分析了镦粗速度控制环节的动态特性；
The dynamic characteristics of upsetting velocity are also analyzed.
减小长度、增加横截面，称为镦粗金属。
Decrease length, increase cross-section, called upsetting the metal.
主要有裂纹、凹陷和镦粗、表面蚀坑、崩落等。
There are mainly crack, depression, upset, pit on the surface, breakout, etc.
采用光塑法对圆柱体的平板间镦粗进行了定量研究；
Upsetting of a circular cylinder between plates is studied by optical plasticity method.
对水压机锻造平板、漏盘间镦粗圆柱体进行了力学分析。
Mechanics analysis of cylinder upsetting between flat platen and supporting ring was conducted.
介绍了镦粗直螺纹接头的工艺和流程以及工厂化加工过程。
The workmanship and operation flow of the punching straight thread joint is introduced, including the process in a factory.
镦粗凸模尺寸以及下支撑板斜角对镦粗翻边有较大的影响。
The size of upsetting-burring punch and angle of support panel also have great impacts on the upsetting-burring.
实验结果表明，当撞击速度较低时，弹体头部发生镦粗变形；
The results show that, with a relatively low impacting velocity, plastic deformations occur at the noses of the projectiles;
为进一步研究制定镦粗及拔长工艺参数提供了定量的理论依据。
All the results lay a quantitative theoretical foundation for further studying and designing technologic parameters of upsetting and st retching technology.
镦粗变形是大型饼类锻件的主要成形方式，夹杂性缺陷是其主要质量问题。
The upsetting deformation is the main forming mode for heavy disk forgings and the inclusion defects is the main quality issue.
最后，对铝合金厚板的传统圆孔翻边和局部镦粗圆孔翻边工艺进行了验证。
Finally, the traditional burring and upsetting-burring processes for the thick sheet of aluminum alloy were verified.
用广义ubet方法分析了烧结钢圆环光滑平板镦粗变形，并作了实验验证。
The general UBET is applied to analyze deformation of sintered steel ring is smooth plate upsetting, and theoretical calculations are compared to experimental results.
镦粗过程中，圆柱坯料易在侧表面形成鼓形，这一问题长期困扰着实际生产。
In the upsetting process, it is easy to form drum shape on the side surface of the cylindrical billet, which has puzzled the practical manufacturing for a long time.
如果缺少系统的局部镦粗规则的指导，则会造成大量的试模时间和材料的浪费。
In the absence of systematic upsetting instructions, we would waste quite a few materials as well as a great deal of time for model experimenting.
研究开发成功的SQ系列高强度绳索取心钻杆首次采用了薄壁钻杆内镦粗技术。
Inner upsetting technology for thin wall drilling pipes was used in Series SQ high strength wire line drilling pipes.
对圆柱形工件在弹性工具中镦粗和闭合模镦粗时的回弹和二次屈服进行了分析。
The spring back and secondary yielding of cylindrical billets in elastic tools during upsetting and closed-die upsetting are analyzed.
分析了粉末烧结材料镦粗和复压工艺的致密效果，提出了闭式模锻工艺设计原则。
The densification effects of upsetting and repressing are compared, and a technology design principle for closed die forging is suggested .
用塑性泥模拟了圆柱体的镦粗和压扭工艺，观察了工件内部孔洞性缺陷的演变过程。
Both upsetting and processes are simulated by using plasticine as model material, the evolution process of the cavities in the cylinder is observed.
以圆柱坯热镦粗和方条料热拔长问题为例，论述了该方法在刚塑性变形分析中的应用。
It was discussed in the paper that the method applied to the analysis of rigidly plastic deformation through examples of upsetting a cylindrical billet and drawing a square...
结果表明：与一般镦粗成形相比，扭压成形具有可促使变形均匀、增加变形量等优点。
The results show that compared with upsetting, twist-compression forming can increase the plastic deformation, make deformation uniform, and improve the quality of forgings.
将该技术应用于矩形块体镦粗过程的有限元模拟中，较好地解决了六面体网格重划问题。
When using this technique in the finite element simulation of rectangular solid upsetting, the hexahedron remeshing problems are solved well.
在镦粗变形中金属的流动行为不仅影响变形抗力的大小，而且会影响变形工艺设计的准确性。
The flow behavior of metal during the upsetting will affect not only its resistance to deformation but also its accuracy of designed deformation process.
与伸长相反的是镦粗，即产生压缩性缩短。例如，棒料的直径可以通过加热和轴向锤击而增大。
The opposite of elongation is upsetting, which produces compressive shortening. For example, the diameter of a bar can be increased by heating and hammering axially.
该数值模拟结果对圆环镦粗时各种因素之间确定了量化的关系，对环形件镦粗提供了科学依据。
This results of numerical simulation establish the quantity connection of these factors, and provide foundation for ring upsetting.
研究了用液压机、曲柄压力机、空气锤及高速锤的打击速度对粉末冶金烧结体进行的镦粗试验。
The upsetting test of metal powder sintered preform by blow speed of the hydraulic press, crank press, pneumatic hammer and high energy rate forging hammer was reported.
在电热镦粗过程中，采用神经网络和虚拟仪器相结合的方式，创建了加热电流预报的虚拟仪器。
Taking the course of the electric upsetting as an example, combining Neural Network with virtual instrument, we has put forward a virtual instrument about prediction of heating current.
结果表明：烧结体的镦粗变形规律与致密体相同。指出了曲柄压力机是粉末锻造工艺的最佳设备。
The results show that the upsetting deformation law of sintered preform is alike with the compact body, and the crank press is the best equipment of powder forging technology.
介绍了汽车变速箱中的一个关键零部件—双联主动齿轮的冷态镦粗、挤压及冲孔的复合成型工艺。
This paper introduces cold heading and combined forming process of extrusion and punching for gear cluster, a key part of automotive gearbox.
结果表明，硬度实验类似于压缩实验中的镦粗，硬度计压头可使金属基体发生塑性变形及粘性流动。
It demonstrated that the experiment of hardness is likely to upset in the experiment of compression. Hardness tester indenter make matrix metal plastic deformation and viscous flow happen.
在对镦粗速度、加热电流、镦粗压力等主要工艺参数分析的基础上，建立了工艺过程的优化控制系统。
Based on analysis of main process parameters such as upsetting velocities, heating current, upsetting pressures etc., the optimum control system of process parameters is determined.
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