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清华大学学报(自然科学版)  2014, Vol. 54 Issue (2): 191-196    
  论文 本期目录 | 过刊浏览 | 高级检索 |
旋挖钻机钻杆键条焊接接头的残余应力
赵海燕1(),徐兴全1,于兴哲2,朱小武3
2. 北京市三一重机有限公司, 北京 102206
3. 北京伊萨科技发展有限公司(ESI中国), 北京 100080
Residual welding stresses in the pipe-bar joints of a rotary drilling rig
Haiyan ZHAO1(),Xingquan XU1,Xingzhe YU2,Xiaowu ZHU3
1. Department of Mechanical Engineering, Tsinghua University, Beijing 100084, China
2. Beijing Sany Heavy Machinery Co., Ltd, Beijing 102206, China
3. ESI-Group (Beijing) Co., Ltd, Beijing 100080, China
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摘要 

钻杆是旋挖钻机的关键部件之一,也是易损部件,其损坏部位大多位于钻杆键条焊接接头处。该文采用SYSWELD软件对旋挖钻机钻杆键条接头的焊接过程进行了数值计算,并用X射线衍射法对实际钻杆键条焊接接头试样的残余应力进行了测量,得到了接头焊接完成后的残余应力分布。针对钻杆结构受力特点,着重分析了切向焊接残余应力的分布特征,并计算对比了焊接速度的影响。结果表明: 焊接接头最大残余拉应力出现在热影响区内;随焊接速度的增加,管体上切向最大压应力明显增大,最大拉应力变化不明显。

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赵海燕
徐兴全
于兴哲
朱小武
关键词 残余应力旋挖钻机钻杆键条接头有限元模拟    
Abstract

The drill rod is one of the most important components of a rotary drilling rig and it is highly stressed. The pipe-bar welded joints are most likely to be damaged. The welding of pipe-bar joints is simulated using the SYSWELD software to calculate the residual welding stresses for comparison with measured residual welding stresses by X-ray diffraction. The calculated results are in good agreement with the measured data. The welding speed is then changed to study its effect on the residual welding stresses. The results show that the maximum tensile stress exists at the heat affected zone. With the increase of welding speed, the maximum tangential compressive stress increases, but the maximum tensile stress has no significant change.

Key wordsresidual stress    rotary drilling rig    pipe-bar joint    finite element simulation
收稿日期: 2013-03-16      出版日期: 2015-04-16
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引用本文:   
赵海燕, 徐兴全, 于兴哲, 朱小武. 旋挖钻机钻杆键条焊接接头的残余应力[J]. 清华大学学报(自然科学版), 2014, 54(2): 191-196.
Haiyan ZHAO, Xingquan XU, Xingzhe YU, Xiaowu ZHU. Residual welding stresses in the pipe-bar joints of a rotary drilling rig. Journal of Tsinghua University(Science and Technology), 2014, 54(2): 191-196.
链接本文:  
http://jst.tsinghuajournals.com/CN/  或          http://jst.tsinghuajournals.com/CN/Y2014/V54/I2/191
  旋挖钻机钻杆结构示意图
  钻杆键条焊接接头焊缝分布
C Cr Mn Si S P
键条 0.14~0.19 0.80~1.10 1.00~1.30 ≤0.40 ≤0.035 ≤0.035
焊丝 0.085 0.41 1.54 0.11
管材 ≤0.20 ≤1.60 ≤0.55 ≤0.035 ≤0.035
  选取材料各化学成分的质量分数%
  键条材料的主要性能
  焊丝材料的主要性能
  管体材料的主要性能
  钻杆实物照片
  钻杆键条接头3维几何模型
  钻杆平面应变模型
  键条坡口示意图
  熔池形状的计算结果与实验结果的对比
  坐标系方向(残余应力)定义
  钻杆横截面焊接残余应力分布
  试样测量点
  轴向残余应力计算值与测量值对比
  不同焊接速度下的切向残余应力分布曲线
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