但对成形量小的浅拉延件，传统的圆网格法已不能满足要求。
Nevertheless, traditional circular grid method is no longer applicable for shallow stretching components with small forming capacity.
拉延件回弹常常会造成最终零件的几何偏差，以至于需要对模具进行修改。
Springback often causes the geometric error when die design is based on the part shape required.
最终将优化后的模拟分析结果与实际生产出来的拉延件结果进行对比，验证了数值模拟的有效性，生产出质量较好的产品。
Finally the validation of simulation was approved by comparing the optimization of simulation with the data of experiment, and the high-quality part was produced.
提出了要领设计的新概念，即通过该环节为汽车覆盖拉延件成形的有限元模拟提供初始条件，分析了要领设计的必要性和特点。
A new concept, essential technical design (ETD) for automobile stretching part which provides succeeding FEM simulation with initial conditions, its necessity and characteristics are presented.
覆盖件拉延工艺的设计一般包括以下内容：翻边展开、拉深方向选择、坯料估算、工艺补充面的搭建、压料面的添加以及拉深筋的布置等等。
The design of auto-body forming process commonly includes edge un-wrapping, choice of drawing direction, roughcast reckoning, design of addendum, adding the binder surface and setting the draw bead.
本文介绍了汽车覆盖件模具设计中拉延模与修边模的设计。
This paper introduces the drawing die and the fixing side die of automobiles covering parts.
覆盖件拉延模设计制造周期的长短和质量对新车型的开发周期、汽车产品的质量和竞争力有着直接影响。
The design and manufacturing time and quality of panel dies have direct effect on the development period, quality and competitive capability of new car.
研究了双曲扁壳覆盖件的成形机理及回弹特点，分析了双曲度拉延回弹机理。
This study investigates the mechanism of both forming process and springback of the draw formed panel with double curvature.
控制材料均匀流动，是覆盖件拉延模设计的中心环节，也是影响覆盖件产品开发的重要因素。
The uniform flow of material is the key to the design of panel drawing die, and also the key factor for the development of panel products.
为了实现匀流，在拉延设计中，通常要采取对称化处理，即成双冲压，就是将对称件合在一起拉延。
To enable a uniform flow, a symmetrical layout, or double stamping, is often adopted in the drawing die design, which forms symmetrical parts together.
针对工厂的实际工作方式、工作内容进行系统开发，是开发汽车拉延模标准件库及特征库的指导思想。
Standard part and feature library system development for automobiles 'draw dies should be based on the actual work manners and work contents.
汽车覆盖件拉延工序设计被称为薄板冲压成形领域的设计“黑箱”问题，而拉延模型面设计是其中的核心内容。
The design of drawing process for automobile panel is called as design "black box"in sheet metal forming domain, while the die-face design of drawing die is the key part.
薄壁零件在冲制过程中要求匀速拉延成形。
Pressing thin wall components requires Constant velocity while the operation process.
合理布置拉延筋是汽车覆盖件成形中控制冲压件成形质量的主要手段之一。
Proper layout of draw bead is one of the key ways on controlling forming quality of ram parts in automobile panel formation.
并通过实例的研究表明设计的毛坯是合理的，同时也表明结合等效拉延筋的毛坯设计方法可以用于大型覆盖件的毛坯设计。
The practice approved that the new blank design method is reasonable, and it also showed that this method can be applied to large panel blank design.
作者阐述了面向功能的覆盖件拉延模设计基本原理，提出了功能组件的概念。
The basic principles of function-oriented CAD for panel drawing dies are presented, and the concept of functional group components is brought forward.
运用有限元模拟软件对不锈钢带凸缘半球面形件进行了拉延过程模拟。
The forming process of drawing of stainless steel flanged hemisphere-shaped workpiece is numerically simulated and analyzed by using the FEM simulation software.
介绍了基于型面模板的覆盖件拉延模型面快速设计过程。
The shape surface template based on fast design procedures of mold surface of the drawing die for outer panels is introduced.
首先建立零件的拉延模型，从冲压方向、工艺补充面、压料面、坯料初始形状等方面进行设计分析。
Firstly, the stamping model of the part is built, and the design is focused on drawing direction, shape of addendum and blank-holder surface, initial shape of blank, and so on.
介绍了汽车车身覆盖件的拉延工艺特点和内容，以及在三维CAD环境下汽车覆盖件的拉延工艺设计制造流程。
In this paper, the characteristics and content of drawing technology and its process flow under three-dimension CAD conditions are presented.
介绍了板料成型CAE软件CADEM主要理论，并以汽车外覆盖件翼子板的拉延模具开发为例，阐明了CAE技术在模具开发中所起的重要作用。
The core theory of sheet metal forming simulation software CADEM is introduced. Taking the development of drawing die for front fender as an example, the role of CAE technology is emphasized.
最后，应用该方法对某车型车门内板零件的拉延模具进行静力结构分析，得到了其模具型面变形的主要趋势。
Lastly, a static structural analysis is taken for a vehicle door inner panel part drawing with the method.
研究了双曲扁壳覆盖件的成形机理及回弹特点，分析了双曲度拉延回弹机理。
This study investigates the mechanism of both forming process and springback of the draw formed panel with double curvature. The springback is related with the tension strain of the panel surface.
以某汽车发动机罩拉延模制造为例，阐述了汽车覆盖件模具数字化制造的流程与方法。
With manufacture of the drawing die of an engine hood as the example, the process and method of digitalization manufacture of outer panel dies are indicated.
将优化结果用于指导实际生产，得到了符合质量要求的拉延零件。
Supplying the optimized results to practical production, the eligible drawing parts were gained.
将优化结果用于指导实际生产，得到了符合质量要求的拉延零件。
Supplying the optimized results to practical production, the eligible drawing parts were gained.
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