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带内阶梯孔空心轴的心轴锻造及缩颈工艺研究

Study on Mandrel Forging and Necking Process of a Hollow Shaft with an Inner Stepped Hole.

作者信息

Ge Xiqing, Tian Chensheng, Lu Yupeng, Wang Guangchun

机构信息

Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials (Ministry of Education), Shandong University, Jinan 250061, China.

出版信息

Materials (Basel). 2022 Aug 7;15(15):5431. doi: 10.3390/ma15155431.

DOI:10.3390/ma15155431
PMID:35955366
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9370004/
Abstract

An advanced process of mandrel forging and necking (MFN) was proposed for a hollow shaft with an inner stepped hole. The conventional mandrel forging process with an equal-diameter mandrel was used to form the outer stepped preform, and then the preform was formed into the hollow shaft with an inner stepped hole using the MFN process. A numerical simulation model was established to study the effect of the pressing reduction and the rotation angle on the MFN process. A preforming design method based on the isometric radius difference was given according to the principle of the equal volume, and the parameter relationships between the outer and inner stepped shapes were clarified. The experimental deformation laws of the MFN process were consistent with those obtained by the simulation. The MFN process and its preforming design method provide a new free forging approach for large hollow forgings with inner stepped holes.

摘要

针对带有内阶梯孔的空心轴，提出了一种芯轴锻造与缩颈（MFN）的先进工艺。采用等直径芯轴的传统芯轴锻造工艺来形成外阶梯预成型件，然后使用MFN工艺将预成型件加工成带有内阶梯孔的空心轴。建立了数值模拟模型，以研究压下量和旋转角度对MFN工艺的影响。根据等体积原理给出了基于等距半径差的预成型设计方法，明确了外、内阶梯形状之间的参数关系。MFN工艺的实验变形规律与模拟结果一致。MFN工艺及其预成型设计方法为带有内阶梯孔的大型空心锻件提供了一种新的自由锻造方法。

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本文引用的文献

1
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Materials (Basel). 2019 Apr 10;12(7):1175. doi: 10.3390/ma12071175.