简述了缸体砂型铸造流水线下芯夹具应用现状,以及使用中存在的不足之处。经过多次试验、设计,运用动态仿生学对下芯夹具的结构做出局部调整,即平移机构代替杠杆机构。阐述了采用多层式下芯夹具的齿条带动齿轮平移运动机构以及夹紧机构同步性等的优化设计。在实际生产中,取得了良好的效果。在一定尺寸的铸件成型中,具有通用性。 The status quo of the application of the lower core clamp in the sand mold casting line and the shortcomings in use are described. After several tests, design, the use of dynamic bionics to make a partial adjustment of the structure of the core clamp, the translation mechanism instead of the lever mechanism. The optimization design of gear shifting mechanism driven by rack with multi-layer lower core clamp and synchronization of clamping mechanism is expounded. In actual production, has achieved good results. In a certain size of casting molding, with versatility.