基于正/逆向混合技术的发动机数模重构  

Digital Analog Reconstruction Of Engine Based on Forward/Reverse Mixing Technology

作　　者：李卫民[1] 丛伟 潘士超 陈肖依 LI Wei-min;CONG Wei;PAN Shi-chao;Chen Xiao-yi(College of Mechanical Engineering and Automation,Liaoning University of Technology,Jinzhou 121001,China)

机构地区：[1]辽宁工业大学机械工程与自动化学院,辽宁锦州121001

出　　处：《辽宁工业大学学报（自然科学版）》2022年第2期71-77,87,共8页Journal of Liaoning University of Technology(Natural Science Edition)

基　　金：辽宁省重点科技攻关项目(2014106008);锦州市科学技术计划项目(16A2G32)。

摘　　要：为解决发动机内部进出水道和进排气道因结构形状复杂且用户无法获取内部点云模型数据,而导致传统实体模型重构困难的实际问题,并进一步提高目前传统正/逆向工程设计方法中的传统模型实体重构效率与设计精度,研究正/逆向混合建模设计方法及其应用特点。以4A95TD型汽油发动机为主要研究对象,通过线切割—硅胶填充的组合方法获取精准的内部水道和气道模型,结合使用软件Geomagic Studio以及CATIA等逆向软件工具进行数据复杂处理与再设计优化。最后,建立完整发动机三维数字模型。通过对模型误差精度的分析,重要结合面的精度符合模型建模精度要求,验证了正/逆向混合建模技术的正确性与合理性,对发动机组合结构性能预测、疲劳分析和结构维修具有一定的参考意义。In order to solve the problem of difficult reconstruction of the traditional solid model due to the complicated structure and shape of the engine’s internal water inlet and outlet channels and the user’s inability to obtain the internal point cloud model data,and to further improve the current traditional forward/reverse engineering design methods,traditional model entity reconstruction efficiency and design accuracy,forward/reverse hybrid modeling design method and its application characteristics are studied.Taking the 4A95TD gasoline engine as the main research object,the precise internal waterway and airway model is obtained through the combined method of wire cutting and silica gel filling,and the software Geomagic Studio and reverse software tools such as CATIA are used to carry out complex data processing and redesign optimization.Finally,a complete three-dimensional digital model of the engine is established.Through the analysis of the model error accuracy,the accuracy of the important bonding surface meets the modeling accuracy requirements,the correctness and rationality of the forward/reverse hybrid modeling technology is verified,and it is useful for the performance prediction,fatigue analysis and structural maintenance of the engine composite structure.

关 键 词：逆向工程 发动机 正/逆向混合技术 误差分析 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]