Advantages and application of robot automatic welding technology

Advantages and application of robot automatic welding technology

The application of mechanical automation technology in welding production line has experienced three stages: imitation, self-development and steady development. Special welding machines in welding manufacturing industry will be widely used. In the process of welding production, the degree of mechanization and automation will be increased by about 15%, and the degree of welding automation will reach 40 ~ 50%. In order to develop welding automation technology, China is in & ldquo; The Ninth Five Year Plan; CIMS technology, CAD / CAM, CAPP, CAPM and other technologies around computer technology have been listed as key promotion projects in the plan. At present, China's robot automatic welding technology has developed relatively mature. Let's take a look at the advantages and applications of robot automatic welding technology.

In the early 1980s, China carried out in-depth research on the application of industrial robots. After more than 20 years of efforts, gratifying achievements have been made in technology and application. Moreover, it has played an important role in promoting the development of manufacturing industry. In recent years, China has shown a rapid growth momentum in the field of welding robots, with a growth rate of more than 60%. In 2005, the number of new robots in China exceeded 5000, but it accounted for only 6% of the new number in Asia.

In industry, the advantages of robot automatic welding technology are mainly reflected in the following aspects:

1. Improve production efficiency

The welding robot has short response time and rapid action. The welding speed is 60-3000px / min, which is much higher than that of manual welding. The robot does not stop or rest during operation, but it is impossible for workers to stop and rest at work. At the same time, the working efficiency of workers is also affected by mood and other factors. Workers will ask for leave, daze, chat, smoke and go to the toilet, Overtime pay should be paid for overtime, but the robot has no above problems. As long as the external water, electricity and other conditions are guaranteed, it can continue to work, which virtually improves the production efficiency of the enterprise.

2. Improve product quality

In the welding process, as long as the welding parameters and motion trajectory are given, the robot will accurately repeat this action. The welding parameters such as welding current, voltage, welding speed and welding wire length play a decisive role in the welding results. When robot welding is adopted, the welding parameters of each weld are constant, and the weld quality is less affected by human factors, which reduces the requirements for workers' operation technology. Therefore, the welding quality is stable, so as to ensure the quality of our products. In manual welding, the welding speed and wire elongation change, so it is difficult to achieve the uniformity of quality.

3. Reduce enterprise costs

The reduction of enterprise cost by welding robot is mainly reflected in large-scale production. One robot can replace 2 to 4 industrial workers, which is different according to the specific situation of the enterprise. The robot has no fatigue and can produce continuously 24 hours a day. In addition, with the application of high-speed and efficient welding technology, the cost of robot welding is reduced more obviously.

4. Easy to arrange production plan

Due to the high repeatability of the robot, as long as the parameters are given, it will always act according to the instructions. Therefore, the robot welding product cycle is clear and it is easy to control the product output. The production rhythm of the robot is fixed, so the production plan is very clear. Accurate production planning can maximize the production efficiency and comprehensive utilization of resources.

5. Shorten the cycle of product upgrading

Robot welding can shorten the cycle of product upgrading and reduce the corresponding equipment investment. It can realize the welding automation of small batch products. The biggest difference between robot and special machine is that it can adapt to the production of different workpieces by modifying the program. When the product is updated, only the corresponding tooling fixtures need to be designed according to the updated products. The robot body does not need to make any changes. As long as the changes call the corresponding program commands, the products and equipment can be updated.

Because robot automatic welding technology has so many advantages, according to incomplete statistics, welding robots serving the field of welding processing account for about half of the industrial robots in service all over the world. Now let's take a look at the application of robot automatic welding technology. That is, the application of welding robot.

As we all know, in the manufacturing industry, welding processing is one of the occupations with poor production environment and high risk. Moreover, the requirements of welding processing on the technical level of welders are also relatively high. It requires welders to have skilled operation skills, rich practical experience and stable welding level. The emergence of welding robots enables people to get rid of the extremely bad working environment, reduce the labor intensity of welders, and improve the quality and efficiency of welding.?? Welding robots have many structural forms, such as rectangular coordinate, cylindrical coordinate, spherical coordinate, multi joint coordinate, telescopic, crawling and so on. In practical use, different structural forms can be selected according to different occasions to complete the corresponding work tasks. The multi joint robot imitating the function of human arm can move arbitrarily in the spatial degree of freedom, and the arm has the greatest flexibility. It can adjust the spatial position and posture of the welding gun to any state to meet the needs of welding. Therefore, it is also the most widely used one at present.

Due to the continuous improvement of welding robot technology and the wide application of arc sensor technology in robot welding, the problem of seam tracking and control of robot arc welding is solved to a certain extent. In the automobile manufacturing industry, due to the wide application of welding robots, it has also rapidly developed from the original single automobile assembly spot welding to the electric arc welding of automobile parts and assembly process. Because robot arc welding can change the welding track and welding sequence at any time through the program, it is most suitable for products with large variety of workpieces, short and many welds and complex shapes. Most of these products appear on the car body, which is just in line with the characteristics of the automobile manufacturing industry. In addition, there are more and more automobile styles and the update speed is faster and faster. The adoption of automobile production line with robot equipment can better meet the rapid development of automobile manufacturing industry in today's society. Welding robots are widely used in automobile manufacturing, automobile chassis, seat frame, guide rail, muffler and hydraulic torque converter, especially in automobile chassis welding production.

As an important part of marine engineering equipment technology, marine welding has become an indispensable foundation and supporting technology for marine resource development and marine engineering construction. After a large number of process tests and formula adjustments, the developed welding materials and underwater welding special equipment have been successfully applied to offshore oil production platforms in Shengli Oilfield, Hong Kong Zhuhai Macao Bridge and other offshore projects.

After understanding the advantages and applications of automatic welding robot, we know that welding robot plays an extremely important role in today's high-quality and high-efficiency welding production. The research, development and application of industrial robot technology have effectively promoted the development and progress of industrial technology in the world. In recent years, the research and application of welding robot technology have made outstanding achievements in weld tracking, information sensing, intelligent control and so on. With the continuous development of advanced technologies such as computer technology, intelligent control technology and artificial intelligence technology, there are still many problems waiting for us to seriously study in the field of welding robot technology, especially the visual control technology, intelligent control technology and embedded control technology of welding robot will be the main research direction in the future.