Study on Optimal Design of snap-fit Considering Assembly/Disassembly

本文研究了考虑装配/拆卸能力的卡套优化设计。研究结果如下：根据2001年和2002年的研究成果和国内外其他研究成果，对卡合设计方法进行了系统化。与系统化相对应，按其定义、材料、形状、类别（定位器、锁）、形状设计要领（基梁厚度、梁长、插入面角、连接面深度、连接面角、梁尖厚度、梁宽、基角）、形状设计等进行组织。(2)最佳卡扣结构设计为了找到考虑装配/拆卸能力的最佳卡扣结构，进行了理论分析和有限元分析。开发了一种合扣性能试验机，用于测量装配和拆卸过程中所需的力，并根据结果评估连接性。结果表明，空槽卡合和角（非直角）连接平面卡合具有较好的拆装能力，是本研究的最优设计。

In this research, optimum design of snap-fit is studied by which assembly/disassembly abilities are considered. The results of study are listed as below.(1) Systemization of snap-fit design methodBased on the results obtained from researches done in year 2001 and 2002 and other domestic/foreign research results, snap-fit design method is systemized. Correspondence to the systemization, snap-fit is organized by its definition, material, shape, categories (locator, lock), shape design know-how (base beam thickness, beam length, insert plane angle, connection plane depth, connection plane angle, beam tip thickness, beam width, base fillet), shape design and so on.(2) Design of optimum snap-fit configurationIn order to find the optimum snap-fit configuration by which assembly/disassembly abilities are considered, theoretical analysis and FEM analysis have been performed. A snap-fit performance testing machine is developed to measure the forces required during assembly and disassembly, where by connectivity is evaluated from the results. From the results, it is observed that snap-fit with empty slot and angular (non right angle) connection plane possess good assembly/disassembly abilities, thus they are considered as optimum designs in this study.