新葡的京集团3512vip(股份)有限公司

With the development of technology, and in order to adapt to the welding of some specific precision parts or to facilitate field work, welding equipment has been developing in the direction of miniaturization and miniaturization.

The Essen Welding and Cutting Exhibition sponsored by the German Welding Society is one of the largest welding and cutting exhibitions in the world. The exhibition represents the most advanced welding materials, technology and automation equipment in the field of welding and cutting in the world. The prominent feature of this exhibition is the rapid development of welding automation. From ordinary gas shielded welding to advanced friction stir welding, it can be operated by robots instead of traditional manual operation. Flexible manipulators and precise numerical control platform greatly improve the welding efficiency and quality. The automatic seam tracking technology ensures the welding accuracy, and the online seam detection technology improves the welding efficiency and quality. Compared with traditional thermal cutting technology, water knife cutting will not produce smoke and harmful gases, and completely achieve green environmental protection. German miniature vacuum electron beam welding equipment is more sophisticated, vacuum chamber is only the size of human head.

1. High degree of digitalization and automation of welding and cutting equipment

One of the most important points of this welding exhibition is the high degree of digitalization and automation of welding and cutting equipment. In addition to electrode arc welding and argon arc welding equipment, most welding and cutting equipment adopt NC numerical control system and man-machine interface. Operators can set welding parameters or compile welding parameters freely according to different welding parts through man-machine interface. Welding procedure is stored in NC control system, which can store up to hundreds of welding procedures. Intelligent welding is realized. At the same time, robot or manipulator system is used to realize all-round and efficient automatic welding or cutting. It not only reduces the labor intensity, greatly improves the efficiency, but also obtains stable and reliable high-quality welds, and has good repeatability, reproducibility and consistency of welding quality.

Major manufacturers have tried their best to attract the attention of visitors. For example, ABB uses two robots to "work" together. Each robot's end arm "grabs" a display screen the size of a home TV, and then forms a picture together. FANUC introduced two robots to cooperate with the display of "welding" basketball line. As we all know, there are many spherical lines on the surface of basketball. The direction of these spherical lines well represents the shape of various complex welds, such as saddle-shaped, intersecting lines and so on. If only one welding robot is used in these welds, it is very difficult to achieve, and if two robots work together, it is very easy to achieve. FANUC has solved these problems very well, and it can be seen from the contents of its company's exhibition that these problems have been solved quite beautifully.

The cooperative motion of robots is a highlight of this Exhibition. Traditional welding robot has a turntable with only 8 degrees of freedom. Although it can weld complex welds with complex shapes, with the development of small batches and diversification of products, a robot with a turntable can not meet the requirements at all. The cooperative motion of the two robots can produce a total of 12 degrees of freedom, which greatly increases its "flexibility" and is fully capable of various complex welds, as shown in Figure 1. These technologies can not only realize high-speed and high-efficiency welding, but also reduce manufacturing costs and greatly shorten manufacturing cycle, if they are popularized and applied in the welding of large structural parts such as vehicle body and turret in the weapon industry.

2. Large-scale power and miniaturization of welding equipment

In order to meet the demand of welding production for some parts with large thickness, various high-power welding equipment emerged as the times require, especially high-energy beam welding equipment, such as laser and electron beam welding equipment. With the breakthrough of key technical bottlenecks in equipment manufacturing, some high-power or ultra-high-power welding equipment have been produced. At present, the power of high-power laser can reach more than 10 kW, which can be used for the welding of combined gears and thick plates. The power of CVE high-power electron beam welding machine in Britain can reach more than 100 kW, which can penetrate 380 mm thick stainless steel sheet at one time. It can also be used in electron beam free-form manufacturing technology and surface precision forming for high-energy beam processing technology. The application of technology in manufacturing industry provides a broader prospect.

With the development of technology, and in order to adapt to the welding of some specific precision parts or to facilitate field work, welding equipment has been developing in the direction of miniaturization and miniaturization, as shown in Figure 2. Another major feature of this exhibition is that the welding machines on display have become smaller and more convenient from the traditional "silly, big, clumsy and coarse". Welding and cutting equipment is small in size, light in weight and portable, which can fully meet the welding needs of different environments and occasions. Typical small-scale welding equipment is miniature electron beam welding equipment produced by FOCUS, Germany. Its power is 2 kW and vacuum chamber size is 200 mm2. The whole welding system is only desk size, which can meet the welding of various small-sized precision parts. Shanghai Shanghai Hugong series mini-inverter arc welding machine has a minimum size of 185mm *75mm *140 mm and a weight of only 1.8kg. It is easy to carry and meets the requirements of field operation. This is of great significance for the repair of large-scale weapons and equipment in service.