Journal of South China University of Technology (Natural Science Edition) ›› 2008, Vol. 36 ›› Issue (8): 69-74.

• Mechanical Engineering • Previous Articles     Next Articles

Development of Automatic Submerged Arc Welding Equipment with Digital Control

Huang Shi-sheng  He Kuan-fang  Sun De-yi  Li Peng   

  1. School of Mechanical and Automotive Engineering, South China University of Technology, Guangzhou 510640, Guangdong, China
  • Received:2007-10-12 Revised:2008-01-02 Online:2008-08-25 Published:2008-08-25
  • Contact: 黄石生（1938-），男，教授，博士生导师，主要从事现代弧焊装备及其智能控制研究． E-mail:sshuang@scut．edu．cn
  • About author:黄石生（1938-），男，教授，博士生导师，主要从事现代弧焊装备及其智能控制研究．
  • Supported by:

    国家自然科学基金资助项目（50575074）

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Abstract:

In order to implement the automatic and intellectualized operation of submerged arc welding, a digital device is developed by combining the digital control technology, the fuzzy control strategy and the power modulation technology. Then, based on the analysis of the technological requirements of submerged arc welding, the double closed-loop control mode and the limitation of the minimum pulsed width are introduced to realize the external cha- racteristics suitable for the submerged arc welding with outer-drawing current. Moreover, a controller with a dualcore processor is designed for the automatic submerged arc welding. In this controller, 80C320 and 80C552 singlechips are respectively used to control the external characteristics of the power source and the welding process via the logic control strategy, and the data are exchanged via the serial communication of RS-485. Experimental results show that the developed digital device is of operational convenience, running credibility, welding stability, high ignition rate and excellent molding effect.

Key words: submerged arc welding, digital device, external characteristic, dual-core processor