郭巨寿,于霞,李爱平,等.发动机泵体精密热模锻成形工艺研究[J].精密成形工程,2014,6(6):111-115,126.
GUO Ju-shou,YU Xia,LI Ai-ping,et al.Precision Hot-die Forging Process of Engine Pump Body[J].Journal of Netshape Forming Engineering,2014,6(6):111-115,126. |
| 发动机泵体精密热模锻成形工艺研究 |
| Precision Hot-die Forging Process of Engine Pump Body |
| 投稿时间：2014-09-26 修订日期：2014-11-10 |
| DOI：10.3969/j.issn.1674-6457.2014.06.018 |
| 中文关键词: 泵体 成形机理 数值模拟 试验验证 |
| 英文关键词: pump body forming mechanism, numerical simulation experimental verification |
| 基金项目: |
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| 摘要点击次数: 4261 |
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| 中文摘要: |
| 目的 为了提高发动机泵体综合机械性能和降低制造成本,采用精密热模锻技术来实现泵体的精确成形。方法 通过确定锻件分模面位置,建立了泵体精密热模锻几何实体模型;在此基础上,建立了泵体热模锻过程三维有限元模型和模拟参数,实现了精密热模锻过程有限元模拟模型。结果 通过数值模拟,获得了成形过程中坯料的速度场、等效应变场和温度场及载荷-行程曲线,揭示了泵体热模锻过程中金属充填模具型腔的情况及其变形机理,获得了温度场应变分布以及载荷、打击能量随行程的变化规律,优化了预成形时拍方坯料长度等参数,为确定成形工艺参数提供了科学依据。结论 经试验验证,新工艺成形的锻件非加工外形面尺寸精度达到了零件要求,数值模拟结果与实验结果一致。 |
| 英文摘要: |
| Objective In order to improve the mechanical properties and to decrease the production cost of engine pump body, precision hot forging process was employed to manufacture the part. Methods Based on the determination of parting face position of the part, the solid geometric model was established for the precision hot-die forging of pump body. A 3D finite-element model and the simulation parameters for the forging process were built, and the finite element simulation model for precision hot-die forging was achieved. Results The distributions of velocity field, equivalent Mises plastic strain field and temperature field, as well as the curves of load and blow energy with displacement were obtained through numerical simulation. The results revealed the metal filling of the mold cavity during the hot-die forging process of the pump body and the deformation mechanism. The strain distribution of temperature field and the variation laws of the load and the blow energy with displacement were obtained. The process parameters during the preforming process such as the length of the square billets were optimized, which provided scientific reference for the determination of forming process parameters. Conclusion The accuracy of the non-working surface of the forgings formed with the new process could meet the requirements as verified by experiments, and the results of numerical simulation were consistent with those of experiments. |
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