液态模锻抽芯力形成分析及抽芯力理论公式推导  

Theoretical Derivation of Expressions on Core-pulling Force in Liquid Forging

作　　者：王家宣[1] 陈英 姜丽红[3] 李春[1] 

机构地区：[1]南昌航空大学航空制造工程学院,江西南昌330063 [2]九江国科远大机电有限公司,江西九江330411 [3]江西现代职业技术学院,江西南昌330095

出　　处：《热加工工艺》2010年第23期113-116,共4页Hot Working Technology

摘　　要：在液态模锻成形孔形件时,通过对液态金属在凝固前后对型芯的作用产生包紧力进行分析;充分考虑可能影响抽拔力的因素,建立力学模型,分别推导出圆形和正多边形截面孔的型芯抽拔力计算公式。它们基本反映了液态模锻成形的特点,以及影响抽拔力的比压、拔模斜度、壁厚和涂料等主要因素。公式不仅适用于液态模锻,也适合金属型铸造和压铸、低压铸造。The clamping force which the molten metal exerted on the core before and after its solidification was analyzed in liquid forging;taking into account the factors of influencing core-pulling force and setting up mechanical model,the equations used for calculating the core-pulling force with circular and polygonal section core hole were deduced,respectively.They primarily showed the feature of liquid forging process and the major factors of influencing of core-pulling force,such as metal pressure,pattern draft,wall thickness and coating.The formulas are suitable to liquid forging,metal die casting,die-casting and low pressure casting.

关 键 词：液态模锻 抽拔力 包紧力 理论推导 

分 类 号：TG315.2[金属学及工艺—金属压力加工]