基于正交试验法的液压膨胀芯轴建模与结构优化

Modeling and Structural Optimization of Hydraulic Expansion Mandrels Based on Orthogonal Experimental Design

摘要: 本文以液压膨胀芯轴为研究对象，利用CAD软件建立直筒式液压膨胀芯轴三维简化模型，基于现有理论知识和液压膨胀芯轴内部结构特性进行正交实验设计，选取合适的影响因子并为因子设定相同数量的水平数，利用有限元软件进行静力学分析得到实验结果。对实验结果进行综合分析，得到最优组合，对延长芯轴使用寿命非常具有实践意义。

Abstract: This paper focuses on the study of hydraulic expansion mandrels. A three-dimensional simplified model of a straight-tube hydraulic expansion mandrel is established using CAD software, capturing its essential structural features. Based on existing theoretical knowledge and the internal structural characteristics of hydraulic expansion mandrels, an orthogonal experimental design is formulated. This design selects appropriate influencing factors and assigns an equal number of levels to each factor. Subsequently, a finite element analysis (FEA) is conducted using specialized software to obtain experimental results under static loading conditions. The experimental outcomes are comprehensively analyzed to identify the optimal combination of factors that contribute to the optimal performance of the mandrel. This optimization is crucial for prolonging the mandrel’s service life, thereby enhancing its practical significance in manufacturing processes.