成形模具

The aim of computer simulation is to recure the processes of material forming, forcast the compacting defects, choose and change the die structure, the process parameters (motion history of the mutilpunches), and optimize the compact design.

通过计算机仿真技术来实现材料成形过程的再现，从而进行粉末压制过程的缺陷预测，实现模具结构、工艺参数及压坯形状的优化设计。

The moulds and precision functional parts have applied to the machine tool made from the well-known and main manufactures in the world, such as Amada, Strippit, Murata, Trumpf, YangLi, JFY, Yawei and the like. They are widely used the field of sheet metal processing such as metal punching, sheet metal forming, etc..

模具及机床精密功能件等产品能够与世界主流机床配套，如Amada、Strippit、Murata、Trumpf、扬力、金方圆、亚威和捷迈等知名公司，并且广泛应用于金属冲裁、成形等钣金加工领域。

The high-speed multi-stage forging is an advance forming technique. It is different from the traditional die forging process. The improper preform design will lead to some problem in actual production, such as too large load, underfill, folding and so on.

多工位高速锻造是一种节能减耗的先进成形技术，与传统的单工位多工序锻造有较大区别，不合适的预锻工位模具设计在生产中会造成载荷过大、锻件充填质量差、折叠等问题。

In formulates after the formed craft card, starts to carry on the mold the structural design.

在制定出成形工艺卡以后，开始进行模具的结构设计。

In formulates after the formed craft card, starts to carry on the mold the structural design.

在制定出成形工艺卡以后，开始进行模具结构设计。

According to the developing tendency all over the world,the paper introduces the theory of laser forming and the and development in rapid metal tooling,forming,boring,incising,et al,points out the significance and the value of laser in the field of plastic forming .

结合国内外的发展动态，简述了激光加工原理，介绍了激光在快速制模、成形、打孔、切割及模具表面强化等方面的应用现状，并强调指出了激光在塑性加工领域中应用的重大意义和价值。

Gloabl search and local search arithmetic of searching contact point is parented.

根据板料成形过程中模具的运动特点，提出了全局搜索和局部搜索的接触点搜索算法。

Taking "zheng zhou nissan pickup" roof for example,reasonable sequence is technologically arranged,particularly considering the difficulty on its reshaping and blank take out ① stretch forming ② towing ③ riming ④ reshaping.

介绍了汽车上常见的外覆盖件冲压工艺方案的确定过程，并以&郑州尼桑&轻型皮卡&顶盖&为例，针对此件成形难，取件难这一特点，确定了合理的冲压工序为①拉延②修边③翻边④整形，且着重介绍整形模具的设计要点及整形以后顺利取件等措

3D-CTM (Coupled Thermo-Mechanical Forming Simulation) software for precision forging process of aero-engine blade was developed. The key technologies of 3D coupled rigid-viscoplastic thermo-mechanical FEM simulation of blade forging process were studied systematically. By using the remeshing method of contracting from the boundary to the inner, new mesh system from old distorted mesh system can be obtained. A method of modifying the position of nodes touching on the die according to its original normal was proposed to avoid "dead lock" problem due to uncontinuity of normal of scatted die meshes. The pseudo-static iterative algorithm was used to simplify the coupled thermo-mechanical computation. In particular, formulations to determine relaxation factor β was established for rigid viscoplastic FEM adopting penalty function method, and an improved cubic factor rapid algorithm derived from these formulations was proposed by combining with the advantage of advance and retreat search method.

采用基于边界构形的内缩法，实现了三维畸变网格的重新划分；提出了初矢修正法对触模节点的位置进行修正，解决了由于离散的模具网格的法矢不连续造成的&死锁&问题；采用准静态迭代法简化了速度场和温度场耦合计算过程；特别是针对减速因子β的选取，建立了适用于三维复杂成形过程刚粘塑性罚函数法有限元三次因子法的计算公式，并结合进退搜索法提出了改进的三次因子快速算法，提高了模拟计算效率和稳定性，在此基础之上，开发了面向叶片精锻过程的三维刚粘塑性热力耦合有限元模拟分析系统(3D-CTM)，系统的可靠性得到了圆柱体镦粗的验证。

According to the velocity filed mentioned above, the contour of the drawing die was rationally designed. To prove its applicability and superiority, FEM software, MARC and SUPERFORM, were used to simulate the drawing process of cross tube in "conical die" and "streamlined die".

本文以十字形钢管为研究对象，开展对异型钢管拉拔成形过程研究，首先结合挤压流线理论，设计了&流线型&拉拔速度场模型，这为改善金属流动状态、降低能耗创造了良好条件；紧接着以&流线型&速度场为理论依据，对十字形管拉拔模具的凹模轮廓进行了合理设计。

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。