航空发动机叶片微束等离子堆焊转角焊缝模型研究
Study on Fillet Weld Model of Micro-Plasma Surfacing for Aero-Engine Blade
肖洋 1戴士杰 1李世博 1母嘉恒1
作者信息
- 1. 河北工业大学 省部共建电工装备可靠性与智能化国家重点实验室,天津 300130;河北工业大学 机械工程学院,天津 300130
- 折叠
摘要
航空发动机叶片修复时,将受损部位切除后在新平面上进行多层多道焊接,在焊缝转角区域特别是转角点,因焊接工艺难以匹配导致过多熔滴进入熔池增加了焊缝熔高与熔宽,造成焊缝凸起,影响焊接质量.针对微束等离子焊接叶片转角区域焊缝的这种特征,建立了转角区域焊缝模型.首先利用抛物线曲线拟合建立了单道焊缝模型,并通过实验验证该模型能准确地表征单缝外形轮廓.然后提出了一种双焊缝转角重叠的焊缝成型模型.实验表明,采用该转角焊缝模型能够极大地降低转角区域焊缝的凸起,能满足航空发动机叶片修复精度的要求.
Abstract
During the repair of aero-engine blade,the damaged part was firstly cut off,then multi-layer and multi-pass welding was carried out in the new plane.At the weld corner area especially corner point,due to improper welding process,too many droplets enter the weld pool to increase the weld height and width,which causes weld bulge and affects the welding quality.According to the weld characteristics of the corner zone of the blade during micro-plasma arc welding,the weld model of the corner zone was established.Firstly,a single pass welding seam model was established by Parabola curve fitting method,and the model was proved to be able to describe the profile of single pass welding seam accurately.Then,a weld forming model of double-weld fillet overlapping was proposed.The experiment shows that the model can greatly reduce the bulge of the fillet weld,and it can meet the requirements of the repairing precision of the aero-engine blade.
关键词
航空发动机叶片/微束等离子焊接/单缝模型/转角焊缝模型Key words
aero-engine blade/micro-plasma arc welding/single pass model/fillet weld model引用本文复制引用
基金项目
国家重点研发计划(2019YFB1311104)
出版年
2024
NETL
NSTL
万方数据