扩径率和重叠量对机械扩径制品品质的影响  

Influences of Expanding-ratio and Overlap-length on the Quality of Finished Products

作　　者：郭宝锋[1] 金淼[1] 吴生富[1] 聂绍珉[1] 

机构地区：[1]燕山大学机械工程学院,秦皇岛066004

出　　处：《中国机械工程》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)

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.

关 键 词：机械扩径 工艺参数 数值分析 筒形件 钢管 

分 类 号：TG37[金属学及工艺—金属压力加工]