Abstract: The McPherson suspension, one of the most widely used independent suspensions in automobiles, features complex free-form surfaces and a multi-component structure, making it a typical research object in the field of reverse engineering. This paper proposes a complete digitalization pathway for the McPherson suspension. Firstly, reverse engineering technology is employed to realize the geometric reconstruction of the McPherson independent suspension, converting physical objects into visualizable surfaces and constructing a 3D mesh model of the McPherson suspension. Subsequently, a coordinate measuring machine (CMM) is used to compare the key dimensions of the 3D mesh model, verifying the model accuracy. This paper not only generates the "digital drawings" of the McPherson suspension using 3D scanning and Geomagic Studio software but also demonstrates, through finite element analysis (FEA), the direct application value of this reverse design as the cornerstone of the "digital twin" in subsequent performance verification, topology optimization, and additive manufacturing. It provides a detailed methodological reference for the digitalization of such complex components.

Key words: reverse engineering; 3D scanning; MacPherson suspension; digital twin; FEA

摘要： 麦弗逊悬架是汽车中使用最广泛的独立悬架之一，有着复杂的自由曲面和多组件结构， 是逆向工程领域的典型研究对象。文章提出了一条完整的麦弗逊悬架数字化路径。首先使用 逆向工程技术完成麦弗逊独立悬架的几何重建，将实物转化为可视化曲面，构建麦弗逊悬架 的三维网格模型；再通过三坐标测量机（CMM）对三维网格模型进行关键尺寸比对，验证模 型精度。文章不仅利用三维扫描及 Geomagic Studio 软件生成了麦弗逊悬架的“数字图纸”， 更通过有限元分析（FEA）展示了该逆向设计作为“数字孪生”的基石，在后续性能验证、 拓扑优化与增材制造中的直接应用价值，为该类复杂部件的数字化提供了详尽的方法参考。

关键词: 逆向工程；三维扫描；麦弗逊悬架；数字孪生；有限元分析