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.
出处
《机械科学与技术》
CSCD
北大核心
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
关键词
楔横轧轴件
浮压法
心部空洞
数值模拟
CWR shaft
floating-pressure method
core void
numerical simulation
