| 摘要: |
| 针对阀体传统制造工艺效率低、锻件性能差、成本高等问题,本文提出采用先进的多向模锻工艺进行阀体制造,并以一种不等径四通阀体为典型对象,结合Deform-3D数值分析进行工艺研究。首先,根据不等径四通阀体的结构特征,确定了分模面,并依此设计了两种锻件图；其次,根据锻件图设计了3种不同的多向模锻结构,并分别确定了模具的加载形式；最后,基于Deform-3D进行了建模分析,对比了3种模具结构下阀体的成形过程、等效应变、成形载荷等。研究表明:当阀体锻件连皮位于中部,且上凸模结构采用组合式凸模结构,下凸模为动模时,模拟获得的阀体锻件充填饱满,质量良好,无缺陷,此时模具受载更小,且成形时间短,利于提高生产效率。基于本文的分析结果进行了四通阀体的试制,获得的阀体表面成形完整,法兰质量良好,内部流线均匀连续,充分说明采用多向模锻工艺进行阀体的制造是可行的。 |
| 关键词: 四通阀体 多向模锻 模具结构 模具加载形式 等效应变 成形载荷 |
| DOI：10.11951/j.issn.1005-0299.20210314 |
| 分类号:TG316.3 |
| 文献标识码:A |
| 基金项目:河北省自然科学基金资助项目(E2016411008). |
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| Multi-directional die forging process for four-way valve body based on finite element simulation |
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YIN Huaying
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(Department of Computer and Information Engineering, Chengde Petroleum College, Chengde 067000, China)
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| Abstract: |
| In view of the problems of low efficiency, poor forging performance, and high cost of traditional manufacturing process for valve body, an advanced multi-directional die forging process was proposed. A four-way valve body which has unequal diameter was taken as the typical object, and the process was studied combined with Deform-3D numerical analysis. Firstly, on the basis of the structural characteristics of the four-way valve body, the parting surface was determined and two forging drawings were designed accordingly. Secondly, three different multi-directional die forging structures were designed according to the forging drawings, and the loading forms of the dies were determined respectively. Finally, modeling analysis was carried out based on Deform-3D, and the forming process, equivalent strain, and forming load of the valve body under three die structures were compared. Results show that when the connecting skin of the valve body forging located in the middle, the upper punch structure was the combined punch structure, and the lower punch was the moving die, the simulated valve body forging was fully filled with good quality and no defects. The die was less loaded with short forming time, which was conducive to improving the production efficiency. Based on the analysis results, the trial production of four-way valve body was carried out. The obtained valve body has complete surface forming, good flange quality, and uniform and continuous internal streamline, which demonstrates that the multi-directional die forging process is feasible for manufacturing valve bodies. |
| Key words: four-way valve body multi-directional die forging die structure loading form of the die equivalent strain forming load |
