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直齒輪剛性平移兩步成形工藝仿真與試驗(yàn)
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    摘要:

    針對(duì)直齒輪冷鍛成形困難、工作載荷大和模具壽命低等問(wèn)題,提出基于剛性平移的直齒輪兩步成形工藝,即先成形分度圓以外齒形,后完成整齒成形。首先采用有限元法,對(duì)兩步成形工藝的沖擠預(yù)成形和剛性平移終鍛成形過(guò)程分別進(jìn)行了模擬,并提取等效應(yīng)力場(chǎng)和載荷行程曲線進(jìn)行分析;再用物理試驗(yàn)對(duì)數(shù)值模擬結(jié)果加以驗(yàn)證;最后與傳統(tǒng)工藝方案的模擬結(jié)果作對(duì)比。研究結(jié)果表明,剛性平移預(yù)鍛齒形設(shè)計(jì)有利于改善齒輪的充填性,同時(shí)使得工作載荷大幅度降低。

    Abstract:

    There are three main problems in the conventional cold forging process of spur gear: insufficient corner filling; excessive forming force; short life of dies. To avoid these disadvantages, a new forming process, which is the two steps forming technology based on rigid parallel motion, is put forward. Firstly, finite element method is used to simulate the upend forging preformation and rigid parallel motive finish forging process, and equivalent stress field and load-stroke curve are investigated. Secondly, a corresponding experiment is done with pure lead to validate the numerical simulation. Finally, the conventional forging process is also simulated to compare with the new forming process. The results show that the two steps forming process is in favor of improvement of the corner filling condition and decreases the forming force significantly.

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胡成亮,劉全坤,王強(qiáng),劉永熙.直齒輪剛性平移兩步成形工藝仿真與試驗(yàn)[J].農(nóng)業(yè)機(jī)械學(xué)報(bào),2008,39(1):161-164.[J]. Transactions of the Chinese Society for Agricultural Machinery,2008,39(1):161-164.

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