In the laser gas shielded Cast Iron Welding Electrode techniques, as the laser beam is emitted at the same time there are two beams of gas shielded arc welding arc acting on the molten bath, three welding nozzle integrated in an automatic welding of the welding head, the additional welding arc of the laser gas protection welding technology with traditional laser hybrid welding technology with the essence of the difference.
Laser welding and arc welding technology has a fierce competition on the one hand, the other hand, the combination between the two and innovative. In the so-called laser gas shielded welding techniques, the combination of the two having a higher welding efficiency, but also the cost savings. , Fronius welding and cutting during the professional exhibitions in 2001 for the first time shows the the practical economics laser protection gas welding equipment. Since then, a total of 65 sets of welding equipment into the automobile industry's mass production of industrial application. In car manufacturing, these laser protective gas welding equipment for welding of aluminum alloy and steel axles, doors and roof frame structure, the largest welding sheet thickness up to 4mm.
R & D of new laser gas shielded arc welding
Fronius company plans in 2009, the laser and two shielded welding electrode welding, cutting equipment market. This series of equipment used in the laser gas shielded welding technology combines the advantages of the two welding laser welding and gas-shielded welding technology. The diversity of applications and the specific advantages from the laser and gas metal arcTungsten Welding Electrodestip of living in an automatic welding head, laser welding beam and two gas shielded welding arc interaction in the bath of the weldment.
The first laser welding and gas metal arc welding fusion welding test can be traced back to the 1980s. However, the past 20 years, this technology has been hovering in the lab, never taken to the door of the laboratory. In this composite welding technology, laser beam and the the protective arc welding simultaneously at the weld of the welding member. Laser beam at very high energy deep melting the weldment internal; continuous conveyor the MSG gas shielded welding system issued by the welding arc welding consumables, to form a wide flat surface weld. This hybrid welding technology combines the advantages of laser welding (welding speed, weld heat affected zone, weld depth) and gas shielded arc welding advantages (good weld connection ability, high weld strength and can use of welding consumables, ability of the destination to improve weld quality).
Based on the laser gas shielded arc welding application experience, users hope the laser gas shielded arc welding equipment is more powerful, the focus is to solve the welding of thick steel plate, there is a better way of melting and faster welding speed. Process analysis and use of evaluation based on the Fronius technical personnel, that the laser plus two protective composite welding electrode welding technology is the best solution. In this scenario, the most important question is: will the laser tip with two gas shielded arc welding tip as small as possible automated welding head should be as small as possible, the spacing between the laser welding beam and arc integrated . In addition to the factors of the welding technique, the size and movement of the welding head performance, accessibility performance is the need to solve the technical problems.
China is the world steel consumption, and consumption of welding materials than any other country. According to 2006 statistics, China's steel production of 420 million tons, accounting for 34% of the world's steel production, welding materials production of about 3.2 million tons, about 50% of the production worldwide welding consumables. The article describes the future of welding consumables demand trends, analysis of current demand conditions by region and by industry, outlining the future development trend of welding materials.
1, the market demand will continue to rise in the 16th National Party Congress report clearly pointed out that one of the main tasks of the economic construction of the first two decades of the 21st century, China, basically accomplish industrialization. China is now in the industrialization of the mid-stage of development. The course of the world, a country in the industrialization and development period, the consumption of steel and welding consumables will continue to grow. Such as the United States and Japan are basically complete industrialization in the 1970s, the consumption of steel and welding consumables peak and then decline steadily. In the next 10 years, China's steel and welding consumables consumption will continue to growth, but the growth rate will moderate slowdown, adjust the focus on product variety and quality improvement. According to the experts predict, 10 years after China's steel consumption may reach 6 to 7 million tons. Therefore, the corresponding welding materials demand of 400 to 450 million tons. 2, according to the geographical distribution of demand conditions in China's economic development, regional differences.
Table 1 shows the distribution by region in recent years, the proportion of steel consumption. Due to the lack of statistics on the welding material, the data shown in Table 1 can also be indirect as Welding Electrode Materialsdemand conditions. 3, according to the demand conditions in the industry by industry demand, China's steel and welding consumables, with a maximum difference of developed countries: In recent years, China's construction steel accounted for about 55%, less than 45% of the industrial manufacturing steel, while the United States, construction steel in Europe and Japan accounted for only 22% to 30%, and the industrial manufacturing sector accounted for 60% to 66% of steel. This difference also reflects the characteristics of the current stage of development in China, and in a large number of infrastructure and urbanization.
Welding materials development trend
1, welding automation progress to promote structural adjustment of the welding consumables varieties the mid-1980s, approximately 50% of developed countries electrodes accounted for welding consumables. 2004, Europe, North America (U.S. and Canada), Japan in the consumption of welding consumables, welding rod ratio have been less than 20%, as shown in Table 2, that is, automated and semi-automated welding developed countries have accounted for more than 80% of the entire welding workload.
Steel scientific and technological progress to promote welding consumables replacement of varieties and quality to enhance the country is striving direction of power to a power of steel from steel, has launched in recent years, a large number of upgrading and high-performance high-quality steel, especially in the production of iron and steel industry the level of equipment and technology has come a long progress, for example, will be gradually put into operation more than 10 sets of plate mill, its performance will exceed the existing mill in Japan and the United States to become the world's new generation of modern plate mill, for the realization of controlled rolling and cooling ( TMCP) technology, the production of high-volume, high-performance plate, laid the basic equipment.
Market orientation of production and consumption of most ordinary welding consumables to a wide range of large, should be promoted to higher prices for better quality the ordinary welding consumables, including knot 422 carbon steel electrode, HJ431 flux, ER50-6 plated copper wire products, due to the expansion of production capacity, the oversupply of domestic and export prices of welding materials, only the equivalent of 50-60% of similar quality welding consumables price in international market, some welding consumables enterprises adopt a "low-cost, low- quality, low price, "the vicious competition means in recent years, many domestic users reflect some the knot 422 electrodes ordinary quality welding consumables, not only failed to progress, but has slipped. Foreign markets reflect some of China's enterprises exported low quality parallel the ordinary welding consumables is cheap but the quality is not good, can only be used in a secondary project to China's "welding consumables image" caused by the bad influence.
4, to promote cooperation with the steel mills, the main bottleneck to solve the problem of shortage of wire varieties of welding consumables development, gas shielded solid wires and submerged arc welding solid wire variety and quality to meet the market demand.
Include a variety of different intensity level high strength steel wire, heat-resistant steel wire, low temperature steel wire, resistance to atmospheric corrosion of steel wire, stainless steel wire.
As for the domestic and foreign manufacturers have introduced a so-called copper wire, it should be called a special coating wire, due to the different components of the manufacturers coating and surface treatment differences, different wire performance. Performance coatings and surface treatment processes, not only played the role of anti-rust and lubricating, the copper welding fume and enhance the wire arc stability and reduce welding spatter.
Domestic and foreign manufacturers of wire coating and surface treatment processes in continues to improve.