某型号风机叶轮服役可靠性焊接工艺优化

单龙; 付雷; 孙进; 卢长煜; 方洪渊

doi:10.12073/j.hj.20191119002

某型号风机叶轮服役可靠性焊接工艺优化

单龙¹,
付雷^1,2,
孙进¹,
卢长煜^1,2,
方洪渊^2,

1. 徐州徐工环境技术有限公司, 江苏徐州 221001;
2. 哈尔滨工业大学, 先进焊接与连接国家重点实验室, 哈尔滨 150001

基金项目:

江苏省333工程科研项目(BRA2018271)

详细信息

作者简介:
单龙,1978年出生,硕士;主要从事机械制造设计与研发;已发表论文11篇。

通讯作者:
方洪渊,1956年出生,博士,教授

中图分类号: TG404
计量
- 文章访问数: 22
- HTML全文浏览量: 2
- PDF下载量: 13
出版历程
- 收稿日期: 2019-11-18

Welding process improvement of a certain type of fan impeller in service reliability

1. Xuzhou XCMG Environmental Technology Co., Ltd., Xuzhou 221001, Jiangsu, China;
2. Harbin Institute of Technology, State Key Laboratory of Advanced Welding and Joining, Harbin 150001, China

摘要

摘要: 为提升某型号离心箱式铝合金风机叶轮的焊接结构在服役过程中的可靠性,根据该型号风机叶轮的工作载荷计算了构件中焊道所需临界尺寸。通过有限元模拟仿真,分析了不同焊接规范所产生的焊接残余应力差异及对承载能力的影响。对比不同的焊接规范,定性分析了焊道热裂纹与焊根未焊透对构件承载能力的不利影响,选出了对结构承载能力损失相对较小的焊接工艺规范；双向焊接的焊接残余应力与工作载荷的叠加效应比单向焊接更弱,因而更利于构件的承载能力；焊根未焊透缺陷处于内侧焊道比处于外侧焊道对承载能力更为有利；焊道热裂纹缺陷在外侧焊道比在内侧焊道对承载能力的弱化作用更小。综合考虑焊接残余应力与焊接缺陷对构件承载能力的影响,给出了服役更为可靠的焊接工艺规范。
- 铝合金叶轮 /
- 焊接应力 /
- 焊接缺陷 /
- 有限元计算 /
- 服役可靠性
Abstract: To improve the service reliability of the welded structure of a certain type of centrifugal aluminum alloy fan impeller,the critical length of the bead was checked based on the working load of the fan impeller. The differences in welding residual stresses produced by different welding procedure specification and their effects on the bearing capacity of the welded structure were analyzed by finite element simulation calculations. Comparing different welding procedure specification,qualitative analysis of negative influence of hot crack of bead and incomplete penetration of weld root on the bearing of the component,and a welding procedure specification with relatively small loss of the bearing capacity of the component was selected. The superposition effect of welding residual stress and working load in two-way welding was weaker than one-way welding,so it was more conducive to structural load bearing. Incomplete penetration of weld root in the inner bead were more favorable for loading than that in the outer bead. Hot cracks of weld bead in the outer bead weakened the structural load-bearing capacity less than that in the inner bead. Considering the influence of welding residual stress and welding defects on the bearing capacity of components,a more reliable welding process specification was given.
- aluminum alloy impeller /
- welding stress /
- welding defect /
- finite element calculation /
- service reliability

HTML全文

参考文献(11)

[1]	刘会杰.焊接冶金与焊接性[M].北京:机械工业出版社, 2010.
[2]	续魁昌, 王洪强, 盖京方.风机手册(第2版)[M].北京:机械工业出版社, 2010.
[3]	赵勇, 付娟, 张培磊, 等.焊接方法对6061铝合金焊接接头性能影响的研究[J].江苏科技大学学报(自然科学版), 2006, 20(1):90-94.
[4]	仝红军, 上山智之.低频调制型脉冲MIG焊接方法的工艺特点[J].焊接, 2011(11):33-35.
[5]	方洪渊.焊接结构学(第2版)[M].北京:机械工业出版社, 2017.
[6]	曹淑芬, 陈铁平, 易杰, 等.铝合金双脉冲MIG焊过程的温度及应力变形模拟[J].中国有色金属学报, 2014, 24(7):1685-1692.
[7]	张建强, 张国栋, 赵海燕, 等.铝合金薄板焊接应力三维有限元模拟[J].焊接学报, 2007, 28(6):5-9.
[8]	董志波, 刘雪松, 马瑞, 等.CAE分析大师MSC.Marc工程实例详解[M].北京:人民邮电出版社, 2014.
[9]	李灿, 傅定发, 王冠, 等.焊接顺序对6061-T6铝合金矩形焊缝焊接残余应力及变形量的影响[J].机械工程材料, 2012, 36(7):88-92.
[10]	姚屏, 薛家祥, 蒙万俊, 等.工艺参数对铝合金双脉冲MIG焊焊缝成形的影响[J].焊接学报, 2009, 30(3):69-74.
[11]	姬浩, 段小维.航空用6061铝合金板材组织及焊接性能研究[J].焊管, 2018, 46(6):24-27.