超大规格GH4169高温合金螺栓成形工艺及模具结构优化  

Forming process and die structure optimization of super large size GH4169 superalloy bolt

作　　者：刘乐 殷银银 金宏 关悦 刘秀岩 LIU Le;YIN Yinyin;JIN Hong;GUAN Yue;LIU Xiuyan(①Henan Provincial Key Laboratory of Fastening Technology,Xinyang 464000,CHN;Henan Aerospace Precision Manufacturing Co.,Ltd.,Xinyang 464000,CHN;③Aerospace Seiko Co.,Ltd.,Tianjin 300300,CHN)

机构地区：[1]河南省紧固连接技术重点实验室,河南信阳464000 [2]河南航天精工制造有限公司,河南信阳464000 [3]航天精工股份有限公司,天津300300

出　　处：《制造技术与机床》2022年第4期110-115,共6页Manufacturing Technology & Machine Tool

基　　金：“高档数控机床与基础制造装备”科技重大专项资助项目(2013ZX04002081)。

摘　　要：针对大规格GH4169高温合金螺栓成形难度大、模具易开裂寿命低等问题,研究其成形工艺及模具结构。结合金属塑性成形理论,提出其成形工艺方案。采用Deform-3D有限元分析软件对提出的工艺方案进行数值模拟,分析了成形过程中的载荷-行程曲线、金属流动规律等,根据成形工艺,设计并优化相应模具结构,最后进行了工艺试验。通过数值模拟,获得了成形过程中的工艺参数,揭示了GH4169高温合金螺栓成形过程的变形机理。采用双层预应力组合凹模时,模具出现开裂,模具结构优化后采用三层预应力组合凹模满足成形要求,模具寿命较高,小批量试制的GH4169高温合金螺栓锻件充填饱满,所获数据与模拟结果基本一致。提出的GH4169高温合金螺栓成形工艺和模具结构是可行的,成形出的高温合金螺栓符合航天领域实使用要求,为大规格GH4169高温合金螺栓的生产提供一定的理论依据,对实际生产及其他相似零件具有指导意义。The paper aims to study the forming process and die structure of large size GH4169 superalloy bolt in order to solve the problems of difficult forming,easy cracking and low service life of the die.Combined with the theory of metal plastic forming,the forming process scheme is put forward.The proposed process scheme is numerically simulated by Deform-3D finite element analysis software.The load stroke curve and metal flow law in the forming process are analyzed.According to the forming process,the corresponding die structure is designed and optimized.Finally,the process test is carried out.Through numerical simulation,the process parameters in the forming process are obtained,and the deformation mechanism of GH4169 superalloy bolt forming process is revealed.When the double-layer prestressed composite die is used,the die cracks.After the die structure is optimized,the three-layer prestressed composite die is used to meet the forming requirements,the die life is high,and the GH4169 superalloy bolt forgings trial produced in small batch are fully filled.The data obtained are basically consistent with the simulation results.The forming process and die structure of GH4169 superalloy bolt proposed in this paper are feasible.The formed superalloy bolt meets the practical application requirements in the aerospace field,provides a certain theoretical basis for the production of large-size GH4169 superalloy bolt,and has guiding significance for the actual production and other similar parts.

关 键 词：GH4169高温合金 数值模拟 模具结构 工艺试验 

分 类 号：TG146.1[一般工业技术—材料科学与工程]