1. A few years ago, the digital controlled welding machine was only the "cutting-edge technology" of a few international well-known companies, but now the digital controlled welding machine has been widely used in many enterprises in China. With the promotion of kemppi in Finland and Fronius in Austria, the digital welding machine has entered the stage of industrial scale production. Although the intelligence is still in the primary stage, it has broad prospects and is an important development direction. In recent years, the expert system of welding engineering has been studied deeply at home and abroad, and some commercial welding expert systems have been launched or are ready to be launched. Welding expert system is equivalent to the knowledge of experts and the advantages of welding automation
(1) To improve welding efficiency, welding processing is one of the most important processing methods in Chinese manufacturing enterprises. The welding time of manufacturing enterprises dominated by welding process accounts for 10% - 30% of the total working hours of product manufacturing, and the welding cost is about
2. Inspection level, and computer software system with the ability to solve special welding problems. The computer integrated management system of welding quality developed on this basis has also been applied in welding. Its contents include the analysis of initial test data and data, product quality inspection, sales supervision, etc. its software includes the specific application of database, expert system and other technologies. Welding robot is a revolutionary progress of welding automation. It breaks through the traditional way of welding rigid automation and develops a new flexible automation method. The main advantages of welding robot are: stabilizing and improving the welding quality, ensuring the uniformity of welding products; improving the production rate, which can be continuously produced 24 hours a day; it can work for a long time under harmful environment and improve workers It can realize the welding automation of small batch products and provide technical basis for welding flexible production line. In order to improve the automation of the welding process, in addition to controlling the automatic tracking of the arc to the weld, it is also necessary to control the welding quality in real time. Therefore, it is necessary to detect the welding groove conditions in the welding process, such as weld width, penetration and back weld bead forming, so as to timely adjust the welding parameters and ensure good welding quality. This is intelligent welding. The first development focus of intelligent welding is vision system, and its key technology is sensor technology. 2. The development of welding heat source: from the development trend, as the welding heat source, the energy density should be highly concentrated, the welding process can be realized quickly, and the dense and strong weld and the minimum heat affected zone can be obtained. At present, welding heat sources have been very rich, such as flame, arc, resistance, ultrasonic, friction, isotherm, electron beam, laser beam, microwave and so on. However, the research and development of welding heat source has not been terminated. Its new development can be summarized as three aspects: first, the improvement of the existing heat source to make it more effective, convenient, economical and applicable. In this respect, electron beam and laser beam welding are also introduced The second is to develop better and more effective heat sources, which can obtain stronger energy density by superposition of two kinds of heat sources, such as adding laser beam into electron beam welding, etc.; the third is energy-saving technology. Because welding consumes a lot of energy, there are many new technologies aiming at energy saving, such as solar energy welding, resistance spot welding using the development of electronic technology to improve the power factor of welding machine. ??
3. Summary Although welding technology has made great progress in China, there is still a certain gap between China and Europe and the United States in the development of welding technology. In order to adapt to the rapid development of domestic and foreign markets and fierce competition, welding automation and intelligent and welding heat source will be the important research direction of future welding development, and also the future development trend The research and development of welding technology, especially the development of efficient, energy-saving and high-quality welding equipment and its digital control technology and new welding heat source or welding materials. On the other hand, the continuous development of advanced manufacturing technology is putting forward higher and higher requirements for the development of welding technology from the aspects of informatization, integration, systematization and flexibility, which promotes the welding automation technology The development of surgery. Especially the introduction of numerical control technology, flexible manufacturing technology and information processing technology promotes the revolutionary development of welding automation.