|
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.
|
|
基金项目：
|
|
贵州省重大专项基金项目(黔科合重大专项字(2007)60054号)
|
|
作者简介：
|
|
|
|
参考文献：
|
[1]吴诗悖.挤压理论[M].北京:国防工业出版社,1994.
[2]蒋定举,束昊,刘霞,等.启动齿星轮冷挤压工艺的模拟分析与研究[J].锻压技术,2008,33(2):80-83.
[3]杨长顺.冷挤压模具设计[M].北京:国防工业出版社,1994.
[4]西田正孝.应力集中[M].李安定,郭廷玮,译.北京:机械工业出版社,1986.
[5]Cocen U,Unel K.Ductility and strength of extruded Sicp/a-luminium-alloy composites[J].Composites Science and Technology,2002,62:275-282.
[6]杨瑞成,季根顺.M2高速钢模具材料静态与动态弯曲性能[J].兰州理工大学学报,1996,22(4):28-31.
[7]李尧.金属塑性成形原理[M].北京:机械工业出版社,2004.
|
|
服务与反馈：
|
|
【文章下载】【加入收藏】
|
|
|
|
