Influencing Factor Analysis and Improvement Study of Bending Edge Crack of Some Throw Igniter
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摘要:针对某抛射具收口后出现壳体裂纹的问题，在分析影响因素的基础上进行了设计改进和工艺改进，并开展力学性能试验、随弹试验验证及多个批次产品生产交付。研究结果表明：收口效果与壳体材质、收口部位尺寸、封口垫材质与尺寸、收口工艺等因素密切相关；壳体材质选择应综合考虑结构强度及材质延展性等要求；封口垫宜选择与壳体相同的材质，尺寸不宜过薄，且应进行倒角设计；采用壳体成品退火工艺可有效解决收口裂纹问题。
Abstract:In view of the crack problem generated after some throw igniter shell edge being bended，the influencing factors were analyzed, the design improvement and the technology improvement were carried out. Meanwhile, the mechanical performance test, the following bomb test, the production and delivery of multiple batches of products were carried out. The study show that the bending edge effect is closely related to the shell material, the size of the bending edge part, the material and size of the sealing gasket, and the bending edge technology. The selection of shell material should comprehensively consider the requirements of structural strength and material ductility. The sealing gasket should be made of the same material as the shell, the size should not be too thin, and the chamfering design should be carried out. The annealing of finished products shell can effectively solve the bending edge crack problem.
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