20钢管A-TIG大钝边打底焊法
Largeblunt edge root welding method for A-TIG of 20 steel pipe
张丹丹 1张治国 1庞启1
作者信息
- 1. 陇南师范高等专科学校机电工程学院,甘肃省陇南市 742500
- 折叠
摘要
利用手工A-TIG焊对20钢管进行了大钝边打底焊研究.钝边尺寸及装配间隙合理时,在适当工艺参数支持下,可实现活性TIG焊全位置大钝边打底焊接.活性剂作用下熔池表面张力方向的改变是影响A-TIG全位置大钝边打底焊成型的重要因素.平焊位置,内表面张力σ2是平衡向下的重力G与电弧力Fa的重要作用力;立焊位置,内表面张力σ2是平衡水平电弧力Fa主要作用力;仰焊位置,外表面张力σ1与内表面张力σ2是克服重力G的重要作用力.
Abstract
A study was conducted on the large blunt edge root welding of 20 steel pipes using manual A-TIG welding.When the size of the blunt edge and the assembly gap are reasonable,with the support of appropriate process pa-rameters,A-TIG welding with full position large blunt edge root can be achieved.The change in surface tension di-rection of the molten pool under the action of an activator is an important factor affecting the formation of A-TIG full position large blunt edge root welding.In the flat welding position,the inner surface tension σ2 is the important force that balances the downward gravity G and the arc force Fa;At the vertical welding position,the inner surface tension σ2 is the main force that balances the horizontal arc force Fa;At the overhead welding position,the outer surface tension σ1.Internal surface tension σ2 is an important force to overcome gravity G.
关键词
活性TIG焊/大钝边/打底焊/全位置Key words
A-TIG welding/large blunt edge/root welding/all position引用本文复制引用
基金项目
2023年甘肃省高校教师创新基金项目(2023B-415)
甘肃省陇南市2022年科技计划项目(2022-S·JH-09)
2021年陇南师范高等专科学校校级教学改革重点项目(JXGG2021009)
出版年
2024
NETL
NSTL
万方数据