浮压法压实楔横轧轴件心部空洞的机理研究  

Study on Compacting Mechanism of Core Void for Cross Wedge Rolling Shaft using Floating-pressure Method

作　　者：田端阳 束学道[1,2] 王雨[1,2] 魏伊伦 殷安民[1,2] 

机构地区：[1]宁波大学机械工程与力学学院,浙江宁波315211 [2]浙江省零件轧制成形技术研究重点实验室,浙江宁波3152111

出　　处：《机械科学与技术》2017年第7期1079-1084,共6页Mechanical Science and Technology for Aerospace Engineering

基　　金：国家自然科学基金项目(51475247);浙江省科技计划项目(2016C31018)资助

摘　　要：为有效地消除心部空洞,提高楔横轧轴件的机械性能,提出利用高压气体压实楔横轧轴件心部空洞的新方法,简称浮压法。利用DEFORM-3D有限元软件,研究了浮压法实现轴件心部空洞闭合的机理和工艺参数的影响规律。结果表明:心部空洞闭合的条件是高温轴件应受三向压应力、负平均应力和较大的剪应力共同作用;气压或轴件温度越高,空洞闭合就越快,但对轴件外形尺寸几乎没有影响。In order to effectively eliminate the core void and improve the mechanical properties of CWR shaft, a new method with high-pressure gas to compact CWR shaft core void, briefly called floating-pressure method, is put forward. The mechanism of void closure and the influence law of the processing parameters is investigated with DEFORM-3D. The results show the condition of core void closure is that the high-temperature shaft should be subjected via three directional compressive stress, negative mean stress and large shear stress; the higher the gas pressure or the shaft temperature is, the more quickly the void close, but there is the slight effect on the shafts＇ shape and size.

关 键 词：楔横轧轴件 浮压法 心部空洞 数值模拟 

分 类 号：TG376.2[金属学及工艺—金属压力加工]