All-Position Automatic Welding Process for Tube Sheet of Heat Exchanger

doi:10.3969/j.issn.1000-565X.2010.05.020

Journal of South China University of Technology (Natural Science Edition) ›› 2010, Vol. 38 ›› Issue (5): 100-104.doi: 10.3969/j.issn.1000-565X.2010.05.020

• Mechanical Engineering • Previous Articles Next Articles

All-Position Automatic Welding Process for Tube Sheet of Heat Exchanger

Wang Zhen-min¹ Zhang Dong ²Li Jin¹ Huang Shi-sheng¹

1.School of Mechanical and Automotive Engineering,South China University of Technology,Guangzhou 510640,Guangdong,China;2.School of Electric Power,South China University of Technology,Guangzhou 510640,Guangdong,China

Received:2009-07-03 Revised:2009-08-06 Online:2010-05-25 Published:2010-05-25
Contact: 王振民（1974-），男，博士，副教授，主要从事现代焊接电源研究． E-mail:wangzhm@scut．edu．cn
About author:王振民（1974-），男，博士，副教授，主要从事现代焊接电源研究．
Supported by:
国家自然科学基金资助项目（50805051）; 广东省科技计划项目（2008B010400041）; 中央高校基本科研业务费专项资金资助项目（2009ZM0188）

Abstract

Abstract:

In this paper,the characteristics of the all-position automatic welding procsss for the titanium alloy tube sheet of heat exchanger were analyzed in detail,and some experiments were carried out by using a self-developed full-digital tube sheet welding system.Then,the effects of the main process parameters on the welding quality were explored,and optimal conditions for the welding were determined,that is,a peak current of 80～100A,a base current of 20～30A,a pulse current frequency of 5～10Hz,a duty ratio of 50%,a rotating speed of 3～4r/min and a pulse mode for the current rising and falling.Finally,the correctness of the optimal conditions was verified by the on-site welding of tube sheet of heat exchanger for a 1GW supercritical thermal-power generating unit.

Key words: heat exchanger, titanium alloy tube sheet, all-position automatic welding, welding process

Wang Zhen-min Zhang Dong Li Jin Huang Shi-sheng. All-Position Automatic Welding Process for Tube Sheet of Heat Exchanger[J]. Journal of South China University of Technology (Natural Science Edition), 2010, 38(5): 100-104.

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All-Position Automatic Welding Process for Tube Sheet of Heat Exchanger

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