolling technology of bearing is a kind of cold forming technology by utilizing plastic deformation of metal.
在设备能力范围内,分析了冷辗扩加工的综合辗压区,综合考虑了辗压时的力能参 数与环坯变形状态,建立了轴承座圈冷辗扩加工工艺参数分析的数学模型。
4)  Ring rolling
环件辗扩
1.
Calculation of sliding neutral angle in deformation zone of ring rolling
环件辗扩中变形区滑动中性角的计算
5)  cold ring rolling
冷辗扩
1.
Combined hourglass control in analysis of cold ring rolling process;
环件冷辗扩分析中组合沙漏控制
2.
Recent status and development of real-time measurement and online control technology in cold ring rolling;
冷辗扩过程实时测控技术的发展状况
3.
The research of section transformation rule for groove ball ring in cold ring rolling
沟球环件冷辗扩过程中截面变化规律
6)  ring rolling
辗扩成形
1.
Kinematical analysis in ring rolling;
辗扩成形系统的运动分析
补充资料:锻压:辗扩
       环形毛坯在辗压辊和芯辊构成的孔型中逐步扩大直径并成形﹐製成所需环形件的旋转锻造方法﹐又称扩孔或辗环。辗扩以热锻环形件为坯料﹐用以製造轴承环﹑轮箍﹑高压容器﹑缸体和衬套等较大直径的环形件﹐可达到的精度﹕外径小於500毫米的工件直径公差可在 1~2毫米之内﹔外径为1~2米的工件直径公差可在4~5毫米之内。
         图 辗扩原理图 为辗扩的原理。主动旋转的辗压辊逐步压下﹐使置於芯辊上的环形毛坯直径相应扩大﹐毛坯的截面形状尺寸也随之改变﹐直至达到產品的要求。辗压机在芯辊的两侧设有导向辊和控制辊。导向辊在辗压过程中起扶持毛坯的稳定作用。控制辊在工件辗扩到预定的直径时发出信号﹐起控制尺寸的作用。辗扩成形有变形力小﹐设备轻﹐生產过程平稳和便於自动化等特点。辗扩工艺设计主要是根据坯料和產品的形状和尺寸﹐确定合理的辗扩係数 ﹐即辗扩前后环形件的直径比﹐一般取=1.3~1.7﹐形状复杂的工件取小值。
         辗扩机分为倾斜式﹑卧式和多工位型 3种型式。多工位辗扩机一般设有旋转工作台﹐其上设有上料﹑辗扩和下料等工位﹐能自动完成辗扩操作。倾斜式和多工位辗扩机一般用於生產中小形的环形件。在卧式辗扩机上工件平放在辗扩工作台上进行辗扩﹐用於生產车轮轮轂﹑大齿圈﹑容器壳体和直径达数米的环形件。
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