本实用新型涉及一种轮胎钢圈扩张模瓣结构,一种轮胎钢圈扩张模瓣结构,包括沿圆周方向均匀分布的十二片模瓣,模瓣上设置有通孔,模瓣内端面设置有倒角,模瓣外端面设置有将轮胎钢圈进行扩折加工的的扩折部,模瓣两侧设置有定位导向凸台,本实用新型具有以下有益效果:结构简单,设计合理,能实现轮胎钢圈的扩张成型,定位导向凸台呈三角形状,保证工作时十二片 The utility model relates to a tire rims expansion die structure and a tire rims expansion die structure which comprises twelve die plates uniformly distributed in a circumferential direction and provided with through holes on the die plate, The utility model has the following beneficial effects: the structure is simple, the design is reasonable, and the utility model has the advantages that: the utility model has the following advantages: To achieve the expansion of tire rims, positioning guide boss triangular shape to ensure the work of twelve