球面滑履冷挤压模脱模装置的改进设计研究  

Improved design and research of die unloading installation in cold extrusion die of spherical slippery footstep

作　　者：郑伟刚[1] 束昊[1] 吴启山[1,2] 滕生磊[1] 何欣[1] 马潇潇[1] 

机构地区：[1]贵州大学机械工程与自动化学院,贵州贵阳550003 [2]贵州工业职业技术学院机电工程系,贵州贵阳550003

出　　处：《锻压技术》2009年第3期100-102,共3页Forging & Stamping Technology

基　　金：贵州省重大专项基金项目(黔科合重大专项字(2007)60054号)

摘　　要：介绍一种高精度球面滑履零件冷成形模具,在实际应用中该模具能实现滑履成形,但模芯经常断裂,而且滑履挤压件的薄壁端口发生微塑变形。通过对模芯断裂和顶出变形分析,将模芯由台阶配合改作锥面配合,并将模具脱模机构改成梯度脱模,从而很好地解决了模芯断裂和挤压件顶出变形的问题。有效保护模具和保证挤压件尺寸精度,具有较高的应用价值。A high--precision spherical slippery footstep cold forming die was introduced. The die could make slippery footstep take shape, but the die core often broke, and thin-walled port of slippery footstep extruded section had micro- plastic deformation. Through the analysis of the rupture of die core and the pushing-out deformation, it was improved by making conical surface coordinate take the place of step coordinate and using gradient die unloading to displace previous die unloading. The improvement solved the rupture of die core and the pushing-out deformation. It effectively protected the extrusion die and ensured pieces dimensional accuracy. The results show that it has high practical value.

关 键 词：球面滑履 精密挤压模 梯度脱模 

分 类 号：TG385.4[金属学及工艺—金属压力加工]