深拉

A new and applied mathematical model for the equivalent resistance based on force analysis of semi-circle drawbead is established, and a device for testing the resistance is developed.

基于半圆形拉深筋的受力分析，构建了一种新型实用的拉深筋等效约束阻力模型，并开发了一套测试拉深筋阻力的试验装置。

Several affect factors of cylinder part limiting drawing parameter in deep-drawing were summarized in detail. Some new and practically applicable equations for estimating the limiting drawing parameter in the cup-drawing of a cylindrical cup with a flat-nosed punch are derived separately based on the load-maximum principle for localization of the plastic flow.

目前，国内外对极限拉深系数进行的研究较多，文献中详细地总结了板料成形中圆筒件极限拉深系数的若干影响因素，并基于最大承载原则提出了一些计算圆筒件极限拉深系数的实用公式。

By studying the present calculating formula of rectangular drawpiece blank size, this paper gains the major reason of inducting error,and obtains new more accurate formula,according to the same principal that surface area is equal before and after drawing.

对现有盒形拉深件坯料尺寸计算公式进行了分析，得出其误差存在的原因，并根据"坯料面积与拉深件面积相等"的原则得出了较为准确的盒形拉深件坯料尺寸计算新公式。

Abstracts:Based on analysis on the press device of traditional single-action press, the BHF, which is an important parameter, can be regulated realtimely in deep drawing by the use of new hydraulic deep drawing equipment.

在分析单动压力机传统的压边装置的基础上，引入新型液压拉深装置可以实时调节拉深成形中的重要参量—压边力，并可同单动压力机一起替代双动压力机，进一步研究和应用新型液压拉深压边装置，可以为汽车、航空工业中板料加工工艺带来有益的变革。

The results show that the integration of fluid mechanics models and finite eleme nt method is right, the forming limit of alumite LF6 can be raised effectively with hydro-mechanical deep drawing, and the drawing ...

结果表明，充液拉深流体压力作用与板料成形相结合进行数值模拟分析的方法是正确的，采用充液拉深工艺可以有效提高塑性差、难成形材料LF6的成形极限，拉深比可达到 2 。4。

Through calculation, the analytical results agree well with the experimental results. Meanwhile, based on the proposed model, the influence on the ironing force has been analysed of main technological parameters such as the ironing rate, semicone angle, the ratio of inside radius to outside radius, the lenghth of the working land of the...

通过优化计算，变薄拉深力理论值与实验值吻合良好；用该模型研究了变薄拉深系数、凹模半锥角、原始筒形件内外径比、定径带相对长度以及内外摩擦因子等主要工艺参数对变薄拉深力的影响规律。

Compared with even die-drawing, camber die-drawing's limit drawing coefficient is detracted, so efficiency is increased.

曲面凹模拉深与平端面凹模拉深相比，降低了极限拉深系数，减少工序、提高了效率，降低了成本。

Analysis of the performance of magnesium alloy AZ31, the existence of room temperature can not be the issue of drawing, through a detailed analysis of parts and access to relevant technical information, design process in deep drawing dies and parts for heating the drawing die, so it is easy to resolve these issues.

分析镁合金AZ31的性能，存在常温下不可拉深的问题，通过对零件进行详尽的分析和查阅相关技术资料，设计了在拉深过程中对模具和零件进行加热的拉深模，这样就很容易的解决了上述问题。

General assumptions of the shell theory are applied to the model and the normal stress of sheet metal is assumed to be equal to zero.

拉深筋提供的进料阻力对控制金属流动起着重要的作用，所以拉深筋的设计是整个拉深模设计的一个重要组成部分。

In addition, the blank holding force that is required to avoid wrinkle and rupture during conical part deep drawing is researched. The necessity of reasonable blank holding force in pressing is expounded. From the view of mechanical analysis, the wrinkle critical condition of side-wall is derived for the first time by the stress state of side-wall, the main deformation region on blank. According to the critical condition of plastic instability for flange, side--wall, corner of punch on blank, The blank holding force in conical part deep drawing is divided into four different regions within its forming figure. The basic principle of reasonable blank holding force during stamping is summarized and provided. The mathematical model of reasonable blank holding force that avoids the wrinkle and rupture is established and verified by the finite element numerical simulation and the grid experiment method. The result shows that it is accurate and reliable.

此外，本文还研究了圆锥形件拉深成形过程中，随着拉深变形过程的进行，毛坯为避免产生起皱、破坏缺陷而对压边力的需求情况，阐明了圆锥形件拉深成形过程中压边力合理变化的必要性；由毛坯主要变形区悬空锥壁部分的受力变形情况，从力学分析的角度，首次推导得出了圆锥形零件悬空锥壁起皱失稳的临界条件；并根据主要变形区法兰、悬空锥壁及凸模圆角部分的塑性失稳临界条件，在其成形范围图中，将圆锥形件成形过程中的压边力划分为四个区域；总结并提出了圆锥形件成形过程中压边力合理变化的基本原则；建立了防止起皱、破坏缺陷产生的压边力合理变化的数学模式，并得到了有限元数值模拟及网格实验法的验证，证实了理论分析结果的正确性和可靠性。

This brought fixed cost, but it also is meant at the same time use a source to won't make you singlehanded assume a problem.

这带来了一定的成本，但它同时也意味着使用开源不会让你独力承担问题。

He gained a small fortune in real estate.

他在房地产上发了一笔小财。