Chairman of American Welding Society visited Kazakhstan

2 pieces in the thickness of the weldment 15 welding current 80 people in the welding process artificially caused the change in arc length 5 system in the arc starting, uphill and pulse current sequence work, the system responds to the process measured waveform 6.

From the waveform, there is no overshoot in the whole process, the response speed is fast, the maximum current fluctuation does not exceed 1 and the error is small, the arc elasticity is good, the combustion is stable, and good welding performance can be achieved.

In addition, the switch-type current output waveform has an angular shape 26, and its frequency is a set switching frequency. The peak value of the angular waveform depends on the time constant frequency and pulse width of the welding circuit. When the output welding current waveform changes in a low-frequency period, the low-frequency pulse waveforms all carry the angular waveform controlled by the switching amount, and the current waveform with a frequency of 20 Tian2. Therefore, this low-frequency carrier pulse arc also has the characteristics of high-frequency arc.

4 Conclusions The output current of the arc welding inverter power supply is adjusted based on the switch control method. There is no overshoot and the response speed is fast. It can achieve stable arc combustion and high stiffness. Whether it is DC or low-frequency pulse current, the welding arc has a high-frequency arc. Characteristics, it can improve the welding quality.

The use of a microchip computer system can meet the requirements of arc control, and has the characteristics of low cost, flexible control and high reliability.

Good Chinese character interface in the welding process, easy to understand and can operate according to the standard = I 赵家瑞. Inverter welding and cutting power supply. Beijing Machinery Industry Press, 1995.

2 Wei et al. Study on the external characteristics of arc welding power supply controlled by single chip microcomputer. Welding machine. 1963 Wu Xianping, etc. 1; 1 Inverter-type hand arc; design of dual-purpose welding machine. Power electronics, electromagnetic measurement, master degree, lecturer. Directly engaged in teaching and scientific research and development work. The direction of research is the development of power electronics technology test and measurement intelligent control and computer hardware and software development. Now he has published the remaining papers in domestic core journals and other magazines. The newsletter President of the American Welding Society visited Kazakhstan on January 12, 2000 Go in and visit. Former Chairman of China Welding Society Wu Lin Advisor Lin Shangyang Secretary-General Zhang Yanmin and Deputy Secretary-General Park Dongguang warmly received them and exchanged views on the situation of the China-US Welding Society. The two parties will be in Chicago in April 2000 Sign a new bilateral agreement between the China-US Welding Society to strengthen future exchanges and cooperation. Mr. Fengshan 1; 80, President of the American Welding Society, also visited the Harbin Sino-German Welding Technology Training Center of Harbin Welding Research Institute and the State Key Laboratory of Modern Welding Technology of Harbin Institute of Technology. He affirmed the development of China's current welding technology and praised China's advanced welding technology. Through this visit, China ’s 7.

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