摘要
通过有限元数值模拟和实验 ,研究了扩径率和重叠量对制品品质的影响及其规律。结果表明 ,扩径率是影响制品横断面尺寸精度的一个主要因素。制品的椭圆度近似为扩径率的三次函数 ,且在 2 0 %附近有最小值 ;壁厚局部变薄量可以近似表示为扩径率的线性函数。
The influences of expanding-ratio and overlap-length on the quality of finished product was analyzed systematically by elastic-plastic FEM and expanding experiments. Based on the results,expanding-ratio is important to dimensional precision of finished products. The relation between ellipticity of finished product and expanding-ratio is approximate to a cubic expression,and the minimum can be obtained near 2.0% of expanding-ratio. The local thinning of wall-thickness can be described by linear function of expanding-ratio. It has also a slight influence on the spring-back. The influences of overlap-length on the linearity is unnoteworthy. The most important consideration in choosing parameters was given in the paper.
出处
《中国机械工程》
EI
CAS
CSCD
北大核心
2004年第12期1111-1114,共4页
China Mechanical Engineering
基金
河北省自然科学基金资助项目 (5 0 3 3 0 1)
关键词
机械扩径
工艺参数
数值分析
筒形件
钢管
mechanical expanding
parameter of process
numerical simulation
tubular part
pipe
