成形模

Based on the method of numerical simulation, the diameter of steel billet, entrance half angle of concave die and the dimension of spline were analyzed for the forming force on the spline processing with the help of a rigid-plasticity finite element software Deform 3D.

借助刚塑性有限元软件Deform-3D，采用数值模拟的方法分析了矩形花键轴冷挤压过程中，坯料直径、凹模入模半角及键齿尺寸对花键成形力的影响。

In the hydraulic counter pressure drawing,with a blank being pushed to a punch surface formed by higher fluid pressure,a good die fittingness of shells and a high accuracy of its inner diameter can be obtained.

充液拉深成形中，由于高压液体紧紧将毛坯贴向凸模表面，因而零件具有良好的贴模性并能获得很高的内径精度。

The influencing factor analysis shows that the formability window obviously expands with the decreasing of the drawing ratio and the increasing of the normal anisotropical coefficient r -value and the die profile radius, but the effect of the hardening exponent n -value on formability window is not obvious.

而影响因素分析显示：随着拉深比降低、厚向异性系数增加和凹模圆角半径增大，成形窗口明显扩大； n 值增加，成形窗口虽然有所扩大，但是效果并不明显。

Patternless Casting Manufacturingtechnology is one kind of Rapid Prototyping technology with independent intellectual property rights of our country and it has been widely applied in many fields.

清华大学机械工程系激光快速成形中心，北京 100084摘要：无模铸型制造技术是一种具有我国自主知识产权的应用广泛的快速成形技术。

In the research of molding performance of MIM feedstock, for the shortcoming of capillary rheometry, it was propounded that using spiral mold test molding performance of feedstock, and a set of spiral mold was creatively designed with quickly exchange gates and closed mold cavity.

不锈钢模芯零件充模仿真分析表明，由于熔体流动的&跑道效应&，采用单浇口注射成形两侧流动严重不平衡，端面四个波峰和波谷明显，中部芯柱出现欠注，并发现该零件中间芯轴处成形最困难。

The research indicated that high precision micro-gear can be batch achieved by silicone mould vacuum casting and the vacuum deaerating time had the most important influence on the physical dimension of micro-gear.

研究结果表明，利用硅胶模进行微齿轮真空铸型可批量获得精度较高的成形件，真空脱泡时间对微齿轮成形件的外形尺寸影响最大。

Several processing plans for an automobile dust cap were put forward after a discussion on the component structure and dimensional tolerance.

通过对汽车防尘盖的结构和尺寸公差的分析，提出了几种加工工艺方案，对各方案进行了论证，最终确定了采用单工序模成形该零件，在1个工位同时完成成形和切断2个工序。

The basic principle is to use a series of rules with a high degree of adjustable basic body Based on the basic body of the real-time control, to construct the required shape forming face, replace the traditional mold of the plate to achieve rapid 3D-Forming.

其基本原理是利用一系列规则排列、高度可调的基本体，通过对各基本体的实时控制，构造出所需形状的成形面，取代传统的模具来实现板材的三维曲面快速无模成形。

3D FEM has been employed to analyze and simulate numerically the process of hot extrusion of transmission shaft forgings with deep research of phenomena of top and bottom of fork that not completely filled in the forming process hence all especial punch die structure preventing the defects been developed.

新闻摘要：采用三维有限元法对套管叉锻件热挤压成形过程进行了数值模拟仿真分析。针对其成形过程中出现的叉部顶端及底端充不满现象进行了深入分析，提出了防止缺陷产生的一种特殊的凸模结构。

The simulation results show that the asymmetry structure of the ratchet die cavity influences the BMG's flowing behavior greatly. During the material filling tooth cavity, dead zone volumes exist and situate on the areas with sparse teeth distribution. The full filling or not of the ratchet tooth tips, as the final filling region of the forming process, determines the super-plastic forming quality. Adopting smaller punch speed or longer load holding time is necessary for full filling of the tooth tips.

研究结果表明，棘轮模腔结构的不对称性对材料的流动行为影响显著；在材料向齿形的充填过程中存在流动死区，死区的位置处于齿形分布较稀疏的部位；齿形尖角是成形的最后充填部位，在终成形阶段采用较小的压下速度或较长的保压时间，有利于齿形尖角的完全充满。

Singer Leona Lewis and former Led Zeppelin guitarist Jimmy Page emerged as the bus transformed into a grass-covered carnival float, and the pair combined for a rendition of "Whole Lotta Love".

歌手leona刘易斯和前率领的飞艇的吉他手吉米页出现巴士转化为基层所涵盖的嘉年华花车，和一双合并为一移交&整个lotta爱&。

This is Kate, and that's Erin.

这是凯特，那个是爱朗。