|
| 论文摘要样例2 |
| 2002年11月22日15:08:25 新东方 |
Physical Modeling of V-shape Anvils' Forging Process By Using Moire Method
Abstract
With the increase in the size and weight of an ingot, the defects such as cavities and rarefactions, would become more and more serious. The exporation of effective methods and rational procedure parameters for closing the above said defects has now become a very important subject. V-shape anvils' forging method is one of the effective methods and is practiced by many of the plants in the world. In this thesis, the V-shape anvils' forging method applied to heavy forgings is investigated by using photo electric scanning Moire method. By using a newly developed pneumatic apparatus, the "Curves of critical Reduction Ratio", the law of closing internal cavities of various v-shape anvil angles and various anvil width ratio are obtained. The internal deformation and strain distributions have been measured in the whole field of deformation in terms of Moire method. On the basis of analyzing these experimental results, the optimum angle of V-shape anvil, the optimum anvil width ratio (W/DO) and the relation-ship between the closing of internal cavities and strain distributions have been discussed.
The main conclusions are as follow:
The optimum angle of V-shape anvil is 1350, the optimum anvil width ratio is W/DO=0.6
According to the law of closing cavities, the forging billet should be tumed 900 when V-shape anvils are used.
The equivalent strain Ei is an important factor in determining the cavities' closing. The more the value of Ei, the easier the cavities close.
The feasibility and visualizations of Moire method when applied to measuring large plastic deformation, especially to the investigation of forging procedures have been proved.
(Key Words: Physical Modeling, V-shape Anvils' Forging Method, Critical Reduction, Moire Method, Strain Stress)
|
手机短信，推荐新闻给好友 |
| 【我要发表评论】
【】
【关闭窗口】
|
|
|
 |
| 相关文章 |
|
| 最近一小时热门文章 |
|
| 频道精选 |
|
