摩擦对叶片精锻预成形毛坯放置位置影响规律的研究

RESEARCH ON INFLUENCE OF FRICTION ON SETTING POSITION OF PREFORM BILLET IN PRECISION FORGING PROCESS OF BLADE

利用自行开发的叶片锻造过程三维有限元模拟分析系统对不同预成形毛坯在不同摩擦条件下材料充填模腔的过程进行了模拟分析,获得了叶片精锻过程中摩擦对预成形毛坯在模具中放置位置的影响规律:当摩擦因数较小时,材料首先充满左侧型腔,此时,要获得合格叶片精锻件,需将预成形毛坯在模具中的放置位置向右移动,不同截面右移的距离大约是叶片该型面弦长的5％-10％。随着摩擦因数的增大,材料几乎同时充满模具左右侧型腔,说明在该条件下预成形毛坯在模具中的放置位置是比较合理的。该研究对叶片精锻工艺的优化设计具有重要的指导意义。

In order to obtain the influence law of friction on setting position of billet in the blade precision forging process, metal flowing law of different billets in the various friction conditions is simulated and analyzed by using a 3-D FEM code developed by the authors. The results obtained show the folio wings: When friction factor is smaller, the left of the die cavity is filled firstly. Here, in order to obtain a qualified blade, initial billet should be placed a bit to the right of cavity. With the increase of friction factor, the left and right of the die cavity is almost filled simultaneously. Which indicate that the setting position of billet in the die is more reasonable in this simulation condition. This study is of significance to technological design in the blade forging process.