Present situation and Prospect of welding automation technology

At present, the welding automation rate in China is less than 30%, which is far from nearly 80% in developed industrial countries. It can be predicted that in the next 10 years, the level of domestic automatic welding technology will develop at the speed of * * *.

With the increasing maturity of digital technology, digital welding machine and digital control technology representing automatic welding technology have been introduced and have steadily entered the market. The Three Gorges project, West to east gas transmission project, aerospace project, shipbuilding project and other national large-scale basic projects have effectively promoted the development and progress of advanced welding technology, especially welding automation technology. The requirement of welding automation in the manufacture of automobile and parts is changing with each passing day. China's welding industry is gradually moving towards & ldquo; Efficient, automatic and intelligent & rdquo;. At present, the welding automation rate in China is less than 30%, which is far from nearly 80% in developed industrial countries. Since the end of the 20th century, the country has gradually promoted the basic welding method of automatic welding in various industries & mdash& mdash; Gas shielded welding, which replaces the traditional manual arc welding, has achieved initial results. It can be predicted that in the next 10 years, domestic automatic welding technology will develop at the speed of * * *.

Current situation of high efficiency and automatic welding technology

In the 1990s, China's welding industry took the realization of mechanization and automation of welding process as a strategic goal, which has been implemented in the scientific and technological development of various industries. Considerable progress has been made in the development of welding production automation and process control intelligence, the research and development of welding production line and flexible manufacturing technology, and the development and application of computer-aided design and manufacturing technology.

(1) GMAW will gradually replace manual arc welding and become the mainstream of welding. It is estimated that in the next 10 years, the proportion of solid core welding wire in welding material consumption will increase from 15% to 30%; Flux cored wire has increased from 2% to 20%; Submerged arc welding materials will also continue to grow at the level of 10%. Among them, the growth rate of flux cored wire is significantly increased, which will exceed that of solid cored wire in the next 20 years, and * * * will eventually become the leading product in welding.

(2) The intelligent inverter welding machine with high efficiency, energy saving and automatic adjustment of welding parameters will gradually replace the manual arc welding machine and ordinary thyristor welding machine, and the operation of the welding machine tends to be simple and intelligent, so as to meet the trend of weakening operation skills.

(3) In the fields of automobile, shipbuilding, engineering machinery and aerospace, intelligent welding robots suitable for different occasions are widely used, which greatly improves the welding quality and production efficiency. The majority of welding workers have made arduous efforts to promote efficient and automatic welding technology and achieved great development, which has significantly improved the welding automation level of China's manufacturing industry.

To promote the process of welding automation, learning, absorption, reference and improvement are very important links, and the learning and improvement of existing processes should be strengthened. Because most of the existing processes are manual operation, it has its limitations, but if we use modern automation technology for grafting transformation on the basis of learning, we can often achieve a certain breakthrough.

Prospect of welding automation technology

The development of electronic technology, computer microelectronic information and automation technology promotes the development of welding automation technology. In particular, the introduction of unit technology such as numerical control technology, flexible manufacturing technology and information processing technology has promoted the development of welding automation technology.

(1) The intellectualization of welding process control system is one of the core issues of welding automation, and it is also an important direction of our future research. We should carry out research on optimal control methods, including linear and various nonlinear controls*** The representative is the research of fuzzy control, neural network control and expert system in welding process.

(2) Welding flexibility technology is also the content of our research. In the future research, we will organically combine various optical, mechanical and electrical technologies with welding technology to realize the accuracy and flexibility of welding. The fundamental way to improve the level of welding automation is to transform the traditional welding process equipment with microelectronic technology. It is our current research direction to combine numerical control technology with all kinds of welding machinery and equipment to improve its flexibility and quality control level; In addition, the combination of welding robot and expert system to realize the functions of automatic path planning, automatic correction of trajectory and automatic control of penetration is the focus of our recent research.

(3) The integration of welding control system is the integration of human and technology and the integration of welding technology and information technology. In the integrated system, information flow and material flow are important components. Promoting their organic combination can greatly reduce the amount of information and the requirements of real-time control. Attention should be paid to giving full play to people's response and judgment in control and on-the-spot processing, establishing a friendly interface of man-machine dialogue, and making people and automatic system harmonious and unified, which are the factors that can not be underestimated in the integrated system.

(4) Improving the reliability, quality stability and controllability of welding power supply, as well as excellent dynamic characteristics, is also the subject we focus on. A high-performance welding machine that can adjust arc motion, wire feeding and welding gun attitude, detect weld groove shape, temperature field, molten pool state and penetration, and timely provide welding specification parameters shall be developed, and the computer simulation technology of welding process shall be actively developed. In short, make the welding technology from & ldquo; Skill & rdquo; To & ldquo; Science & rdquo; Evolution is an important aspect of realizing welding automation.

The first 15 years of this century will be a favorable period for the rapid development of the welding industry. Our welding workers have a heavy task and a long way to go. We must establish the determination to overcome difficulties, seize opportunities and strive to improve the level of welding automation in our country.