华南理工大学学报(自然科学版) ›› 2011, Vol. 39 ›› Issue (11): 88-91,103.

• 机械工程 • 上一篇    下一篇

脉冲TCGMAW 电流频率对熔滴过渡与焊缝成形的影响

文元美 黄石生 刘桂雄   

  1. 华南理工大学 机械工程学院,广东 广州 510640
  • 收稿日期:2011-03-04 修回日期:2011-07-04 出版日期:2011-11-25 发布日期:2011-10-03
  • 通信作者: 文元美(1968-) ,女,博士后,副教授,主要从事现代电源装备与智能检测研究. E-mail:wen_yuanmei@163.com
  • 作者简介:文元美(1968-) ,女,博士后,副教授,主要从事现代电源装备与智能检测研究.
  • 基金资助:

    国家自然科学基金资助项目( 50875088) ; 中国博士后科学基金资助项目( 2011M500130)

Effect of Current Frequency on Droplet Transfer and Welding Seam Appearance in Pulse TCGMAW

Wen Yuan-mei  Huang Shi-sheng  Liu Gui-xiong   

  1. School of Mechanical and Automotive Engineering,South China University of Technology,Guangzhou 510640,Guangdong,China
  • Received:2011-03-04 Revised:2011-07-04 Online:2011-11-25 Published:2011-10-03
  • Contact: 文元美(1968-) ,女,博士后,副教授,主要从事现代电源装备与智能检测研究. E-mail:wen_yuanmei@163.com
  • About author:文元美(1968-) ,女,博士后,副教授,主要从事现代电源装备与智能检测研究.
  • Supported by:

    国家自然科学基金资助项目( 50875088) ; 中国博士后科学基金资助项目( 2011M500130)

摘要: 基于所建立的高速摄像与电信号检测系统,对高速脉冲双电弧共熔池MAG 焊在不同脉冲电流频率下的熔滴过渡过程进行了观察,并就频率变化对熔滴过渡方式以及焊缝成形质量的影响进行了研究.结果表明: 在实验所采用的焊接规范下,脉冲电流频率较高( 140Hz) 时,前丝熔滴过渡方式为射滴过渡,而后丝熔滴过渡方式为射流过渡; 脉冲电流频率较低( 低于50Hz) 时,前丝、后丝熔滴过渡方式均为射滴过渡; 而当脉冲电流频率在50 ~ 140Hz 间变化时,前丝、后丝熔滴过渡方式均为射流过渡; 脉冲电流频率在50 ~100Hz 间变化时,焊缝成形质量较好.

关键词: 脉冲双电弧共溶池气体保护焊, 熔滴过渡, 焊缝, 脉冲电流频率, 高速摄像系统

Abstract:

By using a self-developed high-speed camera and electrical signal measuring system,the droplet transfer processes of high-speed pulse twin-wire co-pool gas-shielded metal arc welding ( TCGMAW) under different pulse current frequencies were observed,and the effects of pulse current frequency on the droplet transfer and the welding seam appearance were ana-lyzed. Experimental results show that,under the welding specification adopted in this paper,high pulse current frequency ( 140Hz) may result in projected droplet transfer for the front wire and spray transfer for the rear one,while the low frequency less than 50Hz may result in projected droplet transfer for both the front and the rear wires,that the frequency varying form 50 to 140Hz may result in spray droplet transfer for both the front and the rear wires,and that good welding seam appears at the frequencies from 50 to 100Hz.

Key words: pulse twin-wire co-pool gas-shielded metal arc welding, droplet transfer, welding seam, pulse current frequency, high-speed camera system