摘要
铝合金矩形管绕弯成形时,截面畸变及回弹等问题严重影响弯曲件的几何精度,为了控制铝合金矩形管绕弯成形时弯曲件的尺寸精度,本文采用试验与理论相结合的方法研究了材料屈服强度及相对弯曲半径对矩形管截面畸变与回弹的影响.结果表明:随着屈服强度的增加,截面畸变及曲率半径回弹率也增加,但垂直径向方向的截面畸变变化相对较小;随着相对弯曲半径的增加,径向方向截面畸变及曲率半径回弹率逐渐减小,垂直径向方向截面畸变相差甚微.这为提高铝合金矩形管绕弯精度提供了有效途径.
Cross section distortion and spring back affect the geometric accuracy of bending parts of aluminum rectangular tube in rotary-draw bending. To control dimension precision of bending parts, the influence of yield strength and relative bending radius on the cross section distortion and spring back was studied by experiment and theoretical analysis. The results showed that the cross section distortion and spring back of radius of curvature increased with the increase of yield strength, but the cross section distortion at vertical radial direction changed relatively little. With the increase of the relative bending radius, the cross section distortion at radial direction and spring back degree of radius of curvature decreased gradually. Whereas the cross section distortion at vertical radial direction changed little.
出处
《材料科学与工艺》
EI
CAS
CSCD
北大核心
2014年第1期88-93,共6页
Materials Science and Technology
关键词
矩形管
绕弯成形
截面畸变
回弹
尺寸精度
rectangular tube
rotary-draw bending
cross section distortion
spring back
dimension precision
