汽油机甩油齿轮组件压装模设计

Design of press-mounting mold for gasoline engine fuel injection gear assemblies

针对铝合金孔在钢质轴压入过程中屡遭破坏且不能保证轴向装配间隙的质量问题,分析甩油齿轮组件内部结构及装配技术要求,运用6点定位原理,设计10个定位点,对轴和孔分别实施完全定位;设计抽插式U形塞尺,定量控制甩油齿轮组件装配的轴向总间隙;设计导向元件,保证甩油齿轮轴压装过程的正确位置。使用结果表明:压装模具完全能满足甩油齿轮组件装配的生产规模及技术要求。

Repeated destruction of aluminum alloy hole occurs in steel shaft press- in process and axial assembly clearance always cannot be guaranteed. Based on the analysis of internal structure of fuel injection gear assemblies and requirement of assembly technology,this study designed ten locators using six- point positioning principle,which could completely locate the shaft and the hole,respectively. Furthermore,removable U- shaped feeler gage was designed to quantitative control total axial clearance in fuel injection gear assembly. Orientation elements were designed to guarantee the correct position of fuel injection gear shaft in press- mounting process. The results showed that the press- mounting mold could completely meet the production scale and technical requirements of fuel injection gear assembly.