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The application of laser welding technology in ship industry

by:J&D WATER     2020-03-21
Technology is one of the key technologies of modern shipbuilding mode. In the hull construction, welding, welding costs about accounted for about 40% of the total cost of the hull construction. Therefore, the welding technology and productivity directly affect ship construction cycle, the production cost, the quality of the product. Our country is the world shipbuilding powers, but to be a shipbuilding powers, it must attach importance to the development and application of high efficient welding technology. At present the traditional arc welding method is still a main connection method in the shipbuilding, but it can bring obvious welding deformation and a lot of orthopedic work after welding. Laser welding because of its high energy density and low heat input, high welding speed, narrow heat-affected zone and weld depth than the big advantages of small welding deformation of wide, is indispensable to the welding technology development a high efficient welding technology, especially in Marine has obvious advantages in the welding of aluminum alloy. In ship industry, laser welding and arc welding combined two methods, which can effectively improve the efficiency of welding, dependent on width of arc fusion zone effect, and can greatly improve the equipment clearance, at the same time can be changed by wire filling welding seam organization performance, thereby reducing the workload and before welding assembly process in the shipbuilding cost. Hull structure composite laser arc welding current composite are mainly in the form of optical fiber laser and electric arc or disc laser and TIG, MIG or plasma arc compound. In the process of composite of three kinds of heat source, formed a way to enhance the adaptability of the welding. But this combination will also laser non-contact welding back the category contact welding method. Composite laser arc welding principle diagram is now in the high strength steel 10 - EH36 18 mm thick plate welding, aluminum alloy 5 - 8 mm thick plate in the single side welding ( No penetration type) , T 20 mm carbon steel connections made more mature technology application. High strength steel is mainly used in EH36 shipbuilding industry, its at low temperature with high strength, toughness and corrosion resistance and so on comprehensive performance is good, also can reduce weight of hull, improve load etc, and is suitable for the construction of the ocean each of hull of the ship. The traditional arc welding inefficient, weld surface defects are prone to depression and bite edge, on the formation of flash and other defects. Other welding heat input is large, small penetrating power, in the welding process is not only need to consider the problem of deformation control, also need to consider problems such as stress relief after welding. 10 kw laser composite welding arc can be one-time through 18 mm thickness, compared with the conventional arc welding, the welding efficiency is far more than expected, the welding process is greatly simplified. In recent years, and some of the hull in reference aluminum alloy structure, especially the boat, ferry, patrol boat, luxury yacht, etc. Relative to steel structure, aluminum alloy vessel has the characteristics of lightweight, high speed, flexibility, energy saving. Aluminum alloy density is small, the intensity is high, but the material of aluminum alloy special, makes laser welding of aluminium alloy sheet forming is good, when more than 5 mm thick plate welding, unstable hole formed by the laser penetration, lead to welding is very poor, some problems such as air. By joining arc can avoid these defects, arc preheating of aluminum plate, as well as the light induced plasma dilution, the absorptance of laser is to improve the material, and the stability of the laser transmission. Composite laser arc welding has both the advantages of laser welding and arc welding, can satisfy the requirement of shipyard for assembly gap, welding distortion and orthopaedic after welding, small amount of work has good comprehensive economy. Especially with aluminum alloy of ship building, composite laser arc welding will be better reflected and the advantages of application in the shipping industry prospect will be broader. Laser welding equipment recommendation: preferential deals offer 4007001618 【 Metal laser welding equipment 】 Suitable for all kinds of complex welding, the welding of different equipment and 1 mm thick seam welding; Multi-channel fiber optic mode, welding transfer at the same time; 【 Mould laser welding equipment 】 Applicable mould industrialized, used for precision mold repair, such as digital products, mobile phones, toys, automobile, motorcycle, mold and other mold manufacturing and molding industry. 【 Gold and silver jewelry laser welding 】 Mainly used in jewelry, such as electronics, communications, handicrafts and other industries; 【 Large laser welding 】 Application in automobile body covering parts of compound, such as car door, side wai, window, floor, warehouse, the warehouse before, trunk lid. 【 Automatic laser welding machine 】 Using numerical control software by moving or rotating workpiece computer control of mechanical system, so as to realize automatic welding 【 The laser spot welder 】 Can be used for jewelry, watches and clocks hairspring, integrated circuit lead all kinds of small, precise welding of heat sensitive parts of the YAG laser welding machine 】 High density, the structural weld, precise control, high power density, deep and narrow welds, weld characteristics of bright and beautiful more laser welding laser welding laser welding machine the welding equipment
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