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Marine engineering equipment is a very large steel structure. The manufacturing materials are mostly steel plates with large thickness and high strength. The requirements for corrosion resistance, stability and safety are very strict, and the requirements for welding technology are relatively high. It is sometimes difficult to guarantee the quality of construction using ordinary welding techniques. Therefore, the development of high-efficiency welding technology, especially the development of offshore equipment automation welding equipment, has become a future trend in this field.
In recent years, the global marine engineering market has continued to thrive, directly driving the rapid development of the offshore equipment manufacturing industry. China has also included this industry in strategic emerging industries and has given strong support. At present, more and more domestic enterprises are beginning to enter the field of offshore equipment manufacturing. “However, offshore equipment is a typical high-tech product, which has high requirements for manufacturing enterprises. Domestic enterprises need to solve many technical problems in order to enter this field, including welding technology.†China – Ukrainian Barton Welding Research Institute Yang Yongqiang, dean and professor of South China University of Technology, said in an interview with reporters that offshore equipment is a very large steel structure. The manufacturing materials are mostly thick and high-strength steel plates. Therefore, efficient welding technology is needed in the manufacturing process. In order to meet its stringent requirements in terms of corrosion resistance, stability and safety, to ensure its normal operation in the marine environment.
When analyzing the reasons for the difficulties in the welding technology of offshore equipment, Yang Yongqiang believes that first, the manufacturing materials are mostly thick steel plates, and second, the strength of the materials is high. “In general, the thickness of the steel plate used in offshore equipment is 60-180 mm. If ordinary welding technology is used, there will be many problems.†For example, he said that the low-temperature toughness of the material should be considered when welding offshore equipment. Improper handling of the process can lead to brittle fracture of the material, which can lead to major accidents. At the same time, the weldability, layer tear, fatigue strength and other issues of the material need to be taken into consideration during welding, which are technical difficulties.
“High material strength is also one of the main reasons for the high technical requirements for offshore equipment welding. The strength of marine equipment manufacturing materials is generally 390-800. This requires welding workers with high technical level and rich construction. Experience." Yang Yongqiang said that at present, China's automation in offshore equipment welding is relatively low, and many irregular steel structures can only be used by manual welding, which brings many problems. On the one hand, the manual welding of offshore equipment has relatively high technical requirements for the welder. It is generally required to pass the 6GR certification of the classification society, and the investment and difficulty of cultivating such a welder are very large; on the other hand, the welder's liquidity comparison Large, if the company can not retain the welders who have obtained higher qualifications, it will affect the efficiency and quality of the construction. In addition, even for advanced welders, the quality of the weld is affected by the mood and skill of the work, and instability occurs.
“The manufacturing process of offshore equipment, including cutting, beveling, coil forming, assembly, testing, and final delivery, is very complicated. Therefore, to ensure product quality, improve welding efficiency, and achieve automation is "This is very necessary." Yang Yongqiang said that the development of high-efficiency welding technology, especially the development of offshore equipment automation welding production line has become a trend in the future. South Korea is ahead of this, and some areas in China are still in a blank state. The China-Uttarbat Welding Institute has carried out related research.
It is understood that the China-Uttar Barton Welding Research Institute is a key project of cooperation between China and Ukraine. It mainly focuses on modern welding technology. One of its main directions is advanced welding equipment and technology, and its application field is offshore equipment manufacturing. Yang Yongqiang said that for the welding of thick steel plates, researchers at the China-Ubunta Welding Research Institute are developing automation equipment according to different shapes and different welds in order to use special processes for welding, which can be reduced compared with manual welding. Heat input to increase efficiency.
"At present, the construction of offshore platforms, pipelaying vessels, etc. has a great demand for automated welding technology." Yang Yongqiang said that the application prospects of automated welding equipment in the offshore industry are very broad, and China should increase its research in theory and application. Strength, which is of great significance for domestic enterprises to improve the manufacturing level of offshore equipment.